电力系统自动化Issue(11)：51-57,7.DOI:10.7500/AEPS20140707004
模块化多电平柔性直流输电系统的启动策略
A Startup Strategy for Modular Multilevel Converter Based HVDC System
华文 1赵晓明 1黄晓明 1申斌 1李勇 1李继红2
作者信息
- 1. 国网浙江省电力公司电力科学研究院，浙江省杭州市 310014
- 2. 国网浙江省电力公司，浙江省杭州市 310007
- 折叠
摘要
Abstract
The charging procedure of a modular multilevel converter(MMC) based HVDC(MMC-HVDC) system with valve-side grounded and ungrounded is analyzed.According to their different charging circuits,the steady DC voltage and the total voltage of the sub-module belonging to one arm is calculated.A strategy for modulated wave pre-tracking is proposed,i.e., realizing tracking of the modulated wave and valve-side voltage prior to deblocking as a preparation for minimizing the inrush current.The mechanism of the inrush current is analyzed,and the corresponding deblocking strategy is designed for the DC voltage control station and the constant power control station.By the active charging mode,the voltage of sub-module is increased,which can remarkably reduce the inrush current brought about during deblocking.A digital model for the MMC-HVDC system with two terminals is finally realized by the PSCAD software,the simulation results showing that the proposed control strategies have satisfactory performance.关键词
柔性直流/不控充电/主动充电/冲击电流/启动策略Key words
HVDC flexible/passive charging/active charging/inrush current/startup strategy引用本文复制引用
华文,赵晓明,黄晓明,申斌,李勇,李继红..模块化多电平柔性直流输电系统的启动策略[J].电力系统自动化,2015,(11):51-57,7.
