Establishment and Assessment of Power Grid Vulnerability Comprehensive Index

doi:10.3969/j.issn.1000-7229.2015.08.015

Abstract

Abstract:

To assess the impact of node-fault on the static performance of power grid, this paper proposed the vulnerability comprehensive index for power grid based on the complex network theory. This paper constructed the structural vulnerability index consisting of the largest connected subset and the average efficiency of the network, as well as the functional vulnerability index consisting of the proportion of the loss load and the grid power transmission efficiency. On this basis, this paper proposed a vulnerability comprehensive index based on the entropy value fuzzy comprehensive assessment method, which could overcome the strong subjectivity and the inconsistency with the real data when its vulnerability indexes were empowered. Finally, the numerical simulations and analyses for the attacks: random, node degree, node electrical betweenness, traditional line betweenness and line electrical betweenness, were investigated based on the IEEE-118 bus system respectively. The impacts of these five types of attacks on the grid comprehensive vulnerability index and every single index were analyzed, meanwhile, the rationality of the comprehensive index was verified.

Key words: complex network model, vulnerability comprehensive index, entropy value fuzzy comprehensive assessment method, IEEE-118

CLC Number:

TM 711

HAN Zewen, SU Yongqing, YUE Jiguang, ZHANG Kunpeng. Establishment and Assessment of Power Grid Vulnerability Comprehensive Index[J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(8): 89-94.

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