CN103207308B - The measuring method of arrester resistance current and capacity current transient value - Google Patents
The measuring method of arrester resistance current and capacity current transient value Download PDFInfo
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- CN103207308B CN103207308B CN201310079901.XA CN201310079901A CN103207308B CN 103207308 B CN103207308 B CN 103207308B CN 201310079901 A CN201310079901 A CN 201310079901A CN 103207308 B CN103207308 B CN 103207308B
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- 230000001052 transient effect Effects 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005070 sampling Methods 0.000 claims abstract description 56
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 230000001012 protector Effects 0.000 claims abstract description 13
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims description 16
- 230000008878 coupling Effects 0.000 abstract description 5
- 238000010168 coupling process Methods 0.000 abstract description 5
- 238000005859 coupling reaction Methods 0.000 abstract description 5
- 230000008859 change Effects 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000013178 mathematical model Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 229910044991 metal oxide Inorganic materials 0.000 abstract 1
- 150000004706 metal oxides Chemical class 0.000 abstract 1
- 238000004458 analytical method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses a kind of arrester resistance current and capacity current transient value measuring method.First the present invention gathers leakage current sampled value and the A phase lightning arrester high side voltage sampled value of the three-phase lightning protector down conductor of each sampling instant; Utilize the amplitude of the phase angle of the fundamental frequency voltages of Fourier algorithm calculating A phase lightning arrester high side voltage, the amplitude of fundamental frequency voltages, the phase angle of tertiary voltage harmonic wave and tertiary voltage harmonic wave; Consider the impact of tertiary voltage harmonic wave and Coupling Between Phases electric capacity, calculate the capacity current in the leakage current obtaining three-phase metal oxide arrester and current in resistance property transient value.The present invention considers the impact of tertiary voltage harmonic wave and Coupling Between Phases electric capacity in mathematical model, achieve the accurate measurement to the current in resistance property in three-phase lightning protector leakage current and capacity current transient state process, achieve and each sampling instant is shortened to three-phase lightning protector insulating property monitoring time point, for finding lightning arrester insulation performance dynamic change situation, providing reliable basis for rapid development lightning arrester maintenance solution.
Description
Technical field
The present invention relates to electric equipment protection field, specifically relate to the measuring method of a kind of arrester resistance current and capacity current transient value.
Background technology
At present first-harmonic method, third harmonic method, harmonic analysis method and condenser current compensation method are mainly comprised to the measuring method of the current in resistance property in lightning arrester Leakage Current and capacity current, this several method monitoring accuracy is by Coupling Between Phases capacitive effect, harmonic analysis method due to calculated amount large, poor practicability; First-harmonic method, third harmonic method and condenser current compensation rule need to 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, cannot accomplish the whole transient research and application to the current in resistance property in lightning arrester Leakage Current and capacity current, real-time is not strong.
Summary of the invention
The object of the invention is to the deficiency overcoming prior art existence, a kind of calculated amount is less, practical, can realize carrying out the current in resistance property in leakage current of an arrester and capacity current the whole transient research and application arrester resistance current and capacity current transient value measuring method are provided.
The object of the invention is to be realized by following approach:
Arrester resistance current and capacity current transient value measuring method, its main points are, comprise the steps:
(1) provide a kind of measurement mechanism, it gathers the leakage current sampled value of A, B, C three-phase lightning protector down conductor of each sampling instant and the A phase lightning arrester high side voltage sampled value of each sampling instant;
(2) measurement mechanism calculates current in resistance property value iAr (t) in t sampling instant A phase leakage current of an arrester according to its charge value obtained:
Measurement mechanism calculates the capacity current value i in t sampling instant A phase leakage current of an arrester
ac(t):
(3) measurement mechanism calculates the current in resistance property value i in t sampling instant B phase leakage current of an arrester
br(t):
Measurement mechanism calculates the capacity current value i in t sampling instant B phase leakage current of an arrester
bc(t):
(4) measurement mechanism calculates the current in resistance property value i in t sampling instant C phase leakage current of an arrester
cr(t):
Measurement mechanism calculates the capacity current value i in t sampling instant C phase leakage current of an arrester
cc(t):
Wherein, i
a(t), i
b(t), i
ct () is respectively the leakage current sampled value that t sampling instant flows through A, B, C phase arrester ground downlead; i
0(t
1)=i
a(t
1)+i
b(t
1)+i
c(t
1); i
a(t
1) be t
1sampling instant flows through the leakage current sampled value of A phase arrester ground downlead; i
a(t
2) be t
2sampling instant flows through the leakage current sampled value of A phase arrester ground downlead; i
b(t
1) be t
1sampling instant flows through the leakage current sampled value of B phase arrester ground downlead; i
c(t
1) be t
1sampling instant flows through the leakage current sampled value of C phase arrester ground downlead;
T
1for A phase lightning arrester high side voltage waveform pass zero point sampling instant and meet 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
1for the phase angle of the fundamental frequency voltages of A phase lightning arrester high side voltage; θ
3for the phase angle of the third harmonic voltage of A phase lightning arrester high side voltage; U
1mfor the amplitude of the fundamental frequency voltages of A phase lightning arrester high side voltage; U
3mfor the amplitude of 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 electric system angular frequency;
(5) the current in resistance property transient value in A, B, C three-phase lightning protector Leakage Current of being calculated of measurement mechanism and capacity current transient value store.
