CN103762569A - Two phrase grounding short circuit fault direction discriminating method of double circuit lines on the same tower - Google Patents

Two phrase grounding short circuit fault direction discriminating method of double circuit lines on the same tower Download PDF

Info

Publication number
CN103762569A
CN103762569A CN201410053693.0A CN201410053693A CN103762569A CN 103762569 A CN103762569 A CN 103762569A CN 201410053693 A CN201410053693 A CN 201410053693A CN 103762569 A CN103762569 A CN 103762569A
Authority
CN
China
Prior art keywords
zero
phrase
same tower
phase
voltage
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
CN201410053693.0A
Other languages
Chinese (zh)
Other versions
CN103762569B (en
Inventor
林富洪
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 CN201410053693.0A priority Critical patent/CN103762569B/en
Publication of CN103762569A publication Critical patent/CN103762569A/en
Application granted granted Critical
Publication of CN103762569B publication Critical patent/CN103762569B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

The invention discloses a two phrase grounding short circuit fault direction discriminating method of double circuit lines on the same tower. The two phrase grounding short circuit fault direction discriminating method of double circuit lines on the same tower measures the three-phrase voltage, zero-sequence voltage and the zero-sequence current of a single-circuit line in double-circuit lines on the same tower. Launching judging evidence is formed by the phrase angle relationship between the zero-sequence current and the zero-sequence voltage so that whether a fault occurs in the protected circuit line can be discriminated. A polarized voltage is obtained by subtracting two fault phrase voltages from the zero-sequence voltage. A relay protection judging evidence is formed by the phrase angle relationship between the zero-sequence current and the polarized voltage so that whether a positive direction fault or an opposite direction fault occurs in the protected circuit line can be accurately discriminated. According to the two phrase grounding short circuit fault direction discriminating method of double circuit lines on the same tower, a relay protection judging evidence is formed by the phrase angle relationship between the zero-sequence current and the polarized voltage, so that impacts of zero-sequence mutual inductance between lines to protecting dynamic performances can be eliminated theoretically, the fault direction can be actually discriminated, and relay protection malfunction happening when the opposite direction fault occurs in the protected circuit line can be effectively prevented.

