CN103207308A - Lightning arrester resistive current and capacitive current transient value measuring method - Google Patents

Lightning arrester resistive current and capacitive current transient value measuring method Download PDF

Info

Publication number
CN103207308A
CN103207308A CN201310079901XA CN201310079901A CN103207308A CN 103207308 A CN103207308 A CN 103207308A CN 201310079901X A CN201310079901X A CN 201310079901XA CN 201310079901 A CN201310079901 A CN 201310079901A CN 103207308 A CN103207308 A CN 103207308A
Authority
CN
China
Prior art keywords
phase
current
sampling instant
arrester
lightning arrester
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201310079901XA
Other languages
Chinese (zh)
Other versions
CN103207308B (en
Inventor
林富洪
陈文景
徐致远
李振华
徐志忠
李慧斌
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
State Grid Fujian Electric Power Co Ltd
Putian Power Supply Co of State Grid Fujian Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
State Grid Fujian Electric Power Co Ltd
Putian Power Supply Co of State Grid Fujian Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, State Grid Fujian Electric Power Co Ltd, Putian Power Supply Co of State Grid Fujian Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201310079901.XA priority Critical patent/CN103207308B/en
Publication of CN103207308A publication Critical patent/CN103207308A/en
Priority to PCT/CN2014/073108 priority patent/WO2014139381A1/en
Application granted granted Critical
Publication of CN103207308B publication Critical patent/CN103207308B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing 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
    • G01R31/1227—Testing 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
    • G01R31/1236—Testing 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 of surge arresters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/06—Measuring real component; Measuring reactive component

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

The invention discloses a lightning arrester resistive current and capacitive current transient value measuring method which includes that leaked current sampling values of a three-phase lightning arrester grounding down lead at all sampling times and high voltage side voltage sampling values of an A-phase lightning arrester at all sampling times are collected; phase angle of fundamental frequency voltage of high voltage side voltage of the A-phase lightning arrester, amplitude valueof fundamental frequency voltage, phase angle of tertiary voltage harmonic wave and amplitude value of tertiary voltage harmonic wave are calculated in a Fourier algorithm; influences of tertiary voltage harmonic wave and inter-phase coupling capacitance are considered, and transient values of capacitive current and resistive current in leaked current of the three-phase metallic oxide lightning arrester are obtained through calculation. According to the lightning arrester resistive current and capacitive current transient value measuring method, influences of tertiary voltage harmonic wave and inter-phase coupling capacitance are considered on a mathematical model, accurate measurement of the transient process of resistive current and capacitive current in leaked current of the three-phase lightning arrester is achieved, insulating property monitoring time points of the three-phase lightning arrester are shortened to all the sampling times, and reliable basis is provided for finding lightning arrester insulating property dynamic change conditions and fast making lightning arrester overhaul schemes.

