Reliability evaluation method of active power distribution network with distributed power supply based on TOPSIS method

Abstract

The invention relates to a reliability evaluation method of an active power distribution network with a distributed power supply based on a TOPSIS method. The reliability evaluation method comprises astep of giving an initial network structure, a step of carrying out Monte-Carlo simulation hourly and analyzing a network according to a network structure obtained by the Monte-Carlo simulation, a step of judging the number of network cracking, carrying out flow calculation on the network according to the type of a cracked network and then adjusting according to a flow imbalance adjustment strategy, a step of counting and calculating reliability indexes according to the result of the flow calculation, a step of obtaining a specification decision matrix by using a vector normalization method,a step of constructing matrix A of results of the pairwise comparison of the reliability indexes, a step of checking the consistency of the matrix A, a step of obtaining an eigenvector W correspondingto a largest eigenvalue lambda max of the matrix A, wherein W=[omega1, omega2 ... to omega7]T, a step of constructing a weighted normative matrix X={xij}, wherein xij=omegaj*zij, i=1 to m, j=1 to 7,a step of calculating an ideal solution x[j]<*> and a negative ideal solution x[j] <0>, a step of calculating Euclidean distances of each scheme to the ideal solution and the negative ideal solution,and a step of calculating the comprehensive evaluation value of each scheme according to the formula C[i]<*>=d[i]<0> / (d[i]<0>+d[i]<*>), i=1 to m, and setting a quality sequence of the schemes according to the sequence of C[i]<*> from large to small.

Description

technical field [0001] The invention relates to the field of distribution network reliability analysis, in particular to a method for evaluating the reliability of an active distribution network containing distributed power sources based on the TOPSIS method. Background technique [0002] In order to cope with the massive access of DG units, the C6.11 project team of the Distribution and Distributed Generation Special Committee (C6) of the 2008 International Conference on Large Power Grids (CIGRE) proposed the concept of active distribution network, that is, it can comprehensively control distributed power generation. The distribution network of distributed energy (DG, flexible load, and energy storage) can use flexible network technology to achieve effective management of power flow. Distributed energy assumes a certain supporting role for the system on the basis of its reasonable regulatory environment and access criteria. . Active distribution network is a utilization mo...

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Problems solved by technology

However, the above-mentioned literature on the reliability evaluation of active distribution networks either selects a single reliability index for evaluation, or simply lists several distribution network reliability indexes, and lacks a systematic comprehensive evaluation of active distribution networks.

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