Mobile security emergency power supply system

Abstract

The utility model discloses a mobile security emergency power supply system, which comprises a control unit, a photovoltaic energy storage unit, a generator set unit, an intelligent switching unit, a main power distribution unit and a load unit, all the units are integrated into a container type all-in-one machine which is installed on a vehicle and used in a vehicle-mounted maneuvering mode. The mobile multifunctional emergency system has the advantages that the hybrid power station is constructed by using the light storage unit and the generator set, and is integrated with the load output equipment with various functions to form the mobile multifunctional emergency system comprehensively, so that stable and reliable emergency power and site illumination are provided for various camps quickly, and the emergency power supply efficiency is improved. The capability of the user to deal with various risks of the power supply system is effectively improved; the system has multiple power supply and consumption modes of light storage power source main use, generator set main use and fault conditions, and flexibly adapts to different load conditions and power supply equipment conditions; the device is suitable for various field conditions and application scenes such as long-term fixed use, maneuverable use and external photovoltaic power generation.

Description

Technical Field

[0001] The utility model relates to a power supply system, in particular to a mobile security emergency power supply system, belonging to the technical field of security emergency power supply systems. Background Art

[0002] Project camps are often far from energy sources and power grids, resulting in significant losses for users when power supply system failures occur. Users in some areas report facing complex risks, such as the possibility that a terrorist attack could paralyze the entire camp if the power distribution system were damaged. A mobile security emergency power system is a suitable emergency power supply method, providing a flexible and rapid emergency solution for power-intensive scenarios such as military field deployments and operations, forest and border defense, agricultural water conservancy, security monitoring, field exploration and surveys, and engineering project construction. Furthermore, camps located in remote mountainous areas, on oceanic islands, and other locations often have poor infrastructure, resulting in power difficulties or high transmission grid construction costs. Therefore, it is more appropriate to utilize clean energy resources locally to enhance the camp's self-sufficiency. A clean and reliable power supply not only effectively reduces carbon emissions but also fundamentally addresses energy supply issues in specific scenarios. Summary of the Invention

[0003] In order to solve the above problems, the utility model proposes a mobile security emergency power supply system with one-stop rapid emergency response capability, integrating photovoltaic clean energy, energy storage system, generator system and multiple functional devices into one, and realizing mobility and flexibility in a vehicle-mounted form, which can ensure the user's emergency scenario functional needs and stable, reliable and uninterrupted power supply to important loads.

[0004] The technical solution of this utility model patent is:

[0005] The mobile security emergency power supply system includes a container-type all-in-one unit, which is equipped with a control unit, photovoltaic energy storage unit, generator unit, intelligent switching unit, main power distribution unit, and load unit. All of the above units are integrated into a container-type all-in-one unit and installed in a vehicle for easy mobile use.

[0006] The photovoltaic energy storage unit includes photovoltaic panels, a junction box, a photovoltaic controller, an energy storage battery, and a battery management system; the intelligent switching unit includes a bidirectional converter, a first contactor, a second contactor, a third contactor, and a critical load switch; the main distribution unit includes a critical load bus, an emergency load bus, and a backup bus; the load unit includes lifting lighting, an uninterrupted power socket group, system self-use power, an emergency socket group, and a backup circuit.

[0007] The control unit is communicatively connected to the photovoltaic energy storage unit, the generator unit, and the intelligent switching unit, and is used to detect operating data of the photovoltaic energy storage unit, the generator unit, and the intelligent switching unit, and control the operating modes of the photovoltaic energy storage unit and the generator unit according to the application scenario, and monitor the operating status of the intelligent switching unit;

[0008] The photovoltaic energy storage unit is electrically connected to the intelligent switching unit and outputs stored energy discharge power to the critical load bus of the main power distribution unit, or receives output power from the generator unit for charging the energy storage battery;

[0009] The photovoltaic panels, combiner box, and photovoltaic controller of the photovoltaic energy storage unit are connected to the energy storage battery in sequence; the photovoltaic panels are installed on the top of the container-type integrated machine in a retractable structure; the combiner box has reserved loop capacity for connecting to an external site to expand the photovoltaic panels; the energy storage battery is used to store the generated electricity of the photovoltaic panels and the generator unit, and supply power to the load during discharge; the battery management system is used for operating data management, monitoring, and control of the energy storage battery, and is in communication with the control unit; the photovoltaic controller is used to control the power generation output of the photovoltaic panels and charge the energy storage battery; the combiner box is used to collect photovoltaic power and supply power to the photovoltaic controller;

