Large-Signal Stability Analysis of DC Microgrid with Constant Power Loads
Teng Changpeng1, Wang Yubin1, Zhou Bokai2, Wang Fan1, Zhang Fengyi1
1. School of Electrical Engineering Shandong University Jinan 250061 China; 2. School of Telecommunications Engineering Xidian University Xi’an 710126 China;
Abstract：In the DC microgrid, varieties of power electronic converters are connected to the DC bus with different control methods to stabilize bus voltage. Among these converters, there are power converters that they accurately control the output voltage through closed voltage loops. They behave as constant power loads (CPL) and have a destabilizing effect from negative incremental resistance (NIR) and their nonlinearities. The large-signal stability of the DC microgrid with multiple constant power loads are studied in this paper, mixed potential function theory and Lyapunov stability theorem are used to estimate the boundary of power limit, the influences of circuit parameters on the boundary of power limit of two estimation methods are also compared; T-S fuzzy modeling method and reverse trajectory tracking technique are used to estimate the region of asymptotic stability(RAS), the estimation precision as well as influences of circuit parameters of two estimation methods on estimating the region of asymptotic stability are also compared. Finally, the effectiveness of estimation methods used for the boundary of power limit and the region of asymptotic stability are verified by simulation results.
滕昌鹏,王玉斌,周博恺,王璠,张丰一. 含恒功率负载的直流微网大信号稳定性分析[J]. 电工技术学报, 2019, 34(5): 973-982.
Teng Changpeng, Wang Yubin, Zhou Bokai, Wang Fan, Zhang Fengyi. Large-Signal Stability Analysis of DC Microgrid with Constant Power Loads. Transactions of China Electrotechnical Society, 2019, 34(5): 973-982.
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2019, Vol. 34 
