JP2005073478A - Equipment monitoring device and equipment monitoring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an equipment monitoring device which contributes to the labor saving of repair and maintenance, the facilitation and the quickening of the response at the time of the occurrence of an accident, and improves the operability of the facility and the economical efficiency, and also to provide an equipment mounting system. <P>SOLUTION: The equipment monitoring device has: a status data acquiring part 11 for acquiring status data showing the status of the equipment U to be monitored installed to an equipment monitoring device electric power station; a monitoring calculation part 12 for executing the calculation regarding an operation status or a degradation status of the equipment U to be monitored; a data storage part 13 for storing at least one of the calculation result data regarding the status data and the operation status and that of regarding the degradation state; a data communication part 14 for transmitting the data stored in the storage device via a communication network 3; and a terminal 2 for receiving and displaying the transmitted data via the communication network 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a monitoring device and a monitoring system for equipment installed in an electric station such as a power plant, a substation, or a switching station.

  In general, a substation is provided with a circuit breaker for turning on and off a high-voltage main circuit and a power device such as a transformer. Such devices are required to improve reliability, reduce maintenance burdens, prevent accidents, and respond quickly to accidents. Therefore, conventionally, a power equipment monitoring system has been proposed for the purpose of satisfying these requirements.

  An example of the prior art relating to such a device monitoring system will be described with reference to FIG. That is, this prior art includes a detection device 41 that detects various physical quantities during operation, a measurement device 42 that measures the output of the detection device 41, a measurement data collection device 43 that collects measured data, and measurement data. And a display device 44 for displaying. The measurement data collection device 43 and the display device 44 are installed in the main building of the electric station. When data indicating an abnormality sign of the device is measured, the data is displayed on the display device 44 in the main building of the electric station. Data can be confirmed.

  In addition, when data suggesting an abnormality of the device is measured, the integrated information of the occurrence of the abnormality is transmitted to the upper electric station monitoring apparatus 45 by the contact information, and is transmitted from the electric station monitoring apparatus 45 to the upper upper control station. It is configured to be notified. Note that the data measured by the device monitoring system is stored in the measurement data collection device 43.

  Next, operational effects expected of such a device monitoring system will be described with reference to FIG. Here, FIG. 21 is a potential degradation failure model diagram in which the vertical axis represents the potential characteristic L of the specimen and the horizontal axis represents the elapsed time t. First, in the process of becoming a phenomenon as an accident, when it reaches point f, it progresses at an accelerated rate, and it reaches the accident phenomenon without time allowance, so it is desirable to find an abnormality in warning area B between points a and e. . The reason is as follows.

  That is, since various abnormalities develop in physical phenomena over a long time, it takes a considerable time from the warning area B to the point f. Therefore, even if the occurrence of an abnormality is confirmed, if it is the warning area B, a direct emergency process such as an emergency stop is unnecessary, and a repair margin time due to a spontaneous stop is obtained, and the primary to secondary accident phenomena There is no accident expansion phenomenon such as the next damage, and repair points can be limited to the minimum necessary parts.

  In addition, there are two types of measurement data representing the potential characteristics L. That is, current value data that is the current physical quantity and cumulative value data that is the cumulative value of the physical quantity from the past. For example, when the circuit breaker of a substation is to be monitored, the measurement data corresponding to the accumulated value data is data such as the contact wear amount of the circuit breaker. When a transformer is to be monitored, the measurement data corresponding to the current value data is data such as the load factor of the transformer and the internal winding temperature, and the measurement data corresponding to the accumulated value data is This data relates to deterioration of internal insulating paper.

  Among them, as an apparatus for measuring the contact wear amount of a switch, an example is proposed in Japanese Patent Laid-Open No. 1-14832. The device described in this publication pays attention to the fact that the contact wear amount of the circuit breaker is determined by the interrupted current value. Also, as a device for measuring the internal winding temperature of the transformer, a current proportional to the load current is shunted to the winding provided outside the transformer, and the internal winding temperature is estimated from the measured value of that temperature. In addition, an optical fiber type temperature sensor is directly inserted near the transformer winding and measured.

Japanese Unexamined Patent Publication No. 1-14832

  By the way, in the conventional equipment monitoring system illustrated in FIG. 20, the measured data can be confirmed by a display device installed in the electric power station main building. However, only the aggregate information on the occurrence of abnormality is transmitted to the host control station that controls the operation of the device. Therefore, when an abnormality is detected in a device at a certain electric station, it is necessary for the maintenance staff to go to the electric station and check the data displayed on the display device in the main building in order to check the detailed information. was there. For this reason, it was disadvantageous in various points such as the burden on maintenance personnel, quick response at the time of an accident, operability of equipment, and economic efficiency of the entire facility.

  The on-site measurement data collection device stores physical quantities, time-series data of device status data, and other detailed monitoring results during a specific period, such as when the circuit breaker is operating or when the transformer is overloaded, and later. It did not have a function that enables browsing. For this reason, it has been difficult to understand the cause when a device abnormality occurs and to conduct a more detailed examination.

  Furthermore, in the case of a transformer monitoring device, the life loss monitoring result is a very small amount of accumulated value data over a long period of time, and this significant figure is a value that reaches nearly 10 digits. On the other hand, the storable data format of the nonvolatile storage medium used in such a device monitoring system is generally limited to an integer of up to about 5 digits. For this reason, it is difficult to store effective cumulative value data.

  The present invention has been made in view of the circumstances as described above, and a first object of the present invention is to make it possible to easily check data on the state of equipment installed in an electric station from a remote location. It is to provide a device monitoring device and a device monitoring system that can contribute to labor saving of maintenance, facilitating and speeding up the response when an accident occurs, and improving the operability and economy of the facility.

  In addition, the second object of the present invention is to accurately grasp the state of use of equipment by storing and confirming current value data relating to the operating state of equipment installed at electric power stations and cumulative value data relating to deterioration. It is to provide a device monitoring apparatus and a device monitoring system that can be used.

  In addition, the third object of the present invention is to be able to store and check the fluctuation of the physical quantity in a specific period such as when the circuit breaker is operated or when the transformer is overloaded as time-series data with sufficiently fine time intervals. Thus, it is to provide a device monitoring apparatus and a device monitoring system capable of grasping the cause at the time of occurrence of abnormality and performing more detailed examination.

