Mixed nonlinear dynamic voltage phasor tracing method based on WAMS/SCADA |
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| Authors: | Xiao-gang Chen Yong-hui Yi Wei Wang Quan-yuan Jiang Chuang-xin Guo Yi-jia Cao |
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| Institution: | (1) School of Electrical Engineering, Zhejiang University, Hangzhou, 310027, China;(2) Hangzhou Electric Power Bureau, Hangzhou, 310009, China;(3) Zhejiang Provincial Electric Power Company, Hangzhou, 310007, China |
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| Abstract: | By considering the static voltage characteristic of the load, we propose a WAMS/SCADA mixed nonlinear method to estimate the voltage of unobservable buses caused by topology change or phasor measurement unit (PMU) malfunction in a power system. By modeling the load characteristic with data from SCADA, we employed the Gauss-Seidel method to solve the nonlinear equations and estimate the voltage of unobservable buses with the high precision voltages of neighboring buses measured by a PMU. Simulations were carried out on the IEEE 39-bus system, and the results show that this novel method can dynamically and accurately trace the variation of the voltage phasor of the unobservable buses. |
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| Keywords: | Wide area measurement system (WAMS) Supervisory control and data acquisition (SCADA) system Observability Dynamic tracing Nonlinear equationDoeument code: A |
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