CN107525958A - A kind of transient state device and method that induced voltage measures over the ground being used for power equipment - Google Patents

A kind of transient state device and method that induced voltage measures over the ground being used for power equipment Download PDF

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Publication number
CN107525958A
CN107525958A CN201710543625.6A CN201710543625A CN107525958A CN 107525958 A CN107525958 A CN 107525958A CN 201710543625 A CN201710543625 A CN 201710543625A CN 107525958 A CN107525958 A CN 107525958A
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China
Prior art keywords
ground
metal electrode
transient state
dielectric
msub
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Pending
Application number
CN201710543625.6A
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Chinese (zh)
Inventor
周玮
张军
雷民
王斯琪
卢冰
汪泉
付济良
陈习文
王旭
郭子娟
齐聪
匡义
朱赤丹
余雪芹
刘方明
聂高宁
朱琦
程琳
冯振新
江翼
向冬冬
丁国成
陈庆涛
杨海涛
吴兴旺
尹睿涵
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.)
State Grid Corp of China SGCC
Wuhan NARI Ltd
China Electric Power Research Institute Co Ltd CEPRI
Electric Power Research Institute of State Grid Anhui Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Wuhan NARI Ltd
China Electric Power Research Institute Co Ltd CEPRI
Electric Power Research Institute of State Grid Anhui Electric Power Co Ltd
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Publication date
Application filed by State Grid Corp of China SGCC, Wuhan NARI Ltd, China Electric Power Research Institute Co Ltd CEPRI, Electric Power Research Institute of State Grid Anhui Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201710543625.6A priority Critical patent/CN107525958A/en
Publication of CN107525958A publication Critical patent/CN107525958A/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
    • G01R19/0084Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1227Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials

Abstract

The present invention discloses a kind of transient state device that induced voltage measures over the ground being used for power equipment, including:Metal electrode, it is connected with the metal shell of electrical equipment by dielectric, in the metal outer wall of dielectric fitting and electric equipment, the metal electrode is used to form equivalent capacity by dielectric with the metal shell of electrical equipment;High-frequency element, it is connected with the metal electrode, for suppressing high frequency electromagnetic wave signal refraction reflection, the voltage signal for avoiding collecting is disturbed by extra-high frequency electromagnetic waves;Electromagnetic coupled circuit, connects with equivalent capacity, for transient state caused by shelf depreciation on power equipment, induced voltage signal to couple over the ground.The beneficial effects of the present invention are:The device of the present invention is freestanding, and the interference of the superfrequency electromagnetic signal in space is reduced using quarantine measures, solves the problems, such as that transient state is easily disturbed when induced voltage detects over the ground by non-measured frequency band signals, improves the signal to noise ratio of key signal.

