中国电机工程学报2015，Vol.35Issue(11)：2670-2680,后插5,12.DOI:10.13334/j.0258-8013.pcsee.2015.11.005
模块化多电平换流器型高压直流输电系统停运控制策略研究
Shut-down Control Scheme for Modular Multilevel Converter Based HVDC
摘要
Abstract
In order to discharge the sub-module (SM) capacitor rapidly and reliably in the shut-down stage, this paper proposed a complete shut-down control scheme for modular multilevel converter based high-voltage direct current (MMC-HVDC) transmission systems. According to the discharge mechanism, the shut-down control scheme is divided into three parts: the energy feedback stage, the controllable energy dissipation stage and the uncontrollable energy dissipation stage. In the energy feedback stage, the SM capacitor voltage is reduced by increasing the modulation indexm, activating the third harmonic injection, adjusting the converter transformer tap and inserting the redundant SMs. Therefore, some part of the SM capacitor energy can be fed back into the connected ac systems. In the controllable energy dissipation stage, the SM capacitor energy is consumed by the dc line or by the start-up resistor. In the uncontrollable energy dissipation stage, the SM capacitor is discharged through the SM internal resistor. The case studies were performed on a two-terminal 400 MW/±200 kV MMC-HVDC system in PSCAD/EMTDC. The time domain simulation results validate the efficiency and effectiveness of the proposed shut-down control scheme.关键词
模块化多电平换流器/高压直流输电/停运控制/能量反馈/能量耗散/直流线路/启动电阻Key words
modular multilevel converter (MMC)/high-voltage direct current (HVDC)/shut-down control/energy feedback/energy dissipation/dc line/start-up resistor分类
信息技术与安全科学引用本文复制引用
张哲任,徐政,许烽,薛英林..模块化多电平换流器型高压直流输电系统停运控制策略研究[J].中国电机工程学报,2015,35(11):2670-2680,后插5,12.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）
