Reliability Assessment Of Active Distribution Networks Considering Renewable Generation And Islanding Operations

With the intensification of the energy crisis,Distributed power technology has gradually gained attention from various countries,and distributed power will change the original reliability evaluation mechanism of the distribution network.Therefore,the content of this paper can provide a theory for the development of the future distribution network basis.The research content and results of this article are as follows:(1)This paper describes the research background of active distribution network with distributed power supply and isolated island,the development of reliability analysis of distribution network is analyzed,Moreover,It combs the dependence relationship between the sections of this article.(2)The theoretical basis of reliability evaluation of traditional distribution network is expounded,Reliability modeling for distribution network components,Markov model based on two states is adopted to deal with it.(3)Aiming at the reliability evaluation of the traditional distribution network,a Monte Carlo evaluation algorithm based on feeder zoning and network coding is proposed,this method can effectively establish failure mode effects analysis table,in order to show that method is feasible and validated using the classic test system analysis and the experimental results prove that this method can give a good indication of indicator.(4)According to the type of energy,distributed power can be divided into different types,After the distributed power is connected to the grid,the reliability of the distribution network will be affected to some extent.This paper presents an island partition algorithm based on breadth first traversal;(5)Considering an island is a kind of operation and renewable energy output active power distribution network reliability analysis method of the uncertainty is established,considering terminal equipment reliability of renewable energy power generation state model,the concept of using the feeder partition divided island for the specific scope of operation,and finally,A sequential Monte Carlo simulation algorithm based on feeder partition is proposed,Three typical scenarios are validated by IEEE RBTS test system.