CN106526294A - Over-voltage monitoring system and monitoring method for transmission line - Google Patents

Over-voltage monitoring system and monitoring method for transmission line Download PDF

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Publication number
CN106526294A
CN106526294A CN201611025250.6A CN201611025250A CN106526294A CN 106526294 A CN106526294 A CN 106526294A CN 201611025250 A CN201611025250 A CN 201611025250A CN 106526294 A CN106526294 A CN 106526294A
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CN
China
Prior art keywords
voltage
over
transmission line
monitoring
electricity
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Pending
Application number
CN201611025250.6A
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Chinese (zh)
Inventor
刘红文
王科
马仪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electric Power Research Institute of Yunnan Power System Ltd
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Electric Power Research Institute of Yunnan Power System Ltd
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Filing date
Publication date
Application filed by Electric Power Research Institute of Yunnan Power System Ltd filed Critical Electric Power Research Institute of Yunnan Power System Ltd
Priority to CN201611025250.6A priority Critical patent/CN106526294A/en
Publication of CN106526294A publication Critical patent/CN106526294A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/16576Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold

Abstract

The invention relates to an over-voltage monitoring system and monitoring method for a transmission line. The system comprises an over-voltage monitoring device, a background data processing device, a high voltage arm capacitor and a low voltage arm capacitor, wherein the high voltage arm capacitor and the low voltage arm capacitor are connected in series with each other. The high voltage arm capacitor comprises a number of ceramic capacitor insulators which are connected in series. One end of the high-voltage arm capacitor is electrically connected with the transmission line to be detected, and the other end is electrically connected with one end of the low voltage arm capacitor. The low voltage arm capacitor comprises a ceramic capacitor insulator. The other end of the low voltage arm capacitor is grounded through a tower. The over-voltage monitoring device is arranged on the tower. The input end of the over-voltage monitoring device is electrically connected with both ends of the low voltage arm capacitor. The over-voltage monitoring device is communicatively connected with the background data processing device. The advantages of high dielectric strength, good mechanical properties, cheap price and the like of the ceramic capacitor insulators are used. The insulators are no longer directly hung on the transmission line. The over-voltage of the transmission line to be detected is monitored in real time. Over-voltage data are completely and accurately recorded.

