Multi-target network reestablishing method for active power distribution network

Abstract

The invention relates to a power distribution network reestablishing method, in particular to a multi-target network reestablishing method for an active power distribution network. On the basis of a new requirement of the active power distribution network for network reestablishing, a new hybrid evolutionary algorithm is put forward to be used for reestablishing the power distribution network, an initial network close to the optimal solution is rapidly obtained through the optical flow pattern algorithm, then the optimal solution is found through a tree-shaped structure coding monolepsis algorithm, the tree-shaped structure coding is conducted on the initial network, and solving is conducted through the monolepsis algorithm. The method has the advantages that when network reestablishing is conducted on the active power distribution network, the influences of distributed type power supplies are taken into full consideration, force output constraints of the distributed power supplies are contained in the constraint conditions, the influences of distributed type power supply plan islands are taken into full consideration in reliability calculation, the network loss of the power distribution network where network reestablishing is conducted is greatly reduced, the power supply reliability is improved, and meanwhile the reestablishing result better conforms to the actual situation that a lot of distributed type power supplies are connected into the active power distribution network.

Description

technical field [0001] The invention relates to a distribution network reconfiguration method, in particular to a multi-objective network reconfiguration method suitable for an active distribution network. Background technique [0002] With the emergence and development of distributed power in the distribution network, the distribution network has changed from a passive network to an active network, and the operation of the distribution network is facing new challenges. The C6.11 working group of the International Conference on Large Power Grids (CIGRE) proposed the concept of Active Distribution Networks (ADN). The core of ADN is active management, which actively adjusts the operating state of the power grid by flexibly changing the topology structure. and control; and can effectively integrate distributed power and make full use of its positive effect on the distribution network; the line loss is significantly reduced, and the reliability of power supply is greatly improve...

AI Technical Summary

Problems solved by technology

However, the above active distribution network reconfiguration methods take the maximum power supply capacity as the basis for distribution network reconfiguration, but they do not consider the impact of a large number of distributed power sources in the active distribution network on distribution network reconfiguration

The active management of distributed power is the main feature of the active distribution network. At the same time, the bidirectional power flow caused by a large number of distributed power also brings new problems to the reconstruction of the distribution network. The impact of distributed power sources is not fully considered, which may cause large calculation errors. At the same time, the advantages of distributed power sources to improve power supply reliability and reduce network losses are not fully utilized in the network reconstruction process.

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