Robust AC Voltage Regulation of Microgrids in Islanded Mode with Sinusoidal Internal Model

Abstract

: This paper shows that the H ∞ control is an effective tool for electric voltage regulation. We here consider robust AC voltage regulation of microgrids in an islanded mode. When a microgrid is disconnected from a utility grid, it automatically switches to an islanded mode to provide necessary power using a battery system until the grid is recovered.In the islanded mode, it is important to regulate the electric voltage generated in the grid to track a predetermined AC voltage reference. A difficulty is that there exits unmodeled dynamics in the grid that may cause large power fluctuations.To resolve this problem, we adapt the H ∞ control with a sinusoidal internal model to robust AC voltage regulation in microgrids. Simulation and experimental results confirm that the proposed H ∞ control can achieve robust tracking performance.

Regression Monte Carlo for microgrid management

“…In this kind of systems, the uncertainty of both, the load and the renewable production is high and its negative effect on the system stability can be mitigated by including a battery energy storage system in the microgrid. Energy storage devices ensure power quality, including frequency and voltage regulation (see Hayashi et al (2017)) and provide backup power in case of any contingency. A dispatchable unit in the form of diesel generator is also used as a backup solution and to provide baseload power.…”