摘要
针对撬棒保护电路技术存在的问题,介绍了一种快速变桨控制技术和撬棒保护电路技术协调的控制方法,利用该方法不仅能够限制双馈机组转子过电流,还能够抑制其转速的快速增加,从而防止机组过速跳闸,改善系统转速稳定性,确保双馈风电机组成功穿越电网电压跌落故障。利用仿真软件MATLAB/Simulink,完成了基于2个不同时间尺度的电压故障条件下的仿真实验。仿真实验结果验证了所提故障穿越方案的有效性,尤其是对于较长时间的电压故障,故障穿越能力提高的效果更为明显。
A scheme of coordination between pitch control and Crowbar control is presented,which prevents the over-speed trip,improves the system speed stability and ensures the low-voltage ride-through of DFIG （Doubly Fed Induction Generator） wind turbines by limiting the over current of rotor and suppressing the rapid increase of its speed. Simulative experiments are performed with MATLAB/Simulink for two voltage faults with different time durations and results show that the enhancement of ride-through capability is more obvious for long time voltage fault ,verifying the validity of the proposed ride-through scheme.
出处
《电力自动化设备》
EI
CSCD
北大核心
2013年第4期18-23,共6页
Electric Power Automation Equipment
基金
国家自然科学基金资助项目(50907040)
上海市科学基金资助项目(10dz1203902)~~
关键词
双馈电机
撬棒保护
风电
变桨控制
协调控制
doubly fed induction generator
Crowbar protection
wind power
pitch control
coordinated control
