CN110609205A - Power distribution network fault positioning method based on comprehensive information matrix - Google Patents
Power distribution network fault positioning method based on comprehensive information matrix Download PDFInfo
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- CN110609205A CN110609205A CN201910753580.4A CN201910753580A CN110609205A CN 110609205 A CN110609205 A CN 110609205A CN 201910753580 A CN201910753580 A CN 201910753580A CN 110609205 A CN110609205 A CN 110609205A
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- 239000011159 matrix material Substances 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
Classifications
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- 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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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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 method for positioning faults of a power distribution network based on a comprehensive information matrix, which comprises the following steps: obtaining a network information matrix through network topology; obtaining a protection information matrix through protection action information sent by a fault; calculating the network information matrix and the protection information matrix to obtain a comprehensive information matrix; judging a fault section through the comprehensive information matrix; the method is simple to realize, is convenient for program realization, can accurately judge the fault section, and reduces the power failure area and the power failure time.
Description
Technical Field
The invention relates to a power distribution network fault positioning method based on a comprehensive information matrix, and belongs to the technical field of electric power.
Background
Modern power grids play an important role in national economy and people's life, the scale, capacity and coverage area of the power grids are larger and larger, the requirements of users on the quality of electric energy are higher and higher, and higher requirements are put forward on the reliability of power supply. The national power company also clearly proposes that the power supply reliability is up to 99.96%, and the improvement of the distribution automation is an important guarantee for achieving the goal. When the distribution network breaks down, the fault section cannot be quickly and accurately positioned and isolated in the prior art, and the power failure area and the power failure time are increased.
Disclosure of Invention
The invention aims to provide a power distribution network fault location method based on a comprehensive information matrix, which aims to overcome the defect that fault sections cannot be accurately located and isolated when a power distribution network fails in the prior art.
A method for positioning the fault of a power distribution network based on a comprehensive information matrix comprises the following steps:
obtaining a network information matrix through network topology;
obtaining a protection information matrix through protection action information sent by a fault;
calculating the network information matrix and the protection information matrix to obtain a comprehensive information matrix;
and judging the fault section through the comprehensive information matrix.
Preferably, the network information matrix is obtained by the following method:
taking a circuit breaker, a section switch and a tie switch on a feeder line of a power distribution network as nodes, representing a closed position by 1 and a divided position by 0, and constructing an m multiplied by m network information matrix by taking a certain power distribution network with m nodes as an example;
if a feeder connection exists between the ith node and the jth node, m isijAnd mjiThe value of the matrix element is 1, otherwise, no feeder line is connected, m is connectedijAnd mjiThe matrix when the matrix element is set to 0 is the network information matrix N.
Preferably, the protection information matrix is obtained by:
forming a protection information m multiplied by m matrix according to protection action information sent by a power distribution network terminal;
and if the terminal of the ith node switch device generates a protection action, all elements in the ith row and the ith column of the protection information matrix are set to be 0, otherwise, the elements are set to be 1, and all the other elements are set to be 0.
Preferably, the comprehensive information matrix is obtained by the following method:
multiplying the network information matrix and the protection information matrix to obtain a result matrix;
and carrying out standardization processing on the result matrix to obtain a comprehensive information matrix.
Preferably, the normalization process comprises the steps of:
if element N in the network information matrixmj，Nnj，……,NkjIs 1, and protects R in the information matrixjjWhen the value is 1, normalizing the jth row and jth column elements in the result matrix, and if the value is O in the result matrixmm，Onn，……OkkIf at least 2 are 0, all the elements in the jth row and jth column in the result matrix are set to 0, otherwise, the elements are not changed.
Preferably, the method for determining the fault section includes the steps of:
if element A in the integrated information matrixijXORAjiAnd 1, the section between the ith node and the j node on the feeder line has a fault, and the switching equipment of the ith node and the j node is disconnected when the fault is isolated.
Compared with the prior art, the invention has the following beneficial effects: the method is simple to realize through an algorithm, is convenient for program realization, and can accurately judge the fault section.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
The invention discloses a method for positioning faults of a power distribution network based on a comprehensive information matrix, which comprises the following steps:
step 1, firstly, defining a network topology network information matrix according to a network topology structure of a power distribution network, wherein the matrix represents connection information between actual network nodes;
step 2, generating a protection information matrix according to protection action information sent by a power distribution network terminal when the power distribution network fails;
step 3, combining the 2 matrixes, standardizing the multiplication result to generate a comprehensive information matrix,
and 4, judging the fault section through the comprehensive information matrix.
