Fault-tolerance and distributed power supply contained power distribution network fault locating method

A distribution network fault and distributed power supply technology, applied in the field of power transmission and distribution, can solve problems that need to be improved in computing speed, and achieve the effects of improving power supply reliability, improving positioning efficiency, and fast positioning

Inactive Publication Date: 2016-04-13
ELECTRIC POWER RES INST STATE GRID JIANGXI ELECTRIC POWER CO +1
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Problems solved by technology

Indirect algorithms mainly include intelligent swarm algorithm and neural network algorithm, among which intelligent swarm algorithm mainly includes genetic algorithm, particle swarm algorithm

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  • Fault-tolerance and distributed power supply contained power distribution network fault locating method
  • Fault-tolerance and distributed power supply contained power distribution network fault locating method
  • Fault-tolerance and distributed power supply contained power distribution network fault locating method

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Embodiment Construction

[0023] The specific embodiment of the present invention is as figure 1 shown.

[0024] Based on the fault location model and sub-area processing method proposed above, the main steps of using the harmony search algorithm (referred to as HS) are as follows:

[0025] (1) Divide the power distribution network into active trees and passive branches according to the regional processing method;

[0026] (2) According to the fault current information uploaded by the FTU, the passive branches without fault current are eliminated, and the dimension of the solution is determined, that is, the number of variables. The value of each variable is 0 or 1, representing the state of the line;

[0027] (3) HS algorithm parameters are initialized, HM is initialized, and HMS solutions are randomly generated;

[0028] (4) Generate new solutions based on HS algorithm rules;

[0029] (5) According to step (1), the line fault information of the solution is converted into switch fault current infor...

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Abstract

The invention provides a fault-tolerance and distributed power supply contained power distribution network fault locating method. According to the invention, based on the fault current information uploaded by an FTU (power distribution network feed line terminal) or a fault indicator, the switch fault current information and the line state information are encoded, the line state information is converted into corresponding switch fault current information by defining the switch functions, the advantage and disadvantage degrees of each solution are evaluated by means of target functions, and the optimal solution, namely, the fault position corresponding to the information of the FTU or the fault indicator, is searched by means of a harmony search algorithm. In order to improve the fault positioning speed, the power distribution network is divided into an active branch and a passive branch, and the passive branch having no fault current is not considered during the positioning, the dimension of the solution in the algorithm is shortened, and the positioning efficiency is improved. The method is suitable for the distribution automated power distribution network.

Description

technical field [0001] The invention relates to a fault-tolerant distribution network fault location method including distributed power sources, which belongs to the technical field of power transmission and distribution. Background technique [0002] Distributed power generation is widely used because of its environmental friendliness, economy and system reliability, but its access also has a certain impact on the fault location of the distribution network. First of all, the fault current of the traditional distribution network is only provided by the main transformer power supply, which is a one-way flow, and the access of the distributed power supply makes the fault current flow bidirectionally; There is a fault current in the path of the fault point. After multiple distributed power sources are connected, each distributed power source will provide fault current to the fault point, which greatly increases the number of lines with fault current. [0003] The existing faul...

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Application Information

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IPC IPC(8): G01R31/08
CPCG01R31/086G01R31/088Y04S10/52
Inventor 刘蓓郑蜀江王华云安义蔡木良潘建兵贾蕗路李博江
Owner ELECTRIC POWER RES INST STATE GRID JIANGXI ELECTRIC POWER CO
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