CN206370728U - A kind of intelligent electric power switching device - Google Patents

Abstract

The utility model relates to an intelligent power switching device which can automatically adjust the power of a generator according to the total power of the load in the case of a mains power failure, comprising a generator, an MCU, a voltage sensor, a first relay, a second relay, a touch screen, A plurality of loads, power busbars and control busbars, the first relay input terminal is connected to the mains, the first relay output terminal is connected to the power busbar, the first relay control terminal is electrically connected to the MCU, and the MCU controls the generator start and adjusts the generator power gear , the output terminal of the generator power supply is electrically connected to the input terminal of the second relay, the output terminal of the second relay is electrically connected to the power bus, the control terminal of the second relay is electrically connected to the MCU, the input terminal of the voltage sensor is connected to the mains, and the output terminal of the voltage sensor It is electrically connected to the MCU, and the MCU is respectively connected to the touch screen and the control bus, the power bus supplies power to each of the loads, and the control bus controls and connects to each of the loads.

Description

An intelligent power switching device

technical field

The utility model relates to the technical field of power switching, in particular to an intelligent power switching device.

Background technique

At present, power consumption in factories, shopping malls, banks, hospitals and other production or public places requires uninterrupted power supply, so factories, shopping malls, banks, hospitals and other production or public places are generally equipped with dual power supply or multi-power switching circuit systems, Guaranteed uninterrupted power supply. An intelligent power automatic switching device as disclosed in China Patent Authorization Announcement No. CN204559228U on April 30, 2015, includes a cabinet, and a dual power switch and a power distribution room are arranged in the cabinet, and the dual power switch input The terminals are respectively connected to the mains and the generator, and the dual power switch automatically switches between the mains and the generator to supply power. The output of the dual power switch is connected to multiple loads through the power distribution room, and the power distribution Grading from important to secondary, when the generator supplies power, the power distribution room energizes the loads from important to secondary loads in turn and detects the total power value of each energized load in real time, and loads or sheds the load according to the total power value of the generator load. In view of the above invention, the inventors found that it is difficult to classify loads in practical applications. In the above invention, the important loads are loaded first, and then the secondary loads are loaded or shed according to the total power value. However, in practical applications, some secondary loads The load is also very important or even necessary in specific occasions, and in the above-mentioned invention, there is no power generation gear of the generator to control, and now many generators can be adjusted, by adjusting the power generation power gear of the generator Adapting the power of the load is the preferred solution.

Utility model content

Therefore, in view of the above problems, the utility model proposes an intelligent power switching device that can automatically adjust the power of the generator according to the total power of the load in the case of a mains power failure.

In order to achieve the above object, the utility model adopts the following technical solutions: an intelligent power switching device, including a generator, an MCU, a voltage sensor, a first relay, a second relay, a touch screen, a plurality of loads, a power bus and a control bus , the input end of the first relay is connected to the mains, the output end of the first relay is connected to the power bus, and the control end of the first relay is electrically connected to the MCU. The MCU controls the starting of the generator and adjusts the power gear of the generator. The generator The output terminal of the power supply is electrically connected to the input terminal of the second relay, the output terminal of the second relay is electrically connected to the power bus, the control terminal of the second relay is electrically connected to the MCU, the input terminal of the voltage sensor is connected to the mains, and the output terminal of the voltage sensor The terminal is electrically connected to the MCU, and the MCU is respectively connected to the touch screen and the control bus for communication. The power supply bus supplies power to each of the loads, and the control bus controls and connects each of the loads.

Further, it also includes a rectifier, a storage battery, a third relay, and an inverter. The output end of the first relay is connected to the rectifier, the storage battery, the third relay, and the inverter to connect to the power bus in turn, and the control end of the third relay is connected to the power bus. The MCU is electrically connected.

Further, a remote monitoring computer is also included, and the remote monitoring computer is connected to the MCU through a communication cable.

Furthermore, an alarm is also included, and the alarm is electrically connected with the MCU.

By adopting the aforementioned technical scheme, the beneficial effect of the utility model is that the intelligent power switch device of the utility model detects whether the mains voltage is normal through the voltage sensor. When it is stable, the MCU controls the first relay to open the circuit, informs the control generator to start, and the second relay closes. At this time, the generator supplies power to the load. The MCU collects the usage of each load, calculates the total power of each load, and then controls the selection of the generator. The power generation gear of the generator ensures the maximum utilization rate of the generator and ensures that the load is continuously powered; further, when the generator runs out of fuel, it is also equipped with an emergency battery. When the mains is normally powered, the battery is charged through the mains When the mains power is cut off and the generator power generation is insufficient, the MCU controls the first relay and the second relay to be disconnected, the third relay is closed, and the battery supplies power to the load to ensure that the load does not continue to work; when the mains returns to normal, the second relay, The third relay is disconnected, the first relay is closed, and the commercial power is restored to supply power to the load. The staff can control the first relay, the second relay or the third relay to be disconnected or closed through the touch screen, thereby controlling the power supply mode of the load; further, the staff The power supply of the load can be monitored remotely through the remote monitoring computer and the power supply mode of the load can be switched; further, when the mains power is cut off, the MCU controls the alarm to alarm and notify the staff.