Description

The measuring method of arrester resistance current and capacity current transient state value
Technical field
The present invention relates to the electric equipment protection field, specifically relate to the measuring method of a kind of arrester resistance current and capacity current transient state value.
Background technology
Measuring method to the current in resistance property in the lightning arrester Leakage Current and capacity current mainly comprises first-harmonic method, third harmonic method, harmonic analysis method and condenser current compensation method at present, this several method monitoring accuracy is influenced by alternate coupling capacitance, harmonic analysis method is big owing to calculated amount, poor practicability; First-harmonic method, third harmonic method and condenser current compensation rule need utilize a cycle data window to calculate current in resistance property fundamental component and capacitance current fundamental component, a fundamental frequency data window can only calculate a current in resistance property and capacity current numerical value, can't accomplish the transient state whole process analysis monitoring to the current in resistance property in the lightning arrester Leakage Current and capacity current, real-time is not strong.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, provide a kind of calculated amount less, practical, can realize arrester resistance current and capacity current transient state value measurement method that the current in resistance property in the leakage current of an arrester and capacity current are carried out the monitoring of transient state whole process analysis.
The objective of the invention is to realize by following approach:
Arrester resistance current and capacity current transient state value measurement method, its main points are, comprise the steps:
(1) provide a kind of measurement mechanism, its A that gathers the leakage current sampled value of A, B, C three-phase lightning protector down conductor of each sampling instant and each sampling instant is lightning arrester high side voltage sampled value mutually;
(2) charge value of obtaining according to it of measurement mechanism calculates the current in resistance property value iAr (t) in t sampling instant A phase leakage current of an arrester:
Figure BDA00002914577700011
Figure BDA00002914577700012
Figure BDA00002914577700013
Measurement mechanism calculates the capacity current value i in the t sampling instant A phase leakage current of an arrester Ac(t):
Figure BDA00002914577700021
Figure BDA00002914577700022
(3) measurement mechanism calculates the current in resistance property value i in the t sampling instant B phase leakage current of an arrester Br(t):
Figure BDA00002914577700024
Figure BDA00002914577700025
Measurement mechanism calculates the capacity current value i in the t sampling instant B phase leakage current of an arrester Bc(t):
Figure BDA00002914577700026
Figure BDA00002914577700027
(4) measurement mechanism calculates the current in resistance property value i in the t sampling instant C phase leakage current of an arrester Cr(t):
Figure BDA00002914577700028
Figure BDA000029145777000210
Measurement mechanism calculates the capacity current value i in the t sampling instant C phase leakage current of an arrester Cc(t):
Figure BDA000029145777000211
Figure BDA000029145777000213
Wherein, i A(t), i B(t), i C(t) be respectively the flow through leakage current sampled value of A, B, C phase arrester ground downlead of t sampling instant; i 0(t 1)=i A(t 1)+i B(t 1)+i C(t 1); i A(t 1) be t 1The flow through leakage current sampled value of A phase arrester ground downlead of sampling instant; i A(t 2) be t 2The flow through leakage current sampled value of A phase arrester ground downlead of sampling instant; i B(t 1) be t 1The flow through leakage current sampled value of B phase arrester ground downlead of sampling instant; i C(t 1) be t 1The flow through leakage current sampled value of C phase arrester ground downlead of sampling instant;
t 1For the sampling instant of A phase lightning arrester high side voltage waveform pass zero point and satisfy u A(t 1-△ t)＜0 and u A(t 1+ △ t) 0; u A(t 1-△ t), u A(t 1+ △ t) is respectively t 1-△ t, t 1The A phase lightning arrester high side voltage sampled value of+△ t sampling instant; θ 1Phase angle for the fundamental frequency voltage of A phase lightning arrester high side voltage; θ 3Phase angle for the third harmonic voltage of A phase lightning arrester high side voltage; U 1mAmplitude for the fundamental frequency voltage of A phase lightning arrester high side voltage; U 3mAmplitude for the third harmonic voltage of A phase lightning arrester high side voltage; T is sampling instant; t 2It is the sampling instant of any zero crossing of A phase lightning arrester high side voltage in the primitive period; ω is the electric system angular frequency;
(5) measurement mechanism is stored the current in resistance property transient state value in its A that calculates, B, the C three-phase lightning protector Leakage Current and capacity current transient state value.
