Generator car off-grid and grid-connected system, method and device

Abstract

The invention discloses an off-grid and grid-connected system, method and device for a generator car, and the generator car is connected with a first switch of an external circuit through a bus wire clamp, the bus wire clamp enables the generator car to be connected with the external circuit in an electrified manner, the power supply of the external circuit does not need to be disconnected firstly, and seamless grid connection is facilitated. The generator car provides electric energy for a load in an external circuit, so that when equipment such as a low-voltage power distribution cabinet or a transformer of the external circuit is maintained and overhauled, the circuit can still work normally, the reliability and continuity of power supply are guaranteed, the power utilization experience of a user is improved, and the power generation control box is connected with the generator car and the first switch. The power generation control box is used for controlling the power generation vehicle to be connected with or disconnected from the external circuit, and the first switch is controlled to control the power supply of the main power supply of the external circuit, so that the electric energy source of the load is controlled, an operator can select the power supply source of the load through the power generation control box, and the convenience and safety of grid connection are improved.

Description

Technical Field

[0001] The present application relates to the technical field of power grid connection, and more specifically, to a system, method and device for connecting a power generation vehicle to the grid. Background Art

[0002] In modern society, science and technology are changing with each passing day. People's lives are closely linked to power supply, which puts forward increasingly stringent requirements on the reliability and sustainability of power supply. In the entire power supply system, low-voltage distribution cabinets and transformers and other equipment play a key role. Their normal operation is the basis for ensuring the power demand of users.

[0003] In order to ensure that these devices can continuously and stably supply power to users, regular maintenance and overhaul of low-voltage distribution cabinets or transformers and other equipment is an essential link. During the maintenance and overhaul process, the power supply mode needs to be converted to power provided by the backup power supply. However, during the power conversion, power outages are often easily caused. This kind of power outage not only has a certain duration, but may also occur repeatedly during multiple maintenance and overhaul processes. The length of the power outage and the number of power outages will vary depending on different equipment and operating conditions, but will directly lead to the user's inability to use electricity normally, greatly affecting the user's normal production and life and the normal development of related businesses.

[0004] Based on this, how to make power conversion go smoothly during the maintenance and overhaul phase, ensure the reliability and continuity of power supply, and improve the user's power experience. Summary of the invention

[0005] In view of the above problems, the present application provides a system, method and device for off-grid connection of power generation vehicles to ensure the reliability and continuity of power supply and improve the user's power consumption experience.

[0006] In order to achieve the above objectives, the specific plan is proposed as follows:

[0007] A generator car off-grid system, comprising a generator car, a generator control box and a busbar clamp, wherein the generator car is connected to a first switch of an external circuit through the busbar clamp, an AC power supply of the external circuit is connected to a load through a third switch, a transformer and the first switch in sequence, the generator control box is connected to the generator car, and the generator control box is connected to the first switch through the busbar clamp;

[0008] The power generation vehicle is used to provide electric energy to the load when connected to the external circuit;

[0009] The power generation control box is used to control the first switch to be turned on or off, and to control the power generation vehicle to be connected to or off the grid with the external circuit after the first switch is turned off.

[0010] Optionally, the power generation vehicle includes a generator and a second switch, and the second switch is configured at the output end of the generator;

[0011] The power generation control box is used to control the second switch to be turned on or off after the first switch is turned off, so as to control the power generation vehicle to be connected to or off the grid with the external circuit.

[0012] Optionally, the power generation vehicle is equipped with a vehicle-mounted control panel, the vehicle-mounted control panel is provided with an aviation plug, and the power generation control box is connected to the aviation plug through a secondary cable;

[0013] The vehicle-mounted control panel is also provided with a power generation output power control module, so that the user can set the power generation output power of the power generation vehicle through the power generation output power control module;

[0014] The vehicle-mounted control panel is also provided with a buzzer for giving an alarm when the generator is abnormal.

[0015] Optionally, the system further comprises a switch operating device, which is connected to the first switch, so that the power generation control box is connected to the switch operating device through a secondary cable and the bus bar clamp, and then connected to the first switch.

[0016] Optionally, the system further comprises a sampling device, wherein the sampling device is connected to an end of the first switch away from the load through an alligator clip, and the sampling device is connected to the power generation control box;

[0017] The sampling device is used to collect circuit data of the external circuit and feed it back to the power generation control box.

