Blocking and hierarchical structure based power distribution system reliability evaluation method

Abstract

The invention provides a blocking and hierarchical structure based power distribution system reliability evaluation method which comprises the following steps; establishing a reachable matrix according to a power distribution system, dividing a manual block and an automatic block according to the reachable matrix, establishing a manual block hierarchical structure and an automatic block hierarchical structure according to the manual block and the automatic block, and performing reliability analysis according to the manual block hierarchical structure and the automatic block hierarchical structure. According to the method, basic analysis units of the system are reconstructed according to blocking theory, the establishment of a fault-mode consequence list is avoided according to the minimum path theory, repeated calculation on the reliability of identical routes is avoided according to the hierarchical structures, high analysis efficiency is obtained, and the problems that the power distribution grid reliability analysis is large in calculation amount, slow in speed and low in accuracy rate are solved.

Description

technical field [0001] The invention relates to a method in the field of power distribution system reliability assessment, in particular to a power distribution system reliability assessment method based on a block and hierarchical structure. Background technique [0002] Power system reliability assessment began in the late 1960s. Initially, it mainly focused on the power generation and transmission system, because the configuration of power generation and transmission equipment is relatively concentrated, the one-time investment is large, the construction period is long, and equipment failure or outage will bring serious and extensive negative effects to society and the environment. However, in fact, the power distribution system, which is the terminal link of the power system to supply power to users, has the greatest impact on the power supply performance of users, because relevant investigations show that about 80% of the power outage events of users are caused by the f...

AI Technical Summary

Problems solved by technology

The simulation method and the use of fuzzy mathematics are mostly used in qualitative analysis, and the calculation speed is fast but not accurate enough

The consequence analysis method based on failure mode in the analytical method is currently the most important method for reliability analysis of distribution network. Although the analysis result is relatively accurate, it is only applicable to radiation distribution network, and the calculation speed is slow when the calculation amount is large.

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