Hybrid power supply system and control method thereof

Abstract

The invention provides a hybrid power supply system and a control method thereof, and relates to the technical field of power supply equipment. The hybrid power supply system comprises a power supply system, a power supply system, a monitoring system and a photovoltaic off-grid and grid-connected system, wherein the power supply system is used for supplying power to the power supply system, the monitoring system and the photovoltaic off-grid and grid-connected system; the power supply system is used for generating electric energy based on the power supply system and transmitting the electric energy to the monitoring system and the photovoltaic off-grid and grid-connected system; the monitoring system is used for monitoring the power supply system and the photovoltaic off-grid and grid-connected system, the monitoring system comprises a fire fighting system and an SMS system, and the fire fighting system comprises smoke detection equipment, temperature detection equipment, a fire extinguishing system, a smoke exhaust system and harmful gas detection equipment; the SMS system comprises a load monitoring module, an optical power monitoring module and a temperature field monitoring module; and the photovoltaic off-grid and grid-connected system is used for converting the solar energy collected by the solar cell panel into electric energy and storing the electric energy through an energy storage battery.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power supply equipment, in particular to a hybrid power supply system and a control method thereof. BACKGROUND

[0002] Solar energy resources have no geographical restrictions, are widely distributed and inexhaustible. Solar cell modules have simple structures, small volumes and light weights, are convenient to transport and install, have short construction periods, and can be easily combined and expanded according to the capacity of the electrical load. In addition, the process of solar photovoltaic power generation does not involve mechanical rotating parts, does not require cooling water, does not consume fuel, does not emit any substances including greenhouse gases, has no noise and no pollution, is stable and reliable in performance, and has a long service life. Therefore, compared with other new power generation technologies, solar photovoltaic power generation is an ideal clean energy power generation technology.

[0003] Solar radiation is intermittent and volatile, and user loads are also constantly changing, which causes a mismatch between photovoltaic power generation and user loads in an off-grid state. Energy storage devices are mainly used to smooth the mismatch between photovoltaic power and loads, in order to ensure autonomous operation of the system. Hybrid power supply systems usually use energy storage devices to store excess photovoltaic power during the day and release it at night to ensure continuous power supply in an off-grid state. However, existing hybrid power supply systems lack protection strategies, which can easily lead to unstable photovoltaic power supply quality. SUMMARY

[0004] Therefore, the present application provides a hybrid power supply system and a control method thereof.

[0005] In a first aspect, the embodiments of the present application provide a hybrid power supply system, comprising:

[0006] a power supply system, a power supply system, a monitoring system and a photovoltaic off-grid and grid-connected system;

[0007] The power supply system is configured to supply power to the power supply system, the monitoring system and the photovoltaic off-grid and grid-connected system.

[0008] The power supply system is configured to generate power based on the power supply system and deliver the power to the monitoring system and the photovoltaic off-grid and grid-connected system.

[0009] The monitoring system is configured to monitor the power supply system and the photovoltaic off-grid and grid-connected system. The monitoring system comprises a fire-fighting system and an SMS system. The fire-fighting system comprises a smoke detection device, a temperature detection device, a fire extinguishing system, a smoke exhaust system and a harmful gas detection device. The SMS system comprises a load monitoring module, a light power monitoring module and a temperature field monitoring module.

[0010] Photovoltaic off-grid system: for converting solar energy collected by solar panels into electrical energy and storing the electrical energy through energy storage batteries.

[0011] The hybrid power supply system according to the embodiments of the present application can have the following additional technical features.

[0012] In the above technical solution, the smoke detection device is configured to detect the inside of the power supply system and the photovoltaic off-grid system, and send an alarm signal when the smoke concentration is greater than a first preset threshold.

[0013] The temperature detection device is configured to detect the inside of the power supply system and the photovoltaic off-grid system, and send an alarm signal when the temperature is greater than a second preset threshold.

[0014] The fire extinguishing system is configured to release fire extinguishing agent after receiving the alarm signal.

[0015] The smoke exhaust system is configured to exhaust smoke and toxic gas after receiving the alarm signal.

