KR102490137B1 - Life prediction system for high voltage transformer - Google Patents

Abstract

The present invention relates to a lifespan prediction system for a high-voltage transformer. The lifespan prediction system for a high-voltage transformer, which can prevent an accident caused by a breakdown, may include: a transformer information detection terminal which is installed in each of a plurality of transformers to detect state information of each transformer and optically detects a winding temperature and a degree of deterioration of insulation oil; an information collection server which receives information detected in the transformer information detection terminal; a database server which stores the information collected in the information collection server; a diagnosis server which diagnoses a state of each transformer and evaluates soundness thereof by using the information stored in the database server and stores an evaluation result in the database server; and an information provision server which posts and publishes transformer state information and diagnosis information stored in the database server on a web or mobile web.

Description

Life prediction system for high voltage transformer}

The present invention relates to a system for predicting the life of a high voltage transformer, and more particularly, to a system for predicting the life through optical fusion-based winding temperature measurement and deterioration of insulating oil.

With the domestic industrial development, electricity usage has increased, and since the late 1960s, large-scale electrical facilities such as power transformers and circuit breakers have been continuously expanded in industries. Since these existing power facilities have been used for a long period of time, their deterioration is conspicuous at present.

In particular, since stable power supply has become an important requirement according to the recent automation and advancement of industrial facilities, the management of old power facilities is considered very important in terms of preventing economic losses and industrial safety accidents that may occur when power supply is interrupted. .

Electric power facilities are generally expensive and large in size, so replacement costs are very high, and a long time and a lot of manpower are required for operation. In addition, since most of the facilities must be individually designed and manufactured for each purpose, if planned progress is not made for several years, enormous losses may occur due to production disruptions, and the ramifications for social stability, such as large-scale power outages, may occur. to the level of threat.

Recently, electricity consumption is rapidly increasing due to the increase in electricity use information processing facilities and convenience facilities such as cooling loads and computers, and this phenomenon is appearing in the expansion of overloaded areas and areas with intensified load concentration.

Because of this, the load capacity of the pole and ground transformers located at the end of the system increases irregularly, and the transformer frequently suffers from insulation breakdown due to deterioration due to overload and deterioration caused by the external environment.

Transformers are in charge of important functions related to the stable supply of power, and therefore require higher reliability than any other power equipment. Therefore, in order to prevent such a transformer accident in advance, the development of a new concept of fault diagnosis method for detecting and resolving an abnormality in a transformer is urgently required.

In addition, the high voltage transformer is required to be replaced when an abnormality is discovered through periodic inspection.

In Registered Patent No. 10-2366922 (Registered on February 21, 2022, Deterioration Prediction System for Heavy Electric Equipment Based on Time-series Insulation Diagnosis Information and Its Method), devices with similar manufacturing times are grouped using insulation diagnosis information and replaced when deterioration occurs. A technique for performing is described.

However, this conventional method has a problem in that it uses only insulation diagnosis results and cannot inspect deterioration of various elements constituting the high voltage transformer.

In particular, there is a demand for the development of specific means capable of evaluating the deterioration of the contact of the high voltage transformer and the deterioration of the thermal oil.

In view of the above problems, an object of the present invention is to provide a system capable of determining an individual replacement time of a high voltage transformer by detecting the degree of deterioration of the contact point of the high voltage transformer and the thermal oil.

The system for predicting the life of a high-voltage transformer of the present invention to solve the above technical problem is a transformer information detection terminal installed in each of a plurality of transformers to detect state information of the transformer and optically detecting the winding temperature and the degree of deterioration of insulating oil. An information collection server for receiving the information detected by the transformer information detection terminal, a database server for storing the information collected by the information collection server, and diagnosis and soundness of each transformer using the information stored in the database server It may include a diagnosis server that evaluates and stores the evaluation result in the database server, and an information providing server that posts and discloses the status information and diagnosis information of the transformer stored in the database server on the web or mobile web.

In an embodiment of the present invention, the information detected by the transformer information detection terminal may be winding temperature, insulating oil turbidity, gas in oil, bushing, state of voltage regulator, and partial discharge information.

In an embodiment of the present invention, the information detected by the transformer information detection terminal may further include the type and concentration of gas in oil, state information of lightning arresters, and noise information.

