Switch grouping method of network reconstruction of power distribution network

A technology of network reconstruction and switch grouping, applied in the field of power system, can solve the problems of slow calculation speed and large amount of calculation, and achieve the effect of accurate results, guaranteed validity and strong practicability

Active Publication Date: 2015-07-08
STATE GRID CORP OF CHINA +1
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  • Abstract
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Problems solved by technology

[0005] The existing distribution network reconstruction is based on the combined scheme of all operable switches, establishes the objective function, considers the constraints, and uses mathematical optimization, artificial intelligence and other algorithms to solve the optimal scheme, which requires a large amount of calculation and slow calculation speed

Method used

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  • Switch grouping method of network reconstruction of power distribution network

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Experimental program
Comparison scheme
Effect test

Embodiment

[0047] 1. Close all contact switches in the distribution network.

[0048] 2. Analyze all the basic circuits in the distribution network.

[0049] 1) According to the network topology structure of the distribution network, the network topology analysis is carried out to form a calculation model.

[0050] 2) All parallel branches are equivalent to equivalent branches, and the calculation model is updated to form a node-branch association matrix A.

[0051] 3) Judging the number of columns in A, if it is less than 3, it means that the number of branches in the network is less than 3, and cannot form a loop, and exit the algorithm process.

[0052] 4) Determine whether there is a single-ended branch in A, and if so, delete all the single-ended branches in A to obtain a new node-branch association matrix A, go to 3).

[0053] 5) Judging whether there are multi-branch nodes in A, if not, then A matrix is ​​a single-loop correlation matrix, and the branches of all columns in A for...

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Abstract

The invention relates to a switch grouping method of network reconstruction of a power distribution network. The method comprises I) closing interconnection switches in the power distribution network; II) analyzing basic loops in the power distribution network; and III) grouping operable switches in the basic loops into one group. According to the provided switch grouping method of network reconstruction of the power distribution network, the theoretical foundation is strict, the calculation amount is relatively small and the calculating speed is fast; through combinations of switches in different switch groups, all feasible schemes for the network reconstruction are obtained, so that a large amount of ineffective calculation for the large-scale network reconstruction of the power distribution network is prevented and the calculating speed is improved.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to a switch grouping method for distribution network reconfiguration. Background technique [0002] In recent years, distribution automation has developed rapidly. In order to improve the safety and economy of distribution system operation, the common analysis techniques for analysis and decision-making of distribution network are: [0003] 1) Network reconstruction. Distribution network reconfiguration refers to determining which tie switches need to be closed and which section switches need to be opened, so as to change the topology of the network to affect the power flow in the network and achieve the purpose of network optimization. Its goal can be a combination of one or more goals such as minimizing system active power loss, minimizing system energy loss, balancing system load, improving system reliability, and improving system voltage stability. [0004] 2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00G06F19/00
Inventor 王少芳刘广一郎燕生李强徐杰
Owner STATE GRID CORP OF CHINA
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