Description

It is a kind of be used for the transient state device that induced voltage measures over the ground of power equipment and Method
Technical field
It is used to set electric power the present invention relates to power equipment measurement of partial discharge field, and more particularly, to one kind The standby transient state device and method that induced voltage measures over the ground.
Background technology
When shelf depreciation occurs for switch cubicle or GIS, discharge electricity amount is first gathered in the ground metal portion adjacent with point of discharge, Form electromagnetic wave and propagated to all directions, electric wave detection essence in ground is electromagnetic wave caused by detection shelf depreciation.For extra-high Frequency electromagnetic waves, significantly decay when propagating to metal outer wall, preferable amplitude can not be detected in metal surface, for high frequency Rate electromagnetic wave (being usually 1MHz~30MHz), wave head can produce a transient state voltage-to-ground when traveling to metal surface, use electric capacity Type probe can collect transient state induced voltage signal over the ground, and ground electric wave detection method is exactly so as to judging by studying the signal The presence or absence of switch cubicle or GIS partial discharge.
Induced voltage detection is the detection method being currently widely used to transient state over the ground, to each caused by inside electric appliance Class Partial Discharge Detection has certain effectiveness, and the Partial Discharge Sources of switch cubicle can be measured, and this method turns into electricity One of common inspection means in the work of gas equipment state overhauling, its shortcoming are easily by radio signal and low-frequency electromagnetic wave etc. Interference.
The content of the invention
It is used for the invention provides a kind of to the transient state device and method that induced voltage measures over the ground of power equipment, With solve to transient state over the ground induced voltage detect when easily by all non-measured frequency ranges such as radio signal and low-frequency electromagnetic wave The problem of signal interference.
In order to solve the above problems, according to an aspect of the invention, there is provided a kind of transient state being used for power equipment The device that induced voltage measures over the ground, described device include:Metal electrode, dielectric, high-frequency element and electromagnetic coupled Circuit,
The metal electrode, it is connected with the metal shell of electrical equipment by dielectric, dielectric fitting and electricity In the metal outer wall of device equipment, the metal electrode is used to form equivalent electric by dielectric with the metal shell of electrical equipment Hold;
The high-frequency element, it is connected with the metal electrode, for suppressing high frequency electromagnetic wave signal refraction reflection, avoids The voltage signal collected is disturbed by extra-high frequency electromagnetic waves;
The electromagnetic coupled circuit, connects with equivalent capacity, for transient state pair caused by shelf depreciation on power equipment Ground induced voltage signal is coupled.
Preferably, wherein described device also includes:
Measuring unit, it is electric over the ground according to the voltage divider principle acquisition transient state by equivalent capacity and electromagnetic coupled circuit capacitance Press signal.
Preferably, wherein the high-frequency element includes:High frequency cable and SMA type high frequency seats, the cored wire of the high frequency cable It is connected with metal electrode.
Preferably, wherein the metal electrode is the scale copper of polygon, the dielectric is soft silica gel piece.
Preferably, wherein the scale copper thickness is 20 microns;The thickness of the soft silica gel piece is 0.4mm.
Preferably, wherein the value of the equivalent capacity calculates in the following manner:
Wherein, C1For the value of equivalent capacity, ε is the dielectric constant of dielectric, εrIt is normal for the relative dielectric of metal electrode Number, ε0For the dielectric constant of vacuum.
According to another aspect of the present invention, there is provided a kind of transient state induced voltage progress over the ground being used for power equipment The method of measurement, methods described include:
The metal shell of metal electrode and electrical equipment forms equivalent capacity by dielectric;
Suppress high frequency electromagnetic wave signal refraction reflection using high-frequency element, the voltage signal for avoiding collecting is by superfrequency The interference of electromagnetic wave;
Using electromagnetic coupled circuit, to transient state caused by shelf depreciation on power equipment, induced voltage signal carries out coupling over the ground Close.
Preferably, wherein methods described also includes:
The transient state voltage-to-ground signal is obtained according to voltage divider principle by equivalent capacity and electromagnetic coupled circuit capacitance.
Preferably, wherein the high-frequency element includes:High frequency cable and SMA type high frequency seats.
Preferably, wherein the metal electrode is the scale copper of polygon, the dielectric is soft silica gel piece.
Preferably, wherein the scale copper thickness is 20 microns;The thickness of the soft silica gel piece is 0.4mm,
Preferably, wherein the value of the equivalent capacity calculates in the following manner:
Wherein, C1For the value of equivalent capacity, ε is the dielectric constant of dielectric, εrIt is normal for the relative dielectric of metal electrode Number, ε0For the dielectric constant of vacuum.
The beneficial effects of the present invention are:
1. the device of the present invention is freestanding, it is not in power equipment to be measured in same structure, high pressure can be reduced Danger Electric shock risk.
2. the device of the present invention uses the superfrequency electromagnetism in quarantine measures reduction space by filtering out power frequency interference signals The interference of signal, solve transient state over the ground induced voltage detect when easily by radio signal and low-frequency electromagnetic wave etc., all are non- The problem of measuring frequency band signals interference, improve the signal to noise ratio of key signal.
Brief description of the drawings
By reference to the following drawings, the illustrative embodiments of the present invention can be more fully understood by:
Fig. 1 is the transient state dress that induced voltage measures over the ground being used for power equipment according to embodiment of the present invention Put 100 structural representation;
