CN107064749A - A kind of Fault Locating Method of complicated distribution line - Google Patents

A kind of Fault Locating Method of complicated distribution line Download PDF

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Publication number
CN107064749A
CN107064749A CN201710469887.2A CN201710469887A CN107064749A CN 107064749 A CN107064749 A CN 107064749A CN 201710469887 A CN201710469887 A CN 201710469887A CN 107064749 A CN107064749 A CN 107064749A
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CN
China
Prior art keywords
line
nodes
branch
branched
fault
Prior art date
Application number
CN201710469887.2A
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Chinese (zh)
Inventor
孟凡敏
王启明
王函旭
侯秋华
刘恒杰
刘增昕
亓晓燕
陈绪菊
马帅
胡昌伦
刘治国
陈霖
韩祥
任新伟
Original Assignee
国网山东省电力公司莱芜供电公司
国家电网公司
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Application filed by 国网山东省电力公司莱芜供电公司, 国家电网公司 filed Critical 国网山东省电力公司莱芜供电公司
Priority to CN201710469887.2A priority Critical patent/CN107064749A/en
Publication of CN107064749A publication Critical patent/CN107064749A/en

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    • 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
    • G01R31/08Locating faults in cables, transmission lines, or networks
    • G01R31/081Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/086Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
    • 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
    • G01R31/08Locating faults in cables, transmission lines, or networks
    • G01R31/088Aspects of digital computing

Abstract

The invention discloses a kind of Fault Locating Method of complicated distribution line, including:Step one, mathematical modeling is carried out to distribution line, sets up T nodes, the virtual T nodes that the actual T nodes and different line parameter circuit values section that the tie point that T nodes include actual branch circuit is set up are set up;Step 2, utilizes each plant stand mode information of database purchase power network, system equivalent impedance and distribution line parameter information;Step 3, according to possible position of the electric circle localization of faults of fault current, systematic parameter and each T nodes on main line;Any determined specifically to be likely to occur on bar branched line by branched line impedance parameter.The present invention, which is realized, only relies on system equivalent impedance, the virtual T nodal analysis methods of circuit just achievable distribution network line fault precise positioning, greatly improve distribution line line walking efficiency, enrich distribution scheduling instruction, shorten the failure line walking time, to improving Reliability of Power Supplying Net Work, distribution potential safety hazard is reduced significant.

