Islanding method for power distribution network comprising distributed generation and considering interconnection switch

A technology of distributed power generation and island division, which is used in AC network circuits, electrical components, circuit devices, etc.

Active Publication Date: 2013-03-20
STATE GRID TIANJIN ELECTRIC POWER +1
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Problems solved by technology

[0005] The purpose of the present invention is to construct a new class of graph theory problems—the graph knapsack problem, and propose a solution method for the graph knapsack problem, and based on this, propose a method for solving the island division problem of distribution network with distributed generation considering tie switches effective strategy

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  • Islanding method for power distribution network comprising distributed generation and considering interconnection switch
  • Islanding method for power distribution network comprising distributed generation and considering interconnection switch
  • Islanding method for power distribution network comprising distributed generation and considering interconnection switch

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[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0032] Assuming that the main network of the power distribution system fails, after the fault is isolated, part of the system including the distributed generation area loses power, so an island system with distributed generation as the power supply can be formed to restore the power supply of important loads in time and restore the power supply of as many loads as possible at the same time. The optimal islanding scheme should meet the following basic requirements: 1) Satisfy electrical constraints such as power balance, voltage, and equipment ampacity; 2) Prioritize power restoration for important l...

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Abstract

The invention discloses an islanding method for a power distribution network comprising distributed generation (DG) and considering an interconnection switch. The method comprises the steps of obtaining a new islanding model of a power distribution system comprising the DG based on a graph model of the power distribution system, and constructing a graph model G of the power distribution system in a power-losing area after a failure. The method provides theoretical criteria for constructing the islanding method of the power distribution network comprising the DG and considering the interconnection switch, which meets an engineering demand, a solving strategy for the islanding of the power distribution network comprising a looped network structure is proposed based on the algorithm, an engineering application scope of a islanding technique comprising the DG is expanded, the defect that the existing similar technique is not applicable to the islanding of the power distribution network comprising the interconnection switch is overcome, the application scope is wider, development requirements of an intelligent power grid structure are met, the solving algorithm of the islanding of the distribution network comprising the DG and considering the interconnection switch is low in time calculation complexity, and the practical engineering demand is satisfied.

Description

technical field [0001] The invention belongs to the field of isolated island division of distribution network containing distributed generation, and in particular relates to a method for dividing islands of distribution network containing distributed generation considering tie switches. Background technique [0002] One of the goals of smart grid construction is to realize the "barrier-free grid connection" and "plug and play" of distributed generation (DG) that utilizes various renewable energy sources to achieve energy conservation and emission reduction. A large number of DGs are generally connected to the power distribution system, and the distribution network has characteristics similar to the transmission network due to its independent power supply, such as the bidirectional nature of the power flow, system security and stability issues, and power island power supply methods. Islanding operation is also of great significance to the power distribution system with DG. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCY04S10/525Y04S10/52
Inventor 王旭东梁伟王楠时燕新王峥陈培育杜明
Owner STATE GRID TIANJIN ELECTRIC POWER
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