Power distribution apparatus and power distribution system

Abstract

This application relates to a power distribution device and a power supply and distribution system. The power distribution device is equipped with a controller and at least two first switching devices. One end of the first switching device is connected to at least two power sources through the input port of the power distribution device, and the other end of the first switching device is connected to the electrical equipment through the output port of the power distribution device. The control terminal of the first switching device is connected to the controller. By configuring a controller and first switching devices in the power distribution device, when any power source malfunctions, the controller can control at least one first switching device to disconnect the connection between the electrical equipment. This ensures that the remaining power source can continue to supply power to the electrical equipment through the power distribution device, thereby reducing the load on the back end and ensuring the stability of the power supply. It eliminates the need for additional auxiliary units and reduces costs.

Description

Technical Field

[0001] This application relates to the field of electronic power technology, and in particular to a power distribution device and a power supply and distribution system. Background Technology

[0002] Currently, generator sets are typically used to power equipment in operation scenarios; however, in order to ensure the stability of power supply, additional auxiliary generator sets are usually added, resulting in higher costs. Utility Model Content

[0003] Therefore, it is necessary to provide a power distribution equipment and power supply system that can reduce costs.

[0004] In a first aspect, this application provides a power distribution device, comprising:

[0005] At least two first switching devices, one end of the first switching device is connected to at least two power sources through the input port of the power distribution equipment, and the other end of the first switching device is connected to the power consumption equipment through the output port of the power distribution equipment;

[0006] The controller is connected to the control terminal of the first switching device and is used to control the first switching device to disconnect from the electrical equipment.

[0007] In one embodiment, the power distribution equipment further includes:

[0008] The drive device has its control terminal connected to the controller, and its output terminal connected to the control terminal of each first switch device, for driving the first switch device to enter the closed or open state.

[0009] In one embodiment, the driving device includes at least two driving components, each driving component being configured in a one-to-one correspondence with a first switching device. The output terminal of the driving component is connected to the control terminal of the corresponding first switching device, and the control terminal of the driving component is connected to a controller.

[0010] In one embodiment, the drive assembly includes a switch module and a motor module, one end of the switch module is connected to a controller, the other end of the switch module is connected to one end of the motor module, and the other end of the motor module is connected to the control terminal of the first switching device.

[0011] In one embodiment, the power distribution equipment further includes a transformer, one end of which is connected to one end of the first switchgear, and the other end of which is connected to the power input terminal of each switch module.

[0012] In one embodiment, the transformer includes a transformer and a DC power supply, wherein one end of the transformer is connected to one end of the first switching device, the other end of the transformer is connected to one end of the DC power supply, and the other end of the DC power supply is connected to the power supply input terminals of each switching module.

[0013] In one embodiment, the power distribution equipment further includes:

[0014] The second switchgear has one end connected to one end of the first switchgear via a busbar, and the other end connected to the power supply via an input port. The control end of the second switchgear is connected to the controller.

[0015] In one embodiment, the power distribution equipment further includes a measuring device disposed in the circuit between the input port and the other end of the second switching device, and the signal output terminal of the measuring device is connected to the controller.

[0016] In one embodiment, the measuring device includes at least two measuring components, each corresponding to a power supply. Each measuring component is disposed in the circuit between the input port and the other end of the second switching device, and the signal output terminal of the measuring component is connected to the controller.

[0017] In one embodiment, a measuring device is disposed within the second switching device, the measuring device being disposed in the circuit of the second switching device for connecting to a power supply, and the signal output terminal of the measuring device is connected to a controller.

[0018] In one embodiment, the measuring device includes at least two measuring components, each corresponding to a power supply. Each measuring component is disposed in a circuit of a second switching device for connecting to the power supply, and the signal output terminal of the measuring component is connected to a controller.

[0019] Secondly, this application also provides a power supply and distribution system, which includes the power distribution equipment as described above.

