变频变压器在风电并网过程中的频率调整研究  

Research on frequency adjustment of variable frequency transformer in grid-connecled wind farms

作　　者：张敏[1] 凌云[1] 唐黄正 

机构地区：[1]湖南科技大学信息与电气工程学院,湖南湘潭411201

出　　处：《湖南科技大学学报（自然科学版）》2017年第1期18-23,共6页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：湖南教育厅重点科学研究项目(13A021)

摘　　要：变频变压器(variable frequency transformer,VFT)是一种串联型的灵活交流输电系统设备,也是一种新型智能电网设备.在过去几十年里,我国风力发电是增长最快的新兴可再生能源,但是对于风电并网时的电力系统频率稳定问题也引起了广泛的关注.本文介绍了VFT调节频率的基本原理和转子转速控制设计,并在PSCAD/EMDTC中构建了VFT与风电场的仿真互联模型,进行了对风电并网的仿真实验,着重分析了VFT稳定频率和调节频率的作用.结果表明VFT可以在风电并网中显著提高系统的暂态稳定水平,从而提高风电场的发电能力.Variable frequency transformer（VFI＇） is a series of flexible AC transmission system equipment, and it also is a new type of smart grid equipment. Over the past few decades, wind power in China is the fastest- growing emerging renewable energy, however, the problem of frequency stability of power system in the grid- connected wind farms is also caused wide attention. The basic principle of VFT adjust the frequency and the design of rotor speed control was introduced, and the simulation model of VFT and wind farm was built in PSCAD/EMDTC, the simulation experiment of the grid-connected wind farms was carried out, the effect of VFT on stabilizing frequency and adjusting frequency was emphatically analyzed. The results show that VF＇F improve the transient stability level of the system and increase the Dower ~en^ratian ~~rtn~,~it,,r

关 键 词：变频变压器(VFT) 风电并网 频率调整 转子转速控制 

分 类 号：TM761[电气工程—电力系统及自动化]