Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back The active power filter with a common DC link and a control system based on the relay control voltage V.N. MESHCHERYAKOV М.М. KHABIBULLIN The growth of non-linear loads among electricity consumers resulted in a higher harmonic components and deterioration of the quality of electricity. For compensation of harmonic distortion in the system of power supply it is proposed to use active power filter (APF) with control system on the basis of the relay of the current regulator and the common DC link between the inverter and rectifier load. Shows the theoretical description of the operation APF. In Matlab 8.1 software environment model APFwith the proposed control system and a common link, DC. From the results of computer simulation follows that the total level of harmonic components in the current consumption does not exceed 3%. Load current of the same phase with the voltage of the network, i.e. consumption load of reactive power from the electricity network is minimal. An experimental study of the system based control relay of the current regulator and findings presented. Keywords: non-linear load, power quality, total harmonic distortion, relay control current, active power filter. Contacts: E-mail: mesherek@stu.lipetsk.ru Pp. 26-33.