中国电力2025，Vol.58Issue(4)：68-77,97,11.DOI:10.11930/j.issn.1004-9649.202411040
对称短路故障下直驱风电机组暂态过电压建模与分析
Modeling and Analysis of Transient Overvoltage of Direct Drive Wind Turbine Under Symmetrical Faults
摘要
Abstract
Large-scale wind power bases typically adopt UHVAC/UHVDC transmission systems for power export,with weak grid strength in the collection area.After short-circuit faults,transient overvoltage issues are prone to occur,making it urgent to study the analytical model of transient overvoltage during short-circuit faults in wind turbine generators.Firstly,a transient voltage model after a symmetrical short-circuit fault at the remote end of the transmission line in a weak grid is established based on the typical control and voltage ride-through strategies of permanent magnet synchronous generator wind turbines.By studying the transient voltage components at the grid connection point corresponding to the voltage at the fault point,it is revealed that transient overvoltage may occur at the grid connection point after the instantaneous recovery of the fault point voltage.Secondly,a second-order simplified model suitable for transient overvoltage analysis is proposed,and clarify that the damping ratio of the simplified model is a key factor determining the peak overvoltage value.The expression of peak overvoltage is solved through time-domain analysis,and the influencing factors of transient overvoltage are quantitatively analyzed.Finally,relying on the control hardware-in-the-loop real-time simulation experimental platform,the applicability of the proposed simplified transient overvoltage model and the dominant influencing factors of transient overvoltage are verified.关键词
风电并网系统/暂态过电压/并网点电压解析/电网电压前馈系数/电网强度Key words
wind power grid-connected system/transient over-voltage/PCC voltage analysis/grid voltage feedforward coefficient/power grid strength引用本文复制引用
罗泓博,秦世耀,郭梓暄,李光辉..对称短路故障下直驱风电机组暂态过电压建模与分析[J].中国电力,2025,58(4):68-77,97,11.基金项目
国家电网有限公司科技项目(大规模新能源适应弱电网的主动支撑标准化控制技术及实证,5108-202218280A-2-237-XG). This work is supported by Science and Technology Project of SGCC(Standardized Control Technology and Demonstration for Active Support of Large-Scale Renewable Energy Adapting to Weak Grids,No.5108-202218280A-2-237-XG). （大规模新能源适应弱电网的主动支撑标准化控制技术及实证,5108-202218280A-2-237-XG）
