This device is a new power electronic device used to improve power quality in transformer areas. The device features a built-in reactive power generator (SVG, APF), utilizing intelligent algorithms for control. It effectively compensates for three-phase load imbalance and includes functions such as rapid and continuous reactive power regulation and active filtering, offering excellent filtering performance for characteristic harmonics. It demonstrates superior performance in compensating for three-phase imbalance, reactive power, harmonics, and voltage sag.