混合三端直流输电系统应用于风电场并网的研究  

A study of wind farm connection based on hybrid three-terminal HVDC system

作　　者：陈鹏[1] 刘继春[1] 余熙 李嘉逸 张胜飞 吴磊[1] 李松[1] 

机构地区：[1]四川大学电气信息学院智能电网四川省重点实验室,四川成都610065 [2]西南电力设计院系统规划中心,四川成都610065

出　　处：《可再生能源》2015年第3期357-362,共6页Renewable Energy Resources

基　　金：国家教育部留学归国人员科研启动基金(教外司留[2011]1139号)

摘　　要：电压源型换流器的高压直流输电系统在风电场并网中可以提高其电能质量,但两端均为电压源型变换器换流器,其建设成本高。文章基于电流源型换流器的传统两端双极直流输电基础上,在直流端并联一电压源型整流器,构成混合三端双极直流输电系统,将电压源型整流器用于实现风电场并网。在仿真程序PSCAD/EMTDC中搭建该三端系统模型,并用一双馈感应风力发电机等效风电场出力,仿真结果表明,该混合三端双极直流输电系统可以实现风电场的并网,对风速变化响应特性好,可保证风电场出力的电能质量。Voltage source converter based high voltage direct current（VSC-HVDC） transmission system can increase the power quality of grid-connected wind farm.However, it will cost too much to build a VSC-HVDC transmission system which both sides are VSC.In this paper, a VSC rectifier is shunted at the DC side of traditional two-terminal bipolar HVDC transmission system which is based on current source converter, thus, a hybrid three-terminal bipolar HVDC is constructed and the VSC rectifier would connect a wind farm to the grid.A three-terminal system is built in PSCAD / EMTDC, in this system, the wind farm is replaced by a doubly-fed induction generator.The simulation results indicate that proposed three-terminal bipolar HVDC system can connect a wind farm to the grid with high power quality and has a good characteristic of response on wind speed changes.

关 键 词：风电场 电能质量 电压源型换流器 混合三端双极直流输电 

分 类 号：TM615[电气工程—电力系统及自动化]