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Distribution network fault recovery method based on A* algorithm and fireworks algorithm

A technology of distribution network fault and fireworks algorithm, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as poor calculation efficiency, long calculation time, and difficulty in ensuring recovery effects.

Inactive Publication Date: 2018-02-02
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mathematical programming methods generally require approximation and simplification during the solution process. Severe dimensionality disaster will lead to long calculation time, which is difficult to meet the requirements of rapid fault recovery. Heuristic methods have attracted wide attention in the industry because of their rapidity, but their The traversal search process depends on the order of node numbers, and the programming logic is complex and it is difficult to guarantee the recovery effect; the artificial intelligence optimization method represented by genetic algorithm may generate a large number of infeasible solutions through random search, the calculation efficiency is poor, and the time-consuming is serious and unbearable. It is still far from the requirements of real-time applications

Method used

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  • Distribution network fault recovery method based on A* algorithm and fireworks algorithm
  • Distribution network fault recovery method based on A* algorithm and fireworks algorithm
  • Distribution network fault recovery method based on A* algorithm and fireworks algorithm

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Embodiment

[0110] According to this embodiment figure 1 The flowchart operates.

[0111] The distribution network diagram used in this embodiment is as follows figure 2 shown. The distribution network has a total of 33 nodes, the active load is 3715kW, the reactive load is 2300kVar, and node 1 is a slack node, and the per unit value is used for calculation (the voltage reference value is 12.66kV, and the power reference value is 10MVA). In order to increase the scale of the system, there are switches on each branch, that is, the number of switches is equal to the number of branches, that is, the distribution network has 33 nodes, 32 branches, and 3 contact switch branches. See the appendix for basic system data and DG information.

[0112] The specific operation steps of the recovery method in this embodiment are as follows:

[0113] (1) When there is a fault near node 5, after the section switches 4-5 and 5-6 are disconnected to isolate the fault, the original data of the distribut...

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Abstract

The invention discloses a distribution network fault recovery method based on an A* algorithm and a fireworks algorithm. The method comprises the steps of (1) reading original data of a distribution network and simplifying the distribution network, (2) converting a contact switch into a virtual distribution power generation device DG and classifying the DG, (3) carrying out first stage algorithm,defining an initial node and a solution node, and using the A* algorithm to carry out power supply recovery on an important load, (4) carrying out second stage algorithm, reading distribution networkdata after first stage optimization, and using the fireworks algorithm to carry out power supply recovery on a rest load, and (5) integrating the optimal programs of the two stages, and determining afinal fault recovery program. According to the method, a staged method is adopted, a globally optimal solution is ensured, and the computing speed is fast.

Description

technical field [0001] The invention relates to the technical field of distribution automation, in particular to a distribution network fault recovery method based on the A* algorithm and the fireworks algorithm. Background technique [0002] Distribution network fault recovery means that when a fault occurs somewhere in the distribution feeder, the feeder automatically starts to quickly locate and isolate the fault, and restores power to the non-faulty area through the coordinated actions of various switches. The fault recovery of distribution network not only plays an important role in ensuring the safe and economic operation of distribution network, but also relates to the sustainable development of national economic production. [0003] With the continuous advancement of smart grid construction, it is required that the future distribution network can freely accept various distributed power sources. In recent years, distributed generation (DG) such as wind power, solar po...

Claims

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Application Information

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IPC IPC(8): H02H3/06H02H7/26H02J3/38
CPCH02H3/063H02H3/066H02H7/262H02J3/382H02J3/388
Inventor 吉兴全徐嘉斌张晶张广伟
Owner SHANDONG UNIV OF SCI & TECH
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