CN102955089B - For on-Line Monitor Device and the method thereof of voltage limiter in series capacitor compensation - Google Patents

For on-Line Monitor Device and the method thereof of voltage limiter in series capacitor compensation Download PDF

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Publication number
CN102955089B
CN102955089B CN201210461731.7A CN201210461731A CN102955089B CN 102955089 B CN102955089 B CN 102955089B CN 201210461731 A CN201210461731 A CN 201210461731A CN 102955089 B CN102955089 B CN 102955089B
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voltage limiter
current
series capacitor
capacitor compensation
current transformer
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CN102955089A (en
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崔涛
曾宏
许安
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Sichuan Electric Power Co Ltd
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Sichuan Electric Power Co Ltd
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Abstract

The present invention relates to voltage limiter to detect and protection field, be specifically related to a kind of on-Line Monitor Device for voltage limiter in series capacitor compensation and method thereof, comprise zero-flux current transformer, wide range current transformer, signal pickup assembly, Treatment Analysis device.The present invention is effect: can Timeliness coverage voltage limiter to be in operation produced problem; realize on-line monitoring and the analysis of voltage limiter in conventional string benefit or controlled series compensation; avoid blasting; the safety of proterctive equipment and operations staff; the generation of effective prevention accident; there are great economic benefit and social benefit; the monitoring of voltage limiter in conventional string benefit or controlled series compensation can be widely used in; further have and provide remote communication interface function to monitoring background computer, make the operational factor of voltage limiter, waveform etc. enter the infosystem of control center in real time.