[0018] Optionally, the power generation control box is equipped with a control box control panel, and the control box control panel includes a fault reset button, a first switch button, a second switch button, a generator start button and a generator stop button;

[0019] The fault reset button is used to reset the state of the first switch and / or the power generation vehicle after being pressed;

[0020] The first switch button is used to change the state of the first switch after being pressed;

[0021] The second switch button is used to change the state of the second switch of the power generation vehicle after being pressed;

[0022] The generator start button is used to start the generator of the generator vehicle;

[0023] The generator stop button is used to shut down the generator.

[0024] A method for connecting a power generation vehicle to a grid, applied to the above-mentioned power generation vehicle to a grid, comprises:

[0025] In response to an instruction for the power generation vehicle to be connected to the external circuit, a first load power of the external circuit is acquired, and a first power generation output power of the power generation vehicle is determined according to the first load power;

[0026] After the generator vehicle is started with the first power generation output power and operates smoothly, responding to an instruction of the first switch control of the external circuit in the power generation control box, determining the state of the first switch;

[0027] When the first switch is in a closed state, the voltage and frequency of the generator of the generator vehicle are adjusted through the power generation control box based on the current phase, amplitude and frequency of the external circuit;

[0028] When the generator is synchronized with the power grid of the external circuit, controlling the second switch of the generator vehicle to close;

[0029] When the generator reaches the first power generation output power, the first switch is disconnected to connect the generator vehicle to the external circuit;

[0030] In response to an instruction for the power generation vehicle to disconnect from the external circuit, a second load power of the external circuit is acquired, and a second power generation output power of the power generation vehicle is determined according to the second load power;

[0031] In response to an instruction of the first switch control of the external circuit in the power generation control box, the voltage and frequency of the power generated by the generator are adjusted through the power generation control box based on the current phase, amplitude and frequency of the external circuit and the second power generation output power;

[0032] When the generator is synchronized with the power grid of the external circuit, the second switch of the power generation vehicle is controlled to be opened, the first switch is closed, and the generator is shut down to disconnect the power generation vehicle from the external circuit under the closure of the third switch of the external circuit.

[0033] Optionally, the first power generation output power is lower than a preset load power.

[0034] A generator car off-grid connection device, applied to the generator car off-grid connection system as described above, comprises:

[0035] a first power generation output power determination unit, configured to obtain a first load power of the external circuit in response to an instruction for the power generation vehicle to be connected to the grid, and determine a first power generation output power of the power generation vehicle according to the first load power;

[0036] A first switch state determination unit is used to determine the state of the first switch in response to an instruction of the first switch control of the external circuit in the power generation control box after the power generation vehicle is started with the first power generation output power and operates smoothly;

[0037] a first voltage-frequency calibration unit, configured to adjust the voltage and frequency of the generator of the generator vehicle through the power generation control box based on the current phase, amplitude and frequency of the external circuit when the first switch is in a closed state;

[0038] A second switch closing unit, used to control the second switch of the power generation vehicle to close when the generator is synchronized with the power grid of the external circuit;

[0039] A first switch disconnecting unit, used to disconnect the first switch when the generator reaches the first power generation output power, so that the power generation vehicle is connected to the external circuit;

[0040] a second power generation output power determination unit, configured to obtain a second load power of the external circuit in response to an instruction for the power generation vehicle to be disconnected from the external circuit, and determine a second power generation output power of the power generation vehicle according to the second load power;

[0041] a second voltage-frequency calibration unit, for responding to an instruction of the first switch control of the external circuit in the power generation control box, and adjusting the voltage and frequency of the power generated by the generator through the power generation control box based on the current phase, amplitude and frequency of the external circuit and the second power generation output power;

[0042] The off-grid unit is used to control the second switch of the power generation vehicle to be opened, the first switch to be closed, and the generator to be shut down when the generator is synchronized with the power grid of the external circuit and the third switch of the external circuit is closed, so as to disconnect the power generation vehicle from the external circuit.

