Flexible digital direct current bus switching device

Abstract

The invention discloses a flexible digital DC bus switching device which comprises a switching mechanism, a cooling mechanism is arranged on the outer side of the switching mechanism, and the bottom of the cooling mechanism is fixedly connected with the top of the switching mechanism; the switching mechanism comprises a device shell, an AC / DC charging system, a DC / DC one-way module, a super-capacitor module and a control loop are installed in the device shell, the AC / DC charging system is electrically connected with the super-capacitor module, the DC / DC one-way module is electrically connected with the super-capacitor module, and the control loop is electrically connected with the super-capacitor module. The flexible digital direct-current bus switching device has the effects that the voltage of the direct-current bus is continuously monitored, when the voltage of the direct-current bus is smaller than or equal to DC210V, the module immediately outputs the DC210V voltage in a constant-voltage mode, power supply assistance is provided for the direct-current bus, a user load device switches a power supply in a zero-sensing mode, the reliability of emergency power supply of a direct-current screen is improved, and a system power supply is prepared.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power devices, in particular to a flexible digital DC bus switching device. BACKGROUND

[0002] At present, DC systems are used in substations, power plants, data center rooms and the like to provide power for control, protection and automatic devices and the like, which is an independent power supply. The DC system is used for the switching of high-voltage switches in normal operation and accident state, relay protection, emergency lighting and the like.

[0003] In normal operation, the charging device bears the regular load and charges the battery pack at the same time to make up for the self-discharge of the battery pack, so that the battery pack is in a standby state with full capacity. In the case of interruption of AC, the battery pack can continue to provide DC power to the load, which can ensure the normal work of protection, control and braking devices.

[0004] 35kV, 110kV substations are usually configured with one group of batteries. When the battery pack is open-circuited, the battery pack is disconnected from the bus operation, and in the case of AC power failure, the device cannot output DC power, which will directly cause the DC bus to lose voltage, resulting in the failure of the DC load to work normally, thereby causing signal interruption, protection refusal and other accidents.

[0005] In view of the above related technology, in the case of only one group of batteries being configured for the DC bus, the battery cannot provide voltage for the DC bus after being disconnected due to various reasons. A flexible digital DC bus switching device is proposed. SUMMARY

[0006] The purpose of the present application is to provide a flexible digital DC bus switching device to solve the problems raised in the background art.

[0007] In order to solve the above technical problems, the present application provides the following technical scheme: a flexible digital DC bus switching device, comprising a switching mechanism, a cooling mechanism is arranged on the outer side of the switching mechanism, and the bottom of the cooling mechanism is fixedly connected with the top of the switching mechanism; The switching mechanism comprises a device shell, an AC / DC charging system, a DC / DC one-way module, a super capacitor module and a control circuit are installed in the inside of the device shell, the AC / DC charging system is electrically connected with the super capacitor module, the DC / DC one-way module is electrically connected with the super capacitor module, and the control circuit is electrically connected with the super capacitor module.

[0008] Preferably, the top of the device shell is provided with an exhaust port, the exhaust port is fixedly connected with an exhaust plate, the front of the device shell is fixedly connected with a control panel, the front of the control panel is fixedly connected with a handle, the bottom of the device shell is fixedly connected with a support pad, the support pad is provided with a plurality of support pads, the plurality of support pads are arranged in a rectangular array, and the plurality of support pads are all made of rubber elastic material.

[0009] Preferably, the front of the control panel is internally provided with an AC switch, a DC switch, an AC input and a DC output.

[0010] Preferably, the switching mechanism comprises an AC input cable, the AC input cable is installed with the AC input, and the AC input is electrically connected with the AC / DC charging system.

[0011] Preferably, the switching mechanism comprises a DC bus, the DC bus is installed with the DC output, the DC output is electrically connected with the DC / DC unidirectional module, and the DC / DC unidirectional module provides unidirectional output for the DC bus.

[0012] Preferably, the DC bus is electrically connected with a battery pack, and the battery pack is electrically connected with the DC / DC unidirectional module.

[0013] Preferably, the cooling mechanism comprises a mounting plate, the mounting plate is provided with two mounting plates, the two mounting plates are fixedly connected with the same device shell, a fan frame is fixedly connected between the two mounting plates, a plurality of fans are fixedly connected inside the fan frame, the output ports of the plurality of fans are fixedly connected with the device shell, and the fans are electrically connected with a control circuit.