  Furthermore, the fourth object of the present invention is to enable detailed monitoring data to be stored in the monitoring device for a long period of time, so that the monitoring result does not disappear even in a use state such as a power failure of the monitoring device or long-term use. It is an object to provide a highly functional device monitoring apparatus and device monitoring system that are superior to each other.

  In order to achieve the above object, the invention described in claims 1 to 10 has the following technical features in an equipment monitoring apparatus or equipment monitoring system for monitoring the status of equipment installed in an electric station. Is.

  That is, according to the first aspect of the present invention, the state data acquisition means for acquiring the state data representing the state of the monitored device, and the operation related to the operation state or the deterioration state of the monitored device based on the acquired state data. Monitoring operation means to perform, data storage means for storing at least one of the state data, operation result data relating to the operational state, and operation result data relating to the deterioration state in a storage device, and data stored in the storage device Data communication means for transmitting the data via a communication network.

  According to a tenth aspect of the present invention, in a device monitoring system for monitoring a state of a monitored device installed in an electric station, a state data acquiring unit that acquires state data representing a state of the monitored device, and Based on state data, at least one of monitoring operation means for performing an operation related to the operation state or deterioration state of the monitored device, and the state data, operation result data related to the operation state, and operation result data related to the deterioration state Storing data in the storage device, data transmitting means for transmitting the data stored in the storage device via a communication network, and receiving the data stored in the storage device via the communication network Data receiving means and data display means for displaying data received by the data receiving means And it features.

  According to the inventions of claims 1 and 10 as described above, the status data of the monitored device and the data related to the operation status and the degradation status of the monitored device generated based on the status data are transmitted via the communication network. You can check from anywhere. Therefore, it is possible to easily check the device monitoring data from a remote place such as a control station without the equipment maintenance staff going to the site, and to improve the function of the system. For this reason, it is possible to contribute to labor saving of equipment maintenance, facilitating and speeding up the response in the event of an accident, and it is possible to improve the operability of the equipment and system, thereby improving the economic efficiency of the entire facility.

  According to a second aspect of the present invention, in the equipment monitoring apparatus according to the first aspect, the monitored equipment is a circuit breaker of a power system, and the state data includes an energization current value during operation of the circuit breaker, and the monitoring calculation The means includes wear amount calculation means for calculating a wear amount of the main contact of the circuit breaker based on the energization current value.

  According to the invention of claim 2 as described above, the predicted value of the amount of wear of the main contact can be calculated as data related to the deterioration of the function of the circuit breaker, and this can be confirmed at the terminal or the like via the communication network. Since it is possible, it becomes possible to predict the inspection time of the circuit breaker. Therefore, it is possible to rationalize the maintenance and inspection work and improve the economy of the entire system including the monitored equipment.

  According to a third aspect of the present invention, in the device monitoring apparatus according to the first aspect, the monitored device is a circuit breaker of a power system, and the status data includes circuit breaker trip current data, input current data, and opening / closing of auxiliary contacts. It includes at least one of the state data, and the monitoring calculation means has an opening / closing operation time calculating means for calculating an opening / closing operation time of the circuit breaker based on the state data.

  According to the invention of claim 3 as described above, the operation time of the circuit breaker can be calculated as data related to the deterioration of the function of the circuit breaker, and this can be confirmed at the terminal or the like via the communication network. Based on the change tendency of the operation time, the tendency of the mechanical degradation of the circuit breaker, for example, the occurrence of a mechanical failure can be predicted. Also in these cases, it is possible to rationalize the maintenance and inspection work and improve the economic efficiency of the entire system including the monitored equipment.

  According to a fourth aspect of the present invention, in the device monitoring apparatus according to the first aspect, the monitored device is a breaker of a power system, and the data storage means determines whether the state data includes operation data of the breaker. And a time-series data storage unit that stores the state data as data in a time-series format in a storage device when operation data is identified by the identification unit.

  According to the invention of claim 4 as described above, data during breaker operation, for example, data such as a current waveform can be acquired and confirmed as time-series data. This makes it possible to grasp the cause and perform more detailed examination when an abnormality in the operation state of the circuit breaker is confirmed.

  According to a fifth aspect of the present invention, in the equipment monitoring apparatus according to the first aspect, the monitored equipment is a transformer of a power system, and the state data includes load current data of the transformer, internal oil temperature data of the transformer, and Including at least one of ambient temperature data around the transformer, the monitoring calculation means calculating a load factor of the transformer based on the state data, and a transformer factor based on the state data Winding temperature calculation means for calculating the winding temperature, and life loss calculation means for calculating the life loss of the transformer based on the winding temperature.

  According to the invention of claim 5 as described above, as the data related to the functional deterioration of the transformer, the life loss that can predict the deterioration of the internal insulation paper of the transformer is calculated, and this is calculated via the communication network as the terminal or the like. Therefore, it is possible to predict the inspection time of the transformer and the like. Even in this case, it is possible to rationalize the maintenance and inspection work and improve the economy of the entire system including the monitored equipment.

  According to a sixth aspect of the present invention, in the equipment monitoring device according to the first aspect, the monitored equipment is a transformer of a power system, the state data includes load current data of the transformer, and the monitoring calculation means includes: A switching contact consumption amount calculating means for calculating the consumption amount of the switching contact of the on-load tap changer of the transformer based on the load current data is provided.

  According to the invention of claim 6 as described above, as the data related to the function deterioration of the transformer, the data for predicting the consumption amount of the switching contact of the on-load tap changer is calculated, and this is calculated via the communication network. Since it can be confirmed at the terminal or the like, it is possible to predict the inspection time of the transformer or the like. Even in this case, it is possible to rationalize the maintenance and inspection work and improve the economy of the entire system including the monitored equipment.

  A seventh aspect of the present invention is the device monitoring apparatus according to the first aspect, wherein the monitored device is a power system transformer, and the data storage means determines whether or not the load factor of the transformer exceeds a predetermined value. Load rate confirmation means for confirming, and when it is confirmed that the load factor exceeds a predetermined value, time series data storage means for saving data calculated by the monitoring calculation means in a time series format in a storage device; It is characterized by having.

