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Super-large-scale hybrid energy storage power balance control system and method

A hybrid energy storage and ultra-large-scale technology, applied in the direction of AC network load balancing, etc., can solve the problems of short life of energy storage batteries and uneven power distribution of energy storage batteries

Active Publication Date: 2020-05-12
CHINA ELECTRIC POWER RES INST +3
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  • Application Information

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Problems solved by technology

[0003] This application provides a super-large-scale hybrid energy storage power balance control system and method to solve the problems of short life of energy storage batteries and uneven power distribution between energy storage batteries caused by the prior art

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  • Super-large-scale hybrid energy storage power balance control system and method
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  • Super-large-scale hybrid energy storage power balance control system and method

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[0032] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways that are different from those described here, and those skilled in the art can make similar promotions without violating the connotation of the present application, so the present application is not limited by the specific implementation disclosed below.

[0033] figure 1 An ultra-large-scale hybrid energy storage power balance control system provided for this application, including: multi-level inverter MMC, modular multi-level inverter state evaluation unit, network channel CAN, power balance controller, hybrid storage Can MMC contribute to optimize the unit;

[0034] Modular multi-level inverter MMC is used to convert the electrical energy on the AC grid into a form that can be stored by energy storage batteries and supercapacitors, and convert the stored electric...

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Abstract

The invention discloses a super-large-scale hybrid energy storage power balance control system. The system comprises a multi-level inverter MMC, a modular multi-level inverter state evaluation unit, anetwork channel CAN, a power balance controller and a hybrid energy storage MMC output optimization unit, the modular multilevel inverter MMC is used for converting electric energy on an alternatingcurrent power grid into a form which can be stored by an energy storage battery and a super capacitor; the modular multilevel inverter state evaluation unit is used for evaluating the charge state ofeach modular multilevel inverter; the network channel CAN is used for communication among the modular multilevel inverters; the power balance controller is used for enabling the whole energy storage substation to meet the target power and enabling the charge states of all the modular multilevel inverters to be consistent at the same time; the hybrid energy storage MMC output optimization unit is used for reasonably distributing the probability that super capacitors and energy storage batteries participate in work, and solving the problems that in the prior art, the service life of the energy storage batteries is short, and power distribution between the energy storage batteries is uneven.

Description

technical field [0001] This application relates to the field of ultra-large-scale energy storage technology, in particular to an ultra-large-scale hybrid energy storage power balance control system, and at the same time relates to a super-large-scale hybrid energy storage power balance control method. Background technique [0002] With the depletion of fossil fuels and the continuous application of new energy technologies such as wind power and photovoltaics, the problems of intermittent, random and small inertia of new energy power generation have become increasingly prominent, seriously affecting the stability of the power grid. The application of large-scale energy storage technology is one of the main technical means to solve this problem. However, the existing lithium battery large-scale energy storage technology will greatly shorten the life of lithium batteries in the face of large-amplitude and violently fluctuating charge and discharge currents. In addition, problem...

Claims

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Application Information

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IPC IPC(8): H02J3/32
CPCH02J3/32
Inventor 李相俊闫士杰王上行贾学翠王立华杨水丽徐少华全慧
Owner CHINA ELECTRIC POWER RES INST
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