Battery power control method for types of high-capacity megawatt battery energy storage power stations

Abstract

The invention relates to a battery power control method for types of high-capacity megawatt battery energy storage power stations, which comprises the following steps of: A, reading data; B, determining a total command value of each battery energy storage system by using a wavelet transform controller module; C, calculating battery power command values of each energy storage subunit by using a power allocation controller module; D, aggregating the battery power command values of each energy storage subunit by using a power aggregation module; and E, outputting the data. In the method, cooperative control over battery power in the types of high-capacity megawatt battery energy storage power stations based on lithium ions, flows, sodium-sulphur and the like is finished by an industrial personal computer and a communication platform, real-time effective control over the types of high-capacity megawatt battery energy storage power stations can be realized, and the aims of improving the utilization efficiency of energy storage batteries of different types and prolonging the service life of each energy storage battery are fulfilled according to the characteristics of the batteries of different types that lithium ion batteries, sodium-sulphur batteries and flow batteries serve as low frequency, intermediate frequency and high frequency components in current required total power respectively and the like.

Description

technical field [0001] The invention relates to a battery power control method for a multi-type large-capacity megawatt-level battery energy storage power station, in particular to a multi-type large-capacity megawatt-level battery energy storage suitable for lithium-ion batteries, liquid flow batteries, and sodium-sulfur batteries. A method for distributing power between energy storage subunits in a power station belongs to the technical field of smart grid and electric energy storage and conversion. Background technique [0002] With the continuous development of batteries and their integration technologies, it has gradually become a feasible solution to apply energy storage battery systems to smooth the output of wind power and solar power. Several common energy storage systems include pumped storage systems (PSS), flywheel energy storage system (FESS), superconducting magnetic energy system (SMES), battery storage Energy storage system (battery energy storage system, BE...

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Problems solved by technology

Moreover, in the wind-solar-storage combined power generation system, if there is no reasonable and effective control method to monitor the remaining power of the energy storage battery, it will increase unnecessary battery capacity and use costs

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