Integrated energy system optimization method and system based on energy storage

Abstract

The invention provides an integrated energy system optimization method and system based on energy storage. The optimization method comprises the following steps: establishing a prediction model of renewable energy output and a prediction model of user load; obtaining predicted values of renewable energy output and user load through the prediction models; establishing an operation optimization model of an integrated energy system by taking the minimum daily operation cost as a target function, and setting equipment parameters and conditions of the integrated energy system by utilizing the predicted values; and carrying out solving through an operation optimization model to obtain equipment output and equipment state parameters. According to the integrated energy system optimization method and system based on energy storage, the energy supply and demand and energy flow coupling relationship is accurately matched, the requirements of multiple types of energy such as cold, heat and electricity on the user side are fully met, multi-energy complement is promoted, and sustainable development of resources is achieved. The system comprises a first storage tank, a second storage tank, a third storage tank, a heat supply device, a cold supply device, a compressor unit, an expansion unit, a cooler, a reheater and a cold storage device. Therefore, multi-energy complement is promoted, and energy peak load shifting related to multiple types of energy can be achieved.

Description

technical field [0001] The invention relates to the technical field of energy utilization, in particular to an energy storage-based comprehensive energy system optimization method and system thereof. Background technique [0002] In the context of the increasing proportion of the electricity market, the development of renewable energy is becoming increasingly important. However, the power generation of renewable energy is affected by weather conditions and day-night cycles. The inherent intermittency and volatility pose severe challenges to the safe and stable operation of the power grid and affect the ability of the power grid to accept renewable energy power generation. [0003] As a key link in the integrated energy system, large-scale energy storage technology provides an effective solution for the integration of renewable energy into the grid. Among them, liquid air energy storage with high energy storage density, no geographical restrictions, and flexible and effectiv...

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Problems solved by technology

[0006] The present invention provides an energy storage-based comprehensive energy system optimization method and its system, which are used to solve the problem that the heat of compression is not fully utilized in the prior art, and the energy supply mode is single, which cannot meet the requirements of the comprehensive energy system for supplying various types of energy. Defects in demand, to alleviate the problem of energy shortage, so as to achieve higher system performance

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