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Island dividing method for power distribution network having distributed power sources

A distributed power supply and island division technology, which is applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve problems such as distribution network island division, and achieve the effect of avoiding equipment overload and voltage exceeding the limit

Active Publication Date: 2015-11-25
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the object of the present invention is to provide an island division method for a distribution network with distributed power sources. The present invention solves the island division of the distribution network by combining the minimum spanning tree algorithm and the improved genetic algorithm. question

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  • Island dividing method for power distribution network having distributed power sources
  • Island dividing method for power distribution network having distributed power sources
  • Island dividing method for power distribution network having distributed power sources

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Embodiment Construction

[0096] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0097] After the distribution network fails, the island operation mode of DG has a positive effect on the power supply recovery of the distribution network. The invention establishes an island division problem model with distributed power distribution network, and adopts the combination of the minimum spanning tree algorithm and the improved genetic algorithm The method solves the islanding problem of distribution network. According to the characteristics of the distribution network, the distribution network model is simplified, combined with the complex distribution network structure including the ring network structure, the load between the two controllable switches is selected as the node, and the controllable switch between the connected loads is used as the node. A simplified model of the distribution network is est...

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Abstract

The invention relates to an island dividing method for a power system and an island dividing method for a power distribution network having distributed power sources. The method includes steps of (1) modeling aiming at the island dividing problem; (2) undirected graph weight setting for the power distribution network; (3) formation of a radiation power distribution network based on a minimum spanning tree algorithm; (4) island division, based on an improved genetic algorithm, for the power distribution network having the distributed power sources; (5) island division for the power distribution power network having the plurality of distributed power sources. According to the invention, island division problem of the power distribution network is solved by the combination of the minimum spanning tree algorithm and the improved genetic algorithm. The power distribution network model is simplified based on features of the power distribution network. The power distribution network with a looped network structure is simplified to a radiation power distribution network with the optimal load restoration sequence and then the optical island is obtained by adopting the improved genetic algorithm. The searching efficiency is improved and the optimal solution can be obtained quickly and effectively. The method provided by the invention has good practicability.

Description

technical field [0001] The invention relates to an island division method of a power system, in particular to an island division method of a distribution network containing distributed power sources. Background technique [0002] Planning islands has the potential to be an ideal way to take full advantage of distributed power generation after distribution system failures in the future. At present, the islanding methods of distribution networks with distributed power generation are studied, and these methods can be divided into two types: offline islanding and online islanding. Offline island division refers to the use of traditional decoupling methods, generally based on offline calculations, to determine the decoupling point, and the decoupling device judges based on local information to determine whether to operate decoupling, so that unplanned islands can be transformed into planned islands. . At present, almost all power systems in the actual power grid adopt this meth...

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Application Information

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IPC IPC(8): H02J3/00G06F19/00
Inventor 冯雪平宋晓辉梁英孟晓丽贾东梨胡丽娟仉天舒李雅洁张瑜何开元张琳赵珊珊常松陈晓毅
Owner STATE GRID CORP OF CHINA
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