Abstract
The most modern technical systems are an integration of various energy converters and sources of various physical nature. Mechanical, thermal, electromagnetic, as well as computer (information) monitoring and control system. Multi-energy systems (MES) also belong to the class of such technical devices. The main task in creating mathematical models is a methodological approach that allows joint modelling of 6 energy objects of various nature on a single methodological basis. The article considers the main approaches to the mathematical description of MES, as well as the assumptions and stages of formation for modelling this class of technical systems. The main advantages and disadvantages of the proposed methods for creating mathematical models are considered taking into account the possibility of using optimization methods and using the above models as digital twins for control systems. In addition, the article will present a methodological approach to the formation of mathematical models of an integrated energy system based on the concept of an energy hub using MATLAB.
Highlights
An energy hub [1]-[5] is an intermediate link between energy producers, transport infrastructure and consumers on the other hand (Figure 1)
In order to take into account energy storage devices, we introduce an additional coupling matrix for them:
The diagonal matrix formed by the impedance of the energy flow of each branch of the converter is defined as the impedance matrix of the branch flow
Summary
An energy hub [1]-[5] is an intermediate link between energy producers, transport infrastructure and consumers on the other hand (Figure 1). A thermal power plant can convert gas into heat and electricity. Inputs - energy flows directly from producers or from the transport infrastructure system (fossil fuels, wind, solar energy, electricity, etc.). 2. Converters - responsible for the modification of energy resources, or for changing the physical parameters of energy resources (boiler room, chiller, heat pump, electric transformer, etc.). 3. Storage (storage, battery) is used to store fuel reserves, energy storage (for example, heat storage, electricity storage, gas tank, coal storage, etc.). 4. Exits - flows of energy resources that come from the hub to consumers (heat, cold, electricity, etc.).
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