Technique scheme has following beneficial effect:
The inventive method has been considered the influence of tertiary voltage harmonic wave and alternate coupling capacitance from mathematical model, realized the accurate measurement to the current in resistance property in the three-phase lightning protector leakage current and capacity current transient state overall process, realized the monitoring time point of three-phase lightning protector insulating property is shortened to each sampling instant, for finding lightning arrester insulation performance dynamic change situation, providing reliable basis for formulating lightning arrester maintenance scheme fast.
Description of drawings
Fig. 1 is a kind of arrester resistance current of providing of the embodiment of the invention and the process flow diagram of capacity current transient state value measurement method.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing embodiment of the present invention is done detailed description further.
The embodiment of the invention is gathered t sampling instant flow through A, the B of A, B, C three-phase lightning protector down conductor, the leakage current i of C three-phase lightning protector at first in real time A(t), i B(t), i C(t), gather t sampling instant A phase lightning arrester high side voltage u in real time A(t); Wherein, t is any sampling instant.
Utilize Fourier algorithm to calculate the phase angle theta of the fundamental frequency voltage of A phase lightning arrester high side voltage 1Amplitude U with fundamental frequency voltage 1m, utilize Fourier algorithm to calculate the phase angle theta of the tertiary voltage harmonic wave of A phase lightning arrester high side voltage 3Amplitude U with the tertiary voltage harmonic wave 3m
Calculate the current in resistance property value i in the t sampling instant A phase leakage current of an arrester Ar(t):
Figure BDA00002914577700041
Figure BDA00002914577700042
Figure BDA00002914577700043
Calculate the capacity current value i in the t sampling instant A phase leakage current of an arrester Ac(t):
Figure BDA00002914577700044
Figure BDA00002914577700046
Calculate the current in resistance property value i in the t sampling instant B phase leakage current of an arrester Br(t):
Figure BDA00002914577700047
Figure BDA00002914577700048
Calculate the capacity current value i in the t sampling instant B phase leakage current of an arrester Bc(t):
Figure BDA00002914577700049
Figure BDA000029145777000410
Calculate the current in resistance property value i in the t sampling instant C phase leakage current of an arrester Cr(t):
Figure BDA000029145777000411
Figure BDA000029145777000412
Figure BDA000029145777000413
Calculate the capacity current value i in the t sampling instant C phase leakage current of an arrester Cc(t):
Figure BDA00002914577700051
Figure BDA00002914577700052
Figure BDA00002914577700053
Wherein, i A(t), i B(t), i C(t) be respectively the flow through leakage current sampled value of A, B, C phase arrester ground downlead of t sampling instant; i 0(t 1)=i A(t 1)+i B(t 1)+i C(t 1); i A(t 1) be t 1The flow through leakage current sampled value of A phase arrester ground downlead of sampling instant; i A(t 2) be t 2The flow through leakage current sampled value of A phase arrester ground downlead of sampling instant; i B(t 1) be t 1The flow through leakage current sampled value of B phase arrester ground downlead of sampling instant; i C(t 1) be t 1The flow through leakage current sampled value of C phase arrester ground downlead of sampling instant;
t 1For the sampling instant of A phase lightning arrester high side voltage waveform pass zero point and satisfy u A(t 1And u-△ t)＜0 A(t 1+ △ t)〉0; u A(t 1-△ t), u A(t 1+ △ t) is respectively t 1-△ t, t 1The A phase lightning arrester high side voltage sampled value of+△ t sampling instant; θ 1Phase angle for the fundamental frequency voltage of A phase lightning arrester high side voltage; θ 3Phase angle for the third harmonic voltage of A phase lightning arrester high side voltage; U 1mAmplitude for the fundamental frequency voltage of A phase lightning arrester high side voltage; U 3mAmplitude for the third harmonic voltage of A phase lightning arrester high side voltage; T is sampling instant; t 2It is the sampling instant of any zero crossing of A phase lightning arrester high side voltage in the primitive period; ω is the electric system angular frequency.
The inventive method has been considered the influence of tertiary voltage harmonic wave and alternate coupling capacitance in mathematical model, realized the accurate measurement to the current in resistance property in the three-phase lightning protector leakage current and capacity current transient state process, realized three-phase lightning protector insulating property monitoring time point is shortened to each sampling instant, for finding lightning arrester insulation performance dynamic change situation, providing reliable basis for formulating lightning arrester maintenance scheme fast.
The above only is preferred embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.

