Active power balance adjustment and reactive compensation method and device

An active power balance adjustment and reactive compensation method and a device are provided. The method and the device are characterized in that an AB line-line active power balance adjustment intelligent capacitor Cab, a BC line-line active power balance adjustment intelligent capacitor Cbc and a CA line-line active power balance adjustment intelligent capacitor Cca are added on the basis of a common-compensation reactive power compensation intelligent capacitor and phase-A, phase-B and phase-C separate-compensation reactive power compensation intelligent capacitors, and the intelligent capacitors are connected by a bus. With the method and the device, active power balance adjustment can be achieved in addition to a common reactive compensation function. The utilization rate and safety of transformers are improved, and the line loss is reduced.