摘要
分析了基于单周期的PWM控制原理及其相对于传统PWM控制方法的优点,将单周期控制方法运用到双馈风力发电的双PWM励磁变换器中。以输出直流稳定电压作为网侧变换器的控制目标,推导出整流电路中的单周期控制策略;以输出跟随参考控制信号变化的交流励磁电流作为转子侧变换器控制目标,推导出逆变电路中的单周期控制策略。仿真结果证明基于单周期的双PWM励磁变换器一方面可以保证直流母线电压的稳定,另一方面能够快速地为双馈电机转子提供可调节的励磁电流,达到很好的控制效果。
By analyzing the control principles of PWM based on one-cycle control （OCC） and its advantages, OCC is applied to dual-PWM converter of doubly-fed wind power. Taking output of de voltage stability as the control objective of grid-converter, a control strategy of rectifier circuit employing OCC is deduced. A control strategy of inverter circuit employing 0CC is deduced using output of field current changing with reference signals as the control objective of rotor-converter. Simulation results indicate that dual-PWM converters based on OCC control strategy can guarantee the DC output voltage stability and modulate the field current, good control effect is achieved.
出处
《江南大学学报（自然科学版）》
CAS
2011年第6期642-647,共6页
Joural of Jiangnan University (Natural Science Edition)
基金
国家自然科学基金项目(61104183)
教育部新世纪优秀人才支持计划项目(NCET-10-0437)
关键词
双馈电机
单周期控制
双PWM变换器
励磁电流
doubly-fed wind power, one-cycle control, dual-PWM converter, field current
