基于H-MMC的直驱式永磁同步风力发电系统的运行与控制  

Operation and control of direct-drive permanent magnet synchronous wind power generation system based on H-MMC

作　　者：荣飞[1] 严家俊 孙文隆 黄守道[1] RONG Fei;YAN Jiajun;SUN Wenlong;HUANG Shoudao(College of Electrical and Information Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学电气与信息工程学院

出　　处：《电力自动化设备》2020年第1期38-45,共8页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51977070)~~

摘　　要：提出了一种基于六边形模块化多电平交交变流器(H-MMC)的直驱式永磁同步风力发电系统,可以将三相风力发电机通过一级交交变换后直接并入三相交流电网,具有功率损耗低、变流器电容电压纹波小、无升压变压器并网的优点。详细分析了该系统的功率特性及变流器子模块电容电压波动的情况,提出了基于环流控制的电容电压平衡控制和基于双比例谐振控制器的电流跟踪控制,最终实现了风力发电机最大功率点跟踪下系统的稳定运行。MATLAB/Simulink仿真和RT-LAB硬件在环实验结果验证了基于H-MMC的风电系统具有良好的稳态运行特性和动态响应特性。A topology of direct-drive permanent magnet synchronous wind power generation system based on H-MMC(Hexagonal Modular Multilevel Converter)is proposed,which can connect the wind turbine and the AC grid with one stage converter and has the advantages of low power losses,low ripple of capacitor voltage and transformerless grid connection.The power characteristics of the system and the voltage fluctuation of arm capacitors are analyzed in detail,and the capacitor voltage balance control by regulating loop current and the current tracking control based on double proportional resonant controller are proposed to achieve the stable operation of system under the maximum power point tracking of wind turbine.The MATLAB/Simulink simulations and RT-LAB hardware in loop experiments verify that the wind power generation system based on H-MMC has good steady state operation and dynamic response characteristics.

关 键 词：风电 直驱式 H-MMC 电容电压平衡 双比例谐振控制器 

分 类 号：TM614[电气工程—电力系统及自动化]