电网技术2016，Vol.40Issue(9)：2795-2802,8.DOI:10.13335/j.1000-3673.pst.2016.09.030
LCC型双端直流中引出并联FB-MMC功率分支站的混合型多端直流输电系统
Hybrid Multi-Terminal Integration of Parallel FB-MMC Tapping Station into LCC-HVDC Transmission Link
李少华 1王秀丽 1彭忠 2李泰 2王建华3
作者信息
- 1. 西安交通大学 电气工程学院，陕西省 西安市 710049
- 2. 许继电气股份有限公司，河南省 许昌市 461000
- 3. 厦门大学 嘉庚学院，福建省 漳州市 363105
- 折叠
摘要
Abstract
Tapping bulk HVDC links to serve intermediate loads or to pick uprenewable energy resources always presents formidabletechnical and economic challenges to system designers. Itisseen as quite difficult, and so is DC current coordination between multi-terminals. In order to solve this problem, a novel hybrid HVDC system with full bridge modular multilevel converter (FB-MMC) based tapping station is proposed.Control and coordination strategies for tapping station are investigatedemphatically.Firstly,coordination for 3-terminal hybrid systemis put forward which is moreconcise comparedtoline commutated converter based 3-terminal system.Secondly,on premise of being capable of operating under lower DC voltage with over modulation and free from effect of AC voltage drop, DC fault ride-through strategy and control method of FB-MMC station are improved. Finally, using PSCAD/EMTDCmodels, three cases,i.e.DC fault, power reversal and AC system fault at tapping station,are studied.Compared with line commutated converter based 3-terminal system, simulation results indicate that the proposed scheme can simplify coordination between terminals, optimize overall system performance and is more favorable for resisting AC voltage drop.关键词
混合直流输电系统/并联支路站/全桥模块化多电平换流器/直流故障清除/协调控制Key words
hybrid HVDC system/parallel tapping station/full bridge modular multilevel converter/DC fault clearing/coordination control分类
信息技术与安全科学引用本文复制引用
李少华,王秀丽,彭忠,李泰,王建华..LCC型双端直流中引出并联FB-MMC功率分支站的混合型多端直流输电系统[J].电网技术,2016,40(9):2795-2802,8.