[0016] The harmful gas detection device is configured to continuously monitor the harmful gas concentration inside the power supply system and the photovoltaic off-grid system, and cancel the alarm signal when the harmful gas concentration is less than a third preset threshold.

[0017] In any of the above technical solutions, the fire extinguishing system further includes a water fire extinguishing system and a power cut-off system.

[0018] The water fire extinguishing system is arranged inside the power supply system and the photovoltaic off-grid system, and is configured to perform water fire extinguishing treatment after receiving the alarm signal.

[0019] The power cut-off system is configured to cut off the power supply of the power supply system and the photovoltaic off-grid system after receiving the alarm signal.

[0020] In any of the above technical solutions, the load monitoring module is configured to monitor the load of the internal devices of the power supply system and the photovoltaic off-grid system.

[0021] The optical power monitoring module is configured to provide data basis for the design and application of the solar panels of the photovoltaic off-grid system by measuring the optical power.

[0022] The temperature field monitoring module is configured to keep the temperature of the solar panels below a fourth preset threshold by monitoring the temperature of the solar panels with a temperature instrument.

[0023] In any of the above technical solutions, the calculation formula of the optical power in the SMS system is:

[0024] GL = (Dir θa x S x SL) x ZL

[0025] In the formula, GL is solar light power, Dir is the total amount of direct sunlight of the solar panel, S is the sunlight area of the solar panel, SL is the sunlight area utilization coefficient, and ZL is the component conversion efficiency.

[0026] In any of the above technical solutions, optionally, the calculation formula of the temperature coefficient of the monitored solar panel in the SMS system is:

[0027]

[0028] In the formula, WD is the temperature coefficient, U is the rated voltage, T2 is the corresponding high temperature, T1 is the corresponding low temperature, represents the linear voltage under the T2 environment, represents the linear voltage under the T1 environment.

[0029] In any of the above technical solutions, optionally, the power supply system includes a TN system, an IT system, and a TT system.

[0030] The TN system includes a TN-S system, a TN-C system, and a TN-C-S system.

[0031] In any of the above technical solutions, optionally, the photovoltaic off-grid system includes a solar panel, a charge-discharge controller, an energy storage battery, and an inverter.

[0032] The energy storage battery is designed in a modular manner, and each energy storage battery includes an independent battery pack and a charge-discharge controller. The solar panel is provided with a thermal management system that adopts liquid cooling, air cooling, and phase change material cooling technology, and combines intelligent temperature control technology to adjust the temperature in real time.

[0033] In any of the above technical solutions, optionally, the system further includes:

[0034] The intelligent dispatching system includes a data acquisition layer, a communication transmission layer, a data processing layer, an application decision layer, and a human-computer interaction layer.

[0035] The data acquisition layer acquires the operation data and equipment state information of the power supply system, the power supply system, the monitoring system, and the photovoltaic off-grid system in real time through an intelligent electric meter.

[0036] The communication transmission layer transmits the acquired operation data and equipment state information to the dispatching center by using optical fiber communication.

[0037] The data processing layer cleans, stores, analyzes, and extracts key information from the acquired operation data and equipment state information.

[0038] Application decision layer: based on the key information provided by the data processing layer, using intelligent algorithms and expert systems, realizing the functions of real-time monitoring, fault warning and scheduling decision of the power supply system, power supply system, monitoring system and photovoltaic off-grid and grid-connected system;

[0039] Human-computer interaction layer: providing an operation interface for the dispatch personnel to monitor the running state of the power supply system, power supply system, monitoring system and photovoltaic off-grid and grid-connected system, and triggering the scheduling instruction.

[0040] In the second aspect, the embodiments of the present application provide a control method of a hybrid power supply system, applied to the hybrid power supply system of the first aspect, and the method comprises:

[0041] Powering the power supply system, monitoring system and photovoltaic off-grid and grid-connected system through the power supply system;

[0042] Generating electric energy based on the power supply system through the power supply system, and delivering the electric energy to the monitoring system and photovoltaic off-grid and grid-connected system;

[0043] Monitoring the power supply system and photovoltaic off-grid and grid-connected system through the monitoring system;

[0044] Converting solar energy collected by the solar cell panel into electric energy through the photovoltaic off-grid and grid-connected system, and storing the electric energy through the energy storage battery.