Description

A kind of transmission line of electricity over-voltage monitoring system and monitoring method
Technical field
The present invention relates to Hyper-Voltage of Power Systems monitoring technical field, more particularly to a kind of transmission line of electricity over-voltage monitoring system System and monitoring method.
Background technology
In power system, monitoring transmission line of electricity over-voltage condition for obtain real transmission line of electricity overvoltage data, Analysis Overvoltage, improvement line insulation coordinate, improve the Lighting Protection Measures of overhead transmission line and ensure power system peace Row for the national games is significant.
Over-voltage monitoring system is generally divided into contact over-voltage monitoring system and contactless over-voltage monitoring system.Mesh In front power system, conventional over-voltage monitoring system is contact over-voltage monitoring system.Contact over-voltage monitoring system It is in transformer station or on transmission line of electricity, to install capacitive divider additional, overvoltage signal, Jing coaxial electricals is obtained by capacitive divider Overvoltage signal is transferred to data acquisition unit by cable.
But, for extra high voltage network and distribution transmission line of electricity, on the one hand, install capacitive divider high cost additional, increase Plus operation maintenance workload, on the other hand, once capacitive divider occurs insulation fault, over-voltage monitoring system operation will be increased Risk, the problems such as cause monitoring result inaccurate.
The content of the invention
To overcome problem present in correlation technique, the present invention to provide a kind of transmission line of electricity over-voltage monitoring system and monitoring Method.
A kind of first aspect according to embodiments of the present invention, there is provided transmission line of electricity over-voltage monitoring system, including:Overvoltage Monitoring device, back-end data processing meanss, the high voltage arm capacitor being serially connected and low-voltage arm electric capacity, wherein:
The high voltage arm capacitor includes the ceramic condenser insulator of some series connection, one end of the high voltage arm capacitor with it is to be measured Transmission line of electricity electrical connection, the other end are electrically connected with one end of the low-voltage arm electric capacity;
The low-voltage arm electric capacity includes a ceramic condenser insulator, and the other end of the low-voltage arm electric capacity is connect by tower body Ground;
The over-voltage monitoring device is arranged on the tower body, the input electrical connection institute of the over-voltage monitoring device State the two ends of low-voltage arm electric capacity;
The over-voltage monitoring device is communicated to connect with the back-end data processing meanss.
Preferably, the ceramic condenser interior insulator arranges high voltage ceramic capacitor.
Preferably, the overvolatge device includes electricity-getting mutual inductor and data acquisition process and transmitting device, wherein,
One end of the electricity-getting mutual inductor primary winding connects one end of the low-voltage arm electric capacity, other end ground connection, described to take One end of electric transformer auxiliary winding is electrically connected with the input of the data acquisition process and transmitting device, other end ground connection;Institute State the one end of the signal input part of data acquisition process and transmitting device by signal transmssion line with the low-voltage arm electric capacity to be electrically connected Connect.
Preferably, the data acquisition process and transmitting device include the data collection processor being electrically connected to each other and first Radio transmitting device, the signal input part of the data collection processor pass through signal transmssion line and the one of the low-voltage arm electric capacity End connection.
Preferably, the back-end data processing meanss include back-end data processor and are wirelessly transferred with described first The second radio transmitting device that device matches.
A kind of second aspect according to embodiments of the present invention, there is provided transmission line of electricity over-voltage monitoring method, including:
S001:The phase voltage of real-time monitoring transmission line of electricity to be measured;
S002:Judge whether the phase voltage is overvoltage;If so, execution step S003;
S003:The phase voltage data of record 100ms;
S004:Judge whether the voltage magnitude in the phase voltage data changes;If so, execution step S005,;If No, return to step S003 continues the phase voltage data of record 100ms;
S005:Stop recording, and by the data is activation back-end data processing meanss.
The technical scheme that embodiments of the invention are provided can include following beneficial effect:
A kind of transmission line of electricity over-voltage monitoring system provided in an embodiment of the present invention, including:Over-voltage monitoring device, backstage Data processing equipment, the high voltage arm capacitor being serially connected and low-voltage arm electric capacity, wherein:The high voltage arm capacitor includes some series connection Ceramic condenser insulator, one end of the high voltage arm capacitor is electrically connected with transmission line of electricity to be measured, the other end and the low-voltage arm One end electrical connection of electric capacity;The low-voltage arm electric capacity includes a ceramic condenser insulator, the other end of the low-voltage arm electric capacity It is grounded by tower body;The over-voltage monitoring device is arranged on the tower body, the input electricity of the over-voltage monitoring device Connect the two ends of the low-voltage arm electric capacity;The over-voltage monitoring device is communicated to connect with the back-end data processing meanss.Profit The advantages of with ceramic condenser insulator dielectric intensity height, good mechanical property, low price, replace existing insulator or directly hang over On transmission line of electricity, while as voltage divider system real-time monitoring transmission line of electricity overvoltage to be measured, complete and accurate ground record overvoltage number According to, so as to judge overvoltage species, can be Hyper-Voltage of Power Systems suppression action quick response and suppression strategy formulation Scientific basis is provided, and effective solution is provided for power system transmission line over-voltage monitoring.Meanwhile, can be used for power transmission line The spark gap status monitoring on road, fault location and route selection;To instructing trouble shooting, trouble shoot of power system device etc. to have Significance.
