Event driven Hybrid Bond Graph for Hybrid Renewable Energy Systems part I: Modelling and operating mode management

This paper proposes a generic tool named Event-Driven Hybrid Bond Graph (EDHBG). The main objective of the proposed approach is the use only one global model to represent all the distinct dynamics resulting from the switching behaviour of the system. Compared with classical approaches such as the hybrid automata, the Operating Mode Management (OMM) is more effective due to the separation between the continuous dynamics, represented by the BG continuous state, and the discrete state governed by a classical automaton. The innovative interest in this work is that it allows for a non-expert user to perform modelling without expressing the algebraic equations of the system and regardless of its hybrid aspect. The modelling approach is applied to Hybrid Renewable Energy Systems (HRES) represented by a multi-sources system which composed of Solar Photovoltaic Panels (PV) and Wind Turbine (WT) coupled with an EL to produce green hydrogen stored and when needed feeding a Fuel Cell (FC). A reduced size experimental HRES is presented to demonstrate the effectiveness of the proposed technique.