Technique scheme has following beneficial effect:
The inventive method considers the impact of tertiary voltage harmonic wave and Coupling Between Phases electric capacity from mathematical model, achieve the accurate measurement to the current in resistance property in three-phase lightning protector leakage current and capacity current the whole transient, achieve and each sampling instant is shortened to the monitoring time point of three-phase lightning protector insulating property, for finding lightning arrester insulation performance dynamic change situation, providing reliable basis for rapid development lightning arrester maintenance solution.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of a kind of arrester resistance current of providing of the embodiment of the present invention and capacity current transient value measuring method.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing embodiment of the present invention being done and describing in detail further.
The embodiment of the present invention first Real-time Collection t sampling instant flows through the leakage current i of A, B, C three-phase lightning protector of A, B, C three-phase lightning protector down conductor
a(t), i
b(t), i
c(t), Real-time Collection t sampling instant A phase lightning arrester high side voltage u
a(t); Wherein, t is any sampling instant.
Fourier algorithm is utilized to calculate the phase angle theta of the fundamental frequency voltages of A phase lightning arrester high side voltage
1with the amplitude U of fundamental frequency voltages
1m, utilize Fourier algorithm to calculate the phase angle theta of the tertiary voltage harmonic wave of A phase lightning arrester high side voltage
3with the amplitude U of tertiary voltage harmonic wave
3m.
Calculate the current in resistance property value i in t sampling instant A phase leakage current of an arrester
ar(t):
Calculate the capacity current value i in t sampling instant A phase leakage current of an arrester
ac(t):
Calculate the current in resistance property value i in t sampling instant B phase leakage current of an arrester
br(t):
Calculate the capacity current value i in t sampling instant B phase leakage current of an arrester
bc(t):
Calculate the current in resistance property value i in t sampling instant C phase leakage current of an arrester
cr(t):
Calculate the capacity current value i in t sampling instant C phase leakage current of an arrester
cc(t):
Wherein, i
a(t), i
b(t), i
ct () is respectively the leakage current sampled value that t sampling instant flows through A, B, C phase arrester ground downlead; i
0(t
1)=i
a(t
1)+i
b(t
1)+i
c(t
1); i
a(t
1) be t
1sampling instant flows through the leakage current sampled value of A phase arrester ground downlead; i
a(t
2) be t
2sampling instant flows through the leakage current sampled value of A phase arrester ground downlead; i
b(t
1) be t
1sampling instant flows through the leakage current sampled value of B phase arrester ground downlead; i
c(t
1) be t
1sampling instant flows through the leakage current sampled value of C phase arrester ground downlead;
T
1for A phase lightning arrester high side voltage waveform pass zero point sampling instant and meet u
a(t
1-△ is <0 and u t)
a(t
1+ △ is >0 t); 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
1for the phase angle of the fundamental frequency voltages of A phase lightning arrester high side voltage; θ
3for the phase angle of the third harmonic voltage of A phase lightning arrester high side voltage; U
1mfor the amplitude of the fundamental frequency voltages of A phase lightning arrester high side voltage; U
3mfor the amplitude of 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 electric system angular frequency.
The inventive method considers the impact of tertiary voltage harmonic wave and Coupling Between Phases electric capacity in mathematical model, achieve the accurate measurement to the current in resistance property in three-phase lightning protector leakage current and capacity current transient state process, achieve and each sampling instant is shortened to three-phase lightning protector insulating property monitoring time point, for finding lightning arrester insulation performance dynamic change situation, providing reliable basis for rapid development lightning arrester maintenance solution.
