Lightning Strike Risk Evaluation of Power Grid with Distributed Hydropower

doi:10.3969/j.issn.1000-565X.2011.10.022

Journal of South China University of Technology (Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (10): 127-131.doi: 10.3969/j.issn.1000-565X.2011.10.022

• Power & Electrical Engineering • Previous Articles Next Articles

Lightning Strike Risk Evaluation of Power Grid with Distributed Hydropower

Zhang Yong-jun¹Huang Hui¹Liu Yang-hai²Chen Zhi-feng²

1. College of Electric Power∥Guangdong Key Laboratory of Clean Energy Technology,South China University of Technology,Guangzhou 510640,Guangdong,China; 2. Shaoguan Power Supply Bureau,China South Power Grid CO. LTD,Shaoguan 512026,Guangdong,China

Received:2010-05-27 Revised:2011-07-15 Online:2011-10-25 Published:2011-09-01
Contact: 张勇军(1973-) ，男，博士，副教授，主要从事电力系统优化规划与控制、可靠性和HVDC 研究． E-mail:zhangjun@scut.edu.cn
About author:张勇军(1973-) ，男，博士，副教授，主要从事电力系统优化规划与控制、可靠性和HVDC 研究．
Supported by:
广东省部产学研合作项目( 2010B090400137)

Abstract

Abstract:

In this paper,the existing lightning strike protection problems of distributed hydropower grid are analyzed in terms of grid-connected hydropower lines,hydropower stations and customers,and the lightning strike risk composition and risk sharing differences between grid-connected hydropower lines and normal ones are presented. Then,the lightning strike risk index is proposed. Moreover,a lightning strike risk evaluation model for the power
grid with distributed hydropower is established,which considers the lightning strike exposure,the probability of line failure,and the losses. Finally,this model is used for evaluating Shaoguan power grid which contains various hydropower stations. It is found that lightnig risks mainly occcur on the grid-connected hydropower lines rather than the normal ones,and that lightning strikes may result in high power failure and severe waste of renewable resources. The paper points out that such lightning strike risks can only be avoided by building smart distribution grids and enhancing the electricity market. To this end,several measures to reduce lightning strike risks are also proposed.

Key words: distributed grid, hydropower, lightning strike, risk

Zhang Yong-jun Huang Hui Liu Yang-hai Chen Zhi-feng. Lightning Strike Risk Evaluation of Power Grid with Distributed Hydropower[J]. Journal of South China University of Technology (Natural Science Edition), 2011, 39(10): 127-131.

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Lightning Strike Risk Evaluation of Power Grid with Distributed Hydropower

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