Description

For on-Line Monitor Device and the method thereof of voltage limiter in series capacitor compensation
Technical field
The present invention relates to voltage limiter to detect and protection field, be specifically related to a kind of on-Line Monitor Device for voltage limiter in series capacitor compensation and method thereof.
Background technology
In the use field of current capacitor, no matter be that conventional string is mended or controlled series compensation mode, voltage limiter is all the basic overvoltage protective device of its Capacitor banks.In series capacitor compensation, voltage limiter is all generally adopt many parallel-connection structures, and the current distributing of each valve block post is even or characteristic is consistent to require this voltage limiter to flow through when action.If certain voltage limiter valve block characteristic is inconsistent or that the aging current unevenness resulted through occurs is even, the device damage that capacitor etc. is connected always may be caused, be avoid similar accident occurs, be necessary to carry out status monitoring to the voltage limiter in series capacitor compensation.
Summary of the invention
The object of the present invention is to provide a kind of on-Line Monitor Device for voltage limiter in series capacitor compensation and method thereof, solve and existingly occur that current unevenness is even or characteristic is inconsistent for the voltage limiter in capacitor, easily cause the problem that relevant device is damaged.
For solving above-mentioned technical matters, the present invention by the following technical solutions: a kind of on-Line Monitor Device for voltage limiter in series capacitor compensation, comprising:
The zero-flux current transformer of the Leakage Current produced during for gathering and transmitting voltage limiter fault;
The wide range current transformer of On current during for gathering and transmitting voltage limiter action;
For the On current of voltage limiter, leakage current and action frequency being collected and being converted into digital signal, send the signal pickup assembly of Treatment Analysis device to;
The digital signal sent signal pickup assembly focuses on, analyzes, and draws the Treatment Analysis device of testing result.
Further technical scheme is, above-mentioned zero-flux current transformer and wide range current transformer are installed in the high voltage side of voltage limiter.
Further technical scheme is, 100 μ A ~ 10mA Leakage Currents that above-mentioned zero-flux current transformer produces when being for gathering and transmitting voltage limiter fault, 150A ~ 1500A On current when described wide range current transformer is for gathering and transmitting voltage limiter action.
Further technical scheme is, above-mentioned Treatment Analysis device is connected with central controller by network signal.
In addition, the invention also discloses a kind of on-line monitoring method for voltage limiter in series capacitor compensation, comprise the following steps:
The Leakage Current produced when gathering voltage limiter fault;
Gather On current during voltage limiter action;
The On current of voltage limiter, leakage current and action frequency are collected and is converted into digital signal;
Digital signal is focused on, analyzes, draw testing result.
Further technical scheme is, comprises following step more specifically:
The Leakage Current produced when utilizing zero-flux current transformer collection and transmit voltage limiter fault;
On current when utilizing the collection of wide range current transformer and transmit voltage limiter action;
Utilize signal pickup assembly the On current of voltage limiter, leakage current and action frequency collected and transfer digital signal to, send Treatment Analysis device to;
The digitized signal utilizing Treatment Analysis device to send signal pickup assembly focuses on, analyzes, and draws testing result.
Further technical scheme is, above-mentioned Leakage Current and On current are all gather from the high voltage side of voltage limiter.
Further technical scheme is, the acquisition range of above-mentioned Leakage Current is 100 μ A ~ 10mA, and the acquisition range of On current is 150A ~ 1500A.
Further technical scheme is, above-mentionedly to focus on digital signal, analyzes, after drawing testing result, transfer to control center by network signal.
Compared with prior art, the invention has the beneficial effects as follows: can Timeliness coverage voltage limiter to be in operation produced problem, realize on-line monitoring and the analysis of voltage limiter in conventional string benefit or controlled series compensation, avoid blasting, the safety of proterctive equipment and operations staff, the generation of effective prevention accident, there are great economic benefit and social benefit, the monitoring of voltage limiter in conventional string benefit or controlled series compensation can be widely used in, further have and provide remote communication interface function to monitoring background computer, make the operational factor of voltage limiter, waveforms etc. enter the infosystem of control center in real time.
Accompanying drawing explanation
Fig. 1 is the connection diagram of the present invention for an on-Line Monitor Device embodiment of voltage limiter in series capacitor compensation.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Fig. 1 shows the embodiment of the present invention for the on-Line Monitor Device of voltage limiter in series capacitor compensation: a kind of on-Line Monitor Device for voltage limiter in series capacitor compensation, comprising:
The zero-flux current transformer 2 of the Leakage Current produced during for gathering and transmitting voltage limiter 1 fault;
The wide range current transformer 3 of On current during for gathering and transmitting voltage limiter 1 action;
For the On current of voltage limiter 1, leakage current and action frequency being collected and being converted into digital signal, send the signal pickup assembly 4 of Treatment Analysis device 5 to;
The digital signal sent signal pickup assembly 4 focuses on, analyzes, and draws the Treatment Analysis device 5 of testing result.
A preferred embodiment of the on-Line Monitor Device of voltage limiter in series capacitor compensation is used for according to the present invention, zero-flux current transformer 2 and wide range current transformer 3 are installed in the high voltage side of voltage limiter 1, and the sensitivity when gathering Leakage Current and On current of such sensor is higher.
Another preferred embodiment of the on-Line Monitor Device of voltage limiter in series capacitor compensation is used for according to the present invention, 100 μ A ~ 10mA Leakage Currents that zero-flux current transformer 2 produces when being for gathering and transmitting voltage limiter 1 fault, 150A ~ 1500A On current when described wide range current transformer 3 is for gathering and transmitting voltage limiter 1 action.When the voltage limiter 1 that the series capacitor compensation in transformer station uses occur thunderbolt cause action time, voltage limiter 1 can produce up to hundreds of to the On current of a few kiloampere, and when voltage limiter 1 make moist, the reason such as aging break down time, voltage limiter 1 can produce several milliamperes even leakage current of several microamperes.So the On current gathering voltage limiter 1 has selected the current transformer that range is large, linear degree is high; The leakage current gathering voltage limiter 1 has selected the zero-flux current transformer 2 that precision is relatively high, anti-interference is also very strong.
A preferred embodiment of the on-Line Monitor Device of voltage limiter in series capacitor compensation is used for according to the present invention, Treatment Analysis device 5 is connected with central controller 6 by network signal, namely can realize data remote function in order to means of communication such as too net, optical fiber or GPRS, operations staff directly can understand the ruuning situation of voltage limiter 1 in pulpit by central controller 6.
Another preferred embodiment of the on-Line Monitor Device of voltage limiter in series capacitor compensation is used for according to the present invention, device in the present invention for transmission information can be optical fiber, ripple is less, the noise from power supply can be reduced, and optical fiber is as the carrier of Laser Power Supply, effective isolation high-low voltage, has resisted the interference of extraneous AC noise.
Be used for another preferred embodiment of the on-Line Monitor Device of voltage limiter in series capacitor compensation according to the present invention, after Isolation through harvester inside of On current, leakage current and action frequency and amplifier process, convert digital signal to.
Device in the various embodiments described above all can adopt the electric supply installation 7 connecting 220V power of alterating and direct current to provide energy.
In addition, the invention also discloses an embodiment of the on-line monitoring method for voltage limiter in series capacitor compensation, this embodiment comprises the following steps:
The Leakage Current produced when gathering voltage limiter 1 fault;
Gather On current during voltage limiter 1 action;
The On current of voltage limiter 1, leakage current and action frequency are collected and is converted into digital signal;
Digital signal is focused on, analyzes, draw testing result.
Further technical scheme is, comprises following step more specifically:
The Leakage Current produced when utilizing zero-flux current transformer 2 to gather and transmit voltage limiter 1 fault;
On current when utilizing wide range current transformer 3 to gather and transmit voltage limiter 1 action;
Utilize signal pickup assembly 4 On current of voltage limiter 1, leakage current and action frequency collected and transfer digital signal to, send Treatment Analysis device 5 to;
The digitized signal utilizing Treatment Analysis device 5 pairs of signal pickup assemblies 4 to send focuses on, analyzes, and draws testing result.
Be used for a preferred embodiment of the on-line monitoring method of voltage limiter in series capacitor compensation according to the present invention, above-mentioned Leakage Current and On current are all gather from the high voltage side of voltage limiter 1.
Be used for another preferred embodiment of the on-line monitoring method of voltage limiter in series capacitor compensation according to the present invention, the acquisition range of above-mentioned Leakage Current is 100 μ A ~ 10mA, and the acquisition range of On current is 150A ~ 1500A.
Be used for another preferred embodiment of the on-line monitoring method of voltage limiter in series capacitor compensation according to the present invention, above-mentioned digital signal focused on, analyze, after drawing testing result, transfer to control center by network signal.
Although with reference to multiple explanatory embodiment of the present invention, invention has been described here, but, should be appreciated that, those skilled in the art can design a lot of other amendment and embodiment, these amendments and embodiment will drop within spirit disclosed in the present application and spirit.More particularly, in the scope of, accompanying drawing open in the application and claim, multiple modification and improvement can be carried out to the building block of subject combination layout and/or layout.Except the modification of carrying out building block and/or layout is with except improvement, to those skilled in the art, other purposes also will be obvious.

