Multi-power-supply automatic switching device and switching method for field fast food processing vehicle

Abstract

The invention belongs to the technical field of power supply distribution, and relates to a multi-power-supply automatic switching device and switching method for a field fast food processing vehicle. The multi-power-supply automatic switching device is used for switching among multiple power supply circuits. Each power supply circuit comprises a power supply, an intelligent circuit breaker and a fuse, the intelligent circuit breaker in each power supply circuit is connected with a controller, the controller is connected with a UPS (Uninterrupted Power Supply), and the UPS and the fuse in each power supply circuit are connected with a power supply output bus. The multi-power-supply automatic switching device is high in informatization degree, monitoring and recording of voltage, current, leakage current and phase loss of a power supply can be achieved through the intelligent circuit breaker and the controller, and data support is provided for fault diagnosis; the controller can judge the actual quality of the current power supply according to the related data information obtained by the intelligent circuit breaker, set the condition allowing power switching, and ensure the quality of the switched power supply.

Description

Technical Field

[0001] The invention belongs to the technical field of power distribution, and relates to a multi-power automatic switching device and a switching method for a field fast food processing vehicle. Background Art

[0002] In order to meet the power demand under different working conditions such as driving and parking, outdoor fast food processing vehicles generally have multiple power sources, including city power, diesel generator sets, parking power generation, etc., and the power distribution device has a multi-power switching function. However, the multi-power switching function of existing power distribution devices is mainly manual switching, the control is not flexible, the switching is not timely, and remote control cannot be achieved. Although some have automatic power switching functions, the system structure is complex, the cost is high, the degree of informatization is low, and it is impossible to monitor information such as voltage, current, leakage current, phase loss, frequency, etc.

[0003] In view of this, the present invention is proposed. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a multi-power automatic switching device and switching method for a field fast food processing vehicle, thereby improving the flexibility and reliability of the power supply of the field fast food processing vehicle.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] On the one hand, the present invention provides a multi-power automatic switching device for an outdoor fast food processing vehicle, which is used for switching between multiple power supply circuits; each of the power supply circuits includes a power supply, an intelligent circuit breaker and a fuse, and the intelligent circuit breaker in each of the power supply circuits is connected to a controller, and the controller is connected to a UPS power supply, and the UPS power supply and the fuse in each of the power supply circuits are connected to the power output bus.

[0007] Specifically, the controller is a single chip microcomputer or a PLC.

[0008] Specifically, the intelligent circuit breaker is connected to the controller via power supply and communication lines.

[0009] Specifically, the upper port of the intelligent circuit breaker is connected to the corresponding power supply, the lower port is connected to the upper port of the fuse, and the lower port of the fuse is connected to the power output bus.

[0010] Specifically, the input end of the UPS power supply is connected to the power output bus, and the output end is connected to the controller.

[0011] Specifically, the controller also establishes data connection with the terminal device through its internal communication module to facilitate remote control.

[0012] Specifically, the controller can realize the grid-connected capacity expansion and off-grid black start power supply functions of the power supply, solve the capacity expansion problem when the transformer is overloaded, and also enable the multiple power sources of the outdoor fast food processing vehicle to be used as part of the external microgrid for external power supply.

[0013] Specifically, the controller can collect and process real-time data such as various four-remote signals, switch quantities, PCS, EMS, etc. commonly used in power systems.

[0014] Specifically, the controller can provide an interface for users to view and process alarm events, and output alarm information when the data exceeds the upper or lower limit; among them, the customization of alarm information in the power supply system is mainly based on the single event or comprehensive analysis results of the substation monitoring system, as well as the monitoring business needs.

[0015] Specifically, the controller can provide analysis curves of voltage, current, power, power factor, etc.

[0016] Specifically, the controller supports two working modes when using the scheduling of multiple power sources: peak load mode and remote mode.

[0017] Specifically, different roles of the controller have different management permissions, that is, maintenance personnel and administrators have different management permissions after logging into the system.

