Method and system for calculating access battery energy storage station in transformer substation

Abstract

The invention provides a method of calculating an access battery energy storage station in a transformer substation. The method comprises the steps of: obtaining the adjustable capacity of a grid-connected unit and the peak regulation capacity of an external power transmission channel, and calculating the adjustable capacity of a power grid, obtaining a power grid peak regulation demand value, andcalculating the total energy storage capacity required by the to-be-accessed power grid according to the adjustable capacity of the power grid, determining the maximum number of arranged battery energy storage stations according to the available land area and space in each transformer substation, determining the maximum power capacity of the battery energy storage stations according to the load access condition in each transformer substation, and obtaining the final number and the power capacity of the arranged battery energy storage stations, and if the total energy storage capacity is smaller than or equal to the sum of the power capacities of the final battery energy storage stations in the substations, outputting the final number and the power capacity of the battery energy storage stations arranged in the each transformer substation. By implementing the method, the arrangement construction and access conditions of the battery energy storage stations can be fully considered, the feasibility of a planning result is improved, and the priority and the construction time sequence of the battery energy storage station can be clarified.

Description

technical field [0001] The invention relates to the technical field of electric power systems, in particular to a method and system for calculating the connection of a battery energy storage station in a substation. Background technique [0002] As the load peak-to-valley difference increases day by day, the problem of insufficient peak-shaving capacity of the power grid becomes increasingly prominent. Due to the flexibility of installation and operation of battery energy storage technology, it is increasingly widely used on the grid side, making battery energy storage stations an effective means to solve the problem of grid peak regulation. [0003] At present, a relatively unified design method is rapidly forming in the engineering application of grid-side battery energy storage stations, while investment economic models are mostly used in planning technology, with the goal of optimizing the overall social benefits or the investor's perspective, and determining The planne...

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Problems solved by technology

[0004] However, the existing battery energy storage station construction scheme has the following defects: (1) The construction space and access conditions of the grid-side battery energy storage station are not fully considered, and the energy storage capacity that can be connected to a single substation is limited Under the circumstances, if multiple substations are connected, the construction and maintenance costs will be greatly increased; (2) The construction sequence or priority is not clear, and the importance and priority of multiple battery energy storage stations cannot be determined in the case of limited time. level, unable to provide sufficient decision-making basis for grid companies or investors

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