| 引用本文: | 贾 锋,王瑞明,李 征,蔡 旭,高 强,张 琛.电网故障下风电机组轴系扭振抑制方法[J].电力自动化设备,2015,35(10): |
| JIA Feng,WANG Ruiming,LI Zheng,CAI Xu,GAO Qiang,ZHANG Chen.Torsional vibration suppression of DFIG drive-chain under grid fault[J].Electric Power Automation Equipment,2015,35(10): |
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| 摘要: |
| 通过全面分析不同故障类型和不同运行状态的双馈风力发电机电磁转矩特性以及由此激发的轴系扭振，得出了轴系关键参数对扭振的影响。分析结果表明，从降低模态耦合度的角度考虑的轴系参数配置方案对于抑制电网故障下的扭振无法取得显著成效，应当从削弱故障及恢复时刻转矩过冲和增加阻尼入手。随后提出了一种基于扭转角速度并通过附加电磁转矩实现的传动轴阻尼虚拟配置方法，针对扭转角速度可能难以获取的问题，在此基础上提出了与之等效的基于发电机转速的传动轴阻尼虚拟配置方法，通过大量PSCAD仿真验证了虚拟配置参数的一些特性以及2种参数虚拟配置方法的有效性。 |
| 关键词: 风电 轴系 扭振 刚度 阻尼 关键参数 虚拟配置 电网故障 |
| DOI： |
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| 基金项目:中国电力科学研究院实验室开放基金项目；国家电网公司科技项目 |
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| Torsional vibration suppression of DFIG drive-chain under grid fault |
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JIA Feng1, WANG Ruiming2, LI Zheng1, CAI Xu1, GAO Qiang1, ZHANG Chen1
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1.Wind Power Research Center，School of Electronic Information and Electrical Engineering，Shanghai Jiao Tong University，Shanghai 200240，China;2.China Electric Power Research Institute，Beijing 100192，China
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| Abstract: |
| The electromagnetic torque characteristics of DFIG（Doubly-Fed Induction Generator） and the relevant torsional vibrations are analyzed for different grid fault types and operating conditions，based on which，the influence of key drive-chain parameters on the torsional vibration is obtained. Analytical results show that，the scheme of drive-chain parameter configuration for reducing the modal coupling is ineffective in the suppression of torsional vibration during grid fault；the proper way is to weaken the torque overshoot during the fault occurrence and recovery and to increase the damping of drive-chain. A strategy of virtual drive-chain damping configuration based on the torsional angular velocity and additional electromagnetic torque is proposed. As the torsional angular velocity may not be easily obtained，an equivalent strategy of virtual drive-chain damping configuration based on generator speed is proposed as well. The characteristics of virtual configuration parameters and the effectiveness of two proposed strategies are verified by PSCAD simulations. |
| Key words: wind power drive-chain torsional vibration stiffness damping key parameters virtual configuration grid fault |