[0020] The aforementioned power distribution equipment and power supply system include a controller and at least two first switching devices within the power distribution equipment. One end of each first switching device is connected to at least two power sources via the input port of the power distribution equipment, and the other end is connected to the power-consuming equipment via the output port of the power distribution equipment. The control terminal of the first switching device is connected to the controller. By configuring a controller and first switching devices within the power distribution equipment, this application allows the controller to control at least one first switching device to disconnect the connection between the power-consuming equipment when any power source experiences an abnormality. This ensures that the remaining power source can continue to supply power to the power-consuming equipment through the power distribution equipment. Compared to the traditional method of ensuring power supply stability by adding auxiliary units, this method reduces the downstream load to ensure power supply stability, eliminating the need for additional auxiliary units and lowering costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a structural block diagram of the power distribution equipment in one embodiment;

[0023] Figure 2 This is a structural block diagram of the power distribution equipment in another embodiment;

[0024] Figure 3 This is a schematic diagram of the power distribution equipment in one embodiment;

[0025] Figure 4 This is an application scenario diagram of a power supply and distribution system in one embodiment. Detailed Implementation

[0026] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0028] It is understood that the terms "first," "second," etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first switching device may be referred to as a second switching device, and similarly, a second switching device may be referred to as a first switching device. Both the first switching device and the second switching device are switching devices, but they are not the same switching device.

[0029] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0030] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0031] Currently, generator sets are typically used to power equipment in operation scenarios. To ensure the stability of power supply, it is necessary to increase the number of backup generator sets. However, increasing the number of backup generator sets means increasing equipment costs. If not enough backup generator sets are configured, an abnormality in one power source will cause all the remaining generator sets to shut down due to excessive load on the back end.

[0032] The power distribution equipment and power supply system provided in this application embodiment are equipped with a controller and a first switching device. When any power supply is abnormal, the controller can control at least one first switching device to disconnect the connection between the electrical equipment, thereby ensuring that the remaining power supply can continue to supply power to the electrical equipment through the power distribution equipment. Compared with the traditional method of ensuring the stability of power supply by adding auxiliary units, the stability of power supply is ensured by reducing the back-end load, eliminating the need to add auxiliary units and reducing costs.

[0033] In one exemplary embodiment, refer to Figure 1 This application provides a power distribution device, including:

[0034] At least two first switching devices 110, one end of the first switching device 110 is connected to at least two power sources through the input port of the power distribution equipment, and the other end of the first switching device is connected to the power-consuming equipment through the output port of the power distribution equipment;

[0035] The controller 120 is connected to the control terminal of the first switchgear 110 and is used to control the first switchgear 110 to disconnect from the electrical equipment.

[0036] The number of output ports and input ports in the power distribution equipment can be set according to the actual situation, and is not limited in this embodiment, as long as there is at least one input port and at least two output ports; the number of power supplies can be set according to the actual situation, and is not limited in this embodiment, as long as there are at least two power supplies; the number of first switching devices can be set according to the actual situation, and is not limited in this embodiment.

[0037] Specifically, such as Figure 1As shown, electrical energy from the power supply can be transferred to the first switchgear 110 through the busbar (common busbar) in the power distribution equipment. When the first switchgear 110 is in the closed state, the electrical energy on the busbar can flow into the electrical equipment through the first switchgear 110, and the electrical equipment can operate normally after receiving the electrical energy.

[0038] The controller 120 can acquire the operating status of the power supply and, when it detects that any power supply is in an abnormal state, control at least one first switching device 110 to disconnect from the electrical equipment, thereby reducing the back-end load and ensuring that the remaining power supply can continue to provide stable power supply, thus avoiding the situation where the power supply that was originally in a normal state shuts down due to excessive back-end load.

[0039] For example, the controller 120 can be connected to each power supply to obtain the operating status of each power supply. It can be understood that the way the controller 120 is connected to each power supply can be set according to the actual situation, as long as the controller 120 can obtain the operating status of each power supply.

[0040] It should be noted that the number of electrical devices connected to the output port can be set according to the actual situation, and is not limited in this embodiment. When the controller 120 controls the connection between any first switch device 110 and the electrical device, it can be understood that the first switch device 110 is disconnected from all electrical devices connected to the first switch device 110.

