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    ZHIGUANG Cascaded High-Voltage Energy Storage System

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    alam

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    Download as PDF, TXT or read online from Scribd

    ZHIGUANG Cascaded High-Voltage Energy Storage System

    Uploaded by

    alam
    34 views6 pages

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    © © All Rights Reserved

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    PDF, TXT or read online from Scribd

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    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    34 views6 pages

    ZHIGUANG Cascaded High-Voltage Energy Storage System

    Uploaded by

    alam

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 6

    The cascaded high-voltage energy storage system can be directly connected to the grid without

    going through boosting transformer, with voltage levels ranging from 6kV to 35kV.
    Each phase of the system is formed by series connection of several single-phase energy storage
    converter units to form a high-voltage output.
    The cascaded high-voltage energy storage system mainly includes access equipment, PCS, BMS,
    EMS, fire protection and environmental control systems.

    Figure 1 Basic working principle of cascade high-voltage energy storage

    - Directly connected to the grid with 6-35kV high voltage without the need for transformer
    step-up/step-down
    - One cluster, one management, lossless active balancing, increasing grid-connected power by
    more than 10% per cycle with the same installed capacity
    - 23% increase in grid-connected power over the entire lifecycle, significantly reducing electricity

    1
    and mileage costs
    - Charging and discharging cycle efficiency of over 90%, increasing single-cycle revenue by 7%

    - No parallel connection of battery cells or clusters, no operating circulating current, all battery
    cells operate at or below rated rates, ensuring safety in the mid to later stages of the power
    station.
    - Cloud-online supporting full-scene online monitoring and scheduling
    - Prevention-oriented fire protection strategy, using an independent fire protection system

    - 35kV cascaded high-voltage direct connection, with a single unit power up to 25MW, and only 4
    units are needed for a 100MW power station
    - The main equipment and secondary systems for grid connection are greatly simplified, reducing
    project costs by 8%
    - The single unit can independently accept grid regulation and control, with a response of no
    more than 10ms.

    System scale#：ZGC-10ESS-7.5MW/15MWh-L
    System scale#：ZGC-35ESS-20MW/40MWh-L

    |
    ·0.5P

    System scale#：0.4ESS-5MW/10MWh-A
    System scale#：35ESS-20MW/40MWh-A
    System scale#：10ESS-5MW/10Wh-A

    ·1P

    System scale#：10ESS-5MW/5MWh-A
    System scale#：6ESS-5MW/5MWh-A

    The modular low-voltage energy storage system is a low-voltage, small-power distributed Boost
    voltage and connect to the grid energy storage system. Each cluster of batteries is connected to a
    PCS unit, and the PCS adopts small-power and distributed layout.

    3
    Figure 2 Basic working principle of modular low-voltage energy storage system

    -Uses lithium iron phosphate battery cells with high thermal stability
    - IP54
    -Prevention-oriented fire protection strategy, using an independent fire protection system

    -One cluster, one management, each cluster inverter and grid-connected separately, with high
    utilization
    - Cluster-level active balancing for higher charge and discharge capacity
    - Cloud online supporting full-scene monitoring and scheduling

    - Non-walk-in/modular high-integration design, 1500V system


    - Electrical and battery compartmentalized design for convenient maintenance
    - Prefabricated cabin installation solution, reducing on-site installation costs and commissioning
    time

    4
    ·Liquid cooled 3400kWh

    System scale#：ESS-3.4MW/6.8MWh-L

    ·Liquid-cooled 372kWh outdoor integrated cabinet

    System scale#：ESS-230kW/372kWh-L

    5
    ·Low voltage air cooled 10MWh

    System scale#：ESS-5MW/10MWh-A

    ·Low voltage air cooled 200KWh

    System scale#：0.38ESS-100kW/200kWh-A

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