Power distribution cabinet, power supply equipment and power supply system

Abstract

The invention discloses a power distribution cabinet, power supply equipment and a power supply system, and belongs to the technical field of power supply. According to the power distribution cabinet, a controller is connected with a first contact corresponding to a network side switch, the input end of a power module is used for being connected with power supply equipment, and the output end of the power module is connected with the controller; under the condition that the network side switch is disconnected and the power supply equipment outputs a first target voltage, the power supply module is used for converting the first target voltage and supplying power to the controller, and the controller is used for acquiring a feedback signal of the first contact and determining the on-off state of the bypass switch based on the feedback signal; the first target voltage is smaller than a safety voltage threshold. The power distribution cabinet can judge the on-off state of the bypass switch, effectively reduces safety and electric shock risks, and is simple in wiring and convenient to construct.

Description

Technical Field

[0001] The present application belongs to the technical field of power supply, and in particular relates to a power distribution cabinet, power supply equipment and a power supply system. Background Art

[0002] In the application scenario of the distribution cabinet, in order to ensure the continuity of load power supply, a bypass switch is often designed in the distribution cabinet. When the distribution cabinet fails and cannot supply power, the bypass switch can be closed to allow the power grid to supply power to the load.

[0003] The bypass switch increases the safety risk of the system. After the bypass switch is closed by mistake, if the power supply equipment works in off-grid mode, the voltage may be output outside the distribution cabinet, causing safety and electric shock risks.

[0004] In off-grid scenarios, how to detect the status of the bypass switch and reduce safety regulations and electric shock risks is an urgent problem to be solved in this field. Summary of the invention

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a power distribution cabinet, a power supply device and a power supply system, which can detect the state of a bypass switch and reduce safety regulations and electric shock risks.

[0006] In a first aspect, the present application provides a power distribution cabinet, comprising:

[0007] Controller;

[0008] A distribution line, one end of which is used to connect to a power supply device, and the other end of which is used to connect to a power grid. A grid-side switch is provided at a position of the distribution line close to the power grid, the grid-side switch is connected in parallel with a bypass switch, and the controller is connected to a first contact corresponding to the grid-side switch;

[0009] A power module, wherein an input end of the power module is used to be connected to the power supply device, and an output end of the power module is connected to the controller;

[0010] When the grid-side switch is disconnected and the power supply device outputs a first target voltage, the power module is used to convert the first target voltage to supply power to the controller. The controller is used to obtain a feedback signal of the first contact and determine the open and closed state of the bypass switch based on the feedback signal. The first target voltage is less than the safety voltage threshold.

[0011] According to the power distribution cabinet of the present application, a power module is configured in the power distribution cabinet, and the first contact of the bypass switch is connected to the controller. When the power supply equipment is off-grid, it first outputs a safe first target voltage, which is converted by the power module to power the controller. The controller detects the feedback signal of the first contact and determines the open and closed state of the bypass switch. This can effectively reduce safety regulations and the risk of electric shock. The wiring of the power distribution cabinet is simple and easy to construct.

[0012] According to one embodiment of the present application, the controller is also used to output the opening and closing status of the bypass switch to the power supply device, so that the power supply device stops voltage output when the bypass switch is in a closed state, or outputs a second target voltage when the bypass switch is in an open state, and the second target voltage is greater than the first target voltage.

[0013] According to an embodiment of the present application, a power supply side switch is provided on the distribution line at a position close to the power supply device, and the controller is connected to a second contact corresponding to the power supply side switch.

[0014] According to one embodiment of the present application, the controller is further configured to control the power supply side switch to be opened through the second contact when the bypass switch is in a closed state.

[0015] In a second aspect, the present application provides a power supply device, which is used to be connected to the distribution cabinet described in the first aspect above. When the grid-side switch is disconnected, the power supply device is used to output a first target voltage, and the first target voltage is less than the safety voltage threshold.

