基于电流源型PWM整流器的高效电池充电系统设计  

High-efficient battery charging system based on current-source PWM rectifiers

作　　者：郭强[1] 刘和平[1] 彭东林[2] 张毅[1] 刘庆[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044 [2]重庆理工大学机械检测技术与装备教育部工程研究中心,重庆400054

出　　处：《电力自动化设备》2015年第6期23-30,共8页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51127001);输配电装备及系统安全与新技术国家重点实验室自主研究项目(2007DA-10512713302)~~

摘　　要：为了解决目前大功率充电系统所存在的电池电压匹配、充电效率等方面的问题,采用三相电流源型整流器(CSR)作为充电系统拓扑结构。采用间接电流控制策略对网侧电压信号进行延迟修正,从而实现网侧单位功率因数控制。在传统恒压-恒流(CC-CV)充电策略基础上,依据电池电化学特性,提出一种基于模糊推理控制策略的CC、CV充电模式切换算法。采用频域法对CV充电模式下的控制环路传递函数进行分析,并考虑数字时间延迟对系统的影响;利用MATLAB/SISO设计工具,分别对电流内环和电压外环控制器的零点位置与环路增益进行优化,以提高系统的整体性能。仿真与实验结果验证了所提策略的正确性与可行性。CSR（Current-Source Rectifier） is adopted as the system topology of large-power charging system to improve its battery voltage adaption and charging efficiency. The indirect current control strategy is employed to carry out the delayed correction of grid-side voltage signal for the unit power factor control at grid-side. Based on the traditional CC-CV（Constant Current-Constant Voltage） charging mode,a CC-CV switehover algorithm based on the fuzzy-reasoning control strategy is proposed according to the electrochemical characteristics of the battery. The frequency-domination method is applied to analyze the transfer function of control loop in the CV charging mode and the impact of digital time delay on charging system is considered. In order to improve the overall performance of charging system,the MATLAB/SISO design tool is applied to optimize the zero-point position of loop controller and the loop gain for inner current loop and outer voltage loop. The correctness and feasibility of the proposed strategy are verified by the simulative and experimental results.

关 键 词：电动汽车 电流源型整流器 电池 充电 模糊控制 控制器设计 间接电流控制 传递函数 

分 类 号：TM46[电气工程—电器] U469.72[机械工程—车辆工程]