Higher harmonics and limiting thereof in power supply systems of different voltages

Abstract

Abstract The simulation of the modes of power supply systems of different voltages, with a transformer carrying linear and non-linear loads and a capacitor bank, has been implemented. The dependences of the capacitors overload by current and the coefficient of harmonic voltage components on the capacitor bank capacity within the operating range of the transformer total load by linear and non-linear loads have been obtained. For the systems under consideration, upon a daily variation in the capacitor bank linear load and capacity, it is virtually impossible to eliminate the capacitors overload by higher harmonic currents and observe regulatory voltage quality requirements. Anti-resonant chokes installation in the capacitor bank circuits reduces the overload of capacitors to a permissible value, and brings up the coefficient of harmonic voltage components to values that took place in the absence of the capacitor bank.