CN104914356A - Distribution network fault positioning method based on network structure matrix - Google Patents
Distribution network fault positioning method based on network structure matrix Download PDFInfo
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- CN104914356A CN104914356A CN201510343868.6A CN201510343868A CN104914356A CN 104914356 A CN104914356 A CN 104914356A CN 201510343868 A CN201510343868 A CN 201510343868A CN 104914356 A CN104914356 A CN 104914356A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The invention discloses a distribution network fault positioning method based on a network structure matrix. The method comprises steps: according to a distribution network structure in a positioning region, a distribution network topology matrix D for reflecting an adjacency relationship between a feeder line section and each node; according to current monitoring data acquired by a line measurement device corresponding to each node, a measurement column vector G is generated; each row element of the distribution network topology matrix D and an element of the measurement column vector G are multiplied respectively according to a bit, a fault positioning matrix F is obtained according to the multiplication result; and finally, according to the fault positioning matrix F, whether short circuit fault or ground fault happens to each feeder line section is judged. Through one-time calculation of the network topology matrix and the measurement column vector, the fault region can be positioned directly, the method is simple, the calculation amount is small, the speed is fast, favorable conditions are created for timely finding out and cutting fault lines, and distribution network operation stability and power supply reliability are improved.
Description
Technical field
The present invention relates to a kind of method that short circuit to occurring in power distribution network or earth fault carry out detection and positioning, belonging to power transmission and distribution technical field.
Background technology
Power distribution network is the important power supply facilities of city and country, the production of its running status and people and live closely bound up, distribution network failure is carried out fast, accurately detects and accurately locate, be excise faulty line in time, improve the prerequisite of power distribution network operation stability and power supply reliability.At present, the method for carrying out localization of fault based on various line facility emerges in an endless stream, and the localization method of employing is also very many, and these methods respectively have feature.But many deficiencies such as existing localization method still exists method complexity, it is loaded down with trivial details to locate, poor real, need to study further.
Summary of the invention
The object of the invention is to the drawback for prior art, provide that a kind of method is simple, location is quick, the good Distribution Network Failure localization method of real-time, to improve the stability and Supply Security that power distribution network runs.
Problem of the present invention solves with following technical proposals:
Based on a Distribution Network Failure localization method for network structure matrix, described method, first according to the distribution net work structure in locating area, generates the power distribution network topological matrix D of reflection feed line segment and each node annexation; Again according to the current monitoring data that the measurement mechanism corresponding with each node obtains, generate and measure column vector G, then each row element of power distribution network topological matrix D is carried out step-by-step with the element measuring column vector G to be respectively multiplied, obtain localization of fault matrix F according to multiplied result, finally judge whether each feed line segment exists short circuit or earth fault according to localization of fault matrix F.
The above-mentioned Distribution Network Failure localization method based on network structure matrix, said method comprising the steps of:
A. by isolating switch, on-load switch or All other routes monitoring device) be considered as node, internodal feed line segment is considered as branch road, node in locating area and feed line segment are numbered respectively, and specify the positive dirction of power delivery, then according to the positive dirction generating network topological matrix D of numbering result and power delivery:
，
Wherein, m is feed line segment sum, and n is node total number,
represent the syntople of i-th feed line segment and a jth node, its numerical value is determined as follows:
If i-th feed line segment is connected with a jth node, and positive flows into i-th feed line segment from a jth node, then
=1; If i-th feed line segment is connected with a jth node, and positive flows into a jth node from i-th feed line segment, then
=-1; If i-th feed line segment is not connected with a jth node, then
=0;
B. utilize route survey device to monitor the electric current flowing through each node, measure column vector according to the current monitoring data genaration obtained
:
，
The numerical value of its element is determined as follows: if i-th node has fault overcurrent (namely electric current is more than or equal to setting valve) and the direction of excess current is consistent with the positive dirction of supposition, then measure i-th element of column vector G
=1; If i-th node has fault overcurrent and the positive dirction of the direction of excess current and supposition is contrary, then
=-1; If i-th node does not have excess current (namely electric current is less than setting valve), then
=0;
C. each row of matrix D is carried out step-by-step with column vector G to be respectively multiplied, obtain primary fault positional matrix
:
；
D. by primary fault positional matrix
each row element be transformed into an element, obtain localization of fault matrix F:
，
Transformation rule is: if primary fault positional matrix
the i-th row element only have-1 or 0, then i-th element of localization of fault matrix F
=-1; If primary fault positional matrix
the i-th row element only have 1 or 0, then i-th element of localization of fault matrix F
=1; If primary fault positional matrix
the i-th row element both do not only had 0 or have 1 and-1 simultaneously, then
=0;
E. judge whether power distribution network exists fault according to localization of fault matrix F:
If i-th of localization of fault matrix F element
=1, then judge that i-th feed line segment is faulted line segment, otherwise i-th feed line segment is normal line segment.
