Electrical equipment and power fluctuation suppression method, device and system thereof

Abstract

The invention discloses electrical equipment and a power fluctuation suppression method, device and system thereof. The electrical equipment power fluctuation suppression method comprises the steps ofobtaining the current DC bus voltage and the current DC bus current at a predetermined time interval; determining the current power variation according to the current DC bus voltage and the current DC bus current; judging whether the current power variation is greater than or equal to a predetermined power variation value or not; adjusting at least one of the current DC bus voltage and the current DC bus current in the case that the current power variation is greater than or equal to the predetermined power variation value so as to enable the current power variation to be less than the predetermined power variation value. The electrical equipment power fluctuation suppression method can prevent the energy impact through a power step fluctuation suppression technology, can avoid damages brought to the system by the step impact, and also can ensure reliable and continuous operation of the system.

Description

technical field [0001] The invention relates to the field of electrical equipment, in particular to an electrical equipment and a power fluctuation suppression method, device and system thereof. Background technique [0002] Power grid failure, engineering installation and maintenance, multi-component commutation dynamic switching, unit mode conversion, etc. lead to DC bus voltage adjustment, flicker, drop, current overshoot, and power step fluctuations of electrical equipment, which will lead to electrical equipment such as optical storage air conditioners. The system crashes and the power grid is partially paralyzed, affecting the reliability of the unit and user experience. [0003] For example: in the actual air conditioner installation and maintenance site, bus voltage flicker and power step fluctuations during drops will lead to voltage drops of 46V within 100ms, current flicker of 26A, and power step fluctuations of 400W, resulting in unstable control of the unit and ...

AI Technical Summary

Problems solved by technology

[0002] Power grid failure, engineering installation and maintenance, multi-component commutation dynamic switching, unit mode conversion, etc. lead to DC bus voltage adjustment, flicker, drop, current overshoot, and power step fluctuations of electrical equipment, which will lead to electrical equipment such as optical storage air conditioners. The system crashes and the power grid is partially paralyzed, affecting the reliability of the unit and user experience

[0003] For example: in the actual air conditioner installation and maintenance site, bus voltage flicker and power step fluctuation during drop will lead to voltage drop of 46V within 100ms, current flicker of 26A, power step fluctuation of 400W, resulting in unstable control of the unit and protection shutdown

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