Comprehensive energy electric/thermal hybrid energy storage configuration method considering battery life loss

Abstract

The invention discloses a comprehensive energy electric / thermal hybrid energy storage configuration method considering battery life loss. The method comprises the following steps: modeling the batterylife loss; establishing an energy storage-containing comprehensive energy system model consisting of an energy production unit, an energy conversion unit, an energy storage unit, an energy transmission unit and an energy consumption unit; taking the minimum annual value cost in the comprehensive energy planning period as a first objective function of the outer-layer planning model, and taking theminimum daily operation cost as a second objective function of the inner-layer optimization model; and solving the double-layer model to obtain a corresponding energy storage configuration scheme. According to the method, the capacity planning problem and the operation optimization problem of the system under the energy storage planning capacity are considered, and quantitative evaluation and calculation can be performed on the battery life loss so as to avoid the risk of overestimating the energy storage investment benefit, better adapt to the characteristic of multi-energy complementation of the comprehensive energy, improve the planning -operation economy of the comprehensive energy system and improve the energy utilization rate of the system. The battery life is prolonged.

Description

technical field [0001] The invention relates to the field of comprehensive energy electric / thermal hybrid energy storage, in particular to a comprehensive energy electric / thermal hybrid energy storage configuration method considering battery life loss. Background technique [0002] Under the background of global climate deterioration and energy crisis intensification, my country has accelerated the pace of building an integrated energy system and upgrading the energy system. As an important part of the comprehensive energy system, energy storage can be optimized synergistically with renewable energy to improve system operation economy, promote renewable energy consumption, support peak shifting and valley filling, and improve power quality. Under the background of multi-energy complementarity in the integrated energy system, how to optimize the allocation of electric / thermal hybrid energy storage capacity has become an important issue in the planning of the integrated energy...

AI Technical Summary

Problems solved by technology

Neglecting the life loss of batteries in the planning will overestimate the investment benefits of energy storage, and the configuration capacity at this time is often not optimal, which will lead to a large deviation between the preliminary planning and operation plan of the integrated energy system and the actual situation, and the economic efficiency and expectations does not match

However, the current research on the configuration of electric / thermal hybrid energy storage in integrated energy systems has relatively insufficient consideration of the impact of battery life loss, and has not considered the synergistic effect between electric / thermal energy storage on battery life loss.

[0004] In addition, some studies limit the number of cycles and the length of use of the battery, and simplify the life loss to a fixed value caused by factors such as charging behavior and time, and the accuracy of the model is insufficient; the loss density function method, rain flow counting method, cycle counting method based on experimental data Aging and calendar aging models are too complex, and the amount of calculation in planning is too large

Images