[0010] The generator set unit is electrically connected to the intelligent switching unit to supply power to the critical load bus of the main power distribution unit and to charge the energy storage battery of the photovoltaic energy storage unit;

[0011] The generator set unit is electrically connected to the main power distribution unit to provide power to the emergency load bus;

[0012] The bidirectional converter of the intelligent switching unit is used for bidirectional conversion of AC and DC power, realizing the charging of the energy storage battery by AC power and the discharge of the energy storage battery to supply power to the load; the DC side of the bidirectional converter is connected to the output of the photovoltaic energy storage unit through the first contactor; the AC side of the bidirectional converter supplies power to the critical load bus through the second contactor and the critical load switch; the output power of the generator set unit is supplied to the critical load bus through the third contactor and the critical load switch.

[0013] Seamless switching and state combination between the second contactor and the third contactor ensure seamless switching between the photovoltaic energy storage unit and the generator unit and conversion of the charge and discharge state of the bidirectional converter. This is achieved by: the bidirectional converter monitors the incoming line voltage signal from the generator unit and tracks the voltage amplitude, frequency, and phase in real time to ensure that either the second contactor or the third contactor meets synchronization conditions when closed and that power supply to the load side is smooth and uninterrupted when opened;

[0014] The key load busbar of the main power distribution unit supplies power to the lifting lighting, uninterrupted power socket group, and self-powered load of the system of the load unit through the power distribution switch; the emergency load busbar of the main power distribution unit supplies power to the emergency socket group and the load of the backup circuit through the power distribution switch; the backup busbar of the main power distribution unit is used to connect the key load busbar and the emergency load busbar, and is normally open and locked for protection in normal operation mode. It can be temporarily closed for temporary power supply during fault maintenance or special operation mode;

[0015] The load unit is divided into the load of the critical load bus and the load of the emergency load bus. Among them, (1) the load of the critical load bus includes the lifting lighting, the non-stop power socket group and the system's own power; the lifting lighting is used for emergency lighting of the camp site, and at the same time provides power for the lifting device pneumatic pump and lighting control box, and provides conversion working power for the camera integrated with the same pole; the non-stop power socket group is used to provide plug-in power for important load lines on the camp site; the system's own power is used to ensure the continuous maintenance of the load required for the startup and normal operation of the mobile security emergency power supply system, including the auxiliary power of the generator unit, the auxiliary power of the container-type integrated machine, and the conversion working power of the control unit; (2) the load of the emergency load bus includes the emergency socket group and the backup circuit; the emergency socket group is used to provide plug-in power for other load lines on the camp site; the backup circuit is used for temporary wiring load backup.

[0016] The mobile security emergency power supply system switches between multiple operating modes according to different power usage scenarios and site conditions. The switching of operating modes is controlled by the intelligent switching unit through signal instructions sent by the control unit. The operating modes include: photovoltaic energy storage main mode, generator set main mode, first half station failure mode, and second half station failure mode.

[0017] Among them, (1) the photovoltaic energy storage main mode: the generator set unit serves as a backup power source, and the third contactor is disconnected; the photovoltaic energy storage unit serves as a main power source, and the first contactor, the second contactor and the key load switch are closed, and the photovoltaic energy storage unit carries all the loads of the key load bus; when the charge state of the energy storage battery reaches the set lower limit and the photovoltaic power is insufficient, the generator set unit starts to run, the third contactor is closed at the same time, and the bidirectional converter is converted to a battery charging mode, and the generator set unit supplies power to the key load bus and charges the energy storage battery at the same time. During this period, the emergency load bus can also supply power to the load; when the charge state of the energy storage battery reaches the set upper limit, the generator set unit stops and returns to the standby state, the third contactor is disconnected, the bidirectional converter is converted to a battery discharge mode, and the photovoltaic energy storage unit supplies power to the key load bus; the process of the generator set unit starting to charge the energy storage battery and exiting the operation after charging is completed is seamless switching, ensuring uninterrupted power supply to the key load bus;

[0018] When the campsite has high requirements for energy conservation and emission reduction, and there is sufficient solar energy and a large-capacity fixed photovoltaic panel array is already available, and if the photovoltaic controller matching parameters and the access conditions of the combiner box are met, it is more advantageous to adopt the photovoltaic energy storage primary mode, with the generator set serving as the charging power source and backup power source. Compared with using only the limited capacity of vehicle-mounted photovoltaic panels, this can greatly reduce the number of generator set start-up and charging times and the operating time.