[0016] According to the power supply equipment of the present application, the power supply equipment outputs a first target voltage that is less than the safety voltage threshold, and the power module in the distribution cabinet converts the voltage to supply power to the controller. The controller detects the feedback signal of the first contact and determines the open and closed state of the bypass switch. This can effectively reduce safety regulations and electric shock risks, and the wiring of the distribution cabinet and the power supply equipment is simple, which is convenient for construction.

[0017] According to an embodiment of the present application, the power supply device is used to receive the on / off state of the bypass switch output by the controller.

[0018] According to one embodiment of the present application, the power supply device is used to stop voltage output when the bypass switch is in a closed state.

[0019] According to an embodiment of the present application, the power supply device is used to output a second target voltage when the bypass switch is in an off state, and the second target voltage is greater than the first target voltage.

[0020] According to an embodiment of the present application, the power supply device is used to establish the output of the first target voltage in a step mode or a gradual increase mode.

[0021] In a third aspect, the present application provides a power supply system, including:

[0022] The power distribution cabinet as described in the first aspect above;

[0023] A power supply device is connected to the power distribution cabinet.

[0024] According to the power supply system of the present application, a power module is configured in the distribution cabinet, and the first contact of the bypass switch is connected to the controller. When the power supply equipment is off-grid, it first outputs a safe first target voltage, which is converted by the power module to power the controller. The controller detects the feedback signal of the first contact and determines the open and closed state of the bypass switch. This can effectively reduce safety regulations and the risk of electric shock. The wiring of the distribution cabinet is simple and easy to construct.

[0025] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 It is one of the wiring diagrams of the power distribution scenario in the related technology;

[0028] Figure 2 This is the second wiring diagram of the power distribution scenario in the related technology;

[0029] Figure 3 This is one of the structural schematic diagrams of the power distribution cabinet provided in the embodiment of the present application;

[0030] Figure 4 This is the second structural diagram of the power distribution cabinet provided in the embodiment of the present application;

[0031] Figure 5 This is the third structural diagram of the power distribution cabinet provided in the embodiment of the present application;

[0032] Figure 6 This is the fourth structural diagram of the power distribution cabinet provided in the embodiment of the present application;

[0033] Figure 7 This is one of the flowcharts of the power supply system performing safety detection provided in the embodiment of the present application;

[0034] Figure 8This is the second flowchart of the power supply system safety detection provided in the embodiment of the present application;

[0035] Fig. 9 This is one of the schematic diagrams of the output voltage of the power supply device changing over time provided in the embodiment of the present application;

[0036] Fig.10 This is the second schematic diagram of the output voltage of the power supply device changing over time provided in the embodiment of the present application;

[0037] Fig.11 This is the fifth structural diagram of the power distribution cabinet provided in the embodiment of the present application.

[0038] Reference numerals:

[0039] Power distribution cabinet 300 , controller 310 , grid-side switch 321 , bypass switch 322 , first contact 323 , power supply-side switch 324 , second contact 325 , power module 330 . DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0041] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0042] In the application scenario of the distribution cabinet, in order to ensure the continuity of load power supply, a bypass switch is often designed in the distribution cabinet. When the distribution cabinet fails and cannot supply power, the bypass switch can be closed to allow the power grid to supply power to the load.

[0043] The bypass switch increases the safety risk of the system. After the bypass switch is closed by mistake, if the power supply equipment works in off-grid mode, the voltage may be output outside the distribution cabinet, causing safety and electric shock risks.

[0044] In related technologies, such as Figure 1As shown, the bypass switch S4 is connected in parallel with the switch S3 in the power distribution cabinet Box close to the power grid, the feedback contact Contact in the Box is connected to the inverter Device through a signal line, and the state of S4 is detected by the Device.

[0045] The method of connecting Contact to Device is difficult to implement, such as Figure 2 As shown in the figure, in the parallel scenario, the contact needs to be connected to each inverter, and during real-time detection, the Device first outputs the normal working voltage to wake up the Box, and detects the feedback contact signal. At this time, the Device has already output the normal working voltage, which may lead to safety regulations and electric shock risks due to untimely protection.