Description

Analyses for double circuits on same tower two-phase short circuit and ground fault discriminating direction method
Technical field
The present invention relates to Relay Protection Technology in Power System field, specifically relate to a kind of analyses for double circuits on same tower two-phase short circuit and ground fault discriminating direction method.
Background technology
Analyses for double circuits on same tower has that floor space is few, cost is low, connects operation of power networks reliable and stable, has become a kind of common transmission line connected mode of electric power system.One loop line road of analyses for double circuits on same tower occurs after two-phase short circuit and ground fault, the zero-sequence current that flows through faulty line produces induction residual voltage by zero-sequence mutual inductance between line on adjacent lines, responded to the impact of residual voltage, zero-sequence direction component can be judged as faulty line by the protected circuit of normally operation by mistake, cause zero-sequence direction component misoperation, when there is two-phase high resistance ground short trouble in a loop line road of analyses for double circuits on same tower especially, responded to the impact of residual voltage, zero-sequence direction component is misoperation usually, cause normal working line to be excised by mistake, to power network safety operation, bring very adverse influence.
Summary of the invention
The object of the invention is to overcome the deficiency that prior art exists, provide a kind of performance not to be subject to the analyses for double circuits on same tower two-phase short circuit and ground fault discriminating direction method that between line, zero-sequence mutual inductance affects.
For completing above-mentioned purpose, the present invention adopts following technical scheme:
Analyses for double circuits on same tower two-phase short circuit and ground fault discriminating direction method, is characterized in that, comprises following sequential steps:
(1) protector measuring analyses for double circuits on same tower I returns the A phase voltage of route protection installation place
Figure BDA0000466713730000011
b phase voltage
Figure BDA0000466713730000012
c phase voltage
Figure BDA0000466713730000013
residual voltage
Figure BDA0000466713730000014
zero-sequence current
Figure BDA0000466713730000015
(2) protective device judgement
Figure BDA0000466713730000016
with
Figure BDA0000466713730000017
Figure BDA0000466713730000018
whether set up, if set up simultaneously, there is BC phase circuit two-phase short circuit and ground fault in protective device judgement analyses for double circuits on same tower I loop line road positive direction simultaneously; Wherein, Z i0the zero sequence system equivalent impedance that goes back to route protection installation place for I; Arg (Z i0) be Z i0phase angle;
(3) protective device judgement
Figure BDA0000466713730000021
with
Figure BDA0000466713730000022
Figure BDA0000466713730000023
whether set up, if set up simultaneously, there is CA phase circuit two-phase short circuit and ground fault in protective device judgement analyses for double circuits on same tower I loop line road positive direction simultaneously; Wherein, Z i0the zero sequence system equivalent impedance that goes back to route protection installation place for I; Arg (Z i0) be Z i0phase angle;
(4) protective device judgement
Figure BDA0000466713730000024
with
Figure BDA0000466713730000025
Figure BDA0000466713730000026
whether set up, if set up simultaneously, there is AB phase circuit two-phase short circuit and ground fault in protective device judgement analyses for double circuits on same tower I loop line road positive direction simultaneously; Wherein, Z i0the zero sequence system equivalent impedance that goes back to route protection installation place for I; Arg (Z i0) be Z i0phase angle.
Feature of the present invention and technological achievement:
The inventive method is measured three-phase voltage, residual voltage and the zero-sequence current of single back line in analyses for double circuits on same tower; utilize the angle relationship between zero-sequence current and residual voltage to form start-up criterion; whether differentiate protected circuit breaks down; utilize residual voltage to deduct two fault phase voltages and obtain polarizing voltage; utilize the angle relationship between zero-sequence current and polarizing voltage to form relaying protection criterion, accurately differentiate protected circuit generation positive direction fault or reverse direction failure occurs.
The inventive method utilizes the angle relationship between zero-sequence current and polarizing voltage to form relaying protection criterion; in principle, eliminated the impact of zero-sequence mutual inductance on Perfomance of protective relaying between line; accurate Judging fault direction, during effectively anti-only protected circuit reverse direction failure, protective relaying maloperation is done.
Accompanying drawing explanation
Fig. 1 is application analyses for double circuits on same tower transmission system schematic diagram of the present invention.
Embodiment
Below in conjunction with the drawings and embodiment the present invention will be further described.
With reference to figure 1, for applying analyses for double circuits on same tower transmission system schematic diagram of the present invention.Protector measuring analyses for double circuits on same tower I returns the A phase voltage of route protection installation place
Figure BDA0000466713730000027
b phase voltage
Figure BDA0000466713730000028
c phase voltage
Figure BDA0000466713730000029
residual voltage zero-sequence current
Figure BDA0000466713730000031
Protective device judgement
Figure BDA0000466713730000032
with
Figure BDA0000466713730000033
Figure BDA0000466713730000034
whether set up, if set up simultaneously, there is BC phase circuit two-phase short circuit and ground fault in protective device judgement analyses for double circuits on same tower I loop line road positive direction simultaneously; Wherein, Z i0the zero sequence system equivalent impedance that goes back to route protection installation place for I; Arg (Z i0) be Z i0phase angle.
Protective device judgement with
Figure BDA0000466713730000036
whether set up, if set up simultaneously, there is CA phase circuit two-phase short circuit and ground fault in protective device judgement analyses for double circuits on same tower I loop line road positive direction simultaneously; Wherein, Z i0the zero sequence system equivalent impedance that goes back to route protection installation place for I; Arg (Z i0) be Z i0phase angle.
Protective device judgement
Figure BDA0000466713730000038
with
Figure BDA0000466713730000039
Figure BDA00004667137300000310
whether set up, if set up simultaneously, there is AB phase circuit two-phase short circuit and ground fault in protective device judgement analyses for double circuits on same tower I loop line road positive direction simultaneously; Wherein, Z i0the zero sequence system equivalent impedance that goes back to route protection installation place for I; Arg (Z i0) be Z i0phase angle.
The inventive method is measured three-phase voltage, residual voltage and the zero-sequence current of single back line in analyses for double circuits on same tower; utilize the angle relationship between zero-sequence current and residual voltage to form start-up criterion; whether differentiate protected circuit breaks down; utilize residual voltage to deduct two fault phase voltages and obtain polarizing voltage; utilize the angle relationship between zero-sequence current and polarizing voltage to form relaying protection criterion, accurately differentiate protected circuit generation positive direction fault or reverse direction failure occurs.The inventive method utilizes the angle relationship between zero-sequence current and polarizing voltage to form relaying protection criterion; in principle, eliminated the impact of zero-sequence mutual inductance on Perfomance of protective relaying between line; accurate Judging fault direction, during effectively anti-only protected circuit reverse direction failure, protective relaying maloperation is done.
The foregoing is only preferred embodiment of the present invention; but protection scope of the present invention is not limited to this; 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, within all should being encompassed in protection scope of the present invention.

