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. DOI: 10.13335/j.1000-3673.pst.2022.2448
引用本文: 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. DOI: 10.13335/j.1000-3673.pst.2022.2448
YUAN Xiaotian, DU Zhengchun, LI Yujun, LIN Hongfei, JIANG Han, LI Jiapeng, WU Xiaofang. Two-stage Control of DC Voltage-synchronized Directly-driven Wind Turbine for Active Damping Support[J]. Power System Technology, 2023, 47(12): 4995-5004. DOI: 10.13335/j.1000-3673.pst.2022.2448
Citation: YUAN Xiaotian, DU Zhengchun, LI Yujun, LIN Hongfei, JIANG Han, LI Jiapeng, WU Xiaofang. Two-stage Control of DC Voltage-synchronized Directly-driven Wind Turbine for Active Damping Support[J]. Power System Technology, 2023, 47(12): 4995-5004. 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: 传统的风力机组主要依赖有功功率调制实现阻尼提升,这可能会影响风能捕获。针对此,面向利用直流电压同步的构网型直驱风机,设计了一种两阶段主动阻尼支撑控制策略。在第1阶段,基于直流电压同步控制,提出了2种基于无功功率调制的阻尼控制器,评估了控制器参数和运行工况对阻尼效果的影响。所提控制器利用直流电容储能和换流器无功资源为系统提供阻尼支撑,而风机运行在最大功率追踪模式。在第2阶段,当直流电压波动超过设计的阈值后,风电机组功率控制器随即启动,通过调用风机侧资源进一步提升系统阻尼。进一步设计了风机转速恢复策略以消除有功有差调节带来的下垂影响。所提控制策略无需锁相环和有功功率调制即可实现风机和弱电网之间的同步。同时,考虑能量代价,权衡了风能捕获的经济性要求和提供阻尼的稳定性要求。

     

    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.

     

/

返回文章
返回