CN105527600B - A kind of current transformer condition monitoring system and method - Google Patents
A kind of current transformer condition monitoring system and method Download PDFInfo
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- CN105527600B CN105527600B CN201610019965.4A CN201610019965A CN105527600B CN 105527600 B CN105527600 B CN 105527600B CN 201610019965 A CN201610019965 A CN 201610019965A CN 105527600 B CN105527600 B CN 105527600B
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- 238000004891 communication Methods 0.000 claims abstract description 55
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 238000003745 diagnosis Methods 0.000 claims abstract description 15
- 230000003993 interaction Effects 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 5
- 230000000875 corresponding Effects 0.000 claims description 4
- 230000003287 optical Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000004148 unit process Methods 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 2
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
Abstract
A kind of current transformer condition monitoring system and method, which is characterized in that the current transformer condition monitoring system includes：Controller unit, current transformer monitoring unit, temperature monitoring unit, humidity-monitoring unit, wireless communication unit, monitoring processing unit, status display unit, audio alert unit, power supply unit.The present invention is capable of the operating status of on-line monitoring leakage current mutual inductor, the operating parameter of current transformer can be acquired in real time, it can realize the wireless transmission of current transformer monitoring data in station, diagnosis can be identified to the operation troubles of current transformer, realize the monitoring to current transformer state and fault pre-alarming, audio alert is carried out to current mulual inductor malfunction information, fault alarm information is wirelessly sent to staff's timely processing, ensures the normal operation of current transformer.
Description
Technical field
The invention belongs to POWER SYSTEM STATEs to monitor field, be related to a kind of condition monitoring system and method for power equipment,
Especially a kind of current transformer condition monitoring system and method.
Background technology
Mutual inductor is one of indispensable capital equipment such as power network normal operation, monitoring, metering, protection, control.It
Presence, so that high voltage, high current information is applied.Mutual inductor operating status is good and bad, directly influence power system measuring,
The reliability of the accuracy of metering and relay protection, automatic device influences safe operation of power system very big.
Currently, in the power system, the use of current transformer is extensive, and for the status monitoring of current transformer itself
Problem without studying and solving well.Current transformer itself is there is performance issue and failure problems, once Current Mutual Inductance
The abnormal safe operation that electric system will be seriously affected with failure of operating status occurs for device.Therefore, it is necessary to a kind of Current Mutual Inductances
Device condition monitoring system and method are capable of the state of on-line real time monitoring current transformer, examine the failure of current transformer
It is disconnected, failure existing for current transformer is found and solved early, ensures the normal operation of current transformer.
Invention content
The present invention can not solve the problems, such as that above-mentioned current transformer exists for the prior art, provide a kind of Current Mutual Inductance
Device condition monitoring system and method.Current transformer condition monitoring system supervises the operating status of current transformer online
It surveys, acquires the operating parameter of current transformer in real time, can realize the wireless transmission of current transformer monitoring data in station, complete
Identification to current transformer operation troubles, in real time to current transformer status monitoring and fault pre-alarming, to current transformer event
Hinder information and carry out audio alert, fault alarm information is wirelessly sent to staff's timely processing, ensures current transformer
Normal operation.
In order to complete above-mentioned purpose, the present invention uses following technical scheme.
A kind of current transformer condition monitoring system, which is characterized in that the current transformer condition monitoring system includes：
Controller unit, current transformer monitoring unit, temperature monitoring unit, humidity-monitoring unit, wireless communication unit, monitoring processing
Unit, status display unit, audio alert unit, power supply unit.The controller unit monitors with current transformer single respectively
Member, humidity-monitoring unit, wireless communication unit, status display unit, audio alert unit, power supply unit connection.The power supply
Unit respectively with controller unit, current transformer monitoring unit, humidity-monitoring unit, wireless communication unit, status display list
Member, the connection of audio alert unit.The temperature monitoring unit, monitoring processing unit are connect with wireless communication unit.
The controller unit respectively with current transformer monitoring unit, humidity-monitoring unit, wireless communication unit, shape
State display unit, audio alert unit, power supply unit connection, receive processing current transformer monitoring unit, humidity-monitoring unit,
The information and data that wireless communication unit, status display unit, audio alert unit, power supply unit transmission come, and it is mutual to electric current
Sensor monitoring unit, humidity-monitoring unit, wireless communication unit, status display unit, audio alert unit, power supply unit transmission
Command information and data, control corresponding units complete corresponding function.
