A long-standby power supply and SOC measurement integrated control method for a megawatt-level flow battery

Abstract

The invention relates to the technical field of energy storage batteries, in particular to an integrated control method for long-standby power supply and SOC measurement of a megawatt-level liquid flow battery. The megawatt-level all-vanadium redox flow battery system mainly includes: all-vanadium redox flow battery unit; auxiliary battery unit; time-sharing control unit; SOC measurement unit; power supply unit, black start unit, etc. The all-vanadium redox flow battery unit mainly includes: main stack, positive electrolyte tank, negative electrolyte tank, main pump drive module A, main pump drive module B, main positive circulation pump, main negative circulation pump, megawatt DC- DC module, DC‑DC module A, etc.; the auxiliary battery unit mainly includes: auxiliary battery, auxiliary positive circulation pump, auxiliary negative circulation pump, auxiliary pump drive module A, auxiliary pump drive module B; the advantage of this method is that it solves the problem of megawatt The problem of long-term standby of the high-level flow battery energy storage system; and the flow battery energy storage system can be switched from the standby state to the normal working state in time, which improves the working efficiency of the flow battery energy storage system.

Description

technical field [0001] The present invention relates to an energy storage system for a megawatt-level flow battery, and more specifically, to a control method for long-term standby self-power supply of a megawatt-level flow battery and the measurement of the state of charge of the electrolyte of the flow battery. Background technique [0002] At present, people have developed various forms of electrical energy storage methods, but various energy storage technologies are different in terms of energy density, power density, response speed, and capacity scale of energy storage systems. [0003] Vanadium Redox Battery (VRB) is a new type of energy storage device, which has outstanding advantages such as long service life, large energy storage scale, easy regulation, good battery uniformity, no cross-contamination, safety and reliability, and has become a large-scale storage device. It is one of the preferred technologies for energy, and has extremely broad application prospects ...

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Problems solved by technology

[0006] The purpose of the present disclosure is to overcome the deficiencies in the prior art, and provide a control method integrating the long-standby power supply and SOC measurement of the megawatt-level flow battery, so as to improve the working efficiency of the flow battery energy storage system and solve the problem of The problem of long-term standby of megawatt-level flow battery energy storage system

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