发电机机端三次谐波问题的分析与处理  

Analysis and Treatment for Generator TV Terminal Third Harmonic

作　　者：刘一丹[1] 袁宇波[1] 张量[1] 李子斌[2] 王红星[1] 

机构地区：[1]江苏省电力试验研究院有限公司,江苏南京210036 [2]张家港华兴电力有限公司,江苏张家港215600

出　　处：《江苏电机工程》2006年第1期42-44,共3页Jiangsu Electrical Engineering

摘　　要：在张家港华兴电厂第1台395MW燃气机组电气调试时,发现发电机机端电压互感器开口三角绕组出现很大的三次谐波电压,通过录波对机端电压互感器二次开口三角绕组三次谐波电压产生的原因进行分析,并通过MATLAB对电压互感器一次中性点接地和不接地两种不同情况进行仿真分析,进一步验证一次中性点不接地的电压互感器,消除三次谐波的方法是解决激磁电流中三次谐波流通的通道。为此在开口三角绕组加非线性阻尼以消除三次谐波,同时提出解决此问题的根本方法在于为机端电压互感器配置三角形绕组。The third harmonic voltage of generator terminal TV is measured during the electric commissioning of first gas turbine of Zhangjiagang Huaxing Power Plant.The reason for third harmonic voltage producing by recording wave is analyzed and treated. Simulating the neutral winding grounded and non-grounded with MATLAB could verify that the third harmonic voltage of TV second winding is reduced if the third harmonic of excitation current can flow out. So the non-linear resistance is connected on the triangular winding, at the same time it is suggested that the generator terminal TV of Huaxing Power Plant should be configured triangular windings.

关 键 词：发电机 电压互感器 三次谐波 激磁电流 

分 类 号：TM311[电气工程—电机]