Harmonics of the Component Formed by Pairs of Alternative Unitary Step, Symmetrical Regarding the Central Step of the PWM Inverter Output Voltage

The analytical approach of the output voltage of the PWM type inverter, from the composition of solar power plants, was possible by highlighting in the voltage oscillogram two types of waves: a step type voltage, alternative, centered on the middle of the alternation (AUS) and one of type pairs alternate unit steps, alternating, symmetrical to the central step (PAUS). The definition of these waves in relation to the functional quantities of pulse amplitude, conduction angles and priming delay angles led to the identification of their Fourier developments and then, on this basis, allowed the analytical determination of the optimal operating regimes of PWM inverters, and the possibility of establishing a convenient control principle. The paper deals with the harmonics of PUAS type components, which overlap with the central component, in order to reconstruct the real voltage wave, obtained by oscillation.