Intelligent power distribution cabinet for expressway tunnel based on photovoltaic power supply

Abstract

The utility model relates to an intelligent power distribution cabinet for a highway tunnel based on photovoltaic power supply, which comprises a three-power-supply power distribution cabinet body, and a double-busbar assembly for a mains supply / photovoltaic power supply, a double-busbar assembly for a generator / photovoltaic power supply and an intelligent control system are arranged in the three-power-supply power distribution cabinet body. The three-power-supply power distribution cabinet body is provided with a commercial power interface, a generator interface and a photovoltaic power generation system interface, and the commercial power / photovoltaic power supply double-busbar assembly and the generator / photovoltaic power supply double-busbar assembly are connected with external photovoltaic power generation equipment through the photovoltaic double-switch and the photovoltaic power generation system interface. And a switching circuit breaker is arranged between the commercial power switch and the generator switch between the dual-busbar assembly for the commercial power / photovoltaic power supply and the dual-busbar assembly for the generator / photovoltaic power supply. According to the utility model, three power supplies of commercial power, generator and photovoltaic power supply can be carried out on electric equipment in the highway tunnel, environmental protection is realized, energy is saved, tunnel power supply reliability is improved, and highway tunnel operation safety is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of power distribution cabinets, and in particular to an intelligent power distribution cabinet for a highway tunnel based on photovoltaic power supply. Background Art

[0002] Conventional highway tunnel lighting is divided into normal lighting, emergency lighting, and enhanced lighting. Normal lighting is used when the power supply line is operating normally and the tunnel is in normal traffic. Emergency lighting is used when the power supply line fails or stops supplying power. The tunnel lighting is powered by a generator. Due to the small capacity of the generator, it generally only provides tunnel emergency lighting to meet the minimum illumination requirements of the tunnel. Enhanced lighting is set at the entrance of the tunnel. When the weather is clear and there is sufficient light outside the tunnel, it is set to ensure that the driver can see the road, vehicles and people clearly when entering and passing through the tunnel. When the driver enters the relatively dim tunnel from the bright outside, this will cause discomfort and visual confusion to the driver. By enhancing the lighting, the light intensity inside and outside the tunnel is basically the same, so that the driver can better adapt and reduce the occurrence of accidents.

[0003] At present, highway lighting is mainly powered by city electricity, and tunnel lighting has a large load and high operating costs. With the development of photovoltaic power generation, it is possible to use photovoltaic power supply for highway tunnel electrical equipment. Given the limited land area of ​​highways, the conditions for the construction of large-scale photovoltaic power stations are not met. Utility Model Content

[0004] The utility model aims to solve the deficiencies of the prior art and provide an intelligent power distribution cabinet for a highway tunnel based on photovoltaic power supply, providing a new solution for the application of small-scale photovoltaic power stations in high-speed tunnels.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] An intelligent power distribution cabinet for a highway tunnel based on photovoltaic power supply comprises a three-power distribution cabinet body, wherein a double busbar assembly for a mains / photovoltaic power supply, a double busbar assembly for a generator / photovoltaic power supply, and an intelligent control system are arranged in the three-power distribution cabinet body, a mains interface, a generator interface, and a photovoltaic power generation system interface are arranged on the three-power distribution cabinet body, the double busbar assembly for the mains / photovoltaic power supply is connected to an external mains via a mains switch and a mains interface, the double busbar assembly for the generator / photovoltaic power supply is connected to an external generator via a generator switch and a generator interface, the double busbar assembly for the mains / photovoltaic power supply and the double busbar assembly for the generator / photovoltaic power supply are connected to an external photovoltaic power generation device via a photovoltaic double switch and a photovoltaic power generation system interface, a switching circuit breaker is arranged between the double busbar assembly for the mains / photovoltaic power supply and the double busbar assembly for the generator / photovoltaic power supply, and between the mains switch and the generator switch, and the intelligent control system is connected to the double busbar assembly for the mains / photovoltaic power supply, the double busbar assembly for the generator / photovoltaic power supply, the mains switch, the generator switch, the photovoltaic double switch, and the switching circuit breaker.