  According to the invention of claim 7 as described above, particularly during overload operation where the load factor of the transformer exceeds a predetermined value, it is necessary to acquire particularly detailed data. Since time series data can be acquired and checked, optimal operation of the transformer, accurate maintenance and inspection work can be performed, and safety is improved.

  The invention according to claim 8 is the device monitoring apparatus according to any one of claims 1, 4 and 7, wherein the storage device includes the state data, operation result data relating to the operation state, and operation result relating to the deterioration state. It has a non-volatile storage medium for storing at least one of the data.

  According to the invention of claim 8 as described above, since the monitoring data can be stored in the nonvolatile storage medium, it can be stored for a long period of time, and when the power supplied to the device monitoring apparatus is interrupted Can also prevent the loss of data.

  A ninth aspect of the present invention is the device monitoring apparatus according to the eighth aspect, wherein the monitored device is a transformer of a power system, and the data storage means stores operation result data relating to the deterioration state for each predetermined number of digits. A divided data storage unit that stores the divided data pieces in the nonvolatile storage medium is provided.

  In the invention of claim 9 as described above, since the number of digits of individual data can be reduced by dividing the calculation result data, the calculation having a very large number of digits such as transformer life loss data is performed. Even the result data can be stored in a non-volatile storage medium with a small number of stored digits.

  According to the present invention, it is possible to easily check data on the state of equipment installed at an electric power station from a remote location, thereby contributing to labor saving of maintenance and facilitating and speeding up the response when an accident occurs. It is possible to provide a device monitoring apparatus and a device monitoring system that can improve the operability and economy of the facility.

  Embodiments of a device monitoring apparatus and a device monitoring system according to the present invention will be described in detail with reference to FIGS. The present invention can also be grasped as a device monitoring method for monitoring devices according to the procedures shown in the claims and the following embodiments, and also records a computer program for operating the computer according to such procedures and It can also be grasped as a recorded medium.

[First Embodiment]
[Constitution]
First, a first embodiment of the present invention will be described with reference to a block diagram showing the overall configuration of FIG. That is, this embodiment is configured by connecting the device monitoring apparatus 1 and the terminal 2 via the communication network 3. Each element constituting the device monitoring apparatus 1 and the terminal 2 is realized by a computer controlled by a predetermined program or a dedicated circuit. As the communication network 3, any wired or wireless communication network can be used, and it does not matter what LAN or WAN is used or not. Any network standards and communication protocols that can be used at present and in the future can be applied.

[Configuration of device monitoring device]
The device monitoring apparatus 1 includes a state data acquisition unit 11, a monitoring calculation unit 12, a data storage unit 13, and a data communication unit 14. The state data acquisition unit 11 is disposed in the vicinity of the monitored device U to be monitored, acquires the device state amount from the sensor I disposed in the monitored device U and the electrical quantity of the system, and performs sampling. It is means for holding the status data S for a while.

  Based on the state data S in the state data acquisition unit 11, the monitoring operation unit 12 performs an operation by a predetermined operation program, the operation result X related to the operation state of the monitored device U, the deterioration state of the monitored device U Is a means for calculating the calculation result V relating to each. The data storage unit 13 includes a storage device (including a storage medium and its control unit), and at least one of the state data S, the calculation result X, and the calculation result V when a predetermined condition is satisfied. Is stored in the storage device. Further, the data communication unit 14 is means for transmitting at least one of the stored state data S, calculation result X, and calculation result V to the communication network 3.

[Terminal configuration]
Next, the terminal 2 includes a data communication unit 21, a display unit 22, an input unit 23, and a data processing unit 24. The data communication unit 21 is means for receiving the data via the communication network 3. The display unit 22 is means for displaying monitoring data on an output device such as a display. The input unit 23 is a means for performing desired operation input such as a keyboard and a mouse. The data processing unit 24 is a unit that performs processing suitable for display and storage on received data according to an input signal from the input unit 23 or automatically. The terminal 2 may be connected to a printer that outputs data.

[Action]
The operation of the present embodiment having the above-described configuration is as follows. That is, the state data acquisition unit 11 acquires the device state quantity and the electrical quantity of the system detected by the sensor I, samples the equipment state quantity and the electrical quantity, and holds them as status data S for a while. Then, based on the status data S in the status data acquisition unit 11, the monitoring calculation unit 12 calculates a calculation result X related to the operating state of the monitored device U and a calculation result V related to the degradation state. The state data S, the calculation result X, and the calculation result V are appropriately stored in the data storage unit 13 and are appropriately transmitted to the communication network 3 by the data communication unit 14. The transmitted state data S, calculation result X, and calculation result V are received by the data communication unit 21 in the terminal 2 and displayed on the display unit 22 through processing by the data processing unit 24.

  As described above, at the terminal 2 connected to the communication network 3, either the calculation result X related to the operation state of the monitored device U or the calculation result V related to the deterioration state of the monitored device U can be confirmed. Moreover, the status data S (device status data, electrical quantity data) can be confirmed as necessary.

[effect]
According to the present embodiment as described above, detailed information about the monitored device U can be confirmed only in the vicinity of the monitored device U or the system terminal at the electric station, whereas in the communication network 3. It can be confirmed from anywhere by the connected terminal 2. Therefore, the device monitoring data can be easily confirmed from a remote place such as a control station without the maintenance staff of the device going to the site, and the function of the system can be improved. That is, it can contribute to labor saving of equipment maintenance, facilitating and speeding up the response at the time of an accident, and can improve the operability of the equipment and system, thereby improving the economic efficiency of the entire facility.

[Second Embodiment]
[Constitution]
A second embodiment of the present invention will be described with reference to FIGS. This embodiment is basically the same configuration as the first embodiment. However, the computer program or the arithmetic circuit is configured so that the monitoring arithmetic unit 12 operates according to the processing procedure shown in the flowchart of FIG. 3 to be described later. That is, in this embodiment, the monitored device U is assumed to be a circuit breaker of the power system, and the monitoring calculation unit 12 uses the data from the state data acquisition unit 11 to monitor the monitored device U, that is, the circuit breaker. It is configured so that the amount of wear of the main contact can be calculated and the circuit breaker inspection time can be predicted.

