基于傅里叶变换的汽轮机转子转速控制研究  

Research on Turbine Rotor Dpeed Control based on Fourier Transform

作　　者：刘影 陈贵刚 景致远 谢驰 LIU Ying;CHENG Guigang;JING Zhiyuan;XIE Chi(School of Mechanical and Electrical Engineering,University of Electronic Science and Technology ofChina,Chengdu,Sichuan 611731;Chengdu JinCheng College,Chengdu,Sichuan 610065)

机构地区：[1]电子科技大学机械与电气工程学院,四川成都611731 [2]成都锦城学院,四川成都610065

出　　处：《绵阳师范学院学报》2023年第8期1-5,12,共6页Journal of Mianyang Teachers＇ College

基　　金：四川省自然科学基金项目(2022NSFSC0900).

摘　　要：配电网中的次同步振荡会对汽轮发电机中的转子转速产生影响.通过傅里叶分析方法计算得出配电网中次同步振荡频率,在汽轮发电机的转子转速控制系统中通过调节励磁系统中锁相环的频率合成,减小励磁电流的波动,实现对汽轮发电机的转子转矩控制.仿真结果表明,在电网出现短时扰动时,汽轮发电机的转速没有出现大波动,实现了对次同步振荡的有效抑制.The subsynchronous oscillation in power grid affects the rotor speed of turbo generator.In this paper,the frequency of subsynchronous oscillation was calculated by Fourier analysis method.Rotor speed regulation of turbo generator was controlled by excitation system which was effected by the value of electromagnetic impedance.The fluctuation of excitation current was reduced by adjusting the frequency synthesis of the phase-locked loop in the excitation system to achieve the rotor torque control.The simulation results showed that the speed of the turbo generator did not fluctuate greatly when the power grid was disturbed in a short time,and the subsynchronous oscillation was effectively suppressed.

关 键 词：汽轮发电机 傅里叶分析 次同步振荡 转子 

分 类 号：TM715[电气工程—电力系统及自动化]