同杆线路故障引起主变低后备保护动作分析

Analysis of a Transformer Low Voltage Backup Protection Action Caused by Line Fault on the Same Tower

结合一起10 kV同杆双回线路故障引起的主变低后备保护动作实例,分析了事故原因及保护动作过程,探讨了电气元件之间的保护配合关系及其对电气元件继电保护选择性的影响,并提出了相应的防范措施,为今后预防此类可能发生的故障提供了参考。

Combined with an example of low voltage backup protection action of main transformer caused by 10 kV double circuit line fault on the same tower,the accident causes and protection action process are analyzed in depth,and the protection coordination relationship between electrical components and its influence on Relay Protection Selectivity of electrical components are analyzed in detail.The corresponding preventive measures are put forward to provide reference for the prevention of similar situations that may occur in the future.