  More specifically, as shown in the block diagram of FIG. 2, the monitoring calculation unit 12 includes an identification unit 120 that identifies whether or not the device state data S from the state data acquisition unit 11 is circuit breaker operation data, A wear amount calculating unit 121 that calculates the wear amount of the contact from the energized current value during operation, and an adding unit 122 that adds the wear amount to the accumulated value. Actually, since the calculation is based on the momentary data from just before the circuit breaker operates to the completion of the operation, “in operation” here means such a period. To do.

  This configuration is based on the following idea. First, the amount of wear of the main contact is an item that determines the timing of inspection in the circuit breaker. Since the wear amount of the main contact is determined by the interrupted current value, the wear amount of the contact can be calculated if the energizing current value during the circuit breaker operation can be detected.

[Action]
The main contact wear amount calculation processing procedure by the monitoring calculation unit 12 of the present embodiment as described above will be described with reference to the flowchart of FIG. First, the identification unit 120 in the monitoring calculation unit 12 identifies the device status data S from the status data acquisition unit 11 in step 301. In subsequent step 302, when it is determined that the device state data S identified by the identification process in step 301 is the circuit breaker operation data, the process proceeds to step 303, where the wear amount calculation unit 121 performs the circuit breaker operation. The amount of wear of the circuit breaker contact in the operation is calculated from the electric quantity data E, specifically the energization current value of the circuit breaker. Further, in step 304, the addition unit 122 adds the contact wear amount calculated in step 303 to the accumulated value up to that point.

なお、上記（１）式において、
α：通電電流から損耗量を求める定数
Ｉｓ：通電電流
β：遮断器の種類による定数（通常は１．６程度）
である。 An example of the calculation processing of such contact wear amount will be described below. That is, the evaluation of the contact wear amount can be performed by the following equation (1), for example.

In the above equation (1),
α: Constant for obtaining the amount of wear from energizing current Is: Energizing current β: Constant depending on the type of breaker (usually about 1.6)
It is.

  Here, as shown in FIG. 4, the state of change of the energizing current and the contact point of the circuit breaker when the circuit breaker interrupts the alternating current is shown. The equipment monitoring device samples the energized current at a predetermined frequency, and wears out the contact by integrating the equation (1) for the energized current after the opening point where the circuit breaker contact opens and draws the arc (shaded area in FIG. 4). Calculate the quantity. The timing of the opening point is detected by using the falling edge of the contact.

[effect]
According to the present embodiment as described above, in addition to the same effects as those of the first embodiment, the following effects can be obtained. That is, by obtaining data related to the amount of wear of the contact of the circuit breaker that is the monitored device U, it is possible to predict the functional deterioration of the monitored device U, so that the inspection time can be easily confirmed. Therefore, it is possible to rationalize the maintenance and inspection work and improve the economic efficiency of the entire system including the monitored device U.

[Third Embodiment]
[Constitution]
A third embodiment of the present invention will be described with reference to FIGS. This embodiment is basically the same configuration as the first embodiment. However, the computer program or the arithmetic circuit is configured so that the monitoring arithmetic unit 12 operates according to the processing procedure shown in the flowchart of FIG. That is, in this embodiment, the monitored device U is assumed to be a circuit breaker of the power system, and the monitoring calculation unit 12 uses the data from the state data acquisition unit 11 to monitor the monitored device U, that is, the circuit breaker. The opening / closing operation time is calculated.

  More specifically, as shown in FIG. 5, the monitoring calculation unit 12 is identified as the circuit breaker operation data and the identification unit 120 that identifies whether the data from the state data acquisition unit 11 is the circuit breaker operation data. When the circuit breaker is operating, the circuit breaker operation data S (circuit breaker trip current data, closing current data, or auxiliary contact switching state data) is used to calculate the circuit breaker switching operation time. Part 123.

  An example of a method for calculating such an opening / closing operation time will be described below with reference to FIG. That is, it shows how the command signal (trip current and closing current) and auxiliary contacts (a-contact and b-contact) change when the circuit breaker performs an opening / closing operation. In the equipment monitoring device, the time (T1 and T3) from the generation of the command signal to the start of the operation of the contact of the circuit breaker and the time from the start to the end of the operation (T2 and T4) are measured. In the equipment monitoring apparatus, the command signal is sampled at a predetermined frequency to accurately detect the generation timing of the command signal, and the operation time can be accurately measured.

  This configuration is based on the following idea. First, as an item in which a change tendency appears relatively remarkably when a mechanical failure occurs in a circuit breaker, an opening / closing operation time can be mentioned. The circuit breaker operation start timing can be detected from the trip current and input current generation timing, and the end timing is either the trip current and input current cut off timing or the auxiliary contact switching state changes timing Can be detected.

[Action]
The opening / closing operation time calculation processing procedure by the monitoring calculation unit 12 of the present embodiment as described above will be described with reference to the flowchart of FIG. First, the identification unit 120 in the monitoring arithmetic unit 12 identifies the state data S sent from the state data acquisition unit 11 in step 501. In the subsequent step 502, when the state data S is identified as the circuit breaker operation data in the identification process of step 501, the process proceeds to step 503, where the switching operation time calculation unit 123 causes the device state data during the circuit breaker operation. S, specifically, the circuit breaker switching operation time in the operation is calculated from the circuit breaker trip current data, the closing current data, or the auxiliary contact switching state data.

[effect]
According to the present embodiment as described above, in addition to the same effects as those of the first embodiment, the following effects can be obtained. That is, by obtaining data relating to the switching operation time of the circuit breaker that is the monitored device U, it is possible to predict the occurrence of a mechanical failure of the monitored device U based on the change tendency of the operating time. Therefore, it is possible to rationalize the maintenance and inspection work and improve the economic efficiency of the entire system including the monitored device U.

[Fourth Embodiment]
[Constitution]
A fourth embodiment of the present invention will be described with reference to FIGS. This embodiment is basically the same configuration as the first embodiment. However, the computer program or the arithmetic circuit is configured so that the data storage unit 13 operates according to the processing procedure shown in the flowchart of FIG. 9 described later. That is, in the present embodiment, the monitored device U is a power system circuit breaker, and the data storage unit 13 stores the state data S as time-series data on the condition that the circuit breaker has operated. Is configured to save on.

