中国电机工程学报Issue(9)：2152-2161,10.DOI:10.13334/j.0258-8013.pcsee.2015.09.007
MMC-HVDC联网及孤岛运行状态转换策略
Study on MMC-HVDC Switching Scheme Between Grid-Connected and Passive Islanding Mode
摘要
Abstract
ABSTRACT:It is effective to use modular multilevel converter based high voltage direct current (MMC-HVDC) and AC lines in parallel to supply power for important loads, and so MMC-HVDC needs to be able to switch steadily between grid-connected mode and islanding mode. The switch processes between grid-connected mode and islanding mode of MMC- HVDC were analyzed in this paper, and a local information based MMC control mode switching scheme was proposed. Besides, an MMC droop control scheme was derived by modifying the controller for supplying power to passive network, which can seamlessly switch between the above two modes. The two switching schemes were tested and compared by simulations on PSCAD. Results show that MMC can switch steadily between grid-connected mode and islanding mode through either of the two schemes. These two schemes have both advantages and disadvantages, and the MMC should choose proper schemes according to specific control objectives in practice.关键词
模块化多电平换流器型直流输电系统/联网/无源孤岛/锁相环/转换过程/转换策略Key words
modular multilevel converter based high voltage direct current (MMC-HVDC)/grid-connected/passive island/phase-locked loop/switching process/switching scheme分类
信息技术与安全科学引用本文复制引用
刘昇,徐政,唐庚,华文,张静..MMC-HVDC联网及孤岛运行状态转换策略[J].中国电机工程学报,2015,(9):2152-2161,10.基金项目
国家863高技术基金项目(2012AA050205)。 The National High Technology Research and Development of China (863 Program)(2012AA050205) （2012AA050205）