[0014] Preferably, the two mounting plates are fixedly connected with a support plate, the back of the support plate is fixedly connected with an electric stretching rod, the back of the electric stretching rod is fixedly connected with an extension plate, the back of the support plate is fixedly connected with a waterproof film, the back of the waterproof film is fixedly connected with the front of the extension plate, and the bottom of the waterproof film is attached to the exhaust plate.

[0015] Preferably, the top of the fan frame is fixedly connected with an alarm, and the alarm is electrically connected with the control circuit.

[0016] Compared with the prior art, the present application has the following beneficial effects: First, the AC / DC charging system of the application can convert alternating current into direct current to charge the super capacitor module; the super capacitor module is used for storing electric energy, the DC / DC one-way module can convert the electric energy in the super capacitor module and provide one-way output, the control loop controls the operation of the entire device, and the power supply switching and auxiliary power supply functions of the device are realized by the cooperative work of each component. The exhaust port and exhaust plate help to discharge the heat inside the device and enhance the heat dissipation effect. The control panel facilitates the user to operate and set parameters of the device. The handle is convenient for the user to move and carry the device. The support pad plays a supporting role for the device, and the rubber elastic material can play a shock absorption effect to protect the internal elements of the device. The battery pack serves as a backup power supply and can supply power to the user's load equipment through the DC bus under the condition of AC power failure. After connecting with the DC / DC one-way module, when the AC power is off, the battery provides power to the load equipment. The switching device does not absorb the battery power due to one-way output, ensuring the independent power supply capability of the battery and having no any influence and interference on the battery discharge function. The switching mechanism can continuously monitor the DC bus voltage during operation. When the DC bus voltage is ≤DC 210V, the module can immediately output DC 210V voltage at constant voltage to provide power assistance for the DC bus, so that the user's load equipment has "zero perception" of switching power supply, improves the reliability of the DC screen emergency power supply, and makes the system power supply have a backup.

[0017] Second, the AC switch of the application is used to control the on-off of alternating current, the DC switch is used to control the on-off of direct current, the AC input is used to connect the alternating current power supply, and the DC output is used to output direct current to provide power for the user's load equipment, which is convenient for the user to control the power input and output of the device. The AC input and DC output both have their own input protection and output protection effects. The output protection and input protection are prior art. The AC input cable is used to introduce the external AC power supply into the device. After being connected through the AC input, it is transmitted to the AC / DC charging system to provide basic AC power for subsequent charging and power conversion. The DC bus is the key channel for the device to supply power to the user's load equipment. The DC output transmits the processed direct current to the DC bus. The DC / DC one-way module ensures that the output direct current is one-way to prevent reverse flow of electric energy and ensure the stability and safety of the DC bus power supply to meet the requirements of the user's load equipment for power supply.

[0018] Third, the present application fixes the air frame through the connecting area between the mounting plate and the device shell, fixes the air frame on the top of the device shell, cools the inside of the device shell through the fan in the air frame, the fan is prior art, has different wind speed gears, and defaults to low speed, when the battery is disconnected due to various reasons, the device detects the disconnection, sends a signal to the fan through the control loop, increases the wind speed of the fan, achieves the effects of cooling and reducing energy consumption cost, fixes the electric stretching rod through the supporting plate, moves the position of the stretching plate through the connection between the electric stretching rod and the stretching plate, adjusts the straightening and folding state of the waterproof film, defaults to the straightening state, covers the top of the exhaust plate to avoid dust or water vapor into the machine, when the battery is disconnected due to various reasons, the device detects the disconnection, sends a signal to the electric stretching rod through the control loop, folds the electric stretching rod to make the waterproof film fold, makes the exhaust plate normally exhaust, and at this time, the fan will also enter the high speed state due to the control loop, generates a large amount of airflow into the machine, can achieve the effect of faster airflow surge, can quickly take away the heat of the machine, the alarm is used for warning the staff, when the battery is disconnected due to various reasons, the device detects the disconnection, the control loop also sends a signal to the alarm to make it work, so that the staff nearby can quickly know. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the overall three-dimensional structure schematic diagram of the present application; Figure 2 is the three-dimensional structure schematic diagram of the switching mechanism of the present application; Figure 3 is the three-dimensional front view structure schematic diagram of the switching mechanism of the present application; Figure 4 is the working process schematic diagram of the present application; Figure 5 is the working process exploded schematic diagram of the present application; Figure 6 is the three-dimensional front view structure schematic diagram of the cooling mechanism of the present application; Figure 7 is the three-dimensional rear view structure schematic diagram of the cooling mechanism of the present application; Among them: 1, switching mechanism; 2, cooling mechanism; 101, device shell; 102, exhaust plate; 103, control panel; 104, handle; 105, supporting pad; 201, mounting plate; 202, air frame; 203, fan; 204, alarm; 205, supporting plate; 206, electric stretching rod; 207, stretching plate; 208, waterproof film. DETAILED DESCRIPTION

