Optimal distribution method and device for power of multiple battery packs in energy storage power station

Abstract

The invention provides an optimal distribution method and device for power of multiple battery packs in an energy storage power station. By determining the total number of the battery packs for charging and discharging switching in the energy storage power station, calculating the minimum variance of states of charges of the battery packs under each condition, comparing the minimum variance with state of charge variance limit values of the battery packs in the energy storage power station and selecting an eligible minimum number of times of switching of charging and discharging of the battery packs, the number of times of switching of charging and discharging of all the battery packs when the energy storage power station cooperates with new energy to perform fluctuation suppression, peak shaving and contribution to a tracking plan can be effectively reduced, and the service lives of the battery packs can be prolonged, so that the operation cost is reduced, and the economical property is improved; meanwhile, the SOC (state of charge) variation can be controlled within a certain range, thus avoiding weakening of the contribution capacity of the energy storage power station.

Description

technical field [0001] The invention relates to the technical field of energy storage operation control, in particular to a method and device for optimizing power distribution of multiple battery packs in an energy storage power station. Background technique [0002] Due to the fluctuating, intermittent and unpredictable nature of renewable energy power generation, it brings great challenges to the operation of the power system. Energy storage is an effective technology to solve large-scale renewable energy access to the power system, and energy storage battery has the advantages of modularization, fast response and high degree of commercialization, which has become one of the priority development directions. [0003] With the rapid development of energy Internet, battery energy storage technology has developed from small-capacity and small-scale research and application to large-capacity and large-scale energy storage power station research and application. The cooperation...

AI Technical Summary

Problems solved by technology

A large-scale energy storage power station generally includes an energy storage module composed of multiple battery packs and a Power Conversion System (PCS). At present, there is no effective method for real-time power distribution among multiple battery packs in an energy storage power station. The rational distribution of power between multiple battery packs and the optimization of the operation of energy storage power stations have become issues worthy of research

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