CN103713187B - A kind of distributing transformer monitoring device - Google Patents
A kind of distributing transformer monitoring device Download PDFInfo
- Publication number
- CN103713187B CN103713187B CN201310755615.0A CN201310755615A CN103713187B CN 103713187 B CN103713187 B CN 103713187B CN 201310755615 A CN201310755615 A CN 201310755615A CN 103713187 B CN103713187 B CN 103713187B
- Authority
- CN
- China
- Prior art keywords
- distribution transformer
- temperature
- detection unit
- voltage
- monitoring device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000012806 monitoring device Methods 0.000 title claims abstract description 27
- 238000009826 distribution Methods 0.000 claims abstract description 131
- 238000005070 sampling Methods 0.000 claims abstract description 55
- 238000001514 detection method Methods 0.000 claims abstract description 47
- 230000006854 communication Effects 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 12
- 230000015654 memory Effects 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 8
- 238000002955 isolation Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 26
- 238000004088 simulation Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 14
- 238000004364 calculation method Methods 0.000 description 13
- 238000005259 measurement Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000013500 data storage Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The embodiment of the invention discloses a kind of distributing transformer monitoring device, including: voltage detection unit, for measuring the three-phase voltage analogue signal obtaining distribution transformer；Current detecting unit, for measuring the three-phase current analogue signal obtaining each duplexure of distribution transformer；Temperature detecting unit, for measuring running temperature analogue signal and the environment temperature simulation signal obtaining distribution transformer；The sampling A/D chip being connected with described temperature detecting unit, described voltage detection unit and described current detecting unit respectively, for the analogue signal received is processed, obtain the network load parameters number signal of each phase line of running temperature digital signal, ambient temperature digital signal and each duplexure；And the microcontroller being connected with described sampling A/D chip, for the above-mentioned digital signal read is converted to corresponding actual value, to realize running temperature, temperature rise situation and the on-line monitoring of branch's sharing of load situation thereof to distribution transformer.
Description
Technical Field
The invention relates to the technical field of temperature monitoring and power load monitoring, in particular to a monitoring device for a distribution transformer.
Background
When the operating temperature and/or the temperature rise of the distribution transformer exceed/exceeds the limit, the over-temperature burning accident of the distribution transformer is very easy to happen, so when the potential safety hazards such as the exceeding of the operating temperature and/or the temperature rise are found, partial load of the distribution transformer needs to be cut off in time to avoid the over-temperature burning accident; in addition, in the operation process of the distribution transformer, if the load (i.e., branch load) borne by each branch loop of the distribution transformer is seriously unbalanced, the safe and economic operation of the distribution network is affected.
Therefore, it is necessary to monitor the operating temperature, the temperature rise condition and the branch load distribution condition of the distribution transformer on line, so that when the potential safety hazards such as over-limit of the operating temperature, over-limit of the temperature rise and the like and/or the phenomenon of serious imbalance of branch load distribution of the distribution transformer are found, corresponding measures can be taken to regulate and control the operating condition of the distribution transformer in time, thereby avoiding the distribution transformer from being burnt due to over-temperature and ensuring safe and economic operation of the distribution network.
Disclosure of Invention
In view of this, the present invention provides a distribution transformer monitoring device to realize online monitoring of the operating temperature, temperature rise condition and branch load distribution condition of a distribution transformer.
A distribution transformer monitoring device, comprising:
the voltage detection unit is used for measuring and obtaining three-phase voltage analog signals of the distribution transformer;
the current detection unit is used for measuring and obtaining three-phase current analog signals of each branch loop of the distribution transformer;
the temperature detection unit is used for measuring and obtaining an operating temperature analog signal of the distribution transformer and an environment temperature analog signal of the environment where the distribution transformer is located;
the sampling chips are respectively connected with the temperature detection unit, the voltage detection unit and the current detection unit and are used for processing the received analog signals to obtain an operating temperature digital signal, an environment temperature digital signal and a power grid load parameter digital signal of each phase line of each branch loop;
and the microcontroller is connected with the sampling chip and is used for processing the read digital signals to obtain an actual operating temperature value, an actual environment temperature value and an actual power grid load parameter of each phase line of each branch loop.
Wherein the voltage detection unit includes:
the first voltage transformer is used for measuring and obtaining an A-phase voltage analog signal of the distribution transformer;
the second voltage transformer is used for measuring and obtaining a B-phase voltage analog signal of the distribution transformer;
and the third voltage transformer is used for measuring and obtaining a C-phase voltage analog signal of the distribution transformer.
