Method for managing battery modules of energy storage power station of power grid

Abstract

The invention relates to a method for managing battery modules of an energy storage power station of a power grid, and belongs to the technical field of energy storage systems of power grids. The method includes transmitting data sampling requests to single battery management units, starting analog quantity sampling functions of battery module managing units, acquiring initial state data of batteries and processing the initial state data of the batteries and history state data to obtain real-time state data; diagnosing faults according to the real-time state data, and computing residual electric quantities of the batteries according to a battery electric quantity estimation algorithm; implementing module balancing and module cooling algorithms according to the real-time state data and the residual electric quantities of the batteries, and outputting start and stop control signals of module balancing devices and module cooling fans; reporting the real-time state data, residual electric quantities of battery sets and states of the module balancing devices and the module cooling fans to top battery management units, updating the history state data and entering a next cycle. The method in an embodiment of the invention has the advantages that the battery modules are effectively managed, the running safety of the energy storage power station is improved, and an economic benefit of the energy storage power station is increased.

Description

technical field [0001] The invention relates to a battery module management method for a grid energy storage power station, belonging to the technical field of grid energy storage systems. Background technique [0002] With the construction of smart grids around the world, the importance of grid energy storage technology has become increasingly prominent. When renewable energy power generation rises, its impact on the power grid is also accompanied. Grid energy storage technology can smooth the power of new energy power generation and grid connection, which is one of the most effective ways to solve the problem of new energy grid connection. [0003] At present, the number of battery cells in a large-scale battery energy storage system is relatively large, which can reach hundreds or thousands, and they are connected in series, parallel or a combination of series and parallel. Several battery cells are connected in series and parallel to form a battery module, and several b...

AI Technical Summary

Problems solved by technology

The working environment of the energy storage power station is relatively good, and the current changes are relatively smooth, but the problems of high voltage and strong interference are prominent, the amount of battery information to be processed is relatively large, the requirements for balancing functions and heat dissipation functions are high, and the requirements for fault response and fault early warning are high.

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