[0043] By means of the above technical scheme, the present application connects the power generation vehicle to the first switch of the external circuit through a busbar clamp, and utilizes the busbar clamp to enable the power generation vehicle to be connected to the external circuit with power, without the need to disconnect the power supply of the external circuit first, which is conducive to seamless grid connection. When connected to the grid, the power generation vehicle provides power to the load in the external circuit, so that the circuit can still work normally when the low-voltage distribution cabinet or transformer and other equipment of the external circuit are maintained and repaired, thereby ensuring the reliability and continuity of power supply and improving the user's power experience. The power generation control box is respectively connected to the power generation vehicle and the first switch, and the power generation control box is used to control the power generation vehicle to be connected to the external circuit or off the grid, and the power supply of the main power supply of the external circuit is controlled by controlling the first switch, thereby realizing the control of the power source of the load, allowing the operator to select the power supply source of the load through the power generation control box, thereby improving the convenience and safety of grid connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0045] Figure 1 A schematic diagram of a topological structure for realizing off-grid connection of a power generation vehicle provided in an embodiment of the present application;

[0046] Figure 2 A schematic diagram of an interface of an onboard control panel of a power generation vehicle provided in an embodiment of the present application;

[0047] Figure 3 A schematic diagram of an interface of a control box control panel of a power generation control box provided in an embodiment of the present application;

[0048] Figure 4 A schematic diagram of a process for realizing off-grid connection of a power generation vehicle provided in an embodiment of the present application;

[0049] Figure 5 A schematic diagram of the structure of a device for realizing off-grid connection of a power generation vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0051] Figure 1 A topological structure for realizing off-grid connection of a power generation vehicle provided in an embodiment of the present application is as follows: Figure 1 As shown, the topology includes an external circuit and a generator vehicle off-grid system.

[0052] The off-grid system of the power generation vehicle may include a power generation vehicle, a power generation control box and a busbar clamp. In the external circuit, the AC power source is connected to the load through the third switch, the transformer and the first switch in sequence. The power generation vehicle is connected to the first switch through the busbar clamp, the power generation control box is connected to the power generation vehicle, and the power generation control box is connected to the first switch through the busbar clamp.

[0053] The first switch may be arranged on an outgoing busbar of the external circuit.

[0054] Specifically, when the power generation vehicle is connected to the external circuit, it provides electric energy to the load. The power generation control box can control the first switch to be turned on or off, and control the power generation vehicle to be connected to the external circuit or off the grid after the first switch is turned off.

[0055] It can be understood that when the first switch is disconnected, the load is powered by the generator truck, and when the first switch is closed (and the third switch is closed), the load is powered by the AC power supply. It can be seen that the power generation control box can determine whether the first switch is powered by the generator truck or the AC power supply by controlling the on and off of the first switch.

[0056] Furthermore, the power generation vehicle may include a generator and a second switch, and the second switch may be configured at the output end of the generator. Based on this, the power generation control box can be used to control the second switch to be connected or disconnected after the first switch is disconnected, so as to control the power generation vehicle to be connected to or off the grid with the external circuit.

[0057] It can be understood that after the first switch is disconnected, the generator of the power generation vehicle supplies power to the load. At this time, if the second switch is turned on, the generator can supply power to the load, and the power generation vehicle and the external circuit are in a grid-connected state. If the second switch is disconnected, the generator cannot supply power to the load, and the power generation vehicle and the external circuit are in an off-grid state.

[0058] Furthermore, the power generation vehicle can be equipped with an on-board control panel. Figure 2 As shown, aviation plugs HCMA1 and HCMB1 may be provided on the vehicle control panel, and the power generation control box may be connected to the aviation plugs via secondary cables.

[0059] At present, the control box configured with the power generation vehicle is used to control the grid connection process. The control box corresponds to the power generation vehicle one by one and cannot be deployed between multiple power generation vehicles. If the control box is used for grid connection, an automatic bypass module needs to be configured at the terminal block, and another cable and another busbar clamp are led out through the automatic bypass module, and connected to the incoming busbar of the external circuit, so that the switching of the main power supply and the power supply of the power generation vehicle can be realized during the grid connection process. Therefore, it can be understood that after the on-board control panel of the power generation vehicle of the present application is connected to the power generation control box through two aviation plugs, the control box configured with the power generation vehicle is short-circuited, so that the power generation control box replaces its work in the grid connection process. It can be seen that the use of the power generation control box saves the cost of the automatic bypass module and another busbar clamp, and effectively reduces the cost of the power generation vehicle grid connection work.

[0060] The vehicle control panel is also provided with a power generation output power control module, so that the user can set the power generation output power of the power generation vehicle through the power generation output power control module. Specifically, the user can input the value of the power generation output power on the power generation output power control module.

