| ABSTRACT |
This project presents a new topology of three-level single phase photovoltaic (PV) inverter without transformer. It consists of three main circuits; they are a pulse driver circuit, a full bridge inverter circuit and a power factor correction circuit that have functions as production of pulse waves, to develop alternating current (AC) waveform and to stable voltage of PV array. Main energy source of the inverter without transformer is a PV array that consists of three unit PV modules, each unit has 81 V, 60 W. In this project, AC three-level waveform and square wave single phase inverter without transformer are developed and created by a microcontroller PIC16F627A-I/P which depend on weather condition. The result shows that the AC waveform which is formed by the PV inverter without transformer will effect on AC load rms voltage, AC current and current total harmonic distortion (CTHD), for a load of 20 W 220 V 50 Hz AC water pump, its AC load rms voltage and current are higher when the single phase PV inverter without transformer is formed as AC square wave than as AC three-level waveform, but the CTHD is lower when the single phase PV inverter without transformer is formed as AC three-level waveform than as AC square wave.
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