三相光伏并网发电系统的控制研究  

Control schemes for grid-connected three-phase photovoltaic power systems

作　　者：鲍鹏[1] 王奔[1] 邹超[1] 范冕[2] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031 [2]国网武汉高压研究院,湖北武汉430074

出　　处：《华东电力》2008年第12期39-42,共4页East China Electric Power

摘　　要：介绍了三相光伏并网发电系统的工作原理,阐述了扰动观测法(P&O)实现最大功率跟踪控制(MPPT)的基本思想。对并网逆变器在d-q坐标系下的数学模型,采用逆系统方法进行线性化解耦,构造出伪线性系统。然后,运用变结构控制方法,设计出这个伪线性系统的变结构控制律。仿真结果表明该方法能够有效地控制并网电流波形趋于正弦波,并跟踪系统电压的相位,同时使系统具有较好的稳定性。The working principle of the three-phase photovoltaic system is presented, as well as the basic theory to realize maximum power point tracking （MPPT） by the perturb ＆ observer algorithm （P＆O）. Based on the system model of the grid-connected inverter in the d-q- coordinate system, the inverse-system method was used to linearize and decouples the original system to build a pseudo-linear system. Then the variable structure control （VSC） theory was adopted to design the VSC laws of this pseudo-linear system. Simulation results show that the control method can effectively make the grid-connected current display rough sine waveform and track the phases of the grid voltage. Meanwhile, it enables the system to be more reliable.

关 键 词：光伏并网系统 最大功率跟踪控制 逆系统方法 变结构控制 

分 类 号：TM615[电气工程—电力系统及自动化]