Claims (1)

1. the measuring method of arrester resistance current and capacity current transient state value is characterized in that, comprises the following steps:
(1) provide a kind of measurement mechanism, its A that gathers the leakage current sampled value of A, B, C three-phase lightning protector down conductor of each sampling instant and each sampling instant is lightning arrester high side voltage sampled value mutually;
(2) measurement mechanism is according to the current in resistance property value i in its charge value calculating t sampling instant A phase leakage current of an arrester that obtains Ar(t):
Figure FDA00002914577600011
Figure FDA00002914577600012
Figure FDA00002914577600013
Measurement mechanism calculates the capacity current value i in the t sampling instant A phase leakage current of an arrester Ac(t):
Figure FDA00002914577600015
Figure FDA00002914577600016
(3) measurement mechanism calculates the current in resistance property value i in the t sampling instant B phase leakage current of an arrester Br(t):
Figure FDA00002914577600017
Figure FDA00002914577600018
Measurement mechanism calculates the capacity current value i in the t sampling instant B phase leakage current of an arrester Bc(t):
Figure FDA00002914577600019
Figure FDA000029145776000110
(4) measurement mechanism calculates the current in resistance property value i in the t sampling instant C phase leakage current of an arrester Cr(t):
Figure FDA000029145776000111
Figure FDA000029145776000112
Measurement mechanism calculates the capacity current value i in the t sampling instant C phase leakage current of an arrester Cc(t):
Figure FDA00002914577600021
Figure FDA00002914577600022
Figure FDA00002914577600023
Wherein, i A(t), i B(t), i C(t) be respectively the flow through leakage current sampled value of A, B, C phase arrester ground downlead of t sampling instant; i 0(t 1)=i A(t 1)+i B(t 1)+i C(t 1); i A(t 1) be t 1The flow through leakage current sampled value of A phase arrester ground downlead of sampling instant; i A(t 2) be t 2The flow through leakage current sampled value of A phase arrester ground downlead of sampling instant; i B(t 1) be t 1The flow through leakage current sampled value of B phase arrester ground downlead of sampling instant; i C(t 1) be t 1The flow through leakage current sampled value of C phase arrester ground downlead of sampling instant;
t 1For the sampling instant of A phase lightning arrester high side voltage waveform pass zero point and satisfy u A(t 1And u-△ t)＜0 A(t 1+ △ t)〉0; u A(t 1-△ t), u A(t 1+ △ t) is respectively t 1-△ t, t 1The A phase lightning arrester high side voltage sampled value of+△ t sampling instant; θ 1Phase angle for the fundamental frequency voltage of A phase lightning arrester high side voltage; θ 3Phase angle for the third harmonic voltage of A phase lightning arrester high side voltage; U 1mAmplitude for the fundamental frequency voltage of A phase lightning arrester high side voltage; U 3mAmplitude for the third harmonic voltage of A phase lightning arrester high side voltage; T is sampling instant; t 2It is the sampling instant of any zero crossing of A phase lightning arrester high side voltage in the primitive period; ω is the electric system angular frequency;
(5) measurement mechanism is stored the current in resistance property transient state value in its A that calculates, B, the C three-phase lightning protector Leakage Current and capacity current transient state value.
CN201310079901.XA 2013-03-13 2013-03-13 The measuring method of arrester resistance current and capacity current transient value Active CN103207308B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201310079901.XA CN103207308B (en) 2013-03-13 2013-03-13 The measuring method of arrester resistance current and capacity current transient value
PCT/CN2014/073108 WO2014139381A1 (en) 2013-03-13 2014-03-10 Method for measuring transient values of resistive current and capacitive current of lightning arrester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310079901.XA CN103207308B (en) 2013-03-13 2013-03-13 The measuring method of arrester resistance current and capacity current transient value

Publications (2)

Publication Number Publication Date
CN103207308A true CN103207308A (en) 2013-07-17
CN103207308B CN103207308B (en) 2015-08-26

Family

ID=48754591

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310079901.XA Active CN103207308B (en) 2013-03-13 2013-03-13 The measuring method of arrester resistance current and capacity current transient value

Country Status (2)

Country Link
CN (1) CN103207308B (en)
WO (1) WO2014139381A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014139381A1 (en) * 2013-03-13 2014-09-18 国家电网公司 Method for measuring transient values of resistive current and capacitive current of lightning arrester
CN105277780A (en) * 2014-06-25 2016-01-27 国家电网公司 Voltage zero-crossing point obtaining method and device
CN105785171A (en) * 2016-03-07 2016-07-20 清华大学 Method for determining aging state of ZnO voltage-sensitive resistor disc according to higher harmonic characteristic of leakage current
US20170045567A1 (en) * 2015-08-10 2017-02-16 Xj Group Corporation Monitoring method and system of arrester applied to smart substation
CN112066516A (en) * 2020-08-03 2020-12-11 珠海格力电器股份有限公司 Air conditioner, fault self-diagnosis method, external unit positioning fault method and remote controller
CN115078938A (en) * 2022-08-22 2022-09-20 广东电网有限责任公司佛山供电局 Method and device for identifying insulating property of lightning arrester