The above-mentioned Distribution Network Failure localization method based on network structure matrix, the current monitoring data obtained by the route survey device being installed on each Nodes are transferred to Surveillance center by optical communication network, are realized the location of fault by Surveillance center by the present invention.
The present invention is by network topology matrix and the disposable computing of measuring column vector, get final product direct localizing faults region, there is method simple, the advantages such as speed is fast, for Timeliness coverage and excision faulty line create advantage, thus improve stability and the power supply reliability of distribution operation.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is the present invention's illustraton of model used; A, B, C in figure represent transformer station, rectangle representation node, and circled numerals is the numbering of feed line segment, and arabic numeral are the numbering of node;
Fig. 2 is non-T-type line fault verification principle;
Fig. 3 is T-type line judgment basis.
In figure neutralization literary composition, each symbol inventory is: D is power distribution network topological matrix, and G is for measuring column vector, and F is localization of fault matrix, and m is feed line segment sum, and n is node total number,
for primary fault positional matrix.
Embodiment
Ultimate principle of the present invention is: if a certain node has fault current to flow through, along this direction of current, if the next node be adjacent or anyon node have the fault overcurrent of equidirectional to flow through, then with this node feeder line that is input end not in fault zone; Otherwise in fault zone.
Fig. 2 has reacted the situation of area fault section monitoring terminal of handing in hand when fault occurs visually.In this figure, A represents transformer station's (power supply), and A-1, A-2, A-3, A-4, A-5, B-3-2, D-4 are node serial number, is also the numbering of monitor terminal; Broken lined arrows representing fault section, broad arrow represents the situation (dark colour for there being overcurrent, light colour be without overcurrent) of current indication monitoring nodes terminal.In fig. 2, A-4 monitoring equipment monitors overcurrent, and A-5 monitoring equipment does not detect overcurrent.
Fig. 3 reflects how to judge that T-type line is as faulty section.In figure, B represents transformer station, B-1, B-2, B-3, B-4, B-5, B-3-1, B-3-2, C-5 representation node, and broad arrow represents the state (dark colour for there being overcurrent, light colour be without overcurrent) of monitoring terminal monitoring corresponding to present node.If B-3 overcurrent, B-4 and B-3-1 be overcurrent not, then current T-type line section is faulty section.Broken lined arrows representing fault section.
The present invention is also according to above-mentioned principle design, when utilizing this method to position Distribution Network Failure, first node location in the line to be installed by route survey device (FTU/DTU/ high-precision failure indicator etc.), distributed monitoring center is installed in electric substation, by Networks of Fiber Communications transmission of information between measurement mechanism and Surveillance center.The main detection line of the route survey device whether data such as overcurrent, current/voltage, and be transferred to Surveillance center; Surveillance center, by resolving these data, obtains calculation matrix (measurement column vector), then positions computing, obtain faulty section information, carries out the alarm of being correlated with and control operation further.
Location main process is as follows: by being numbered node and the feed line segment be connected between node, obtains network topology matrix; Distributed monitoring center parses packet, obtains calculation matrix; Then two matrix step-by-steps are multiplied, obtain primary fault positional matrix, converting primary fault positional matrix to localization of fault matrix; Finally judge whether power distribution network exists fault according to localization of fault matrix.