Wherein the current detection unit includes: and the current transformers are respectively arranged on different phase lines of different branch loops of the distribution transformer.
The sampling chip comprises a branch loop sampling chip and a temperature sampling chip.
Wherein the branch loop sampling chip and/or the temperature sampling chip comprise CS5463 chips.
Wherein the temperature detection unit comprises a PT100 temperature sensor; wherein the PT100 temperature sensor comprises a two-wire system PT100 temperature sensor.
Wherein the microcontroller comprises an STM32F103 family microcontroller.
Optionally, the distribution transformer monitoring apparatus further comprises: the communication module is connected between the microcontroller and the power distribution terminal and is used for outputting the actual operation temperature value, the actual environment temperature value and the actual power grid load parameter of each phase line of each branch loop to the power distribution terminal; wherein the communication module comprises an isolation type RS485 communication module.
Optionally, the distribution transformer monitoring apparatus further comprises: the storage module is connected with the microcontroller and is used for storing the actual operation temperature value, the actual environment temperature value and the actual power grid load parameter of each phase line of each branch loop; wherein the memory module comprises a ferroelectric memory FRAM.
Optionally, the distribution transformer monitoring apparatus further comprises: the indication module is connected with the microcontroller; the indicating module is used for indicating the operation condition of the distribution transformer monitoring device.
According to the technical scheme, the output signals of the voltage and current detection units are comprehensively processed through the sampling chip to obtain the power grid load parameter digital signals of each phase line of each branch loop, and the output signals of the temperature detection units are processed through the sampling chip to obtain the operating temperature digital signals and the environment temperature digital signals; and finally, reading the digital signal by a microcontroller and converting the digital signal into a corresponding actual value. The difference between the actual operation temperature value and the actual environment temperature value is the temperature rise of the distribution transformer, so that the working personnel can realize the online monitoring of the operation temperature and the temperature rise condition of the distribution transformer according to the actual operation temperature value and the actual environment temperature value output by the microcontroller; meanwhile, the staff can calculate the power load respectively borne by each branch loop by analyzing the actual power grid load parameter of each phase line of each branch loop output by the microcontroller, so that the online monitoring of the branch load distribution condition of the distribution transformer is realized.
Based on the method, when the working personnel find that the distribution transformer has potential safety hazards such as over-limit operation temperature, over-limit temperature rise and the like and/or the phenomenon of serious unbalanced branch load distribution, corresponding measures can be taken in time to regulate and control the operation condition of the distribution transformer, so that the distribution transformer is prevented from being burnt due to over-temperature, and the safe and economic operation of the distribution network is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a distribution transformer monitoring apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another distribution transformer monitoring apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another distribution transformer monitoring device disclosed in the second embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention discloses a distribution transformer monitoring device to realize online monitoring of an operating temperature, a temperature rise condition and a branch load distribution condition of a distribution transformer, including: a voltage detection unit 100, a current detection unit 200, a temperature detection unit 300, a sampling chip 400, and a microcontroller 500.
The voltage detection unit 100 is configured to measure and obtain three-phase voltage analog signals of the distribution transformer.
And the current detection unit 200 is used for measuring and obtaining three-phase current analog signals of each branch loop of the distribution transformer.
And the temperature detection unit 300 is configured to obtain an operating temperature analog signal of the distribution transformer and an environment temperature analog signal of the environment where the distribution transformer is located through measurement.
For the oil-immersed distribution transformer, the operating temperature analog signal is specifically an oil temperature analog signal of the oil-immersed distribution transformer.
The sampling chip 400 is connected to the voltage detection unit 100, the current detection unit 200, and the temperature detection unit 300, respectively, and is configured to process the received analog signals to obtain an operating temperature digital signal, an ambient temperature digital signal, and a power grid load parameter digital signal of each phase line of each branch circuit.
Specifically, the sampling chip 400 performs analog-to-digital conversion on the received operating temperature analog signal and the received environment temperature analog signal to obtain the operating temperature digital signal and the environment temperature digital signal; and simultaneously carrying out analog-to-digital conversion and calculation on the received three-phase voltage analog signals of the distribution transformer and the three-phase current analog signals of each branch loop of the distribution transformer to obtain a power grid load parameter digital signal of each phase line of each branch loop.
