基于负载功率前馈的PWM整流器控制策略  

A Control Strategy of PWM Rectifier Based on the Load Power Feed-forward

作　　者：黄静[1] 杨柏旺[1] 吴志清[1] 佘阳阳[1] 

机构地区：[1]合肥工业大学,安徽合肥230009

出　　处：《电力电子技术》2014年第11期60-62,共3页Power Electronics

摘　　要：此处在整流器数学模型和瞬时功率理论的基础上,提出了基于负载功率前馈的新型电压电流双闭环控制策略。通过对系统瞬时功率的分析,找出功率与电压之间的关系,使得外环以电压的平方为控制变量;电流内环采用电流前馈解耦控制,实现对有功和无功电流的独立控制。在新型双闭环控制基础上,引入负载功率前馈。最后实验证明新型双闭环控制比传统双闭环控制动态性能好,而有负载功率前馈的新型双闭环控制比无负载功率前馈的新型双闭环具有更好的动态响应性能。On the basis of analyzing the mathematical model of the rectifier and the theory of instantaneous power,a new voltage-current dual closed-loop control strategy based on the load power feed-forward control is proposed.By analyzing instantaneous power of the system,the relationship of power and DC voltage can be found,thus the square of voltage can be taken as the controlled variable of the outer loop.In order to control active current and reactive current independendy,current feed-forward decoupling control method is adopted by inner current loop.Load power feedforward control is added into new dual closed-loop control.The experiment proves that new double closed-loop control has better dynamic performance than that of traditional double closed-loop control,and new double closed-loop control with load power feed-forward has better dynamic performance than that of new double closed-loop control without load power feed-forward.

关 键 词：整流器 双闭环控制策略 负载功率前馈 

分 类 号：TM461[电气工程—电器]