Optimal Design and Two-Level Power Management of a Hybrid Energy System Based on The Simultaneous Production of Electricity and Heat

Today, the widespread presence of renewable production sources alongside non-renewable production sources along with energy storage devices as a hybrid energy system has solved many problems of energy production and storage units in power systems. Optimum power management to increase reliability and continuous supply of load is one of the basic challenges of these systems. Therefore, according to the existence of the main and backup systems, it is necessary to use an optimal power management strategy that fits the system structure. In this article, in addition to designing and optimizing the dimensions of the system, a power management strategy suitable for the structure of the hybrid energy system is proposed with various goals, such as providing electric and thermal load, optimizing the dimensions of the system, reducing the costs of construction, production and operation and increasing the penetration rate of renewable resources is presented in order to reduce environmental pollution. For this purpose, the mathematical model of the system components and the formulation of electric and thermal power have been done, and the multi-objective cost function with several technical and economic constraints has been minimized with the help of particle swarm optimization. The efficiency of the designed energy management strategy has been analyzed using the weather information of Shiraz city, and the appropriate performance of the system has been shown in the continuous supply of electrical and thermal load in different scenarios. As can be seen, the amount of costs for the heating system and fuel cell has decreased to $1200,000.