In an embodiment of the present invention, the transformer information detection terminal includes an insulating oil optical characteristic analyzer that analyzes chromaticity of insulating oil using light and gas in oil using an optical filter, and light according to temperature through a heat-sensitive glass. A winding optical characteristic analyzer that indirectly detects the winding temperature using the difference in transmittance, a voltage detector that detects the voltage of the transformer and compares the setting of the voltage regulator with the actual voltage to check the state information of the voltage regulator, A partial discharge detection unit that detects the occurrence of partial discharge by detecting pulses or ultrasonic waves, and a communication unit that transmits detection results of the insulating oil optical characteristics analysis unit, winding optical characteristics analysis unit, voltage detection unit, and partial discharge detection unit to the information collection server. can include

In an embodiment of the present invention, the transformer information detection terminal includes a noise detector for detecting noise inside the transformer, a gas detector for detecting the type and concentration of gas in oil in insulating oil, and an arrester detector for detecting state information of the arrester. can include more.

In an embodiment of the present invention, the diagnosis server may diagnose operating environment, mechanical risk, thermal risk, electrical risk, insulator deterioration, lightning arrester risk, and chemical risk in addition to the transformer information stored in the database server.

In an embodiment of the present invention, the operating environment information may include an accident history of the high voltage transformer, years of use, and an installation location classified as indoor or outdoor.

In an embodiment of the present invention, the mechanical risk may be determined using the abnormal noise, presence or absence of abnormal vibration noise, and noise caused by excitation current detected by the noise detection unit.

In an embodiment of the present invention, the thermal risk may be determined according to the type and concentration of gas in oil detected by the gas detection unit, as well as using winding temperature information and chromaticity and turbidity of insulating oil.

In an embodiment of the present invention, the degree of electrical hazard may be determined according to a result of detecting a state of a partial discharge or an insulator.

In an embodiment of the present invention, the lightning arrestor risk may be determined according to the number of times the lightning arrester is operated, leakage current and power detected by the lightning arrester detection unit, or whether or not the leakage current reference value is exceeded.

The present invention detects the winding temperature of the transformer, insulating oil turbidity, gas in oil, bushing, state of the voltage regulator, and partial discharge, predicts the life of the transformer using this, and determines replacement or repair according to the predicted life. Thus, there is an effect of preventing an accident due to a failure.

1 is a block diagram of a life prediction system of a high voltage transformer according to a preferred embodiment of the present invention.
2 is a block diagram of a transformer information detection terminal.
3 is a configuration diagram of another embodiment of a transformer information detection terminal.

In order to fully understand the configuration and effects of the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and may be implemented in various forms and various changes may be made. However, the description of the present embodiment is provided to complete the disclosure of the present invention and to completely inform those skilled in the art of the scope of the invention to which the present invention belongs. In the accompanying drawings, the size of the components is enlarged from the actual size for convenience of description, and the ratio of each component may be exaggerated or reduced.

Terms such as 'first' and 'second' may be used to describe various elements, but the elements should not be limited by the above terms. The above terms may only be used for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a 'first element' may be named a 'second element', and similarly, a 'second element' may also be named a 'first element'. can Also, singular expressions include plural expressions unless the context clearly indicates otherwise. Terms used in the embodiments of the present invention may be interpreted as meanings commonly known to those skilled in the art unless otherwise defined.

1 is a block diagram of a life prediction system of a high voltage transformer according to a preferred embodiment of the present invention.

Referring to FIG. 1, the present invention provides a data collection server (20) for receiving information on winding temperature, insulating oil turbidity, gas in oil, bushing, voltage regulator state, and partial discharge of a transformer detected by a transformer information detection terminal (10). And, the database server 30 for storing the data collected by the data collection server 20, and the degree of deterioration of the high voltage transformer is diagnosed using the data stored in the database server 30, and the database server 30 It is configured to include a diagnostic server 40 that stores in the database server 30 and an information providing server 50 that posts and discloses information stored in the database server 30 on the web or mobile web.

Hereinafter, the configuration and operation of the system for predicting the life of a high voltage transformer according to the present invention configured as described above will be described in detail.