It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary and explanatory, not The present invention can be limited.
Description of the drawings
During accompanying drawing herein is merged in description and the part of this specification is constituted, show the enforcement for meeting the present invention Example, and be used for explaining the principle of the present invention together with description.
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, for those of ordinary skill in the art Speech, without having to pay creative labor, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is a kind of structural representation of transmission line of electricity over-voltage monitoring system provided in an embodiment of the present invention;
Fig. 2 is that a kind of equivalent circuit structure of transmission line of electricity over-voltage monitoring system provided in an embodiment of the present invention is illustrated Figure;
Fig. 3 is a kind of schematic flow sheet of transmission line of electricity over-voltage monitoring method provided in an embodiment of the present invention;
In Fig. 1-3, symbol is represented:1- over-voltage monitoring devices, 11- electricity-getting mutual inductors, 12- data acquisition process and transmission Device, 13- signal transmssion lines, 2- back-end data processing meanss, 3- ceramic condenser insulators, C1- high voltage arm capacitors, C2- low pressure Arm electric capacity.
Specific embodiment
Here in detail exemplary embodiment will be illustrated, its example is illustrated in the accompanying drawings.Explained below is related to During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment Described in embodiment do not represent and the consistent all embodiments of the present invention.Conversely, they be only with as appended by The example of consistent apparatus and method in terms of some described in detail in claims, the present invention.
The embodiment of the present invention provides a kind of transmission line of electricity over-voltage monitoring system, referring to Fig. 1 and Fig. 2, including:Overvoltage is supervised Survey device 1, back-end data processing meanss 2, high voltage arm capacitor C1 being serially connected and low-voltage arm electric capacity C2.
One end of high voltage arm capacitor C1 is electrically connected with transmission line of electricity to be measured, the other end is with the low-voltage arm electric capacity C2's One end electrically connects, and the other end of the low-voltage arm electric capacity C2 is grounded by tower body.
As shown in figure 1, high voltage arm capacitor C1 includes the ceramic condenser insulator 3 of some series connection, the low-voltage arm electricity Holding C2 includes a ceramic condenser insulator 3.In embodiments of the present invention, it is made up of the ceramic condenser insulator 3 of some series connection High voltage arm capacitor C1 constitute voltage divider system with the low-voltage arm electric capacity C2 that is made up of a ceramic condenser insulator 3, The voltage divider system can be directly connected to transmission line of electricity, tower body or directly replace electric transmission line isolator.In specific implementation process In, high voltage arm capacitor C1 that is made up of the ceramic condenser insulator 3 of some series connection with by 3 structure of ceramic condenser insulator Into the low-voltage arm electric capacity C2 to constitute the intrinsic standoff ratio of voltage divider system be any number between 500-3000, user can be according to reality Border situation, takes any number between 500-3000.
High voltage ceramic capacitor is set inside the ceramic condenser insulator 3, high voltage ceramic capacitor has dielectric strength The features such as height, small volume, frequency characteristic are good, can utilize the feature, be encapsulated inside insulation column or be manufactured into high insulation The various transmission line of electricity ceramic condenser insulator of intensity, is joined directly together with transmission line of electricity, is constituted voltage divider system, is realized power system Over-voltage monitoring and energy is taken online.In specific implementation process, the ceramic condenser insulator 3 includes that pin type ceramic condenser insulate Son, pillar ceramic condenser insulator, suspension type ceramic condenser insulator, butterfly ceramic condenser insulator, porcelain pole arm ceramic condenser The combination of one or more in insulator.
Voltage divider system is constituted using ceramic condenser insulator to be directly connected with transmission line of electricity, voltage divider system and power taking and partial pressure Device is acted on, and although ceramic condenser insulator capacitance varies with temperature can occur minor variations, but for transmission line of electricity overvoltage Monitoring fully meets requirement, can install the difficult problem for solving line over-voltage monitoring in a large number, be research transmission of electricity on transmission line of electricity Line over-voltage provides real data with the propagation characteristic of Insulation Coordination and overvoltage.
The over-voltage monitoring device 1 is arranged on the tower body, the input electrical connection of the over-voltage monitoring device 1 The two ends of the low-voltage arm electric capacity C2, the over-voltage monitoring device 1 are communicated to connect with the back-end data processing meanss 2.Institute Over-voltage monitoring device 1 is stated for detecting the over-voltage condition of transmission line of electricity to be measured, and by the overvoltage number of transmission line of electricity to be measured According to being sent to the back-end data processing meanss 2.
In embodiments of the present invention, the overvolatge device 1 includes electricity-getting mutual inductor 11 and data acquisition process and transmission Device 12.
One end of 11 primary winding of the electricity-getting mutual inductor connects one end of the low-voltage arm electric capacity C2, other end ground connection, institute The one end for stating 11 auxiliary winding of electricity-getting mutual inductor is electrically connected with the input of the data acquisition process and transmitting device 12, the other end Ground connection.The High Level AC Voltage that voltage divider system is obtained is switched to low-voltage DC by the electricity-getting mutual inductor, and the low-voltage DC is used In powering to the data acquisition process and transmitting device 12, the data acquisition process and transmitting device 12 is matched somebody with somebody again Standby power supply.
