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直流输电系统用SF6密度继电器风险分析

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具有保护和控制作用的SF6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,SF6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 SF6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SF6绝缘设备的SF6低压闭锁保护判据提出了改进建议,供业内人士参考.
Risk Analysis of SF6 Density Monitor Relay in HVDC System
SF6 density relays with protection and control functions are widely used in AC/DC transmission systems.Due to the differences in the principle of fault cutoff in AC/DC transmission systems,the risk of abnormal operation of SF6 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 SF6 density relay at the moment of connection with external gas circuit are ana-lyzed,and experimental verification is conducted.Suggestions for improving the SF6 pressure low blocking protection cri-terion of SF6 insulation equipment in DC transmission systems have been proposed for industry reference.

HVDCSF6 insulationdensity monitor relay

谢超、李乾坤、钱景笙

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中国南方电网公司超高压输电公司广州局,广东广州 510663

上海建材工业设计研究院,上海 200041

高压直流输电 SF6绝缘 密度继电器

2024

仪表技术
上海市仪器仪表学会,上海仪器仪表研究所等

仪表技术

影响因子:0.217
ISSN:1006-2394
年,卷(期):2024.(2)
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