Below for the feeder line shown in Fig. 1, analyze how to judge whether power distribution network exists short trouble:
The first step, generating network topological matrix:
Isolating switch, on-load switch or All other routes monitoring device and feed line segment are numbered respectively, isolating switch (on-load switch or All other routes monitoring device) can be considered node, and be numbered arabic numeral, feed line segment is branch road, is numbered the numeral of zone circle.Number order and device location have nothing to do, can arbitrary number.Can not arrange positive dirction in single supply feeding network, when also can specify normally to run, power transmission direction is positive dirction.Positive dirction generating network topological matrix D according to numbering result and regulation:
，
The row of matrix D represents the annexation of certain feed line segment and each node, and the annexation of certain node and each feed line segment is shown in list.The first row of such as matrix D, represent that 1. feed line segment is connected with node 7 with node 1,1. positive flows into feed line segment from node 1,1. flows into node 7 from feed line segment.
Second step, generates and measures column vector
:
Distributed monitoring center is resolved packet, assuming that node i has fault overcurrent, if the direction of excess current is consistent with the positive dirction of supposition, measures i-th element of column vector G
==1; If the positive dirction of the direction of excess current and supposition is contrary, then
==-1; If there is no excess current, then
==0.If node 1 and 7 monitors overcurrent, then its calculation matrix is: G=[1 00000100 0]
t;
3rd step, carries out step-by-step with column vector G respectively by each row of matrix D and is multiplied, and obtains following primary fault positional matrix
(except 1. 2. except section, all the other sections are 0 entirely):
；
4th step, by primary fault positional matrix
each row element be transformed into an element, obtain localization of fault matrix F:
According to operation rule: if primary fault positional matrix
the i-th row element only have-1 or 0, then i-th element of localization of fault matrix F
=-1; If primary fault positional matrix
the i-th row element only have 1 or 0, then i-th element of localization of fault matrix F
=1; If primary fault positional matrix
the i-th row element both do not only had 0 or have 1 and-1 simultaneously, then
=0; Localization of fault matrix F can be obtained:
F=[-1 1 0 0 0 0 0 0]
T
According to localization of fault matrix F, 5th step, judges whether power distribution network exists short trouble:
Localization of fault rule: if i-th of localization of fault matrix F element
=1, then judge that i-th feed line segment is faulted line segment, otherwise i-th feed line segment is normal line segment.
Because the element of second in matrix F is 1, therefore can judge that faulty section is as 2. section, thus realize the location of fault.Can obtain the switching information of faulty section according to topological matrix and localization of fault matrix F, Surveillance center according to these data distributing control commands, thus can realize fault isolation.
The same short trouble of deterministic process of low current grounding, uniquely measuring column vector unlike it is that whether overcurrent is formed according to the zero-sequence current of Nodes.
Claims (3)
1., based on a Distribution Network Failure localization method for network structure matrix, it is characterized in that, described method first according to the distribution net work structure in locating area, the power distribution network topological matrix D of reaction of formation feed line segment and each node annexation; Again according to the current monitoring data that the route survey device corresponding with each node obtains, generate and measure column vector G, then each row element of power distribution network topological matrix D is carried out step-by-step with the element measuring column vector G to be respectively multiplied, obtain localization of fault matrix F according to multiplied result, finally judge whether each feed line segment exists short circuit or earth fault according to localization of fault matrix F.