[0041] The power distribution equipment provided in this application embodiment allows the controller to disconnect the connection between the first switching device and the power-consuming equipment when it detects that any power source is in an abnormal state. This ensures that the remaining power source can continue to supply power to the power-consuming equipment through the power distribution equipment. Compared with the traditional method of adding auxiliary units to ensure the stability of power supply, this application reduces the back-end load by setting up the first switching device, maintaining the stability of power supply without adding auxiliary units, thus reducing costs.

[0042] In one embodiment, such as Figure 2 As shown, the power distribution equipment also includes:

[0043] The second switchgear 130 has one end connected to one end of the first switchgear 110 via a busbar, and the other end of the second switchgear 120 is connected to the power supply via an input port. The control terminal of the second switchgear 130 is connected to the controller 120.

[0044] The number of second switching devices can be set according to actual conditions. The second switching devices can be used to control the on / off of the power supply. It can be understood that the controller can control the on / off of each power supply separately through a second switching device. The controller can also control the on / off of a single power supply connected to it through a second switching device. This is not limited in the embodiments of this application.

[0045] Specifically, such as Figure 2 As shown, the controller 120 can control the on / off state of the power supply connected to the power distribution equipment by controlling the second switch device 130. When the controller 120 detects that any power supply is in an abnormal state, the controller 120 can disconnect the connection with the power supply by controlling the second switch device 130 to avoid the power supply affecting the subsequent circuit. It can be understood that when the power supply returns to the normal state, the controller 120 can reconnect with the power supply by controlling the second switch device 130. Alternatively, the user can manually control the second switch device 130 to enter the closed state to reconnect with the power supply.

[0046] For example, both the first and second switching devices can be implemented using switch cabinets, which will not be elaborated upon in the embodiments of this application.

[0047] In this embodiment of the application, by configuring a second switching device in the power distribution equipment, the controller can control the second switching device to disconnect the connection with the corresponding power supply, thereby preventing the power supply in an abnormal state from affecting the subsequent circuit and improving safety.

[0048] In one embodiment, the power distribution equipment further includes:

[0049] The drive device has its control terminal connected to the controller, and its output terminal connected to the control terminal of each first switch device, for driving the first switch device to enter the closed or open state.

[0050] Specifically, the controller can output control commands to the drive device, and the drive device responds to the received control commands by driving the first switching device into a closed or open state.

[0051] For example, the output terminal of the drive device can also be connected to the control terminal of each second switch device, and the controller can drive the second switch device to enter the closed state or the open state by controlling the drive device.

[0052] In this embodiment of the application, by providing a driving device in the power distribution equipment, the controller drives the first switching device to enter the disconnect state by controlling the driving device, thereby disconnecting the connection between the first switching device and the power-consuming equipment, thus ensuring that the remaining power can continue to supply power to the power-consuming equipment through the power distribution equipment, and maintaining the stability of the power supply.

[0053] In one embodiment, the driving device includes at least two driving components, each driving component being configured in a one-to-one correspondence with a first switching device. The output terminal of the driving component is connected to the control terminal of the corresponding first switching device, and the control terminal of the driving component is connected to a controller.

[0054] The number of driver components can be set according to the actual situation, as long as the number is at least two.

[0055] Specifically, the controller can drive the corresponding first switching device to enter a closed or open state by controlling the drive component.

[0056] It should be noted that the drive component can also be configured to correspond one-to-one with the second switch device. The output terminal of the drive component is connected to the control terminal of the corresponding second switch device, and the control terminal of the drive component is connected to the controller. The controller can also drive the corresponding second switch device to enter the closed or open state by controlling the drive component.

[0057] For example, a circuit breaker can be used in the first switching device to connect the electrical equipment, and a circuit breaker can be used in the second switching device to connect the power supply. When the circuit breaker in the first switching device is closed, the first switching device enters the closed state; when the circuit breaker in the first switching device is open, the first switching device enters the open state. The second switching device follows the same principle, which will not be elaborated here. At the same time, position sensors can also be configured in the first and second switching devices. The position sensors are used to detect the current open / closed state of the circuit breaker and transmit the detected open / closed state to the controller to facilitate the subsequent stable power supply.

[0058] In one embodiment, the drive assembly includes a switch module and a motor module, one end of the switch module is connected to a controller, the other end of the switch module is connected to one end of the motor module, and the other end of the motor module is connected to the control terminal of the first switching device.

