Active power filter (APF) control is a natural area of application for vibrating reference frame (VRF) transformation due to the intentional occurrence of higher harmonics in the active filter current compensating load current harmonics. Due to the vibrating frame transfor-mation, the APF current can be represented by the DC values, and thus proportional-integral (PI) controllers are sufficient to control the converter current. However, in the typical approach it may be impossible to combine harmonic filtration with reactive power compensa-tion features, due to the transformation constraints. The solution of this issue is decoupling of the fundamental harmonic and high har-monic components, and separate control of each of them. This paper presents a decoupled control system of an active power filter, which uses VRF transformation for accurate control of high current harmonics. Decoupling is groundbreaking improvement of the VRF method. Moreover, different current limitation scenarios are proposed, taking into account both harmonics compensation and fundamen-tal frequency reactive current compensation. Theoretical considerations are supported by simulation and experimental tests.