Fig. 2 is to be used for according to embodiment of the present invention to the transient state of power equipment showing of measuring of induced voltage over the ground It is intended to;
Fig. 3 be according to embodiment of the present invention be used for the transient state of power equipment over the ground induced voltage measure etc. Imitate circuit diagram;
Fig. 4 is the transient state dress that induced voltage measures over the ground being used for power equipment according to embodiment of the present invention The schematic diagram put.And
Fig. 5 is the transient state side that induced voltage measures over the ground being used for power equipment according to embodiment of the present invention The flow chart of method 500.
Embodiment
The illustrative embodiments of the present invention are introduced with reference now to accompanying drawing, however, the present invention can use many different shapes Formula is implemented, and is not limited to embodiment described herein, there is provided these embodiments are to disclose at large and fully The present invention, and fully pass on the scope of the present invention to person of ordinary skill in the field.Show for what is be illustrated in the accompanying drawings Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements are attached using identical Icon is remembered.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has to person of ordinary skill in the field It is common to understand implication.Further it will be understood that the term limited with usually used dictionary, be appreciated that and its The linguistic context of association area has consistent implication, and is not construed as Utopian or overly formal meaning.
Fig. 1 is the transient state dress that induced voltage measures over the ground being used for power equipment according to embodiment of the present invention Put 100 structural representation.As shown in figure 1, the transient state dress that induced voltage measures over the ground being used for power equipment Put 100 and be used for that induced voltage to measure over the ground to the transient state of power equipment, described device 100 possesses absolute construction, anti-interference The characteristics of ability is by force and measurement is convenient.Described device 100 includes:Metal electrode 101, dielectric 102, the and of high-frequency element 103 Electromagnetic coupled circuit 104.Preferably, the metal electrode 101 is connected with the metal shell of electrical equipment by dielectric 102 Connect, in the metal outer wall of dielectric fitting and electric equipment, the metal electrode is used to lead to the metal shell of electrical equipment Cross dielectric and form equivalent capacity.Preferably, wherein the metal electrode is the scale copper of polygon, the dielectric is Soft silica gel piece.Preferably, wherein the scale copper thickness is 20 microns;The thickness of the soft silica gel piece is 0.4mm.Preferably, The value of wherein described equivalent capacity calculates in the following manner:
Wherein, C1For the value of equivalent capacity, ε is the dielectric constant of dielectric, εrIt is normal for the relative dielectric of metal electrode Number, ε 0 are the dielectric constant of vacuum.To realize convenient equivalent capacity C1, the scale copper thickness is about 20 microns;Thin copper Piece front end is supported using soft silica gel piece as electric capacity, and thickness is no more than 0.5 millimeter, and its thickness directly determines scale copper with being tested The distance of switch cubicle metal outer wall, its thickness should be reduced as far as possible on the premise of good insulation is ensured.Electrical equipment metal outer wall The value of the equivalent capacity formed between metal electrode is relevant with the size of metal electrode and material, it is preferred that using polygon Or it is similar to the good fine copper or beallon of electrical conductivity of polygon.
Preferably, the high-frequency element 103 is connected with the metal electrode, for suppressing high frequency electromagnetic wave signal refraction Reflection, the voltage signal for avoiding collecting are disturbed by extra-high frequency electromagnetic waves.Preferably, wherein the high-frequency element includes: High frequency cable and SMA type high frequency seats, the cored wire of the high frequency cable are connected with metal electrode.
Preferably, the electromagnetic coupled circuit 104, connects with equivalent capacity, for being produced to shelf depreciation on power equipment Induced voltage signal is coupled raw transient state over the ground.
Preferably, wherein described device also includes:
Measuring unit, it is electric over the ground according to the voltage divider principle acquisition transient state by equivalent capacity and electromagnetic coupled circuit capacitance Press signal.
Fig. 2 is to be used for according to embodiment of the present invention to the transient state of power equipment showing of measuring of induced voltage over the ground It is intended to.As shown in Fig. 2 whole device fitting is with the shell wall of power equipment to be measured, forming equivalent circuit C1 and electromagnetic coupled Circuit capacitance C2, the transient signal that electromagnetic wave senses on equipment outer wall is according to voltage divider principle from electric capacity C1 and the coupling of series connection with it Electric capacity C2 both ends are closed to obtain.
Fig. 3 be according to embodiment of the present invention be used for the transient state of power equipment over the ground induced voltage measure etc. Imitate circuit diagram.As shown in figure 3, measurement module by equivalent capacity C1 and electromagnetic coupled circuit capacitance C2 according to voltage divider principle, from Equivalent capacity C1 both ends obtain the transient state voltage-to-ground letter office.
Fig. 4 is the transient state dress that induced voltage measures over the ground being used for power equipment according to embodiment of the present invention The schematic diagram put.As illustrated, described device includes:Soft silica gel piece 1, scale copper metal electrode 2, high frequency cable 3, insulation crust 4, electromagnetic coupled circuit 5, SMA type high frequencies seat 6.The insulation crust and remaining part pass through the closing structure with shield effectiveness Composition measuring apparatus;The electromagnetic coupled circuit has signal coupling to the transient voltage of electromagnetic wave induction on GIS or switch cabinet Conjunction ability, the design of the electromagnetic coupled circuit should reduce the resonance of electric capacity and inductance in high frequency;The soft silica gel piece fitting In in the metal outer wall of tested electrical equipment, and equivalent capacity is formed with metal outer wall;The SMA types high frequency seat, high frequency cable The signal after collection is avoided by electromagnetic interference;The transient state that whole parts described above are formed induced voltage sensing element over the ground With larger frequency band range.