[0059] The types of switch modules and motor modules can be set according to actual conditions, and are not limited in this embodiment.

[0060] Specifically, the controller can output a first electrical signal to the switch module, and the switch module responds to the received first electrical signal by entering a closed state. At this time, the motor module drives the first switching device to enter a closed state. It can be understood that the controller can also output a second electrical signal to the switch module, and the switch module responds to the received second electrical signal by entering an open state. At this time, the first switching device enters an open state.

[0061] In one embodiment, the power distribution equipment further includes a transformer, one end of which is connected to one end of the first switchgear, and the other end of which is connected to the power input terminal of each switch module.

[0062] Specifically, the transformer is used to transform the electrical energy on the bus and input the transformed electrical energy to each switch module to enable the switch modules to operate normally.

[0063] In this embodiment of the application, the power distribution equipment is equipped with a transformer device, which is used to transform the electrical energy on the bus and input the transformed electrical energy to each switch module to realize the power supply to the switch module. This allows the subsequent switch module to control the first switch equipment to enter the corresponding state through the drive module according to the received electrical signal, thereby maintaining the stability of the power supply.

[0064] In one embodiment, the transformer includes a transformer and a DC power supply, wherein one end of the transformer is connected to one end of the first switching device, the other end of the transformer is connected to one end of the DC power supply, and the other end of the DC power supply is connected to the power supply input terminals of each switching module.

[0065] Specifically, the electrical energy required by the switching module is provided by the DC power supply, which is supplied by the transformer drawing power from the bus and then transforming and rectifying it.

[0066] In one embodiment, the power distribution equipment further includes a measuring device disposed in the circuit between the input port and the other end of the second switching device, and the signal output terminal of the measuring device is connected to the controller.

[0067] Specifically, the power distribution equipment is equipped with a measuring device to acquire power status information, and the measuring device outputs the acquired status information to the controller through the signal output terminal.

[0068] In this embodiment of the application, by setting a measuring device in the power distribution device, the controller can control the corresponding first switching device to disconnect from the power-consuming equipment according to the status information transmitted by the measuring device, thereby maintaining power stability and reducing costs.

[0069] In one embodiment, the measuring device includes at least two measuring components, each corresponding to a power supply. Each measuring component is disposed in the circuit between the input port and the other end of the second switching device, and the signal output terminal of the measuring component is connected to the controller.

[0070] The type and number of measuring components can be set according to the actual situation. In this embodiment, the measuring components include one or more of the following: ammeter, voltmeter and frequency meter.

[0071] Specifically, the measurement component can acquire the status information of the power supply connected to it, and the measurement component outputs the acquired status information to the controller through the signal output terminal.

[0072] In one embodiment, a measuring device is disposed within the second switching device, the measuring device being disposed in the circuit of the second switching device for connecting to a power supply, and the signal output terminal of the measuring device is connected to a controller.

[0073] Specifically, the second switchgear is equipped with a measuring device, which is used to acquire power supply status information. The measuring device outputs the acquired status information to the controller through the signal output terminal.

[0074] In this embodiment of the application, by setting a measuring device in the power distribution device, the controller can control the corresponding first switching device to disconnect from the power-consuming equipment according to the status information transmitted by the measuring device, thereby maintaining power stability and reducing costs.

[0075] In one embodiment, the measuring device includes at least two measuring components, each corresponding to a power supply. Each measuring component is disposed in a circuit of a second switching device for connecting to the power supply, and the signal output terminal of the measuring component is connected to a controller.

[0076] The type and number of measuring components can be set according to the actual situation. In this embodiment, the measuring components include one or more of the following: ammeter, voltmeter and frequency meter.

[0077] Specifically, the measurement component can acquire the status information of the power supply connected to it, and the measurement component outputs the acquired status information to the controller through the signal output terminal.

[0078] To facilitate understanding by those skilled in the art, the following description of the power distribution equipment is provided with reference to a specific example. Figure 3 The first switchgear can be an output switchgear, and the second switchgear can be an input switchgear. Figure 3 The following is an example of a power distribution system consisting of two input switch cabinets and three output switch cabinets.

