直流输电换流站交流滤波器稳态额定值研究

根据交流滤波器定值模型 ,计算滤波器各个组成元件在滤波器阻抗与一定范围内系统谐波阻抗并联谐振时的电压和电流。计算采用阻抗圆的方法来模拟系统阻抗 ,且考虑换流器产生的谐波电流和背景谐波共同的影响。计算表明 ,12、2 4次特征谐波及 3次非特征谐波在谐波电流中占主要成分 ,且背景谐波对选取滤波器元件参数影响很大。

AC Filter Steady State Rating in HVDC Converter Station

According to the AC filter steady state rating model, the values of voltage and current of components of AC filter are calculated when resonance occur because the filter impedance is parallel with the AC system harmonic impedance. During the calculation, the AC system harmonic is simulated by network impedance sector and both the harmonic current contributed from converter harmonics and background harmonics should be considered. The results of calculation indicate that, the 12 th, 24 th characteristic harmonics and the 3rd non-characteristic harmonics are the main part of harmonic current, and background harmonics has significant effect on the parameters of components of AC filter.