Claims (1)

1. analyses for double circuits on same tower two-phase short circuit and ground fault discriminating direction method, comprises following sequential steps:
(1) protector measuring analyses for double circuits on same tower I returns the A phase voltage of route protection installation place
Figure FDA0000466713720000011
b phase voltage c phase voltage residual voltage
Figure FDA0000466713720000014
zero-sequence current
(2) protective device judgement
Figure FDA0000466713720000016
with
Figure FDA0000466713720000018
whether set up, if set up simultaneously, there is BC phase circuit two-phase short circuit and ground fault in protective device judgement analyses for double circuits on same tower I loop line road positive direction simultaneously; Wherein, Z i0the zero sequence system equivalent impedance that goes back to route protection installation place for I; Arg (Z i0) be Z i0phase angle;
(3) protective device judgement
Figure FDA0000466713720000019
with
Figure FDA00004667137200000111
whether set up, if set up simultaneously, there is CA phase circuit two-phase short circuit and ground fault in protective device judgement analyses for double circuits on same tower I loop line road positive direction simultaneously; Wherein, Z i0the zero sequence system equivalent impedance that goes back to route protection installation place for I; Arg (Z i0) be Z i0phase angle;
(4) protective device judgement
Figure FDA00004667137200000112
with
Figure FDA00004667137200000113
whether set up, if set up simultaneously, there is AB phase circuit two-phase short circuit and ground fault in protective device judgement analyses for double circuits on same tower I loop line road positive direction simultaneously; Wherein, Z i0the zero sequence system equivalent impedance that goes back to route protection installation place for I; Arg (Z i0) be Z i0phase angle.
CN201410053693.0A 2014-02-18 2014-02-18 Analyses for double circuits on same tower two-phase short circuit and ground fault discriminating direction method Active CN103762569B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410053693.0A CN103762569B (en) 2014-02-18 2014-02-18 Analyses for double circuits on same tower two-phase short circuit and ground fault discriminating direction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410053693.0A CN103762569B (en) 2014-02-18 2014-02-18 Analyses for double circuits on same tower two-phase short circuit and ground fault discriminating direction method

Publications (2)

Publication Number Publication Date
CN103762569A true CN103762569A (en) 2014-04-30
CN103762569B CN103762569B (en) 2016-04-06

Family

ID=50529759

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410053693.0A Active CN103762569B (en) 2014-02-18 2014-02-18 Analyses for double circuits on same tower two-phase short circuit and ground fault discriminating direction method

Country Status (1)

Country Link
CN (1) CN103762569B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104076240A (en) * 2014-07-15 2014-10-01 国家电网公司 Extra-high voltage alternating current transmission line three-phase short-circuit failure recognition method
CN104950225A (en) * 2015-06-17 2015-09-30 国家电网公司 Double-circuit line different phase overline grounding fault direction decision method
CN105699852A (en) * 2016-03-29 2016-06-22 国网福建省电力有限公司 Power transmission line grounding fault phase selection method capable of resisting distributed capacitive current and transition resistance effect
CN109581085A (en) * 2018-12-05 2019-04-05 广东电网有限责任公司 A kind of collection electric wire and fault of interconnected transmission line discriminating direction method
CN111965477A (en) * 2020-06-30 2020-11-20 中国电力科学研究院有限公司 Method and system for determining short-circuit current by considering zero sequence mutual inductance influence
CN113687267A (en) * 2021-09-14 2021-11-23 广东电网有限责任公司 High-resistance grounding fault direction detection method, system, equipment and storage medium

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1588729A (en) * 2004-10-14 2005-03-02 南京南瑞继保电气有限公司 Re-switch on method for electric tansmission device
CN102023277A (en) * 2009-09-17 2011-04-20 上海市电力公司超高压输变电公司 Homonymic phase inter-line fault phase selection method of four-parallel line on same tower based on twelve-sequence component

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1588729A (en) * 2004-10-14 2005-03-02 南京南瑞继保电气有限公司 Re-switch on method for electric tansmission device
CN102023277A (en) * 2009-09-17 2011-04-20 上海市电力公司超高压输变电公司 Homonymic phase inter-line fault phase selection method of four-parallel line on same tower based on twelve-sequence component