[0020] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0021] The present application provides the following technical solutions: Embodiment 1

[0022] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , the flexible digital DC bus switching device, comprising a switching mechanism 1, the outer side of the switching mechanism 1 is provided with a cooling mechanism 2, and the bottom of the cooling mechanism 2 is fixedly connected with the top of the switching mechanism 1. The switching mechanism 1 comprises a device shell 101, and the inside of the device shell 101 is provided with an AC / DC charging system, a DC / DC unidirectional module, a super capacitor module and a control circuit, wherein the AC / DC charging system is electrically connected with the super capacitor module, the DC / DC unidirectional module is electrically connected with the super capacitor module, and the control circuit is electrically connected with the super capacitor module.

[0023] The top of the device shell 101 is provided with an exhaust port, and the exhaust plate 102 is fixedly connected in the exhaust port.

[0024] The front of the control panel 103 is provided with an AC switch, a DC switch, an AC input and a DC output.

[0025] The switching mechanism 1 comprises an AC input cable, and the AC input cable is installed with the AC input.

[0026] The switching mechanism 1 comprises a DC bus, and the DC bus is installed with the DC output.

[0027] The DC bus is electrically connected with a battery pack, and the battery pack is electrically connected with the DC / DC unidirectional module.

[0028] By the above technical scheme, the AC / DC charging system can convert alternating current into direct current to charge the super capacitor module; the super capacitor module is used for storing electric energy; the DC / DC one-way module can convert the electric energy in the super capacitor module and provide one-way output; the control loop controls the operation of the entire device; the components work together to realize the power switching and auxiliary power supply functions of the device; the air outlet and the air baffle 102 help to discharge the heat inside the device and enhance the heat dissipation effect; the control panel 103 facilitates the user to operate and set parameters of the device; the handle 104 is convenient for the user to move and carry the device; the support pad 105 plays a supporting role for the device, and the rubber elastic material can also have the effect of shock absorption and buffering to protect the internal elements of the device; the AC switch is used to control the on-off of alternating current; the DC switch is used to control the on-off of direct current; the AC input is used to connect the alternating current power supply; the DC output is used to output direct current to provide power for the user's load equipment, and the user can control the power input and output of the device; the AC input and the DC output have their own input protection and output protection effects; the output protection and input protection are prior art; the AC input cable is used to introduce the external alternating current power supply into the device; after being connected through the AC input, it is transmitted to the AC / DC charging system to provide basic alternating current energy for subsequent charging and power conversion; the direct current bus is the key channel for the device to supply power to the user's load equipment; the DC output transmits the processed direct current to the direct current bus; the DC / DC one-way module ensures that the output direct current is one-way to prevent the reverse flow of electric energy and ensure the stability and safety of the direct current bus power supply to meet the user's load equipment requirements; the battery pack serves as a backup power supply and can supply power to the user's load equipment through the direct current bus in the event of alternating current power failure; after being connected with the DC / DC one-way module, when the alternating current power fails and the battery provides power to the load equipment, the switching device does not absorb the battery power due to one-way output, ensuring the independent power supply capability of the battery and having no effect and interference on the battery discharge function; the switching mechanism 1 can continuously monitor the direct current bus voltage during operation; when the direct current bus voltage is less than or equal to DC 210V, the module can immediately output DC 210V voltage at a constant voltage to provide power assistance for the direct current bus, so that the user's load equipment has "zero perception" of switching power supply, improves the reliability of the direct current screen emergency power supply, and makes the system power supply have a backup. Example 2

[0029] Please refer to Figure 6 , Figure 7 , the flexible digital DC bus switching device, the cooling mechanism 2 includes two installation plates 201, the two installation plates 201 are fixedly connected with the same device shell 101, a wind frame 202 is fixedly connected between the two installation plates 201, a plurality of fans 203 are fixedly connected inside the wind frame 202, the output ports of the plurality of fans 203 are fixedly connected with the device shell 101, and the fan 203 is electrically connected with the control loop.

