一种两阶段变步长最大功率点控制策略  

A Two Stage Variable Step-Size Maximum Power Point Tracking Control

作　　者：胡义华[1] 陈昊[1] 徐瑞东[1] 胡贤新[1] 王小昆[1] 

机构地区：[1]中国矿业大学机电与信息工程学院,徐州221008

出　　处：《电工技术学报》2010年第8期161-166,共6页Transactions of China Electrotechnical Society

基　　金：江苏省"六大人才高峰"(07-D-024);江苏省研究生培养创新工程(CX09B-114Z)资助项目

摘　　要：对光伏电池板的数学模型及其输出功率与占空比的函数关系进行分析,提出了一种两阶段变步长最大功率点跟踪策略。利用Matlab/Simulink仿真软件建立了基于状态方程的光伏系统仿真模型。通过仿真对比分析了扰动观测法、模糊控制策略、变步长控制策略和两阶段变步长控制策略,仿真结果表明两阶段变步长有良好的快速性和稳定性。最后搭建硬件实验平台,实验结果验证了所提控制策略的正确性。Through analysis photovoltaic mathematic model and photovoltaic output power and duty-ratio function relationship,a novel two stage variable step-size maximum power point tracking control strategy is proposed. The simulation model of photovoltaic system based on state equation is built up using Matlab/Simulink. By simulation model,perturb and observation,fuzzy control,common variable step-size,two stage variable step-size are compared,and simulation results indicate two stage variable step-size has quick respond and good stability. Finally,hardware experiment is set up,and the validity of the proposed method is verified by experimental results.

关 键 词：光伏 两阶段变步长 最大功率点跟踪 

分 类 号：TM914.4[电气工程—电力电子与电力传动]