[0061] It is understandable that due to the different load conditions of different external circuits, their corresponding load powers are also different. In order to replace the main power supply when the transformer and other equipment are undergoing maintenance and repair, the generator output power needs to be adjusted according to the load power of different external circuits to prevent insufficient output power from affecting the user's power experience, or higher output power, resulting in excess power backflow into the grid. Therefore, a power output power control module is configured on the vehicle control panel so that the operator can easily adjust the power output power.

[0062] There is also a buzzer on the vehicle control panel to alarm when the generator is abnormal.

[0063] It is understandable that in order to promptly notify the operator when an abnormal situation occurs in the generator, the vehicle control panel can be provided with a buzzer to trigger an alarm prompt when the generator is abnormal, so that the operator can handle the abnormal situation in time and improve the safety of grid-connected work.

[0064] In addition, the vehicle control panel is also equipped with an indicator power supply ( Figure 2 "Power" in the Figure 2 "Generation" in the upper right corner), emergency stop control button ( Figure 2 Emergency Stop in the vehicle control panel), start or close the rotary switch on the vehicle control panel ( Figure 2 The "rotary switch" in the Figure 2 on the control panel).

[0065] Furthermore, considering the operational safety of the operator when connecting the generator car to the grid, the generator car off-grid system may also include a switch operating device, which can be connected to the first switch so that the power generation control box is connected to the switch operating device through the secondary cable and the bus bar clamp, and then connected to the first switch.

[0066] It can be understood that the switch operating device can control the closing or opening of the first switch. The operator can indirectly control the state of the first switch by remotely controlling the switch operating device, avoiding the need for the operator to touch the first switch when the external circuit is energized, thereby improving operational safety.

[0067] Specifically, at the grid-connected site, in addition to the two secondary cables connected to the aviation plug of the vehicle control panel, the power generation control box also connects to a third secondary cable. One end of the secondary cable is connected to the vehicle control panel, and the other end can be connected to the terminal block, and then connected to the cable connected to the external circuit and the power generation vehicle through the terminal block. During the process of grid connection or off-grid connection, the operator can remotely control the first switch through the line by operating the control button of the power generation control box.

[0068] Furthermore, in order to monitor the circuit status during the grid connection process, the generator vehicle off-grid connection system may also include a sampling device, such as Figure 1 As shown, the sampling device can be connected to the end of the first switch away from the load through an alligator clip. The sampling device can also be connected to the power generation control box.

[0069] Specifically, the sampling device can be used to collect circuit data of the external circuit and feed it back to the power generation control box.

[0070] In addition, the sampling device can also be connected to the remote data background so that the circuit data of the grid-connected work at each point can be fed back to the remote data background, making it convenient for the background personnel to give instructions on the grid-connected site according to the circuit data.

[0071] Furthermore, the power generation control box can be configured with a control box control panel, such as Figure 3 As shown, the control box control panel may include a fault reset button, a first switch button, a second switch button, a generator start button and a generator stop button.

[0072] Among them, the fault reset button can be used to reset the state of the first switch and / or the power generation vehicle after it is pressed, so as to reset the grid-connected operation and improve the safety of the grid-connected operation.

[0073] The first switch button can be used to change the state of the first switch after it is pressed.

[0074] The second switch button can be used to change the state of the second switch of the power generation vehicle after it is pressed.

[0075] The generator start button can be used to start the generator of the generator truck.

[0076] The generator stop button can be used to shut down the generator.

[0077] based on Figure 1 The topology shown in the figure is Figure 4 A schematic diagram of a flow chart of a method for realizing off-grid connection of a power generation vehicle provided in an embodiment of the present application is shown, referring to Figure 4 , the process may include:

[0078] Step S110: In response to an instruction for the power generation vehicle to be connected to the external circuit, a first load power of the external circuit is acquired, and a first power generation output power of the power generation vehicle is determined according to the first load power.

[0079] Specifically, the first load power of the external circuit can be obtained by the sampling device. In order to prevent excess power from flowing back into the power grid, the first power generation output power can be set to be lower than the preset load power, and the preset load power can be set to 5kW to 10kW.

[0080] Before the generator truck is connected to the grid, first ensure the connection of cables between the generator truck and the generator control box, as well as between the generator control box and the terminal block, and then connect the sampling device to the external circuit through the crocodile clip. After confirming that the connection is completed, connect the busbar clip to one end of the first switch with power while the external circuit is still working, and then confirm whether the phase sequence clamped by the crocodile clip is correct. After the operator has verified and confirmed, the grid connection operation can be started. The operator turns on the rotary switch on the vehicle control panel and turns on the power-on key, and the generator control box can be powered on.

