期刊
IEEE TRANSACTIONS ON SIGNAL PROCESSING
卷 62, 期 16, 页码 4052-4063出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSP.2014.2332438
关键词
Phase mismatch; PMU; SCADA; state estimation
资金
- Macao Science and Technology Development Fund [067/2013/A]
- U.S. Air Force Office of Scientific Research under MURI [FA9550-09-1-0643]
Phasor measurement units (PMUs) have the advantage of providing direct measurements of power states. However, as the number of PMUs in a power system is limited, the traditional supervisory control and data acquisition (SCADA) system cannot be replaced by the PMU-based system overnight. Therefore, hybrid power state estimation taking advantage of both systems is important. As experiments show that sampling phase errors among PMUs are inevitable in practical deployment, this paper proposes a distributed power state estimation algorithm under PMU phase errors. The proposed distributed algorithm only involves local computations and limited information exchange between neighboring areas, thus alleviating the heavy communication burden compared to the centralized approach. Simulation results show that the performance of the proposed algorithm is very close to that of centralized optimal hybrid state estimates without sampling phase error.
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