主变压器断路器失灵保护回路与延时定值关系分析

Analysis on Ｒelationship between Circuit － breaker Failure Protection Loop of Main Transformer and Delay Time Settings

摘要:

变电站主变压器断路器失灵保护，由于其保护配置、二次回路接线方式的不同存在较大差异; 现场检修人员 和保护定值整定人员存在理解不到位的情况。从多种保护配置的方案出发，对比分析主变压器断路器失灵保护实现 的方式和特点，并详细探讨其中与失灵保护有关的延时定值整定问题。旨在理清主变压器中压侧断路器失灵回路的 特点，指导继电保护定值整定人员的工作。

Abstract:

There is a big difference in the circuit － breaker failure protection of main transformer in different substations due to the differences of protection configuration and connection mode of secondary circuit． Maintenance personnel in the field and protection value setting operators cannot understand the differences very well． The realization methods and characteristics of circuit － breaker failure protection of main transformer are analyzed and compared based on the variety of protection configuration schemes，and the setting delay of failure protection are discussed in detail，which can straighten the characteristics of failure protection loop and guide the setting work of relay protection．