直流电容储能反馈和负载功率前馈的Boost变换器控制策略

发布时间：2018-01-06 08:28

本文关键词：直流电容储能反馈和负载功率前馈的Boost变换器控制策略　出处：《电力自动化设备》2014年08期 　论文类型：期刊论文

【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。
[Abstract]:Based on the mathematical model of state space average equation of Boost converter, the power transfer relation is derived, and a kind of current as inner loop is proposed. The DC side capacitor energy storage is used as the feedback control strategy of the outer loop, the current inner loop is controlled by hysteresis current, and the capacitor energy storage outer loop is controlled by Pi regulator. In order to further improve the speed of the system and reduce the impact of load disturbance on the system, the feedforward of load power is introduced. An algorithm for estimating feedforward power is given. The dynamic and steady characteristics of the traditional voltage and current double closed loop and the proposed control strategy are compared. The results show that. The proposed control strategy can meet the control requirements of the steady state of the system and has better dynamic characteristics than the traditional voltage and current double closed loop control strategy.
【作者单位】：合肥工业大学电气与自动化工程学院;
【基金】：国家自然科学基金资助项目(51007018)~~
【分类号】：TM46
【正文快照】： 0引言Boost变换器广泛应用于电动汽车、航空航天电源系统、LED照明、不间断电源系统等领域。近年来特别是在移动电站、电力系统功率因数校正以及新能源并网等场合,Boost变换器的重要性越来越得到体现。随之而来的是对其系统动、静态性能的要求也逐渐提高。在状态空间平均法下,

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