摘要
从理论上分析了直流转换开关的开断电流特点。考虑直流开断电流和输电线路参数,分别建立金属回路转换开关(metallic return transfer breaker,MRTB)、大地回路转换开关(ground return transfer switch,GRTS)和中性母线开关(neutral bus switch,NBS)等直流转换开关在各运行工况下的仿真模型,对以上3类开关直流电流转换过程进行计算分析。结果显示,各开关开断2次电流时,避雷器吸收能量分别为10.9 MJ、4.4 MJ和4.2 MJ。可据此来合理配置避雷器参数和数量,保证系统安全可靠运行。
The DC transfer switch＇s switching current feature is theoretically analyzed. Considering DC switching current and transmission line parameters,the simulation model for metallic return transfer breaker（ MRTB）,ground return transfer switch（ GRTS）and neutral bus switch（ NBS） are built in some operating conditions. The analysis is carried out on current switching process for the three models. Results show that while undergoing two current switchings,energy absorbed by the arresters are 10. 9 MJ,4. 4 MJ,and4. 2 MJ. These can be a reference in deploying the parameters and numbers of the arrester to assure the reliable operation of the system.
出处
《南方电网技术》
2014年第4期33-36,共4页
Southern Power System Technology