The signal input part of the data acquisition process and transmitting device 12 passes through signal transmssion line 13 and the low-voltage arm One end electrical connection of electric capacity C2.In specific implementation process, the signal transmssion line 13 includes coaxial cable, the coaxial cable Containing internal resistance R, as shown in Fig. 2 preventing from vibrating the accuracy for affecting test result.
In embodiments of the present invention, the data acquisition process and transmitting device 12 include the data acquisition being electrically connected to each other Processor and the first radio transmitting device, the signal input part of the data collection processor by signal transmssion line 13 with it is described One end electrical connection of low-voltage arm electric capacity C2.The data collection processor is used for gathered data, first radio transmitting device For the data is activation that gathers the data collection processor to back-end data processing meanss 2.
The back-end data processing meanss 2 include back-end data processor and with the first radio transmitting device phase Second radio transmitting device of matching.Second radio transmitting device is used to receive what first radio transmitting device sent Data, the back-end data processor process the data for obtaining.
In specific implementation process, first radio transmitting device and the second radio transmitting device include what is be mutually matched GPRS transmission device.
A kind of transmission line of electricity over-voltage monitoring system provided in an embodiment of the present invention, including:Over-voltage monitoring device, backstage Data processing equipment, the high voltage arm capacitor being serially connected and low-voltage arm electric capacity, wherein:The high voltage arm capacitor includes some series connection Ceramic condenser insulator, one end of the high voltage arm capacitor is electrically connected with transmission line of electricity to be measured, the other end and the low-voltage arm One end electrical connection of electric capacity;The low-voltage arm electric capacity includes a ceramic condenser insulator, the other end of the low-voltage arm electric capacity It is grounded by tower body;The over-voltage monitoring device is arranged on the tower body, the input electricity of the over-voltage monitoring device Connect the two ends of the low-voltage arm electric capacity;The over-voltage monitoring device is communicated to connect with the back-end data processing meanss.Profit The advantages of with ceramic condenser insulator dielectric intensity height, good mechanical property, low price, replace existing insulator or directly hang over On transmission line of electricity, while as voltage divider system real-time monitoring transmission line of electricity overvoltage to be measured, complete and accurate ground record overvoltage number According to, so as to judge overvoltage species, can be Hyper-Voltage of Power Systems suppression action quick response and suppression strategy formulation Scientific basis is provided, and effective solution is provided for power system transmission line over-voltage monitoring.Meanwhile, can be used for power transmission line The spark gap status monitoring on road, fault location and route selection;To instructing trouble shooting, trouble shoot of power system device etc. to have Significance.
Based on identical technology design, the embodiment of the present invention additionally provides a kind of transmission line of electricity over-voltage monitoring method, ginseng See Fig. 3, including:
S001:The phase voltage of real-time monitoring transmission line of electricity to be measured.
Over-voltage monitoring device is connected to into the two ends of the low-voltage arm electric capacity C2, installed in transmission line of electricity head tower to be measured On tower body, implement the phase voltage of monitoring transmission line of electricity to be measured.
S002:Judge whether the phase voltage is overvoltage.If so, execution step S003.
When system is normally run, the voltage that over-voltage monitoring device is detected is system phase voltageIt is mutually electric when detecting Press and beWhen or when detecting high-frequency signal that phase voltage contains 500Hz~2kHz, the phase voltage is overvoltage.Work as institute State phase voltage for overvoltage when, execution step S003.
S003:The phase voltage data of record 100ms.
Log-on data Acquisition Processor, records the phase voltage data of 100ms.
S004:Judge whether the voltage magnitude in the phase voltage data changes.If so, execution step S005,;If No, return to step S003 continues the phase voltage data of record 100ms.
S005:Stop recording, and by the data is activation back-end data processing meanss.
When stop recording, the data that the data collection processor is gathered are sent to by the first radio transmitting device Background computer processing system.This method energy complete and accurate ground record overvoltage data, so as to judge overvoltage species, Neng Gouwei The formulation of the quick response and suppression strategy of Hyper-Voltage of Power Systems suppression action provides scientific basis, is power system power transmission line Pass by voltage monitoring and effective solution is provided.Meanwhile, can be used for the spark gap status monitoring of transmission line of electricity, fault location and Route selection;To instructing trouble shooting, the trouble shoot of power system device etc. significant.
Those skilled in the art will readily occur to its of the present invention after considering description and putting into practice disclosure of the invention here Its embodiment.The application is intended to any modification of the present invention, purposes or adaptations, these modifications, purposes or Person's adaptations follow the general principle of the present invention and including the undocumented common knowledge in the art of the present invention Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following Claim is pointed out.
It should be appreciated that the precision architecture for being described above and being shown in the drawings is the invention is not limited in, and And various modifications and changes can be being carried out without departing from the scope.The scope of the present invention is limited only by appended claim.