[0019] (2) The generator set main mode: the photovoltaic energy storage unit serves as a backup power source, the first contactor and the second contactor are disconnected; the generator set unit serves as a main power source, the third contactor and the critical load switch are closed, and the generator set unit carries all the loads of the emergency load bus and the critical load bus; when the generator set unit fails or is unavailable, the third contactor is disconnected, the first contactor and the second contactor are closed, and the photovoltaic energy storage unit continuously supplies power to the critical load bus, at which time the emergency load bus is out of power; when the generator set unit resumes normal operation, the third contactor is closed at the same time, and the second contactor and the first contactor are disconnected, achieving seamless switching, and the system resumes normal operation; during the operation of the generator set in the main mode, when the state of charge of the energy storage battery is lower than the set lower limit and the photovoltaic power is insufficient, the first contactor and the second contactor are closed at the same time, and the generator set unit charges the energy storage battery. Charging stops when the state of charge reaches the set upper limit, and the photovoltaic energy storage unit returns to the standby state;

[0020] When the conditions for photovoltaic utilization on site are poor and energy conservation and environmental protection are not a priority, such as in emergencies or temporary short-term emergencies, and the focus is on emergency power supply and backup power supply without interruption on an emergency basis, the generator set main mode is a better choice;

[0021] When the generator set unit adopts a diesel generator set, the photovoltaic energy storage main mode and the generator set main mode both belong to the photovoltaic energy storage and diesel hybrid power supply emergency power station;

[0022] (3) The first half-station failure mode: When the photovoltaic energy storage unit or the intelligent switching unit is unavailable, it is necessary to disconnect and exit operation, and the generator set unit carries all the loads of the critical load bus and the emergency load bus; at this time, the distribution switch of the main distribution unit is disconnected, and the standby bus is unlocked and placed in a closed state; when the photovoltaic energy storage unit and the intelligent switching unit are all available, the standby bus is disconnected and locked, the distribution switch is restored to a closed state, and then the system is restored to the photovoltaic energy storage main mode or the generator set main mode as needed;

[0023] The first half-station failure mode is a common generator emergency power station with no other power supply. This mode is used when the photovoltaic energy storage system or bidirectional converter is undergoing maintenance.

[0024] (4) The second half-station failure mode: When the generator set unit is unavailable, it is necessary to disconnect and exit operation, disconnect the distribution switch of the main distribution unit, and the photovoltaic energy storage unit supplies power to the critical load bus through the intelligent switching unit. The backup bus can also be unlocked and placed in a closed state as needed, so that the photovoltaic energy storage unit can reversely carry the emergency load bus; in the case of the second half-station failure mode, the load carried is not greater than the capacity of the photovoltaic energy storage unit; when the generator set unit is restored to be available, it is necessary to confirm that the backup bus is in a disconnected and locked state, and restore the distribution switch to a closed state, and then restore the system to the photovoltaic energy storage main mode or the generator set main mode as needed;

[0025] The second half-station failure mode is equivalent to a general photovoltaic energy storage power station; this mode is used during the maintenance of the generator system failure; if the photovoltaic utilization conditions are insufficient, the power supply load capacity and operating time under this mode are very limited.

[0026] According to different power usage scenarios and site conditions, the mobile security emergency power supply system adopts a selection between different functions, including scenario functions and comprehensive load functions.

[0027] (1) The scenario function: The container-type integrated machine is connected and fixed to the vehicle chassis in a detachable manner, using a corner lock connection method; the container-type integrated machine can be separated from the vehicle and fixed separately at the camp site for long-term use; it can also be mobile and used in a vehicle-mounted manner for short-term use; when a large-capacity photovoltaic power generation equipment is fixedly installed at the camp site, the junction box can be connected to overcome the insufficient capacity of the photovoltaic panels on the vehicle and improve the clean power supply capacity of the mobile security emergency power supply system;

[0028] (2) The integrated load function: flexible classification management is achieved by load type; the mobile security emergency power supply system provides uninterruptible power supply for the system's own power, lifting lighting load, and non-stop socket group through the key load bus; and provides power for the emergency socket group and other common loads through the emergency load bus. Users can flexibly arrange their use.

[0029] (1) A hybrid power station is constructed using a photovoltaic storage + generator set, and integrated with a variety of functional load output devices to form a mobile multifunctional emergency system, which can quickly provide stable and reliable emergency power and site lighting for various camps, effectively improving users' ability to cope with various risks faced by the power supply system;

[0030] (2) It has multiple power supply modes, including primary use of photovoltaic power supply, primary use of generator sets, and fault conditions, and can flexibly adapt to different load conditions and power equipment conditions;

[0031] (3) Adaptable to various on-site conditions and application scenarios, including long-term fixed use, mobile use, and external photovoltaic power generation.

[0032] The present utility model will be further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a topological diagram of an embodiment of the utility model patent;

[0034] Figure 2 This is an electrical system diagram of an embodiment of the utility model patent. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present utility model are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present utility model and are not used to limit the present utility model.

[0036] like Figure 1As shown, the mobile security emergency power supply system includes a container-type all-in-one unit, in which a control unit 1, a photovoltaic energy storage unit 2, a generator unit 3, an intelligent switching unit 4, a main power distribution unit 5, and a load unit 6 are installed. All of the above units are integrated into a container-type all-in-one unit and installed on a vehicle for easy mobile use.

[0037] like Figure 2 As shown, the photovoltaic energy storage unit 2 includes: photovoltaic panels 21, junction boxes 22, photovoltaic controllers 23, energy storage batteries 24, and battery management systems (BMS) 25; the intelligent switching unit 4 includes: bidirectional converter PCS, first contactor KM1, second contactor KM2, third contactor KM3, and critical load switch FZ; the main distribution unit 5 includes: critical load bus 51, emergency load bus 52, and backup bus 53; the load unit 6 includes: lifting lighting 61, non-stop socket group 62, system self-use power 63, emergency socket group 64, and backup circuit 65.

[0038] The control unit 1 is connected to the photovoltaic energy storage unit 2, the generator unit 3, and the intelligent switching unit 4 through a communication line, and is used to detect the operating data of the photovoltaic energy storage unit 2, the generator unit 3, and the intelligent switching unit 4, and control the operating mode of the photovoltaic energy storage unit 2 and the generator unit 3 according to the application scenario, and monitor the operating status of the intelligent switching unit 4;

[0039] The photovoltaic energy storage unit 2 is electrically connected to the intelligent switching unit 4 and outputs stored energy discharge power to the critical load bus 51 of the main power distribution unit 5, or receives output power from the generator unit 3 for charging the energy storage battery 24;

[0040] The photovoltaic panels 21, combiner box 22, and photovoltaic controller 23 of the photovoltaic energy storage unit 2 are sequentially connected to the energy storage battery 24; the photovoltaic panels 21 are installed on the top of the container-type integrated machine in a retractable structure; the combiner box 22 has reserved loop capacity for connecting to an external site to expand the photovoltaic panel capacity; the energy storage battery 24 is used to store the generated electricity of the photovoltaic panels 21 and the generator unit 3, and supply power to the load during discharge; the battery management system (BMS) 25 is used for operating data management, monitoring, and control of the energy storage battery 24, and is in communication with the control unit 1; the photovoltaic controller 23 is used to control the power output of the photovoltaic panels 21 to charge the energy storage battery 24; the combiner box 22 is used to collect photovoltaic power and supply power to the photovoltaic controller 23;

[0041] The generator unit 3 is electrically connected to the intelligent switching unit 4 to supply power to the critical load bus 51 of the main power distribution unit 5 and to charge the energy storage battery 24 of the photovoltaic energy storage unit 2;

[0042] The generator unit 3 is electrically connected to the main power distribution unit 5 to provide power to the emergency load bus 52;

[0043] The bidirectional converter PCS of the intelligent switching unit 4 is used for bidirectional conversion of AC and DC power, realizing the charging of the energy storage battery 24 by AC power and the discharge of the energy storage battery to supply power to the load; the DC side of the bidirectional converter PCS is connected to the output of the photovoltaic energy storage unit 2 through the first contactor KM1; the AC side of the bidirectional converter PCS supplies power to the critical load bus 51 through the second contactor KM2 and the critical load switch FZ; the output power of the generator unit 3 is supplied to the critical load bus 51 through the third contactor KM3 and the critical load switch FZ. The load bus 51 supplies power; seamless switching and state combination between the second contactor KM2 and the third contactor KM3 ensure seamless switching between the photovoltaic energy storage unit 2 and the generator unit 3 and the charging and discharging state conversion of the bidirectional converter PCS. This is achieved by: the bidirectional converter PCS monitors the incoming line voltage signal from the generator unit 3 and tracks the voltage amplitude, frequency, and phase in real time to ensure that one of the second contactor KM2 or the third contactor KM3 meets the synchronization condition when closed and the load side power supply is smooth and uninterrupted when disconnected;

[0044] The critical load bus 51 of the main distribution unit 5 supplies power to the loads of the lifting lighting 61, the uninterruptible power socket group 62, and the system self-use power 63 of the load unit 6 through the distribution switches Q1, Q2, and Q3-Q6 respectively; the emergency load bus 52 of the main distribution unit 5 supplies power to the loads of the emergency socket group 64 and the backup circuit 65 respectively through the distribution switches F3 and F0; the backup bus 53 of the main distribution unit 5 is used to connect the critical load bus 51 and the emergency load bus 52, and is normally open and locked for protection in normal operation mode. It can be temporarily closed for temporary power supply during fault maintenance or special operation mode;

[0045] The load unit 6 is divided into a load of a critical load bus 51 and a load of an emergency load bus 52 . Among them, (1) the load of the critical load bus 51 is the lifting lighting 61, the uninterruptible power socket group 62 and the system self-use power 63; the lifting lighting 61 is used for emergency lighting of the camp site, and at the same time provides power for the lifting device pneumatic pump and lighting control box, and provides conversion working power for the camera integrated with the same pole; the uninterruptible power socket group 62 is used to provide plug-in power for important load lines on the camp site; the system self-use power 63 is used to ensure the continuous maintenance of the load required for the startup and normal operation of the mobile security emergency power supply system, including the auxiliary power of the generator unit 3 (such as heater group, starting battery charging), the auxiliary power of the container-type integrated machine (such as air conditioning, fire protection, box lighting / emergency lighting, folding photovoltaic panel power, maintenance power), and the conversion working power of the control unit 1 (such as controller, display, switch, UPS power); (2) the load of the emergency load bus 52 is the emergency socket group 64 and the backup circuit 65; the emergency socket group 64 is used to provide plug-in power for other load lines on the camp site; the backup circuit 65 is used for temporary wiring load backup.

[0046] According to different power usage scenarios and on-site conditions, the mobile security emergency power supply system switches between multiple operating modes and selects between different scenario functions; the switching of operating modes is achieved by the control unit 1 sending a signal instruction and being controlled by the intelligent switching unit 4; including: photovoltaic energy storage main mode, generator set main mode, first half station failure mode, and second half station failure mode;

[0047] Among them, (1) the photovoltaic energy storage main mode: the generator unit 3 is used as a backup power source, and the third contactor KM3 is disconnected; the photovoltaic energy storage unit 2 is used as a main power source, and the first contactor KM1, the second contactor KM2 and the critical load switch FZ are closed, and the photovoltaic energy storage unit 2 carries the entire load of the critical load bus 51; when the state of charge (SOC) of the energy storage battery 24 reaches the set lower limit and the photovoltaic power is insufficient, the generator unit 3 starts to run, the third contactor KM3 is closed at the same time, the bidirectional converter PCS is converted to battery charging mode, and the generator unit 3 Power is supplied to the critical load bus 51 and the energy storage battery 24 is charged simultaneously. During this period, the emergency load bus 52 can also supply power to the load. When the state of charge (SOC) of the energy storage battery 24 reaches a set upper limit, the generator set unit 3 shuts down and returns to the standby state. The third contactor KM3 is disconnected, and the bidirectional converter PCS switches to battery discharge mode. The photovoltaic energy storage unit 2 supplies power to the critical load bus 51. The generator set unit 3 switches seamlessly from starting to charge the energy storage battery 24 to exiting operation after charging is complete, ensuring uninterrupted power supply to the critical load bus 51.

[0048] When the campsite has high requirements for energy conservation and emission reduction, and there is sufficient solar energy and a large-capacity fixed photovoltaic panel array is already available, and if the photovoltaic controller matching parameters and the access conditions of the combiner box are met, it is more advantageous to adopt the photovoltaic energy storage primary mode, with the generator set serving as the charging power source and backup power source. Compared with using only the limited capacity of vehicle-mounted photovoltaic panels, this can greatly reduce the number of generator set start-up and charging times and the operating time.

[0049] (2) The main mode of the generator set: the photovoltaic energy storage unit 2 is used as a backup power source, the first contactor KM1 and the second contactor KM2 are disconnected; the generator set unit 3 is used as a main power source, the third contactor KM3 and the critical load switch FZ are closed, and the generator set unit 3 carries all the loads of the emergency load bus 52 and the critical load bus 51; when the generator set unit 3 fails or is unavailable, the third contactor KM3 is disconnected, the first contactor KM1 and the second contactor KM2 are closed, and the photovoltaic energy storage unit 2 continuously supplies power to the critical load bus 51. At this time, the emergency load The load bus 52 is out of power; when the generator set unit 3 resumes normal operation, the third contactor KM3 is closed synchronously, and the second contactor KM2 and the first contactor KM1 are disconnected, achieving seamless switching, and the system resumes normal operation; during the operation of the generator set in the main mode, when the state of charge (SOC) of the energy storage battery 24 is lower than the set lower limit and the photovoltaic power is insufficient, the first contactor KM1 and the second contactor KM2 are closed synchronously, and the generator set unit 3 charges the energy storage battery 24. Charging stops when the state of charge (SOC) reaches the set upper limit, and the photovoltaic energy storage unit 2 returns to the standby state;

[0050] When the conditions for photovoltaic utilization on site are poor and energy conservation and environmental protection are not a priority, such as in emergencies or temporary short-term emergencies, and the focus is on emergency power supply and backup power supply without interruption on an emergency basis, the generator set main mode is a better choice;

[0051] When the generator unit 3 adopts a diesel generator set, the photovoltaic energy storage main mode and the generator set main mode both belong to the photovoltaic energy storage and diesel hybrid power emergency power station;

[0052] (3) The first half-station failure mode: When the photovoltaic energy storage unit 2 or the intelligent switching unit 4 is unavailable, it is disconnected and exits operation, and the generator unit 3 carries all the loads of the critical load bus 51 and the emergency load bus 52; at this time, the distribution switches Q7 and F4 of the main distribution unit 5 are disconnected, and the backup bus 53 is unlocked and placed in a closed state; when the photovoltaic energy storage unit 2 and the intelligent switching unit 4 are all available, the backup bus 53 is disconnected and locked, the distribution switches Q7 and F4 are restored to a closed state, and then the system is restored to the photovoltaic energy storage main mode or the generator set main mode as needed;

[0053] The first half-station failure mode is a common generator emergency power station (mostly diesel generator power stations) with no other power supply. This mode is used when the PV energy storage system or bidirectional converter is undergoing maintenance.

[0054] (4) The second half-station failure mode: When the generator unit 3 is unavailable, it is necessary to disconnect and exit operation, disconnect the distribution switches F1 to F2 of the main distribution unit 5, and the photovoltaic energy storage unit 2 supplies power to the critical load bus 51 through the intelligent switching unit 4. As needed, the backup bus 53 can also be unlocked and placed in a closed state, so that the photovoltaic energy storage unit 2 can reversely carry the emergency load bus 52; in the case of the second half-station failure mode, the load carried is not greater than the capacity of the photovoltaic energy storage unit 2; when the generator unit 3 is restored to be available, it is necessary to confirm that the backup bus 53 is in a disconnected and locked state, and restore the distribution switches F1 to F2 to a closed state, and then restore the system to the photovoltaic energy storage main mode or the generator set main mode as needed;

[0055] The second half-station failure mode is equivalent to a general photovoltaic energy storage power station; this mode is used during the maintenance of the generator system failure; if the photovoltaic utilization conditions are insufficient, the power supply load capacity and operating time under this mode are very limited.

[0056] Scenario functions: The container-type integrated device is detachably connected and fixed to the vehicle chassis using corner locks. The container-type integrated device can be separated from the vehicle and fixed separately at the campsite for long-term use. It can also be mobile and used on a vehicle for short-term use. When a large-capacity photovoltaic power generation device is fixedly installed at the campsite, the combiner box can be connected to overcome the insufficient capacity of the photovoltaic panels on the vehicle and improve the clean power supply capacity of the mobile security emergency power supply system.

[0057] Comprehensive load function: Flexible classification management is achieved by load type. The mobile security emergency power supply system provides uninterruptible power supply to the system's own power, lifting lighting loads, and non-stop socket groups through the key load bus 51. The emergency load bus provides power to the emergency socket group and other common loads. This allows users to flexibly arrange their use.

[0058] The above disclosure is only a specific embodiment of the present utility model and is not intended to limit the present utility model. Those skilled in the art may modify the technical solutions described in the embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the concepts and principles of the present utility model shall be included in the scope of protection of the present utility model.

Claims

1. Mobile security emergency power supply system, characterized by: It includes a container-type all-in-one machine, in which a control unit, a photovoltaic energy storage unit, a generator unit, an intelligent switching unit, a main distribution unit, and a load unit are installed; The photovoltaic energy storage unit includes photovoltaic panels, a junction box, a photovoltaic controller, an energy storage battery, and a battery management system; the intelligent switching unit includes a bidirectional converter, a first contactor, a second contactor, a third contactor, and a critical load switch; the main distribution unit includes a critical load bus, an emergency load bus, and a backup bus; the load unit includes lifting lighting, an uninterrupted power socket group, system self-use power, an emergency socket group, and a backup circuit.

2. The mobile security emergency power supply system according to claim 1, characterized in that: The control unit is communicatively connected to the photovoltaic energy storage unit, the generator unit, and the intelligent switching unit, and is used to detect operating data of the photovoltaic energy storage unit, the generator unit, and the intelligent switching unit, and control the operating modes of the photovoltaic energy storage unit and the generator unit according to the application scenario, and monitor the operating status of the intelligent switching unit; The photovoltaic energy storage unit is electrically connected to the intelligent switching unit and outputs stored energy discharge power to the critical load bus of the main power distribution unit, or receives output power from the generator unit for charging the energy storage battery; The photovoltaic panels, combiner box, and photovoltaic controller of the photovoltaic energy storage unit are connected to the energy storage battery in sequence; the photovoltaic panels are installed on the top of the container-type integrated machine in a retractable structure; the combiner box has reserved loop capacity for connecting to an external site to expand the photovoltaic panels; the energy storage battery is used to store the generated electricity of the photovoltaic panels and the generator unit, and supply power to the load during discharge; the battery management system is used for operating data management, monitoring, and control of the energy storage battery, and is in communication with the control unit; the photovoltaic controller is used to control the power generation output of the photovoltaic panels and charge the energy storage battery; the combiner box is used to collect photovoltaic power and supply power to the photovoltaic controller; The generator set unit is electrically connected to the intelligent switching unit to supply power to the critical load bus of the main power distribution unit and to charge the energy storage battery of the photovoltaic energy storage unit; The generator set unit is electrically connected to the main power distribution unit to provide power to the emergency load bus; The bidirectional converter of the intelligent switching unit is used for bidirectional conversion of AC and DC power, realizing the charging of the energy storage battery by AC power and the discharge of the energy storage battery to supply power to the load; the DC side of the bidirectional converter is connected to the output of the photovoltaic energy storage unit through the first contactor; the AC side of the bidirectional converter supplies power to the critical load bus through the second contactor and the critical load switch; the output power of the generator set unit is supplied to the critical load bus through the third contactor and the critical load switch.

3. The mobile security emergency power supply system according to claim 2, characterized in that: The bidirectional converter monitors the incoming line voltage signal from the generator unit and tracks the voltage amplitude, frequency and phase in real time to ensure that the second contactor or the third contactor meets the synchronization condition when closed and the load side power supply is smooth and uninterrupted when opened.

4. The mobile security emergency power supply system according to claim 2, characterized in that: The key load busbar of the main distribution unit supplies power to the lifting lighting, non-stop socket group, and system self-use load of the load unit through the distribution switch; the emergency load busbar of the main distribution unit supplies power to the emergency socket group and the load of the backup circuit through the distribution switch; the backup busbar of the main distribution unit is used to connect the key load busbar and the emergency load busbar, and is in the normally open state and locked for protection in normal operation, and is temporarily closed for temporary power supply during fault maintenance or special operation.

5. The mobile security emergency power supply system according to claim 2, characterized in that: The load unit is divided into the load of the critical load bus and the load of the emergency load bus, wherein: (1) the load of the critical load bus includes the lifting lighting, the uninterruptible power socket group and the system's own power; the lifting lighting is used for emergency lighting of the camp site, and at the same time provides power for the lifting device pneumatic pump and lighting control box, and provides conversion working power for the camera integrated with the same pole; the uninterruptible power socket group is used to provide plug-in power for important load lines on the camp site; the system's own power is used to ensure the continuous maintenance of the load required for the startup and normal operation of the mobile security emergency power supply system; (2) the load of the emergency load bus includes the emergency socket group and the backup circuit; the emergency socket group is used to provide plug-in power for the load lines on the camp site; the backup circuit is used for temporary wiring load backup.

6. The mobile security emergency power supply system according to claim 2, characterized in that: The mobile security emergency power supply system switches between multiple operating modes according to different power usage scenarios and on-site conditions; The switching of the operating mode is realized by the control unit sending a signal instruction and being controlled by the intelligent switching unit; including: photovoltaic energy storage main mode, generator set main mode, first half station failure mode, second half station failure mode; Among them, (1) the photovoltaic energy storage main mode: the generator set unit serves as a backup power source, and the third contactor is disconnected; the photovoltaic energy storage unit serves as a main power source, and the first contactor, the second contactor and the key load switch are closed, and the photovoltaic energy storage unit carries all the loads of the key load bus; when the charge state of the energy storage battery reaches the set lower limit and the photovoltaic is insufficient, the generator set unit starts to run, the third contactor is closed at the same time, and the bidirectional converter is converted to a battery charging mode, and the generator set unit supplies power to the key load bus and charges the energy storage battery at the same time. During this period, the emergency load bus can supply power to the load; when the charge state of the energy storage battery reaches the set upper limit, the generator set unit stops and returns to the standby state, the third contactor is disconnected, the bidirectional converter is converted to a battery discharge mode, and the photovoltaic energy storage unit supplies power to the key load bus; the process of the generator set unit starting to charge the energy storage battery and exiting the operation after charging is completed is seamless switching, ensuring uninterrupted power supply to the key load bus; (2) The generator set main mode: the photovoltaic energy storage unit serves as a backup power source, the first contactor and the second contactor are disconnected; the generator set unit serves as a main power source, the third contactor and the critical load switch are closed, and the generator set unit carries all the loads of the emergency load bus and the critical load bus; when the generator set unit fails or is unavailable, the third contactor is disconnected, the first contactor and the second contactor are closed, and the photovoltaic energy storage unit continuously supplies power to the critical load bus, at which time the emergency load bus is out of power; when the generator set unit resumes normal operation, the third contactor is closed at the same time, and the second contactor and the first contactor are disconnected, achieving seamless switching, and the system resumes normal operation; during the operation of the generator set in the main mode, when the state of charge of the energy storage battery is lower than the set lower limit and the photovoltaic power is insufficient, the first contactor and the second contactor are closed at the same time, and the generator set unit charges the energy storage battery. Charging stops when the state of charge reaches the set upper limit, and the photovoltaic energy storage unit returns to the standby state; (3) The first half-station failure mode: When the photovoltaic energy storage unit or the intelligent switching unit is unavailable, it is disconnected and exits operation, and the generator set unit carries all the loads of the critical load bus and the emergency load bus; at this time, the distribution switch of the main distribution unit is disconnected, and the standby bus is unlocked and placed in a closed state; when the photovoltaic energy storage unit and the intelligent switching unit are all available, the standby bus is disconnected and locked, the distribution switch is restored to a closed state, and then the system is restored to the photovoltaic energy storage main mode or the generator set main mode as needed; (4) The second half-station failure mode: When the generator set unit is unavailable, it is disconnected and exits operation, the distribution switch of the main distribution unit is disconnected, and the photovoltaic energy storage unit supplies power to the critical load bus through the intelligent switching unit, or the standby bus is unlocked and placed in a closed state, so that the photovoltaic energy storage unit reverses the emergency load bus; in the case of the second half-station failure mode, the load carried is not greater than the capacity of the photovoltaic energy storage unit; when the generator set unit is restored to be available, it is confirmed that the standby bus is in a disconnected and locked state, and the distribution switch is restored to a closed state, and then the system is restored to the photovoltaic energy storage main mode or the generator set main mode as needed.

7. The mobile security emergency power supply system according to claim 2, characterized in that: According to different power usage scenarios and site conditions, the mobile security emergency power supply system adopts a selection between different functions, including scenario function and comprehensive load function; (1) The scenario function: The container-type integrated machine is connected and fixed to the vehicle chassis in a detachable manner; the container-type integrated machine is separated from the vehicle and fixed alone at the camp site for long-term use; or it is installed on the vehicle for short-term mobile use; when a large-capacity photovoltaic power generation equipment is fixedly installed at the camp site, the junction box is connected; (2) The comprehensive load function: flexible classification management is achieved according to load type; the mobile security emergency power supply system provides uninterruptible power supply for the system's own power, lifting lighting load, and non-stop power socket group through the key load bus; and provides power for the emergency socket group and ordinary loads through the emergency load bus.

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