CN201936442U - On-line monitoring system for capacitance voltage transformer - Google Patents

On-line monitoring system for capacitance voltage transformer Download PDF

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Publication number
CN201936442U
CN201936442U CN201120048066XU CN201120048066U CN201936442U CN 201936442 U CN201936442 U CN 201936442U CN 201120048066X U CN201120048066X U CN 201120048066XU CN 201120048066 U CN201120048066 U CN 201120048066U CN 201936442 U CN201936442 U CN 201936442U
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China
Prior art keywords
line monitoring
monitoring
output terminal
unit
wireless network
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Expired - Fee Related
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CN201120048066XU
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Chinese (zh)
Inventor
李维峰
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North China Electric Power University
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North China Electric Power University
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Publication of CN201936442U publication Critical patent/CN201936442U/en
Anticipated expiration legal-status Critical
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Abstract

The utility model discloses an on-line monitoring system for a capacitance voltage transformer. The on-line monitoring system comprises a data acquisition terminal, a wireless network, a monitoring mainframe and a remote management master station, wherein the data acquisition terminal is connected with the monitoring mainframe through the wireless network; and the monitoring mainframe is connected with the remote management master station through an Ethernet. The utility model has the advantages that firstly, various information (such as end screen current, dielectric loss, etc.) of 500kV CVT (Constant-Voltage Transformer) equipment can be collected in real time; secondly, the running state variation of the CTV equipment can be monitored in time and the safety accidents such as insulating error of the CTV equipment can be found out in time; and thirdly, the monitoring data can be transmitted through 2.4GHz wireless network, the anti-interference performance is good, and the detection error is small.

