CN205539343U - Integration probe is put in office based on electric capacity divides platen press VFTO measuring transducer - Google Patents

Integration probe is put in office based on electric capacity divides platen press VFTO measuring transducer Download PDF

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Publication number
CN205539343U
CN205539343U CN201620312199.6U CN201620312199U CN205539343U CN 205539343 U CN205539343 U CN 205539343U CN 201620312199 U CN201620312199 U CN 201620312199U CN 205539343 U CN205539343 U CN 205539343U
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China
Prior art keywords
capacitance
partial pressure
office
voltage
electric capacity
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CN201620312199.6U
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马国明
李志兵
唐志国
李成榕
王宁华
刘鹏
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Beijing Huadian Zhicheng Electrical Equipment Co Ltd
North China Electric Power University
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Beijing Huadian Zhicheng Electrical Equipment Co Ltd
North China Electric Power University
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Abstract

The utility model discloses an integration probe is put in office based on electric capacity divides platen press VFTO measuring transducer belongs to high -tension apparatus partial discharge on -line measuring technical field. Its include alternating voltage source V1, probe to GIS guide arm electric capacity C1, probe capacitance to ground C0, electric capacity partial pressure box, cable T1, secondary electric capacity partial pressure box, oscilloscope, electric capacity partial pressure box through first port and second port and probe to electric capacity C0 after parallelly connected again with voltage source V1, probe to the series connection of GIS guide arm electric capacity C1, one time electric capacity partial pressure box is connected in cable T1's one end through the third port, secondary electric capacity partial pressure box is parallelly connected with oscilloscope through first port and second port, and secondary electric capacity partial pressure box is connected in cable T1's the other end through the third port. Adopting the superfrequency method to measure partial discharge, installing inside GIS, can effectively restrain external disturbance, sensitivity is high, is that monitoring ways is put in a very effectual office, has compensatied present special high -pressure system office and has put the not enough of monitoring.

Description

The charging integrated probe of office of sensor is measured based on capacitance partial pressure method VFTO
Technical field
This utility model relates to high pressure equipment shelf depreciation online measuring technique field, particularly relates to a kind of base The charging integrated probe of office of sensor is measured in capacitance partial pressure method VFTO.
Background technology
In recent years, along with the development of ultra-high voltage AC transmission technology, gas-insulated switchgear (Gas-insulated Metal-enclosed Switchgear, GIS) obtains wide at ultra-high voltage transformer station General application.In GIS, disconnecting switch is when the unloaded short bus of folding, can produce very fast transient overvoltage (Very Fast Transient Overvoltage, VFTO), the winding device insulation to GIS and connection thereof produces shadow Ring.Research before shows, GIS disconnecting switch can produce frequency MHz up to a hundred, rising edge number ns when operation VFTO, its actual measurement maximum up to 2.27 times of reference values.Along with the raising of transmission system electric pressure, electricity The insulation margin of gas equipment can reduce, and the harm that VFTO causes on extra-high voltage equipment will be bigger.Meanwhile, every Transient state housing current potential (Transient Enclosure Voltage, TEV) and electricity can be produced from switching manipulation Magnetic harass, to GIS and close on secondary device insulation produce threaten, disturb it properly functioning, and threaten fortune Administrative staff's safety.Along with the raising of system voltage grade, VFTO, TEV and electromagnetic disturbance are increasingly severe, shadow Ring the most increasing.When UHVAC demonstration project puts into operation, because worrying above-mentioned harm, extra-high voltage GIS The most non-hot line job of disconnecting switch, runs to system and brings great inconvenience, need badly and carry out extra-high voltage GIS Equipment VFTO studies.
In order to solve this outstanding problem of ultra-high voltage GIS equipment VFTO that extra-high voltage project faces, within 2009, rise, State Grid Corporation of China sets up the project, and by exchange, the Ministry of Construction takes the lead, tissue China DianKeYuan, state's net power science research Institute, North China Electric Power University, Tsing-Hua University, Xi'an Communications University, Pinggao Electric Co., Ltd., Henan put down High and Xi'an western electric switch Electric Applicance Co., Ltd, carries out the production, teaching & research of ultra-high voltage GIS equipment VFTO and attacks with combining Closing, brainstorm project was divided into for two phases, and had obtained country 973 plan " alternating current-direct current system for ultra-high voltage transmission electromagnetism Study with the underlying issue of insulation characterisitic " support.
