摘要
为了计算气体绝缘变电站 (GIS)内由开关操作等对二次设备产生的传导干扰 ,必须建立电压互感器、电流互感器的高频模型 (f≥ 10MHz) ,提出了通过拟和TV/TA传输函数的幅度平方函数得到该传输函数的新方法 ,并建立了某GIS电站内 170kV感应式TV从 1MHz到 6 0MHz高频传输函数模型。拟和方法采用了运算速度快、拟和结果准确。
For an accurate simulation of the voltage stress in secondary circuits caused by very fast transients (VFT)in gas insulated substation (GIS),a sophisticated model of the inductive potential and current transformers (TV/TA)is of vital importance In this paper,we present a high frequency transfer function model of the potential transformer in GIS The model's set up is based on the frequency response from 1MHz to 60MHz which was obtained by testing We use rational function consisting of real poles as well as complex conjugate poles and zeros to approximated the frequency response A new fitting method based on vector fitting to fit the frequency response only based on the magnitude frequency characteristics of the TV is proposed
出处
《电工技术杂志》
2002年第12期26-28,共3页
Electrotechnical Journal
