500 kV高岭换流站换流变空载充电励磁涌流分析

介绍了500 kV高岭背靠背换流站换流变及其保护配置情况，结合现场录波数据并借助电磁暂态仿真程序PSCAD/EMTDC分析了该换流站空充变压器时的励磁涌流特点及其对变压器保护的影响，验证了合闸电阻对换流变空载充电励磁涌流的抑制效果，指出该站换流变励磁涌流水平较低，但由于换流变容量较大，励磁涌流衰减较慢，应考虑预防某些极端情况下励磁涌流导致的换流变保护误动问题。

Analysis on Energizing Inrush Current of No-Load Converter Transformer in 500 kV Gaoling Back-to-Back Converter Station

The configuration of 500kV Gaoling back-to-back converter station and its protection are presented. Combining with on-site recorded data and by means of electromagnetic transient simulation program PSCAD/EMTDC, the features of energizing inrush current of no-load converter transformer in this station and its impact on transformer protection are analyzed. Meanwhile, the suppression effect of closing resister on the energizing inrush current of no-load converter transformer is verified. It is pointed out that the energizing inrush current of no-load converter transformer in this substation is in low level, however due to the higher capacity of converter transformer, the inrush current attenuates slowly, so the misoperation prevention of converter transformer protection caused by energizing inrush current under some extreme cases should be taken into account.