电网技术2023，Vol.47Issue(12)：4995-5004,10.DOI:10.13335/j.1000-3673.pst.2022.2448
基于直流电压同步的构网型直驱风机两阶段主动阻尼支撑控制策略
Two-stage Control of DC Voltage-synchronized Directly-driven Wind Turbine for Active Damping Support
摘要
Abstract
The existing controls of wind turbines(WT)achieve damping provision mainly by active power modulation,which may affect the wind energy harvest.This paper proposes a two-stage control of the grid-forming direct-driven WTs to actively provide damping supports by fully using the WT resources.In stage one,two damping controllers are designed by the reactive power modulation based on the DC voltage synchronization control.The impacts of the control parameters and the operating conditions on the system stability are evaluated.The proposed controllers utilize the reactive power modulation and the DC capacitor energy for its damping provision,while the WT is operated at the maximum power point tracking(MPPT)mode.In the second stage,when the DC voltage fluctuation exceeds the designed threshold,the WT power controller immediately starts,further enhancing the system damping using the WT-side resources.An MPPT recovery process is further designed to eliminate the droop effects induced by the damper.The proposed controller does not require a frequency estimator and the active power modulation for the synchronization purposes between WT and the weak AC grid.Meanwhile,it well resolves the paradox between energy efficiency and providing strong damping support by considering the energy costs.关键词
直流电压同步控制/构网型控制/直驱风机/最大功率追踪/阻尼控制器/有功/无功功率调制Key words
DC voltage synchronization control/grid-forming control/directly-driven wind turbine/MPPT/damping controller/active/reactive power modulation分类
信息技术与安全科学引用本文复制引用
袁枭添,杜正春,李宇骏,林鸿飞,江晗,李佳朋,吴小芳..基于直流电压同步的构网型直驱风机两阶段主动阻尼支撑控制策略[J].电网技术,2023,47(12):4995-5004,10.基金项目
国家重点研发计划项目(2022YFB2402705).Project Supported by National Key Research and Development Program of China(2022YFB2402705). （2022YFB2402705）