Description of drawings

Fig. 1 is a block diagram of the circuit structure of the utility model.

detailed description

The utility model is further described now in conjunction with accompanying drawing and specific embodiment.

Referring to Figure 1, the utility model provides an intelligent power switching device, including MCU1, generator 2, second relay 3, first relay 4, voltage sensor 5, rectifier 6, battery 7, third relay 8, inverter 9, power bus 10, multiple loads 11, control bus 12, remote monitoring computer 13, alarm 14, touch screen 15.

The input end of the first relay 4 is connected to the mains, the output end of the first relay 4 is connected to the power bus 10, and the control end of the first relay 4 is electrically connected to the MCU1, and the MCU1 controls the starting of the generator 2 and adjusts the power gear of the generator, The power output terminal of the generator 2 is electrically connected to the input terminal of the second relay 3, the output terminal of the second relay 3 is electrically connected to the power bus 10, the control terminal of the second relay 3 is electrically connected to the MCU1, and the voltage sensor 5, the input end is connected to the mains, the output end of the voltage sensor 5 is electrically connected to the MCU1, and the MCU1 is connected to the control bus 12, the remote monitoring computer 13 and the touch screen 15 respectively, and the power bus 10 supplies power to each of the loads 11 respectively. The control bus 12 controls and connects the loads 11 respectively, and the MCU 1 controls the alarm 14 to alarm.

Working principle: Under normal circumstances, MCU1 controls relay K1 to close, relay K2 and relay K3 to open, and the mains supplies power to each of the loads. When the mains power is cut off or the mains voltage may be unstable due to factors such as lightning strikes, the voltage sensor 5 detects that the mains is abnormal and notifies the MCU1, and the MCU1 controls the first relay 4 to open the circuit, and at the same time controls the generator 2 to start, and the second relay 3 to close. At this time, the generator 2 supplies power to each load 11, and the MCU1 collects the usage of each load 11, calculates the total power of each load 11, and then controls and selects the power generation gear of the generator 2 to ensure the maximum utilization rate of the generator 2. , to ensure that each load 11 works without interruption; when the generator 2 runs out of fuel and the motor generates insufficient power, the MCU1 controls the first relay 4 and the second relay 3 to be disconnected, the third relay 8 is closed, and the battery 7 supplies power to each load 11, ensuring Each load 11 works continuously; when the mains power returns to normal, the second relay 3 and the third relay 8 are disconnected, the first relay 4 is closed, and the mains power is restored to supply power to each load 11. The staff can monitor the computer through the touch screen 15 or remotely 13 controls the opening or closing of the first relay 4, the second relay 3 or the third relay 8, thereby controlling the power supply mode of each load 11; when the mains power is cut off, the MCU1 controls the alarm 14 to alarm and notify the staff.

Although the utility model has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that, without departing from the spirit and scope of the utility model defined by the appended claims, changes in form and details may be made. Making various changes to the utility model is within the protection scope of the utility model.

Claims (4)

1. An intelligent power switching device, characterized in that: comprising a generator, an MCU, a voltage sensor, a first relay, a second relay, a touch screen, a plurality of loads, a power bus and a control bus, the first relay input Connect to the mains, the first relay output terminal is connected to the power bus, the first relay control terminal is electrically connected to the MCU, the MCU controls the generator start and adjusts the generator power gear, and the generator power output terminal is connected to the second relay input The terminals are electrically connected, the second relay output terminal is electrically connected to the power bus, the second relay control terminal is electrically connected to the MCU, the voltage sensor input terminal is connected to the mains, and the voltage sensor output terminal is electrically connected to the MCU. The MCU communicates with the touch screen and the control bus, respectively, the power bus supplies power to the loads, and the control bus controls and connects the loads. 2. A kind of intelligent power switching device according to claim 1, characterized in that: it also includes a rectifier, a storage battery, a third relay, and an inverter, and the output end of the first relay is connected to the rectifier, the storage battery, the third relay in sequence The relay and the inverter are connected to the power bus, and the control end of the third relay is electrically connected to the MCU. 3. An intelligent power switching device according to claim 1 or 2, further comprising a remote monitoring computer connected to the MCU through a communication cable. 4. An intelligent power switching device according to claim 3, further comprising an alarm, and the alarm is electrically connected to the MCU.