Dual-mode Switching Fault Ride-through Control Strategy for Self-synchronous Wind Turbines  

作　　者：Xinshou Tian Yongning Chi Peng Cheng Wei He Yunpeng Zhou Jianzhu Hu 

机构地区：[1]China Institute of Energy and Transportation Integrated Development,North China Electric Power University,Beijing 102206,China [2]State Key Laboratory of Operation and Control of Renewable Energy&Storage Systems,China Electric Power Research Institute,Beijing 100192,China [3]State Grid Zhejiang Electric Power Co.,Economic and Technological Research Institute,Hangzhou,China

出　　处：《Journal of Modern Power Systems and Clean Energy》2023年第2期579-588,共10页现代电力系统与清洁能源学报（英文）

基　　金：supported in part by the National Natural Science Foundation of China (No.52007174)。

摘　　要：The installed capacity of renewable energy generation has continued to grow rapidly in recent years along with the global energy transition towards a 100%renewable-based power system.At the same time,the grid-connected large-scale renewable energy brings significant challenges to the safe and stable operation of the power system due to the loss of synchronous machines.Therefore,self-synchronous wind turbines have attracted wide attention from both academia and industry.However,the understanding of the physical operation mechanisms of self-synchronous wind turbines is not clear.In particular,the transient characteristics and dynamic processes of wind turbines are fuzzy in the presence of grid disturbances.Furthermore,it is difficult to design an adaptive fault ride-through(FRT)control strategy.Thus,a dual-mode switching FRT control strategy for self-synchronous wind turbines is developed.Two FRT control strategies are used.In one strategy,the amplitude and phase of the internal potential are directly calculated according to the voltage drop when a minor grid fault occurs.The other dual-mode switching control strategy in the presence of a deep grid fault includes three parts:vector control during the grid fault,fault recovery vector control,and self-synchronous control.The proposed control strategy can significantly mitigate transient overvoltage,overcurrent,and multifrequency oscillation,thereby resulting in enhanced transient stability.Finally,simulation results are provided to validate the proposed control strategy.

关 键 词：Dual-mode switching self-synchronous wind turbine transient stability fault ride-through(FRT)control 

分 类 号：TM315[电气工程—电机] TP273[自动化与计算机技术—检测技术与自动化装置]