Bidirectional Power Constraints and Influence of Doubly Fed Induction Generator Participating in Continuous Frequency Regulation
Mu Gang1, Cai Tingting1,2, Yan Gangui1, Liu Hongbo1, Liu Sutong1
1. Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin 132012 China;; 2. School of Electrical and Electronics Engineering North China Electric Power University Beijing 102206 China
Abstract：Wind turbines participating in frequency regulation is one of the means to solve the inadequate regulation capacity in high proportion renewable energy power system. The doubly fed induction generator (DFIG) can reserve part of power to obtain bidirectional frequency regulation capability through rotor over-speed. The available bidirectional regulation power of the wind turbine is limited by the rated speed. According to the elementary operation equation of the wind turbine, the expression of maximum regulation power of DFIG through rotor over-speed is deduced in this paper. It is pointed out that the available bidirectional regulation power of the wind turbine is constrained by the power reservation coefficient and the maximum regulation power. The influence of bidirectional power constraints is analyzed when wind turbines participate in continuous frequency regulation, and the adjustment coefficient area of the wind turbine is given. Based on 24-hour measured data of a wind farm, the level of wind turbines frequency regulation power that meets the adjustment coefficient is simulated and calculated during the course of the actual frequency variation. The influence of power reservation coefficient on frequency quality, frequency regulation power of the wind turbine and utilization of wind power is empirically analyzed. The results show that the effects of bidirectional power constraints must be considered when evaluating the effectiveness of wind turbines in continuous frequency regulation.
穆钢, 蔡婷婷, 严干贵, 刘洪波, 刘宿彤. 双馈风电机组参与持续调频的双向功率约束及其影响[J]. 电工技术学报, 2019, 34(8): 1750-1759.
Mu Gang, Cai Tingting, Yan Gangui, Liu Hongbo, Liu Sutong. Bidirectional Power Constraints and Influence of Doubly Fed Induction Generator Participating in Continuous Frequency Regulation. Transactions of China Electrotechnical Society, 2019, 34(8): 1750-1759.
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2019, Vol. 34 