Wherein the grid load parameters may include voltage, current, active power, reactive power, apparent power, power factor, and the like.
The microcontroller 500 is connected to the sampling chip 400, and is configured to process the read digital signal to obtain an actual operating temperature value, an actual environment temperature value, and an actual grid load parameter of each phase line of each branch circuit.
And the difference between the actual operation temperature value and the actual environment temperature value is the temperature rise of the distribution transformer.
Specifically, in the working process of the distribution transformer temperature device, the microcontroller 500 performs initialization configuration on the sampling chip 400, monitors the running state of the sampling chip 400 in real time, and prompts the microcontroller 500 that data to be read is ready after the sampling and calculation of the sampling chip 400 are completed, and at the moment, the microcontroller 500 reads a digital signal processed by the sampling chip 400 and performs corresponding conversion to obtain a corresponding actual value; therefore, the working personnel can realize the on-line monitoring of the operating temperature and the temperature rise condition of the distribution transformer according to the actual operating temperature value and the actual environment temperature value output by the microcontroller 500; meanwhile, the staff can calculate the power load respectively borne by each branch circuit by analyzing the actual power grid load parameter of each phase line of each branch circuit output by the microcontroller 500, thereby realizing the online monitoring of the branch load distribution condition of the distribution transformer.
The following further explains the components of the distribution transformer monitoring apparatus according to the first embodiment:
1) voltage detection unit 100
The voltage detection unit 100 of the first embodiment includes three voltage transformers; the single voltage transformer is used for correspondingly measuring to obtain a single-phase voltage analog signal of the distribution transformer;
specifically, the voltage detection unit 100 includes:
the first voltage transformer is used for measuring and obtaining an A-phase voltage analog signal of the distribution transformer;
the second voltage transformer is used for measuring and obtaining a B-phase voltage analog signal of the distribution transformer;
and the third voltage transformer is used for measuring and obtaining a C-phase voltage analog signal of the distribution transformer.
Because the branch loops of the distribution transformer are connected in parallel, the voltage values of the same phase lines of the branch loops are equal, and at the moment, the three-phase voltage analog signal of any branch loop of the distribution transformer is obtained through measurement, so that the three-phase voltage analog signal of each branch loop of the distribution transformer can be obtained.
More specifically, the voltage transformer may be preferably a current-type voltage transformer;
according to different purposes of the voltage transformer, the voltage transformer can be divided into a voltage transformer for protection and a voltage transformer for measurement. The voltage transformer for measurement is used for measuring the voltage information of the power transmission line when the power grid is normally powered. The voltage transformer 100 in the first embodiment is a voltage transformer for measurement, and is preferably a current-type voltage transformer with strong interference resistance, so as to ensure the accuracy of the measurement result.
2) With respect to the current detection unit 200
The current detecting unit 200 according to the first embodiment includes: the current transformers are respectively arranged on different phase lines of different branch loops of the distribution transformer; the total number of the current transformers is 3 times of the total number of the branch circuits; and one voltage transformer is used for measuring and obtaining a single-phase current analog signal of one branch loop of the distribution transformer.
More specifically, the current transformer is a current transformer for measurement.
According to different purposes of the current transformer, the current transformer can be divided into a current transformer for protection and a current transformer for measurement; the current transformer for measurement is used for measuring current information of the power transmission line when the power grid is normally powered.
3) With respect to the temperature detecting unit 300
The temperature detection unit 300 includes a first temperature sensor for measuring the operating temperature analog signal and a second temperature sensor for measuring the environment temperature analog signal.
The first temperature sensor and the second temperature sensor are preferably PT100 temperature sensors. The PT100 temperature sensor is packaged by a stainless steel sleeve, so the temperature sensor is durable, in addition, the appearance is small and exquisite, and the sizes of various probes are selectable, so the temperature sensor is economical, practical and wide in application range, and has the advantages of vibration resistance, good stability, high accuracy, high pressure resistance, high sensitivity and the like; more importantly, the PT100 temperature sensor is manufactured according to IEC751 international standard and is fixed by movable screws, so that plug and play can be realized, and the temperature detection operation is simple and convenient;
more specifically, the first temperature sensor and the second temperature sensor may adopt a two-wire PT100 temperature sensor;
PT100, a platinum thermistor in the PT100 temperature sensor. According to different connection methods of lead lines of the PT100, the PT100 temperature sensor can be divided into a two-wire system PT100 temperature sensor, a three-wire system PT100 temperature sensor, a four-wire system PT100 temperature sensor and the like; as the wire system increases, the measurement accuracy of the PT100 temperature sensor gradually increases, but accordingly, the wiring complexity thereof also gradually increases, and in this case, the two-wire PT100 temperature sensor is preferred in this embodiment in consideration that the two-wire PT100 temperature sensor satisfies the measurement accuracy required in this embodiment and the wiring method thereof is the simplest.
