燃气轮发电机SFC启动时的铁磁谐振仿真分析  

Simulation Analysis on Ferroresonance of Gas Turbine Generator During SFC Start-Up

作　　者：陈财 吴义纯[1,2] 田彦 门富媛[1,2] 程琳 CHEN Cai;WU Yichun;TIAN Yan;MEN Fuyuan;CHENG Lin(Anhui Electrical Engineering Professional Technique College,Hefei 230051,China;Training Centre of State Grid Anhui Electric Power Co.,Ltd.,Hefei 230022,China)

机构地区：[1]安徽电气工程职业技术学院,安徽合肥230051 [2]国网安徽省电力有限公司培训中心,安徽合肥230022

出　　处：《安徽电气工程职业技术学院学报》2019年第3期14-18,共5页Journal of Anhui Electrical Engineering Professional Technique College

基　　金：安徽高校自然科学研究重点项目(项目编号:KJ2018A0852)

摘　　要：燃气轮发电机经静止变频器(SFC)启动时,发电机出口所连电压互感器(PT)可能会与系统对地电容在某些频率下相匹配而发生铁磁谐振。文章根据某热电厂实测数据,利用MATLAB搭建燃气轮发电机组SFC启动仿真模型,明确了发电机实际启动过程,经仿真验证,该厂燃气轮发电机在SFC启动过程中不会发生铁磁谐振。文章还仿真分析了PT励磁特性、系统对地电容及PT铁耗电阻对铁磁谐振的影响。The potential transformer(PT)connected to the generator outlet may match the capacitance to ground at certain frequencies when the gas turbine generator is started by the static frequency converter(SFC),resulting in ferromagnetic resonance.In this paper,the measured data of a thermal power plant is used to build the SFC start-up simulation model of the gas turbine generator set with the MATLAB,and the actual starting process of the generator is clarified.The results clarify that the ferromagnetic resonance will not happen during the process.Besides,the effects of PT excitation characteristics,system capacitance to ground and PT iron loss resistance on ferromagnetic resonance are also simulated and analyzed in this paper.

关 键 词：燃气轮发电机 静止变频器(SFC) PT 铁磁谐振 

分 类 号：TM743[电气工程—电力系统及自动化]