电力系统自动化2025，Vol.49Issue(9)：166-174,9.DOI:10.7500/AEPS20231120004
基于无功电流补偿的直驱风机故障后过电压抑制策略
Post-fault Overvoltage Suppression Strategy for Direct-drive Wind Turbine Based on Reactive Current Compensation
摘要
Abstract
The transient overvoltage after low voltage ride-through(LVRT)of direct-drive wind turbines caused by control delay may lead to cascading disconnection of units,which becomes a key factor limiting renewable energy accommodation,but the current research lacks the improved fault ride-through strategy for suppressing this overvoltage from the source.To this end,the generation mechanism of the overvoltage after fault clearing is first quantitatively analyzed,and the expressions between the terminal voltage,the grid parameters and active/reactive current outputs are analyzed and derived.Then,based on the obtained analytical relationship,the composition of control delay is analyzed,and an overvoltage suppression strategy based on adaptive reactive current compensation is proposed.By quickly recognizing the end of the LVRT process,the strategy adaptively adjusts the reactive current reference value of units according to the grid parameters and measured active current,which eliminates the impact of some delay links.Simulation results verify that,the proposed control strategy can effectively suppress overvoltage and relieve the risk of system instability after fault clearing,which improves the safety and stability of the power system with renewable energy.关键词
直驱风机/故障穿越/过电压抑制/控制延时/无功电流补偿Key words
direct-drive wind turbine/fault ride-through/overvoltage suppression/control delay/reactive current compensation引用本文复制引用
曹斌,郑子萱,刘鸿清,谢琦,贾振国,吴集光..基于无功电流补偿的直驱风机故障后过电压抑制策略[J].电力系统自动化,2025,49(9):166-174,9.基金项目
国家自然科学基金资助项目(52277115). This work is supported by National Natural Science Foundation of China(No.52277115). （52277115）