[0007] The three-power distribution cabinet is equipped with a left-line fan interface, a right-line fan interface, a left-line water pump interface, a right-line water pump interface, a fire pump interface, a left-line normal lighting interface, a right-line normal lighting interface, a left-line enhanced lighting interface, a right-line enhanced lighting interface, a left-line emergency lighting interface, a right-line emergency lighting interface, a left-line monitoring interface, a right-line monitoring interface, a left-line traffic light interface, a right-line traffic light interface, a left-line lane indicator interface, a right-line lane indicator interface, and a tunnel fire alarm system interface, which are connected to the double busbar assembly for the mains / photovoltaic power supply and the double busbar assembly for the generator / photovoltaic power supply;

[0008] The left-line fan interface and the right-line fan interface are connected to the external tunnel fan; the left-line water pump interface, the right-line water pump interface and the fire water pump interface are connected to the external tunnel water pump; the left-line normal lighting interface, the right-line normal lighting interface, the left-line enhanced lighting interface, the right-line enhanced lighting interface, the left-line emergency lighting interface and the right-line emergency lighting interface are connected to the external tunnel lighting equipment; the left-line monitoring interface and the right-line monitoring interface are connected to the external tunnel monitoring equipment; the left-line traffic light interface, the right-line traffic light interface, the left-line lane indicator interface and the right-line lane indicator interface are connected to the external tunnel signal indicator light; the tunnel fire alarm system interface is connected to the external tunnel fire alarm equipment.

[0009] The left-line fan interface, right-line fan interface, left-line water pump interface, right-line water pump interface, and fire water pump interface are connected to the AC power switch, switching circuit breaker, and generator switch using a single switch.

[0010] The left lane normal lighting interface, the right lane normal lighting interface, the left lane enhanced lighting interface, the right lane enhanced lighting interface, the left lane emergency lighting interface, the right lane emergency lighting interface, the left lane monitoring interface, the right lane monitoring interface, the left lane traffic light interface, the right lane traffic light interface, the left lane lane indicator interface, the right lane indicator interface, and the tunnel fire alarm system interface are connected with the AC power switch, the switching circuit breaker, the generator switch and the photovoltaic double switch using double switches.

[0011] The intelligent control system includes a signal collection module, a central control module and a control execution module; the signal collection module is connected to the mains, generator, photovoltaic power generation equipment, tunnel fan, tunnel lighting equipment, tunnel monitoring equipment, tunnel signal indicator light, and tunnel fire alarm equipment through signal lines; the central control module determines the status of the power supply and load in the three-power distribution cabinet; the control execution module is connected to the mains switch, generator switch, photovoltaic double switch, switching circuit breaker, single switch and double switch of each load in the three-power distribution cabinet.

[0012] The beneficial effects of the utility model are as follows: the utility model can realize power supply of three power sources, namely, mains electricity, generator and photovoltaic power, to the electrical equipment in the highway tunnel, which is green and environmentally friendly, saves energy, reduces the operation cost of the tunnel, improves the reliability of the tunnel power supply, and ensures the safe operation of the highway tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] In the figure: 1- three-power distribution cabinet; 2- double busbar assembly for mains / photovoltaic power; 3- double busbar assembly for generator / photovoltaic power; 4- intelligent control system; 5- mains interface; 6- generator interface; 7- photovoltaic power generation system interface; 8- mains switch; 9- generator switch; 10- photovoltaic double switch; 11- switching circuit breaker; 12- left line fan interface; 13- right line fan interface; 14- left line water pump interface; 15- right line water pump interface; 16- fire water Pump interface; 17-left line normal lighting interface; 18-right line normal lighting interface; 19-left line enhanced lighting interface; 20-right line enhanced lighting interface; 21-left line emergency lighting interface; 22-right line emergency lighting interface; 23-left line monitoring interface; 24-right line monitoring interface; 25-left line traffic light interface; 26-right line traffic light interface; 27-left line lane indicator interface; 28-right line lane indicator interface; 29-tunnel fire alarm system interface;