The current transformer monitoring unit is connect with controller unit, for realizing Current Transformer Secondary side electric current
Monitoring.Current transformer monitoring unit includes power pack, low-pass filter, polarity switch, analog-digital converter.
The temperature monitoring unit is connect with wireless communication unit, is used for the running temperature of real-time monitoring current mutual inductor
And the temperature on the busbar of mutual inductor inlet wire.Temperature monitoring unit include fiber-optic grating sensor, optical branching box, sealing flange,
Fiber optic closure, fiber Bragg grating (FBG) demodulator.
The humidity-monitoring unit is connect with controller unit, the running environment for real-time monitoring current mutual inductor
Humidity.Humidity-monitoring unit includes humidity sensor.
The wireless communication unit carries out for controller unit, temperature monitoring unit with monitoring processing unit real-time
Data exchange is transmitted and data processing, and the current mulual inductor malfunction information for that will monitor processing unit processes is sent out to staff
SMS is sent to prompt.Wireless communication unit includes ZigBee communication module, SMS transmission module.The ZigBee communication module
It is separately mounted to controller unit, temperature monitoring unit, monitors on processing unit, realize controller unit, temperature monitoring unit
With the wireless communication between monitoring processing unit.The SMS transmission module is mounted on monitoring processing unit, is realized at monitoring
It manages unit and sends SMS prompt current mulual inductor malfunction information to staff.
The monitoring processing unit is used to receive the monitoring data of current transformer operation field controller cell processing
With the temperature data of temperature monitoring unit, by radio communication unit realize and the data of controller unit and temperature monitoring unit
Communication connection is completed to the data processing of condition monitoring system, fault diagnosis and processing and human-computer interaction function.Monitoring processing is single
Member includes server, host computer.
The status display unit is connect with controller unit, is used for the current transformer of display controller cell processing
The monitoring data of operation and temperature data and fault diagnosis data after monitoring processing unit processes analysis.Status display unit packet
Include display.
The audio alert unit is connect with controller unit, for running shape to current flow mutual inductor by voice
State and fault condition carry out speech play and alarm.Audio alert unit includes：Audio alert chip, speaker.
The power supply unit is realized to controller unit, current transformer monitoring unit, humidity-monitoring unit, channel radio
Believe that unit, status display unit, audio alert unit provide suitable electric energy power supply.Power supply unit includes Switching Power Supply.
The temperature monitoring unit and monitoring processing unit is powered by mains-supplied in monitoring room.
A kind of current transformer state monitoring method, which is characterized in that current transformer state monitoring method includes following
Step：Current transformer monitoring unit monitors the secondary side current of current transformer in real time, and humidity-monitoring unit is real-time
The humidity of the running environment of monitoring current mutual inductor.Controller unit is to current transformer monitoring unit, humidity-monitoring unit
Monitoring data are handled, by radio communication unit with monitoring processing unit into row data communication.
Temperature monitoring unit on the inlet wire busbar of current transformer, at the secondary side outlet joint of current transformer, electricity
Temperature on current transformer is monitored, by radio communication unit with monitoring processing unit into row data communication.
Monitor that processing unit completes the storage of data and operation calculates, and complete to the data processing of condition monitoring system,
Fault diagnosis and processing and human-computer interaction function.Monitoring processing unit, unit carries out data with controller unit by radio communication
Data processing, fault diagnosis result are fed back to controller unit by communication, and controller unit control exists the result of monitoring processing
Display is exported in status display unit on display.
Audio alert unit by voice to current flow mutual inductor operating status and fault condition carry out speech play and
Alarm.
The beneficial effects of the invention are as follows：A kind of current transformer condition monitoring system of the present invention and method, can supervise online
The operating status for surveying current transformer, can acquire the operating parameter of current transformer in real time, can realize Current Mutual Inductance in station
The operation troubles of current transformer can be identified diagnosis in the wireless transmission of device monitoring data, realize to current transformer
The monitoring of state and fault pre-alarming carry out audio alert to current mulual inductor malfunction information, fault alarm information are transmitted wirelessly
Staff's timely processing is given, ensures the normal operation of current transformer.
Description of the drawings
Fig. 1 is current transformer condition monitoring system overall structure functional schematic of the present invention.