Specifically, the network information matrix acquisition method is that a circuit breaker, a section switch and a tie switch on a feeder line of a power distribution network are used as nodes, a closed position is represented by 1, a divided position is represented by 0, and an m × m network information matrix is constructed by assuming that a certain power distribution network has m nodes. If a feeder connection exists between the ith node and the jth node, m isijAnd mjiThe matrix elements have a value of 1, otherwise m is connected without feederijAnd mjiThe matrix element is set to 0, and this matrix is the network information matrix N.
Specifically, the method for acquiring the protection information matrix is that the protection information m × m matrix is formed according to protection action information sent by the terminal of the power distribution network, for example, when the terminal of the ith node switch device performs a protection action, all elements in the ith row and the ith column of the protection information matrix are set to 0, otherwise, the elements are set to 1, and all the other elements are set to 0.
Specifically, the method for acquiring the comprehensive information matrix includes multiplying the network information matrix N by the protection information matrix R to obtain a result matrix O, normalizing the result matrix O to obtain the comprehensive information matrix a, and normalizing the result matrix O as follows if the element N in the matrix N is the same as the element N in the network information matrix Nmj，Nnj，……,NkjIs 1, and R in the matrix RjjWhen the value is 1, the element in jth row and jth column in the result matrix needs to be normalized, if O in the matrix O ismm，Onn，……OkkIf at least 2 are 0, all the elements in the jth row and jth column in the matrix O are set to 0, otherwise, the elements are not changed.
Specifically, the fault section determination method includes that the comprehensive information matrix A reflects a fault section, and if an element A in the matrix A is presentijXORAjiAnd 1, the section between the ith node and the j node on the feeder line has a fault, and the switching devices of the ith node and the j node are disconnected when the fault is isolated.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A method for positioning the fault of a power distribution network based on a comprehensive information matrix is characterized by comprising the following steps:
obtaining a network information matrix through network topology;
obtaining a protection information matrix through protection action information sent by a fault;
calculating the network information matrix and the protection information matrix to obtain a comprehensive information matrix;
and judging the fault section through the comprehensive information matrix.
2. The method for power distribution network fault location based on integrated information matrix according to claim 1, wherein the network information matrix is obtained by:
taking a circuit breaker, a section switch and a tie switch on a feeder line of a power distribution network as nodes, representing a closed position by 1 and a divided position by 0, and constructing an m multiplied by m network information matrix by taking a certain power distribution network with m nodes as an example;
if a feeder connection exists between the ith node and the jth node, m isijAnd mjiThe value of the matrix element is 1, otherwise, no feeder line is connected, m is connectedijAnd mjiThe matrix when the matrix element is set to 0 is the network information matrix N.
3. The method for power distribution network fault location based on the integrated information matrix according to claim 1, wherein the protection information matrix is obtained by:
forming a protection information m multiplied by m matrix according to protection action information sent by a power distribution network terminal;
if the terminal of the ith node switch device is protected, all the elements in the ith row and the ith column of the protection information matrix are set to be 0, otherwise, the ith row and the ith column of the protection information matrix are set to be 1, and all the other elements are set to be 0, so that the protection information matrix is formed.
4. The method for power distribution network fault location based on the integrated information matrix according to claim 1, wherein the integrated information matrix is obtained by the following method:
multiplying the network information matrix and the protection information matrix to obtain a result matrix;
and carrying out standardization processing on the result matrix to obtain a comprehensive information matrix.
5. The method for power distribution network fault location based on integrated information matrix of claim 4, wherein the standardization process comprises the following steps:
if element N in the network information matrixmj，Nnj，……,NkjIs 1, and protects R in the information matrixjjWhen the value is 1, normalizing the jth row and jth column elements in the result matrix, and if the value is O in the result matrixmm，Onn，……OkkIf at least 2 are 0, all the elements in the jth row and jth column in the result matrix are set to 0, otherwise, the elements are not changed.
6. The method for power distribution network fault location based on the comprehensive information matrix as claimed in claim 1, wherein the fault section judgment method comprises the following steps:
if element A in the integrated information matrixijXORAjiAnd 1, the section between the ith node and the j node on the feeder line has a fault, and the switching equipment of the ith node and the j node is disconnected when the fault is isolated.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN103558512A (en) * | 2013-11-19 | 2014-02-05 | 湖南大学 | Method for locating power distribution network 10kV feeder line fault based on matrix operation |
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2019
- 2019-08-15 CN CN201910753580.4A patent/CN110609205A/en active Pending
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| CN103558512A (en) * | 2013-11-19 | 2014-02-05 | 湖南大学 | Method for locating power distribution network 10kV feeder line fault based on matrix operation |
| CN104914356A (en) * | 2015-06-21 | 2015-09-16 | 国家电网公司 | Distribution network fault positioning method based on network structure matrix |
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