摘要
在综合已有直驱永磁发电机组低电压穿越方法的基础上,提出了一种新的低电压穿越协调控制策略,即减少发电机出力,协调使用卸荷电阻控制和桨距角控制,以避免发电机超速和直流电容过电压为控制目标,保证变流器和发电机的运行安全,同时减少卸荷电阻的使用频率。使用PSCAD/EMTDC搭建直驱永磁风力发电系统,设计算例对直驱永磁发电机组低电压穿越协调控制策略进行仿真,仿真结果验证了控制策略的有效性和正确性。
On the basis of synthesizing existing low voltage ride-through （LVRT） methods for direct-drive permanent magnet wind power generating units, a new coordinated control strategy for LVRT is proposed. In the proposed control strategy, derating output of wind power generating units, controlling unloading resistance and controlling pitch angle are coordinatively utilized to ensure the operational security of converters and generation units, and the prevention of overspeed operation of generation units and overvoltage on DC capacitors are taken as control objectives to ensure the operational security of converters and generation units, and in the meantime, to reduce the usage frequency of unloading resistance. A direct-drive permanent magnet wind power generation model is constructed by PSCAD/EMTDC, and the proposed coordinated control strategy for LVRT of direct-drive permanent magnet wind power generating units is simulated. Simulation results show that the proposed coordinated control strategy is correct and effective.
出处
《电网技术》
EI
CSCD
北大核心
2013年第5期1464-1470,共7页
Power System Technology
基金
国家863高技术基金项目(2011AA05A105)~~
关键词
直驱永磁
低电压穿越
协调控制
减出力
卸荷电阻
桨距角控制
direct-drive permanent magnet
low voltageride-through
coordinated control
derating output
unloadingresistance
pitch angle control