2. the Distribution Network Failure localization method based on network structure matrix according to claim 1, is characterized in that, said method comprising the steps of:
A. isolating switch (on-load switch or All other routes monitoring device) is considered as node; feed line segment is considered as branch road; node in protection zone and feed line segment are numbered respectively; and specify the positive dirction of power delivery, then according to the positive dirction generating network topological matrix D of numbering result and power delivery:
，
Wherein, m is feed line segment sum, and n is node total number,
represent the syntople of i-th feed line segment and a jth node, its numerical value is determined as follows:
If i-th feed line segment is connected with a jth node, and positive flows into i-th feed line segment from a jth node, then
=1; If i-th feed line segment is connected with a jth node, and positive flows into a jth node from i-th feed line segment, then
=-1; If i-th feed line segment is not connected with a jth node, then
=0;
B. utilize route survey device to monitor the electric current flowing through each node, measure column vector according to the current monitoring data genaration obtained
:
，
The numerical value of its element is determined as follows: if i-th node has fault overcurrent or electric current to be more than or equal to setting valve and the direction of excess current is consistent with the positive dirction of supposition, then measure i-th element of column vector G
=1; If i-th node has fault overcurrent and the positive dirction of the direction of excess current and supposition is contrary, then
=-1; If i-th node does not have excess current or electric current to be less than setting valve, then
=0;
C. each row of matrix D is carried out step-by-step with column vector G to be respectively multiplied, obtain primary fault positional matrix
:
；
D. by primary fault positional matrix
each row element be transformed into an element, obtain localization of fault matrix F:
Transformation rule is: if primary fault positional matrix
the i-th row element only have-1 or 0, then i-th element of localization of fault matrix F
=-1; If primary fault positional matrix
the i-th row element only have 1 or 0, then i-th element of localization of fault matrix F
=1; If primary fault positional matrix
the i-th row element both do not only had 0 or have 1 and-1 simultaneously, then
=0;
E. judge whether power distribution network exists short trouble according to localization of fault matrix F:
If i-th of localization of fault matrix F element
=1, then judge that i-th feed line segment is faulted line segment, otherwise i-th feed line segment is normal line segment.
3. the Distribution Network Failure localization method based on network structure matrix according to claim 1 and 2, it is characterized in that, the current monitoring data that the route survey device being installed on each Nodes obtains are transferred to distributed monitoring center by Networks of Fiber Communications, are realized the location of fault by Surveillance center by this method.
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105279710A (en) * | 2015-11-18 | 2016-01-27 | 许继集团有限公司 | Regional power grid data exception identification method and system |
| CN105429301A (en) * | 2015-12-17 | 2016-03-23 | 南京因泰莱电器股份有限公司 | Node analysis method-based self-healing control method for intelligent power distribution network |
| CN105548801A (en) * | 2015-12-02 | 2016-05-04 | 南京四方亿能电力自动化有限公司 | Fault location method suitable for closed-loop operation of distribution network |
| CN106443360A (en) * | 2016-11-11 | 2017-02-22 | 国网新疆电力公司巴州供电公司 | Incidence matrix-based distribution network traveling wave fault localization method |
| CN107037322A (en) * | 2017-04-14 | 2017-08-11 | 积成电子股份有限公司 | Power distribution network low current grounding localization method based on steady state characteristic |
| CN107870287A (en) * | 2017-11-08 | 2018-04-03 | 云南电力试验研究院(集团)有限公司 | A kind of localization method of distribution network failure |
| CN107909197A (en) * | 2017-11-13 | 2018-04-13 | 国网福建省电力有限公司 | A kind of big branch method of operation statistical analysis technique based on feeder line tree |