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
杨隽坤等: "同杆并架双回线保护中的距离保护", 《广东电力》, vol. 18, no. 10, 31 October 2005 (2005-10-31) *
王剑等: "330kV同塔双回线路过电压计算及分析", 《高电压技术》, vol. 37, no. 10, 31 October 2011 (2011-10-31), pages 2450 - 2457 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104076240A (en) * 2014-07-15 2014-10-01 国家电网公司 Extra-high voltage alternating current transmission line three-phase short-circuit failure recognition method
CN104076240B (en) * 2014-07-15 2016-08-24 国家电网公司 Ultrahigh voltage alternating current transmission lines three phase short circuit fault recognition methods
CN104950225A (en) * 2015-06-17 2015-09-30 国家电网公司 Double-circuit line different phase overline grounding fault direction decision method
CN105699852A (en) * 2016-03-29 2016-06-22 国网福建省电力有限公司 Power transmission line grounding fault phase selection method capable of resisting distributed capacitive current and transition resistance effect
CN105699852B (en) * 2016-03-29 2018-10-19 国网福建省电力有限公司 The transmission lines earth fault phase-selecting method that capable of preventing distributed capacitive current and transitional resistance influences
CN109581085A (en) * 2018-12-05 2019-04-05 广东电网有限责任公司 A kind of collection electric wire and fault of interconnected transmission line discriminating direction method
CN111965477A (en) * 2020-06-30 2020-11-20 中国电力科学研究院有限公司 Method and system for determining short-circuit current by considering zero sequence mutual inductance influence
CN113687267A (en) * 2021-09-14 2021-11-23 广东电网有限责任公司 High-resistance grounding fault direction detection method, system, equipment and storage medium
CN113687267B (en) * 2021-09-14 2023-08-04 广东电网有限责任公司 High-resistance ground fault direction detection method, system, equipment and storage medium

Also Published As

Publication number Publication date
CN103762569B (en) 2016-04-06

Similar Documents

Publication Publication Date Title
CN103762569B (en) Analyses for double circuits on same tower two-phase short circuit and ground fault discriminating direction method
CN104779594B (en) Small current neutral grounding power system phase fault and single-phase grounding comprehensive protecting method
KR102460706B1 (en) Apparatus and method detecting direction of fault current
CN101593964B (en) Method for longitudinal zero-sequence power direction protection of double circuit line on same pole
CN104267311A (en) Phase selection method for faults of double-circuit lines on same tower
CN103954879B (en) A kind of band shunt reactor double circuit lines character method of discrimination
CN103762574B (en) The non-same famous prime minister's cross-line impedance ground distance protecting method of double-circuit line
CN106501683A (en) One kind is without main website power distribution network one-way earth fault localization method
CN105337256A (en) Zero sequence voltage compensation element locking method for double-circuit same-tower line
CN105044543A (en) Electric reactor fault determination method after PT disconnection
CN103760458A (en) Single-phase grounding fault direction discriminating method of double-circuit lines on the same tower
CN103795042B (en) Pilot protection system and guard method thereof based on virtual transition impedance
CN104076248A (en) Fault direction judgment method based on positive-sequence polarization voltage phase comparison
CN103545798A (en) Distance protection method of fault opening elements in swing block
CN103760472B (en) Analyses for double circuits on same tower fault phase sequence of the same name diagnostic method
CN104716634A (en) Distance protection method and system
CN100581020C (en) Method for realizing line high-resistance fast trip using zero-sequence loop fuction
CN103944151B (en) A kind of guard method of many times parallel circuit different name phase two points ground fault of isolated neutral system
CN104078953B (en) A kind of transmission line of electricity inter-phase arc voltage protection method
CN103296657B (en) Overload faulty action preventing and the line single-phase earth fault distance protection method of resistance to high resistant
CN105391035A (en) Fault factors based power transmission line differential protection system and protection method
CN105291879A (en) Anode grounding reclosing method used for maglev vehicle power supply system
CN104111407A (en) Fault detection method based on impedance ratio same-tower power transmission line transverse differential protection
CN103151764B (en) Electric transmission line one-phase grounding fault full-component voltage protection method
CN105846404B (en) Transmission line of electricity ground distance protection III segment protection methods

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
CP01 Change in the name or title of a patent holder
CP01 Change in the name or title of a patent holder

Address after: 100031 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing

Co-patentee after: STATE GRID FUJIAN ELECTRIC POWER Co.,Ltd.

Patentee after: STATE GRID CORPORATION OF CHINA

Co-patentee after: STATE GRID PUTIAN ELECTRIC POWER SUPPLY Co.

Address before: 100031 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing

Co-patentee before: STATE GRID FUJIAN ELECTRIC POWER Co.,Ltd.

Patentee before: State Grid Corporation of China

Co-patentee before: STATE GRID PUTIAN ELECTRIC POWER SUPPLY Co.

CP03 Change of name, title or address
CP03 Change of name, title or address

Address after: 351100 No. 999, South Garden Road, Xia Lin Street, Chengxiang District, Putian, Fujian

Co-patentee after: STATE GRID FUJIAN ELECTRIC POWER Co.,Ltd.

Patentee after: STATE GRID PUTIAN ELECTRIC POWER SUPPLY Co.

Co-patentee after: STATE GRID CORPORATION OF CHINA

Address before: 100031 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing

Co-patentee before: STATE GRID FUJIAN ELECTRIC POWER Co.,Ltd.

Patentee before: State Grid Corporation of China

Co-patentee before: STATE GRID PUTIAN ELECTRIC POWER SUPPLY Co.