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

doi:10.19595/j.cnki.1000-6753.tces.161766

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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.

Key words： Optimal phasor measurement unit (PMU) placement wide area monitoring system (WAMS) observability reliability node probabilistic observability zero-injection node

Received: 10 November 2016 Published: 24 April 2018

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TM711

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	Luo Shenzeng
	Li Yinhong
	Shi Dongyuan

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Luo Shenzeng,Li Yinhong,Shi Dongyuan. Wide Area Monitoring System Observability Probabilistic Evaluation and It’s Application in Optimal PMU Placement[J]. Transactions of China Electrotechnical Society, 2018, 33(8): 1844-1853.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.161766 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I8/1844

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