  More specifically, as shown in FIG. 8, the data storage unit 13 stores the state data storage unit 130 that stores the state data S from the state data acquisition unit 11 and the monitoring calculation result data from the monitoring calculation unit 12. An operation result storage unit 131 to be stored, an identification unit 132 for identifying whether or not the state data S is the circuit breaker operation data, and when the state data S is identified as the circuit breaker operation data, stores the state data S as time-series data. And a time-series data storage unit 133.

[Action]
The monitoring data storage processing procedure by the data storage unit 13 of the present embodiment as described above will be described with reference to the flowchart of FIG. First, the state data storage unit 130 in the data storage unit 13 stores the state data S sent from the state data acquisition unit 11 in a storage medium in step 701. In subsequent step 702, the calculation result storage unit 131 stores the monitoring calculation result data sent from the monitoring calculation unit 12, specifically, the calculation result X related to the device operation state and the calculation result V related to the deterioration state in the storage medium. In subsequent step 703, the identification unit 132 confirms the device state data S.

  In step 704, if it is determined that the state data S is the circuit breaker operation data, the process proceeds to step 705, and the time series data storage unit 133 stores the state data S as time series format data in the storage medium. Save and return to step 701. If the condition is not satisfied in step 704, that is, if it is not determined that the data is the circuit breaker operation data, the process directly returns to step 701. The series of processing can be appropriately terminated as necessary.

[effect]
In the present embodiment as described above, data at the time of switching operation of the circuit breaker, for example, state data such as a breaking current waveform can be stored in a time series format. Therefore, when an abnormality in the operation state of the circuit breaker is confirmed, the cause of the abnormality can be grasped and further detailed examination can be performed by confirming the stored breaking current waveform later.

[Fifth Embodiment]
[Constitution]
A fifth embodiment of the present invention will be described with reference to FIGS. This embodiment is basically the same configuration as the first embodiment. However, the computer program or circuit is configured so that the monitoring arithmetic unit 12A operates according to the processing procedure shown in the flowchart of FIG. That is, in the present embodiment, the monitored device U is assumed to be a transformer in the power system, and the monitoring calculation unit 12A uses the data from the state data acquisition unit 11 to deteriorate the monitored device U, that is, the transformer. Configured to monitor status.

  More specifically, as shown in FIG. 10, the monitoring calculation unit 12A includes an identification unit 120 that identifies whether or not the data from the state data acquisition unit 11 is operational state data of the transformer, and the operational state of the transformer. When it is identified as data, a load factor calculation unit 124 that calculates the load factor of the transformer from the load current, and an oil temperature calculation unit that calculates the oil temperature of the transformer based on the calculated load factor and ambient temperature data 125A, a winding temperature calculation unit 125B that calculates the transformer winding temperature from the calculated load factor and oil temperature, and a life loss calculation unit 126 that calculates the transformer life loss from the winding temperature. And an adder 122 for adding the life loss data to the cumulative value up to that point.

  This configuration is based on the following idea. First, the main item that determines the life loss in the transformer is the deterioration of the insulating paper between the internal windings. It is known that this deterioration progresses faster as the temperature of the transformer winding in the vicinity of the insulating paper becomes higher, and the progress rate is about doubled every time the temperature rises by 6 degrees. Therefore, when the transformer load factor is increased and the operation becomes a high load operation or an overload operation in some cases, the winding temperature inside the transformer further increases, so that the deterioration of the insulation paper inside the transformer progresses rapidly.

  In addition, the winding temperature varies depending on the location in the transformer, and the insulating paper reaches the end of its service life at the highest temperature in the vicinity of the upper part. Many transformers are designed to have a life of about 30 years when continuously operated at a maximum winding temperature of 95 ° C. This winding maximum point temperature is usually impossible to measure directly with a sensor, etc., but it can also be calculated by using measurement data such as transformer load current, internal oil temperature, ambient temperature, etc. .

[Action]
The transformer life loss calculation processing procedure by the monitoring calculation unit 12A of the present embodiment as described above will be described with reference to the flowchart of FIG. First, the identification unit 120 in the monitoring arithmetic unit 12A identifies the state data S sent from the state data acquisition unit 11 in step 901. In the subsequent step 902, the state data S identified in step 901 is the operational state data of the transformer, specifically, operational data necessary for calculating the winding temperature among the load current, oil temperature or ambient temperature. When it is identified that there is, the process proceeds to step 903, and the load factor calculation unit 124 calculates the load factor of the transformer from the load current.

  Next, proceeding to step 904, the oil temperature calculation unit 125A calculates the oil temperature of the transformer from the load factor and ambient temperature data calculated in the load factor calculation process of step 903. Next, the process proceeds to step 905, where the winding temperature calculation unit 125B uses the load factor calculated in the load factor calculation process in step 903 and the oil temperature calculated in the oil temperature calculation process in step 904 to determine the winding temperature of the transformer. Calculate Next, proceeding to step 906, the life loss calculating unit 126 calculates the life loss of the transformer from the winding temperature calculated by the winding temperature calculation processing of step 905. In step 907, the adding unit 122 adds the life loss data calculated in the life loss calculation process in step 906 to the cumulative value up to that point.

An example of such a life loss calculation method will be described below. That is, the factor that determines the life of the transformer is insulating paper, and its deterioration rate increases as the temperature increases. In general, the life loss _VL of the transformer can be evaluated by the equation (2) known as the 6 ° C. half law as a function of the winding temperature θ.

ここで、上記（３）〜（５）式において、
θ_ｏ：最高油温上昇
θ_ｇ：巻線温度と最高油温の差
θ_ｏＮ：定格負荷時の最高油温上昇
θ_ｇＮ：定格付加時の巻線温度と最高油温の差
Ｒ：負荷損／無負荷損 比 （定格負荷時）
ｍ、ｎ：変圧器の冷却方式により定まる定数
である。 The winding temperature θ in a steady state when operating at a constant load factor can be calculated as _a function of the load factor K and the ambient temperature θa as shown in equations (3) to (5).

Here, in the above formulas (3) to (5),
θ _o : Maximum oil temperature rise θ _g : Difference between winding temperature and maximum oil temperature θ _oN : Maximum oil temperature rise at rated load θ _gN : Difference between winding temperature and maximum oil temperature at rated load R: Load loss / No-load loss ratio (at rated load)
m and n are constants determined by the cooling method of the transformer.

