现代电力2024，Vol.41Issue(4)：659-666,8.DOI:10.19725/j.cnki.1007-2322.2022.0266
抑制不同运行方式下故障电流的直流电网网架结构优化方法
DC Grid Topology Optimization for Fault Current Depression in Different Operation Modes
摘要
Abstract
The fault current level of a DC grid determines the cost of current limiting devices and the lifetime of converter components.The fault current can be effectively reduced by op-timizing the DC grid topology.However,the existing fault cur-rent level evaluation index of DC grid topology is inaccurate and fails to represent the comprehensive fault current level un-der different operation modes.In view of this,an optimal design method for DC grid topology is proposed to restrain fault currents under different operation modes.First,the calcu-lation method for short-circuit fault current in DC grids is presented.Then,a general representation of the grid topology is established based on graph theory,upon which the evaluation indices for fault current levels under normal operation mode and N-1 operation modes are proposed.Finally,an optimiza-tion method for DC grid topology is proposed considering the fault current levels under different operation modes.The effect-iveness of our method is validated through the simulation using a six-terminal DC grid in PSCAD/EMTDC.关键词
柔性直流输电/直流电网/网架结构/故障电流/运行方式/图论Key words
VSC-HVDC/DC grid/grid topology/fault current/operation mode/graph theory分类
信息技术与安全科学引用本文复制引用
王鹏宇,彭乔,毛光亮,刘天琪,印月,陈思危..抑制不同运行方式下故障电流的直流电网网架结构优化方法[J].现代电力,2024,41(4):659-666,8.基金项目
四川省科技厅国际港澳台科技创新合作项目(2022YFH0018) （2022YFH0018）
中央高校基本科研业务费专项资金(2021SCU12055).Science and Technology Department of Sichuan Province(2022YFH0018) （2021SCU12055）
Fundamental Research Funds for the Central Universities(2021SCU12055). （2021SCU12055）