[0018] Furthermore, the controller has multiple input / output interfaces and adopts a modular design, which allows for convenient, fast, and non-stop replacement of AC input units, control modules, DC intelligent distribution modules, etc., and in the process of replacing any module, it does not affect the normal power supply of the system; high-voltage DC boost modules, modular DC switch distribution units, various DC functional modules, and DC intelligent distribution modules can be inserted and used in any slot; the plug-in frame is connected and combined through different modules. Among them,

[0019] ① The DC intelligent power distribution module can be configured as needed to collect real-time data information such as operating voltage, current, electric energy, on / off, and control the power on and off of each output;

[0020] ②AC input unit, dual-channel 63A / 4P input, mechanically interlocked, pluggable and replaceable online, with Class B lightning protection, voltage, current and electricity metering capabilities;

[0021] ③ DC remote power distribution unit, using 10-way 16A / 2P modular DC switch, with voltage, current, insulation monitoring and lightning protection functions;

[0022] ④ Management and control module, which intelligently dispatches the power output of various modules; intelligently dispatches the input power according to the real-time power supply capacity requirements of the load; transmits data through FE, RS485 or NB-IOT or 4G network or 5G network, and accesses the management platform;

[0023] ⑤ Modular DC switch distribution unit, which is a 10-way 125A DC modular circuit breaker, can collect its operating parameters (voltage, current, on-off, etc.).

[0024] Specifically, the controller includes a data interface, which can upload data including real-time data, alarm data, and statistical data of sensor equipment such as PCS, BMS, and electric meters, and upload them to the cloud data center according to the protocol.

[0025] The controller includes real-time monitoring and data collection, data statistics and analysis, energy consumption warning and dynamic management and control, intelligent micro-break strategy control, visual display, compatibility and scalability, energy saving and emission reduction support, open source and customization. It is a multi-faceted and comprehensive energy management solution that can not only improve energy efficiency but also reduce costs.

[0026] On the other hand, the present invention also provides a switching method based on the multi-power automatic switching device of the outdoor fast food processing vehicle as described in the above part, which monitors and records the power supply voltage, current, leakage current, and phase loss through an intelligent circuit breaker and a controller. The controller then judges the actual quality of the power supply based on the received data information, and selects a suitable power supply for power supply based on the set power supply priority order.

[0027] Among them, the power supply usually uses a power supply type with high power factor, high efficiency, low loss, safety, reliability and easy maintenance. A power supply with a high power factor can reduce the harmonic pollution of the power grid current, improve the power quality of the power grid, and reduce the loss of the power supply system; a high-efficiency power supply can reduce energy waste, reduce the temperature rise of the power supply, and extend the service life of the power supply; a low-loss power supply can reduce the load of the power grid and reduce the cost of the power supply system.

[0028] Furthermore, the power supply is preferably connected to the mobile microgrid system. After the multi-power automatic switching device is connected to the mobile microgrid system, it has the ability to access the full amount of energy and the ability to output multiple AC and DC. The power supply unit can directly supply power according to the needs of the load end, or provide off-grid power supply in the form of a microgrid, and can also be used for grid-connected terminal boosting. The entire system has a complete monitoring and management platform, which can control the energy operation status within the site, and can provide a quantum encryption solution to indicate the control security level. By judging whether the energy input can meet the load demand, the energy storage unit is started when the input is less than the load, and then the diesel and gasoline generator, metal fuel cell machine, hydrogen fuel generator and other equipment are started according to the user's customization.

[0029] Specifically, the multi-power automatic switching device is in a power outage state, the intelligent circuit breaker and the controller are powered by a UPS power supply and are in a standby state; when one power supply is connected, the specific switching method is as follows:

[0030] Step 1: Obtain relevant data information of the current power supply circuit through the intelligent circuit breaker;

[0031] Step 2: The controller communicates with the intelligent circuit breaker to determine whether the voltage signal is qualified according to the acquired voltage signal, and determines whether there is a phase loss signal in the current power supply;

[0032] Step 3: If the voltage signal is within the set threshold range and there is no phase loss problem, the controller sends a connection instruction to the intelligent circuit breaker, and the corresponding contacts of the intelligent circuit breaker are connected to transmit the current power supply to the power output bus;

[0033] Step 4: If the voltage signal exceeds the set threshold range, or if there is a phase loss signal in the current power supply, the controller sends a disconnection instruction to the intelligent circuit breaker, and the corresponding contacts of the intelligent circuit breaker are disconnected, thereby terminating the power supply.

[0034] Specifically, when the multi-power automatic switching device has multiple power supplies at the same time, the specific switching method is as follows:

[0035] The controller monitors the input status of the power supply through the intelligent circuit breakers in each power supply circuit, sorts the priorities of all power supply circuits, and selects the power supply with the highest priority that meets the power quality requirements for access;

[0036] When the connected power supply circuit is interrupted or its power quality does not meet the requirements, the controller re-orders the priorities of the remaining power supplies that meet the power quality requirements, disconnects the currently connected power supply circuit, and switches to the power supply with the highest priority for power supply.

[0037] Furthermore, the switching method further includes:

[0038] When the connected power supply is normal and a new power supply appears, if the quality of the new power supply meets the requirements and its priority is higher than that of the current power supply, an alarm signal is generated and the system automatically switches to the power supply with a higher priority after a delay of several seconds.

