两级式三相光伏并网系统的MPPT控制策略  

MPPT Control Strategy in Two-stage Three-phase Photovoltaic Grid-connected System

作　　者：林顺富[1] 张铭[1] 王凯[1] 

机构地区：[1]上海电力学院电气工程学院,上海200090

出　　处：《上海电力学院学报》2014年第5期402-406,共5页Journal of Shanghai University of Electric Power

基　　金：国家自然科学基金(51207088);上海科学技术委员会科研计划项目(13DZ2251900);上海电力学院科创项目(K-2012-003)

摘　　要：基于Matlab/Simulink仿真建立了两级式三相光伏并网系统,以研究最大功率点跟踪(MPPT)控制策略.前级DC/DC变换器采用扰动观察法实现MPPT,后级逆变电路采取电压外环、电流内环的双闭环PI控制,以稳定直流母线电压,实现网侧电流的跟踪控制.仿真结果表明,采用的MPPT控制策略具有良好的动态响应性能,且能较好地稳定直流母线电压.A two-stage three-phase photovoltaic grid-connected simulation system is built based on Matlab/Simulink to study the maximum power point tracking （MPPT） strategy. The DC/DC converter adopts the perturbation method of observation to realize the MPPT control. The DC/AC inverter uses the voltage outer loop and current inner loop of the so-called double closed-loop PI control to stabilize the DC bus voltage and track the grid side current. The simulation results show that the adopted MPPT control method has a good dynamic response and is capable of stabilizing the DC bus voltage.

关 键 词：最大功率点跟踪 扰动观察法 双闭环PI控制 

分 类 号：TM615.2[电气工程—电力系统及自动化]