基于4QC理论的风力发电并网变流器控制系统研究

The Research and Development of the Grid-Connected Convertor in Wind Energy Generation System Based on 4QC Theory

风力发电是可再生能源中的主力军，具有环保性和可持续利用等优点。近年来，有关风力发电变流器的结构及控制方法已经成为国内外广泛研究和应用的热点，其性能的优劣对于风力发电及并网系统的运行效率和稳定性具有重要作用。分析了并网型风力发电系统中的三个典型主电路结构（包括：异步发电机并网主电路、双馈发电机并网主电路和同步发电机并网主电路），分析研究了各个主电路的工作原理、适用场合和性能特点；通过综合比较选择，确定了同步发电机并网主电路及系统总体构成方案。完成了系统的DsP控制软件设计与实验调试，软件编程采用模块化结构，主要包括：信号检测调理模块、SVPWM产生和输出模块、系统控制模块和键盘及显示管理模块等。通过大量的仿真研究和实验结果，证实了系统结构和控制方案的正确性与可行性。

Wind Power Generation possesses the most important position in renewable energy sources, which has the virtue of environmental protection and sustainable development. Researches on its structure and controlling methods are carried out a great deal of attention. The performance affects the whole system and the synchronization system＇s efficiency and stability. The structures of asynchronous generator＇s main circuit, Doubly-fed induction generator＇s main circuit and synchronous generator＇s main circuit are analyzed in this paper. At the same time, the operational principle, situation and performance are mentioned. According to comparison, the synchronous generator＇s main circuit is adopted as the system＇s main structure. The system＇s software design and test debugging are completed. The software is designed by modularization. It mainly include signal detect and conditioning model, SVPWM generation and output model, system control model, keyboard model and display model. After a great deal of simulation and test, the results show that the control strategy used is feasible, the system can perform good control effect and the control strategy is corrective and feasible.