According to the general principle of transient state induced electricity platen press over the ground, a metal electrode is laid simultaneously in electrical equipment metal outer wall And using soft silica gel piece as dielectric, equivalent electric is formed by soft kiss-coating piece between metal electrode and electrical equipment outer wall shell Hold, then Partial discharge signal can be from the both ends of equivalent capacity according to principle of capacitive divider by electric capacity and the coupled capacitor with connecting Obtain Partial discharge signal.Equivalent capacity C1 computational methods are:
Wherein, ε is the dielectric constant of medium, and ε r are the relative dielectric constant of metal electrode, and ε 0 is the dielectric constant of vacuum. To realize convenient equivalent capacity C1, the scale copper thickness is about 20 microns;Scale copper front end uses soft silica gel piece conduct Electric capacity supports, and thickness is no more than 0.5 millimeter, and its thickness directly determines the distance of scale copper and tested switch cubicle metal outer wall, Its thickness should be reduced on the premise of good insulation is ensured as far as possible.
The value of the equivalent capacity formed between electrical equipment metal outer wall and scale copper metal electrode and the material of metal electrode Matter is relevant with size, it is preferred that using polygon or is similar to the good fine copper or beallon of electrical conductivity of polygon.
Insulation crust has exterior insulation ability, avoids the interference signals such as static electricity on human body during operation from producing measurement result Influence, it is preferred that the less good conductors of resistance such as copper, aluminium can be used in insulation crust internal shield external electromagnetic waves.SMA The component feature impedances such as type high frequency seat, high frequency cable are 50 Ω, and its cored wire is connected with scale copper, and it is anti-to suppress high-frequency signal refraction Penetrate, avoid the signal after collection to be disturbed by ultrahigh frequency electromagnetic wave signal as far as possible, when interference electromagnetic wave (generally superfrequency Electromagnetic wave) it can be absorbed or reflected when passing to the metal surface of high-frequency element, so as to electromagnetic wave energy of decaying.By using every From the interference that radio signal and low frequency electromagnetic signals are reduced with shielding measure, the signal to noise ratio of key signal is effectively increased.
Electromagnetic coupled circuit is to the transient state of electromagnetic wave induction, there is induced voltage signal to obtain over the ground on GIS or switch cabinet Take ability.When shelf depreciation occurs for the electrical equipment such as GIS or switch cubicle, transient signal that electromagnetic wave senses on equipment outer wall It can be obtained according to voltage divider principle from the coupled capacitor C2 both ends of electric capacity C1 and series connection with it.Electromagnetic coupled circuit reduces in high frequency The resonance of electric capacity and lead inductance, induced voltage sensing element has larger frequency band to the transient state that all of the above part is formed over the ground Scope.
Fig. 5 is the transient state side that induced voltage measures over the ground being used for power equipment according to embodiment of the present invention The flow chart of method 500.As shown in figure 5, the transient state method 500 that induced voltage measures over the ground being used for power equipment For for the transient state to power equipment, induced voltage to measure over the ground, methods described 500 is since step 501 place, in step The metal shell of rapid 501 metal electrode and electrical equipment forms equivalent capacity by dielectric.Preferably, wherein the metal Electrode is the scale copper of polygon, and the dielectric is soft silica gel piece.Preferably, wherein the value of the equivalent capacity by with Under type calculates:
Wherein, C1For the value of equivalent capacity, ε is the dielectric constant of dielectric, εrIt is normal for the relative dielectric of metal electrode Number, ε0For the dielectric constant of vacuum.
Preferably, wherein the scale copper thickness is 20 microns;The thickness of the soft silica gel piece is preferably 0.4mm,
Preferably, suppress high frequency electromagnetic wave signal refraction reflection using high-frequency element in step 502, avoid the electricity collected Pressure signal is disturbed by extra-high frequency electromagnetic waves.Preferably, wherein the high-frequency element includes:High frequency cable and SMA type high frequencies Seat.
Preferably, transient state caused by shelf depreciation on power equipment is felt over the ground using electromagnetic coupled circuit in step 503 Voltage signal is answered to be coupled.
Preferably, wherein methods described also includes:
The transient state voltage-to-ground signal is obtained according to voltage divider principle by equivalent capacity and electromagnetic coupled circuit capacitance.
Embodiments of the invention are used for the transient state device 100 that induced voltage measures over the ground of power equipment and this Being used for for another embodiment of invention is corresponding to the transient state method 500 that induced voltage measures over the ground of power equipment, It will not be repeated here.
The present invention is described by reference to a small amount of embodiment.However, it is known in those skilled in the art, as What subsidiary Patent right requirement was limited, except the present invention other embodiments disclosed above equally fall the present invention's In the range of.
Normally, all terms used in the claims are all solved according to them in the usual implication of technical field Release, unless clearly being defined in addition wherein.All references " one/described/be somebody's turn to do [device, component etc.] " are all opened ground At least one example being construed in described device, component etc., unless otherwise expressly specified.Any method disclosed herein Step need not all be run with disclosed accurately order, unless explicitly stated otherwise.

