太平湾发电厂发电机励磁方式改造及实践应用

Transformation and Application of Generator Excitation System Mode in Taipingwan Power Plant

发电机励磁系统是保证其可靠运行的重要系统,应满足正常工况下维持机组电压静态稳定性,提高发电机动态稳定和暂态稳定,发电机事故时对转子绕组迅速灭磁要求,以保护发电机安全。介绍了太平湾发电厂机组励磁系统改造为具有励磁变压器的自并励系统的过程,阐述了改造必要性、相关设备选择、机组动态稳定计算和投运试验过程。

The generator excitation system is an important system to ensure the reliable operation of the generator.It should maintain the static stability of the unit voltage under normal conditions and to require quickly respond to the dynamic stability and transient stability of the generator.When the voltage disturbance of the power grid is disturbed,it quickly demagnetizes the rotor windings in order to protect the safety of the generator.This paper introduces the process of transforming the excitation system of the unit in Taiping Bay power plant from the indirect excitation system transformation with the DC exciter to the self shunt excitation system.It expounds the process of the transformation necessity,the selection of the related equipment,the dynamic stability calculation and the commissioning test of the unit.