Control Strategy of Inverter in Power Plant Based on a New Way of PV Module Operation

A power generating unit design including the choices of photovoltaic (PV) module and inverter based on the technical parameters of Grid-Connected PV power plant was proposed. Compare of statistics on solar radiation data of chosen engineering area in the typical year was analysed in RET Screen. Curve chart shows that the operation mode can obviously improve the PV module's ability to utilize the sun light. A dual-closed loops voltage space vector control strategy whose output current and harmonics were simulated via Matlab/Simulink was designed. The current waveform has been obviously improved and the harmonics content meet the index requirements for current harmonic technique of grid-connected system. The photoelectric conversion efficiency has been further improved.