Claims (12)

  1. A kind of 1. transient state device that induced voltage measures over the ground being used for power equipment, it is characterised in that described device Including:Metal electrode, dielectric, high-frequency element and electromagnetic coupled circuit,
    The metal electrode, it is connected with the metal shell of electrical equipment by dielectric, dielectric fitting is set with electrical equipment In standby metal outer wall, the metal electrode is used to form equivalent capacity by dielectric with the metal shell of electrical equipment;
    The high-frequency element, it is connected with the metal electrode, for suppressing high frequency electromagnetic wave signal refraction reflection, avoids gathering To voltage signal disturbed by extra-high frequency electromagnetic waves;
    The electromagnetic coupled circuit, connects with equivalent capacity, for feeling over the ground to transient state caused by shelf depreciation on power equipment Voltage signal is answered to be coupled.
  2. 2. device according to claim 1, it is characterised in that described device also includes:
    Measuring unit, the transient state voltage-to-ground is obtained according to voltage divider principle by equivalent capacity and electromagnetic coupled circuit capacitance and believed Number.
  3. 3. device according to claim 1, it is characterised in that the high-frequency element includes:High frequency cable and SMA type high frequencies Seat, the cored wire of the high frequency cable are connected with metal electrode.
  4. 4. device according to claim 1, it is characterised in that the metal electrode is the scale copper of polygon, described exhausted Edge medium is soft silica gel piece.
  5. 5. device according to claim 4, it is characterised in that the scale copper thickness is 20 microns;The soft silica gel piece Thickness be 0.4mm.
  6. 6. device according to claim 1, it is characterised in that the value of the equivalent capacity calculates in the following manner:
    <mrow> <msub> <mi>C</mi> <mn>1</mn> </msub> <mo>=</mo> <mfrac> <mrow> <mi>&amp;epsiv;</mi> <mi>s</mi> </mrow> <mi>d</mi> </mfrac> <mo>=</mo> <mfrac> <mrow> <msub> <mi>&amp;epsiv;</mi> <mi>r</mi> </msub> <msub> <mi>&amp;epsiv;</mi> <mn>0</mn> </msub> <mi>s</mi> </mrow> <mi>d</mi> </mfrac> <mo>,</mo> </mrow>
    Wherein, C1For the value of equivalent capacity, ε is the dielectric constant of dielectric, εrFor the relative dielectric constant of metal electrode, ε0 For the dielectric constant of vacuum.
  7. A kind of 7. transient state method that induced voltage measures over the ground being used for power equipment, it is characterised in that methods described Including:
    The metal shell of metal electrode and electrical equipment forms equivalent capacity by dielectric;
    Suppress high frequency electromagnetic wave signal refraction reflection using high-frequency element, the voltage signal for avoiding collecting is by superfrequency electromagnetism The interference of ripple;
    Using electromagnetic coupled circuit, to transient state caused by shelf depreciation on power equipment, induced voltage signal couples over the ground.
  8. 8. according to the method for claim 7, it is characterised in that methods described also includes:
    The transient state voltage-to-ground signal is obtained according to voltage divider principle by equivalent capacity and electromagnetic coupled circuit capacitance.
  9. 9. according to the method for claim 7, it is characterised in that the high-frequency element includes:High frequency cable and SMA type high frequencies Seat.
  10. 10. according to the method for claim 7, it is characterised in that the metal electrode is the scale copper of polygon, described exhausted Edge medium is soft silica gel piece.
  11. 11. according to the method for claim 10, it is characterised in that the scale copper thickness is 20 microns;The soft silica gel The thickness of piece is 0.4mm.
  12. 12. according to the method for claim 7, it is characterised in that the value of the equivalent capacity calculates in the following manner:
    <mrow> <msub> <mi>C</mi> <mn>1</mn> </msub> <mo>=</mo> <mfrac> <mrow> <mi>&amp;epsiv;</mi> <mi>s</mi> </mrow> <mi>d</mi> </mfrac> <mo>=</mo> <mfrac> <mrow> <msub> <mi>&amp;epsiv;</mi> <mi>r</mi> </msub> <msub> <mi>&amp;epsiv;</mi> <mn>0</mn> </msub> <mi>s</mi> </mrow> <mi>d</mi> </mfrac> <mo>,</mo> </mrow>
    Wherein, C1For the value of equivalent capacity, ε is the dielectric constant of dielectric, εrFor the relative dielectric constant of metal electrode, ε0 For the dielectric constant of vacuum.
CN201710543625.6A 2017-07-05 2017-07-05 A kind of transient state device and method that induced voltage measures over the ground being used for power equipment Pending CN107525958A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110865284A (en) * 2019-11-12 2020-03-06 云南电网有限责任公司临沧供电局 Magnetic attraction type capacitance probe based on polyvinylidene fluoride film

