Implementation of a Multi-Control Architecture in a Photovoltaic/ Grid/ Electrolysis System for Usual Use and Clean Storage by Hydrogen Production

Abstract

In this article, the authors proceed to the implementation of an architecture built on a platform of diversified control algorithms. These algorithms are designed to supervise a system that supplies an alternative load by using two sources of energy: photovoltaic (PV) as the main source and the national electric grid as an emergency source).The design of this system is developed by the authors around DC/DC converters in cascade (buck and boost), a DC/AC inverter and en electrolysis for the production of hydrogen as clean storage. Each converter is equipped with its own control algorithm (maximum power point tracking (MPPT) control for the buck and proportional–integral (PI) regulation of the boost). The electrolysisis, too, accompanied by a specific control guaranteeing optimum hydrogen production. For the DC/AC inverter, it is controlled by a conventional control strategy pulse width modulation (PWM Bipolar) to supply an alternative RL load. The electrical grid only intervenes in the last place to fill the energy deficit caused by the photovoltaic source.This assembly of these devices requires an efficient distribution of energy which is achieved by the development of a distribution algorithm toensure the supply of the load under all circumstances and the production of hydrogen when the photovoltaic energy is in excess.