1, controller unit in figure, 2, current transformer monitoring unit, 3, temperature monitoring unit, 4, humidity-monitoring unit,
5, wireless communication unit, 6, monitoring processing unit, 7, status display unit, 8, audio alert unit, 9, power supply unit.
Specific implementation mode
The present invention is further illustrated with reference to the accompanying drawings and examples, to be specifically described the technical side of the present invention
Case.
As shown in Figure 1, a kind of current transformer condition monitoring system of the present invention, which is characterized in that the current transformer
Condition monitoring system includes：Controller unit 1, current transformer monitoring unit 2, temperature monitoring unit 3, humidity-monitoring unit 4,
Wireless communication unit 5, monitoring processing unit 6, status display unit 7, audio alert unit 8, power supply unit 9.The controller
Unit 1 respectively with current transformer monitoring unit 2, humidity-monitoring unit 4, wireless communication unit 5, status display unit 7, voice
Alarm unit 8, power supply unit 9 connect.Said supply unit 9 respectively with controller unit 1, current transformer monitoring unit 2, wet
Monitoring unit 4, wireless communication unit 5, status display unit 7, audio alert unit 8 is spent to connect.The temperature monitoring unit 3,
Monitoring processing unit 6 is connect with wireless communication unit 5.
The controller unit 1 is using TMS320F2812 data processors as the processor for controlling and handling data.
The current transformer monitoring unit 2 includes power pack, low-pass filter, polarity switch, modulus turn
Parallel operation.Power pack be mounted on current transformer secondary side, after being converted to Current Transformer Secondary side electric current by
TMS320F2812 processors can be located in low-pass filter, polarity switch, analog-digital converter processing acquisition controller unit 1
The signal of reason.
The temperature monitoring unit 3 includes fiber-optic grating sensor, optical branching box, sealing flange, fiber optic closure, light
Fine grating demodulation instrument.Fiber-optic grating sensor is mounted on the inlet wire busbar of current transformer, the secondary side of current transformer goes out
At wire terminal, on current transformer.Fiber-optic grating sensor is sequentially connected optical branching box, sealing flange, fiber optic closure, optical fiber
Grating demodulation instrument completes detection of the system to temperature, and temperature data is transferred to monitoring processing unit by unit 5 by radio communication
Host computer and server in 6.
The humidity-monitoring unit 4 includes humidity sensor.Humidity sensor is mounted near current transformer, in real time
The running environment humidity of monitoring current mutual inductor.
The wireless communication unit 5 includes ZigBee communication module, SMS transmission module, realizes controller unit 1, temperature
Degree monitoring unit 3 carries out real-time data exchange transmission and data processing with monitoring processing unit 6, and realization will monitor processing unit
The current mulual inductor malfunction information of 6 processing sends SMS prompt to staff.
The monitoring processing unit 6 includes server, host computer.Server completes the storage of data and operation calculates；
Host computer is completed to the data processing of condition monitoring system, fault diagnosis and processing and human-computer interaction function.
The status display unit 7 includes display.Display is connect with controller unit 1, is completed to controller list
The Condition Monitoring Data and the temperature data after the monitoring processing analysis of processing unit 6 of the current mutual inductor on site operation of 1 processing of member
It is shown with fault diagnosis data.
The audio alert unit 8 includes audio alert chip, speaker.Audio alert chip connects with controller unit 1
It connects, audio alert chip is connect with speaker, completes to carry out current flow mutual inductor operating status and fault condition by voice
Speech play and alarm.
The power supply unit 9 includes Switching Power Supply, by Switching Power Supply to the low-voltage at current transformer operation scene
Electric energy is converted to obtain the voltage and current for being suitble to the operation of condition monitoring system scene.
The power supply of the temperature monitoring unit 3 and monitoring processing unit 6 is by mains-supplied in monitoring room.
A kind of current transformer condition monitoring system operation principle is as follows：Current transformer monitoring unit 2 is to Current Mutual Inductance
The secondary side current of device is monitored in real time, the humidity of the running environment of 4 real-time monitoring current mutual inductor of humidity-monitoring unit.Control
Device unit 1 processed handles the monitoring data of current transformer monitoring unit 2, humidity-monitoring unit 4, single by radio communication
Member 5 is with monitoring processing unit 6 into row data communication.
Temperature monitoring unit 3 on the inlet wire busbar of current transformer, at the secondary side outlet joint of current transformer, electricity
Temperature on current transformer is monitored, by radio communication unit 5 with monitoring processing unit 6 into row data communication.
