Wide Area Monitoring System Observability Probabilistic Evaluation and It’s Application in Optimal PMU Placement
Luo Shenzeng1, Li Yinhong2, Shi Dongyuan2
1. Central China Power Dispatching and Control Branch of State Grid Company of China Wuhan 430077 China; 2. State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China
Abstract：An observability evaluation method for wide area monitoring system (WAMS) based on node probabilistic observability was proposed, to quickly and accurately assess the WAMS observability from the perspective of reliability. The influencing factors of node observability were analyzed, and the processing approach based on virtual phasor measurement unit (PMU) node was proposed to effectively take into account the impacts of zero-injected node on node observability. Considering PMU and transmission lines availabilities, the probability of node losing observability was obtained. WAMS observability was evaluated based on node probabilistic observability. Its two typical applications in optimal PMU placement were analyzed: ① optimal selection of multi-solution; ② further PMU placement to improve reliability after WAMS is observable. Simulation results based on IEEE 14-bus system and IEEE 57-bus system demonstrate the effectiveness of the proposed evaluation method. Comparisons show that the proposed method has the advantages of accurate calculation and small computation. Applying the proposed WAMS observability evaluation method in optimal PMU placement can further improve the reliability of WAMS observability.
罗深增, 李银红, 石东源. 广域测量系统可观性概率评估及其在PMU优化配置中的应用[J]. 电工技术学报, 2018, 33(8): 1844-1853.
Luo Shenzeng, Li Yinhong, Shi Dongyuan. Wide Area Monitoring System Observability Probabilistic Evaluation and It’s Application in Optimal PMU Placement. Transactions of China Electrotechnical Society, 2018, 33(8): 1844-1853.
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2018, Vol. 33 
