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| 摘要: |
| 针对上河变电所几次500kV隔离开关操作引起的操作电源的端子箱400V熔丝熔断事故，进行了现场试验，试验结果表明，开关操作时由于500kV串内连接线和400V电源线间存在电容耦合，在操作电源供电母线上有较高的感应电压存在，为降低感应电压，提出了铺设屏蔽电缆或暂时在电源母线上并联电容器的解决方案。 |
| 关键词: 上河变电所 500kV隔离开关 操作 感应过电压 事故分析 电弧放电 |
| DOI： |
| 分类号:TM63 TM564.1 |
| 基金项目: |
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| Overvoltage incident due to 500 kV isolator operation in Shanghe substation |
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LI Chang-yi WEI Xu ZHANG Jin-song
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| Abstract: |
| Since the terminal box of400V operating power-supply had fused several times due to500kV isolator operation in Shanghe substation,site tests were made.The test results indicate that,because of the capacitive coupling between500kV high voltage line and400V power-supply line,high voltage was induced on the power-supply line during the isolator operation.To reduce the inductive voltage,shield cable is proposed,or connecting parallel capacitor to power-supply line temporarily. |
| Key words: isolator,inductive voltage,arc discharge |
