Day-to-day steady state optimization analysis method for an integrated energy system under the participation of energy storage

Abstract

The invention discloses a day-to-day steady state optimization analysis method for an integrated energy system under the participation of energy storage. The method designs energy hubs and energy coupling methods based on multiple types of load requirements. On the basis of energy hubs, the energy station model structure of coupled electric heat, gas, and cold steam subsystems is proposed. Then, the electric energy in the integrated energy system separately. Steady-state mathematical model of gas-cooled steam system are established; and the influence of storage, heat storage and cold storage on the integrated steady-state energy system of grid-connected operation is analyzed; secondly, electricity-containing heat and gas cooling under different load structures are established. The steady-state nonlinear optimization model of the steam subsystem is in the past; the final example analysis verifies the effectiveness of the steady-state optimization calculation and steady-state operation analysis of the integrated energy system. The invention mainly solves the problem of insufficient coordination of various subsystems in the current integrated energy system, and the method can reasonably reflect the operational characteristics of the integrated energy system.

Description

technical field [0001] The invention belongs to the optimization, scheduling, and steady-state calculation and analysis of an integrated energy system, and specifically relates to a method for analyzing a day-ahead steady-state optimization of an integrated energy system with the participation of energy storage. Background technique [0002] Relying on the continuous innovation of energy transmission technology, energy conversion equipment and renewable energy and other related technologies, the integrated energy system is conducive to the realization of multi-energy coordinated supply and comprehensive energy cascade utilization. It has become one of the important development trends in the energy field. The mutual coupling of multiple energy sources is one of the important signs that distinguish the integrated energy system from the traditional energy system. The differences in the characteristics of various energy sources pose new challenges to the planning and operation o...

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Problems solved by technology

[0005] At present, there are few literatures that consider the key characteristic variables of various energy subsystems, and study the steady-state optimization of integrated energy systems involving electricity-heat-gas-cooling-steam subsystems and heat storage, cold storage, and power storage. , the existing research mainly focuses on the optimization analysis of electricity-thermal coupling system, electricity-gas coupling system, electricity-heat-gas coupling system and combined cooling, heating and power system based on energy flow, without fully considering the participation of photovoltaic and wind power. Next, considering the key characteristic variables of the current steady-state optimization operation mode of the comprehensive energy system including energy storage, electricity-heat-gas-cooling-steam sub-system, the steady-state optimization model established to optimize the comprehensive energy system is not discussed Validity and Applicability of Calculations and Steady-State Operational Analysis

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