Hybrid energy flow calculation method for electric-thermal comprehensive energy system

Abstract

The invention discloses an electric-thermal integrated energy system mixed energy flow calculation method, which comprises the following steps of: obtaining a known state quantity of an electric-thermal integrated energy system mixed energy flow, and determining electric and thermal balance nodes of an electric-thermal integrated energy system; according to the structure of the thermal subsystem, establishing a thermal subsystem hydraulic and thermal working condition steady-state model considering the heat loss of a water supply pipe network and a water return pipe network; establishing an alternating current power flow model of the power subsystem according to the power parameters of the power subsystem; establishing a thermoelectric conversion model of the combined heat and power generation unit, and constructing an electric-thermal comprehensive energy system mixed energy flow model taking the combined heat and power generation unit as coupling equipment; and setting an initial value of a state quantity to be solved in the energy flow model of the electric-thermal integrated energy system, and decomposing and iteratively solving the mixed energy flow model of the electric-thermal integrated energy system by using a Newton-Raphson method. By means of the method, distribution of various energy flows in the electric-thermal comprehensive energy system can be calculated rapidly and accurately, and investment planning and regulation and control operation of the comprehensive energy system are facilitated.

Description

technical field [0001] The invention belongs to the field of electric-thermal integrated energy systems, and particularly relates to a hybrid energy flow calculation method of an electric-thermal integrated energy system. Background technique [0002] In order to cope with the increasingly severe shortage of fossil energy and environmental pollution, the energy Internet, which takes the power system as the core and the Internet and other cutting-edge information technologies as the basis, includes the coupling and complementation of various energy sources. The electricity-heat integrated energy system with cogeneration units, electric boilers, and heat pumps as coupling equipment is one of the important manifestations of the energy Internet, which realizes the conversion and interaction between electric energy and thermal energy in the system. As the main energy supply network in the integrated energy system, how to effectively calculate the distribution of multiple energy f...

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Problems solved by technology

In the research of the hybrid energy flow calculation of the electric-thermal integrated energy system, most of the existing common solution methods have problems such as large amount of calculation, high computer memory usage, and difficulty in dealing with the ring network.

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