The paper proposes a Lyapunov based approach for assessing the local stability of current self-control strategies for PFC Boost converters subject to load variations. Lyapunov stability conditions are cast in terms of state-dependent linear matrix inequality constraints which are numerically solved via semidefinite solver packages. Numerical simulations and practical experiments are considered to validate the proposed approach.

The objective of this paper is to present a power conversion system, based on a bidirectional DC/DC converter, along with a supercapacitor bank, that mitigates the voltage transients that occur on the DC distribution network of More/All Electric Aircrafts. These transients, such as voltage sags and swells appear on the DC buses of on-board microgrids, mainly due to load variations and are classified according to the aircrafts electric power system standards. First, we shortly describe an aircraft distribution network, that is applicable to the most common actual aircraft architectures, then we present the proposed system, along with the bidirectional DC/DC converter design, the control technique and the supercapacitor bank sizing. Finally, we present simulation and experimental results that support the effectiveness of the proposed system to effectively compensate voltage transients, supporting the DC buses in dynamic conditions. Concluding, the proposed system provides high power quality and compliance with the respective power quality standards for aircraft microgrids.

This work presents a Power Electronics solution for an all-electric passenger boat. The proposed system is constructed with building blocks comprising interleaved half-bridge converters employing interphase transformer and Gallium Nitride FET semiconductors. The system employs two multi-level drives and an integrated harbor and onboard PV system. The PV battery charger has two stages. One converter per PV panel and a second based on cascaded buck-boost converters that control the battery current and adapts the voltage levels. The operation, control and design expressions are presented. Finally, experimental results verify the feasibility of the proposed system.

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