[0015] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0016] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer according to the following description. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0017] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0020] An intelligent power distribution cabinet for highway tunnels based on photovoltaic power supply, such as Figure 1As shown, it comprises a three-power distribution cabinet body 1, in which a double busbar assembly 2 for mains / photovoltaic power supply, a double busbar assembly 3 for generator / photovoltaic power supply, and an intelligent control system 4 are arranged, and a mains interface 5, a generator interface 6, and a photovoltaic power generation system interface 7 are arranged on the three-power distribution cabinet body 1. The double busbar assembly 2 for mains / photovoltaic power supply is connected to the external mains through a mains switch 8 and the mains interface 5, and the double busbar assembly 3 for generator / photovoltaic power supply is connected to the external generator through a generator switch 9 and the generator interface 6. The double busbar assembly 2 for the mains power source and the double busbar assembly 3 for the generator / photovoltaic power source are connected to the external photovoltaic power generation equipment through the photovoltaic double switch 10 and the photovoltaic power generation system interface 7. A switching circuit breaker 11 is provided between the double busbar assembly 2 for the mains power / photovoltaic power source and the double busbar assembly 3 for the generator / photovoltaic power source and between the mains switch 8 and the generator switch 9. The intelligent control system 4 is connected to the double busbar assembly 2 for the mains power / photovoltaic power source, the double busbar assembly 3 for the generator / photovoltaic power source, the mains switch 8, the generator switch 9, the photovoltaic double switch 10, and the switching circuit breaker 11.

[0021] The three-power distribution cabinet body 1 is provided with a left-line fan interface 12, a right-line fan interface 13, a left-line water pump interface 14, a right-line water pump interface 15, a fire pump interface 16, a left-line normal lighting interface 17, a right-line normal lighting interface 18, a left-line enhanced lighting interface 19, a right-line enhanced lighting interface 20, a left-line emergency lighting interface 21, a right-line emergency lighting interface 22, a left-line monitoring interface 23, a right-line monitoring interface 24, a left-line traffic signal light interface 25, a right-line traffic signal light interface 26, a left-line lane indicator interface 27, a right-line lane indicator interface 28, and a tunnel fire alarm system interface 29, which are connected to the double busbar assembly 2 for the mains / photovoltaic power supply and the double busbar assembly 3 for the generator / photovoltaic power supply;

[0022] The left-line fan interface 12 and the right-line fan interface 13 are connected to the external tunnel fan; the left-line water pump interface 14, the right-line water pump interface 15 and the fire water pump interface 16 are connected to the external tunnel water pump; the left-line normal lighting interface 17, the right-line normal lighting interface 18, the left-line enhanced lighting interface 19, the right-line enhanced lighting interface 20, the left-line emergency lighting interface 21 and the right-line emergency lighting interface 22 are connected to the external tunnel lighting equipment; the left-line monitoring interface 23 and the right-line monitoring interface 24 are connected to the external tunnel monitoring equipment; the left-line traffic signal light interface 25, the right-line traffic signal light interface 26, the left-line lane indicator interface 27 and the right-line lane indicator interface 28 are connected to the external tunnel signal indicator light; the tunnel fire alarm system interface 29 is connected to the external tunnel fire alarm equipment.

[0023] Specifically:

[0024] The left-line fan interface 12 is connected to the left-line fan, the right-line fan interface 13 is connected to the right-line fan, the left-line water pump interface 14 is connected to the left-line water pump, the right-line water pump interface 15 is connected to the right-line water pump, the fire pump interface 16 is connected to the fire pump, the left-line normal lighting interface 17 is connected to the left-line normal lighting lamp, the right-line normal lighting interface 18 is connected to the right-line normal lighting lamp, the left-line enhanced lighting interface 19 is connected to the left-line enhanced lighting lamp, the right-line enhanced lighting interface 20 is connected to the right-line enhanced lighting lamp, and the left-line emergency lighting interface 21 is connected to The left lane emergency lighting is connected, the right lane emergency lighting interface 22 is connected to the right lane emergency lighting, the left lane monitoring interface 23 is connected to the left lane monitoring, the right lane monitoring interface 24 is connected to the right side monitoring, the left lane traffic signal light interface 25 is connected to the left lane traffic signal light, the right lane traffic signal light interface 26 is connected to the right lane traffic signal light, the left lane indicator interface 27 is connected to the left lane indicator, the right lane indicator interface 28 is connected to the right lane indicator, and the tunnel fire alarm system interface 29 is connected to the tunnel fire alarm system.