[0046] The embodiment of the present application provides a power distribution cabinet 300, which can detect the state of the bypass switch 322, reduce safety regulations and electric shock risks, and has simple wiring and is easy to construct.

[0047] The power distribution cabinet 300, power supply equipment and power supply system provided in the embodiment of the present application are described in detail below through specific embodiments and their application scenarios in combination with the accompanying drawings.

[0048] like Figure 3 As shown, the power distribution cabinet 300 of the embodiment of the present application includes: a controller 310 , a power distribution line and a power supply module 330 .

[0049] The controller 310 of the distribution cabinet 300 can monitor electrical parameters such as current, voltage, power, frequency, etc. in real time, and reasonably distribute electrical energy by controlling the operation of devices such as switches, circuit breakers, contactors and fuses of the distribution cabinet 300. It has functions such as overcurrent, overload, circuit breaker and short circuit protection to ensure stable and safe operation of the circuit.

[0050] One end of the distribution line of the distribution cabinet 300 is connected to the power supply equipment on the power supply side, and the other end is connected to the power grid on the grid side. The distribution line is also connected to the load on the load side. The distribution cabinet 300 can distribute the electric energy of the power supply equipment or the power grid to the load for load operation.

[0051] The power supply equipment is a device that can perform AC-DC conversion and voltage conversion on input electrical energy, such as an inverter, a converter, etc.

[0052] In this embodiment, one end of the distribution line is used to connect to the power supply equipment, and the other end of the distribution line is used to connect to the power grid. A grid-side switch 321 is provided on the distribution line near the power grid. The grid-side switch 321 is connected in parallel with the bypass switch 322, and the controller 310 is connected to the first contact 323 corresponding to the grid-side switch 321.

[0053] The bypass switch 322 refers to an electrical device that can implement a bypass function, such as a contactor, a mechanical switch, and the like.

[0054] In actual implementation, when the bypass switch 322 is in a closed state, the electrical connection between the power distribution cabinet 300 and the power grid is conducted.

[0055] It is understandable that when the bypass switch 322 of the power distribution cabinet 300 is in a closed state, if the power supply equipment operates in an off-grid mode, the voltage may be output outside the power distribution cabinet 300, causing safety and electric shock risks.

[0056] It can be understood that when the controller 310 in the distribution cabinet 300 is powered on, the controller 310 can detect the feedback signal of the first contact 323, wherein the feedback signal of the first contact 323 can be a high or low level signal, and the high and low levels can represent the open and closed state of the bypass switch 322.

[0057] In this embodiment, the power distribution cabinet 300 is provided with a power module 330 , an input end of the power module 330 is used to be connected to a power supply device, and an output end of the power module 330 is connected to a controller 310 .

[0058] The power module 330 is a device that can convert input power into power of specific voltage and current to meet the power requirements of different electronic devices.

[0059] In actual implementation, Figure 3 As shown, the input end of the power module 330 can be connected to the power distribution line of the power distribution cabinet 300 to convert the output voltage of the power supply device, such as Figure 4 As shown, the input end of the power module 330 may also be connected to the output end of the power supply device to convert the output voltage of the power supply device.

[0060] In this embodiment, a power module 330 is configured for the power distribution cabinet 300 , and the power module 330 can convert the output voltage of the power supply device to supply power to the controller 310 .

[0061] In actual implementation, Figure 3 As shown, the power module 330 may be located inside the power distribution cabinet 300. Fig.11 As shown, the power module 330 can also be located outside the power distribution cabinet 300 and adjusted in position according to actual installation requirements. The power modules 330 configured in both ways can convert the output voltage of the power supply equipment and supply power to the controller 310.

[0062] The power module 330 in the power distribution cabinet 300 can convert the power input by the power supply device to meet the power demand of the controller 310, start the controller 310 in the power distribution cabinet 300, and the controller 310 can detect the feedback signal of the first contact 323 after powering on.

