Synchronous Adjustment of Three Modulated Inverters of Grid- Tied Photovoltaic Installation

- This paper presents analysis and comparison of three variants of the modified scheme and techniques of space-vector-based synchronous pulsewidth modulation (PWM), appli-ed for control of three diode clamped inverters of transformer-based photovoltaic (PV) installation, and focused on assuring of the symmetry of winding voltage of power transformer during the whole control diapason. Power supply of inverters is insuring by the corresponding three solar strings consisting of a set of PV panels, and the outputs of three inverters are connected specifi-cally with inverter-side windings of multi-winding grid-tired tra-nsformer. Results of simulation prove the fact of advanced spect-ral composition of the winding voltage of PV installation with triple inverters regulated by algorithms of synchronous space-ve-ctor PWM, assuring potential reduction of losses in these systems.