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《Transactions of China Electrotechnical Society》 2004-03
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Power System Harmonic State Estimation Based on Phasor Measurements(II) —— Observability Analysis,Quality Evaluation Algorithm and Example Studies

Wu Dugui Xu Zheng (1. XUJI Hitachi Electric Corporation Ltd. Xuchang 461000 2. College of Electrical Engineering Zhejiang University Hangzhou 310027)  
The paper introduces the observability analysis theory, quality evaluation algorithm and practices of Harmonic State Estimation. Observability depends on the number, locations and types of available measurements, as well as the topology of the network. The paper not only extend the observability analysis algorithm of traditional power flow state estimation techniques to harmonic state estimation field, but also provides measurement matrix search algorithm based on dependency theory and logic discrimination algorithm for observability analysis of Harmonic State Estimation, which greatly relieve the difficulty of observability analysis algorithm. Additionally, the paper investigates the statistical characteristics of objective functions of harmonic state estimation problem and thus presents practical algorithm evaluating quality of estimation. Finally, a virtual example is utilized to illustrate the relevant algorithm.
【CateGory Index】: TM711
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