[0039] Specifically, a UPS power supply is used for short-term power supply during the power switching process.

[0040] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0041] The multi-power automatic switching device provided by the present invention has a high degree of informatization. Through the intelligent circuit breaker and the controller, it can monitor and record the power supply voltage, current, leakage current, and phase loss, providing data support for fault diagnosis; the controller can judge the actual quality of the current power supply according to the relevant data information obtained by the intelligent circuit breaker, set the conditions for allowing power supply switching, and ensure the quality of the switched power supply; and set a customized switching strategy to flexibly set the switching priority of each power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings are incorporated in and constitute a part of this specification and, together with the description, serve to explain the principles of the present invention.

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0044] Figure 1 A functional block diagram of a multi-power automatic switching device for a field fast food processing vehicle provided by the present invention;

[0045] Figure 2 A structural diagram of the controller provided by the present invention;

[0046] Figure 3 A switching flow chart of the switching device when one power supply provided by the present invention is connected. DETAILED DESCRIPTION

[0047] Here, exemplary embodiments will be described in detail, and the embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are only examples consistent with some aspects of the present invention described in detail in the appended claims.

[0048] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0049] Example

[0050] See also Figure 1As shown, this embodiment provides a multi-power automatic switching device for an outdoor fast food processing vehicle, which is composed of a plurality of power supply lines. Each power supply circuit includes an intelligent circuit breaker, the upper port of the intelligent circuit breaker is connected to the corresponding power supply, the lower port is connected to the upper port of the fuse, and the lower port of the fuse is connected to the power output bus; the input end of the UPS power supply is connected to the power output bus, and the output end is connected to the controller to supply power to the controller; the controller is connected to each intelligent circuit breaker through a power supply and communication line, supplies power to each intelligent circuit breaker and realizes communication control; the controller also connects data with the terminal equipment through a communication module arranged therein, so as to realize remote control.

[0051] Among them, the distribution location and specific functions of each module are as follows:

[0052] Intelligent circuit breaker: distributed on the power supply access circuit, used to communicate with the controller, receive controller instructions to complete the switching of the power supply line; used for overcurrent, short circuit, leakage, and phase loss protection of the line; used for collecting parameters such as current, voltage, leakage current, and frequency of the line and uploading them to the controller;

[0053] Fuse: distributed on the power supply access circuit and used as backup short-circuit protection for the power supply circuit;

[0054] UPS power supply: uninterruptible power supply, used to power controllers, intelligent circuit breakers and other components;

[0055] Controller: used to receive relevant data information fed back by the intelligent circuit breaker, the relevant data confidence includes the voltage, current, leakage current, frequency and other parameters of the current power supply circuit; and analyze and judge the current input power according to the relevant data information, and realize the switching control of the input power in combination with the set switching strategy; the controller can be a PLC or a single-chip microcomputer;

[0056] Power output bus: used to connect the lines of power-consuming equipment to realize external power supply.

[0057] Specifically, the controller can realize the grid-connected capacity expansion and off-grid black start power supply functions of the power supply, solve the capacity expansion problem when the transformer is overloaded, and also enable the multiple power sources of the outdoor fast food processing vehicle to be used as part of the external microgrid for external power supply.

[0058] Specifically, the controller can collect and process real-time data such as various four-remote signals, switch quantities, PCS, EMS, etc. commonly used in power systems.

[0059] Specifically, the controller can provide an interface for users to view and process alarm events, and output alarm information when the data exceeds the upper or lower limit; among them, the customization of alarm information in the power supply system is mainly based on the single event or comprehensive analysis results of the substation monitoring system, as well as the monitoring business needs.

[0060] Specifically, the controller can provide analysis curves of voltage, current, power, power factor, etc.

[0061] Specifically, the controller supports two working modes when using the scheduling of multiple power sources: peak load mode and remote mode.

[0062] Specifically, different roles of the controller have different management permissions, that is, maintenance personnel and administrators have different management permissions after logging into the system.

[0063] Further, see Figure 2 As shown, the controller has multiple input / output interfaces and adopts a modular design. It can easily, quickly and without power outages replace the AC input unit, management and control module, DC intelligent distribution module, etc., and the normal power supply of the system will not be affected during the replacement of any module; the high-voltage DC boost module, modular DC switch distribution unit, various DC functional modules and DC intelligent distribution modules can be inserted and used in any slot; the frame is connected and combined through different modules.

[0064] Among them, the DC intelligent distribution module is distributed on the upper left side of the controller, the AC input unit is located below the DC intelligent distribution module, the modular DC switch distribution unit is adjacent to the DC intelligent distribution module, the control module is distributed below the modular DC switch distribution unit, and the DC power access control module is distributed immediately below and to the right of the control module. The high-voltage DC boost module and the new energy access control module are located below the controller from left to right, and the same DC remote power supply distribution unit is set below the high-voltage DC boost module and the new energy access control module. Specifically, the design and function of each functional module are as follows:

[0065] ① The DC intelligent power distribution module can be configured as needed to collect real-time data information such as operating voltage, current, electric energy, on / off, and control the power on and off of each output;

[0066] ②AC input unit, dual-channel 63A / 4P input, mechanically interlocked, pluggable and replaceable online, with Class B lightning protection, voltage, current and electricity metering capabilities;

[0067] ③ DC remote power distribution unit, using 10-way 16A / 2P modular DC switch, with voltage, current, insulation monitoring and lightning protection functions;

[0068] ④ Management and control module, which intelligently dispatches the power output of various modules; intelligently dispatches the input power according to the real-time power supply capacity requirements of the load; transmits data through FE, RS485 or NB-IOT or 4G network or 5G network, and accesses the management platform;

[0069] ⑤ Modular DC switch distribution unit, which is a 10-way 125A DC modular circuit breaker, can collect its operating parameters (voltage, current, on-off, etc.).

[0070] Specifically, the controller includes a data interface, which can upload data including real-time data, alarm data, and statistical data of sensor equipment such as PCS, BMS, and electric meters, and upload them to the cloud data center according to the protocol.

[0071] The controller includes real-time monitoring and data collection, data statistics and analysis, energy consumption warning and dynamic management and control, intelligent micro-break strategy control, visual display, compatibility and scalability, energy saving and emission reduction support, open source and customization. It is a multi-faceted and comprehensive energy management solution that can not only improve energy efficiency but also reduce costs.

[0072] The above-mentioned multi-power automatic switching device for outdoor fast food processing vehicles monitors and records the power supply voltage, current, leakage current, and phase loss through intelligent circuit breakers and controllers. The controller then determines the actual quality of the power supply based on the received data information, and selects the appropriate power supply for power supply based on the set power supply priority order.

[0073] Furthermore, the power supply is preferably connected to the mobile microgrid system. After the multi-power automatic switching device is connected to the mobile microgrid system, it has the ability to access the full amount of energy and the ability to output multiple AC and DC. The power supply unit can directly supply power according to the needs of the load end, or provide off-grid power supply in the form of a microgrid, and can also be used for grid-connected terminal boosting. The entire system has a complete monitoring and management platform, which can control the energy operation status within the site, and can provide a quantum encryption solution to indicate the control security level. By judging whether the energy input can meet the load demand, the energy storage unit is started when the input is less than the load, and then the diesel and gasoline generator, metal fuel cell machine, hydrogen fuel generator and other equipment are started according to the user's customization.

[0074] Specifically, the working principle of the above-mentioned outdoor fast food processing vehicle multi-power automatic switching device is as follows:

[0075] 1. When only one power supply is connected

[0076] When the multi-power automatic switching device is in a power outage state, the intelligent circuit breaker and controller are powered by the UPS power supply and are in standby state; when only one power supply is connected, refer to Figure 3 The specific switching method is as follows:

[0077] Step 1: Obtain relevant data information of the current power supply circuit through the intelligent circuit breaker;

[0078] Step 2: The controller communicates with the intelligent circuit breaker to determine whether the voltage signal is qualified according to the acquired voltage signal, and determines whether there is a phase loss signal in the current power supply;

[0079] Step 3: If the voltage signal is within the set threshold range and there is no phase loss problem, the controller sends a connection instruction to the intelligent circuit breaker, and the corresponding contacts of the intelligent circuit breaker are connected to transmit the current power supply to the power output bus;

[0080] Step 4: If the voltage signal exceeds the set threshold range, or if there is a phase loss signal in the current power supply, the controller sends a disconnection instruction to the intelligent circuit breaker, and the corresponding contacts of the intelligent circuit breaker are disconnected, thereby terminating the power supply.

[0081] 2. When multiple power sources are connected

[0082] The controller monitors the input status of the power supply through the intelligent circuit breakers in each power supply circuit, sorts the priorities of all power supply circuits, and selects the power supply with the highest priority that meets the power quality requirements for access;

[0083] When the connected power supply circuit is interrupted or its power quality does not meet the requirements, the controller re-orders the priorities of the remaining power supplies that meet the power quality requirements, disconnects the currently connected power supply circuit, and switches to the power supply with the highest priority for power supply.

[0084] Furthermore, when the connected power supply is normal and a new power supply appears, if the quality of the new power supply meets the requirements and its priority is higher than that of the current power supply, an alarm signal is generated and the power supply with a higher priority is automatically switched after a delay of several seconds.

[0085] In summary, the automatic multi-power switching device for outdoor fast food processing vehicles provided by the present invention has a simple structure, low cost, automatic switching, and a high degree of informatization. It solves the shortcomings of the current multi-power switching device that is mainly manual switching, inflexible control, untimely switching, and cannot be remotely controlled, and improves the flexibility and reliability of power supply for outdoor fast food processing vehicles.

[0086] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0087] It should be understood that the present invention is not limited to what has been described above and that various modifications and changes may be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A multi-power automatic switching device for outdoor fast food processing vehicles, used for switching between multiple power supply circuits; characterized in that: Each of the power supply circuits includes a power supply, an intelligent circuit breaker and a fuse. The intelligent circuit breaker in each of the power supply circuits is connected to the controller. The controller is connected to a UPS power supply. The UPS power supply and the fuse in each of the power supply circuits are connected to the power output bus. The controller has multiple input / output interfaces, and the controller also includes a high-voltage DC boost module and a new energy access control module.

2. The multi-power automatic switching device for outdoor fast food processing vehicles according to claim 1 is characterized in that: The controller is a single chip microcomputer or a PLC.

3. The multi-power automatic switching device for outdoor fast food processing vehicles according to claim 1 is characterized in that: The intelligent circuit breaker is connected to the controller via power supply and communication lines.

4. The multi-power automatic switching device for outdoor fast food processing vehicles according to claim 3 is characterized in that: The upper port of the intelligent circuit breaker is connected to the corresponding power supply, the lower port is connected to the upper port of the fuse, and the lower port of the fuse is connected to the power output bus.

5. The multi-power automatic switching device for outdoor fast food processing vehicles according to claim 1 is characterized in that: The input end of the UPS power supply is connected to the power output bus, and the output end is connected to the controller.

6. A switching method based on the multi-power automatic switching device of a field fast food processing vehicle according to any one of claims 1 to 5, characterized in that: The power supply voltage, current, leakage current and phase loss are monitored and recorded through intelligent circuit breakers and controllers. The controller then determines the actual quality of the power supply based on the received data information and selects the appropriate power supply for power supply based on the set power supply priority order.

7. The switching method of the multi-power automatic switching device of the outdoor fast food processing vehicle according to claim 6 is characterized in that: The multi-power automatic switching device is in a power outage state, and the intelligent circuit breaker and controller are powered by a UPS power supply and are in a standby state; when one power supply is connected, the specific switching method is as follows: Step 1: Obtain relevant data information of the current power supply circuit through the intelligent circuit breaker; Step 2: The controller communicates with the intelligent circuit breaker to determine whether the voltage signal is qualified according to the acquired voltage signal, and determines whether there is a phase loss signal in the current power supply; Step 3: If the voltage signal is within the set threshold range and there is no phase loss problem, the controller sends a connection instruction to the intelligent circuit breaker, and the corresponding contacts of the intelligent circuit breaker are connected to transmit the current power supply to the power output bus; Step 4: If the voltage signal exceeds the set threshold range, or if there is a phase loss signal in the current power supply, the controller sends a disconnection instruction to the intelligent circuit breaker, and the corresponding contacts of the intelligent circuit breaker are disconnected, thereby terminating the power supply.

8. The switching method of the multi-power automatic switching device of the outdoor fast food processing vehicle according to claim 6 is characterized in that: When there are multiple power supplies in the multi-power automatic switching device, the specific switching method is as follows: The controller monitors the input status of the power supply through the intelligent circuit breakers in each power supply circuit, sorts the priorities of all power supply circuits, and selects the power supply with the highest priority that meets the power quality requirements for access; When the connected power supply circuit is interrupted or its power quality does not meet the requirements, the controller re-orders the priorities of the remaining power supplies that meet the power quality requirements, disconnects the currently connected power supply circuit, and switches to the power supply with the highest priority for power supply.

9. The switching method of the multi-power automatic switching device of the outdoor fast food processing vehicle according to claim 8 is characterized in that: Also includes: When the connected power supply is normal and a new power supply appears, if the quality of the new power supply meets the requirements and its priority is higher than that of the current power supply, an alarm signal is generated and the system automatically switches to the power supply with a higher priority after a delay of several seconds.

10. The switching method of the multi-power automatic switching device of the outdoor fast food processing vehicle according to claim 9, characterized in that: UPS power supply is used for short-term power supply during power switching.

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