[0025] The left-line fan interface 12, the right-line fan interface 13, the left-line water pump interface 14, the right-line water pump interface 15, and the fire water pump interface 16 are connected to the AC switch 8, the switching circuit breaker 11, and the generator switch 9 using a single switch.

[0026] The single power switch is mainly used to supply power to high-power fans and water pumps. The power supply mainly comes from the mains, and can also be supplied by an emergency generator depending on the operating status of the tunnel.

[0027] The left-line normal lighting interface 17, the right-line normal lighting interface 18, the left-line enhanced lighting interface 19, the right-line enhanced lighting interface 20, the left-line emergency lighting interface 21, the right-line emergency lighting interface 22, the left-line monitoring interface 23, the right-line monitoring interface 24, the left-line traffic light interface 25, the right-line traffic light interface 26, the left-line lane indicator interface 27, the right-line lane indicator interface 28, and the tunnel fire alarm system interface 29 are connected to the AC switch 8, the switching circuit breaker 11, the generator switch 9, and the photovoltaic double switch 10 using double switches.

[0028] The double switch mainly supplies power to non-power equipment such as tunnel lighting, monitoring, signal lights, lane indicators, fire alarm systems, etc.

[0029] The three-power distribution cabinet body 1 is a low-voltage distribution equipment housing that meets the protection level requirements.

[0030] A switching circuit breaker 11 is connected between the mains and the emergency generator. When the mains is normal, the switching circuit breaker 11 closes the mains power supply and supplies power to the equipment in the tunnel together with the photovoltaic power generation equipment. The mains / photovoltaic power supply double busbar assembly 2 can realize that the mains and photovoltaic power generation equipment supply power to the equipment in the tunnel at the same time, and realize automatic switching through the photovoltaic double switch 10.

[0031] When the city power is abnormal, the switching circuit breaker 11 closes the generator power supply. The generator / photovoltaic power supply uses a double busbar assembly 3 to enable the generator power supply and the photovoltaic power generation equipment to supply power to the equipment in the tunnel at the same time, and automatic switching is achieved through the photovoltaic double switch 10.

[0032] The photovoltaic dual switch 10 is an actuator for switching three power sources, and completes power switching according to the instructions of the intelligent control system 4.

[0033] The intelligent control system 4 includes a signal collection module, a central control module and a control execution module.

[0034] The signal collection module is connected to the mains, generator, photovoltaic power generation equipment, tunnel fan, tunnel lighting equipment, tunnel monitoring equipment, tunnel signal indicator light, and tunnel fire alarm equipment through signal lines to collect all power status signals and loop operation signals. For the mains and generator, the power operation status is mainly collected; for the photovoltaic power generation system, the real-time power generation and real-time lighting conditions of the photovoltaic power generation equipment are mainly collected; for the load end, the load operation status and the load power consumption are collected.

[0035] The central control module determines the status of the power supply and load in the three-power distribution cabinet 1, including: a. When the city power and photovoltaic power are normal, the highway tunnel operates normally. According to the power generation of the photovoltaic power, the photovoltaic double switch 10 in the three-power distribution cabinet 1 is continuously controlled through the intelligent control system 4, and the power supply of the electrical equipment is switched to the photovoltaic system according to the power generation of the photovoltaic system, which is helpful for energy conservation and emission reduction. b. When the city power fails, the highway tunnel is in an emergency state. At this time, the emergency generator starts to supply power to the secondary electrical equipment in the tunnel. During the day, some equipment can be switched to photovoltaic power supply to reduce the fuel consumption of the generator. When the lighting conditions are good and the capacity of the photovoltaic power supply system is sufficient, the normal operation of the tunnel during the day can be guaranteed, and the power supply reliability can be improved. c. When both the city power and the emergency generator power supply fail, the battery of the photovoltaic power generation system can be used to keep the emergency power supply and low-power electrical equipment in the tunnel powered.

