Test of GRID-connected inverter

Fig. 6a is the battery voltage and a phase current waveform, and the figure 6b is a phase voltage and current waveform diagram. Figure 6c is the spectrum of the output current. The experimental results show that the output current of the inverter is a stable sine wave under the condition that the battery voltage is stable, and it is opposite to the voltage phase of the power grid, thus the unit power factor is transmitted to power. Inverter output Current frequency is basically 50Hz. Harmonic content reached the grid-connected requirements.