摘要
根据风电场接入电网的规定,在电网发生故障的情况下风力发电机组应能保持与电网的连接。电网电压跌落是电网故障常见的情况之一。根据低电压穿越技术的基本特点,本文以双馈感应发电机组(DFIG)作为研究对象。通过改进转子侧的控制策略和增加Crowbar保护电路来实现低电压穿越并且搭建了DFIG MATLAB/SIMULINK仿真模型。通过仿真研究表明,改进的控制策略能使DFIG在电网跌落时实现不间断运行,验证了模型的合理性及控制策略的可行性,有效提高了DFIG风电机组运行的可靠性。
According to the provisions of wind farms connected to the grid, in case of power grid faults the wind generator need to be capable of maintaining a wind turbine with grid connection. Voltage dips is often the case of power grid faults. According to the low voltage ride through the basic principles of technology, a study for double-fed induction generator （DFIG） in this paper, it achieve low voltage ride through during voltage dip by improving the rotor side control strategy and the Crowbar protection circuitry, build a DFIG MATLAB / SIMULINK simulation model. The simulation studies show that the improved control strategy can DFIG grid drops in continuous operations to verify the model is reasonable and feasible control strategies, improve the operation of DFIG Wind turbine reliability.
出处
《微计算机信息》
2012年第10期99-100,206,共3页
Control & Automation
关键词
变速恒频
双馈感应发电机
电压跌落
数学模型
低电压穿越
variable speed constant frequency
Doubly fed induction generator wind turbine
voltage dip
Mathematical model
Low voltage ride through
