Modelling and Control of an Autonomous Energetic System Obtained through Trigeneration

The autonomous energetic system is for a residential building and it has as primary sources exclusively renewable resources (biomass and solar energy). For obtaining electrical energy, photovoltaic sources and a Stirling engine are used. They operate simultaneously in 1:3 ratio – electrical/thermal energy. Solar collectors and a pellet boiler are used to cover the necessary of thermal energy. The air conditioning in the summer regime is obtained using an adsorption plant. The energetic deficit is critic in the electrical subsystem where the load control is done through the adjusting of the Stirling engine power. The thermal power of this engine is a disturbance variable at the level of the thermal subsystem. The paper deals with the developing of a mathematical model of the whole system. The paper also proposes a control solution for the load regulation in the electrical and thermal subsystems and it presents the results obtained through numerical simulation.