Description

The capacitance type potential transformer on-line monitoring system
Technical field
The utility model relates to maintenance of electric device, relates in particular to a kind of capacitance type potential transformer on-line monitoring system.
Background technology
High voltage capacitive electrical equipment such as bushing, high-voltage capacitance formula voltage transformer (VT), high-tension current inductor, manifold type capacitor etc. are the important component parts of transformer station.Existing maintenance work is to carry out preventive trial, inspection.It has played certain effect to the reliability that improves equipment in early days, but has that proof cycle is long, labour intensity is big, validity is poor, influences problem such as power supply reliability.For the operation conditions of grasping electric system high voltage capacitive electrical equipment mainly adopts wired concentrated mode, by communication cable the data that are monitored to are delivered to same live testing instrument and compare at present, calculate relative phase difference, relative dielectric loss value etc.Because on-the-spot 500kV capacitance type potential transformer equipment is a lot, and be distributed in different positions, so just need with long communication cable, make that the connection of communication cable is very inconvenient, and simulating signal has decay to a certain degree and can't avoid various electromagnetic interference (EMI) in the scene, is difficult to realize the measurement of a plurality of 500kV capacitance type potential transformer operational factors simultaneously.Therefore can not in time find the potential safety hazard that the 500kV capacitance type potential transformer exists, lead to great security incident easily.
The utility model content
The utility model provides a kind of capacitance type potential transformer (CVT) on-line monitoring system, based on the utility model, can realize 500kV capacitance type potential transformer on-line monitoring.
A kind of capacitance type potential transformer on-line monitoring system of the utility model comprises: data collection station, monitoring main frame and telemanagement main website; Described data collection station is connected with described monitoring main frame by wireless network; And described monitoring main frame also is connected by Ethernet with described telemanagement main website.
Above-mentioned on-line monitoring system, preferred described CVT on-line monitoring system is a 500kV CVT on-line monitoring system, described wireless network is the wireless network of 2.4GHz.
Above-mentioned on-line monitoring system, preferred described acquisition terminal comprises current sensor, voltage sensor, signal condition unit, A/D converting unit, processor unit and wireless communication module; Wherein, the output terminal of described current sensor all is connected with the input end of described signal condition unit with the output terminal of described voltage sensor, and the output terminal of described signal condition unit, described A/D converting unit, described processor unit and wireless communication module are linked in sequence.
Above-mentioned on-line monitoring system, preferred described current sensor single-turn type punching sensor.
Above-mentioned on-line monitoring system, preferred described signal condition unit comprises filtering circuit and amplifying circuit, the input end of described filtering circuit all is connected with the output terminal of described current sensor and the output terminal of described voltage sensor, the output terminal of described filtering circuit is connected with the input end of described amplifying circuit, and the output terminal of described amplifying circuit is connected with described A/D converting unit.
Above-mentioned on-line monitoring system, preferred described processor unit is the DSP digital signal processor.
Above-mentioned on-line monitoring system, preferred described wireless communication module is the zigbee wireless communication module.
Compared with prior art, the utlity model has following advantage:
1, no electric connection between the utility model measuring equipment and the measured capacitance formula voltage transformer (VT), signals collecting and wireless transport module are integrated into data collection station, avoid simulating signal in transmission course, to be subjected to the influence of the interference of electromagnetic field, improved the degree of accuracy of data acquisition.
2, the utility model adopts the 2.4GHz wireless communication technology, solved the communication issue between data acquisition unit and the monitoring main website well, and be not subjected to the electromagnetic interference (EMI) of transformer station, broken away from the constraint of communication cable, reduce construction and maintenance greatly, and can obtain the various parameters of tested 500kV capacitance type potential transformer exactly.
3, the utility model sensor reliability height, stable performance, precision height, the life-span of adopting long, thereby improved stability, reliability and the accuracy of data collection station.
4, the utility model connects data collection station and monitoring main frame by wireless network, data collection station and the right independence of monitoring having property of main frame, and the increase-volume that therefore helps system enlarges.
Description of drawings
Fig. 1 is the utility model capacitance type potential transformer on-line monitoring system example structure synoptic diagram;
Fig. 2 is among the utility model capacitance type potential transformer on-line monitoring system embodiment, the structured flowchart of data collection station;
Fig. 3 is among the utility model capacitance type potential transformer on-line monitoring system embodiment, the structured flowchart of signal condition unit.
Embodiment
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Introduce a preferred embodiment of the present invention below in conjunction with Fig. 1 to Fig. 3.
With reference to Fig. 1, Fig. 1 is a CVT on-line monitoring system example structure synoptic diagram of the present invention.As shown in Figure 1, this CVT on-line monitoring system is the 500kVCVT on-line monitoring system, comprises a plurality of data collection stations 101,2.4GHz wireless network 102 monitoring main frames 103 and the telemanagement main website 104 that is connected by Ethernet with monitoring main frame 103.Monitoring main frame 103 is connected with data collection station 101 by 2.4GHz wireless network 102, with control data acquisition terminal 101, realizes on-line monitoring thereby finish reading of data.
With reference to Fig. 2, Fig. 2 is among the embodiment shown in Figure 1, the structured flowchart of data collection station.As shown in Figure 2, in the present embodiment, data collection station 101 comprises current sensor 201, voltage sensor 202, signal condition unit 203, A/D converting unit 204, processor unit 205 and wireless communication module 206.Current sensor 201 is connected the input end of signal condition unit 203 with the simulating signal that voltage sensor 202 collects, the output terminal of signal condition unit 203 connects the input end of A/D converting unit 204, the input end of the output terminal connection processing device unit 205 of A/D converting unit 204, the output terminal of processor unit 205 connects the input end of wireless communication module 206.
Current sensor 201 does not have direct the connection for high-precision single-turn type punching sensor with capacitance type potential transformer, and is safe and reliable.Voltage sensor 202 is high-precision sensor, measures the voltage signal of capacitance type potential transformer secondary side.Wireless communication module 206 is zigbee wireless communication modules.The zigbee wireless communication module adopts leading at present, most widely used new generation of wireless radio frequency chip, is to aim to be operated in the low-consumption wireless communication module that 2.4GHz ISM/SRD exempts to apply for the frequency range design.
With reference to Fig. 3, Fig. 3 is the structured flowchart of signal condition unit in the foregoing description.As shown in Figure 3, signal condition unit 203 comprises filtering circuit 301 and amplifying circuit 302.Current sensor 201 is connected the input end of signal condition unit 203 with the simulating signal that voltage sensor 202 collects, it is the input end of filtering circuit 301, the output terminal of filtering circuit 301 connects the input end of amplifying circuit 302, the output terminal of amplifying circuit 302, promptly the output terminal of signal condition unit 203 connects the input end of A/D converting unit 204.The 203 pairs of simulating signals that collect in signal condition unit are nursed one's health, and avoid occurring phase shift, guarantee the authenticity of signal.
The foregoing description can be gathered the multiple information of 500kV CVT equipment in real time, as: end screen electric current, dielectric loss etc., can monitor the variation of 500kV CVT equipment running status accurately and timely, in time find security incidents such as the apparatus insulated fault of 500kV CVT, and can export Monitoring Data accurately, reliably, strong interference immunity, to detect error little.
More than a kind of capacitance type potential transformer on-line monitoring system provided by the utility model is described in detail, used specific embodiment herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, part in specific embodiments and applications all can change.In sum, this description should not be construed as restriction of the present utility model.