[0063] When the grid-side switch 321 is disconnected and the power supply device outputs the first target voltage, the power module 330 is used to convert the first target voltage and supply power to the controller 310. The controller 310 is used to obtain a feedback signal from the first contact 323 and determine the open or closed state of the bypass switch 322 based on the feedback signal.

[0064] The first target voltage is less than the safety voltage threshold.

[0065] It can be understood that the safety voltage threshold is the critical voltage value that does not endanger human safety. The safety voltage threshold in different environments is different. For example, the safety voltage threshold in a dry environment may be 36V, and the safety voltage threshold in a humid environment or confined space may be 24V.

[0066] It should be noted that when the power supply device operates in the off-grid mode, the grid-side switch 321 of the power distribution cabinet 300 is disconnected, and the power supply device can supply power to the load through the power distribution cabinet 300.

[0067] In this embodiment, the power supply device operates off-grid. The power supply device first outputs a first target voltage that is less than the safety voltage threshold. The power module 330 converts the first target voltage into a voltage that the controller 310 can work with. The power module 330 can supply power to the controller 310 within the safe voltage input range to reduce safety regulations and electric shock risks. The controller 310 detects the feedback signal of the first contact 323 at the bypass switch 322 to determine the open or closed state of the bypass switch 322.

[0068] It should be noted that when the power supply device outputs a first target voltage that is lower than the safety voltage threshold, the power module 330 converts the first target voltage, and the auxiliary power supply in the power distribution cabinet 300 can support low-voltage startup to power the controller 310.

[0069] In actual implementation, Figure 5 As shown, the power module 330 can convert the voltage of the low voltage AC input to power the controller 310, such as Figure 6 As shown, the power module 330 can also convert the voltage of the low-voltage DC input to provide power for the controller 310 .

[0070] In the embodiment of the present application, the first contact 323 of the bypass switch 322 in the distribution cabinet 300 is connected to the controller 310 instead of the power supply device. There is no need to design a connection line between the first contact 323 and the power supply device. The wiring of the distribution cabinet 300 is simple and the construction difficulty is low. It is suitable for scenarios where multiple machines are connected in parallel. When the power supply device is off-grid, the power supply device first outputs a first target voltage that is less than the safety voltage threshold. The power module 330 provided on the distribution cabinet 300 can supply power to the controller 310 within the safe voltage input range. The controller 310 detects the feedback signal of the first contact 323 to determine the open and closed state of the bypass switch 322. At this time, even if the bypass switch 322 is closed, there will be no safety risk.

[0071] According to the power distribution cabinet 300 provided in the embodiment of the present application, by configuring the power distribution cabinet 300 with a power module 330, the first contact 323 of the bypass switch 322 is connected to the controller 310. When the power supply equipment is off-grid, it first outputs a safe first target voltage, which is converted by the power module 330 to supply power to the controller 310. The controller 310 detects the feedback signal of the first contact 323 to determine the open and closed state of the bypass switch 322, which can effectively reduce safety regulations and electric shock risks. The power distribution cabinet 300 has simple wiring and is easy to construct.

[0072] In some embodiments, the controller 310 is further configured to output the on / off state of the bypass switch 322 to the power supply device, so that the power supply device stops outputting voltage when the bypass switch 322 is in a closed state.

[0073] In this embodiment, the power supply equipment operates off-grid. When the controller 310 determines that the bypass switch 322 is in a closed state, the controller 310 transmits the information that the bypass switch 322 is in a closed state to the power supply equipment, and the power supply equipment stops outputting voltage. This can avoid outputting voltage outside the distribution cabinet 300, causing safety risks and electric shock risks, and can also avoid the power supply equipment from operating under abnormal conditions, thereby reducing the failure rate of the power supply equipment.

[0074] In some embodiments, the controller 310 is further configured to output the on / off state of the bypass switch 322 to the power supply device, so that the power supply device outputs a second target voltage greater than the first target voltage when the bypass switch 322 is in an off state.