4) With respect to the sampling chip 400
The sampling chip 400 comprises a branch loop sampling chip and a temperature sampling chip;
the existing branch loop sampling chip comprises a single-phase electric energy metering chip, a three-phase electric energy metering chip and the like. Compared with the single-phase electric energy metering chip, although the three-phase electric energy metering chip has the advantages of simpler calculation and higher calculation accuracy, the production cost is relatively higher, and more chip pins are not beneficial to the layout and routing of a Printed Circuit Board (PCB), so that the single-phase electric energy metering chip is preferably used as the branch loop sampling chip in terms of cost saving, simple structure and easy popularization and application;
the number of the single-phase electric energy metering chips is equal to that of the current transformers; the single-phase electric energy metering chip is used for synchronously sampling and calculating voltage and current analog signals of the same phase line of the same branch circuit to obtain a digital quantity of a power grid load parameter of the phase line of the branch circuit;
in practical application, the single-phase electric energy metering chip and/or the temperature sampling chip can be preferably a CS5463 chip;
the CS5463 chip has the characteristics of high cost performance, low power consumption, high sampling precision and the like. Moreover, because the CS5463 chip at least includes two analog-to-digital conversion channels, in the first embodiment, the purpose of simultaneously sampling the voltage analog signal and the current analog signal can be achieved by respectively connecting the voltage transformer and the current transformer corresponding to the same phase line of the same branch circuit to the two analog-to-digital conversion channels of the CS5463 chip, so that the sampling time of the voltage signal and the current signal on the same phase line of the same branch circuit is the same, and delay or error in calculation of the grid load parameter information due to sampling delay of a certain sampling value is avoided; meanwhile, the first temperature sensor and the second temperature sensor are respectively connected to two analog-to-digital conversion channels of the CS5463 chip, so that synchronous sampling of the operating temperature analog signal and the environment temperature analog signal can be realized, the same sampling time of the operating temperature and the environment temperature is ensured, and delay or error in calculation of a temperature rise value caused by sampling delay of a certain temperature value is avoided.
5) With respect to microcontroller 500
Microcontroller 500 may employ an STM32F103 series microcontroller;
the STM32F103 series microcontroller is a 32-bit standard RISC (Reduced Instruction Set Computer) processor based on an ARMv7-M system structure, and is used as a latest generation embedded ARM processor, the performance index of the STM32F103 series microcontroller is far better than that of a traditional 51 series single chip microcomputer, but the development and use method of the microcontroller is as simple as that of the 51 series single chip microcomputer. And the abundant on-chip resources make the STM32F103 series microcontroller easier to upgrade and extend in the future.
