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《Automation of Electric Power Systems》 2008-07
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Online Operation Risk Assessment for Power System Static Security Considering Secondary Devices Models

WU Wenchuan1, NING Liaoyi1, ZHANG Boming1, HE Yunliang2, FENG Yongqing3(1. State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China; 2. Jinghua Electric Power Bureau, Jinghua 321017, China;3. China Southern Power Grid Company, Guangzhou 510623, China)  
Power system operation risk assessment can evaluate the likelihood and severity of contingencies, but it is time-consunming to analyze all possible contingencies in real-time environment. An efficient approach is proposed to automatically generate the reasonable subset of the contingencies. This method is developed based on the concept of event tree, which adopts logic simulation method of protective relay and automatic devices to simulate N-1 cascading failures, and dynamically generates event tree. The scale of event tree is controlled by setting probabilistic precision of event tree, then the computation burden of single operation risk assessment is also controlled. Based on the proposed algorithm,a risk assessment software is developed and embedded into an early warning system and put into real practice.
【Fund】: 国家重点基础研究发展计划(973计划)资助项目(2004CB217908);; 国家自然科学基金资助项目(50647025)~~
【CateGory Index】: TM732
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