摘要
具有保护和控制作用的SF_6密度继电器被广泛应用于交直流输电系统,由于交直流输电系统在切断故障原理上存在差异,SF_6密度继电器的非正常动作风险在直流输电系统中明显高于交流输电系统,必须对其气体回路上的带电补气、气体测量等作业进行风险评估。分析了SF_6密度继电器在与外部气路连通瞬间的非正常动作所引起的风险,并加以试验验证;对直流输电系统SF_6绝缘设备的SF_6低压闭锁保护判据提出了改进建议,供业内人士参考。
SF density relays with protection and control functions are widely used in AC/DC transmission systems.Due to the dfferences in the principle of fault cutoff in AC/DC transmission systems,the risk of abnormal operation of SF,density relays is significantly higher in DC transmission systems than in AC transmission systems.Therefore,risk assessment must be conducted for live gas replenishment,gas measurement,and other operations on their gas circuits.The risks caused by abnormal operation of SF density relay at the moment of connection with external gas circuit are ana-lyzed,and experimental verification is conducted.Suggestions for improving the SF,pressure low blocking protection cri-terion of SF,insulation equipment in DC transmission systems have been proposed for industry reference.
作者
谢超
李乾坤
钱景笙
XIE Chao;LI Qiankun;QIAN Jingsheng(CSG EHV Power Transmission Company,GZ Bureau,Guangzhou 510663,China;Shanghai Building Materials Industry Design and Research Institute,Shanghai 200041,China)
出处
《仪表技术》
2024年第2期51-54,82,共5页
Instrumentation Technology