Distribution transformers are typically provided with 2-4 branch circuits, of which 2 are most common. Therefore, in the first embodiment, a distribution transformer having 2 branch loops is used as a monitoring object, and the structure and function of the distribution transformer monitoring device are further described. The method comprises the following specific steps:
setting 2 branch loops of the distribution transformer as a first branch loop and a second branch loop respectively; given that the three-phase transmission lines of the distribution transformer are the a-phase line, the B-phase line and the C-phase line, respectively, referring to fig. 2, the distribution transformer monitoring apparatus includes:
a voltage detection unit comprising: a first voltage transformer 100A, a second voltage transformer 100B and a third voltage transformer 100C which are respectively applied to A, B, C phase lines;
a current detection unit comprising: a first current transformer 2001A applied to the a-phase line of the first branch circuit, a second current transformer 2001B applied to the B-phase line of the first branch circuit, and a third current transformer 2001C applied to the C-phase line of the first branch circuit; a fourth current transformer 2002A applied to the a-phase line of the second branch circuit, a fifth current transformer 2002B applied to the B-phase line of the second branch circuit, and a sixth current transformer 2002C applied to the C-phase line of the second branch circuit;
a branching loop sampling chip comprising: the first single-phase electric energy metering chip 3001A applied to the phase line A of the first branch circuit, the second single-phase electric energy metering chip 3001B applied to the phase line B of the first branch circuit, and the third single-phase electric energy metering chip 3001C applied to the phase line C of the first branch circuit; a fourth single-phase electric energy metering chip 3002A applied to the phase line a of the second branch circuit, a fifth single-phase electric energy metering chip 3002B applied to the phase line B of the second branch circuit, and a sixth single-phase electric energy metering chip 3002C applied to the phase line C of the second branch circuit;
the system comprises a microcontroller 500, a first temperature sensor X for measuring to obtain an operating temperature analog signal, a second temperature sensor Y for measuring to obtain an environment temperature analog signal, a temperature sampling chip Z and a temperature sensor; wherein:
the first single-phase electric energy metering chip 3001A receives the voltage analog signal of the phase line a collected by the first voltage transformer 100A and the current analog signal of the phase line a of the first branch circuit collected by the first current transformer 2001A, respectively, and performs analog-to-digital conversion and calculation on the voltage analog signal and the current analog signal to obtain a power grid load parameter digital signal of the phase line a of the first branch circuit;
the second single-phase electric energy metering chip 3001B receives the voltage analog signal of the B-phase line acquired by the second voltage transformer 100B and the current analog signal of the B-phase line of the first branch circuit acquired by the second current transformer 2001B, respectively, and performs analog-to-digital conversion and calculation on the voltage analog signal and the current analog signal to obtain a power grid load parameter digital signal of the B-phase line of the first branch circuit;
the third single-phase electric energy metering chip 3001C receives the voltage analog signal of the C-phase line acquired by the third voltage transformer 100C and the current analog signal of the C-phase line of the first branch circuit acquired by the third current transformer 2001C, respectively, and performs analog-to-digital conversion and calculation on the voltage analog signal and the current analog signal to obtain a power grid load parameter digital signal of the C-phase line of the first branch circuit;
the fourth single-phase electric energy metering chip 3002A receives the voltage analog signal of the a-phase line acquired by the first voltage transformer 100A and the current analog signal of the a-phase line of the second branch circuit acquired by the fourth current transformer 2002A, and performs analog-to-digital conversion and calculation on the voltage analog signal and the current analog signal to obtain a power grid load parameter digital signal of the a-phase line of the second branch circuit;
the fifth single-phase electric energy metering chip 3002B receives the voltage analog signal of the B-phase line acquired by the second voltage transformer 100B and the current analog signal of the B-phase line of the second branch circuit acquired by the fifth current transformer 2002B, and performs analog-to-digital conversion and calculation on the voltage analog signal and the current analog signal to obtain a power grid load parameter digital signal of the B-phase line of the second branch circuit;
the sixth single-phase electric energy metering chip 3002C receives the voltage analog signal of the C-phase line acquired by the third voltage transformer 100C and the current analog signal of the C-phase line of the second branch circuit acquired by the sixth current transformer 2002C, and performs analog-to-digital conversion and calculation on the voltage analog signal and the current analog signal to obtain a power grid load parameter digital signal of the C-phase line of the second branch circuit;
the temperature sampling chip Z respectively receives an operating temperature analog signal measured by the first temperature sensor X and an environment temperature analog signal measured by the second temperature sensor Y, and performs analog-to-digital conversion on the operating temperature analog signal and the environment temperature analog signal to obtain corresponding digital signals;
therefore, according to three-phase (A phase, B phase and C phase) power grid load parameters of 2 branch circuits obtained by processing of the microcontroller 500, the load condition of any branch circuit can be analyzed; meanwhile, the temperature rise condition of the distribution transformer can be analyzed and obtained according to the actual operation temperature value and the real-time environment temperature value of the distribution transformer, which are obtained by processing of the microcontroller 500.
Based on the first embodiment, the second embodiment of the present invention discloses another distribution transformer monitoring apparatus to realize online monitoring of the operating temperature, the temperature rise condition and the branch load distribution condition of the distribution transformer, referring to fig. 3, including: the voltage detection unit 100, the current detection unit 200, the temperature detection unit 300, the sampling chip 400, the microcontroller 500, and the communication module 600.