[0045] The hybrid power supply system and the control method thereof in the embodiments of the present application, the present application utilizes the power supply to electrically connect the power supply with the power supply system, monitoring system and photovoltaic off-grid and grid-connected system, and provides electric quantity to the power supply system, monitoring system and photovoltaic off-grid and grid-connected system, for guaranteeing the daily operation and maintenance of the equipment. The present application converts light energy into electric energy through the solar cell panel, and stores the converted electric energy through the energy storage battery. At the same time, the present application protects the battery through the charge and discharge controller to prevent overcharging or overdischarging, and electrically connects the power supply system to deliver electric energy to the outside through the power supply system. The present application monitors the power supply system and photovoltaic off-grid and grid-connected system through the monitoring system, and when a problem occurs, the present application processes the power supply system and photovoltaic off-grid and grid-connected system through the fire fighting system. At the same time, the present application monitors the load, solar light power and temperature coefficient of the solar cell panel through load monitoring, light power monitoring and temperature field monitoring. By setting the monitoring system for the power supply system, the stability of the power supply quality of the power supply system can be improved.

[0046] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented in accordance with the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0047] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0048] Figure 1 A structural block diagram of the hybrid power supply system of the embodiment of the application is shown;

[0049] Figure 2 A flowchart of the control method of the hybrid power supply system of the embodiment of the application is shown. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the application will be clearly described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some, but not all of the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the application.

[0051] The terms "first", "second", etc. in the specification and claims of the application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of a kind and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the objects before and after are in an "or" relationship.

[0052] The hybrid power supply system and the control method thereof provided by the embodiments of the application will be described in detail below with reference to the drawings, specific embodiments and application scenarios, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0053] The embodiments of the application provide a hybrid power supply system, as shown in the figure, which comprises: Figure 1

[0054] The power supply system 101, the power supply system 102, the monitoring system 103 and the photovoltaic off-grid system 104;

[0055] The power supply system 101 is used to supply power to the power supply system 102, the monitoring system 103 and the photovoltaic off-grid system 104 to ensure the daily operation and maintenance of the equipment.

[0056] ​Power supply system 102: for generating electric energy based on power supply system 101, and delivering the electric energy to monitoring system 103 and photovoltaic off-grid system 104. In an embodiment, power supply system 102 includes TN system 121, IT system 122 and TT system 123. Among them, TN system is a protective zero system, T represents a point on the PEN line or neutral line, which is directly connected with the ground without impedance, in order to electrically connect the photovoltaic off-grid system, and N represents that the exposed conductive part of the device is connected with the grounding point through the protection line.

[0057] IN system is an ungrounded or high impedance grounded system, I represents that the neutral point of the power supply is ungrounded or high impedance grounded, and T represents that the exposed conductive part of the device is directly grounded. The exposed conductive part of all devices is directly grounded through the respective protection line PE, in order to electrically connect the photovoltaic off-grid system.

[0058] TT system is an independent grounding protection system, in a three-phase four-wire system with direct grounding of the power supply neutral point, the exposed conductive part of all devices is directly grounded through the respective protection line PE, in order to electrically connect the photovoltaic off-grid system.

[0059] In an embodiment, TN system 121 includes TN-S system 1211, TN-C system 1212 and TN-C-S system 1213. Among them, TN-S system: in this system, the protection line and the neutral line are separated, because the PE line does not pass through the load current normally, the metal shell of the electrical equipment connected with the PE line is not electrified in normal operation, which is suitable for the power supply of data processing and precision electronic instrument equipment. Using TN-S power supply is convenient and safe. TN-C system: in this system, the protection line and the neutral line are combined into a PEN line, when a ground short circuit fault occurs, the fault current is large, which can make the current protection device act and cut off the power supply. TN-C-S system: a widely used power distribution system, whether in industrial and mining enterprises or in civil buildings, its line structure is simple, and can ensure a certain safety level.

[0060] Monitoring system 103: for monitoring power supply system 102 and photovoltaic off-grid system 104, in order to prevent major accidents caused by faults in system operation. Monitoring system 103 includes fire fighting system 131 and SMS (Smart Monitoring System, intelligent substation monitoring system) system 132.