First, the data collection server 20 communicates with a communication device installed in the transformer and collects various information detected in the transformer. The data collection server 20 is installed remotely and communicates with a plurality of transformers to collect data.

2 is a block diagram of the transformer information detection terminal 10.

Referring to FIG. 2, the transformer information detection terminal 10 includes an insulating oil optical characteristic analysis unit 11, a winding optical characteristic analysis unit 12, a voltage detection unit 13, a partial discharge detection unit 14, and a communication unit 16. can be configured.

The insulating oil optical characteristic analysis unit 11 may perform analysis of chromaticity of insulating oil using light refraction and gas in oil using an optical filter.

The winding optical characteristic analysis unit 12 indirectly detects heat by using the difference in light transmittance according to temperature through the medium of the heat-sensitive glass. It can be done by detecting the temperature.

In addition, the winding optical characteristic analysis unit 12 may also detect the temperature of the junction.

The winding optical characteristic analyzer 12 may have a temperature measurement range of -30 to 230°C, and a temperature measurement resolution of 0.1°C.

The voltage detector 13 detects the voltage of the transformer and compares the setting of the voltage regulating device with the actual voltage to check state information of the voltage regulating device.

The partial discharge detection unit 14 detects electric pulses or ultrasonic waves to detect partial discharge.

The detection results of the insulating oil optical characteristic analyzer 11, the winding optical characteristic analyzer 12, the voltage detector 13, and the partial discharge detector 14 are provided to the collection server 20 through the communication unit 16.

3 is a block diagram of another embodiment of a transformer information detection terminal 10 according to another embodiment of the present invention.

Referring to FIG. 3 , in addition to the configuration of FIG. 2 , a noise detection unit 17 , a gas detection unit 18 , and a lightning arrestor detection unit 15 may be further included.

The noise detection unit 17 measures noise generated from the high voltage transformer due to vibration or the like.

Also, the gas detection unit 18 detects gas in oil. Gases in oil can present thermal or chemical hazards depending on their composition.

The arrester detection unit 15 may detect the number of operations of the arrester and the leakage current.

The communication unit 16 includes the turbidity of the insulating oil detected through the optical characteristics analysis unit 11 of the insulating oil, gas information in oil, winding temperature information detected through the optical characteristics analysis unit 12, and voltage detected through the voltage detection unit 13. It is assumed that the state information of the voltage regulator and the partial discharge information detected through the partial discharge detection unit 14 are transmitted.

The communication unit 16 transmits the information detected by the transformer information detection terminal 10 to the information collection server 20 using a wireless or wired communication method.

The transformer information detection terminal 10 stores the received information of the transformer information detection terminal 10 in the database server 30, and inserts and stores the identifier of each transformer information detection terminal 10.

The database server 30 stores the information detected by the transformer information detection terminal 10 in accordance with database rules, and provides the information when there is an authorized request.

The diagnosis server 40 may perform a set diagnosis algorithm and request information of a specific transformer from the database server 30 . According to the request of the diagnosis server 40, the database server 30 provides information on winding temperature of a specific transformer, insulating oil turbidity, gas in oil, bushing, state of voltage regulator, and partial discharge.

The diagnostic server 40 performs a diagnostic algorithm using the received winding temperature, insulating oil turbidity, gas in oil, bushing, state of the voltage regulator, and partial discharge information to diagnose life information and failure information of the corresponding transformer. do.

Diagnosis results are stored in the database server 30 again.

As such, the database server 30 stores the information detected by the transformer and diagnosis result information, and the database server 30 provides the information detected by the transformer and diagnosis result upon request.

In particular, the diagnosis server 40 may perform a risk analysis of the transformer to evaluate the health.

Specifically, the diagnosis server 40 may diagnose the operating environment, mechanical risk, thermal risk, electrical risk, insulator deterioration, lightning arrester risk, and chemical risk in addition to the transformer information stored in the database server 30.

Operating environment information may include accident history, years of use, and installation location of the high voltage transformer. The installation location may be classified indoors or outdoors.

As for the mechanical risk, the soundness of the mechanical risk of the high voltage transformer is evaluated using the abnormal noise, presence or absence of abnormal vibration, and noise caused by excitation current detected by the noise detection unit 17 above.

