固态限流器抑制轴系扭振的研究

电力系统故障会引起汽轮发电机组轴系的扭振,本文分析了在发生三相接地和单相接地故障情况下,固态限流器对提高发电机暂态稳定性和轴系扭振的影响.通过Matlab仿真计算电磁转矩、汽轮机轴系扭振和机端电压的变化,仿真结果表明固态限流器除了具有良好的限流功能外还能够提高电机暂态稳定性和抑制轴系扭振.

Suppressing Axial Torsion Vibrations on Turbine Shafts by Solid State Fault Current Limiter

Short circuit fault would result in considerably large torsion vibrations on steam turbine shafts. When a three phase grounded fault and a single phase to ground fault occur, the influence of solid state fault current limiter(SSFCL)on generator transient stability and torsion vibration is analyzed respectively. The analysis is performed in terms of electromagnetic torque, turbine shaft torque and terminal voltage curve using Matlab modeling. It is concluded that the SSFCL is effective for enhancement of generator transient stability and suppression of turbine shaft torsion vibrations as well as fault current limiting.