[0036] The control execution module is connected with the mains switch 8, the generator switch 9, the photovoltaic double switch 10, the switching circuit breaker 11, and the single switch and double switch of each load in the three-power distribution cabinet 1.

[0037] The enhanced lighting of highway tunnels is mainly used when the natural light intensity outside the tunnel is high. In order to avoid eye discomfort for drivers after entering the tunnel, enhanced lighting is set at the tunnel entrance to make the light intensity inside and outside the tunnel basically the same. This is the peak time for photovoltaic power generation system. Photovoltaic power supply can be used to power the enhanced lighting of the tunnel. Photovoltaic power generation and tunnel lighting operation mode are highly complementary.

[0038] The capacity of the photovoltaic power generation system is configured according to the red line range of the highway land, and the power supply range of the photovoltaic power generation system can be flexibly adjusted. After the capacity of the photovoltaic power generation system is determined, the design, calculation and selection of the capacity of the mains transformer and generator are carried out. The circuit within the power supply range of the photovoltaic power generation system is powered by a dual power supply switch, and the order of photovoltaic power supply is determined according to the importance of the load. For example, the highest level is level one, fire alarm and emergency lighting are set to level one, traffic signal lane indicators and normal lighting are set to level two, and enhanced lighting, tunnel fans and water pumps are set to level three to ensure that the power generation capacity of the photovoltaic system is fully utilized and the power supply is dynamically adjusted through this device.

[0039] The main functions of this utility model are as follows:

[0040] 1. Configure according to the photovoltaic resource conditions of different highways;

[0041] The application of photovoltaic power supply systems in highway tunnels is limited by the geographical location and lighting conditions of highway construction. The utility model can configure the power supply range of the photovoltaic power generation system according to the three-power distribution cabinet, efficiently utilize local photovoltaic energy, save operating costs, reduce carbon emissions, and expand or reduce the scale of photovoltaic power generation according to changes in photovoltaic resource conditions.

[0042] 2. Dynamically configure the power supply for the power load according to the equipment operation status;

[0043] The system can dynamically detect the power consumption of the circuit according to the signal collection module, count the power load of the tunnel equipment in real time, dynamically match it with the capacity of the photovoltaic power generation system, and give the best power distribution plan through the calculation of the intelligent control system 4, so that the photovoltaic power generation system is always in a state of operation close to full load, and photovoltaic energy is used efficiently.

[0044] 3. It can reduce the capacity of the power distribution system and reduce the cost of the power distribution system;

[0045] The capacity of the mains transformer can be reduced, as can the capacity of the generator equipment and the amount of fuel stored, thus reducing the operating losses of the original power distribution system and the primary construction cost.

[0046] 4. Improved the reliability of highway tunnel power supply system;

[0047] Through logical judgment of different power supply states and tunnel operation states, power is dynamically allocated to make the power supply system more stable. It can basically ensure the normal operation of tunnel maintenance lighting and monitoring during the day when the mains and generators are out of service.

[0048] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. An intelligent power distribution cabinet for a highway tunnel based on photovoltaic power supply, characterized in that: The invention comprises a three-power distribution cabinet (1), wherein the three-power distribution cabinet (1) is provided with a double busbar assembly (2) for mains power / photovoltaic power, a double busbar assembly (3) for generator / photovoltaic power, and an intelligent control system (4); the three-power distribution cabinet (1) is provided with a mains interface (5), a generator interface (6), and a photovoltaic power generation system interface (7); the double busbar assembly (2) for mains power / photovoltaic power is connected to an external mains power through a mains switch (8) and the mains interface (5); the double busbar assembly (3) for generator / photovoltaic power is connected to an external generator through a generator switch (9) and the generator interface (6); The busbar assembly (2) and the double busbar assembly (3) for the generator / photovoltaic power supply are connected to the external photovoltaic power generation equipment through the photovoltaic double switch (10) and the photovoltaic power generation system interface (7); a switching circuit breaker (11) is provided between the double busbar assembly (2) for the mains power / photovoltaic power supply and the double busbar assembly (3) for the generator / photovoltaic power supply and between the mains switch (8) and the generator switch (9); and the intelligent control system (4) is connected to the double busbar assembly (2) for the mains power / photovoltaic power supply, the double busbar assembly (3) for the generator / photovoltaic power supply, the mains switch (8), the generator switch (9), the photovoltaic double switch (10), and the switching circuit breaker (11).