[0075] In this embodiment, the power supply device operates off-grid, and the power supply device first outputs a first target voltage that is less than the safety voltage threshold so that the power module 330 supplies power to the controller 310. When the controller 310 determines that the bypass switch 322 is in the disconnected state, the controller 310 transmits the information that the bypass switch 322 is in the disconnected state to the power supply device, and the power supply device outputs a second target voltage for normal operation of the off-grid operation.

[0076] It can be understood that the first target voltage output by the power supply device is converted by the power module 330 to power the controller 310, for example, the first target voltage is 25V, and the second target voltage output by the power supply device can be used for load operation, for example, the second target voltage is 220V.

[0077] It should be noted that a communication connection can be established between the distribution cabinet 300 and the power supply equipment. After determining the open or closed state of the bypass switch 322, the controller 310 outputs the open or closed state of the bypass switch 322 to the power supply equipment. When the bypass switch 322 is in a closed state, the power supply equipment stops outputting voltage. When the bypass switch 322 is in an open state, the power supply equipment increases the output voltage to the normal operating voltage for off-grid operation.

[0078] In some embodiments, a power supply side switch 324 is provided on the distribution line near the power supply device, and the controller 310 is connected to a second contact 325 corresponding to the power supply side switch 324 .

[0079] Among them, when the power supply side switch 324 is in the open state, the electrical connection between the power supply equipment and the distribution cabinet 300 is disconnected. When the power supply side switch 324 is in the closed state, the electrical connection between the power supply equipment and the distribution cabinet 300 is connected, and the power supply equipment can supply power to the load.

[0080] It is understandable that when the controller 310 in the power distribution cabinet 300 is powered on, the controller 310 can control the on / off state of the power supply side switch 324 through the second contact 325 .

[0081] In some embodiments, the controller 310 is further configured to control the power supply side switch 324 to be opened through the second contact 325 when the bypass switch 322 is in a closed state.

[0082] In this embodiment, the power supply equipment operates off-grid. When the controller 310 determines that the bypass switch 322 is in a closed state, the controller 310 controls the power supply side switch 324 to open through the second contact 325, thereby disconnecting the electrical connection between the power supply equipment and the distribution cabinet 300, thereby avoiding outputting voltage outside the distribution cabinet 300 and causing safety risks and electric shock risks.

[0083] It can be understood that the controller 310 is connected to the second contact 325 corresponding to the power supply side switch 324, and the distribution cabinet 300 does not need to establish a communication connection with the power supply equipment, which can effectively avoid outputting voltage outside the distribution cabinet 300 and reduce the safety regulations and electric shock risks of the distribution cabinet 300.

[0084] An embodiment of the present application also provides a power supply device, which is used to be connected to the above-mentioned distribution cabinet 300. When the grid-side switch 321 is disconnected, the power supply device is used to output a first target voltage, and the first target voltage is less than the safety voltage threshold.

[0085] The power supply equipment is a device that can perform AC-DC conversion and voltage conversion on input electrical energy, such as an inverter, a converter, etc.

[0086] In this embodiment, the power supply equipment is connected to one end of the distribution line in the distribution cabinet 300, and the other end of the distribution line is used to connect to the power grid. A grid-side switch 321 is provided at a position close to the power grid on the distribution line. The grid-side switch 321 is connected in parallel with the bypass switch 322, and the controller 310 is connected to the first contact 323 corresponding to the grid-side switch 321.

[0087] It should be noted that when the power supply device operates in the off-grid mode, the grid-side switch 321 of the power distribution cabinet 300 is disconnected, and the power supply device can supply power to the load through the power distribution cabinet 300.

[0088] When the power supply equipment is off-grid, it first outputs a first target voltage that is less than the safety voltage threshold. The power module 330 of the distribution cabinet 300 converts the first target voltage into a voltage that the controller 310 of the distribution cabinet 300 can work on. The power module 330 can supply power to the controller 310 within the safe voltage input range to reduce safety regulations and electric shock risks. The controller 310 detects the feedback signal of the first contact 323 at the bypass switch 322 to determine the open or closed state of the bypass switch 322.