In addition, when load factor K changes, since change of oil temperature takes time, it calculates as what changes with a predetermined | prescribed time constant. In the equipment monitoring device, the load current of the transformer is sampled at a predetermined frequency to obtain an effective value, and the load factor K is calculated. Also to measure ambient temperature theta _a to, (2) seek winding temperature theta by performing computation to (5), to calculate the life loss.

[effect]
According to the present embodiment as described above, in addition to the same effects as those of the first embodiment, the following effects can be obtained. That is, since the life loss can be calculated as data related to the deterioration state of the transformer that is the monitored device U, the deterioration can be predicted and the inspection time can be accurately determined. Therefore, it is possible to rationalize the maintenance and inspection work and improve the economic efficiency of the entire system including the monitored device U.

[Sixth Embodiment]
[Constitution]
A sixth embodiment of the present invention will be described with reference to FIGS. This embodiment is basically the same configuration as the first embodiment. However, the computer program or the arithmetic circuit is configured so that the monitoring arithmetic unit 12B operates according to the processing procedure shown in the flowchart of FIG. That is, in the present embodiment, the monitored device U is assumed to be a transformer of the power system, and the monitored arithmetic unit 12B uses the data from the state data acquisition unit 11 to load the monitored device U, that is, the transformer. The amount of consumption of the switching contact in the tap changer can be monitored.

  More specifically, as shown in FIG. 12, the monitoring calculation unit 12B identifies whether or not the state data S from the state data acquisition unit 11 is operation data of the on-load tap changer of the transformer. 120, a main contact consumption amount calculation unit 127A that calculates the consumption amount of the main contact from the load current value of the transformer when identified as the operation data of the on-load tap changer, and the load current value and tap of the transformer The shunt current value calculation unit 128 that calculates a current value to be shunted to the resistance contact by the step voltage and the switching resistance value, and the resistance contact consumption amount calculation unit that calculates the consumption amount of the resistance contact from the calculated resistance contact shunt current value 127B, and an adder 122 that adds the calculated main contact consumption data and resistance contact consumption data to the accumulated value up to that point.

  This configuration is based on the following idea. First, in an on-load tap changer of a transformer, the amount of consumption of the switching contact is an item that affects the replacement timing of the switching contact. Of the switching contacts, the consumption amount of the main contact can be obtained from the load current value at the time of tap switching, and the consumption amount of the resistance contact can be obtained from the current value diverted to the resistance contact.

[Action]
The switching contact consumption amount calculation processing procedure of the transformer load tap changer by the monitoring calculation unit 12B of the present embodiment as described above will be described with reference to the flowchart of FIG. First, the identification unit 120 in the monitoring calculation unit 12B identifies the state data S sent from the state data acquisition unit 11 in step 111. In the following step 112, when it is determined that the state data S identified by the identification processing in step 111 is the on-load tap changer operation data of the transformer, the process proceeds to step 113, and the main contact consumption amount calculation unit 127A. However, the consumption amount of the main contact in the operation is calculated from the state data S when the tap changer is operated, specifically, the load current value of the transformer.

  Next, the process proceeds to step 114, where the shunt current value calculation unit 128 shunts the resistance contact according to the state data S at the time of the tap switching operation, specifically, the load current value of the transformer, the step voltage between the taps, and the switching resistance value. The current value to be calculated is calculated. Next, the process proceeds to step 115, where the resistance contact consumption amount calculation unit 127B calculates the consumption amount of the resistance contact from the resistance contact shunt current value calculated in the resistance contact shunt current calculation process of step 114. Further, the process proceeds to step 116, where the adding unit 122 obtains the main contact consumption data calculated in the main contact consumption calculation processing in step 113 and the resistance contact consumption data calculated in the resistance contact consumption calculation processing in step 115. Add to the cumulative value up to the point in time.

[effect]
According to the present embodiment as described above, in addition to the same effects as those of the first embodiment, the following effects can be obtained. That is, since the consumption amount of the switching contact of the on-load tap changer of the transformer, which is the monitored device U, can be predicted, the replacement time can be easily confirmed. Therefore, it is possible to rationalize the maintenance and inspection work and improve the economic efficiency of the entire system including the monitored device U.

[Seventh Embodiment]
[Constitution]
A seventh embodiment of the present invention will be described with reference to FIGS. This embodiment is basically the same configuration as the first embodiment. However, the computer program or circuit is configured so that the data storage unit 13 operates according to the processing procedure shown in the flowchart of FIG. In other words, in the present embodiment, the monitored device U is assumed to be a transformer of the power system, and the data storage unit 13 is provided on condition that the load factor calculated by the monitoring calculation unit 12 exceeds a predetermined value. The data X relating to the device operation state calculated by the monitoring calculation unit 12, specifically, the load factor and the winding temperature are stored in a storage medium as time-series data.

  More specifically, as shown in FIG. 14, the data storage unit 13 stores the state data storage unit 130 that stores the state data S from the state data acquisition unit 11 and the monitoring calculation result data from the monitoring calculation unit 12. An operation result storage unit 131 for storing, a load factor confirmation unit 134 for confirming whether or not the load factor of the transformer exceeds a predetermined value, and the load factor and the winding temperature as time-series data in the storage medium And a time-series data storage unit 133 for storing.

[Action]
The monitoring data storage processing procedure in the data storage unit 13 of the present embodiment as described above will be described with reference to the flowchart of FIG. First, in step 1301, the state data storage unit 130 in the data storage unit 13 stores the state data S sent from the state data acquisition unit 11 in a storage medium. In subsequent step 1302, the calculation result storage unit 131 stores the monitoring calculation result data sent from the monitoring calculation unit 12, specifically, the calculation result V related to the load factor, winding temperature, and deterioration state in the storage medium. In subsequent step 1303, the load factor confirmation unit 134 confirms the load factor of the transformer. In step 1304, if it is determined in step 1303 that the load factor exceeds a predetermined value, the process proceeds to step 1305, where the time series data storage unit 133 sets the load factor and the winding temperature in the time series format. The data is stored in the storage medium and the process returns to step 1301. If the condition is not satisfied in step 1304, that is, if the load factor does not exceed a predetermined value, the process returns to step 1301 as it is. The series of processing can be appropriately terminated as necessary.

