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| 摘要: |
| 气体绝缘开关装置(GIS)已广泛应用于城市供电网中。阐述了导线参数、GIS参数、雷电侵入波模型及参数、避雷器参数以及电气设备参数等的设置,运用ATP-EMTP搭建雷电侵入波作用下的架空线与电缆进线相连、包括架空线与电缆连接处安装的避雷器和部分电气设备(GIS、变压器)在内的单相简化模型,仿真计算断路器不同状态下,不同电缆长度的电缆末、首端雷电过电压。总结了电缆末、首端雷电过电压比值与电缆长度之间的关系,通过具体仿真表明,当电缆长度大于70 m时,仅电缆首端装设避雷器已经无法满足保护要求,需要考虑在GIS内部配置避雷器。 |
| 关键词: GIS,雷电过电压,雷电侵入波,避雷器 |
| DOI： |
| 分类号:TM643 |
| 基金项目: |
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| Lightning over-voltage at ends of inlet cable in 110 kV GIS substation |
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DING Chen ZHENG Jian-yong XIANG Ling
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| Abstract: |
| GIS(Gas Insulated Switchgear) is widely used in urban power network.The parameter setting of cable,GIS,model of lightning inrush surge,arrester and electrical equipments are expatiated.With ATP-EMTP,a single-phase simplified model under lightning intrusion is built for the connection section of overhead line and cable,including arrester,GIS and transformer.The lightning over-voltages at both ends of the cable are simulated for different circuit breaker states and cable lengths.Relationships between the over-voltage ratio of both ends and the cable length are analyzed.Simulation results show that,when the cable length is over 70 m,the arrester installed only at the farther end of cable can not meet requirements of protection,another arrester installed in GIS is necessary. |
| Key words: GIS,lightning over-voltage,lightning inrush surge,arrester |