Description

A kind of Fault Locating Method of complicated distribution line
Technical field
The present invention relates to the FLT field of distribution line, more particularly to a kind of failure of complicated distribution line are fixed Position method, is a kind of fast fault locating method for mixing model circuit and the complicated circuit of multidrop line.
Background technology
Power distribution network safe operation and user benefit are closely bound up, and healthy and strong intelligent distribution network is nowadays power network development trend, such as What ensures power distribution network safe and reliable operation, and reducing power distribution network power off time turns into current electric grid important topic.Distribution network failure stops Electricity is key factor of the line walking time length as influence power recovery after the main cause of power distribution network power loss, failure, this System aims at failure and quick and precisely positioned, to ensure that electric power is reliably supplied.
Due to device attribute reason, mid & low-voltage line turns into the main body that area power grid failure occurs, wherein 10kV distribution wires Road failure proportion is up to more than 90%.Conventional line walking mode is directly assigned scheduling according to faulty line by dispatcher and referred to Order, line management unit is to carry out all fronts without purpose for whole piece circuit to make an inspection tour, and wastes substantial amounts of manpower and materials.Especially work as Relatively long distance circuit if being maked an inspection tour since circuit head end, will take considerable time close to during the generation short circuit of end, postpone failure solution Time certainly, and then the power recovery time is postponed, increase loss electricity reduces power consumer satisfaction.And current, network distribution device Major part can not provide fault location information, even if can provide, and also only be the rough calculation for main line, and the degree of accuracy is not enough A large amount of moneys are expended to support the aid decision of scheduling, and fault location hardware unit is largely installed in complicated distribution line This, the application of this method has stronger realistic meaning.
The content of the invention
The purpose of the present invention be exactly in order to solve the above problems there is provided a kind of Fault Locating Method of complicated distribution line, The accurate method for providing location information, simple, intuitive, are calculated fast when can be broken down on the complicated distribution line of multiple-limb It is fast accurate, it is practical.
To achieve these goals, the present invention is adopted the following technical scheme that:
A kind of Fault Locating Method of complicated distribution line, comprises the following steps:
Step one, mathematical modeling is carried out to distribution line, sets up T nodes, T nodes include the tie point of actual branch circuit The virtual T nodes that the actual T nodes set up and different line parameter circuit values section are set up;
Step 2, is believed using each plant stand mode information of database purchase power network, system equivalent impedance and distribution line parameter Breath;
Step 3, according to the electric circle localization of faults of fault current, systematic parameter and each T nodes on main line Possible position;Any determined specifically to be likely to occur on bar branched line by branched line impedance parameter.
System side equivalence plant stand parameter includes three kinds of normal operating mode, maximum operational mode and minimum operational mode, just Based on the normal method of operation, supplemented by maximum operational mode and minimum operational mode.
In the step 3, before the trouble point determined is calculated and closest T nodes are failure boundary T nodes, Branched line on main line before failure boundary T nodes is the branch line set that possible break down.
When having two branched lines before failure boundary T nodes, if two branched line impedance parameters are equal, and positioning meter When the geographical length of the circuit that calculates is less than branch's line length, then its fault location point is:Abort situation is the failure calculated One in the abort situation that point position and two branched lines are calculated, and position location in two branch lines is from failure side The distance of boundary's T nodes is equal.
When having two branched lines before failure boundary T nodes, if the unit impedance parameter of branch line 1 is less than branch line 2, and The geographical length of circuit that both location Calculations go out is respectively less than respective line length, then its fault location point is:In branch line 1 Position location is from the position location for being more than branch line 2 with a distance from failure boundary T nodes, and abort situation is the trouble point position calculated Put one in the abort situation calculated with two branched lines.
When having two branched lines before virtual T nodes, if the unit impedance parameter of branch line 1 is more than branch line 2, and branch The geographical length of circuit that the location Calculation of line 1 goes out is less than its line length, and the geographical length of the circuit that the location Calculation of branch line 2 goes out is more than During its line length, its fault location point is:The collection for the abort situation that the position of failure point calculated is calculated with branch line 1 Close, abort situation is one of the two positions.
Beneficial effects of the present invention:
The present invention, which is realized, only relies on system equivalent impedance, the virtual T nodal analysis methods of circuit just achievable distribution network line Failure precise positioning, greatly improves distribution line line walking efficiency, distribution scheduling instruction is enriched, when shortening failure line walking Between, to improving Reliability of Power Supplying Net Work, reduce distribution potential safety hazard significant.
Brief description of the drawings
Fig. 1 is the virtual T nodes schematic diagram of new distribution line fault localization method.
Fig. 2 is new distribution line fault localization method fault location principle schematic.
In figure:1st, the equivalent plant stand of system side;2nd, T nodes;3rd, distribution main line;4th, the equivalent plant stand of load side;5th, branch line; 6th, the electric center of circle;7th, branched line position of failure point;8th, main line position of failure point.
Embodiment
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
A kind of Fault Locating Method of complicated distribution line, with reference to shown in Fig. 1-Fig. 2, comprises the following steps:
Step one, mathematical modeling is carried out to distribution line, mathematical modeling is carried out to distribution line, T nodes, T nodes is set up The virtual T nodes that the actual T nodes and different line parameter circuit values section that tie point including actual branch circuit is set up are set up;Such as Fig. 1 Shown, system side equivalence plant stand 1 is connected with the equivalent plant stand 4 of load side by distribution main line 3, and distribution main line 3 is provided with 3 Branch line 5 (branch line 1, branch line 2, branch line 3) and 3 T nodes 2 (T1, T2, T3);
Step 2, is believed using each plant stand mode information of database purchase power network, system equivalent impedance and distribution line parameter Breath;
Step 3, using T nodes as fault location border, each T node is represented using transformer station as the electric center of circle 6, is become Power station, can according to the electric circle of fault current, systematic parameter and each T nodes to the electric circle that T nodes electrical distance is radius Trouble point position on main line, i.e. abort situation is calculated necessarily to occur after which T node, the localization of faults with it is virtual After the position relationship of T nodes, all branched lines before this T node are trouble point set of fingers that may be present, and are had Which bar branched line body is likely to occur on, on which position of this branched line, is determined by branched line impedance parameter, The possibility set of position occurs using this position relationship failure judgement.
System side equivalence plant stand parameter includes three kinds of normal operating mode, maximum operational mode and minimum operational mode, just Based on the normal method of operation, supplemented by maximum operational mode and minimum operational mode.
In the step 3, before the trouble point determined is calculated and the nearest virtual T nodes of positional distance are failure side Branched line before boundary's T nodes, failure boundary T nodes is possibly realized the branch line set broken down, according to branched line Impedance parameter determines the possibility of fault location.
When having two branched lines before failure boundary T nodes, if two branched line impedance parameters are equal, and positioning meter When the geographical length (non-electrical distance) of the circuit that calculates is less than branch's line length, then its fault location point is:The master calculated The set for the abort situation that line position of failure point and two branched lines are calculated, and position location in two branch lines is from T The distance of node is equal.I.e. abort situation may be one of three positions.
When having two branched lines before virtual T nodes, if the unit impedance parameter of branch line 1 is less than branch line 2, and both The geographical length of circuit that location Calculation goes out is respectively less than respective line length, then its fault location point is:The main line event calculated The set for the abort situation that barrier point position and two branched lines are calculated, and position location in branch line 1 from T nodes away from May be one of three positions from the position location more than branch line 2, i.e. abort situation.
When having two branched lines before virtual T nodes, if the unit impedance parameter of branch line 1 is more than branch line 2, and branch The geographical length of circuit that the location Calculation of line 1 goes out is less than its line length, and the geographical length of the circuit that the location Calculation of branch line 2 goes out is more than During its line length, its fault location point is:The abort situation that the main line position of failure point calculated is calculated with branch line 1 Set, i.e. abort situation may be one of the two positions.
The accurate model of distribution line that reference picture 1 is set up based on T nodes, all parameters related to positioning of circuit All accurately it is added among model.T nodes in addition to the actual T nodes that branched line is implicitly present in reality, in addition to The virtual T nodes set up in the separation of different line type number sections, expand T node extensions.The system side equivalence parameter of plant stand 1 is examined Consider three kinds of normal operating mode, maximum operational mode and minimum operational mode, normal to run based on hairdo, minimax mode is It is auxiliary.
This method positioning principle is as shown in Figure 2.This distance-finding method positioning key point is to calculate trouble point and each virtual T nodes Relative position relation, this relation will define may generation branched line scope.If as illustrated, main line trouble point position 8 generations are put after the virtual T nodes T2 of main line, the branch line 1 before this T node is possibly realized generation with branch line 2 The branched line position of failure point 7 of failure is gathered, according to each parameter situation of branch line, it may occur however that a variety of positioning may.
If two branch line parameter is equal, and position length is less than branch's line length, then its fault location point is K1- Shown in 1 and K2-1;
If the unit impedance parameter of branch line 1 is less than branch line 2, and both position lengths are respectively less than respective line length, that Its fault location point is shown in K1-2 and K2-2;
If the unit impedance parameter of branch line 1 is more than branch line 2, and the position length of branch line 1 is less than its line length, branch When the position length of line 2 is more than its line length, its fault location point is that K2-3 is not actually existed shown in K1-3 and K2-3.Its Remaining possible positioning scenarios essence herewith three class, can the rest may be inferred.
Fault location under normal operating mode is main body positioning result, is accurate to main line and each possible branch all the way Certain point, main as accident line walking instructs result.This method considers system and line parameter circuit value error, and positioning result is taken Rational redundancy processing, it is ensured that positioning result is more effective.
Fault location result is used as aid decision under maximum, minimum operational mode, it is contemplated that system is can energy limit mode Under fault coverage, a point mode considers accident border T nodes, adapts to all kinds of fault state, in the current side of operation of uncertain system It can also provide and be accurately positioned in the case of formula, but fault location scope is larger, but for relative whole piece circuit, can still carry significantly High faulty line line walking efficiency.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, not to present invention protection model The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not Need to pay various modifications or deform still within protection scope of the present invention that creative work can make.