[effect]
In the present embodiment as described above, during overload operation in which the load factor of the transformer exceeds a predetermined value, it is necessary to acquire particularly detailed data, but even in such a case, the load factor and internal Since the time series data of the winding temperature can be acquired, it is possible to accurately grasp the temporal change of the internal state. Therefore, optimum operation of the transformer and accurate maintenance and inspection work can be performed, and the economic efficiency of the entire system is improved.

[Eighth Embodiment]
[Constitution]
An eighth embodiment of the present invention will be described with reference to FIGS. This embodiment is basically the same configuration as the first embodiment. However, the computer program or the arithmetic circuit is configured so that the data storage unit 13 operates according to the processing procedure shown in the flowchart of FIG. That is, in the present embodiment, the data storage unit 13 includes at least the state data acquired by the state data acquisition unit 11, the calculation result X related to the device operation state calculated by the monitoring calculation unit 12, and the calculation result V related to the deterioration state. One is configured to be stored in a non-volatile storage medium.

  More specifically, the data storage unit 13 mainly stores the state data storage unit 130 that stores the state data S sent from the state data acquisition unit 11 in the main storage medium, and the monitoring calculation result data from the monitoring calculation unit 12. An operation result storage unit 131 that stores data in a storage medium, a data storage period confirmation unit 135 that checks the time that has elapsed since the previous storage in the nonvolatile storage medium, and a predetermined storage that stores data in the nonvolatile storage medium A non-volatile storage medium storage unit 136 that stores monitoring data in a non-volatile storage medium when it is determined that the period of time has elapsed. Moreover, although the processing part which performs the calculation similar to said each embodiment is set to the monitoring calculating part 12, description is abbreviate | omitted.

[Action]
The monitoring data storage processing procedure by the data storage unit 13 of the present embodiment as described above will be described with reference to the flowchart of FIG. First, in step 151, the state data storage unit 130 in the data storage unit 13 stores the state data S sent from the state data acquisition unit 11, specifically the main circuit current data, the auxiliary contact state of the device, etc. Save to In the subsequent step 152, the calculation result storage unit 131 stores the calculation result X related to the device operation state calculated by the monitoring calculation unit 12, specifically, the load factor data of the transformer, the internal winding temperature data, and the like. The calculation result V related to deterioration calculated by the monitoring calculation unit 12 is stored, specifically, the main contact wear amount data of the circuit breaker, the life loss data of the transformer, or the consumption amount data of the switching contact of the tap changer when the transformer is loaded. To do.

  Next, the processing proceeds to step 153, where the data storage cycle confirmation unit 135 confirms the time that has elapsed since the data storage unit 13 previously stored in the nonvolatile storage medium. In step 154, if it is determined in the confirmation processing in step 153 that a predetermined period of time for saving to the non-volatile storage medium has elapsed, the process proceeds to step 155, where the non-volatile storage medium saving unit 136 monitors. Data is stored in a non-volatile storage medium. If the condition is not satisfied in the confirmation process in step 154, that is, if the predetermined period has not elapsed, the process returns to step 151. The series of processing can be appropriately terminated as necessary.

  The time of a predetermined cycle for storing in a nonvolatile storage medium is, when monitoring the operation state of the transformer, during normal operation, the time constant of the change of the internal state of the transformer is about several tens of minutes to several hours, It is effective to set a cycle of about several minutes during overload operation. When monitoring the operating state of the circuit breaker, it is possible to store the circuit breaker only when the circuit breaker operates, not at a fixed period.

[effect]
In the present embodiment as described above, since the monitoring data of the device monitoring device 1 is stored in a nonvolatile storage medium, it can be stored for a long period of time, and when the power supplied to the monitoring device is interrupted However, the disappearance of the monitoring result data can be prevented, and the data storability is improved.

[Ninth Embodiment]
[Constitution]
A ninth embodiment of the present invention will be described with reference to FIGS. The present embodiment is basically the same configuration as the above eighth embodiment. However, in the present embodiment, the transformer of the power system is monitored, and the data storage unit 13 is configured with a computer program or a circuit so as to operate according to the processing procedure shown in the flowchart of FIG. That is, in this embodiment, when storing the calculation result related to the deterioration state of the transformer, specifically, the accumulated value data of the life loss from the start of operation in the nonvolatile storage medium, the calculation result is stored in a predetermined number of digits. It is configured to store as a plurality of divided data divided every time.

  More specifically, as shown in FIG. 18, the non-volatile storage medium storage unit 136 in the data storage unit 13 stores the 0th to n−1th digits of the life loss accumulated value data and the binary number state. A divided data storage unit 136A that sequentially shifts to the n-digit lower side and a digit number determination unit 136B that confirms the number of stored digits are provided.

[Action]
The life loss accumulated value data storage processing procedure by the data storage unit 13 of the present embodiment as described above will be described with reference to the flowchart of FIG. First, the divided data storage unit 136A in the data storage unit 13 stores the 0th to n-1th digits of the lifetime loss accumulated value data in the nonvolatile storage medium in Step 171, and in the subsequent Step 172, the lifetime loss accumulated value. Shift data down n digits in binary state. In step 173, the number of digits stored by the digit number determination unit 136B is confirmed. If it is not determined in step 174 that all digits have been stored, the process returns to step 171 to return to the next digit. Move on to save processing. In step 174, if all the digits have been saved, a series of processing is completed.

[effect]
According to the present embodiment as described above, since the number of digits of individual data can be reduced by dividing the operation result data, data with a very large number of digits, for example, loss of life of the transformer It is possible to save the accumulated value data and the like in a non-volatile storage medium without impairing the number of significant digits. Therefore, the data storability of the device monitoring system can be further improved.

[Other Embodiments]
The present invention is not limited to the embodiment as described above. For example, any known medium can be applied as the storage medium used in the data storage unit. Data used for calculation and data to be stored are not limited to those exemplified in the above embodiment. For example, the data separately stored in the ninth embodiment may be data other than the transformer life loss data. Furthermore, the above-described embodiments can be combined to form a higher-function system. That is, each element which comprises a monitoring calculating part and a data memory | storage part is not exclusive, and can show each effect by combining with each other.

