Application of Multipoint DC Voltage Control in  VSC-MTDC System

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="257387.fig.009a" src="https://static.hindawi.com/articles/jece/volume-2013/257387/figures/257387.fig.009a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>  Active power of VSC1, VSC2, and VSC3</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="257387.fig.009b" src="https://static.hindawi.com/articles/jece/volume-2013/257387/figures/257387.fig.009b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b> DC voltage of current converter</td></tr></table></td></tr><tr class="fig-image" id="c"><td><img alt="257387.fig.009c" src="https://static.hindawi.com/articles/jece/volume-2013/257387/figures/257387.fig.009c.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(c) </b> AC bus voltage of VSC2 and VSC4</td></tr></table></td></tr></table>

<table> Permanent loss of VSC1 under condition of injecting active power into DC side.</table>

Journal of Electrical and Computer Engineering

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Figure 9

Figure 9: Application of Multipoint DC Voltage Control in  VSC-MTDC System 