Office is placed on line context of detection and illustrates as a example by GIS.In recent years, GIS partial discharge on-line monitoring system System application in electrical network is increasingly extensive, has taken on a certain scale.Main test philosophy includes superfrequency Method (Ultra High Frequency, UHF), detection frequency band is between 300MHz~1500MHz, and it has Have that capacity of resisting disturbance is strong, sensitivity high, and this contactless metering system sets for secondary For standby and testing staff the most safer, system structure is simple, is particularly suitable for on-line monitoring, thus than In other detection method, there is obvious advantage.In all parts of the country by superfrequency on-line monitoring with charged in recent years Test is found that a large amount of GIS internal flaw case so that it is become current GIS on-line checking field most important Detection means.
But existing ultra-high voltage GIS equipment scene office puts and generally there is detection sensitivity in monitoring not and anti- The problem of interference performance difference.
Utility model content
In view of this, this utility model provides a kind of office based on capacitance partial pressure method VFTO measurement sensor to put one Bodyization is popped one's head in, and it uses superfrequency method to measure shelf depreciation, is installed on inside GIS, can effectively suppress extraneous Interference, highly sensitive, thus more suitable for practicality.
In order to reach above-mentioned first purpose, measuring based on capacitance partial pressure method VFTO that this utility model provides passes The technical scheme of the charging integrated probe of office of sensor is as follows:
The charging integrated probe of office based on capacitance partial pressure method VFTO measurement sensor that this utility model provides includes Alternating-current voltage source V1, probe to GIS guide rod electric capacity C1, probe direct-to-ground capacitance CO, capacitance partial pressure box, Cable T1, secondary capacitance partial pressure box, oscillograph,
A described capacitance partial pressure box is in parallel with described probe direct-to-ground capacitance CO by the first port and the second port After again with described voltage source V1, probe GIS guide rod electric capacity C1 is connected, a described capacitance partial pressure box passes through 3rd port is connected to one end of described cable T1;
Described secondary capacitance partial pressure box is in parallel with described oscillograph by the first port and the second port, and described two Secondary capacitance partial pressure box is connected to the other end of described cable T1 by the 3rd port.
The charging integrated probe of office based on capacitance partial pressure method VFTO measurement sensor that this utility model provides also may be used It is applied to the following technical measures to achieve further.
As preferably, described probe is 1pF to GIS guide rod electric capacity C1, and described probe direct-to-ground capacitance C0 is 1nF。
As preferably, in a capacitance partial pressure box, it is provided with electric capacity C2, build-out resistor in a capacitance partial pressure box box Rm,
First port of a described capacitance partial pressure box is in electric capacity C2 and institute in a described capacitance partial pressure box box State between build-out resistor Rm,
Second port of a described capacitance partial pressure box is in electric capacity C2 and in a described capacitance partial pressure box box Between one ground voltage D1,
In a described capacitance partial pressure box box, electric capacity C2 is 1200pF, and described build-out resistor Rm is 50 Ω.
As preferably, in described secondary capacitance partial pressure box, include capacitor high voltage resistance R1, high-voltage capacitance C3, benefit Fill low-voltage capacitance C4,
After described capacitor high voltage resistance R1 is in parallel with described high-voltage capacitance C3 again with the second ground voltage D2, supplement low Voltage capacitance C4 is connected,
First port of described secondary capacitance partial pressure box is in described high-tension resistive R1, high-voltage capacitance C3, supplements Between low-voltage capacitance C4,
First port of described secondary capacitance partial pressure box be in described supplementary low-voltage capacitance C4 and described ground voltage it Between,
Described capacitor high voltage resistance R1 is 20M Ω, high-voltage capacitance C3 is 2pF, supplement the value of low-voltage capacitance C4 Adjustable.
As preferably, described oscillograph includes oscillograph access resistance R0, oscillograph entrance capacitance C0,
Parallel connection between described oscillograph access resistance R0, oscillograph entrance capacitance C0,
Described oscillograph access resistance R0 is 1M Ω, and described oscillograph entrance capacitance C0 is 13pF.
As preferably, the described charging integrated probe of office based on capacitance partial pressure method VFTO measurement sensor also includes Measuring circuit, VFTO measuring circuit, secondary lumped capacity, host computer acquisition system are put in switching switch, office,
Described secondary lumped capacity is arranged in described VFTO measuring circuit;
Described switching switch puts measuring circuit or described VFTO measuring circuit for alternatively connecting described office;
Described host computer acquisition system is for described switching switch transmitting control commands so that described switching is opened Close to put in described office and carry out between measuring circuit or described VFTO measuring circuit selecting a property switching.