Specifically, the communication module 600 is connected between the microcontroller 500 and the power distribution terminal, and is configured to transmit a processing result of the microcontroller 500 to the power distribution terminal, so as to implement a deep application of the intelligent distribution transformer terminal;
in view of the characteristics of convenience in network connection, good anti-interference performance, long transmission distance and the like of the isolated RS485 communication module, the isolated RS485 communication module is preferably selected as the communication module 600, so that accurate transmission of actual power grid load parameters obtained by processing of the microcontroller 500 is guaranteed.
In addition, still referring to fig. 3, the distribution transformer monitoring apparatus according to the second embodiment of the present invention may further include: a storage module 700.
The storage module 700 is connected to the microcontroller 500, and is configured to store the actual grid load parameter, the actual operating temperature value, and the actual environment temperature value of each phase line of each branch loop, which are obtained by processing by the microcontroller 500.
To ensure fast and accurate storage and reading of the actual grid load parameters, the storage module 700 preferably selects a ferroelectric memory (FRAM); FRAM realizes data storage by using a ferroelectric effect, can combine the nonvolatile data storage characteristics of a ROM (Read-Only Memory) with the advantages of unlimited Read-write, high-speed Read-write, low power consumption and the like of a RAM (random access Memory), and has higher write-in speed and longer Read-write life compared with earlier nonvolatile memories such as a flash Memory and an EEPROM (Electrically erasable programmable Read-Only Memory).
In the second embodiment, the microcontroller 500 performs initialization configuration on the sampling chip 400, and monitors the running state of the sampling chip in real time, after the sampling and calculation of the sampling chip 400 are completed, the microcontroller 500 is prompted that data to be read is ready, and at this time, the microcontroller 500 reads the digital signal processed by the sampling chip 400 and performs corresponding conversion to obtain a corresponding actual value, and stores the actual value in the storage module 700; when communication with the power distribution terminal is required, the microcontroller 500 reads corresponding data from the memory module 700 and transmits the data to the power distribution terminal through the communication module 600.
In addition, still referring to fig. 3, the distribution transformer monitoring apparatus according to the second embodiment of the present invention may further include: a module 800 is indicated.
The indication module 800 is connected to the microcontroller 500, and is configured to indicate an operation condition of the distribution transformer monitoring apparatus.
Specifically, the microcontroller 500 monitors the operating states of the sampling chip 400, the communication module 600, the storage module 700, and the like in real time, and controls the indication module 800 to display the monitoring result; such as: when the distribution transformer monitoring device normally operates, the microcontroller 500 controls the first signal lamp of the indicating module 800 to continuously flash; when the distribution transformer monitoring device breaks down or stops running, the first signal lamp is controlled to be turned off; when the distribution transformer monitoring device communicates with a distribution terminal, the microcontroller 500 controls the second signal lamp of the indication module 800 to continuously flash; and when the communication process is interrupted or the communication is in fault, controlling the second signal lamp to be extinguished. Therefore, related workers can know the operation condition of the distribution transformer monitoring device in real time conveniently, and corresponding processing is performed in time.
In addition, the power supply of any distribution transformer monitoring device can preferably adopt a linear power supply so as to avoid harmonic interference and ensure the accuracy of a monitoring result.
In summary, in the embodiments of the present invention, the sampling chip performs comprehensive processing on the output signals of the voltage and current detection units to obtain the digital signal of the power grid load parameter of each phase line of each branch loop, and the sampling chip also performs processing on the output signal of the temperature detection unit to obtain the digital signal of the operating temperature and the digital signal of the ambient temperature; and finally, reading the digital signal by a microcontroller and converting the digital signal into a corresponding actual value. The difference between the actual operation temperature value and the actual environment temperature value is the temperature rise of the distribution transformer, so that the working personnel can realize the online monitoring of the operation temperature and the temperature rise condition of the distribution transformer according to the actual operation temperature value and the actual environment temperature value output by the microcontroller; meanwhile, the staff can calculate the power load respectively borne by each branch loop by analyzing the actual power grid load parameter of each phase line of each branch loop output by the microcontroller, so that the online monitoring of the branch load distribution condition of the distribution transformer is realized.