[0079] Output switchgear can be divided into switchgear for supplying power to critical electrical equipment and switchgear for supplying power to non-critical electrical equipment. Both input and output switchgear include at least one input port, one output port, and a control mechanism for controlling the closing or opening of internal circuit breakers (corresponding to...). Figure 3 The drive components in the circuit, where the switching module takes an electromagnetic switch as an example. The input port of the power distribution equipment is connected to the input port of the input switch cabinet, and one or more devices, such as ammeters, voltmeters, and frequency meters, are used to monitor the power supply status. That is, the measuring components are set in the circuit between the input port of the power distribution equipment and the input switch cabinet or inside the input switch cabinet. The output port of the input switch cabinet is connected to the busbar (corresponding to...). Figure 3(The bold black line in the image) At the same time, the input port of the output switchgear is also connected to the busbar. When the input switchgear is closed, the power supply can be transferred to the busbar. When the output switchgear is also closed, the power supply can be transferred to the electrical equipment connected to the output port of the output switchgear. The electrical equipment can then operate normally after being powered on.

[0080] The current, voltage, frequency, and other signals (status information) monitored by the measuring components are used to control the opening or closing of circuit breakers in the output switchgear. Furthermore, a controller can be added to the power distribution equipment. The measuring components and position sensors transmit one or more of the current, voltage, frequency signals, and the open / closed position of the circuit breaker to the controller. The controller can then open the output switchgear connected to non-critical electrical equipment according to preset control logic. Additionally, adding a controller also enables remote control of the output switchgear. Before any problems occur with the power supply or generator set, manual intervention can be used to preemptively open one or more output switchgear units, removing unnecessary downstream loads and ensuring the stability of power supply to critical electrical equipment.

[0081] Two power supplies (corresponding) Figure 3 Power supplies 1 and 2 are connected to different input ports of the power distribution equipment via power cables. These input ports are connected to different input switch cabinets. Depending on requirements, at least one or more voltage, current, or frequency monitoring devices are installed on the lines from the input ports to the input switch cabinets. The monitored data signals (status information) can be transmitted to the controller in real time. If an abnormality is detected in the voltage, current, or frequency monitoring of one or more power supplies—for example, if the voltage or frequency deviates from the rated value beyond a preset range, or if the current is close to or exceeds the rated current value—the controller will output a tripping command to one or more drive components of the output switch cabinets used to connect non-critical electrical equipment, thereby controlling the output switch cabinets to trip. Tripping the output switch cabinets cuts off the power supply to the corresponding non-critical downstream electrical equipment, thus preserving the necessary power capacity for critical electrical equipment.

[0082] It should be noted that, Figure 3 The input switchgear can be configured with the same drive components as the output switchgear. Figure 3 Not shown in the image.

[0083] In one exemplary embodiment, this application also provides a power supply and distribution system, which includes the power distribution equipment as described above.

[0084] Specifically, the power supply and distribution system can be applied in different work scenarios, and is not limited in the embodiments of this application. When the power supply and distribution system provided in the embodiments of this application is used for power work, the power distribution equipment in the power supply and distribution system can control at least one first switching device to disconnect the connection between the power consumption equipment when any power supply is abnormal, so as to ensure that the remaining power supply can continue to supply power to the power consumption equipment through the power distribution equipment, without the need to add auxiliary units, thus reducing costs.

[0085] For example, to facilitate understanding by those skilled in the art, a specific example will be used to illustrate the power supply and distribution system below, referring to... Figure 4 This will be illustrated using the application of power supply and distribution systems in electric fracturing operations at well sites as an example. Figure 4 The electric fracturing operation scenario shown typically consists of a power source, power distribution equipment, and a complete set of electric fracturing equipment (electrical equipment). The power source can be one or more of the following: microgrid, local area network, generator set (including vehicle-mounted mobile generator set), or energy storage system.

[0086] Figure 4 The diagram illustrates three power sources supplying electricity via cables to the input ports of a power distribution system. The output ports of this system then supply power to downstream equipment, including instrumentation equipment, electric fracturing equipment, sand mixing equipment, and blending equipment. After power is supplied to the downstream equipment by generator sets and other power sources, the sand mixing equipment mixes the proppant with the fracturing fluid. The blending equipment adds necessary chemical additives to the fracturing fluid. The mixed liquid is then pumped to the electric fracturing equipment, which pumps the fracturing fluid at high pressure through manifolds to the wellhead and bottom of the well for formation fracturing and enhanced oil and gas production. The instrumentation equipment monitors and controls the operation of each piece of equipment throughout the entire process.