Soundness may be evaluated according to the level of the noise detected by the noise detection unit 17 by setting a standard decibel noise standard for each type of noise.

In addition, the thermal risk can be evaluated using the previously detected winding temperature information and the chromaticity and turbidity of the insulating oil, as well as the thermal risk according to the type and concentration of gas in oil detected by the gas detection unit 18.

For example, when the concentrations of ethylene, ethane, propane, and methane are higher than a set concentration, soundness can be low.

In this case, the set concentration may include a plurality of reference values.

If the gas in oil detected by the gas detection unit 18 contains water and the concentration of water is higher than the reference value, the chemical risk may be high. In addition, the acid value of the insulating oil is measured, and if it is higher than the standard value, the chemical risk can be considered high.

The level of electrical risk is evaluated according to the result of partial discharge and insulator state detection described above.

In addition, the lightning arrestor risk level may be evaluated according to the number of operations of the arrester detected by the arrester detection unit 15, the number of leakage current and power set, or whether or not the leakage current reference value is exceeded.

The information provision server 50 detects the winding temperature, insulating oil turbidity, gas in oil, bushing, state of the voltage regulator, partial discharge information and diagnosis of each transformer detected by the transformer stored in the database server 30 on a web or mobile web page. By posting the results, you can provide information about each of the transformers.

This information can be checked after connecting to a web or mobile web page provided by the information providing server 50 using a terminal of a maintenance manager or manager of the transformer.

Embodiments according to the present invention have been described above, but these are merely examples, and those skilled in the art will understand that various modifications and embodiments of equivalent range are possible therefrom. Therefore, the true technical protection scope of the present invention should be defined by the following claims.

10: transformer information detection terminal 20: information collection server
30: database server 40: diagnosis server
50: information provision server

Claims (11)

A transformer information detection terminal installed in each of a plurality of transformers to detect state information of the transformer, and optically detecting winding temperature and insulating oil deterioration degree;
an information collection server receiving the information detected by the transformer information detection terminal;
a database server for storing the information collected by the information collection server;
a diagnosis server for diagnosing and evaluating the health of each transformer using the information stored in the database server, and storing the evaluation results in the database server; and
Including an information providing server that publishes and discloses the state information and diagnosis information of the transformer stored in the database server on the web or mobile web,
The transformer information detection terminal,
An insulating oil optical characteristic analysis unit that performs analysis of chromaticity of insulating oil using light refraction and gas in oil using an optical filter;
A winding optical characteristic analyzer for indirectly detecting a winding temperature using a difference in light transmittance according to temperature through a thermally sensitive glass;
a voltage detection unit that detects the voltage of the transformer and compares the set voltage of the voltage regulating device with the actual voltage to check state information of the voltage regulating device;
a partial discharge detection unit that detects whether a partial discharge has occurred by detecting an electric pulse or an ultrasonic wave;
a noise detector for detecting noise inside the transformer;
A gas detection unit for detecting the type and concentration of gas in the oil in the insulating oil;
Lightning arrester detection unit for detecting the number of times the lightning arrester operates and the leakage current; and
A communication unit for transmitting the detection results of the insulating oil optical characteristics analysis unit, the winding optical characteristics analysis unit, the voltage detection unit, the partial discharge detection unit, the noise detection unit, the gas detection unit, and the lightning arrester detection unit to the information collection server,
The diagnostic server,
In addition to the transformer information stored in the database server, operating environment information, mechanical risk, thermal risk, electrical risk, insulation deterioration, arrester risk, and chemical risk are diagnosed.
The operating environment information includes the accident history of the high voltage transformer, the number of years of use, and the installation location classified as indoor or outdoor,
The mechanical risk is determined by using the abnormal noise detected by the noise detection unit, the presence or absence of abnormal vibration noise, and the noise caused by the excitation current,
The thermal risk is determined according to the type and concentration of the gas in the oil detected by the gas detection unit as well as using the winding temperature information and the chromaticity and turbidity of the insulating oil,
The electrical hazard is determined according to the detection result of partial discharge and insulator state,
The lightning arrester risk is determined according to the number of operations of the arrester detected by the arrester detection unit, the number of leakage current and power set, or whether or not the leakage current reference value is exceeded.

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