高压直流系统中励磁涌流对交流滤波器电阻器影响作用机理分析与研究

Mechanism Analysis and Research on Effect of Excitation Inrush Current on AC filter Resistor in HVDC System

分析了高压直流系统中励磁涌流引起的交流滤波器电阻器过负荷问题,通过仿真方式,重现了某换流站换流变充电过程中滤波器保护动作过程,分析了励磁涌流引起交流滤波器电阻器过负荷的作用机理。同时通过仿真计算,提出了在考虑励磁涌流条件下的电阻器能量要求及换流站换流变充电过程中应采取的措施,以确保充电成功。

In this paper, the overload problem of AC filter resistor caused by inrush current in HVDC system is analyzed. By simulation, the process of filter protection action during the charging process of the converter transformer in a converter station is reproduced. The mechanism of the overload of AC filter resistor caused by inrush current is analyzed. At the same time, through the simulation calculation, the energy requirements of the resistor under the condition of excitation inrush current and the suggested measures to be taken in the charging process of the converter transformer in the converter station are put forward to ensure the successful charging.