An Improved Phase-Locked-Loop Control with Alternative Damping Factors for VSC Connected to Weak AC System

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/jcse/volume-2016/9537342/figures/9537342.fig.002a.svgz" name="9537342.fig.002a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Vector-current control model</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/jcse/volume-2016/9537342/figures/9537342.fig.002b.svgz" name="9537342.fig.002b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>The simplified model of PLL</td></tr></table>

<div>Control diagram of VSC connected to weak AC system.</div>

Journal of Control Science and Engineering

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Figure 2

Figure 2: An Improved Phase-Locked-Loop Control with Alternative Damping Factors for VSC Connected to Weak AC System 