Method and system for establishing steady-state equivalent circuit of combined heat and power system

Abstract

The invention discloses a method and a system for establishing a steady-state equivalent circuit of a combined heat and power supply system. Equivalent treatment is carried out on a proton exchange membrane fuel cell stack which is a power supply and a heat source. A direct current is generated based on the proton exchange membrane fuel cell stack and is equivalent to a direct current source whichgenerates constant current. The heat energy taken away by the cooling system is positively correlated with the electric energy generated by the proton exchange membrane fuel cell stack, so that the heat flow is equivalent by a controlled voltage source, and the value of the controlled voltage source represents the initial temperature of the heat flow; and a relational expression between the constant current of the direct current source and the value of the controlled voltage source is established by using a data fitting method, so that an actual system can be completely mapped.

Description

technical field [0001] The invention belongs to the technical field of distributed energy supply, and in particular relates to a method and system for establishing a steady-state equivalent circuit of a cogeneration system. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] The energy and environmental crisis has prompted the transformation of traditional energy structure and the development of renewable energy. Among them, the integrated energy system is based on the principle of energy graded utilization, and performs multi-gradient utilization of thermal energy and electric energy. While meeting the needs of users for cooling, heating and power, it greatly improves energy utilization and becomes an important part of the future energy structure. [0004] The integrated energy system includes electric and thermal heterogeneous energy syste...

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Problems solved by technology

However, most of the existing thermoelectric homogenization methods stay at the level of energy flow, and the establishment of a unified model of one-way energy flow in an integrated energy system cannot represent a complete heat flow loop and a complete current loop. In short, the existing model is not a complete thermoelectric comparison, and the established The one-way energy flow model cannot fully map the relationship between electric energy and thermal energy in the actual combined heat and power system

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