电气技术2024，Vol.25Issue(3)：74-78,5.
多端直流输电工程大地-金属回线转换策略
Strategy of conversion between ground return and metallic return in multi-terminal high voltage direct current transmission system
赵倩 1张群1
作者信息
- 1. 许继电气股份有限公司,河南 许昌 461000
- 折叠
摘要
Abstract
In view of the problem that the metallic return transfer break(MRTB)protection acts in the process of ground-metallic return conversion at different power levels in the first conventional multi-terminal high voltage DC transmission system in China,which leads to switch rejection and ground-metallic return conversion failure,this paper analyzes the current loop in the process of ground-metallic return conversion.The mathematical expressions of each converter station current are deduced when earth and metal loop coexist.On the basis of these expressions,the reason of MRTB operation failure is obtained and the improvement strategies and operation suggestions are proposed to provide a reference for engineering design and operation maintenance.Finally,the correctness of the analysis conclusion is verified by the simulation,which shows that the proposed strategies has the engineering application promotion value.关键词
多端直流/大地回线/金属回线/转换开关保护/回路分析Key words
multi-terminal high voltage DC system/ground return/metallic return/transfer breaker protect/circuit analysis引用本文复制引用
赵倩,张群..多端直流输电工程大地-金属回线转换策略[J].电气技术,2024,25(3):74-78,5.
