引用本文: | 高骏,王磊,周文,等.双馈风电机组电网背景谐波运行与谐波抑制策略研究[J].电力系统保护与控制,2016,44(23):164-169.[点击复制] |
GAO Jun,WANG Lei,ZHOU Wen,et al.Study on operating behavior and suppression strategy of doubly-fed induction generators wind turbine under harmonic grid voltage conditions[J].Power System Protection and Control,2016,44(23):164-169[点击复制] |
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摘要: |
针对电网背景低次谐波引起的双馈风电机组定子电流畸变、功率及电磁转矩脉动,建立了能够反映电网5、7次谐波电压下双馈发电机的特征谐波模型,揭示了电网背景谐波电压对双馈发电机功率与电磁转矩脉动的影响机理。通过双馈发电机控制目标分析,提出了基于比例-积分-谐振(PIR)调节转子电流内环的双馈发电机双闭环控制策略,有效地消除了双馈风力发电机定子输出电流中的5、7次谐波和电磁转矩脉动。在Matlab/Simulink中建立了1.5 MW双馈风电机组仿真模型,实现了风电机组谐波运行与抑制的全过程仿真。利用电网谐波发生模拟装置,进行了双馈机组谐波运行与抑制现场试验,仿真与现场试验证明了理论分析的正确性与谐波抑制策略的有效性。 |
关键词: 双馈发电机 电网谐波 转矩脉动 PIR调节器 谐波抑制 |
DOI:10.7667/PSPC152180 |
投稿时间:2015-12-16修订日期:2016-03-28 |
基金项目: |
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Study on operating behavior and suppression strategy of doubly-fed induction generators wind turbine under harmonic grid voltage conditions |
GAO Jun,WANG Lei,ZHOU Wen,GUO Jie,MENG Liang |
(State Grid Hebei Electric Power Research Institute, Shijiazhuang 050021, China) |
Abstract: |
As the stator current will distort and electromagnetic torque of the doubly-fed induction generator wind turbine (DFIG-WT) will pulse due to low order grid harmonics voltage, the mathematical model of DFIG under the 5th and 7th order harmonics grid voltage is built, and the stator current and electromagnetic torque pulsation problems caused by the harmonics distortion is analyzed. The dual-loop closed control strategy based on rotor current PIR regulator is designed to suppress stator current harmonics and electromagnetic torque pulsation by the control target analysis. A 1.5 MW DFIG-WT is modeled in Matlab/Simulink, and the harmonic operating and suppressing process of DFIG-WT is simulated. And the field test is carried out on the 1.5MW DFIG-WT by grid harmonic generation equipment. The simulation and experimental results support the theoretical analysis and verify the proposed control strategy. |
Key words: doubly-fed induction generator (DFIG) grid harmonic torque pulsation PIR controller harmonic suppression |