[0030] The support plate 205 is fixedly connected between the two mounting plates 201, the back surface of the support plate 205 is fixedly connected with an electric stretching rod 206, the back surface of the electric stretching rod 206 is fixedly connected with an extension plate 207, the back surface of the support plate 205 is fixedly connected with a waterproof film 208, the back surface of the waterproof film 208 is fixedly connected with the front surface of the extension plate 207, and the bottom of the waterproof film 208 is attached to the air exhaust plate 102.

[0031] The top of the air frame 202 is fixedly connected with an alarm 204, and the alarm 204 is electrically connected with the control circuit.

[0032] Through the above technical solution, the air frame 202 is fixed on the top of the device housing 101 by fixing the air frame 202 in the connection area between the mounting plate 201 and the device housing 101, the inside of the device housing 101 is cooled by the fan 203 in the air frame 202, the fan 203 is a prior art, which has different wind speed gears, and the default is low speed, when the battery is disconnected due to various reasons, the device detects the disconnection, sends a signal to the fan 203 through the control circuit, and increases the wind speed of the fan 203, so as to achieve the effect of cooling and reducing energy consumption cost, the electric stretching rod 206 is fixed by the support plate 205, the position of the extension plate 207 is moved through the connection between the electric stretching rod 206 and the extension plate 207, so that the waterproof film 208 can adjust the state of being straightened and folded, and the default is the straightened state, which covers the top of the air exhaust plate 102 to prevent dust or water vapor from entering the inside of the machine, when the battery is disconnected due to various reasons, the device detects the disconnection, sends a signal to the electric stretching rod 206 through the control circuit, the electric stretching rod 206 is folded to make the waterproof film 208 fold, so that the air exhaust plate 102 can normally exhaust air, and at this time, the fan 203 will also enter the high speed state due to the control circuit, a large amount of airflow will be generated to the inside of the machine, and the air exhaust plate 102 can achieve the effect of faster airflow surge, which can quickly take away the heat of the machine, the alarm 204 is used for warning the staff, when the battery is disconnected due to various reasons, the device detects the disconnection, the control circuit also sends a signal to the alarm 204 to make it work, so that the staff nearby can quickly know.

[0033] In use, the AC / DC charging system can convert alternating current into direct current to charge the super capacitor module; the super capacitor module is used to store electrical energy, the DC / DC one-way module can convert the electrical energy in the super capacitor module and provide one-way output, the control circuit controls the operation of the entire device, and the components work together to realize the power switching and auxiliary power supply function of the device. The exhaust port and exhaust plate 102 help to discharge the heat inside the device and enhance the heat dissipation effect. The control panel 103 facilitates user operation and parameter setting of the device. The handle 104 facilitates user movement and transportation of the device. The support pad 105 serves to support the device, and the rubber elastic material can provide shock absorption and buffering effect to protect the internal components of the device. The AC switch is used to control the on-off of alternating current, and the DC switch is used to control the on-off of direct current. The AC input is used to connect the alternating current power supply, and the DC output is used to output direct current to provide power for user load equipment, facilitating user control of the power input and output of the device. The AC input and DC output have their own input protection and output protection effects. The output protection and input protection are prior art. The AC input cable is used to introduce external alternating current power into the device, which is transmitted to the AC / DC charging system after being connected through the AC input, providing basic alternating current energy for subsequent charging and power conversion. The DC bus is the key channel for the device to supply power to user load equipment. The DC output transmits the processed direct current to the DC bus. The DC / DC one-way module ensures that the output direct current is unidirectional, preventing reverse flow of electrical energy and ensuring the stability and safety of the DC bus power supply to meet the power requirements of user load equipment. The battery pack serves as a backup power supply and can supply power to user load equipment through the DC bus in the event of AC power failure. After connecting with the DC / DC one-way module, when the AC power is off and the battery provides power to the load equipment, the switching device does not absorb battery power due to one-way output, ensuring the independent power supply capability of the battery and having no effect and interference on the battery discharge function. The switching mechanism 1 can continuously monitor the DC bus voltage during operation. When the DC bus voltage is ≤DC 210V, the module can immediately output DC 210V voltage for constant voltage, providing power assistance for the DC bus, making the user load equipment "zero-aware" of the power switching, improving the reliability of the DC screen emergency power supply, and ensuring that the system power supply is ready.The air frame 202 is fixed on the top of the device shell 101 by fixing the air frame 202 through the connecting area between the mounting plate 201 and the device shell 101, and cooling the inside of the device shell 101 by the fan 203 in the air frame 202. The fan 203 is prior art, which has different air speed positions, and the default is low speed. When the battery is disconnected due to various reasons, the device detects the disconnection, sends a signal to the fan 203 through the control loop, and increases the air speed of the fan 203 to achieve the effect of cooling and reducing energy consumption cost. The electric stretching rod 206 is fixed by the supporting plate 205, and the position of the stretching plate 207 is moved through the connection between the electric stretching rod 206 and the stretching plate 207, so that the waterproof film 208 can adjust the state of being stretched and being folded. The default is the stretched state, which covers the top of the air exhaust plate 102 to prevent dust or water vapor from entering the machine. When the battery is disconnected due to various reasons, the device detects the disconnection, sends a signal to the electric stretching rod 206 through the control loop, and the electric stretching rod 206 is folded to make the waterproof film 208 fold, so that the air exhaust plate 102 can normally exhaust air. At this time, the fan 203 will also enter the high speed state due to the control loop, and a large amount of airflow will be generated in the machine, which will generate air pressure. Through the air exhaust plate 102, a faster airflow surge effect can be achieved, which can quickly take away the heat of the machine. The alarm 204 is used for warning the staff. When the battery is disconnected due to various reasons, the device detects the disconnection, the control loop also sends a signal to the alarm 204 to make it work, so that the staff nearby can quickly know it.