As preferably, described host computer acquisition system sends control by remote data transmission to described switching switch System order.
As preferably, the communication mode between described host computer acquisition system and described switching switch is channel radio Letter or wire communication.
As preferably, described radio communication is selected from Bluetooth technology, Wi-Fi, 4G, in 3G, GPRS, zigbee One.
As preferably, described wire communication selected from RS-232, RS-485, USB, I2C, TWI, SPI, 1WIRE, One in Ethernet interface.
The charging integrated probe of office based on capacitance partial pressure method VFTO measurement sensor that this utility model provides includes Alternating-current voltage source V1, probe to GIS guide rod electric capacity C1, probe direct-to-ground capacitance C0, capacitance partial pressure box, Cable T1, secondary capacitance partial pressure box, oscillograph, a capacitance partial pressure box is by the first port and the second port With voltage source V1, probe, GIS guide rod electric capacity C1 is connected, once again with after probe direct-to-ground capacitance C0 parallel connection Capacitance partial pressure box is connected to one end of cable T1 by the 3rd port;Secondary capacitance partial pressure box passes through the first port In parallel with oscillograph with the second port, secondary capacitance partial pressure box is connected to another of cable T1 by the 3rd port End.It is measured frequency band and reaches 5.3Hz-163Hz, uses superfrequency method to measure shelf depreciation, is installed in GIS Portion, can effectively suppress external interference, highly sensitive, is that monitoring means is put in a kind of very effective office, makes up The deficiency of monitoring is put in current extra-high voltage system office.
Accompanying drawing explanation
By reading the detailed description of hereafter preferred implementation, various other advantage and benefit for ability Territory those of ordinary skill will be clear from understanding.Accompanying drawing is only used for illustrating the purpose of preferred implementation, and also It is not considered as restriction of the present utility model.And in whole accompanying drawing, it is denoted by the same reference numerals phase Same parts.In the accompanying drawings:
The office based on capacitance partial pressure method VFTO measurement sensor that Fig. 1 provides for this utility model embodiment puts one The circuit theory diagrams of bodyization probe;
Fig. 2 is for when input voltage beingTime, this utility model embodiment provide based on Capacitance partial pressure method VFTO measures the voltage-frequency change that the charging integrated probe of office of sensor shows on oscillograph Change relation schematic diagram;
Fig. 3 is for when guide rod voltage beingTime, this utility model embodiment provide based on Capacitance partial pressure method VFTO measures the amplitude-frequency response voltage of voltage on office's charging integrated probe N head fuse of sensor -frequency variation relation schematic diagram;
The office based on capacitance partial pressure method VFTO measurement sensor that Fig. 4 provides for this utility model embodiment puts one Bodyization probe and switching switch the typical structure schematic diagram of fit applications.
Detailed description of the invention
This utility model is to solve the problem that prior art exists, it is provided that a kind of based on the survey of capacitance partial pressure method VFTO The charging integrated probe of office of quantity sensor, its use superfrequency method measure shelf depreciation, be installed on inside GIS, Can effectively suppress external interference, highly sensitive, thus more suitable for practicality.
By further illustrate technological means that this utility model taked by reaching predetermined utility model purpose and Effect, below in conjunction with accompanying drawing and preferred embodiment, to according to the utility model proposes based on capacitance partial pressure method The charging integrated probe of office of VFTO measurement sensor, its detailed description of the invention, structure, feature and effect thereof, After describing in detail such as.In the following description, different " embodiment " or " embodiment " refers to not necessarily It it is same embodiment.Additionally, special characteristic, structure or feature in one or more embodiment can be by any Suitable form combines.
The terms "and/or", a kind of incidence relation describing affiliated partner, expression can be deposited In three kinds of relations, such as, A and/or B, concrete is interpreted as: can include A and B, Ke Yidan simultaneously Solely there is A, it is also possible to individualism B, it is possible to possess above-mentioned three kinds of any one situations.
