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| 摘要: |
| 介绍江苏利港电厂3号励磁变压器爆炸事故的经过。通过解体分析,长期的高温运行,变压器绝缘老化是变压器故障的原因;变压器过流速断保护出口配置不合理是故障范围扩大、设备损坏严重的原因。通过计算短路电流,证明了励磁变压器过流速断保护和发变组大差保护(287GMT)动作的正确性。 |
| 关键词: 励磁变压器,故障分析,短路电流计算 |
| DOI： |
| 分类号:TM621.6 |
| 基金项目: |
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| Fault analysis and short circuit current calculation of exciting transformer |
|
GUO Jian
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| Abstract: |
| An exciting transformer fault of Ligang Power Plant is introduced.By decomposition analy-sis,the long-term operation under high temperature,which resulted in insulator aging,was the main cause,while the improper output configuration of its instantaneous over-current relay could not prevent it from serious damage.The action correctness of the instantaneous over-current relay of exciting transformer and the generator-transformer differential protection(287GMT )was verified by the short circuit current calculation. |
| Key words: exciting transformer,fault analysis,short circuit current calculation, |