The block diagram which shows the whole structure of 1st Embodiment of the equipment monitoring system of this invention. The block diagram which shows the monitoring calculating part in the 2nd Embodiment of this invention. The flowchart which shows the main contact wear amount calculation processing procedure in embodiment of FIG. Explanatory drawing for showing an example of the contact wear amount calculation method in the embodiment of FIG. The block diagram which shows the monitoring calculating part in the 3rd Embodiment of this invention. Explanatory drawing for showing an example of the calculation method of the opening / closing operation time in the embodiment of FIG. The flowchart which shows the opening / closing operation time calculation processing procedure in embodiment of FIG. The block diagram which shows the data storage part in the 4th Embodiment of this invention 8 is a flowchart showing a monitoring data storage processing procedure in the embodiment of FIG. The block diagram which shows the monitoring calculating part in the 5th Embodiment of this invention The flowchart which shows the transformer lifetime loss calculation processing procedure in embodiment of FIG. The block diagram which shows the monitoring calculating part in the 6th Embodiment of this invention The flowchart which shows the switching contact consumption amount calculation processing procedure of the tap switch at the time of the transformer load in embodiment of FIG. The block diagram which shows the data storage part in the 7th Embodiment of this invention The flowchart which shows the monitoring data preservation | save processing procedure in embodiment of FIG. The block diagram which shows the data storage part in the 8th Embodiment of this invention The flowchart which shows the monitoring data preservation | save processing procedure in embodiment of FIG. The block diagram which shows the non-volatile storage medium preservation | save part in the 9th Embodiment of this invention The flowchart which shows the lifetime loss accumulated value data preservation | save processing procedure in embodiment of FIG. Block configuration diagram showing an example of a conventional device monitoring system Potential degradation failure model diagram showing expected effects in equipment monitoring and maintenance support system

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Device monitoring apparatus 2 ... Terminal 3 ... Communication network 11 ... Status data acquisition part 12, 12A, 12B ... Monitoring calculating part 13 ... Data storage part 14 ... Data communication part 21 ... Data communication part 22 ... Display part 23 ... Input part 24 ... Data processing unit 41 ... Detection device 42 ... Measurement device 43 ... Measurement data collection device 44 ... Display device 45 ... Electricity station monitoring device 120 ... Identification unit 121 ... Amount of wear calculation unit 122 ... Addition unit 123 ... Opening / closing operation time calculation unit 124 ... Load factor calculation unit 125A ... oil temperature calculation unit 125B ... winding temperature calculation unit 126 ... life loss calculation unit 127A ... main contact consumption amount calculation unit 127B ... resistance contact consumption amount calculation unit 128 ... shunt current value calculation unit 130 ... State data storage unit 131 ... operation result storage unit 132 ... identification unit 133 ... time-series data storage unit 134 ... load factor confirmation unit 135 ... data storage cycle confirmation unit 136 ... not Nonvolatile storage medium storage unit 136A ... divided data storage unit 136B ... digits determination unit

Claims (10)

In a device monitoring device that monitors the status of monitored devices installed in electrical stations,
Status data acquisition means for acquiring status data representing the status of the monitored device;
Based on the acquired state data, a monitoring operation means for performing an operation related to the operation state or the deterioration state of the monitored device;
Data storage means for storing at least one of the state data, the operation result data related to the operation state, and the operation result data related to the deterioration state in a storage device;
A device monitoring apparatus comprising: data communication means for transmitting data stored in the storage device via a communication network. The monitored device is a power system circuit breaker,
The state data includes a current value during operation of the circuit breaker,
2. The apparatus monitoring apparatus according to claim 1, wherein the monitoring calculation means includes a wear amount calculating means for calculating a wear amount of a main contact of the circuit breaker based on the energization current value. The monitored device is a power system circuit breaker,
The state data includes at least one of trip current data of a circuit breaker, closing current data, and opening / closing state data of an auxiliary contact,
2. The device monitoring apparatus according to claim 1, wherein the monitoring calculation unit includes an opening / closing operation time calculating unit that calculates an opening / closing operation time of the circuit breaker based on the state data. The monitored device is a power system circuit breaker,
The data storage means is an identification means for identifying whether or not the state data includes circuit breaker operation data, and when the operation data is identified by the identification means, the state data is converted into time-series data. The device monitoring apparatus according to claim 1, further comprising time-series data storage means for storing in a storage device. The monitored device is a power system transformer,
The state data includes at least one of transformer load current data, transformer internal oil temperature data, and ambient temperature data of the transformer,
The monitoring calculation means includes a load factor calculation means for calculating a load factor of the transformer based on the state data, a winding temperature calculation means for calculating a winding temperature of the transformer based on the state data, and the winding The equipment monitoring apparatus according to claim 1, further comprising a life loss calculating means for calculating a life loss of the transformer based on the line temperature. The monitored device is a power system transformer,
The state data includes transformer load current data;
2. The apparatus according to claim 1, wherein the monitoring calculation means includes switching contact consumption amount calculation means for calculating a consumption amount of the switching contact of the on-load tap changer of the transformer based on the load current data. Monitoring device. The monitored device is a power system transformer,
The data storage means includes a load factor confirmation means for confirming whether or not the load factor of the transformer exceeds a predetermined value, and the monitoring calculation means when it is confirmed that the load factor exceeds a predetermined value. The device monitoring apparatus according to claim 1, further comprising: time-series data storage means for storing data calculated by the computer in a time-series format in a storage device.   The said storage device has a non-volatile storage medium which preserve | saves at least one among the said state data, the calculation result data regarding the said operation state, and the calculation result data regarding the said deterioration state, And the device monitoring apparatus according to any one of 7 above. The monitored device is a power system transformer,
9. The data storage unit includes a divided data storage unit that stores, in the nonvolatile storage medium, a plurality of divided data obtained by dividing the calculation result data related to the deterioration state by a predetermined number of digits. The equipment monitoring device described in 1. In a device monitoring system that monitors the status of monitored devices installed in electrical stations,
Status data acquisition means for acquiring status data representing the status of the monitored device;
Based on the acquired state data, a monitoring operation means for performing an operation related to the operation state or the deterioration state of the monitored device;
Data storage means for storing at least one of the state data, the operation result data related to the operation state, and the operation result data related to the deterioration state in a storage device;
Data transmission means for transmitting data stored in the storage device via a communication network;
Data receiving means for receiving data stored in the storage device via a communication network;
A device monitoring system comprising data display means for displaying data received by the data receiving means.

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