Claims (6)

1. a kind of transmission line of electricity over-voltage monitoring system, it is characterised in that include:At over-voltage monitoring device (1), back-end data Reason device (2), the high voltage arm capacitor (C1) being serially connected and low-voltage arm electric capacity (C2), wherein:
Ceramic condenser insulator (3) of the high voltage arm capacitor (C1) including some series connection, the one of the high voltage arm capacitor (C1) End is electrically connected with transmission line of electricity to be measured, the other end is electrically connected with one end of the low-voltage arm electric capacity (C2);
The low-voltage arm electric capacity (C2) includes a ceramic condenser insulator (3), and the other end of the low-voltage arm electric capacity (C2) leads to Cross tower body ground connection;
The over-voltage monitoring device (1) is arranged on the tower body, the input electrical connection of the over-voltage monitoring device (1) The two ends of the low-voltage arm electric capacity (C2);
The over-voltage monitoring device (1) is communicated to connect with the back-end data processing meanss (2).
2. transmission line of electricity over-voltage monitoring system according to claim 1, it is characterised in that the ceramic condenser insulator (3) it is internal that high voltage ceramic capacitor is set.
3. transmission line of electricity over-voltage monitoring system according to claim 1, it is characterised in that the overvolatge device (1) Including electricity-getting mutual inductor (11) and data acquisition process and transmitting device (12), wherein,
One end of electricity-getting mutual inductor (11) primary winding connects one end of the low-voltage arm electric capacity (C2), other end ground connection, institute The one end for stating electricity-getting mutual inductor (11) auxiliary winding electrically connected with the input of the data acquisition process and transmitting device (12), another One end is grounded;The signal input part of the data acquisition process and transmitting device (12) is low with described by signal transmssion line (13) One end electrical connection of pressure arm electric capacity (C2).
4. transmission line of electricity over-voltage monitoring system according to claim 3, it is characterised in that the data acquisition process and Transmitting device (12) includes the data collection processor being electrically connected to each other and the first radio transmitting device, the data acquisition process The signal input part of device is connected with one end of the low-voltage arm electric capacity (C2) by signal transmssion line (13).
5. transmission line of electricity over-voltage monitoring system according to claim 4, it is characterised in that the back-end data processes dress Put the second radio transmitting device that (2) match including back-end data processor and with first radio transmitting device.
6. a kind of transmission line of electricity over-voltage monitoring method, it is characterised in that include:
S001:The phase voltage of real-time monitoring transmission line of electricity to be measured;
S002:Judge whether the phase voltage is overvoltage;If so, execution step S003;
S003:The phase voltage data of record 100ms;
S004:Judge whether the voltage magnitude in the phase voltage data changes;If so, execution step S005,;If it is not, returning Step S003 is returned, continues the phase voltage data of record 100ms;
S005:Stop recording, and by the data is activation back-end data processing meanss.
CN201611025250.6A 2016-11-18 2016-11-18 Over-voltage monitoring system and monitoring method for transmission line Pending CN106526294A (en)

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Application Number Priority Date Filing Date Title
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Cited By (6)

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Publication number Priority date Publication date Assignee Title
CN108333421A (en) * 2017-12-04 2018-07-27 国网浙江省电力有限公司电力科学研究院 High-tension cable overvoltage test device and its method
CN108896885A (en) * 2018-07-11 2018-11-27 云南电网有限责任公司电力科学研究院 A kind of distribution transformer shelf depreciation and over-voltage monitoring equipment
CN109387745A (en) * 2018-12-21 2019-02-26 云南电网有限责任公司电力科学研究院 A kind of power distribution network over-voltage sensing device
CN109581170A (en) * 2018-12-06 2019-04-05 贵州电网有限责任公司 A kind of high frequency response bandwidth Lightning Over-voltage on-line monitoring system
CN110514944A (en) * 2019-07-05 2019-11-29 国网陕西省电力公司电力科学研究院 Take electricity with measurement in the fault detector of one based on capacitance partial pressure
CN110927620A (en) * 2019-09-10 2020-03-27 重庆大学 Sleeve with winding deformation and overvoltage on-line monitoring sensor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108333421A (en) * 2017-12-04 2018-07-27 国网浙江省电力有限公司电力科学研究院 High-tension cable overvoltage test device and its method
CN108896885A (en) * 2018-07-11 2018-11-27 云南电网有限责任公司电力科学研究院 A kind of distribution transformer shelf depreciation and over-voltage monitoring equipment
CN109581170A (en) * 2018-12-06 2019-04-05 贵州电网有限责任公司 A kind of high frequency response bandwidth Lightning Over-voltage on-line monitoring system
CN109387745A (en) * 2018-12-21 2019-02-26 云南电网有限责任公司电力科学研究院 A kind of power distribution network over-voltage sensing device
CN110514944A (en) * 2019-07-05 2019-11-29 国网陕西省电力公司电力科学研究院 Take electricity with measurement in the fault detector of one based on capacitance partial pressure
CN110927620A (en) * 2019-09-10 2020-03-27 重庆大学 Sleeve with winding deformation and overvoltage on-line monitoring sensor
CN110927620B (en) * 2019-09-10 2021-05-04 重庆大学 Sleeve with winding deformation and overvoltage on-line monitoring sensor

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