Based on the method, when the working personnel find that the distribution transformer has potential safety hazards such as over-limit operation temperature, over-limit temperature rise and the like and/or the phenomenon of serious unbalanced branch load distribution, corresponding measures can be taken in time to regulate and control the operation condition of the distribution transformer, so that the distribution transformer is prevented from being burnt due to over-temperature, and the safe and economic operation of the distribution network is ensured.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the embodiments. Thus, the present embodiments are not intended to be limited to the embodiments shown herein but are to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A distribution transformer monitoring device comprises a voltage detection unit, a current detection unit and a temperature detection unit, wherein the voltage detection unit is used for measuring and obtaining three-phase voltage analog signals of a distribution transformer, the temperature detection unit is used for measuring and obtaining operation temperature analog signals of the distribution transformer and environment temperature analog signals of the environment where the distribution transformer is located, and the current detection unit is used for measuring and obtaining three-phase current analog signals of each branch loop of the distribution transformer;
distribution transformer monitoring devices still includes:
the sampling chips are respectively connected with the temperature detection unit, the voltage detection unit and the current detection unit and are used for processing the received analog signals to obtain an operating temperature digital signal, an environment temperature digital signal and a power grid load parameter digital signal of each phase line of each branch loop; the power grid load parameters comprise voltage, current, active power, reactive power, apparent power and power factor;
and the microcontroller is connected with the sampling chip and is used for processing the read digital signals to obtain an actual operating temperature value, an actual environment temperature value and an actual power grid load parameter of each phase line of each branch loop.
2. The distribution transformer monitoring device of claim 1, wherein the voltage detection unit comprises:
the first voltage transformer is used for measuring and obtaining an A-phase voltage analog signal of the distribution transformer;
the second voltage transformer is used for measuring and obtaining a B-phase voltage analog signal of the distribution transformer;
and the third voltage transformer is used for measuring and obtaining a C-phase voltage analog signal of the distribution transformer.
3. The distribution transformer monitoring device of claim 1, wherein the current detection unit comprises: and the current transformers are respectively arranged on different phase lines of different branch loops of the distribution transformer.
4. The distribution transformer monitoring device of claim 1, wherein the sampling chip comprises a branch loop sampling chip and a temperature sampling chip.
5. The distribution transformer monitoring device of claim 4, wherein the branch loop sampling chip and/or the temperature sampling chip comprises a CS5463 chip.
6. The distribution transformer monitoring device of claim 1, wherein the temperature detection unit comprises a PT100 temperature sensor;
wherein the PT100 temperature sensor includes a two-wire system PT100 temperature sensor.
7. The distribution transformer monitoring device of claim 1, wherein the microcontroller comprises an STM32F103 series microcontroller.
8. The distribution transformer monitoring device of any one of claims 1 to 7, further comprising: the communication module is connected between the microcontroller and the power distribution terminal and is used for outputting the actual operation temperature value, the actual environment temperature value and the actual power grid load parameter of each phase line of each branch loop to the power distribution terminal; wherein,
the communication module comprises an isolation type RS485 communication module.
9. The distribution transformer monitoring device of any one of claims 1 to 7, further comprising: the storage module is connected with the microcontroller and is used for storing the actual operation temperature value, the actual environment temperature value and the actual power grid load parameter of each phase line of each branch loop; wherein,
the memory module comprises a ferroelectric memory FRAM.
10. The distribution transformer monitoring device of any one of claims 1 to 7, further comprising: the indication module is connected with the microcontroller;
the indicating module is used for indicating the operation condition of the distribution transformer monitoring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310755615.0A CN103713187B (en) | 2013-12-31 | 2013-12-31 | A kind of distributing transformer monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310755615.0A CN103713187B (en) | 2013-12-31 | 2013-12-31 | A kind of distributing transformer monitoring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103713187A CN103713187A (en) | 2014-04-09 |
