Power grid side energy storage device capacity calculation method considering kilowatt-hour cost of energy storage devices

Abstract

The invention relates to a power grid side energy storage device capacity calculation method considering the kilowatt-hour cost of energy storage devices, and belongs to the field of power system optimization planning and energy storage. The method comprises establishing a charging and discharging life model of multiple types of electrochemical energy storage devices, and converting the charging and discharging life of the energy storage devices into the charging and discharging kilowatt-hour cost of the energy storage devices; comprehensively considering the optimal planning objective function of the power grid, the constraint conditions of elements in the power grid and the investment operation cost of the power grid, and establishing a capacity planning model of the power grid side energy storage device considering the kilowatt-hour cost of the energy storage device; and finally, carrying out optimization solution on the model to obtain an optimization planning scheme of the capacity of the power grid side large-scale energy storage device with the lowest operation cost. According to the method, the kilowatt-hour cost of the energy storage devices is considered, the capacity calculation method suitable for the power grid side large-scale energy storage devices is provided, and after connection of the power grid side energy storage devices, the investment and operation cost of the power grid is reduced while the peak regulation and frequency modulation capacity and the renewable energy consumption capacity of the power grid are improved.

Description

technical field [0001] The invention relates to a method for calculating the capacity of a grid-side energy storage device considering the energy storage device's kWh cost, and belongs to the technical fields of power system planning and energy storage. Background technique [0002] Energy clean and low-carbon transformation is an inevitable trend of global energy development. Energy storage is a key supporting technology for smart grids and energy systems with a high proportion of renewable energy. Energy technology is of great significance to promote the replacement of my country's main energy from fossil energy to renewable energy. Energy storage can provide various services such as peak shaving, frequency regulation, backup, emergency response support, and renewable energy consumption for grid operation. It is an important means to improve the flexibility, economy, and security of traditional power systems, and can significantly improve grid Adaptability to the changes a...

AI Technical Summary

Problems solved by technology

However, most of the existing research methods model the energy storage capacity planning in the grid as a mathematical optimization problem under several alternative schemes

Most of these alternatives are artificially set, and there is no method to determine the overall demand boundary of energy storage

In addition, existing research usually only focuses on a single application scenario, and it is difficult to quantitatively evaluate the overall energy storage demand of the system in multiple application scenarios such as system peak shifting and valley filling, and new energy fluctuations.

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