Finite-Time Large Signal Stabilization for High Power DC Microgrids With Exact Offsetting of Destabilizing Effects

The interleaved dual boost converter (IDBC) is a promising topology to interface high power solar photovoltaic (PV) generation or energy storage systems dc microgrids (MGs). It provides ratio for voltage transformations and helps significantly reduce ripples in the currents drawn from sources. However, conventional control methods of IDBC cannot guarantee system stability presence tightly regulated rapidly varying electronic loads which behave as constant (CPLs). Moreover, uncertainties may further affect MGs. In this context, large signal stabilization scheme, comprises finite-time observers (FTOs) controller (FTC), proposed. By considering CPLs parameter dispersions disturbances, FTOs are able precisely observe disturbances finite time. Then FTC exactly offsets estimated values stabilizes all states at their designated points doing so, can be obtained corresponding results proved with Lyapunov theorems. A detailed selection guideline provided practical applications. Simulations show that proposed method gives wider margin than PI (proportional-integral) control. Furthermore, experiments verify its effectiveness feasibility.