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A capacity calculation method for shared batteries based on battery life

A technology of battery life and calculation methods, applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc.

Active Publication Date: 2019-03-29
TSINGHUA UNIV
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Problems solved by technology

[0019] The purpose of the present invention is to propose a capacity calculation method for shared batteries based on battery life, and to solve the problem that the impact of battery aging on investment decisions cannot be easily and effectively considered when making battery energy storage investment decisions in the power grid. A shared battery investment decision-making method considering battery life, applying the aging model and iterative process to the shared battery investment capacity decision, can make the shared battery investment decision fully consider the impact of battery operation on battery life, and enhance the shared battery Rationality and effectiveness of investment decisions

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  • A capacity calculation method for shared batteries based on battery life
  • A capacity calculation method for shared batteries based on battery life
  • A capacity calculation method for shared batteries based on battery life

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Embodiment Construction

[0086] The capacity calculation method of the shared battery based on battery life proposed by the present invention comprises the following steps:

[0087] (1) Set the number of iterations n, set n=1 during initialization;

[0088] (2) Start the nth iteration to calculate the life of the shared battery. The specific process is as follows:

[0089] (2-1) Establish a cost objective function when user i uses the main battery as follows:

[0090]

[0091] in, is the cost of user i’s body battery, r is the discount rate (discount rate refers to the ratio of converting the expected income in a limited period in the future into the present value, which is used to consider the time value of funds), Y (n) The lifetime of the shared battery calculated for the nth iteration, Y (0) is the initially set shared battery life, γ P is the unit power capacity price of the user’s own battery, γ E The price per unit energy capacity of the user's battery, is the power capacity of user ...

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Abstract

The invention relates to a capacity calculation method of a shared battery based on the battery life, and belongs to the technical field of power grid equipment investment. A charge and discharge demand curve when each user independently use energy storage in present iteration is determined through a linear programming method in each time of iteration according to the electricity price, the user load data and the shared battery life set by present iteration, then the capacity of the shared battery in present iteration and the charge and discharge curve are determined through the linear programming method, and the battery life is updated through a battery aging model. The influence of battery aging on the battery life caused by battery operation is fully considered, and the influence on the equal annual investment cost is considered in the investment decision so that the investment decision of the minimal integrated cost of equal annual investment operation can be made.

Description

technical field [0001] The invention relates to a capacity calculation method of a shared battery based on battery life, and belongs to the technical field of grid equipment investment. Background technique [0002] Batteries are an important type of energy storage equipment that can be widely used in power grids to provide services such as peak shaving and valley filling, and stabilization of new energy volatility. Users can also invest in battery energy storage devices, which can reduce the user's electricity bill by allowing the battery to charge when the electricity price is low and discharge when the electricity price is high and the electricity is needed. The battery energy storage device invested by a single user on the user side and not shared with other users can be called distributed battery energy storage. Shared battery energy storage is an alternative way for users to use physical distributed battery energy storage, such as the papers in the prior art: Liu J, Z...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/367
CPCG01R31/367
Inventor 刘静琨张宁康重庆夏清
Owner TSINGHUA UNIV
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