基于PWM交交变频器的分频风电系统研究  

Research on fractional frequency wind power system based on PWM cycloconvertor

作　　者：苏匀 李少华[2] 王秀丽[2] 张望 郭宏光 

机构地区：[1]许继电气股份有限公司,河南许昌461000 [2]西安交通大学电气工程学院,陕西西安710049

出　　处：《电力系统保护与控制》2015年第13期86-91,共6页Power System Protection and Control

摘　　要：传统相控式交交变频器由于采用电网换相方式,电源侧功率因数较低,在实际应用中需要加装各种无功补偿装置。应用IGBT全控型器件和PWM技术并利用Matlab的Simulink环境搭建了一种新型的交交变频器——PWM交交变频器,该变频器使工频电源侧电压与电流的位移因数提高到接近1,因而大大提高了电源侧的功率因数。同时把该变频器应用于柔性分频输电系统中,并模拟了一回200 km/110 k V输电线路。仿真表明其输送容量大于90 MW,相对于工频交流输电系统容量大大提高;变频器的位移因数提高到1,网侧的功率因数得到了大大改善,达到了0.9以上。因此PWM交交变频器大大改善了系统性能,尤其是工频侧的功率因数。Conventional phase-controlled cycloconvertor, due to using line commutation method, its power factor is rather low in grid side, various reactive power compensation devices should be used in practice application. This paper designs a Pulse Width Modulation （PWM） cycloconvertor using full-controlled device Insulated Gate Bipolar Transistor （IGBT）. A simulation model built by using the Matlab/Simulink software is supplied, the power factor is greatly improved by displacement factor, which is almost 1. The results of the simulations show that Fractional Frequency Wind Power System （FFWPS） based on PWM cycloconvertor can remarkably increase transmission capacity, for a 200 krn/ll0 kV transmission line can transfer as much as 90 MW electric power. Therefore, FFWPS system greatly increases transmission capacity that demonstrates its great potential of application. Performance of FFFTS is improved especially the power system＇s power factor, which is above 0.9.

关 键 词：PWM交交变频器 分频风电系统 功率因数 IGBT SIMULINK 

分 类 号：TM614[电气工程—电力系统及自动化] TM921.51