[0089] According to the power supply equipment provided in the embodiment of the present application, the power supply equipment outputs a first target voltage that is less than the safety voltage threshold, and the power module 330 in the distribution cabinet 300 converts the voltage into power for the controller 310. The controller 310 detects the feedback signal of the first contact 323 and determines the open and closed state of the bypass switch 322. This can effectively reduce safety regulations and electric shock risks, and the wiring between the distribution cabinet 300 and the power supply equipment is simple, which is convenient for construction.

[0090] In some embodiments, the power supply device is used to receive the on / off status of the bypass switch 322 output by the controller 310 .

[0091] A communication connection can be established between the power distribution cabinet 300 and the power supply device. After determining the on / off state of the bypass switch 322 , the controller 310 outputs the on / off state of the bypass switch 322 to the power supply device.

[0092] In some embodiments, the power supply device is configured to stop voltage output when the bypass switch 322 is in a closed state.

[0093] In this embodiment, the power supply equipment operates off-grid. When the controller 310 determines that the bypass switch 322 is in a closed state, the controller 310 transmits the information that the bypass switch 322 is in a closed state to the power supply equipment, and the power supply equipment stops outputting voltage. This can avoid outputting voltage outside the distribution cabinet 300, causing safety risks and electric shock risks, and can also avoid the power supply equipment from operating under abnormal conditions, thereby reducing the failure rate of the power supply equipment.

[0094] In some embodiments, the power supply device is configured to output a second target voltage when the bypass switch 322 is in an off state, and the second target voltage is greater than the first target voltage.

[0095] In this embodiment, the power supply device operates off-grid, and the power supply device first outputs a first target voltage that is less than the safety voltage threshold so that the power module 330 supplies power to the controller 310. When the controller 310 determines that the bypass switch 322 is in the disconnected state, the controller 310 transmits the information that the bypass switch 322 is in the disconnected state to the power supply device, and the power supply device outputs a second target voltage for normal operation of the off-grid operation.

[0096] Two specific embodiments are described below.

[0097] like Figure 7 As shown, the power supply equipment detects the start signal of off-grid operation and determines whether the start time is met.

[0098] When the startup time is met, the power supply device starts up and outputs the first target voltage V1 . The power module 330 in the power distribution cabinet 300 performs voltage conversion to supply power to the controller 310 .

[0099] The controller 310 of the power distribution cabinet 300 detects the feedback signal of the first contact 323 to determine the open or closed state of the bypass switch 322 .

[0100] When the bypass switch 322 is in the off state, the power distribution cabinet 300 feeds back a signal to the power supply device, and the power supply device can output the second target voltage V3, and the power supply device operates normally off the grid.

[0101] When the bypass switch 322 is in a closed state, the power distribution cabinet 300 feeds back a signal to the power supply equipment, and the power supply equipment stops outputting, thereby avoiding outputting voltage outside the power distribution cabinet 300, effectively reducing safety regulations and electric shock risks, and preventing the power supply equipment from operating in abnormal conditions.

[0102] like Figure 8 As shown, the power supply equipment detects the start signal of off-grid operation and determines whether the start time is met.

[0103] When the startup time is met, the power supply device starts up and outputs the first target voltage V1 . The power module 330 in the power distribution cabinet 300 performs voltage conversion to supply power to the controller 310 .

[0104] The controller 310 of the power distribution cabinet 300 detects the feedback signal of the first contact 323 to determine the open or closed state of the bypass switch 322 .

[0105] When the bypass switch 322 is in the off state, the power distribution cabinet 300 feeds back a signal to the power supply device, and the power supply device can output the second target voltage V3, and the power supply device operates normally off the grid.

