光伏单相并网逆变器分析  

Study on single-phase photovoltaic grid-connected inverter

作　　者：蒋强[1] 何都益[1] 张小英[1] 杨济豪[1] 

机构地区：[1]乐山师范学院物理与电子工程学院,四川乐山614000

出　　处：《电源技术》2015年第10期2212-2214,共3页Chinese Journal of Power Sources

基　　金：乐山师范学院科研启动项目(Z1253)

摘　　要：针对光伏电池的固有特性,采用光伏电池输出的直流电流作为并网逆变器控制的参考电流峰值,且参考电流的相位和频率以电网瞬时相位和频率为基准。引入了电网电压前馈和滤波器电容电流反馈控制方法,实现了向电网输出最多且稳定可靠的电能的目的。详细分析了光伏电池最大功率跟踪控制机理,并利用Matlab/Simulink软件仿真验证了并网电流控制系统根轨迹以及系统闭环极点。仿真结果表明:电路拓扑结构和控制方法确保了系统的稳定性和可行性。最后,通过实验验证了针对单相光伏系统设计的主电路拓扑结构及其控制方法的可行性。The Photovoltaic（-PV） grid inverter was analyzed, and the power transmission characteristics of photovoltaic cells with the photovoltaic grid inverter was combined to control the solar battery power transmission. Then a reference method of transient current was proposed, in which the photovoltaic battery power tracked and controled the maximum output current. This instantaneous exchange reference on the output current photovoltaic battery was the peak dc current, voltage phase and frequency of the instantaneous exchange was a reference current phase and frequency.At the same time, in order to ensure the stability and reliability of the connected inverter, the feed-forward control of grid voltage and the feedback control of the filter capacitance current were introduced. Finally,the feasibility of the proposed principle and control policy were verified through the simulation and experimental results.

关 键 词：光伏系统 单相逆变器 最大电流 LCL 电压前馈补偿 

分 类 号：TM464[电气工程—电器]