1.Inner Mongolia Electric Power Research Institute of Inner Mongolia Power (Group) Co., Ltd., Hohhot 010020, China;2.College of Electrical Engineering, Zhejiang University, Hangzhou 310027;3.Electric Power Research Institute of State Grid Sichuan Electric Power Company, Chengdu 610041, China
In recent years, the continuous growth of the installed capacity of renewable energy generation has brought new problems to the stability of power systems. An analysis method based on the frequency response matrix is proposed to calculate the influence of wind power grid connection on the low-frequency oscillation mode in power systems. The result shows that the phase sum of some elements in the frequency response matrix of the synchronous grid and wind turbine system determines the influence of wind power at different access points on the low-frequency oscillation mode. Compared with the traditional analysis method, the vector margin method only needs to obtain the low-frequency oscillation mode and the transfer function matrix of the wind turbine system and synchronous grid system without the necessity of calculation of eigenvectors and residue. The process is simple and the result is intuitive. When multiple wind turbines are integrated to the system simultaneously, the influence of each wind turbine can be observed visually in a two-dimension complex plane. The effectiveness of the analysis results can be verified by the case of Inner Mongolia grid in China.
|||ZHANG Aijun, LI Dandan, ZHANG Qingbo, et al. Analysis of Influence of Wind Power Grid Connection on Low-frequency Oscillation Mode Based on Vector Margin Method[J]. Automation of Electric Power Systems,2021,45(2):122-129. DOI:10.7500/AEPS20200622004|