Claims (7)

1., for an on-Line Monitor Device for voltage limiter in series capacitor compensation, it is characterized in that comprising:
The zero-flux current transformer of the leakage current produced during for gathering and transmitting voltage limiter fault;
The wide range current transformer of On current during for gathering and transmitting voltage limiter action;
For the On current of voltage limiter, leakage current and action frequency being collected and being converted into digital signal, send the signal pickup assembly of Treatment Analysis device to;
The digital signal sent signal pickup assembly focuses on, analyzes, and draws the Treatment Analysis device of testing result;
Described zero-flux current transformer and wide range current transformer are installed in the high voltage side of voltage limiter.
2. the on-Line Monitor Device for voltage limiter in series capacitor compensation according to claim 1, it is characterized in that: the 100 μ A ~ 10mA leakage currents produced when described zero-flux current transformer is for gathering and transmitting voltage limiter fault, 150A ~ 1500A On current when described wide range current transformer is for gathering and transmitting voltage limiter action.
3. the on-Line Monitor Device for voltage limiter in series capacitor compensation according to claim 1, is characterized in that: described Treatment Analysis device is connected with central controller by network signal.
4., for an on-line monitoring method for voltage limiter in series capacitor compensation, it is characterized in that comprising the following steps:
The Leakage Current produced when gathering voltage limiter fault;
Gather On current during voltage limiter action;
The On current of voltage limiter, leakage current and action frequency are collected and is converted into digital signal;
Digital signal is focused on, analyzes, draw testing result;
Be specially:
The leakage current produced when utilizing zero-flux current transformer collection and transmit voltage limiter fault;
On current when utilizing the collection of wide range current transformer and transmit voltage limiter action;
Utilize signal pickup assembly the On current of voltage limiter, leakage current and action frequency collected and transfer digital signal to, send Treatment Analysis device to;
The digitized signal utilizing Treatment Analysis device to send signal pickup assembly focuses on, analyzes, and draws testing result.
5. the on-line monitoring method for voltage limiter in series capacitor compensation according to claim 4, is characterized in that: described leakage current and On current are all gather from the high voltage side of voltage limiter.
6. the on-line monitoring method for voltage limiter in series capacitor compensation according to claim 4, is characterized in that: the acquisition range of described leakage current is 100 μ A ~ 10mA, and the acquisition range of On current is 150A ~ 1500A.
7. the on-line monitoring method for voltage limiter in series capacitor compensation according to claim 4, is characterized in that: describedly to focus on digital signal, analyze, after drawing testing result, transfer to control center by network signal.
CN201210461731.7A 2012-11-16 2012-11-16 For on-Line Monitor Device and the method thereof of voltage limiter in series capacitor compensation Active CN102955089B (en)

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CN104391211B (en) * 2014-12-12 2017-06-06 国网山西省电力公司电力科学研究院 A kind of repair based on condition of component on-line detecting system for series compensation device
CN107525996B (en) * 2017-08-25 2024-04-30 中国电力科学研究院 Online monitoring method and system for leakage current of voltage limiter of series compensation device

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