[0061] In one embodiment, the fire-fighting system 131 comprises a smoke detection device 1311, a temperature detection device 1312, a fire extinguishing system 1313, a smoke exhaust system 1314, and a harmful gas detection device 1315. The smoke detection device is used to detect the interior of the power supply system 102 and the photovoltaic off-grid system 104, and an alarm signal is sent when the smoke concentration is greater than a first preset threshold. The temperature detection device 1312 is used to detect the interior of the power supply system 102 and the photovoltaic off-grid system 104, and an alarm signal is sent when the temperature is greater than a second preset threshold. The fire extinguishing system 1313 is used to release fire extinguishing agent after receiving the alarm signal to extinguish the fire. The smoke exhaust system 1314 is used to exhaust smoke and toxic gas outside after receiving the alarm signal to create favorable conditions for personnel evacuation and fire rescue. The harmful gas detection device 1315 is used to continuously monitor the harmful gas concentration in the interior of the power supply system 102 and the photovoltaic off-grid system 104 after the treatment is completed, and the alarm signal is removed and the power supply system of the booster station is restored when the harmful gas concentration is less than a third preset threshold.

[0062] In one embodiment, the fire-fighting system 131 further comprises a water fire-fighting system 1316 and a power cut-off system 1317. The water fire-fighting system 1316 is arranged in the interior of the power supply system 102 and the photovoltaic off-grid system 104, and is used to perform water fire-fighting treatment after receiving the alarm signal. The power cut-off system 1317 is used to cut off the power supply of the power supply system 102 and the photovoltaic off-grid system 104 after receiving the alarm signal.

[0063] In one embodiment, the SMS system comprises a load monitoring module 1321, a light power monitoring module 1322, and a temperature field monitoring module 1323. The load monitoring module 1321 monitors the load of the internal equipment of the power supply system 102 and the photovoltaic off-grid system 104 to prevent the equipment from being damaged due to overload during system operation. The light power monitoring module 1322 provides data basis for the design and application of the solar cell panel of the photovoltaic off-grid system 104 by measuring the light power, so that the best power output and load matching are achieved. The temperature field monitoring module 1323 monitors the temperature of the solar cell panel through a temperature instrument, so that the temperature of the solar cell panel is maintained below a fourth preset threshold. The temperature of the battery pack is monitored through a temperature instrument, and according to the characteristics of the photovoltaic cell, when the temperature is too high, the voltage of the battery will decrease, thereby affecting the power generation efficiency of the photovoltaic power station. By monitoring the temperature of the battery pack through the temperature instrument, measures can be taken in real time to reduce the temperature of the battery, thereby improving the power generation efficiency of the photovoltaic power station.

[0064] In one embodiment of the present application, the calculation formula of the light power in the SMS system is:

[0065] GL = (Dir θa x S x SL) x ZL

[0066] In the formula, GL is the solar light power, Dir θa is the total amount of direct sunlight of the solar panel, S is the sunlight area of the solar panel, SL is the sunlight area utilization coefficient, and ZL is the component conversion efficiency.

[0067] In an embodiment of the present application, the calculation formula for monitoring the temperature coefficient of the solar panel in the SMS system is:

[0068]

[0069] In the formula, WD is the temperature coefficient, U is the rated voltage, T2 is the corresponding high temperature, T1 is the corresponding low temperature, represents the linear voltage under T2 environment, represents the linear voltage under T1 environment.

[0070] The photovoltaic off-grid system 104 is used for converting the solar energy collected by the solar panel into electric energy and storing the electric energy by the energy storage battery. The photovoltaic off-grid system 104 includes a solar panel 141, a charge-discharge controller 142, an energy storage battery 143, and an inverter 144. The solar panel 141 is used for converting light energy into electric energy; the charge-discharge controller 142 is used for protecting the battery from overcharging and overdischarging; the energy storage battery 143 is used for storing electric energy for use in the absence of sunlight or at night; and the inverter 144 is used for converting direct current into alternating current.

