浅析前湾燃气轮发电机继电保护配置及运行情况

Study on relay protection and its operational performance of Qianwan gas turbine generator

介绍了燃气轮发电机电气部分的特殊性,阐述了燃气机组特有的静止变频器的工作原理及保护配置,分析了专为机组变频启动所配置的低频过流和启停机保护的设计思想,并介绍了在机组运行的不同阶段,发电机保护的投退情况。对发电机机端电压互感器谐振、SFC故障、励磁系统参数不匹配等曾经引起机组启动失败的案例进行了分析和总结,提出一些解决方法,介绍了检修经验,提高了燃机电厂的电气检修水平。

This paper introduces the special electric part of gas turbine generator at first and presents the operational principle of SFC and its relay protection configuration.Then it analyses the design philosophy of low frequency over current and starting up protection relay.It also lists the different relays using time on various stage of generator running.At last,it focuses on the operational performance and ever-happened typical faults of gas turbine generator,such as PT resonance oscillation,SFC fault,parameter of field system not matching,etc.It puts forward some suitable measures and maintenance experiences,so as to improve the maintenance quality of gas turbine power plant.