Monitor that processing unit 6 completes the storage of data and operation calculates, and complete to the data processing of condition monitoring system,
Fault diagnosis and processing and human-computer interaction function.Monitoring processing unit 6, unit 5 is carried out with controller unit 1 by radio communication
Data communicate, and data processing, fault diagnosis result are fed back to controller unit 1, the control of controller unit 1 handles monitoring
As a result display is exported on display in status display unit 7.
Audio alert unit 8 by voice to current flow mutual inductor operating status and fault condition carry out speech play and
Alarm.
By the above current transformer condition monitoring system of the present invention and the embodiment of the method course of work, online prison is completed
The operating status for surveying current transformer, can acquire the operating parameter of current transformer in real time, can realize Current Mutual Inductance in station
The operation troubles of current transformer can be identified diagnosis in the wireless transmission of device monitoring data, realize to current transformer
The monitoring of state and fault pre-alarming carry out audio alert to current mulual inductor malfunction information, fault alarm information are transmitted wirelessly
Staff's timely processing is given, ensures the normal operation of current transformer.
Claims (1)
1. a kind of current transformer condition monitoring system, which is characterized in that the current transformer condition monitoring system includes：Control
Device unit processed, current transformer monitoring unit, temperature monitoring unit, humidity-monitoring unit, wireless communication unit, monitoring processing are single
Member, status display unit, audio alert unit, power supply unit；The controller unit respectively with current transformer monitoring unit,
Humidity-monitoring unit, wireless communication unit, status display unit, audio alert unit, power supply unit connection；Said supply unit
Respectively with controller unit, current transformer monitoring unit, humidity-monitoring unit, wireless communication unit, status display unit, language
Sound alarm unit connects；The temperature monitoring unit, monitoring processing unit are connect with wireless communication unit；
The controller unit is aobvious with current transformer monitoring unit, humidity-monitoring unit, wireless communication unit, state respectively
Show unit, audio alert unit, power supply unit connection, receives processing current transformer monitoring unit, humidity-monitoring unit, wireless
The information and data that communication unit, status display unit, audio alert unit, power supply unit transmission come, and to current transformer
Monitoring unit, humidity-monitoring unit, wireless communication unit, status display unit, audio alert unit, power supply unit transmission order
Information and data, control corresponding units complete corresponding function；
The current transformer monitoring unit is connect with controller unit, for realizing the prison of Current Transformer Secondary side electric current
It surveys；Current transformer monitoring unit includes power pack, low-pass filter, polarity switch, analog-digital converter；
The temperature monitoring unit is connect with wireless communication unit, for real-time monitoring current mutual inductor running temperature and mutually
Temperature on the busbar of sensor inlet wire；Temperature monitoring unit includes fiber-optic grating sensor, optical branching box, sealing flange, optical fiber
Splice tray, fiber Bragg grating (FBG) demodulator；
The humidity-monitoring unit is connect with controller unit, is used for the wet of the running environment of real-time monitoring current mutual inductor
Degree；Humidity-monitoring unit includes humidity sensor；
The wireless communication unit carries out real-time data for controller unit, temperature monitoring unit and monitoring processing unit
Transmission and data processing are exchanged, the current mulual inductor malfunction information for that will monitor processing unit processes sends hand to staff
Machine short message prompt；Wireless communication unit includes ZigBee communication module, SMS transmission module；The ZigBee communication module difference
On controller unit, temperature monitoring unit, monitoring processing unit, controller unit, temperature monitoring unit and prison are realized
Control the wireless communication between processing unit；The SMS transmission module is mounted on monitoring processing unit, realizes that monitoring processing is single
Member sends SMS to staff and prompts current mulual inductor malfunction information；
The monitoring processing unit is used to receive the monitoring data and temperature of current transformer operation field controller cell processing
The temperature data of monitoring unit is spent, unit realization by radio communication is communicated with the data of controller unit and temperature monitoring unit
Connection is completed to the data processing of condition monitoring system, fault diagnosis and processing and human-computer interaction function；Monitor processing unit packet
Include server, host computer；