| CN103713187B true CN103713187B (en) | 2017-01-04 |
Family
ID=50406317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310755615.0A Expired - Fee Related CN103713187B (en) | 2013-12-31 | 2013-12-31 | A kind of distributing transformer monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103713187B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105372540A (en) * | 2015-12-21 | 2016-03-02 | 河海大学常州校区 | Performance on-line monitoring device for power distribution switch cabinet lightning arrester and monitoring method thereof |
| CN105375643A (en) * | 2015-12-21 | 2016-03-02 | 河海大学常州校区 | On-line monitoring device for power distribution transformer performance and monitoring method thereof |
| CN106443275A (en) * | 2016-10-28 | 2017-02-22 | 中国舰船研究设计中心 | Method and apparatus for monitoring low-voltage distribution transformer for ship |
| CN107884669A (en) * | 2017-12-28 | 2018-04-06 | 国网山东省电力公司高密市供电公司 | A kind of distribution transformer operating state monitoring system |
| CN109066731A (en) * | 2018-07-26 | 2018-12-21 | 广东电网有限责任公司佛山供电局 | Distribution net platform region three-phase load unbalance self-checking device |
| CN109827679B (en) * | 2019-03-11 | 2020-08-04 | 山东理工大学 | Distribution transformer winding temperature rise online monitoring system and online monitoring method |
| CN111999608B (en) * | 2020-07-27 | 2023-04-18 | 北京智芯微电子科技有限公司 | Monitoring method and monitoring system of distribution transformer and intelligent terminal |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58113865A (en) * | 1981-12-28 | 1983-07-06 | Fuji Electric Co Ltd | Detecting device for dc voltage |
| CN201234165Y (en) * | 2008-06-06 | 2009-05-06 | 陈家斌 | Automatic control apparatus for power distribution system |
| CN203084118U (en) * | 2013-01-08 | 2013-07-24 | 武汉汉镇既济电力设备有限公司 | Monitoring equipment |
| CN203084116U (en) * | 2013-01-08 | 2013-07-24 | 武汉汉镇既济电力设备有限公司 | Monitoring device suitable for power distribution system |
| CN103399241B (en) * | 2013-08-15 | 2016-01-20 | 南京新联电子股份有限公司 | Based on substation transformer fault diagnosis system and the method for temperature rise and load relation |
-
2013
- 2013-12-31 CN CN201310755615.0A patent/CN103713187B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN103713187A (en) | 2014-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103713187B (en) | A kind of distributing transformer monitoring device | |
| CN104569902B (en) | Digital type electric energy meter power consumption measuring device and method | |
| CN203838239U (en) | Distribution transformer monitoring device | |
| CN104280715B (en) | Gateway electric energy meter online monitoring system | |
| CN203275631U (en) | Intelligent detection system of microcomputer type relay protection tester | |
| CN103728043B (en) | Distribution transformer temperature monitoring device | |
| CN202836819U (en) | Multi-channel temperature acquisition circuit of intelligent electric power monitor | |
| CN107328989B (en) | Transformer substation overvoltage monitoring system and method based on wireless acquisition technology | |
| CN103683299B (en) | A kind of distribution transformer branch load monitoring device | |
| RU65655U1 (en) | MULTIFUNCTIONAL DEVICE FOR CONTROL OF INDICATORS OF QUALITY OF ELECTRIC POWER OF THE ELECTRIC NETWORK | |
| CN206515459U (en) | A kind of actual loading test system of electric energy meter | |
| CN203101474U (en) | Electrification detector for high-voltage electric system | |
| CN105676044A (en) | Online test method and system for lightning arrester and monitor thereof | |
| CN203037844U (en) | Intelligent testing device for electric energy meter built-in load switch | |
| CN113009291B (en) | Intelligent substation intelligent sensing terminal performance detection method and device | |
| CN203837835U (en) | Distribution transformer temperature monitoring device | |
| CN205003214U (en) | Dual -purpose insulation resistance tester of on -line monitoring NOT AND on -line measuring | |
| CN204118743U (en) | A kind of distribution transformer branch load monitoring device | |
| CN211123230U (en) | Portable automatic debugging system for calibrator | |
| CN204758690U (en) | Multipurpose plier table that appears | |
| CN204391901U (en) | A kind of low-voltage circuit breaker intelligent controller based on CAN | |
| CN2938253Y (en) | Remote electric network parameter monitor based on Ethernet | |
| CN204085564U (en) | Based on the Temperature and Humidity instrument of Arduino | |
| CN203455024U (en) | Early warning apparatus for secure operation of switch cabinet | |
| CN103048990B (en) | Error verification device and system and error propagation system and method of all-digital power measuring and controlling equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190307 Address after: Room 407, Unit 2, Unit 1, Haihui Center, No. 4559 Binhai Sandao, Wenzhou Economic and Technological Development Zone, 325000 Zhejiang Province Patentee after: ZHEJIANG TUSHENG POWER TRANSMISSION ENGINEERING CO., LTD. Address before: 325011 Binhai Park A408 District, Wenzhou Economic and Technological Development Zone, Zhejiang Province Patentee before: WENZHOU TUSHENG TECHNOLOGY CO., LTD. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170104 Termination date: 20181231 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |