Power Extraction Control of Variable Speed Wind Turbine Systems Based on Direct Drive Synchronous Generator in All Operating Regimes

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/jece/volume-2018/3837959/figures/3837959.fig.0016a.svgz" name="3837959.fig.0016a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Backstepping control</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/jece/volume-2018/3837959/figures/3837959.fig.0016b.svgz" name="3837959.fig.0016b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>VOC strategy</td></tr></table>

<div>Waveforms of three-phase voltage at Bus 4.</div>

Journal of Electrical and Computer Engineering

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Figure 16

Figure 16: Power Extraction Control of Variable Speed Wind Turbine Systems Based on Direct Drive Synchronous Generator in All Operating Regimes 