Energy flow simulation method based on transient model of electric-gas interconnection integrated energy system

Abstract

The invention discloses a method for simulating energy flow based on a transient model of a power-gas interconnection comprehensive energy system. The method comprises the following steps of 1) by considering dynamic characteristics of a slow process of a natural gas pipe network, building a transient model of the natural gas pipe network; 2) by adopting an implicit finite difference method, dividing a time-space partial differential equation for describing dynamic characteristics of gas flow of a natural gas pipeline into algebraic equation expressions; 3) coupling a power network and the natural gas pipe network through a gas turbine and a power-to-gas technology, and building the transient model of the system; 4) solving multi-time-period transient energy flow of the power-gas interconnection comprehensive energy system; and 5) performing performance testing in the comprehensive energy system. According to the method provided by the invention, the calculation precision is effectively improved and a real-time running state of a natural gas system can be described more accurately.

Description

technical field [0001] The invention relates to an energy flow simulation method for an electric power system and a natural gas system, which simulates the energy flow of an electric-gas interconnection comprehensive energy system, and belongs to the technical field of electric power systems. Background technique [0002] With the development of society, energy consumption continues to increase, and the ensuing problems of fossil energy shortage and environmental pollution cannot be ignored. As a clean energy, natural gas has the advantages of abundant reserves, high efficiency and environmental protection, and has been extensively developed around the world. Gas turbines are the traditional coupling elements of power systems and natural gas systems. With the rapid development of new gas turbines and combined cycle gas turbines, the connection between power systems and natural gas systems is becoming increasingly close. The power-to-gas technology that has emerged in recent...

AI Technical Summary

Problems solved by technology

Similar to power system power flow calculations, energy flow calculations are the basis for studying electricity-gas interconnected integrated energy systems. However, there are significant differences in dynamic time scales between power grids and gas networks. Currently, energy flow calculations for electricity-gas interconnected integrated The steady-state energy flow model of the natural gas system ignores the dynamic characteristics of the slow process of the natural gas pipeline network, which may cause the energy flow calculation results to deviate from the real operating state

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