[0081] Step S120: After the power generation vehicle is started with the first power generation output power and operates smoothly, respond to the instruction of the first switch control of the external circuit in the power generation control box to determine the state of the first switch.

[0082] Specifically, after setting the first power generation output power, the operator can start the generator of the power generation vehicle, wait for the speed and voltage of the generator set to stabilize, and then press the first switch button in the control box control panel to obtain the state of the first switch.

[0083] Step S130: When the first switch is in a closed state, the voltage and frequency of the generator of the power generation vehicle are adjusted through the power generation control box based on the current phase, amplitude and frequency of the external circuit.

[0084] Specifically, when it is determined that the first switch is in a closed state before being connected to the grid, the voltage and frequency of the power generated by the generator can be adjusted to be synchronized with the grid of the external circuit.

[0085] Furthermore, the voltage and frequency of the generator can be adjusted when connected to the grid so that the control operation of synchronization with the external circuit grid can be automated and incorporated into the second switch button, so that the operator can press the second switch button when connected to the grid to achieve synchronization of the generator with the external circuit grid.

[0086] Step S140: When the generator is synchronized with the power grid of the external circuit, the second switch of the power generation vehicle is controlled to be closed.

[0087] It can be understood that when the second switch is closed, the generator is connected to the load of the external circuit, and the necessary conditions for supplying power to the load are met. Since the generator is synchronized with the power grid of the external circuit at this time, the power supply to the load is not affected during the grid-connected process, thereby achieving seamless grid connection and improving the user's power experience when maintenance and repair of equipment such as transformers are required.

[0088] Step S150: When the generator reaches the first power generation output power, the first switch is disconnected to connect the generator vehicle to the external circuit.

[0089] It can be understood that when the first switch is disconnected, the AC power supply no longer supplies power to the load, and the load is powered by the generator of the power generation vehicle, completing the grid connection.

[0090] Step S160: In response to the instruction for the power generation vehicle to disconnect from the external circuit, a second load power of the external circuit is acquired, and a second power generation output power of the power generation vehicle is determined according to the second load power.

[0091] Step S170, in response to the instruction of the first switch control of the external circuit in the power generation control box, based on the current phase, amplitude and frequency of the external circuit, and the second power generation output power, the voltage and frequency of the generator power generation are adjusted through the power generation control box.

[0092] It is understandable that when the generator truck is preparing to go off-grid, it is necessary to pre-adjust the voltage and frequency of the generator to be synchronized with the power grid of the external circuit so that the power supply to the load is not affected after going off-grid, achieving seamless off-grid operation and ensuring the user's power experience when maintenance and repair of equipment such as transformers are required.

[0093] Furthermore, the voltage and frequency of the generator can be adjusted when off-grid so that the control operation of synchronization with the external circuit grid can be automated and incorporated into the first switch button, so that the operator can press the first switch button when off-grid to achieve synchronization of the generator with the external circuit grid.

[0094] Step S180: When the generator is synchronized with the power grid of the external circuit, when the third switch of the external circuit is closed, the second switch of the power generation vehicle is controlled to be opened, the first switch is closed, and the generator is shut down to disconnect the power generation vehicle from the external circuit.

[0095] It is understandable that when the generator truck needs to be disconnected from the external circuit, it means that the maintenance and inspection work for equipment such as transformers or low-voltage distribution cabinets has been completed. Before leaving the grid, close the third switch first. Since the maintenance and inspection work takes some time, the load condition of the external circuit may change during this time. Therefore, it is necessary to obtain the second load power, and reset the second power generation output power of the generator according to the second load power, and adjust the voltage and frequency of the generator power generation with the second power generation output power. When the phase, amplitude and frequency of the generator are consistent with the power grid of the external circuit, the synchronization is determined. At this time, the first switch is closed, the generator is automatically unloaded to the preset value, the second switch is opened, the generator is shut down, and the off-grid process is completed. Finally, the operator can remove the connections such as the crocodile clip, busbar clip and secondary cable to complete this work.

