| 摘要: |
| 分析了现有的绝缘子闪络快速监测系统的动作过程及存在的问题。提出了2种改进的监测系统，这2种系统分别通过绝缘子电流的有效值和瞬时值进行闪络判断，当所选增益调整电路的调整倍数和Rogowski线圈的互感满足一定关系时，2种监测系统均能成功避免绝缘子泄漏电流带来的负面影响；2种系统均增加了防信号过冲功能以及自动复归功能。当选择合适的电流定值时，所提的2种监测系统亦可实现绝缘子闪络预警功能，为绝缘子状态诊断提供参考。 |
| 关键词: 闪络 监测 预警 状态诊断 基本RS触发器 Rogowski线圈 光耦 绝缘子 |
| DOI： |
| 分类号: |
| 基金项目: |
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| Improved insulator flashover monitoring systems |
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LIU Zhixue
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Suzhou Department of Jiangsu Electric Power Maintenance Branch Company，Suzhou 215000，China
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| Abstract: |
| The performance of present insulator flashover rapid monitoring systems and its existing problems are analyzed. Two kinds of improved monitoring system are proposed，which monitor respectively the RMS and instantaneous values of insulator current for the detection of flashover. When the relationship between the adjustment multiple of gain adjustment circuit and the mutual inductance of Rogowski coil satisfies a certain condition，the harmful impact caused by the insulator leakage current to the monitoring systems can be successfully avoided. The automatic-reset function and the anti-signal-overshoot function are added to the improved systems. The flashover warning function can be implemented in the improved systems if suitable current setting is configured，which is useful for the insulator state diagnosis. |
| Key words: flashover monitoring warning state diagnosis fundamental RS trigger Rogowski coil optical coupler electric insulators |
