Risk assessment method for intelligent distribution network

Abstract

The invention discloses a risk assessment method for an intelligent distribution network. A risk assessment index of an intelligent distribution network is selected, each macroscopic risk type is classified specifically, a microcosmic assessment index is determined, and a multi-level risk assessment system of the intelligent distribution network is constructed; according to different risk value zones, intelligent distribution network operation risk levels are set, and each risk level corresponds to a network security level; an expert investigation form is constructed, and risk membership degrees of all microcosmic assessment indexes are solved based on a set-value statistic expert assessment method; and on the basis of an improved evidence theory as well as combination of operating states of all microcosmic assessment indexes at all development stages of the intelligent distribution network, corresponding weight coefficients are given to the multi-level risk assessment system of the intelligent distribution network according to a non-structural triangular fuzzy number weighting method, an integrated risk value of the intelligent distribution network is obtained based on level-by-level weighted average, and a network risk level and a security level are determined. Therefore, the intelligent development level and the main risk factor of the intelligent distribution network can be assessed reasonably and accurately.

Description

technical field [0001] The invention relates to a risk assessment method for an intelligent distribution network. Background technique [0002] In recent years, the research and construction of smart grid has become the focus of attention of countries all over the world. my country's State Grid Corporation of China and relevant scholars have closely tracked changes in the international situation. On the basis of learning from European and American smart grids, and according to my country's basic national conditions, they have proposed the construction of a unified strong smart grid that is strong, reliable, economical, efficient, clean and environmentally friendly, transparent, open, and friendly. development strategy. [0003] Risk assessment of smart grid is of great significance for identifying weak links and main risk factors in the process of network development, and realizing optimal operation of the network. At present, there are few studies on smart grid risk assess...

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Problems solved by technology

At present, there are few studies on smart grid risk assessment. Although the existing literature has proposed the overall idea and overall framework of smart grid risk assessment, there are network risk factors that are too simple and rough, and the main risk factors are not fully considered. Insufficient research on the risk assessment method of smart grid, so that the effect of network risk assessment is not ideal

[0004] As one of the key links of the smart grid, the smart distribution network is an important guarantee for the realization of the overall construction goal of the smart grid, but there are few studies on the risk assessment of the smart distribution network.

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