[0096] The method for connecting a power car to the grid provided in the present embodiment is that the power car is connected to the first switch of the external circuit through a busbar clamp, and the busbar clamp is used to enable the power car to be connected to the external circuit with power, without disconnecting the power supply of the external circuit first, which is conducive to seamless grid connection. When connected to the grid, the power car provides power to the load in the external circuit, so that the circuit can still work normally when the low-voltage distribution cabinet or transformer and other equipment of the external circuit are maintained and repaired, thereby ensuring the reliability and continuity of power supply and improving the user's power experience. The power generation control box is connected to the power car and the first switch respectively, and the power generation control box is used to control the power generation car to be connected to the external circuit or off the grid, and the power supply of the main power supply of the external circuit is controlled by controlling the first switch, thereby realizing the control of the power source of the load, so that the operator can select the power supply source of the load through the power generation control box, thereby improving the convenience and safety of grid connection.

[0097] The following is a description of a device for realizing off-grid connection of a power generation vehicle provided in an embodiment of the present application. The device for realizing off-grid connection of a power generation vehicle described below and the method for realizing off-grid connection of a power generation vehicle described above can be referred to each other.

[0098] See also Figure 5 , Figure 5 A schematic diagram of the structure of a device for realizing off-grid connection of a power generation vehicle disclosed in an embodiment of the present application.

[0099] like Figure 5 As shown, the device may include:

[0100] A first power generation output power determination unit 11 is used to obtain a first load power of the external circuit in response to an instruction for the power generation vehicle to be connected to the grid, and determine a first power generation output power of the power generation vehicle according to the first load power;

[0101] A first switch state determination unit 12 is used to determine the state of the first switch in response to an instruction of the first switch control of the external circuit in the power generation control box after the power generation vehicle is started with the first power generation output power and operates smoothly;

[0102] A first voltage-frequency calibration unit 13, configured to adjust the voltage and frequency of the generator of the generator vehicle through the power generation control box based on the current phase, amplitude and frequency of the external circuit when the first switch is in a closed state;

[0103] A second switch closing unit 14 is used to control the second switch of the power generation vehicle to close when the generator is synchronized with the power grid of the external circuit;

[0104] A first switch disconnecting unit 15, configured to disconnect the first switch when the generator reaches the first power generation output power, so as to connect the generator vehicle to the external circuit;

[0105] A second power generation output power determination unit 16 is used to obtain a second load power of the external circuit in response to an instruction for the power generation vehicle to be disconnected from the external circuit, and determine a second power generation output power of the power generation vehicle according to the second load power;

[0106] The voltage-frequency second calibration unit 17 is used to respond to the instruction of the first switch control of the external circuit in the power generation control box, and adjust the voltage and frequency of the generator through the power generation control box based on the current phase, amplitude and frequency of the external circuit and the second power generation output power;

[0107] The off-grid unit 18 is used to control the second switch of the power generation vehicle to be opened, the first switch to be closed, and the generator to be shut down when the generator is synchronized with the power grid of the external circuit and the third switch of the external circuit is closed, so as to disconnect the power generation vehicle from the external circuit.

[0108] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also 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 a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0109] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can refer to each other.

[0110] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power generation vehicle off-grid system, characterized in that: It includes a power generation vehicle, a power generation control box and a busbar clamp, wherein the power generation vehicle is connected to a first switch of an external circuit through the busbar clamp, the AC power supply of the external circuit is connected to a load through a third switch, a transformer and the first switch in sequence, the power generation control box is connected to the power generation vehicle, and the power generation control box is connected to the first switch through the busbar clamp; The power generation vehicle is used to provide electric energy to the load when connected to the external circuit; The power generation control box is used to control the first switch to be turned on or off, and to control the power generation vehicle to be connected to or off the grid with the external circuit after the first switch is turned off.

2. The system according to claim 1, characterized in that The power generation vehicle comprises a generator and a second switch, wherein the second switch is arranged at an output end of the generator; The power generation control box is used to control the second switch to be turned on or off after the first switch is turned off, so as to control the power generation vehicle to be connected to or off the grid with the external circuit.

3. The system according to claim 1, characterized in that The power generation vehicle is equipped with a vehicle-mounted control panel, on which an aviation plug is provided, and the power generation control box is connected to the aviation plug via a secondary cable; The vehicle-mounted control panel is also provided with a power generation output power control module, so that the user can set the power generation output power of the power generation vehicle through the power generation output power control module; The vehicle-mounted control panel is also provided with a buzzer for giving an alarm when the generator is abnormal.