[0071] The energy storage battery 143 is a modular energy storage design, each energy storage battery 143 includes an independent battery pack and a charge-discharge controller; the solar panel 141 is provided with a heat management system, the heat management system adopts liquid cooling, air cooling, and phase change material cooling technology, and combines intelligent temperature control technology to adjust the temperature in real time.

[0072] In an embodiment of the present application, the hybrid power supply system further includes an intelligent dispatching system, the power supply system adopts distributed power grid and micro-grid technology, small power supply points and energy storage devices are constructed in multiple villages, and the power complementation and sharing between the villages are realized through the intelligent dispatching system.

[0073] In an embodiment, the intelligent dispatching system includes a data acquisition layer, a communication transmission layer, a data processing layer, an application decision layer, and a man-machine interaction layer.

[0074] The data acquisition layer: real-time acquisition of operation data and equipment state information of the power supply system, the power supply system, the monitoring system and the photovoltaic off-grid system through the smart meter; the communication transmission layer: using optical fiber communication to safely and reliably transmit the collected operation data and equipment state information to the dispatch center; the data processing layer: cleaning, storing and analyzing the collected operation data and equipment state information, extracting key information, and providing support for dispatch decision; the application decision layer: based on the key information provided by the data processing layer, using intelligent algorithms and expert systems to realize the functions of real-time monitoring, fault warning and dispatch decision of the power supply system, the power supply system, the monitoring system and the photovoltaic off-grid system.

[0075] The man-machine interaction layer: provides an intuitive and friendly operation interface for the dispatch personnel to monitor the operation state of the power supply system, the power supply system, the monitoring system and the photovoltaic off-grid system, and triggers the dispatch instruction.

[0076] The application embodiment also provides a control method of the hybrid power supply system, which is applied to the hybrid power supply system of the above-mentioned embodiment, as shown in the figure, the method comprises the following steps: Figure 2

[0077] Step 201: power supply to the power supply system, the monitoring system and the photovoltaic off-grid system by the power supply system.

[0078] Step 202: generating electric energy based on the power supply system by the power supply system, and delivering the electric energy to the monitoring system and the photovoltaic off-grid system.

[0079] Step 203: monitoring the power supply system and the photovoltaic off-grid system by the monitoring system.

[0080] Step 204: converting solar energy collected by the solar panel into electric energy by the photovoltaic off-grid system, and storing the electric energy by the energy storage battery.

[0081] In this embodiment, the connection power supply: electrically connecting the power supply with the power supply system, the monitoring system and the photovoltaic off-grid system, providing power to the power supply system, the monitoring system and the photovoltaic off-grid system, and guaranteeing the daily operation and maintenance of the equipment.

[0082] The power supply system operation: generating electric energy and supplying and delivering the electric energy to the monitoring system and the photovoltaic off-grid system by the power supply system and the power transmission and distribution system, and selecting any one of the TN system, the IN system and the TT system according to the situation.

[0083] The monitoring system operation: monitoring the power supply system and the photovoltaic off-grid system, wherein the SMS system is used to monitor the inside of the power supply system and the photovoltaic off-grid system.

[0084] ​Fire fighting system operation: when the power supply system and the photovoltaic off-grid system have problems, the power supply system and the photovoltaic off-grid system are treated by the fire fighting system.

[0085] Photovoltaic off-grid system operation: the light energy is converted into electric energy by the solar cell panel, and the converted electric energy is stored in the energy storage battery, and at the same time, the charge and discharge controller is used to protect the battery from overcharging or overdischarging.

[0086] Solar cell panel monitoring: the load monitoring, light power monitoring and temperature field monitoring provided by the SMS system are used to monitor the load of the solar cell panel, the solar light power and the temperature coefficient of the solar cell panel.

[0087] The application provides a booster station photovoltaic off-grid, state grid and energy storage hybrid power supply system and method, which has the following advantages:

[0088] (1) The power supply is electrically connected to the power supply system, the monitoring system and the photovoltaic off-grid system by the power supply, and provides electric energy to the power supply system, the monitoring system and the photovoltaic off-grid system, which is used to ensure the daily operation and maintenance of the equipment.

[0089] (2) The light energy is converted into electric energy by the solar cell panel, and the converted electric energy is stored in the energy storage battery, and at the same time, the charge and discharge controller is used to protect the battery from overcharging or overdischarging, and the power supply system is electrically connected to the power supply system, and the electric energy is transmitted to the outside through the power supply system.