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108919026B (en) * 2018-05-28 2023-10-24 国网浙江乐清市供电有限公司 Live detection method for leakage current of lightning arrester
CN112578311A (en) * 2020-12-01 2021-03-30 国网山东省电力公司电力科学研究院 Lightning arrester leakage current detection device and method
CN112649669B (en) * 2020-12-21 2022-03-04 保定腾远电力科技有限公司 Lightning arrester live-line detection method based on primary phase angle measurement
CN115575856B (en) * 2022-11-18 2023-03-07 国网四川省电力公司成都供电公司 Online monitoring method and system for leakage current of lightning arrester in power transmission cable terminal field

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11191477A (en) * 1997-12-26 1999-07-13 Mitsubishi Electric Corp Leakage current detection device for arrester
KR20050003804A (en) * 2003-07-04 2005-01-12 학교법인 인하학원 Method and Device for measuring resistive leakage current by time-delay synthesis method in deciding the deterioration diagnosis of arrester
WO2011021887A2 (en) * 2009-08-20 2011-02-24 한국전기연구원 Method for detecting resistive leakage current of nonlinear element arrester using differential method and apparatus therefor
CN102043084A (en) * 2010-12-06 2011-05-04 上海思盛信息科技事务所 Method for detecting resistive current of lightning arrester
CN102288804A (en) * 2011-07-20 2011-12-21 南京世都科技有限公司 Method for calculating resistive current of arrester based on orthogonal transformation
CN102680775A (en) * 2012-06-04 2012-09-19 北京四方继保自动化股份有限公司 Device and method for monitoring arrester resistance current by introducing unconventional potential transformer (PT)
CN102854431A (en) * 2011-07-01 2013-01-02 上海思盛信息科技事务所 Method for online detecting leakage resistive current of lightning arrestor

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0251075A (en) * 1988-08-12 1990-02-21 Nissin Electric Co Ltd Arrester monitoring apparatus
JP2000275294A (en) * 1999-03-25 2000-10-06 Mitsubishi Electric Corp Leakage current detecting device for zinc oxide lightning arrester
CN101359016A (en) * 2007-07-31 2009-02-04 上海电气自动化设计研究所有限公司 Method for detecting resistance leakage current of lightning arrester without voltage reference
CN101299062B (en) * 2008-07-01 2012-08-22 国网武汉高压研究院 Device for checking zinc oxide lightning arrester block property current tester
CN101986164B (en) * 2010-09-20 2012-11-28 华北电力大学（保定） Method for extracting resistive current of metal oxide arrester (MOA)
CN103207308B (en) * 2013-03-13 2015-08-26 福建省电力有限公司 The measuring method of arrester resistance current and capacity current transient value

