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基于混合式MMC的混合高压直流输电系统启动策略
引用本文:赵文强,高得力,马云龙,杨建明,王永平,卢宇.基于混合式MMC的混合高压直流输电系统启动策略[J].电力系统自动化,2018,42(7):62-70.
作者姓名:赵文强  高得力  马云龙  杨建明  王永平  卢宇
作者单位:南京南瑞继保电气有限公司, 江苏省南京市 211102,国网北京经济技术研究院有限公司, 北京市 100052,国家电网公司直流建设分公司, 北京市 100052,南京南瑞继保电气有限公司, 江苏省南京市 211102,南京南瑞继保电气有限公司, 江苏省南京市 211102,南京南瑞继保电气有限公司, 江苏省南京市 211102; 南瑞集团(国网电力科学研究院)有限公司, 江苏省南京市 211106
基金项目:国家电网公司科技项目“适应全球能源互联网发展的混合型直流输电及其规划技术研究”
摘    要:针对与有源系统相联的混合直流输电系统,以全桥子模块和半桥子模块混合的模块化多电平换流器(MMC)为例,详细分析了其预充电启动过程,给出了每个阶段直流电压的一般数学表达式,从数学上证明了其与半桥子模块或全桥子模块构成的MMC的内在联系。分析了基于全桥子模块和半桥子模块混合的MMC在不同混合比例下其预充电过程中可能存在的过压或欠压问题,提出了5种解决措施。同时就混合直流输电系统运用于向无源系统供电和作为"黑启动"电源的应用场合,分析了其预充电启动过程,并提出了具体实现方法。最后通过PSCAD/EMTDC对相关分析进行了仿真验证。

关 键 词:半桥子模块  全桥子模块  模块化多电平换流器  预充电  高压直流输电
收稿时间:2017/9/20 0:00:00
修稿时间:2018/3/1 0:00:00

Startup Strategy of Hybrid HVDC Transmission System Based on Hybrid MMC
ZHAO Wenqiang,GAO Deli,MA Yunlong,YANG Jianming,WANG Yongping and LU Yu.Startup Strategy of Hybrid HVDC Transmission System Based on Hybrid MMC[J].Automation of Electric Power Systems,2018,42(7):62-70.
Authors:ZHAO Wenqiang  GAO Deli  MA Yunlong  YANG Jianming  WANG Yongping and LU Yu
Affiliation:NR Electric Co. Ltd., Nanjing 211102, China,State Grid Economic and Technological Research Institute Co. Ltd., Beijing 100052, China,DC Construction Branch of State Grid Corporation of China, Beijing 100052, China,NR Electric Co. Ltd., Nanjing 211102, China,NR Electric Co. Ltd., Nanjing 211102, China and NR Electric Co. Ltd., Nanjing 211102, China; NARI Group Corporation(State Grid Electric Power Research Institute), Nanjing 211106, China
Abstract:For a hybrid high voltage direct current(HVDC)transmission system connected to the active power grid, the pre-charging and start-up process of the half-bridge sub-module and full-bridge sub-module based hybrid modular multilevel converter(MMC)is analyzed in detail. The general mathematical expressions of DC voltage in each stage are derived, and the internal relation between the hybrid MMC and the MMC composed of half-bridge sub-module or the full-bridge sub-module is justified mathematically. The over-voltage and under-voltage problems in the pre-charging process for the hybrid MMC under the different mix proportions are analyzed, and five feasible measures are proposed. Meanwhile, for the hybrid HVDC applied to the passive system and the application for black start, the pre-charging and start-up process are analyzed, and the concrete implementation method is proposed. Finally, the proposed strategy is verified by PSCAD/EMTDC simulation.
Keywords:half-bridge sub-module  full-bridge sub-module  modular multilevel converter(MMC)  pre-charging  high voltage direct current(HVDC)
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