静止变频器系统变压器短路阻抗的算法研究

Algorithm Study of System Transformer Short Circuit Impedance in Static Frequency Converter

文中通过对静止变频器(SFC)系统的研究,提出一种新的变压器短路阻抗计算方法。该方法利用直流电压和晶闸管换相时间,计算变压器短路阻抗。并在江苏某抽水蓄能电站SFC上通过实验验证该方法的正确性,结果表明,该方法计算精度高,方便实用,有较高的应用价值。该方法还适用于直流输电系统、励磁系统中变压器短路阻抗的计算。

Through the study of Static Frequency Converter（SFC）,a new method is proposed to calculate the short circuit impedance of transformer based on the direct voltage and commutated time of thyristor.Besides,experiment was carried out on the static frequency converter in a pumped storage plant of Jiangsu province,verifying the correctness of this method.The test result indicates that the practical method has high precision and the process is convenient,with high application value.The method is also fit for that of HVDC system and excitation system.