三电平有源电力滤波器死区效应分析与补偿  

Analysis and compensation of dead-time effect of three-level active power filter

作　　者：黄海宏[1] 江念涛 黄楠楠[1] 王海欣[1] 

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009

出　　处：《电力自动化设备》2017年第11期99-103,共5页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51177037)~~

摘　　要：针对有源电力滤波器(APF)的死区效应问题,在三电平APF等效开关电路的基础上,从死区效应生成原理出发,结合三电平开关状态方程,推导出死区时间与电流跟踪误差之间的线性关系,阐释了死区时间带来的影响。提出了一种死区补偿方法,给出了补偿方法的控制原理图,并从控制系统的闭环特性角度分析了系统的性能。对比了无死区系统与死区补偿系统的性能,发现后者具有更好的稳态性能。通过仿真和实验结果表明所提方法能有效抑制死区效应。In view of the dead-time effect of APF（Active Power Filter）,the generation principle of the deadtime effect is analyzed on the basis of three-level switching state equations and three-level APF equivalent switching circuit.The linear relationship between the dead-time and the current tracking error is derived,and the effect of dead-time is illustrated.A dead-time compensation approach is proposed,and its control principle diagram is given.The performance of the system is analyzed in aspects of closed-loop characteristics.Comparisons between the system with and without dead-time compensation indicate that with dead-time compensation,the system has better steady state performance.Simulative and experimental results demonstrate that the proposed method can effectively suppress the dead-time effect.

关 键 词：三电平有源电力滤波器 死区效应 状态方程 跟踪误差 闭环特性 有源滤波器 

分 类 号：TN713[电子电信—电路与系统]