Application and Analysis of Automatic Tuning Arc Suppression Coil in Power Grid

This paper describes the importance of auto-tuned arc suppression coil in power grid operation. Compared with the traditional arc suppression coil which relied on manual adjustment, automatic tracking arc suppression coil is convenient to adjust and accurate to select the gear during operation. It can avoid the formation of series resonance with full compensation after line tripping and overcome the previous shortcomings [1]. Through theoretical analysis, the addition of damping resistance can reduce the neutral point displacement voltage, and the suitable damping resistance value is calculated theoretically, and applied in practical cases, so that the neutral point voltage of 66kV north bus line of DD 220kV substation can be reduced to the ideal value, eliminating the false grounding, system resonance and other faults caused by excessive neutral point displacement voltage, and improving the power supply quality. It also provides a reference for the wide application of auto-tuned arc suppression coil in power grid.