摘要
为了快速、准确调节有源前端(AFE)的电压、电流,在平均值数学模型基础上研究了其双闭环控制策略及参数整定方法。推导了AFE在静止及旋转坐标系下的电压、电流方程;应用前馈方法对dq轴电流控制实现解耦,推导出电流环、电压环传递函数,并采用频域响应设计方法对控制器参数进行整定;搭建了数字仿真模型,对理论分析结果做了验证。仿真结果表明,系统动、静态响应与理论分析基本一致,所述建模及参数整定方法简单、可行,具有令人满意的动、静态控制效果。
Active front end（AFE）,which is referred to pulse width modulation（PWM） rectifier,is widely used in many industrial and renewable energy fields.This paper makes a study on double closed loop control strategy of AFE based on average modeling to adjust its voltage and current fast and precisely.At first,voltage and current equations of AFE in synchronous rotating references are derived.Then,feed forward method is used to decouple current components in d and q axes.Transfer functions of current and voltage control loop are derived,and parameters of PI controllers are tuned by using frequency response method.Finally,digital simulation results are given to verify the theoretical analysis.As a result,it is concluded that the modeling and parameter tuning method is simple and feasible,satisfying dynamic and steady control performance.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2014年第5期55-59,共5页
Proceedings of the CSU-EPSA
关键词
有源前端
平均值模型
闭环控制
参数整定
active front end （AFE）
average model
closed-loop control
parameter tuning
