摘要
要保证双馈电机具有低电压穿越能力,关键是要限制转子过电流和直流母线过电压。提出了采用转子侧Crowbar保护电路和直流侧卸荷保护电路协调配合的保护方案。用转子侧保护电路来抑制转子过电流,直流侧卸荷保护电路来维持直流母线电压恒定。在此基础上用MATLAB/Simulink软件搭建了仿真模型,并从理论仿真和现场实验测试2个方面对该方法进行验证,仿真与实验结果表明,该方案可以提高DFIG低电压穿越能力。
The key to ensure that the doubly-fed machine has low voltage ride through capability is to limit the over-current on the rotor and the over-voltage on the DC bus. The paper proposes a protection program in which the rotor side Crowbar protection circuit is used to suppress the rotor over-current and the DC side unloading protection circuit is used to maintain the DC bus voltage constant. Based on this,the model of the DFIG is built by MATLAB/Simulink,and the method is validated from two aspects of theoretical simulation and field test,and the results show that this method can improve the LVRT capability of the DFIG.
出处
《电网与清洁能源》
2014年第4期47-52,59,共7页
Power System and Clean Energy
基金
基于随机线性时滞系统鲁棒控制理论的电力系统间谐波治理关键技术研究(国家自然科学基金51177112)~~
关键词
风力发电
双馈感应电机
低电压穿越
Crowbar装置
仿真实验
wind power
doubly-fed induction generator(DFIG)
low voltage ride through(LVRT)
Crowbar device
simulation experiment