Embodiment one
Seeing accompanying drawing 1, what this utility model embodiment provided measures sensor based on capacitance partial pressure method VFTO Office charging integrated probe include alternating-current voltage source V1, probe to GIS guide rod electric capacity C1, probe direct-to-ground capacitance C0, Capacitance partial pressure box, cable T1, secondary capacitance partial pressure box, an oscillograph, capacitance partial pressure box is by the After Single port and the second port are in parallel with probe direct-to-ground capacitance C0 again with voltage source V1, probe to GIS guide rod electricity Holding C1 series connection, a capacitance partial pressure box is connected to one end of cable T1 by the 3rd port;Secondary electric capacity divides Pressure box is in parallel with oscillograph by the first port and the second port, and secondary capacitance partial pressure box is by the 3rd port even It is connected to the other end of cable T1.
The office based on capacitance partial pressure method VFTO measurement sensor that this utility model embodiment one provides is charging integrated Probe includes that alternating-current voltage source V1, probe are to GIS guide rod electric capacity C1, probe direct-to-ground capacitance C0, an electric capacity Dividing potential drop box, cable T1, secondary capacitance partial pressure box, oscillograph, capacitance partial pressure box by the first port and With voltage source V1, probe, GIS guide rod electric capacity C1 is gone here and there again after second port is in parallel with probe direct-to-ground capacitance C0 Connection, a capacitance partial pressure box is connected to one end of cable T1 by the 3rd port;Secondary capacitance partial pressure box passes through First port and the second port are in parallel with oscillograph, and secondary capacitance partial pressure box is connected to cable by the 3rd port The other end of T1.Measure frequency band and reach 5.3Hz-163Hz, use superfrequency method to measure shelf depreciation, install Inside GIS, can effectively suppress external interference, highly sensitive, it is that monitoring hands is put in a kind of very effective office Section, compensate for current extra-high voltage system office and puts the deficiency of monitoring.
See accompanying drawing 2, for when input voltage beingTime, this utility model embodiment carries The voltage that the charging integrated probe of office based on capacitance partial pressure method VFTO measurement sensor of confession shows on oscillograph In-frequency variation relation schematic diagram, flat amplitude is 1.89V.Measuring Systems Theory intrinsic standoff ratio is 466666, consistent with former calibration result (478425,468353).Under VFTO probe no-load condition, phase When in the case of load open circuit, power frequency, N head fuse voltage-to-ground peak value is 88.2V, and N is pressure for 2000V, Risk will not be produced.
See accompanying drawing 3, when guide rod voltage isTime this utility model embodiment provide The amplitude-frequency response of voltage on office's charging integrated probe N head fuse of sensor is measured based on capacitance partial pressure method VFTO In voltage-frequency variation relation schematic diagram, power frequency situation voltage is 1.39mV, thunder and lightning frequency range (500kHz) Voltage is 13V, there is not any insulation risk.Simulation office puts test result and shows, in laboratory conditions Sensor detection sensitivity is put up to 5pC in VFTO office.From this it can be concluded that VFTO probe is removing two In the case of secondary lumped capacity module, sensor can be put as office completely and use.
Wherein, probe is 1pF to GIS guide rod electric capacity C1, and probe direct-to-ground capacitance C0 is 1nF.
Wherein, in a capacitance partial pressure box, it is provided with electric capacity C2, build-out resistor Rm in a capacitance partial pressure box box, First port of capacitance partial pressure box be in a capacitance partial pressure box box electric capacity C2 and build-out resistor Rm it Between, the second port of a capacitance partial pressure box is in electric capacity C2 and the first ground voltage in a capacitance partial pressure box box Between D1, in a capacitance partial pressure box box, electric capacity C2 is 1200pF, and build-out resistor Rm is 50 Ω.
Wherein, include capacitor high voltage resistance R1, high-voltage capacitance C3 in secondary capacitance partial pressure box, supplement low tension Hold C4, after capacitor high voltage resistance R1 is in parallel with high-voltage capacitance C3 again with the second ground voltage D2, supplementary low tension Holding C4 series connection, the first port of secondary capacitance partial pressure box is in high-tension resistive R1, high-voltage capacitance C3, supplements Between low-voltage capacitance C4, the first port of secondary capacitance partial pressure box is in supplementary low-voltage capacitance C4 and ground voltage Between, capacitor high voltage resistance R1 is 20M Ω, high-voltage capacitance C3 is 2pF, supplement the value of low-voltage capacitance C4 Adjustable.Wherein, supplement low-voltage capacitance C4 difference oscillograph entrance capacitance slightly to distinguish, at secondary resistive-capacitive voltage divider Box adjusts in manufacturing and supplements low-voltage capacitance C4 value, makes resistive-capacitive voltage divider ratio consistent.
