Alternating-current self-recovery ordered power supply and cut-off device

Abstract

An AC switch QF1 of a main power line is connected with an input side and a load side of a power grid, an input side of an AC micro-breaking switch QF2 is connected with an output side of the AC switch QF1, an output side of the AC switch QF2 is connected with a power supply module PW, an output side of the power supply module PW is connected with a fuse FU1 in series to a storage battery BAT, and the storage battery BAT is connected with the AC micro-breaking switch QF2. The output side of the storage battery BAT is connected with the fuse FU2 in series, the fuse FU2 is connected with the control unit MCU, the alternating current switch QF1 is connected with the fuse FU3 in series to the control unit MCU, and the control unit MCU collects the voltage and the phase sequence of the input side of the alternating current switch QF1 and drives the intermediate relay KA to enable the action electric operation mechanism M to conduct opening and closing of the alternating current switch QF1. Compared with traditional power distribution, the operation cost is effectively reduced, the safety and reliability are improved, and the life cycle of equipment is prolonged.

Description

Technical Field

[0001] This utility model relates to an AC self-recovering orderly power supply and disconnection device, belonging to the field of power technology. Background Technology

[0002] With the rapid development of new energy sources, applications in charging stations, data centers, and power distribution rooms are increasing. However, temporary power outages or sudden intermittent power interruptions can have a significant impact on equipment during the moment the power grid is restored. This can result in large currents or electric arcs, potentially causing fires or equipment damage. Utility Model Content

[0003] The purpose of this invention is to provide an AC self-recovering orderly power supply and disconnection device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An AC self-recovering orderly power supply and disconnection device comprises an AC switch QF1 of the main power line connected to the grid input and load side, an AC miniature circuit breaker QF2 whose input side is connected to the output side of AC switch QF1, an AC switch QF2 whose output side is connected to a power module PW, a fuse FU1 connected in series to a storage battery BAT on the output side of the power module PW, a fuse FU2 connected in series on the output side of the storage battery BAT, a control unit MCU connected to the fuse FU2, and an AC switch QF1 connected in series to a fuse FU3 connected to the control unit MCU. The control unit MCU collects the voltage and phase sequence of the input side of AC switch QF1 and drives the intermediate relay KA to enable the electric operating mechanism M to open and close AC switch QF1.

[0006] Compared with existing technologies, the beneficial effects of this utility model are as follows: This invention is an AC power outage self-recovery orderly power-on / off device. It mainly solves the problems of improving the safety and reliability of power distribution, and quickly and timely restoring the operation of electrical equipment. It reduces human intervention and effectively avoids accidents. Power outages and restorations can be remotely controlled. When the power grid experiences a sudden intermittent power outage, it automatically disconnects the load downstream of the main distribution switch, effectively avoiding the inrush current and arcing caused by high current during instantaneous power grid restoration. It automatically disconnects the main distribution switch upon detecting phase loss or low / high voltage in the power grid, effectively protecting the lifespan of equipment. When the power grid returns to normal, the circuit automatically and orderly closes, thereby avoiding the arcing caused by inrush current and high current. Attached Figure Description

[0007] Figure 1 This is the circuit schematic diagram of this utility model. Detailed Implementation

[0008] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0009] like Figure 1 As shown, the main power line AC switch QF1 is mainly responsible for connecting to the grid input and the load side. The input of the AC miniature circuit breaker QF2 is connected to the output side of the AC switch QF1, and the output is connected to the input of the power module PW. The power module PW is responsible for charging the storage battery BAT. The output of the power module PW is connected in series with the fuse FU1 to the storage battery BAT. The fuse FU1 mainly protects the storage battery BAT from short circuits or overcurrent. The output of the storage battery BAT is connected in series with the fuse FU2. The fuse FU2 is connected to the control unit MCU. The fuse FU2 mainly protects the control unit MCU. The control unit MCU collects the voltage and phase sequence of the input side of QF1 and drives the intermediate relay KA to enable the electric operating mechanism M to open and close the AC switch QF1.

[0010] When the MCU (Microcontroller Unit) detects excessively frequent occurrences of phase loss, three-phase imbalance, or fluctuating voltage on the AC input side, which is detrimental to the normal operation of the equipment, the MCU triggers a dry contact signal to the intermediate relay KA, driving the electric operating mechanism M to trip. This protects the equipment.

[0011] When the control unit MCU detects that the AC input side has returned to normal, it uses energy supplied by the storage battery BAT. The control unit MCU triggers the intermediate relay KA to drive the electric operating mechanism M to close the circuit. During the closing process, it performs one tripping operation before closing again, reducing the risk of electric shock.

[0012] Orderly power supply is a comprehensive management system for the entire station. For example, orderly power supply to charging piles can reduce or even avoid the impact on the power grid or the charging piles themselves when large-scale charging piles are powered on. The control unit MCU sequentially closes only one charging pile at a time to mitigate the impact during power-on. This invention can be used not only for charging piles or charging stations, but also in high and low voltage distribution cabinets, data centers, buildings, and other locations.

[0013] The above description is a preferred embodiment of the present utility model. For those skilled in the art, any changes, modifications, substitutions and variations made to the implementation methods without departing from the principles and spirit of the present utility model, based on the teachings of the present utility model, still fall within the protection scope of the present utility model.

Claims

1. An AC self-recovering ordered power supply and disconnection device, characterized in that, The AC switch QF1 of the main power line is connected to the grid input and load side. The input side of the AC miniature circuit breaker QF2 is connected to the output side of the AC switch QF1. The output side of the AC switch QF2 is connected to the power module PW. The output side of the power module PW is connected in series with the fuse FU1 to the storage battery BAT. The output side of the storage battery BAT is connected in series with the fuse FU2. The fuse FU2 is connected to the control unit MCU. The AC switch QF1 is connected in series with the fuse FU3 to the control unit MCU. The control unit MCU collects the voltage and phase sequence of the input side of the AC switch QF1 and drives the intermediate relay KA to enable the electric operating mechanism M to open and close the AC switch QF1.

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