外环采用电容储能反馈内环采用改进无差拍控制的PWM整流器的控制方法  

A Control Method Based on Outer Loop Adopting the Feedback of Capacitor Energy Storage and Internal Loop Adopting Improved Deadbeat Control for PWM Rectifier

作　　者：姜卫东[1] 汪磊[1] 赵德勇[1] 戴安刚 胡杨[1] 王永生[1] 黄辉[1] 

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽省合肥市230009 [2]南京埃斯顿自动化控制技术有限公司,江苏省南京市210000

出　　处：《中国电机工程学报》2016年第14期3899-3908,共10页Proceedings of the CSEE

摘　　要：该文首先介绍了三相电压型脉冲宽度调制(pulse width modulation,PWM)整流器在三相静止abc坐标系下的数学模型,介绍了一种在两相静止αβ坐标系下基于无差拍控制(deadbeat control,DBC)的PWM整流器的数学模型及其离散化方法。在对给定电流进行"两步预测"的基础上提出了电流校正方法,既能解决由于采样和数字处理过程中导致的延时补偿问题,又能降低采样引起的误差。在环路设计中,外环采用基于电容储能为反馈变量的控制方法,并将负载功率估计后进行前馈,提高了外环的抗干扰能力。最后,在实验室搭建了PWM整流器的实验平台,验证了所提出控制方法的可行性。ABSTRACT： The mathematical model of three-phase voltage pulse width modulation （PWM） rectifier in the three-phase abc stationary frame was introduced firstly. On this basis, the mathematical model of PWM rectifier based on deadbeat control （DBC） in the two--phase stationary αβ frame and its discrete method were analyzed. A current correction algorithm was proposed, which was based on ＂two-step prediction＂ of the reference current. This method could not only resolve the problem of delay compensation, but＇also reduce the sampling error. In the loop design, an outer loop control method was discussed which was based on the feedback variable of capacitor energy storage. Meanwhile, the estimated load power was feedforward to improve the anti-jamming capability. Finally, the experimental setup of PWM rectifier was built up in the laboratory, and then the practicability of the proposed control method is verified.

关 键 词：PWM整流器 无差拍控制 电流校正 两步预测 延时补偿 负载功率估计 

分 类 号：TM46[电气工程—电器]