2. According to claim 1, a photovoltaic-powered intelligent power distribution cabinet for a highway tunnel is characterized in that: The three-power distribution cabinet (1) is provided with a left-line fan interface (12), a right-line fan interface (13), a left-line water pump interface (14), a right-line water pump interface (15), a fire pump interface (16), a left-line normal lighting interface (17), a right-line normal lighting interface (18), a left-line enhanced lighting interface (19), a right-line enhanced lighting interface (20), a left-line emergency lighting interface (21), a right-line emergency lighting interface (22), a left-line monitoring interface (23), a right-line monitoring interface (24), a left-line traffic signal light interface (25), a right-line traffic signal light interface (26), a left-line lane indicator interface (27), a right-line lane indicator interface (28), and a tunnel fire alarm system interface (29); The left-line fan interface (12) and the right-line fan interface (13) are connected to an external tunnel fan; the left-line water pump interface (14), the right-line water pump interface (15) and the fire pump interface (16) are connected to an external tunnel water pump; the left-line normal lighting interface (17), the right-line normal lighting interface (18), the left-line enhanced lighting interface (19), the right-line enhanced lighting interface (20), the left-line emergency lighting interface (21) and the right-line emergency lighting interface (22) are connected to an external tunnel lighting device; the left-line monitoring interface (23) and the right-line monitoring interface (24) are connected to an external tunnel monitoring device; the left-line traffic signal light interface (25), the right-line traffic signal light interface (26), the left-line lane indicator interface (27) and the right-line lane indicator interface (28) are connected to an external tunnel signal indicator light; and the tunnel fire alarm system interface (29) is connected to an external tunnel fire alarm device.

3. According to claim 2, a photovoltaic-powered intelligent power distribution cabinet for a highway tunnel is characterized in that: The left-line fan interface (12), the right-line fan interface (13), the left-line water pump interface (14), the right-line water pump interface (15), and the fire pump interface (16) are connected to the mains switch (8), the switching circuit breaker (11), and the generator switch (9) by a single switch.

4. According to claim 3, a photovoltaic-powered intelligent power distribution cabinet for a highway tunnel is characterized in that: The left lane normal lighting interface (17), the right lane normal lighting interface (18), the left lane enhanced lighting interface (19), the right lane enhanced lighting interface (20), the left lane emergency lighting interface (21), the right lane emergency lighting interface (22), the left lane monitoring interface (23), the right lane monitoring interface (24), the left lane traffic light interface (25), the right lane traffic light interface (26), the left lane lane indicator interface (27), the right lane lane indicator interface (28), and the tunnel fire alarm system interface (29) are connected to the mains switch (8), the switching circuit breaker (11), the generator switch (9), and the photovoltaic double switch (10) by using double switches.

5. The intelligent power distribution cabinet for a highway tunnel based on photovoltaic power supply according to claim 4 is characterized in that: The intelligent control system (4) comprises a signal collection module, a central control module and a control execution module; the signal collection module is connected to the mains, a generator, photovoltaic power generation equipment, a tunnel fan, a tunnel lighting equipment, a tunnel monitoring equipment, a tunnel signal indicator light and a tunnel fire alarm device through a signal line; the central control module determines the state of the power supply and load in the three-power distribution cabinet (1); the control execution module is connected to the mains switch (8), the generator switch (9), the photovoltaic double switch (10), the switching circuit breaker (11), and the single switch and double switch of each load in the three-power distribution cabinet (1).

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