Vulnerable Line Evaluation in Power Grid Considering Line Betweenness and Well-being Risk Contribution Degree

doi:10.3969/j.issn.1000-7229.2015.12.013

Abstract

Abstract:

Vulnerability assessment of transmission line is an important part of the vulnerability researches of power system. The existing methods have problems such as single point of evaluation and lack of practicality, meanwhile cannot consider the impact of weather factors. Therefore, a new assessment method of transmission line vulnerability was proposed. The weighted betweenness indicators of lines were calculated based on the weighted betweenness model. Based the well-being risk tracking model, the well-being risk contribution degree indicators were proposed with considering the component sensitivity. At the same time, combining two-state weather model, the influence of bad weather on the line vulnerability was studied. The integrative vulnerability indicator considering system network structure and running state characteristics was put forward in combination with well-being risk contribution degree and line betweennes, and the process of vulnerability assessment for transmission line was presented. Finally, the rationality and practicability of the proposed method were demonstrated by the evaluation of the vulnerable lines of IEEE-RTS system. The proposed method can identify the vulnerable line in the critical transmission line channel of power grid, which can provide a reference for the operation and maintenance of power system.

Key words: vulnerable line, complex network, line betweenness, well-being risk contribution degree, integrative vulnerability

CLC Number:

TM 721

XIONG Shiwang, GUO Chuangxin, HE Yubin, WANG Wei, XIE Yuzhe. Vulnerable Line Evaluation in Power Grid Considering Line Betweenness and Well-being Risk Contribution Degree[J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(12): 84-90.

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