Wherein, oscillograph includes oscillograph access resistance R0, oscillograph entrance capacitance C0, oscillograph entrance electricity Resistance is in parallel between R0, oscillograph entrance capacitance C0, and oscillograph access resistance R0 is 1M Ω, oscillograph entrance Electric capacity C0 is 13pF.
Embodiment two
GIS isolator operation can produce frequency and be up to the edge fast transient mistake less than 5ns when 70MHz, rising Voltage (VFTO), its actual measurement maximum is up to 2.27 times of reference values (881kV).So traditional VFTO visits The when that external oscillograph measuring, it is necessary to carry out blood pressure lowering with secondary lumped capacity structure, otherwise can Damage measurement equipment.But, when carry out office put on-line measurement when, due to office, to put the signal of generation relative More weak, so can not be with buck configuration when of now detection.
Therefore, the office measuring sensor based on capacitance partial pressure method VFTO provided in this utility model embodiment one On the basis of charging integrated probe, what this utility model embodiment two provided measures based on capacitance partial pressure method VFTO The charging integrated probe of office of sensor also include switching switch, office put measuring circuit, VFTO measuring circuit, two Secondary lumped capacity, host computer acquisition system, secondary lumped capacity is arranged in VFTO measuring circuit;Switching is opened Close and put measuring circuit or VFTO measuring circuit for alternatively connection office;Host computer acquisition system is for cutting Change switch transmitting control commands so that switching switch is put to enter between measuring circuit or VFTO measuring circuit in office Row selects a property switching.
Wherein, with protected location in secondary lumped capacity voltage reduction module, the accident that instantaneous peak value is bigger is run into Situation, can protect external measurement equipment not damaged by high pressure spine signal.
Wherein, host computer acquisition system switchs transmitting control commands by remote data transmission to switching.
Wherein, the communication mode between host computer acquisition system and switching switch is radio communication or cable modem Letter.
Wherein, radio communication is selected from Bluetooth technology, Wi-Fi, 4G, the one in 3G, GPRS, zigbee.
Wherein, wire communication is selected from RS-232, RS-485, USB, I2C, TWI, SPI, 1WIRE, ether One in network interface.
In the present embodiment, communication mode is that the standard transmission distance of RS-485, RS485 can pass 1200 meters, adopts Can break through this value with the RS485 private cable of the low decay of impedance matching, representative value reaches 1900 meters.So It is entirely capable of meeting the requirement of site operation wiring.
Although having been described for preferred embodiment of the present utility model, but those skilled in the art once learning Basic creative concept, then can make other change and amendment to these embodiments.So, appended power Profit requires to be intended to be construed to include preferred embodiment and fall into all changes of this utility model scope and repair Change.
Obviously, those skilled in the art this utility model can be carried out various change and modification without deviating from Spirit and scope of the present utility model.So, if these amendments of the present utility model and modification belong to this reality Within the scope of novel claim and equivalent technologies thereof, then this utility model is also intended to comprise these changes With including modification.

Claims (10)

1. the charging integrated probe of office measuring sensor based on capacitance partial pressure method VFTO, it is characterised in that Including alternating-current voltage source V1, probe to GIS guide rod electric capacity C1, probe direct-to-ground capacitance C0, a capacitance partial pressure Box, cable T1, secondary capacitance partial pressure box, oscillograph,
A described capacitance partial pressure box is in parallel with described probe direct-to-ground capacitance C0 by the first port and the second port After again with described voltage source V1, probe GIS guide rod electric capacity C1 is connected, a described capacitance partial pressure box passes through 3rd port is connected to one end of described cable T1;
Described secondary capacitance partial pressure box is in parallel with described oscillograph by the first port and the second port, and described two Secondary capacitance partial pressure box is connected to the other end of described cable T1 by the 3rd port.
Office based on capacitance partial pressure method VFTO measurement sensor the most according to claim 1 is charging integrated Probe, it is characterised in that described probe is 1pF to GIS guide rod electric capacity C1, described probe direct-to-ground capacitance C0 For 1nF.
Office based on capacitance partial pressure method VFTO measurement sensor the most according to claim 1 is charging integrated Probe, it is characterised in that be provided with electric capacity C2, coupling in a capacitance partial pressure box box in a capacitance partial pressure box Resistance Rm,
First port of a described capacitance partial pressure box is in electric capacity C2 and institute in a described capacitance partial pressure box box State between build-out resistor Rm,
Second port of a described capacitance partial pressure box is in electric capacity C2 and in a described capacitance partial pressure box box Between one ground voltage D1,
In a described capacitance partial pressure box box, electric capacity C2 is 1200pF, and described build-out resistor Rm is 50 Ω.
