Method for selecting schemes for power restoration of active power distribution network based on improved genetic algorithm

Abstract

The invention relates to a method for selecting schemes for power restoration of an active power distribution network based on the improved genetic algorithm. According to the method, interconnection switches and various DG resources are overall considered, and a comprehensive decision is made on power restoration of the active power distribution network; DG equivalence is carried out on standby interconnection circuits in the decision making process, true DGs integrated into the power distribution network are classified, the DGs, under VF control, with the frequency and voltage regulation capacity are designed as main power supplies, and the randomly-uncontrollable power supplies are designed as common DGs; then generalized islanding and power restoration of the power distribution network are researched based on the isolated island operation mode where master-slave control is adopted. In the processing of solving the issue through the genetic algorithm, gene coding is fully combined with physical characteristics of the active power distribution network, so that the solution space needing to be searched for is greatly reduced; besides, a non-feasible solution will not be produced in the intersection and mutation operation on the basis, so that the computation speed is effectively increased, and the demand for real-time power restoration is completely met.

Description

Technical field [0001] The invention relates to a power supply restoration technology, in particular to a method for selecting an active power distribution network power supply restoration scheme based on an improved genetic algorithm. Background technique [0002] The restoration of power supply after a power distribution network failure is the core function of the smart power distribution network and an important guarantee for the self-healing of the power distribution network. It is of great significance to meet the power supply needs of users and improve the reliability of power supply. After Distributed Generation (DG) is integrated into the distribution network, how to make full use of the power generation capacity of DG to quickly and maximize the restoration of load power supply has important research significance. [0003] The traditional power supply restoration of the distribution network is based on the redundant design of the distribution network, and the use of spare ...

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Problems solved by technology

[0005] The present invention aims at the problem that it is difficult to meet the requirement of rapid restoration of power supply in the current power distribution network restoration decision, and proposes a method for selecting the power supply restoration scheme of the active distribution network based on the improved genetic algorithm, taking into account the tie switch and Various DG resources make a comprehensive decision on the power supply restoration of the active distribution network. During the decision-making process, the DG equivalent of the backup contact line is carried out, and the real DG integrated in the distribution network is classified and processed, which will have The frequency and voltage adjustment capability adopts the VF control method to define the DG as the main power supply, and defines the random uncontrollable power supply as the ordinary DG, and then based on the island operation mode of the master-slave control, the generalized island division and power supply recovery of the distribution network are carried out. Research has effectively improved the time to restore power supply to meet the needs of real-time power restoration decision-making

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