The status display unit is connect with controller unit, and the current transformer for display controller cell processing is run
Monitoring data and monitoring processing unit processes analysis after temperature data and fault diagnosis data；Status display unit includes aobvious
Show device；
The audio alert unit is connect with controller unit, for by voice to current flow mutual inductor operating status and
Fault condition carries out speech play and alarm；Audio alert unit includes：Audio alert chip, speaker；
The power supply unit is realized single to controller unit, current transformer monitoring unit, humidity-monitoring unit, wireless communication
Member, status display unit, audio alert unit provide suitable electric energy power supply；Power supply unit includes Switching Power Supply；
The current transformer state monitoring method includes the following steps：Current transformer monitoring unit is to current transformer
Secondary side current is monitored in real time, the humidity of the running environment of the real-time monitoring current mutual inductor of humidity-monitoring unit；Controller
Unit handles the monitoring data of current transformer monitoring unit, humidity-monitoring unit, by radio communication unit and prison
Processing unit is controlled into row data communication；
Temperature monitoring unit on the inlet wire busbar of current transformer, at the secondary side outlet joint of current transformer, electric current it is mutual
Temperature on sensor is monitored, by radio communication unit with monitoring processing unit into row data communication；
It monitors that processing unit completes the storage of data and operation calculates, and completes data processing to condition monitoring system, failure
Diagnosis and processing and human-computer interaction function；Monitoring processing unit, unit and controller unit progress data are logical by radio communication
Data processing, fault diagnosis result are fed back to controller unit by letter, and controller unit control is by the result of monitoring processing in shape
Display is exported in state display unit on display；
Audio alert unit carries out speech play and alarm by voice to current flow mutual inductor operating status and fault condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610019965.4A CN105527600B (en) | 2016-01-13 | 2016-01-13 | A kind of current transformer condition monitoring system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610019965.4A CN105527600B (en) | 2016-01-13 | 2016-01-13 | A kind of current transformer condition monitoring system and method |
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| Publication Number | Publication Date |
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| CN105527600A CN105527600A (en) | 2016-04-27 |
| CN105527600B true CN105527600B (en) | 2018-07-13 |
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| CN201610019965.4A Expired - Fee Related CN105527600B (en) | 2016-01-13 | 2016-01-13 | A kind of current transformer condition monitoring system and method |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110040475B (en) * | 2019-04-30 | 2021-05-28 | 广东省计量科学研究院（华南国家计量测试中心） | Quality monitoring system and method for current transformer test assembly line |
| CN110196082A (en) * | 2019-07-11 | 2019-09-03 | 谢明仿 | A kind of environment monitoring device and method of electronic mutual inductor |
| CN110687493A (en) * | 2019-09-30 | 2020-01-14 | 国网江苏省电力有限公司盐城供电分公司 | Current transformer on-line measuring system based on multiple signal acquisition |
| CN112630506A (en) * | 2020-11-30 | 2021-04-09 | 众源科技(广东)股份有限公司 | Wireless transmission current temperature transformer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60152964A (en) * | 1984-01-23 | 1985-08-12 | Toshiba Corp | Tester for through type current transformer |
| JP2009025055A (en) * | 2007-07-18 | 2009-02-05 | Kawamura Electric Inc | Output converting circuit for current transformer |
| CN104330759A (en) * | 2014-11-06 | 2015-02-04 | 国家电网公司 | Value traceability and monitoring method for low-voltage current transformer automation verification system |
| CN204241588U (en) * | 2014-11-11 | 2015-04-01 | 国家电网公司 | Current transformer operating state monitoring system |
| CN205353340U (en) * | 2016-01-13 | 2016-06-29 | 济南大学 | Current transformer state monitoring system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104698311B (en) * | 2015-02-25 | 2018-05-18 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of DC line direct current arrester live detection method |
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2016
- 2016-01-13 CN CN201610019965.4A patent/CN105527600B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60152964A (en) * | 1984-01-23 | 1985-08-12 | Toshiba Corp | Tester for through type current transformer |
| JP2009025055A (en) * | 2007-07-18 | 2009-02-05 | Kawamura Electric Inc | Output converting circuit for current transformer |
| CN104330759A (en) * | 2014-11-06 | 2015-02-04 | 国家电网公司 | Value traceability and monitoring method for low-voltage current transformer automation verification system |
| CN204241588U (en) * | 2014-11-11 | 2015-04-01 | 国家电网公司 | Current transformer operating state monitoring system |
| CN205353340U (en) * | 2016-01-13 | 2016-06-29 | 济南大学 | Current transformer state monitoring system |
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