4. The system according to claim 1, characterized in that It also includes a switch operating device, which is connected to the first switch, so that the power generation control box is connected to the switch operating device through the secondary cable and the busbar clamp, and then connected to the first switch.

5. The system according to claim 1, characterized in that It also includes a sampling device, which is connected to the end of the first switch away from the load through an alligator clip, and the sampling device is connected to the power generation control box; The sampling device is used to collect circuit data of the external circuit and feed it back to the power generation control box.

6. The system according to claim 1, characterized in that The power generation control box is equipped with a control box control panel, and the control box control panel includes a fault reset button, a first switch button, a second switch button, a generator start button and a generator stop button; The fault reset button is used to reset the state of the first switch and / or the power generation vehicle after being pressed; The first switch button is used to change the state of the first switch after being pressed; The second switch button is used to change the state of the second switch of the power generation vehicle after being pressed; The generator start button is used to start the generator of the generator vehicle; The generator stop button is used to shut down the generator.

7. A method for connecting a power generation vehicle to the grid, characterized in that: Applied to the off-grid and on-grid system for generating vehicles as claimed in any one of claims 1 to 6, the method comprises: In response to an instruction for the power generation vehicle to be connected to the external circuit, a first load power of the external circuit is acquired, and a first power generation output power of the power generation vehicle is determined according to the first load power; After the generator vehicle is started with the first power generation output power and operates smoothly, responding to an instruction of the first switch control of the external circuit in the power generation control box, determining the state of the first switch; When the first switch is in a closed state, the voltage and frequency of the generator of the generator vehicle are adjusted through the power generation control box based on the current phase, amplitude and frequency of the external circuit; When the generator is synchronized with the power grid of the external circuit, controlling the second switch of the generator vehicle to close; When the generator reaches the first power generation output power, the first switch is disconnected to connect the generator vehicle to the external circuit; In response to an instruction for the power generation vehicle to disconnect from the external circuit, a second load power of the external circuit is acquired, and a second power generation output power of the power generation vehicle is determined according to the second load power; In response to an instruction of the first switch control of the external circuit in the power generation control box, the voltage and frequency of the power generated by the generator are adjusted through the power generation control box based on the current phase, amplitude and frequency of the external circuit and the second power generation output power; When the generator is synchronized with the power grid of the external circuit, the second switch of the power generation vehicle is controlled to be opened, the first switch is closed, and the generator is shut down to disconnect the power generation vehicle from the external circuit under the closure of the third switch of the external circuit.

8. The method according to claim 7, characterized in that The first power generation output power is lower than a preset load power.

9. A power generation vehicle off-grid device, characterized in that: Applicable to the off-grid and on-grid system for generating vehicles as claimed in any one of claims 1 to 6, the device comprises: a first power generation output power determination unit, configured to obtain a first load power of the external circuit in response to an instruction for the power generation vehicle to be connected to the grid, and determine a first power generation output power of the power generation vehicle according to the first load power; A first switch state determination unit is used to determine the state of the first switch in response to an instruction of the first switch control of the external circuit in the power generation control box after the power generation vehicle is started with the first power generation output power and operates smoothly; a first voltage-frequency calibration unit, configured to adjust the voltage and frequency of the generator of the generator vehicle through the power generation control box based on the current phase, amplitude and frequency of the external circuit when the first switch is in a closed state; A second switch closing unit, used to control the second switch of the power generation vehicle to close when the generator is synchronized with the power grid of the external circuit; A first switch disconnecting unit, used to disconnect the first switch when the generator reaches the first power generation output power, so that the power generation vehicle is connected to the external circuit; a second power generation output power determination unit, configured to obtain a second load power of the external circuit in response to an instruction for the power generation vehicle to be disconnected from the external circuit, and determine a second power generation output power of the power generation vehicle according to the second load power; a second voltage-frequency calibration unit, for responding to an instruction of the first switch control of the external circuit in the power generation control box, and adjusting the voltage and frequency of the power generated by the generator through the power generation control box based on the current phase, amplitude and frequency of the external circuit and the second power generation output power; The off-grid unit is used to control the second switch of the power generation vehicle to be opened, the first switch to be closed, and the generator to be shut down when the generator is synchronized with the power grid of the external circuit and the third switch of the external circuit is closed, so as to disconnect the power generation vehicle from the external circuit.

10. The off-grid and on-grid device for generating vehicles according to claim 9, characterized in that: The first power generation output power is lower than a preset load power.

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