[0106] When the bypass switch 322 is in a closed state, the controller 310 of the power distribution cabinet 300 controls the power supply side switch 324 to be disconnected, thereby preventing the voltage from being output outside the power distribution cabinet 300, thereby effectively reducing safety regulations and electric shock risks.

[0107] In some embodiments, the power supply device is used to establish an output of the first target voltage in a gradual increase mode.

[0108] The gradual rise mode refers to the power supply device establishing the output of the first target voltage according to a certain slope within a certain period of time.

[0109] For example, Fig. 9 As shown, V1 is the first target voltage, V2 is the safety voltage threshold, and V3 is the second target voltage.

[0110] In this embodiment, the power supply device establishes a V1 output less than V2 according to a certain slope during the period from t1 to t2. During the period from t2 to t3, the power module 330 performs voltage conversion, and the controller 310 is powered on to detect the feedback signal of the first contact 323.

[0111] When the controller 310 determines that the bypass switch 322 is in an open state, the power supply device establishes the output of V3; when the controller 310 determines that the bypass switch 322 is in a closed state, the power supply device can stop the voltage output.

[0112] In some embodiments, the power supply device is used to establish an output of the first target voltage in a step mode.

[0113] The step mode refers to the power supply device establishing the output of the first target voltage in a very short time.

[0114] For example, Fig.10 As shown, V1 is the first target voltage, V2 is the safety voltage threshold, and V3 is the second target voltage.

[0115] In this embodiment, t1 / t2 represents an extremely short time. The power supply device first establishes a V1 output that is less than V2 in an extremely short time. During the period from t2 to t3, the power module 330 performs voltage conversion, and the controller 310 is powered on to detect the feedback signal of the first contact 323.

[0116] When the controller 310 determines that the bypass switch 322 is in an open state, the power supply device establishes the output of V3; when the controller 310 determines that the bypass switch 322 is in a closed state, the power supply device can stop the voltage output.

[0117] The embodiment of the present application also provides a power supply system.

[0118] The power supply system includes the power distribution cabinet 300 and power supply equipment as described above, and the power supply equipment is connected to the power distribution cabinet 300 .

[0119] The power supply equipment is a device that can perform AC-DC conversion and voltage conversion on input electrical energy, such as an inverter, a converter, etc.

[0120] The power distribution cabinet 300 includes: a controller 310 , a power distribution line and a power supply module 330 .

[0121] The controller 310 of the distribution cabinet 300 can monitor electrical parameters such as current, voltage, power, and frequency in real time. By controlling the operation of devices such as switches, circuit breakers, contactors, and fuses in the distribution cabinet 300, it can reasonably distribute electrical energy and has functions such as overcurrent, overload, circuit breaker, and short circuit protection to ensure stable and safe operation of the circuit.

[0122] One end of the distribution line of the distribution cabinet 300 is connected to the power supply equipment on the power supply side, and the other end is connected to the power grid on the grid side. The distribution line is also connected to the load on the load side. The distribution cabinet 300 can distribute the electric energy of the power supply equipment or the power grid to the load for load operation.

[0123] In this embodiment, one end of the distribution line is used to connect to the power supply equipment, and the other end of the distribution line is used to connect to the power grid. A grid-side switch 321 is provided on the distribution line near the power grid. The grid-side switch 321 is connected in parallel with the bypass switch 322, and the controller 310 is connected to the first contact 323 corresponding to the grid-side switch 321.

[0124] The bypass switch 322 refers to an electrical device that can implement a bypass function, such as a contactor, a mechanical switch, and the like.

[0125] In this embodiment, the power distribution cabinet 300 is provided with a power module 330 , an input end of the power module 330 is used to be connected to a power supply device, and an output end of the power module 330 is connected to a controller 310 .

[0126] The power module 330 is a device that can convert input power into power of specific voltage and current to meet the power requirements of different electronic devices.

[0127] The power module 330 in the power distribution cabinet 300 can convert the power input by the power supply device to meet the power demand of the controller 310 , start the controller 310 in the power distribution cabinet 300 , and the controller 310 can detect the feedback signal of the first contact 323 .

