Nonlinear Second-Order Model and Equilibrium Point Characteristic Analysis of DC Traction Power Supply System

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="981692.fig.001a" src="https://static.hindawi.com/articles/isrn/volume-2013/981692/figures/981692.fig.001a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>  Short-circuit fault current</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="981692.fig.001b" src="https://static.hindawi.com/articles/isrn/volume-2013/981692/figures/981692.fig.001b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Low-frequency oscillation current</td></tr></table></td></tr></table>

<table>Transient current waveform of traction network.</table>

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Figure 1

Figure 1: Nonlinear Second-Order Model and Equilibrium Point Characteristic Analysis of DC Traction Power Supply System 