电力系统自动化2013，Vol.37Issue(7)：12-17,54,7.DOI:10.7500/AEPS201205169
电网电压不平衡且谐波畸变时双馈风电机组转矩波动抑制
Torque Oscillation Suppression of DFIG-based Wind Turbines Under Unbalanced and Distorted Grid Voltage Conditions
摘要
Abstract
An integral mathematical model of doubly-fed induction generator (DFIG) based wind turbine is developed under weak network conditions with voltage unbalance and distortion of fifth-order and seventh-order harmonics, where the influences of the negative sequence and harmonic components on the electromagnetic torque and stator active and reactive powers are modelled in details. An approach to suppress torque oscillations is then proposed, with a novel proportion integral-double frequency resonance (PI-DFR) current controller being designed and the rotor current references being re-arranged. It can effectively and quickly regulate both the positive/negative sequence and harmonic components, without the need of sequence decomposition of the rotor currents. Experiment results indicate that the proposed control can significantly suppress the torque oscillations and improve the power quality, and thus enhance the ride-through capability and operation reliability of DFIG-based wind turbine under adverse grid conditions. The work is supported by National Natural Science Foundation of China (No. 50907057) and Scholarship Award for Excellent Doctoral Student Granted by Ministry of Education.关键词
双馈感应发电机/电网电压不平衡/谐波电压/电磁转矩/电流控制器Key words
doubly- fed induction generator (DFIG) / grid voltage unbalance/ harmonic voltage/ electromagnetic torque/ current controller引用本文复制引用
徐海亮,章玮,陈建生,胡家兵,贺益康..电网电压不平衡且谐波畸变时双馈风电机组转矩波动抑制[J].电力系统自动化,2013,37(7):12-17,54,7.基金项目
国家自然科学基金资助项目(50907057) （50907057）
教育部博士研究生学术新人奖资助项目. （）
