燃气轮机组励磁系统设计与应用

The Design and Application of Excitation System for Gas Turbine Unit

燃气轮机组起动时,一般把发电机作为同步电动机运行,静止变频器通过改变电源频率改变定子旋转磁场速度,并通过控制励磁系统调整施加于转子上的磁通,共同作用实现对同步电动机转速的调节。本文以某电厂3×200MW燃气轮机组为依托,阐述了燃气轮机励磁系统的设计与应用。此电厂配置两台静止变频器控制三台燃气轮机组的起动,因此每套励磁系统需要与两台静止变频器进行通讯,且需要相互闭锁,在硬件及软件方面与常规励磁系统相比,有着其特殊配置。

For the start of the gas turbine unit, the generator usually runs as a synchronous motor. Static frequency convertor changes the speed of stator rotating magnetic field through altering power frequency. It also controls excitation system to regulate the magnetic flow of the rotor. They work together to realize the speed adjustment of synchronous motor. Depending on a power plant of 3＊200MW gas turbine unites, this paper states the design and application of excitation system for gas turbine. It was configured of two sets of static frequency convertor to control the three sets of gas turbine unites. So each excitation system needed to communication with two sets of static frequency convertor. And it required to work interlocked. Compared with the conventional excitation system, it has special configuration in the respect of hardware and software for the excitation system of gas turbine unites.