The disclosure relates to a method for the scheduling and/or the operation of a system of at least two power supplies (11) providing DC pulses to a consumer (5), typically an electrostatic precipitator, wherein the power supplies (11) are energized by a common feeding (1). According to the proposed method one power supply (11) is defined to be the reference power supply, and the initial pulses of each further power supply (11) are shifted by controlled delays (δPri) with respect to the pulses of the reference power supply so as to fill the gaps between the pulses of the reference power supply by the pulses of the further power supplies (11).