摘要
励磁故障引起的发电机失磁,将影响电网电压水平和并联运行机组间无功功率的分配,破坏发电机与电网之间的稳定性。以励磁绕组开路失磁为例,利用M AT L A B/S i m u l i n k软件平台,对汽轮发电机失磁物理过程的动态特性进行仿真研究。研究结果表明:失磁故障时,降负荷至稳态异步越快,越有利于保障发电机的安全运行。
The excitation-loss, one of the commonest faults of the generator would influence power grid voltage level and reactive power distribution between the parallel generators to destroy the stability between power grid and generators. Taking the excitation-loss due to open-circuit of the excited welding as example, simulation on exci- tation-loss dynamic characteristic of turbo-generator was done by means of MATLAB/Simulink software platform. The result was that the quicker to decrease the load degree to stable asynchronous level, the safer the operation of the generator.
出处
《电机技术》
2015年第5期1-4,共4页
Electrical Machinery Technology
关键词
汽轮发电机
励磁系统
失磁故障
开路
turbo-generator
excitation system
exci-tation-loss fault
open-circuit
