两级式三相并网光伏发电系统参数选择及控制研究

Study on the Control of Three-phase Two-stage GCPV Generation System and the Selection of its Parameters

本文研究了两级式三相并网光伏发电系统，给出了系统主要参数选取的原则，并根据典型I型和Ⅱ型系统设计原则进行ACR和AVR的参数整定，实现了并网控制。由于两级的存在，在前级控制升压变化器实现最大功率跟踪，后级控制逆变器实现并网，两级相对独立，便于系统容量扩展。最后运用Matlab／Simulink对设计的系统进行了仿真验证，结果表明此系统并网电能质量符合GB／T14549-1993标准。

Three-phase grid-connected photovoltaic generation system with two-stage has been researched in this paper, in which the selection principle of the main parameters in the system is available, and parameters of ACR and AVR are adjusted based on the typical I and typical II system design principles and thus grid-connected control is realized. Owing to the two-stage where the maximum power tracking is achieved in the first stage, and grid-connected is achieved via controlling inverter in the second stage, and the independence of the two-stage, the system has a great expansion capability. Finally, the system is proved to be well agreed with GB/T 14549-1993 by numerical simulations.