220kV双母分段带旁路接线的断路器失灵保护分析

Failure Protection Analysis of Circuit Breaker of 220kV Sectionalized Double-bus Wiring Mode with Bypass Bus

为深入了解断路器失灵保护、提高变电站运行可靠性,针对大型变电站中接线方式最为复杂的双母分段带旁路主接线,按设备种类分析了每种设备断路器失灵保护的特点、启动原理和联跳主变三侧断路器原理、回路设计及应用情况,并提供了旁路带线路及主变断路器时应在失灵保护上特别关注的经验。

In order to understand the circuit breaker failure protection deeply and improve the reliability of substa- tions, aiming at the complex sectionalized double-bus wiring mode with bypass bus, the failure protection characteristics and star〉up principle of circuit breaker are analyzed based on the equipment types. The united jumping principle of the three side circuit breakers of main transformer, circuit design and application are also discussed. Some useful experiences of circuit breaker failure protection are supplied for bypass bus driving line and transformer circuit breaker.