Claims (7)

1. a capacitance type potential transformer on-line monitoring system is characterized in that, comprising:
Data collection station, monitoring main frame and telemanagement main website; Described data collection station is connected with described monitoring main frame by wireless network; And described monitoring main frame also is connected by Ethernet with described telemanagement main website.
2. on-line monitoring system according to claim 1 is characterized in that,
Described on-line monitoring system is a 500kV capacitance type potential transformer on-line monitoring system, and described wireless network is the wireless network of 2.4GHz.
3. on-line monitoring system according to claim 2 is characterized in that,
Described data collection station comprises current sensor, voltage sensor, signal condition unit, A/D converting unit, processor unit and wireless communication module;
Wherein, the output terminal of described current sensor all is connected with the input end of described signal condition unit with the output terminal of described voltage sensor, and the output terminal of described signal condition unit, described A/D converting unit, described processor unit and described wireless communication module are linked in sequence.
4. on-line monitoring system according to claim 3 is characterized in that, described current sensor is a single-turn type punching sensor.
5. on-line monitoring system according to claim 4 is characterized in that,
Described signal condition unit comprises filtering circuit and amplifying circuit, the input end of described filtering circuit all is connected with the output terminal of described current sensor and the output terminal of described voltage sensor, the output terminal of described filtering circuit is connected with the input end of described amplifying circuit, and the output terminal of described amplifying circuit is connected with described A/D converting unit.
6. on-line monitoring system according to claim 5 is characterized in that, described processor unit is the DSP digital signal processor.
7. on-line monitoring system according to claim 6 is characterized in that, described wireless communication module is the zigbee wireless communication module.
CN201120048066XU 2011-02-25 2011-02-25 On-line monitoring system for capacitance voltage transformer Expired - Fee Related CN201936442U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201120048066XU CN201936442U (en) 2011-02-25 2011-02-25 On-line monitoring system for capacitance voltage transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201120048066XU CN201936442U (en) 2011-02-25 2011-02-25 On-line monitoring system for capacitance voltage transformer

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102323478A (en) * 2011-08-23 2012-01-18 华北电力大学(保定) Flexible wide area power grid harmonic synchronous monitoring system
CN103308836A (en) * 2013-05-27 2013-09-18 河南省电力公司鹤壁供电公司 Method, device and system for monitoring insulating property of electronic transformer
CN103541767A (en) * 2013-09-30 2014-01-29 安徽华印机电股份有限公司 Mine safety monitoring system enabling ground and underground to be communicated through wireless network
CN105092936A (en) * 2015-08-24 2015-11-25 国网天津市电力公司 Equipment voltage monitoring instrument
CN106405192A (en) * 2015-07-30 2017-02-15 Ls 产电株式会社 Monitoring system for detecting error of harmonic filter in high voltage direct current (HVDC) system, and monitoring method thereof
CN108226844A (en) * 2017-11-30 2018-06-29 神华集团有限责任公司 The method and system of monitoring voltage mutual inductor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102323478A (en) * 2011-08-23 2012-01-18 华北电力大学(保定) Flexible wide area power grid harmonic synchronous monitoring system
CN103308836A (en) * 2013-05-27 2013-09-18 河南省电力公司鹤壁供电公司 Method, device and system for monitoring insulating property of electronic transformer
CN103308836B (en) * 2013-05-27 2015-08-12 国家电网公司 To the methods, devices and systems that the insulating property of electronic mutual inductor are monitored
CN103541767A (en) * 2013-09-30 2014-01-29 安徽华印机电股份有限公司 Mine safety monitoring system enabling ground and underground to be communicated through wireless network
CN106405192A (en) * 2015-07-30 2017-02-15 Ls 产电株式会社 Monitoring system for detecting error of harmonic filter in high voltage direct current (HVDC) system, and monitoring method thereof
US10345361B2 (en) 2015-07-30 2019-07-09 Lsis Co., Ltd. Monitoring system for detecting error of harmonic filter in high voltage direct current (HVDC) system, and monitoring method thereof
CN105092936A (en) * 2015-08-24 2015-11-25 国网天津市电力公司 Equipment voltage monitoring instrument
CN108226844A (en) * 2017-11-30 2018-06-29 神华集团有限责任公司 The method and system of monitoring voltage mutual inductor

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Granted publication date: 20110817

Termination date: 20120225