Power distribution network reconstruction method and system

Abstract

The invention discloses a power distribution network reconstruction method and system. The method comprises the steps that an incidence matrix model is established according to the connection relation of father nodes and son nodes in a power distribution network and branch switches, and the on-off states of the branch switches are assigned to form an incidence matrix set; all incidence matrixes are used for simulating a topological structure of the power distribution network, whether the topological structure has a looped network is judged, if the topological structure has a looped network, the incidence matrixes corresponding to the topological structures are eliminated, if the topological structure has no a looped network, the topological structure is subjected to load flow calculation, and if the topological structure does not meet load flow constraints, the incidence matrixes corresponding to the topological structure are eliminated; a target function and constraint conditions are established, the target function is solved through adoption of an improved particle swarm optimization according to the restraint conditions so as to obtain the best topological structure; the power distribution network is reconstructed according to the best topological structure. The power distribution network reconstruction method and system can reduce needed time of power distribution network reconstruction by improving the optimizing speed.

Description

【Technical field】 [0001] The invention relates to the field of power electronics automation, in particular to a distribution network reconfiguration method and system in a distribution network. 【Background technique】 [0002] The distribution network is a network in which the low-voltage side of the secondary step-down substation in the power system supplies power to users directly or after step-down. It is composed of overhead lines, power distribution stations or column-mounted step-down transformers and users. The main function of the distribution network is to receive electric energy from the transmission network, and then distribute the received electric energy through distribution transformers and lines or directly consume electric energy. With the sharp increase of power load, the scale of power distribution network is getting larger and larger. In order to adapt to the external conditions of increasingly scarce urban environmental space resources, reduce the network ...

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Problems solved by technology

[0004] Based on this, it is necessary to provide a distribution network reconfiguration method that can quickly obtain the optimal topology of the distribution network for the problem that it is difficult to quickly obtain the optimal solution for distribution network reconfiguration in the prior art

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