The foregoing is only 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 change 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 value, is characterized in that, comprises the following steps:
(1) provide a kind of measurement mechanism, it gathers the leakage current sampled value of A, B, C three-phase lightning protector down conductor of each sampling instant and the A phase lightning arrester high side voltage sampled value of each sampling instant;
(2) measurement mechanism calculates the current in resistance property transient value i in t sampling instant A phase leakage current of an arrester according to its charge value obtained
ar(t):
Measurement mechanism calculates the capacity current transient value i in t sampling instant A phase leakage current of an arrester
ac(t):
(3) measurement mechanism calculates the current in resistance property transient value i in t sampling instant B phase leakage current of an arrester
br(t):
Measurement mechanism calculates the capacity current transient value i in t sampling instant B phase leakage current of an arrester
bc(t):
(4) measurement mechanism calculates the current in resistance property transient value i in t sampling instant C phase leakage current of an arrester
cr(t):
Measurement mechanism calculates the capacity current transient value i in t sampling instant C phase leakage current of an arrester
cc(t):
Wherein, iA (t), iB (t), iC (t) are respectively the leakage current sampled value that t sampling instant flows through A, B, C phase arrester ground downlead; I0 (t1)=iA (t1)+iB (t1)+iC (t1); i
a(t
1) be t
1sampling instant flows through the leakage current sampled value of A phase arrester ground downlead; i
a(t
2) be t
2sampling instant flows through the leakage current sampled value of A phase arrester ground downlead; i
b(t
1) be t
1sampling instant flows through the leakage current sampled value of B phase arrester ground downlead; i
c(t
1) be t
1sampling instant flows through the leakage current sampled value of C phase arrester ground downlead;
T
1for A phase lightning arrester high side voltage waveform pass zero point sampling instant and meet u
a(t
1-△ is <0 and u t)
a(t
1+ △ is >0 t); 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
1for the phase angle of the fundamental frequency voltages of A phase lightning arrester high side voltage; θ
3for the phase angle of the third harmonic voltage of A phase lightning arrester high side voltage; U1m is the amplitude of the fundamental frequency voltages of A phase lightning arrester high side voltage; U3m is the amplitude of 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 electric system angular frequency;
(5) the current in resistance property transient value in A, B, C three-phase lightning protector Leakage Current of being calculated of measurement mechanism and capacity current transient value store.
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 CN103207308A (en) | 2013-07-17 |
| CN103207308B true 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) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105277780A (en) * | 2014-06-25 | 2016-01-27 | 国家电网公司 | Voltage zero-crossing point obtaining method and device |
| CN105044524B (en) * | 2015-08-10 | 2018-12-04 | 许继集团有限公司 | A kind of arrester monitoring method and system suitable for intelligent 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0251075A (en) * | 1988-08-12 | 1990-02-21 | Nissin Electric Co Ltd | Arrester monitoring apparatus |
| JPH11191477A (en) * | 1997-12-26 | 1999-07-13 | Mitsubishi Electric Corp | Leakage current detection device for arrester |
| JP2000275294A (en) * | 1999-03-25 | 2000-10-06 | Mitsubishi Electric Corp | Leakage current detecting device for zinc oxide lightning arrester |
| KR100498927B1 (en) * | 2003-07-04 | 2005-07-04 | 학교법인 인하학원 | Method and Device for measuring resistive leakage current by time-delay synthesis method in deciding the deterioration diagnosis of 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 |
| KR101086878B1 (en) * | 2009-08-20 | 2011-11-25 | 한국전기연구원 | Method for measuring resistive leakage current of nonlinear device lightning arrester with differential and apparatus thereof |
| 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) |
| CN102043084B (en) * | 2010-12-06 | 2014-10-15 | 上海思盛信息科技事务所 | Method for detecting resistive current of lightning arrester |
| CN102854431B (en) * | 2011-07-01 | 2014-11-19 | 上海思盛信息科技事务所 | Method for online detecting leakage resistive current of lightning arrestor |
| CN102288804B (en) * | 2011-07-20 | 2014-07-30 | 南京世都科技有限公司 | Method for calculating resistive current of arrester based on orthogonal transformation |
| CN102680775B (en) * | 2012-06-04 | 2014-09-17 | 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) |
| 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 |
-
2013
- 2013-03-13 CN CN201310079901.XA patent/CN103207308B/en active Active
-
2014
- 2014-03-10 WO PCT/CN2014/073108 patent/WO2014139381A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN103207308A (en) | 2013-07-17 |
| WO2014139381A1 (en) | 2014-09-18 |
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