An energy storage system and method for improving the operation reliability of a liquid flow battery
A technology of a flow battery and an energy storage system, applied in the field of energy storage systems, can solve the problems of unprotected and redundant design of stacks and stacks, the inability of the battery system to continue to operate, and the reduction of the operating efficiency and reliability of the battery system, etc. Achieve the effect of optimizing control strategy, improving reliability, improving reliability and efficiency
Active Publication Date: 2017-04-26
DALIAN RONGKE POWER
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Problems solved by technology
The stack is the basic core component of the flow battery. Multiple stacks are connected in series to form a stack unit, and multiple stack units are connected in series to form a battery unit. Since multiple stacks in the energy storage subunit are connected by a circuit It constitutes an overall structure, and there is no protection and redundancy design between the stacks. Therefore, when any of the stacks in the battery unit fails, it will be directly fed back to the battery management system, causing the battery system to fail to continue to operate. After the battery system is shut down as a whole, inspection and maintenance work is carried out uniformly, which greatly reduces the operating efficiency and reliability of the battery system
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[0030] Such as figure 1 The shown energy storage system for improving the operational reliability of a liquid flow battery includes: at least one battery unit 3; the battery unit 3 includes at least two electric stack units 32 connected in series; each electric stack unit 32 includes a first A switch 321, a second switch 323, and at least one electric stack 322; the first switch 321 and at least one electric stack 322 are connected in series, and the two ends of the first switch 321 and the electric stack 322 connected in series are connected in parallel with the second switch 323; at least one energy storage inverter 2; each energy storage inverter 2 is correspondingly connected to each battery unit 3; connecting the battery unit 3 is used to control the first switch 321 and the second switch 321 of each stack unit 32 The switching state of the second switch 323, and the battery management system 4 for determining the charging and discharging parameters required for the stack...
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The invention discloses an energy storage system capable of increasing operational reliability of flow battery and a method thereof. The energy storage system comprises at least a battery unit, wherein the battery unit at least comprises two mutual connected electric pile units in series, each electric pile unit comprises a first switch, a second switch and at least an electric pile; at least an energy storage inverter, wherein each energy storage inverter is connected by corresponding to each battery unit; a connection battery unit used for controlling a switch state of the first switch and the second switch of the electric pile unit; a battery management system capable of determining the charge and discharge parameter required by the electric pile unit without fault generation; and a local monitoring system used for controlling and adjusting match of the output / input parameters of the energy storage inverter and the charge and discharge parameters required by the electric pile unit without fault generation. The energy storage system can avoid a flow battery energy storage apparatus in prior art, when any electric pile generates fault, system can not be continuously operated, and system operation reliability is increased.
Description
technical field [0001] The invention relates to an energy storage system and a method for improving the operation reliability of a liquid flow battery. Background technique [0002] Electric energy is difficult to store and indispensable. Its production must meet the demand for electricity at any time. Therefore, people have been looking for economical and feasible energy storage technologies to solve the contradiction between supply and demand and decouple the production of electric energy from demand. In addition, electric energy storage plays an important role in electric energy management, grid auxiliary services, voltage control, renewable energy utilization, and large-scale uninterruptible power supplies. If combined with large-scale thermal power generation, it can reduce the peak capacity of power stations, reduce power generation costs, and reduce pollution. If it is combined with renewable energy such as wind power, solar energy, and tidal energy, it can realize co...
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IPC IPC(8): H01M8/04298H01M8/04664H02J7/00
CPCY02E60/50
Inventor 邵家云张华民马相坤赵海军
Owner DALIAN RONGKE POWER