Abstract

The deployment of DC islanded microgrids (DC ImGs) has grown alongside the increased use of renewable energy sources with DC output. Ensuring voltage stability in such networks is challenging, especially in the presence of exogenous disturbances and communication-induced time delays in measurement and actuation channels. This work develops a small-signal state-space model of a time-delay DC ImG composed of DC-DC boost-converter-based distributed generation units. Within a Linear Matrix Inequality (LMI) framework, two centralized controllers are synthesized: a stabilizing state-feedback law and a robust H-infinity controller that constrains the L2 gain from disturbances to selected outputs. Extensive simulations under load and input-voltage variations demonstrate that the robust controller significantly improves disturbance rejection and maintains acceptable voltage profiles despite sizable delays.

About the Speaker

Mr. Mohannad Ahmed is a Graduate Student in the Control and Instrumentation Engineering Department at King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia. He earned his bachelor's degree in Mechatronics Engineering from Taiz University, Yemen, in 2019. His research focuses on power system engineering.