中文摘要：

以船用推进为背景，对一种带直流均衡电抗器的12脉波整流系统网侧谐波电流表达式进行了推导及简化。综合考虑了变压器交流输入端漏感、整流输出端均衡电抗器、变频器直流输入电压等因素，对其与电网电流总谐波畸变及输入功率因数的关系进行了分析和仿真，仿真与试验表明：计算与实际情况具有较高的吻合度。该方法尤其适用于对系统参数匹配性敏感的特殊船舶应用领域。。

英文摘要：

An expression of line-side harmonic current for 12 pulse rectifier system with DC equilibri- um reactor is deduced and simplified on the background of ship propulsion. The relationships of the total harmonic distortion of the grid current and the input power factor are analyzed and simulated with the consideration of such factors as leakage inductance of transformer AC input, equilibrium reactor of rectifier output, inverter DC input voltage, etc. The simulation and experiment results show that the compute results agree well with the actual situation. This method is particularly suitable for special marine applications which are sensitive to system parameters matching.