• Q
    What are the functional characteristics of the cascaded 35KV high-voltage direct-mounted large-capacity energy storage system?

    1) Efficient and balanced battery energy, high capacity utilization, and good economy;

    2) High reliability, modular design, PCS operating current not higher than 300A, good electromagnetic stability;

    3) The charge-discharge transition is fast, and the charge-to-discharge time is less than 5ms;

    4) With redundancy capability, the fault removal capacity is small, which is 3% lower than the rated capacity of a single installed machine;

    5) High safety, single-machine 50MWh system does not need batteries and battery clusters to be connected in parallel;

    6) The system efficiency is 5%~10% higher than that of transformer step-up products;

    7) Large capacity of single unit (50MW), few system access points, simple construction and less land occupation;

    8) Support on/off grid non-disruptive switching, black start and other functions, and can be directly controlled by the dispatching system.

  • Q
    Whether the shore power control cabinet door is closed will affect the normal start of the system?

    The control cabinet door is not affected, but all other cabinet doors need to be closed reliably. If there is no reliable closing, the system error prevention function will prohibit the high-voltage power input switch from closing, and the variable frequency and variable voltage power supply system cannot be started normally.

  • Q
    Notes on shore power maintenance and parts replacement

    1) If you cannot confirm that there is no voltage and the temperature is not high, please do not touch any part of the cabinet;

    2) Only after the high-voltage power supply is cut off for 30 minutes, and after confirming that the discharge completion indicator lights on the inverter boxes of each unit are on, can the variable-frequency variable-voltage power supply system be maintained and inspected;

    3) Maintenance inspection and parts replacement must be carried out by qualified personnel;

    4) You should always check whether the grounding resistance meets the requirements of equipment operation and national standards. If the grounding resistance does not meet the requirements, it may cause danger;

    5) The product adopts forced air cooling, and dust and other debris will accumulate during use, please clean it regularly;

    6) After the product has been in operation for a period of time, the mechanical vibration may cause the electrical contact parts to loosen, resulting in poor contact. In severe cases, the components and the whole machine may be damaged. Therefore, inspection and maintenance must be carried out after a period of use to avoid losses;

    7) A system for recording equipment operating conditions and an application maintenance system should be formed.

  • Q
    Inverter operating environment requirements?

    1) Points to consider: maintenance space, heat dissipation method, dustproof, moistureproof, waterproof, high temperature or corrosive gas, etc.;
    2) Effect of temperature: the stability of system operation and the service life of power components, every 10K increase in ambient temperature, the service life will be reduced by half;
    3) Temperature range: -5°C to +45°C, the temperature change should not exceed 5K/h, and it is generally recommended that the operating environment temperature be controlled at 25°C;
    4) Heat dissipation method: air duct heat dissipation, air conditioning heat dissipation, air-water cooling heat dissipation.

  • Q
    What are the contents of the daily inspection of the inverter?

    1) Check the temperature, humidity, vibration, etc. of the surrounding environment, and check whether there is dust, gas, or condensation.
    2) Check whether the LED and touch screen display on the controller panel are normal.
    3) Check the system for abnormal vibration, noise or smell.
    4) Check whether there is an alarm message displayed on the touch screen, and there is an event record that does not need to be processed.
    5) The dust condition of the dust-proof net.

  • Q
    What is the difference between inverter failure and alarm?

    There are two levels of fault information according to the severity of the impact on ZINVERT system operation:

    1) Fault: When a serious failure occurs in the frequency conversion speed control system and its connected equipment (transformer, motor, etc.), an error message will be formed. At this time, the frequency conversion speed control system will block the output and keep the output state (except for some in the frequency conversion speed control system. Except for the faults that the frequency conversion speed control system can automatically restart after the fault of the speed control system is eliminated).

    After a fault causes a shutdown, in order to restart the system, it is necessary to manually reset the fault after troubleshooting. Press the "Function" button on the controller, press the "Mute" button on the touch screen, or operate the "Mute" button via remote control.

    2) Alarm: When a less serious fault occurs and the frequency conversion speed control system does not need to be stopped immediately, the system will give an alarm, and the operation can still be performed at this time; however, the alarm signal will not be processed accordingly within a certain period of time. If it is cleared, it will lead to failure (for example: high temperature alarm signal caused by poor heat dissipation due to ambient temperature exceeding the allowable working ambient temperature range or air filter blockage).

  • Q
    How to check the unit DC voltage and unit status?

    1) Click "Data Monitoring" on the touch screen, and then click "Unit Data" to view the DC voltage of the unit.
    2) Click "Unit Status", and then click the corresponding unit to view the status information of the corresponding unit.

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