三相恒频PWM整流器的直接功率控制研究  

Research on Direct Power Control of Three-phase PWM Rectifier with Constant Switch Frequency

作　　者：唐雄民[1] 朱燕飞[1] 

机构地区：[1]广东工业大学自动化学院,广东广州510006

出　　处：《电气传动》2011年第11期32-37,共6页Electric Drive

基　　金：广东省重大科技专项(2009A080304011)

摘　　要：提出了一种基于功率预测模型的三相PWM整流器控制策略。控制策略利用瞬时功率理论预测下一个固定周期内电路的有功和无功变化,直接求取整流器交流侧的电压矢量,并采用空间矢量调制方法来保证整流器工作频率的恒定。还对由于采样、实时计算等原因引起的延时对电路有功和无功的影响进行探讨,并给出了补偿方法。仿真结果验证了控制策略和补偿方法的有效性。A predictive direct power control strategy for three-phase pulse width modulation rectifier was presented. Based on instantaneous active and reactive power theory, the rectifier＇s active and reactive power variations were predicted in the next sampling period and control vector of rectifier was directly calculated. With control vector of rectifier, space vector modulation was used to generate the required switch pulse of converter in a constant switching frequency. The impact of sampling delay and online calculation delay on the accu- racy of active and reactive power was analyzed, and the compensation method was achieved. Simulation results validate the control strategy and compensation method.

关 键 词：PWM整流器 直接功率控制 预测算法 恒频 补偿 

分 类 号：TM461[电气工程—电器]