Presents a system capable of achieving optimal compensation (in real time) by elimination of differential current and employing power electronic controlled current sources. The functional block diagram and a description of the working principle are included. Simulation tests were carried out on current source and active compensation system. The results of simulation and experimental tests of prototype model of controlled current source and compensator confirm a considerable reduction of source current distortion at strong distortions of voltage and current of receiver, a fast response to step changes of load and good stability of its work.