| CN109298288A (en) * | 2018-11-29 | 2019-02-01 | 中国矿业大学 | The distribution network failure section accurate positioning method of wide area zero-sequence current distributed intelligence |
| CN110058123A (en) * | 2019-04-19 | 2019-07-26 | 国家电网有限公司 | A kind of electric power networks data safety management system |
| CN110609205A (en) * | 2019-08-15 | 2019-12-24 | 国网江苏省电力有限公司南京供电分公司 | Power distribution network fault positioning method based on comprehensive information matrix |
| CN111060781A (en) * | 2019-12-31 | 2020-04-24 | 四川大学 | Method and system for positioning power distribution network fault |
| CN111289839A (en) * | 2020-03-11 | 2020-06-16 | 国网河北省电力有限公司电力科学研究院 | Distribution network single-phase earth fault section positioning method |
| CN111766475A (en) * | 2020-07-14 | 2020-10-13 | 国网江苏省电力有限公司泗洪县供电分公司 | Disconnection fault positioning matrix algorithm |
| CN111781461A (en) * | 2020-06-01 | 2020-10-16 | 云南电网有限责任公司临沧供电局 | Ground fault line selection and section determination method for small-current grounding power system |
| CN112766639A (en) * | 2020-12-28 | 2021-05-07 | 上海电力大学 | Distribution network multi-fault first-aid repair task rapid distribution method |
| CN113219298A (en) * | 2021-03-24 | 2021-08-06 | 昆明理工大学 | Complex alternating current power grid fault current traveling wave numerical simulation method |
| CN113884811A (en) * | 2021-10-08 | 2022-01-04 | 邓朝尹 | Distribution network line short-circuit fault positioning method based on straight algorithm |
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| CN116316486A (en) * | 2023-05-10 | 2023-06-23 | 广东电网有限责任公司佛山供电局 | Power distribution network line protection method, system and equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6021118A (en) * | 1997-02-10 | 2000-02-01 | Lucent Techologies Inc. | Synchronization methods for distributed processing systems having replicated data |
| CN103226176A (en) * | 2013-04-15 | 2013-07-31 | 国家电网公司 | Line selection method for single-phase earth fault of power distribution network |
| CN203422438U (en) * | 2013-07-19 | 2014-02-05 | 国家电网公司 | Real-time monitoring and fault location system for overhead lines of power distribution network |
| CN103558511A (en) * | 2013-11-18 | 2014-02-05 | 国家电网公司 | Online earth fault positioning system for power distribution network |
| CN104237735A (en) * | 2013-06-19 | 2014-12-24 | 国家电网公司 | Modeling and fault analysis method combining fault indicator and power distribution terminal |
| CN104483601A (en) * | 2014-12-24 | 2015-04-01 | 广西大学 | Power distribution network fault location method based on fault indicators |
-
2015
- 2015-06-21 CN CN201510343868.6A patent/CN104914356A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6021118A (en) * | 1997-02-10 | 2000-02-01 | Lucent Techologies Inc. | Synchronization methods for distributed processing systems having replicated data |
| CN103226176A (en) * | 2013-04-15 | 2013-07-31 | 国家电网公司 | Line selection method for single-phase earth fault of power distribution network |
| CN104237735A (en) * | 2013-06-19 | 2014-12-24 | 国家电网公司 | Modeling and fault analysis method combining fault indicator and power distribution terminal |
| CN203422438U (en) * | 2013-07-19 | 2014-02-05 | 国家电网公司 | Real-time monitoring and fault location system for overhead lines of power distribution network |
| CN103558511A (en) * | 2013-11-18 | 2014-02-05 | 国家电网公司 | Online earth fault positioning system for power distribution network |
| CN104483601A (en) * | 2014-12-24 | 2015-04-01 | 广西大学 | Power distribution network fault location method based on fault indicators |
Non-Patent Citations (2)
| Title |
|---|
| 朱发国等: ""基于现场监控终端的线路故障定位优化矩阵算法"", 《电力系统自动化》 * |
| 李开文等: ""含分布式电压的环网故障定位的改进矩阵算法"", 《电力系统及其自动化学报》 * |
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| CN113884811A (en) * | 2021-10-08 | 2022-01-04 | 邓朝尹 | Distribution network line short-circuit fault positioning method based on straight algorithm |
| CN113884811B (en) * | 2021-10-08 | 2024-04-19 | 邓朝尹 | Distribution network line short-circuit fault positioning method based on straight algorithm |
| CN116316486A (en) * | 2023-05-10 | 2023-06-23 | 广东电网有限责任公司佛山供电局 | Power distribution network line protection method, system and equipment |
| CN116316486B (en) * | 2023-05-10 | 2023-09-08 | 广东电网有限责任公司佛山供电局 | Power distribution network line protection method, system and equipment |
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