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11191477A (en) * 1997-12-26 1999-07-13 Mitsubishi Electric Corp Leakage current detection device for arrester
KR20050003804A (en) * 2003-07-04 2005-01-12 학교법인 인하학원 Method and Device for measuring resistive leakage current by time-delay synthesis method in deciding the deterioration diagnosis of arrester
WO2011021887A2 (en) * 2009-08-20 2011-02-24 한국전기연구원 Method for detecting resistive leakage current of nonlinear element arrester using differential method and apparatus therefor
CN102043084A (en) * 2010-12-06 2011-05-04 上海思盛信息科技事务所 Method for detecting resistive current of lightning arrester
CN102854431A (en) * 2011-07-01 2013-01-02 上海思盛信息科技事务所 Method for online detecting leakage resistive current of lightning arrestor
CN102288804A (en) * 2011-07-20 2011-12-21 南京世都科技有限公司 Method for calculating resistive current of arrester based on orthogonal transformation
CN102680775A (en) * 2012-06-04 2012-09-19 北京四方继保自动化股份有限公司 Device and method for monitoring arrester resistance current by introducing unconventional potential transformer (PT)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王永强等: "考虑电网谐波影响的MOA在线检测方法", 《高电压技术》 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014139381A1 (en) * 2013-03-13 2014-09-18 国家电网公司 Method for measuring transient values of resistive current and capacitive current of lightning arrester
CN105277780A (en) * 2014-06-25 2016-01-27 国家电网公司 Voltage zero-crossing point obtaining method and device
US20170045567A1 (en) * 2015-08-10 2017-02-16 Xj Group Corporation Monitoring method and system of arrester applied to smart substation
CN105785171A (en) * 2016-03-07 2016-07-20 清华大学 Method for determining aging state of ZnO voltage-sensitive resistor disc according to higher harmonic characteristic of leakage current
CN112066516A (en) * 2020-08-03 2020-12-11 珠海格力电器股份有限公司 Air conditioner, fault self-diagnosis method, external unit positioning fault method and remote controller
CN112066516B (en) * 2020-08-03 2021-08-20 珠海格力电器股份有限公司 Air conditioner, fault self-diagnosis method, external unit positioning fault method and remote controller
CN115078938A (en) * 2022-08-22 2022-09-20 广东电网有限责任公司佛山供电局 Method and device for identifying insulating property of lightning arrester
CN115078938B (en) * 2022-08-22 2023-01-03 广东电网有限责任公司佛山供电局 Method and device for identifying insulating property of lightning arrester

Also Published As

Publication number Publication date
CN103207308B (en) 2015-08-26
WO2014139381A1 (en) 2014-09-18

Similar Documents

Publication Publication Date Title
CN103207308B (en) The measuring method of arrester resistance current and capacity current transient value
Suonan et al. Distance protection for HVDC transmission lines considering frequency-dependent parameters
CN102901856B (en) Cable run arrester resistance current detection method based on phase search
CN102967779B (en) Identifying method of distribution parameters of transmission line
CN103207307B (en) Test method of leakage current component of metal oxide arrester
CN103837799B (en) A kind of frequency domain method of voltage DC ground electrode circuit fault based on R-L model range finding
CN202975173U (en) Ground capacitance measuring instrument in transformer substation power distribution system
CN106646136B (en) Band damping turn-adjusting arc-extinguishing winding single-phase ground fault distance measuring method in parallel and system
CN114002475B (en) Online monitoring method for resistive current of lightning arrester
CN104316841A (en) Method for identifying all line parameters by means of fault recording data
CN110082596B (en) Distance protection fault impedance calculation method and system based on high-frequency transient quantity
CN103149483A (en) Lightning arrester on-line monitoring method based on capacitance network
CN108919026B (en) Live detection method for leakage current of lightning arrester
CN102082420B (en) Longitudinal differential protection method of power transmission line
CN107179476B (en) Distribution network fault distance measurement method
CN103245877A (en) Method for ranging single-phase earth fault of line by using single-end electric quantity
CN109557355A (en) Arrester resistance current on-line monitoring method based on hanning window phase difference method
CN108828292A (en) A kind of zinc oxide lightning arrester block property current on-line monitoring method for considering earthing bar and influencing
CN103163427A (en) Method for realizing line single-phase earth fault single-terminal fault locating by using real part of voltage drop along line
CN107870265A (en) A kind of power-to-ground capacitance detection method based on high-precision DFT
CN109444637A (en) A kind of arrester resistance current calculation method for considering harmonic wave and influencing
CN103278742A (en) Line single-phase earthing fault single-end ranging method realized by utilizing voltage drop imaginary part characteristics
CN102901873A (en) Device for measuring resistive current fundamental component of zinc oxide arrester
CN105158644A (en) Automatic distribution terminal with distribution network single-phase grounding fault detection function
CN105242174B (en) Based on impedance mapping function amplitude characteristic line single phase grounding failure distance measuring method

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant