直流电容储能反馈和负载功率前馈的Boost变换器控制策略  

Control strategy based on DC-link capacitor energy feedback and load power feedforward of Boost converter

作　　者：姜卫东[1] 吴志清[1] 胡杨[1] 佘阳阳[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》2014年第8期103-107,共5页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51007018)~~

摘　　要：从Boost变换器的状态空间平均方程数学模型出发,推导出其功率传递关系。在此基础上提出了一种以电流作为内环、直流侧电容储能作为外环的反馈控制策略,电流内环采用滞环电流控制,电容储能外环采用PI调节器控制,并设计了相应的控制器。为了进一步提高系统的快速性,减小负载扰动对系统的影响,引入负载功率的前馈,并给出了前馈功率的估计算法。实验比较了传统的电压电流双闭环和所提控制策略的动、稳态特性,结果表明,所提出的控制策略能满足系统稳态时的控制要求,并且较传统的电压电流双闭环控制策略具有更好的动态特性。The mathematical model of state space average equation is established for Boost converter and its power transfer relationship is deduced,based on which,a dual closed-loop control strategy is put forward and the corresponding controller is designed. The inner closed-loop adopts the hysteresis current control and the outer closed-loop adopts the PI regulator of DC-link capacitor energy storage. To further improve the system rapidity and reduce the influence of load disturbance on system,the load power feedforward is applied and its power evaluation algorithm is given. The static and dynamic performances are compared by experiments between the traditional voltage-current dual closed-loop control strategy and the proposed control strategy, which shows that,the proposed strategy meets the requirements of steady-state control and has better dynamic performance.

关 键 词：变换器 储能 反馈控制 电流控制 双闭环 负载功率前馈 前馈控制 

分 类 号：TM46[电气工程—电器]