Large-Signal Stability Improvement of DC-DC Converters in DC Microgrid

In DC microgrids, constant power loads (CPLs) reduce the effective damping of DC-DC converter and may induce destabilizing effects into converter. To overcome such problems regarding CPL ensure large-signal stability converters in some feedforward terms are added to $V$ - notation="LaTeX">$I$ droop-based dual-loop controller for a based on model. It is proven that can not only improve transient response but also guarantee exponential closed-loop system whole operating range regards manner, which verified by using singular perturbation Moreover, disturbance observer designed estimate output current, thereby enabling removal current measurement sensor. The proposed technique be easily plugged pre-defined without an additional sensor being required. Ultimately, both simulation experimental tests verify effectiveness method.