浙江大学学报(工学版)  2018, Vol. 52 Issue (3): 560-568    DOI: 10.3785/j.issn.1008-973X.2018.03.019
 电气工程

1. 浙江大学 电气工程学院, 浙江 杭州 310027;
2. 广东电网有限责任公司惠州供电局, 广东 惠州 516003
Identification of vulnerable lines in power grid consideringrelative probability and consequence of line outage
SHANZheng-bo1, WANG Hui-fang1, LIN Guan-qiang2, HE Ben-teng1
1. College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;
2. Huizhou Power Supply Bureau of Guangdong Power Grid Co., Huizhou 516003, China
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Abstract:

Considering key information of power grid, such as topology, running state, distribution of power source and load, line flow limit, a new method to identify vulnerable transmission lines was proposed based on relative probability and consequence of line outage. Firstly, comprehensive load rate of unit entropy was defined to represent power grid vulnerability. Change of this index after a line outage was modified by node importance, which measured the consequence of line outage. Hypertext-Induced Topic Search (HITS) algorithm, widely used in web page rank, was modified to evaluate the node importance of power grid. Secondly, relative probability of line outage was calculated considering line failure rate and relative probability of line flow off-limit caused by random fluctuation of loads. Lastly, the specific evaluation process for identifying vulnerable transmission lines was given. Case study of IEEE 39 power system validates that the proposed method is reasonable and efficient.

 CLC: TP212

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SHANZheng-bo, WANG Hui-fang, LIN Guan-qiang, HE Ben-teng. Identification of vulnerable lines in power grid consideringrelative probability and consequence of line outage. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2018, 52(3): 560-568.

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