Modeling and Analysis of Active Power-Frequency Response of Parallel VSGs Using a P/ω “Admittance”
Yan Xiangwu1, Jia Jiaoxin1, Wang Desheng1, Qin Benshuang1, He Xiaoyang2
1. Key Laboratory of Distributed Energy Storage and Micro-Grid of Hebei Province North China Electric Power University Baoding 071003 China; 2. State Grid Liaoning Electric Power Supply Co. Ltd Shenyang 110006 China
Abstract：For the existing P/ω “admittance” model, the load disturbance and active-power response of VSGs were considered, but the input of active-power reference and the response of angular frequency were not considered. So the extended P/ω “admittance” model of the multi-VSG parallel system was established. When the parameters of each VSG are matched, the P/ω “admittance” is proportional and two key conclusions are further derived. In the case of load disturbance, the active-power response of VSGs directly enters the steady state process, and the angular-frequency dynamic characteristic is the same as that of any a VSG in the single off-grid mode; in the case of the reference input, the active-power dynamic characteristic of VSGs is the same as that of any a VSG in the single on-grid mode, and the angular-frequency dynamic characteristic is determined by the response of any a VSG in the off-grid and on-grid mode. The simulation and experiment results are consistent with the theoretical analysis, which shows that the model can fully describe the power-frequency response characteristics of the parallel VSGs.
颜湘武, 贾焦心, 王德胜, 秦本双, 何晓洋. 基于P/ω“导纳”的并联虚拟同步机功频响应建模与分析[J]. 电工技术学报, 2020, 35(15): 3191-3202.
Yan Xiangwu, Jia Jiaoxin, Wang Desheng, Qin Benshuang, He Xiaoyang. Modeling and Analysis of Active Power-Frequency Response of Parallel VSGs Using a P/ω “Admittance”. Transactions of China Electrotechnical Society, 2020, 35(15): 3191-3202.
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2020, Vol. 35 
