Integrated Assessment Index of Power Grid’s Weak Links by Considering Coherent Value at Risk

doi:10.11930/j.issn.1004-9649.2017.06.062.07

Abstract

Abstract: The weak links of power grid directly influence the safe operation of power system. In order to identify the weak links, the paper proposes the index of coherent value at risk(CVaR), whose reliability has been proved by the simulation results of IEEE 39-bus system. Furthermore, The CVaR is compared with the commonly used self-organized criticality and effect risk entropy. Based on the comparison results, the fuzzy evaluation matrix is established through the standardization index. Meanwhile, an integrated assessment index is obtained by use of the objective entropy method and improved analytical hierarchy process. Finally, the integrated assessment index is applied to analysis of the Hunan power grid’s weak links. The results show that the integrated assessment index can clearly locate the weak links of power grid, and the assessment result can provide an instruction for planning power networks and a reference for formulating preventive measures.

Key words: weak links, coherent value at risk, self-organized criticality, effect risk entropy, objective entropy method, improved analytical hierarchy process

CLC Number:

TM711

LUAN Xiang, YU Qun, HE Qing, CAO Na, YI Jun. Integrated Assessment Index of Power Grid’s Weak Links by Considering Coherent Value at Risk[J]. Electric Power, 2017, 50(6): 62-68.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2017.06.062.07

https://www.electricpower.com.cn/EN/Y2017/V50/I6/62

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