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102508128A (en) * 2011-10-24 2012-06-20 天津大学 Switch cabinet local discharge transient-to-ground voltage detection system based on wireless network
CN202383240U (en) * 2011-12-23 2012-08-15 保定天威集团有限公司 Combined type TEV (Transient Earth Voltage) sensor
KR20130047418A (en) * 2011-10-31 2013-05-08 한국전력공사 Apparatus and method for diagnosing partial discharge of high voltage facilities using a plurality of sensors
CN203054160U (en) * 2012-10-31 2013-07-10 国网电力科学研究院武汉南瑞有限责任公司 TEV sensor used in partial discharge detection of switch cabinet
CN103207306A (en) * 2013-03-11 2013-07-17 广东电网公司电力科学研究院 Partial discharge transient earth voltage sensor
CN106645876A (en) * 2016-12-29 2017-05-10 国家电网公司 Measurement system and measurement method for high-frequency transit voltage in GIS

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102508128A (en) * 2011-10-24 2012-06-20 天津大学 Switch cabinet local discharge transient-to-ground voltage detection system based on wireless network
KR20130047418A (en) * 2011-10-31 2013-05-08 한국전력공사 Apparatus and method for diagnosing partial discharge of high voltage facilities using a plurality of sensors
CN202383240U (en) * 2011-12-23 2012-08-15 保定天威集团有限公司 Combined type TEV (Transient Earth Voltage) sensor
CN203054160U (en) * 2012-10-31 2013-07-10 国网电力科学研究院武汉南瑞有限责任公司 TEV sensor used in partial discharge detection of switch cabinet
CN103207306A (en) * 2013-03-11 2013-07-17 广东电网公司电力科学研究院 Partial discharge transient earth voltage sensor
CN106645876A (en) * 2016-12-29 2017-05-10 国家电网公司 Measurement system and measurement method for high-frequency transit voltage in GIS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110865284A (en) * 2019-11-12 2020-03-06 云南电网有限责任公司临沧供电局 Magnetic attraction type capacitance probe based on polyvinylidene fluoride film

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