Active distribution network reliability assessment method

Abstract

The present invention discloses an active distribution network reliability assessment method. Based on the improved new sequential Monte Carlo simulation method, the regional division method is used to carry out active distribution network reliability assessment, and in order to improve the efficiency and accuracy of the analysis, the present invention innovatively proposes to use the power circleto divide the islands and to analyze and calculate the islands; in the reliability assessment process, the importance of the load is fully considered, and by taking the maximal equivalent load contained in the islands as an objective, continuity of power supply for important loads can be fully guaranteed; and the randomness and active coordination of the distributed energy output power in the active distribution network are fully considered, whether the active distribution network needs to be reconstructed is determined, and according to the reconstructed network structure, the current reliability index of each load point is corrected, so that the efficiency and accuracy of the active distribution network reliability assessment can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of active distribution networks and relates to a reliability evaluation method for active distribution networks. Background technique [0002] As a key link in the power system, the distribution network plays an important role in controlling and ensuring the quality of power supply for users. With the penetration of various distributed generation (Distributed Generation, DG) (distributed power generation, distributed energy storage, controllable load), the current load growth is slow, the development space resources of distribution network are limited, and the network scale is difficult to expand And other issues. In response to these increasingly prominent problems, the concept of active distribution network came into being. The active distribution network manages the power flow by using a flexible network topology for active control and active management of local distributed energy distribution systems. ...

AI Technical Summary

Problems solved by technology

[0004] The literature "Reliability Assessment of Distribution Network Containing Microgrid Based on Monte Carlo Simulation" [Liang Huishi, Cheng Lin, Liu Sige. Power Grid Technology. 2011.10.032] uses sequential Monte Carlo performance assessment, but the simulation time method is too complicated and lengthy, and the efficiency and accuracy of large-scale power grid assessment will be greatly reduced

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