[0128] When the grid-side switch 321 is disconnected and the power supply device outputs the first target voltage, the power module 330 is used to convert the first target voltage and supply power to the controller 310. The controller 310 is used to obtain a feedback signal from the first contact 323 and determine the open or closed state of the bypass switch 322 based on the feedback signal.

[0129] The first target voltage is less than the safety voltage threshold.

[0130] In this embodiment, the power supply device operates off-grid. The power supply device first outputs a first target voltage that is less than the safety voltage threshold. The power module 330 converts the first target voltage into a voltage that the controller 310 can work with. The power module 330 can supply power to the controller 310 within the safe voltage input range to reduce safety regulations and electric shock risks. The controller 310 detects the feedback signal of the first contact 323 at the bypass switch 322 to determine the open or closed state of the bypass switch 322.

[0131] According to the power supply system provided in the embodiment of the present application, by configuring the power module 330 for the distribution cabinet 300, the first contact 323 of the bypass switch 322 is connected to the controller 310. When the power supply equipment is off-grid, it first outputs a safe first target voltage, which is converted by the power module 330 to supply power to the controller 310. The controller 310 detects the feedback signal of the first contact 323 to determine the open and closed state of the bypass switch 322, which can effectively reduce safety regulations and electric shock risks. The wiring of the distribution cabinet 300 is simple and easy to construct.

[0132] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0133] In the description of the present application, “plurality” means two or more.

[0134] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0135] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0136] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

[0137] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0138] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A power distribution cabinet, characterized in that: include: Controller; A distribution line, one end of which is used to connect to a power supply device, and the other end of which is used to connect to a power grid. A grid-side switch is provided at a position of the distribution line close to the power grid, the grid-side switch is connected in parallel with a bypass switch, and the controller is connected to a first contact corresponding to the grid-side switch; A power module, wherein an input end of the power module is used to be connected to the power supply device, and an output end of the power module is connected to the controller; When the grid-side switch is disconnected and the power supply device outputs a first target voltage, the power module is used to convert the first target voltage to supply power to the controller. The controller is used to obtain a feedback signal of the first contact and determine the open and closed state of the bypass switch based on the feedback signal. The first target voltage is less than the safety voltage threshold.

2. The power distribution cabinet according to claim 1, characterized in that: The controller is also used to output the opening and closing status of the bypass switch to the power supply device, so that the power supply device stops voltage output when the bypass switch is in a closed state, or outputs a second target voltage when the bypass switch is in an open state, and the second target voltage is greater than the first target voltage.

3. The power distribution cabinet according to claim 1, characterized in that: A power supply side switch is provided on the distribution line at a position close to the power supply device, and the controller is connected to a second contact corresponding to the power supply side switch.

4. The power distribution cabinet according to claim 3, characterized in that: The controller is further configured to control the power supply side switch to be opened through the second contact when the bypass switch is in a closed state.

5. A power supply device, characterized in that: The power supply device is used to be connected to the power distribution cabinet described in any one of claims 1 to 4. When the grid-side switch is disconnected, the power supply device is used to output a first target voltage, and the first target voltage is less than the safety voltage threshold.

6. The power supply device according to claim 5, characterized in that: The power supply device is used to receive the on / off state of the bypass switch output by the controller.

7. The power supply device according to claim 6, characterized in that: The power supply device is used to stop voltage output when the bypass switch is in a closed state.

8. The power supply device according to claim 6, characterized in that: The power supply device is used for outputting a second target voltage when the bypass switch is in an off state, and the second target voltage is greater than the first target voltage.

9. The power supply device according to any one of claims 5 to 8, characterized in that: The power supply device is used to establish the output of the first target voltage in a step mode or a gradual increase mode.

10. A power supply system, characterized in that: include: The power distribution cabinet according to any one of claims 1 to 4; A power supply device is connected to the power distribution cabinet.

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