Advanced modular design; Three-level topology; Compensate harmonic, reactive power, unbalanced load; Filtering efficiency> ... harmonics at the same time.Compensating times can be chosen, to make efficiency higher.3DSP+CPLD all-digital controlling method, making ... , Semiconductors, Capacitors are from Germany, USA and Japan.Can adapt to a range of -40%~20% voltage.Complete self-protection functions ...