Claims (6)

1. a kind of Fault Locating Method of complicated distribution line, it is characterized in that, comprise the following steps:
Step one, mathematical modeling is carried out to distribution line, sets up T nodes, the tie point that T nodes include actual branch circuit is set up Actual T nodes and different line parameter circuit values section set up virtual T nodes;
Step 2, utilizes each plant stand mode information of database purchase power network, system equivalent impedance and distribution line parameter information;
Step 3, according to possibility of the electric circle localization of faults of fault current, systematic parameter and each T nodes on main line Position;Any determined specifically to be likely to occur on bar branched line by branched line impedance parameter.
2. a kind of Fault Locating Method of complicated distribution line as claimed in claim 1, it is characterized in that, system side equivalence plant stand ginseng Number includes three kinds of normal operating mode, maximum operational mode and minimum operational mode, based on normal operating mode, maximum operation side Supplemented by formula and minimum operational mode.
3. a kind of Fault Locating Method of complicated distribution line as claimed in claim 1, it is characterized in that, in the step 3, Before calculating the trouble point determined and closest T nodes be on failure boundary T nodes, main line failure boundary T nodes it Preceding branched line is the branch line set that possible break down.
4. a kind of Fault Locating Method of complicated distribution line as claimed in claim 3, it is characterized in that, failure boundary T nodes it Before when having two branched lines, if two branched line impedance parameters are equal, and the geographical length of circuit that location Calculation goes out is less than During branch's line length, then its fault location point is:Abort situation is the position of failure point and two branched line meters calculated Position location in one in the abort situation calculated, and two branch lines is equal from a distance from failure boundary T nodes.
5. a kind of Fault Locating Method of complicated distribution line as claimed in claim 3, it is characterized in that, failure boundary T nodes it Before when having two branched lines, if the unit impedance parameter of branch line 1 is less than branch line 2, and both location Calculations circuit for going out Reason length is respectively less than respective line length, then its fault location point is:Saved from failure boundary T position location in branch line 1 The distance of point is more than the position location of branch line 2, and abort situation is that the position of failure point and two branched lines calculated is calculated One in the abort situation gone out.
6. a kind of Fault Locating Method of complicated distribution line as claimed in claim 3, it is characterized in that, have before virtual T nodes During two branched lines, if the unit impedance parameter of branch line 1 is more than branch line 2, and the circuit that the location Calculation of branch line 1 goes out is geographical Length is less than its line length, when the geographical length of the circuit that the location Calculation of branch line 2 goes out is more than its line length, its fault location Put and be:The set for the abort situation that the position of failure point that calculates is calculated with branch line 1, abort situation be the two positions it One.
CN201710469887.2A 2017-06-20 2017-06-20 A kind of Fault Locating Method of complicated distribution line CN107064749A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109655718A (en) * 2019-02-25 2019-04-19 广东工业大学 A kind of electrical power distribution network fault location method
CN110244182A (en) * 2019-06-28 2019-09-17 国电南瑞南京控制系统有限公司 A kind of Fault Locating Method and system suitable for electric railway multipoint line

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1172660A2 (en) * 2000-07-11 2002-01-16 Abb Ab Method and device for fault location in distribution networks
EP1992954A1 (en) * 2007-05-18 2008-11-19 ABB Technology AG Method for determining location of phase-to-earth fault
US20090309612A1 (en) * 2006-09-19 2009-12-17 Abb Technology Ag Method and apparatus for determining circular characteristic
CN102830328A (en) * 2012-08-23 2012-12-19 上海交通大学 Distributed fault location method for T-circuit
CN102967802A (en) * 2012-12-13 2013-03-13 山东理工大学 Method for positioning power distribution network fault by using travelling wave
CN103076533A (en) * 2012-12-28 2013-05-01 华北电力大学(保定) Analysis method for line parameter and fault disturbance in power grid
CN104375055A (en) * 2013-08-15 2015-02-25 通用电气公司 Fault locating device and method of power distribution network
CN205263239U (en) * 2015-12-29 2016-05-25 贵州电网有限责任公司遵义供电局 Accurate positioning system's of distributing type transmission line trouble monitor terminal mounting structure

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1172660A2 (en) * 2000-07-11 2002-01-16 Abb Ab Method and device for fault location in distribution networks
US20090309612A1 (en) * 2006-09-19 2009-12-17 Abb Technology Ag Method and apparatus for determining circular characteristic
EP1992954A1 (en) * 2007-05-18 2008-11-19 ABB Technology AG Method for determining location of phase-to-earth fault
CN102830328A (en) * 2012-08-23 2012-12-19 上海交通大学 Distributed fault location method for T-circuit
CN102967802A (en) * 2012-12-13 2013-03-13 山东理工大学 Method for positioning power distribution network fault by using travelling wave
CN103076533A (en) * 2012-12-28 2013-05-01 华北电力大学(保定) Analysis method for line parameter and fault disturbance in power grid
CN104375055A (en) * 2013-08-15 2015-02-25 通用电气公司 Fault locating device and method of power distribution network
CN205263239U (en) * 2015-12-29 2016-05-25 贵州电网有限责任公司遵义供电局 Accurate positioning system's of distributing type transmission line trouble monitor terminal mounting structure

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王函旭: "基于分相矩阵算法的配电线路故障测距系统研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109655718A (en) * 2019-02-25 2019-04-19 广东工业大学 A kind of electrical power distribution network fault location method
CN110244182A (en) * 2019-06-28 2019-09-17 国电南瑞南京控制系统有限公司 A kind of Fault Locating Method and system suitable for electric railway multipoint line

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