Abstract
In order to protect environment and improve utilization efficiency of energy, district electricity and heating system has been well developed with the supportive policy. However, the coupling between electrical system and heating system brings challenges to the existed theories for energy system analysis. Energy network theory is proposed after an in-depth analysis of the nature of energy. The analysis of transfer process of electric energy, pressure energy and heat energy is proposed following rigorous mathematical derivation and analysis. Based on the energy network theory, the commonalities and characteristics of energy subnets are studied. Then, the energy network equations of district electricity and heating system are established. These equations are used for the modeling of a typical district electricity and heating system. A numerical case is analyzed by comparison between theoretical results and actual parameters, showing the validity of the energy network theory.
Published Version
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