多端柔性直流输电系统在风电场中的应用.pdf

第 33 卷 第 4 期 电 网 技 术 Vol. 33 No. 4 2009 年 2 月 Power System Technology Feb. 2009 文章编号：1000-3673 （2009 ）04-0022-06 中图分类号：TM761 ；TM721.1 文献标志码：A 学科代码：470⋅4047 多端柔性直流输电系统在风电场中的应用 吴俊宏，艾芊 (上海交通大学 电气工程系，上海市 徐汇区 200030) Research on Multiterminal VSC-HVDC System for Wind-Farms WU Jun-hong ，AI Qian （Department of Electrical Engineering ，Shanghai Jiaotong University ，Xuhui District ，Shanghai 200030，China ） ABSTRACT: The voltage source converter (VSC) based 点直流电压控制 multiterminal VSC-HVDC power transmission system 0 引言 (VSC-MTDC) is an ideal approach to connect wind farm with power grid. Analyzing the output characteristics of wind farm 作为可再生能源，风力发电以其可开发容 equipped with doubly fed induction generators as well as the 量大、清洁等优点成为电力系统中增长最快的能 basic principle and control strategy of VSC-MTDC, a 源。截至 2007 年底，我国大陆已建成风电场 158 multiterminal DC voltage control strategy suitable to wind 个，累计安装风电机组 6 469 台，装机容量达到 farm connected with VSC-MTDC is proposed. By use of 5 906 MW 。但随着系统中风电场装机容量的不断增 PSCAD/EMTDC, the proposed control strategy is simulated, 加，交流并网的风电场对电网稳定和电能质量的影响 and simulation results show that using the proposed control strategy the conversion between constant power control mode 也越来越严重[1-4] 。随着电力电子技术的迅猛发展以 and constant DC voltage control mode can be automatically 及轻型直流输电技术或电压源换流器高压直流输电 implemented, thus the DC voltage stability control and reliable 技术(VSC-HVDC)的出现，人们开始研究基于 VSC- power output of wind farm can be ensured after the HV