Fault positioning method and system based on distribution network partitioning equivalence

A fault location and distribution network technology, applied in the direction of fault location, system integration technology, information technology support system, etc., can solve the problems that affect the positioning efficiency and large calculation scale, and achieve the effect of improving positioning efficiency and reducing calculation scale

Active Publication Date: 2019-08-16
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The inventors found that the power system fault component location algorithm based on cluster analysis is zoning for voltage and reactive power control of large power grids, and does not

Method used

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  • Fault positioning method and system based on distribution network partitioning equivalence
  • Fault positioning method and system based on distribution network partitioning equivalence
  • Fault positioning method and system based on distribution network partitioning equivalence

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] figure 1 It is a flowchart of a fault location method based on the equivalence of distribution network partitions in an embodiment of the present disclosure.

[0038] Such as figure 1 As shown, a fault location method based on distribution network partition equivalence in this embodiment includes:

[0039] S101: Use the topological sorting method to determine the longest path of the distribution network, and divide the distribution network into several sub-regions under the condition that the configuration requirements and scale requirements of the district PMU are met.

[0040] In specific implementation, the longest path of the network is selected by the topology sorting method, and each node of the longest path is weighted according to the number of nodes contained in the branch line; then, the micro PMU configuration requirements and system scale requirements in the subarea are met, based on the longest path weight vector Zoning of the distribution grid.

[0041] Applied to...

Embodiment 2

[0124] Such as Picture 10 As shown, this embodiment provides a fault location system based on distribution network partition equivalence, including:

[0125] (1) Sub-area division module, which is used to determine the longest path of the distribution network by using the topological sorting method, and divide the distribution network into several sub-areas when meeting the requirements of the district PMU configuration and scale;

[0126] Specifically, in the sub-region division module, weights are assigned to the nodes of the longest path according to the number of nodes included in the branch line, and the distribution network partitioning scheme is determined based on the longest path node weight vector and the partition PMU configuration requirements and scale requirements.

[0127] The micro PMU configuration requirements for each partition are:

[0128] At least 2 mini PMU synchronous measurement devices are required in each zone;

[0129] The scale requirements of each zone are...

Embodiment 3

[0138] This embodiment provides a computer-readable storage medium on which a computer program is stored, characterized in that the program is executed by a processor to achieve figure 1 Shown are the steps in the fault location method based on the distribution network partition equivalent.

[0139] In this embodiment, for the large-scale distribution network, the calculation scale of the fault location algorithm is relatively large, and the fault location is based on the equivalent value of the distribution network partition. For the associated branch of the node with the smallest voltage deviation, the dichotomy is based on the fault location after the equivalent value. Search to determine the precise location of the fault point, improve the location efficiency of the fault location algorithm, and reduce the calculation scale.

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Abstract

The invention provides a fault positioning method and system based on distribution network partitioning equivalence. The fault positioning method based on a distribution network partitioning equivalence comprises the following steps that: utilizing a topological sorting method to determine the longest access of a power distribution network, and dividing the power distribution network into a plurality of sub-regions under a situation that partitioning PMU (Power Management) configuration requirements and scale requirements are met; traversing all nodes of each sub-region, selecting a voltage deviation minimum value as a fault circuit end point, judging that the sub-region to which the fault circuit end point belongs as a fault region, judging that the sub-region without the fault circuit end point as a non-fault region, and adopting equivalent impedance to carry out non-fault region equivalence; and selecting a related branch of a node with the minimum voltage deviation, and carrying out method-of-bisection searching to determine the accurate position of the fault point. By use of the method, a search range is reduced, and the fault positioning accuracy and efficiency of the power distribution network is improved.

Description

Technical field [0001] The present disclosure belongs to the field of distribution network fault location, and in particular relates to a fault location method and system based on distribution network partition equivalence. Background technique [0002] The statements in this section merely provide background information related to the present disclosure, and do not necessarily constitute prior art. [0003] As the structure of modern distribution network becomes more and more complex, the scale becomes larger and larger, which increases the computational burden for fault location and reduces related efficiency. If the processing can be divided into regions, the calculation difficulty can be simplified, the calculation scale can be reduced, and the calculation efficiency can be improved. [0004] The existing algorithms used in grid division are mainly clustering algorithms, and most of them are divisions for voltage and reactive power control of large power grids. Sheng Hu of Nort...

Claims

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Application Information

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IPC IPC(8): G01R31/08
CPCG01R31/086Y02E40/70Y02E60/00Y04S10/22
Inventor 贠志皓宋哲
Owner SHANDONG UNIV
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