[0034] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A flexible digital DC bus switching device, comprising a switching mechanism (1), characterized in that, A cooling mechanism (2) is provided on the outside of the switching mechanism (1), and the bottom of the cooling mechanism (2) is fixedly connected to the top of the switching mechanism (1). The switching mechanism (1) includes a device housing (101), and an AC / DC charging system, a DC / DC unidirectional module, a supercapacitor module, and a control circuit are installed inside the device housing (101). The AC / DC charging system is electrically connected to the supercapacitor module, the DC / DC unidirectional module is electrically connected to the supercapacitor module, and the control circuit is electrically connected to the supercapacitor module.

2. The flexible digital DC bus switching device according to claim 1, characterized in that, The device housing (101) has an exhaust vent at the top, and an exhaust plate (102) is fixedly connected inside the exhaust vent. A control panel (103) is fixedly connected to the front of the device housing (101), and a handle (104) is fixedly connected to the front of the control panel (103). A support pad (105) is fixedly connected to the bottom of the device housing (101). Multiple support pads (105) are provided, and the multiple support pads (105) are arranged in a rectangular array. All of the multiple support pads (105) are made of rubber elastic material.

3. The flexible digital DC bus switching device according to claim 2, characterized in that, The control panel (103) has an AC switch, a DC switch, an AC input, and a DC output installed inside the front.

4. The flexible digital DC bus switching device according to claim 1, characterized in that, The switching mechanism (1) includes an AC input cable, which is installed with an AC input and electrically connected to an AC / DC charging system.

5. The flexible digital DC bus switching device according to claim 1, characterized in that, The switching mechanism (1) includes a DC bus, which is installed with a DC output. The DC output is electrically connected to a DC / DC unidirectional module, which provides unidirectional output to the DC bus.

6. The flexible digital DC bus switching device according to claim 5, characterized in that, The DC bus is electrically connected to a battery pack, which is electrically connected to a DC / DC unidirectional module.

7. The flexible digital DC bus switching device according to claim 1, characterized in that, The cooling mechanism (2) includes a mounting plate (201), and there are two mounting plates (201). Both mounting plates (201) are fixedly connected to the same device housing (101). A fan frame (202) is fixedly connected between the two mounting plates (201). Multiple fans (203) are fixedly connected inside the fan frame (202). The output ports of the multiple fans (203) are fixedly connected to the device housing (101). The fans (203) are electrically connected to the control circuit.

8. The flexible digital DC bus switching device according to claim 7, characterized in that, A support plate (205) is fixedly connected between the two mounting plates (201). An electric tension rod (206) is fixedly connected to the back of the support plate (205). An extension plate (207) is fixedly connected to the back of the electric tension rod (206). A waterproof membrane (208) is fixedly connected to the back of the support plate (205). The back of the waterproof membrane (208) is fixedly connected to the front of the extension plate (207). The bottom of the waterproof membrane (208) is attached to the exhaust plate (102).

9. The flexible digital DC bus switching device according to claim 7, characterized in that, An alarm (204) is fixedly connected to the top of the wind frame (202), and the alarm (204) is electrically connected to the control circuit.

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