The charging integrated spy of office measuring sensor based on capacitance partial pressure method VFTO the most according to claim 1 Head, it is characterised in that include in described secondary capacitance partial pressure box capacitor high voltage resistance R1, high-voltage capacitance C3, Supplement low-voltage capacitance C4,
After described capacitor high voltage resistance R1 is in parallel with described high-voltage capacitance C3 again with the second ground voltage D2, supplement low Voltage capacitance C4 is connected,
First port of described secondary capacitance partial pressure box is in described high-tension resistive R1, high-voltage capacitance C3, supplements Between low-voltage capacitance C4,
First port of described secondary capacitance partial pressure box be in described supplementary low-voltage capacitance C4 and described ground voltage it Between,
Described capacitor high voltage resistance R1 is 20M Ω, high-voltage capacitance C3 is 2pF, supplement the value of low-voltage capacitance C4 Adjustable.
Office based on capacitance partial pressure method VFTO measurement sensor the most according to claim 1 is charging integrated Probe, it is characterised in that described oscillograph includes oscillograph access resistance R0, oscillograph entrance capacitance C0,
Parallel connection between described oscillograph access resistance R0, oscillograph entrance capacitance C0,
Described oscillograph access resistance R0 is 1M Ω, and described oscillograph entrance capacitance C0 is 13pF.
Office based on capacitance partial pressure method VFTO measurement sensor the most according to claim 1 is charging integrated Probe, it is characterised in that also include that measuring circuit, VFTO measuring circuit, secondary collection are put in switching switch, office Total capacitance, host computer acquisition system,
Described secondary lumped capacity is arranged in described VFTO measuring circuit;
Described switching switch puts measuring circuit or described VFTO measuring circuit for alternatively connecting described office;
Described host computer acquisition system is for described switching switch transmitting control commands so that described switching is opened Close to put in described office and carry out between measuring circuit or described VFTO measuring circuit selecting a property switching.
Office based on capacitance partial pressure method VFTO measurement sensor the most according to claim 6 is charging integrated Probe, it is characterised in that described host computer acquisition system is sent out to described switching switch by remote data transmission Send control command.
Office based on capacitance partial pressure method VFTO measurement sensor the most according to claim 7 is charging integrated Probe, it is characterised in that the communication mode between described host computer acquisition system and described switching switch is nothing Line communication or wire communication.
Office based on capacitance partial pressure method VFTO measurement sensor the most according to claim 8 is charging integrated Probe, it is characterised in that described radio communication is selected from Bluetooth technology, Wi-Fi, 4G, 3G, GPRS, zigbee In one.
Office based on capacitance partial pressure method VFTO measurement sensor the most according to claim 8 is charging integrated Probe, it is characterised in that described radio communication selected from RS-232, RS-485, USB, I2C, TWI, SPI, One in 1WIRE, Ethernet interface.
CN201620312199.6U 2016-04-14 2016-04-14 Integration probe is put in office based on electric capacity divides platen press VFTO measuring transducer Active CN205539343U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105891689A (en) * 2016-04-14 2016-08-24 国家电网公司 Partial discharge integrated probe based on capacitance voltage division method VFTO measurement sensor
CN107942115A (en) * 2017-10-22 2018-04-20 国网山西省电力公司电力科学研究院 The capacitance partial pressure type high voltage meter of adjustable intrinsic standoff ratio
CN109061411A (en) * 2018-07-11 2018-12-21 云南电网有限责任公司电力科学研究院 A kind of GIS measuring very fast transient overvoltage (VFTO) device management method and system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105891689A (en) * 2016-04-14 2016-08-24 国家电网公司 Partial discharge integrated probe based on capacitance voltage division method VFTO measurement sensor
CN107942115A (en) * 2017-10-22 2018-04-20 国网山西省电力公司电力科学研究院 The capacitance partial pressure type high voltage meter of adjustable intrinsic standoff ratio
CN107942115B (en) * 2017-10-22 2019-12-13 国网山西省电力公司电力科学研究院 Capacitance voltage-dividing type high-voltage measuring device capable of adjusting voltage-dividing ratio
CN109061411A (en) * 2018-07-11 2018-12-21 云南电网有限责任公司电力科学研究院 A kind of GIS measuring very fast transient overvoltage (VFTO) device management method and system

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