[0087] The power distribution equipment can be equipped with a measuring device to measure the operating status of the power supply. The controller obtains the status information of the power supply through the measuring device and determines the operating status of each power supply based on the status information. When the controller detects that any power supply is in an abnormal state, the controller controls at least one first switching device to disconnect the connection between the power supply and the power-consuming equipment according to the preset control logic, thereby reducing the back-end load. This ensures that when the power supply in an abnormal state shuts down, the remaining power supplies in a normal state can still maintain the power supply, ensuring that the emergency equipment for fracturing construction can operate normally and avoiding well blockage accidents. At the same time, the configuration of the power distribution equipment can reduce the number of backup generator sets, thereby reducing costs.

[0088] In the description of this specification, references to terms such as "some embodiments," "other embodiments," and "ideal embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0089] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0090] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A power distribution apparatus, characterized by, include: At least two first switching devices, one end of the first switching device is connected to at least two power sources through the input port of the power distribution equipment, and the other end of the first switching device is connected to the power-consuming equipment through the output port of the power distribution equipment; The controller is connected to the control terminal of the first switching device and is used to control the first switching device to disconnect from the electrical equipment.

2. The power distribution apparatus of claim 1, wherein The power distribution equipment also includes: A driving device, the control terminal of which is connected to the controller, and the output terminal of which is connected to the control terminal of each of the first switching devices, are used to drive the first switching devices into a closed state or an open state.

3. The power distribution apparatus of claim 2, wherein, The driving device includes at least two driving components, each driving component being configured in a one-to-one correspondence with the first switching device. The output terminal of each driving component is connected to the control terminal of the corresponding first switching device, and the control terminal of each driving component is connected to the controller.

4. The power distribution apparatus of claim 3, wherein, The drive assembly includes a switch module and a motor module. One end of the switch module is connected to the controller, and the other end of the switch module is connected to one end of the motor module. The other end of the motor module is connected to the control terminal of the first switching device.

5. The power distribution apparatus of claim 4, wherein, The power distribution equipment also includes a transformer device, one end of which is connected to one end of the first switchgear, and the other end of which is connected to the power input terminal of each of the switch modules.

6. The power distribution apparatus of claim 5, wherein, The transformer device includes a transformer and a DC power supply unit. One end of the transformer is connected to one end of the first switching device, and the other end of the transformer is connected to one end of the DC power supply unit. The other end of the DC power supply unit is connected to the power supply input terminal of each of the switching modules.

7. The power distribution apparatus of claim 1, wherein The power distribution equipment also includes: A second switchgear, one end of which is connected to one end of the first switchgear via a busbar, and the other end of which is connected to the power supply via the input port. The control terminal of the second switchgear is connected to the controller.

8. The power distribution apparatus of claim 7, wherein, The power distribution equipment also includes a measuring device, which is disposed in the circuit between the input port and the other end of the second switching device, and the signal output terminal of the measuring device is connected to the controller.

9. The power distribution apparatus of claim 8, wherein, The measuring device includes at least two measuring components, each of which is configured in a one-to-one correspondence with the power supply. Each measuring component is disposed in the circuit between the input port and the other end of the second switching device, and the signal output terminal of the measuring component is connected to the controller.

10. The power distribution apparatus of claim 7, wherein, The second switching device is equipped with a measuring device, which is installed in the circuit of the second switching device for connecting to the power supply, and the signal output terminal of the measuring device is connected to the controller.

11. The power distribution apparatus of claim 10, wherein, The measuring device includes at least two measuring components, each of which is configured in a one-to-one correspondence with the power supply. Each measuring component is respectively configured in the circuit of the second switching device for connecting to the power supply, and the signal output terminal of the measuring component is connected to the controller.

12. A power distribution system, characterized by The power supply and distribution system includes the power distribution equipment as described in any one of claims 1 to 11.

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