Research on Discretization PI Control Technology of Single-Phase Grid-Connected Inverter with LCL Filter

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="129619.fig.009a" src="https://static.hindawi.com/articles/mpe/volume-2014/129619/figures/129619.fig.009a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Without filtering</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="129619.fig.009b" src="https://static.hindawi.com/articles/mpe/volume-2014/129619/figures/129619.fig.009b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>After 5 kHz low-pass filter</td></tr></table></td></tr></table>

<table>The experiment waves with 750 Hz.</table>

Mathematical Problems in Engineering

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Figure 9

Figure 9: Research on Discretization PI Control Technology of Single-Phase Grid-Connected Inverter with LCL Filter 