[0090] (3) The power supply system and the photovoltaic off-grid system are monitored by the monitoring system, and when problems occur, the power supply system and the photovoltaic off-grid system are treated by the fire fighting system, and at the same time, the load monitoring, light power monitoring and temperature field monitoring are used to monitor the load of the solar cell panel, the solar light power and the temperature coefficient of the solar cell panel, and by setting the monitoring system for the power supply system, the stability of the power supply quality of the power supply system can be improved.

[0091] (4) In the remote mountainous area, distributed power grid and microgrid technology are used, small power supply points and energy storage equipment are built in multiple villages, and through the intelligent dispatching system, the power complementation and sharing between villages are realized, the electricity problem of the residents in the mountainous area is solved, and the dependence on diesel generators is reduced.

[0092] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element. Furthermore, it is to be understood that the method and apparatus of the present application can be carried out by someone other than the person named in the independent claims, and that the scope of the independent claims is not limited to the person named in the independent claims. In addition, it should be noted that the scope of the method and apparatus of the present application is not limited to performing the functions in the order shown or discussed, but can also include performing the functions in a substantially simultaneous manner or in a reverse order, for example, the described method can be performed in an order different from that described, and various steps can be added, omitted, or combined. In addition, features described with reference to certain examples can be combined in other examples.

[0093] The embodiments of the present application are described above with reference to the accompanying drawings, but the present application is not limited to the specific embodiments described above, which are merely illustrative and not restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims.

Claims

1. A hybrid power supply system, characterized in that, include: Power supply system, power supply system, monitoring system, and photovoltaic grid-connected and off-grid systems; Among them, the power supply system is used to supply power to the power supply system, monitoring system, and photovoltaic off-grid and grid-connected systems; Power supply system: used to generate electrical energy based on the power supply system and transmit the electrical energy to the monitoring system and photovoltaic off-grid and grid-connected systems; Monitoring system: used to monitor the power supply system and photovoltaic off-grid and grid-connected systems. The monitoring system includes a fire protection system and an SMS system. The fire protection system includes smoke detection equipment, temperature detection equipment, fire extinguishing system, smoke exhaust system and harmful gas detection equipment. The SMS system includes a load monitoring module, a photovoltaic power monitoring module and a temperature field monitoring module. Photovoltaic off-grid and grid-connected systems: These systems convert solar energy collected by solar panels into electrical energy and store it through energy storage batteries.

2. The hybrid power supply system according to claim 1, characterized in that, The smoke detection device is used to detect the internal components of the power supply system and the photovoltaic grid-connected system, and to issue an alarm signal when the smoke concentration exceeds a first preset threshold. The temperature detection device is used to detect the internal components of the power supply system and the photovoltaic grid-connected system, and to issue an alarm signal when the temperature exceeds a second preset threshold. Fire extinguishing system: Used to release extinguishing agent upon receiving an alarm signal; Smoke exhaust system: Used to exhaust smoke and toxic gases after receiving an alarm signal; Hazardous gas detection equipment: used to continuously monitor the concentration of hazardous gases inside the power supply system and photovoltaic grid-connected and off-grid systems, and to release the alarm signal when the concentration of hazardous gases is less than the third preset threshold.

3. The hybrid power supply system according to claim 1, characterized in that, The fire protection system also includes a water fire protection system and a power cut-off system; The water fire suppression system is installed inside the power supply system and the photovoltaic grid-connected system. The water fire suppression system is used to carry out water fire suppression after receiving an alarm signal. The power cut-off system is used to cut off the power supply to the power supply system and the photovoltaic grid-connected system after receiving an alarm signal.

4. The hybrid power supply system according to claim 1, characterized in that, Load monitoring module: Monitors the load of equipment within the power supply system and photovoltaic grid-connected / off-grid systems; Photovoltaic power monitoring module: By measuring photovoltaic power, it provides data for the design and application of solar panels in the photovoltaic off-grid system; Temperature field monitoring module: Monitors the temperature of the solar panel using a temperature meter to keep the temperature of the solar panel below a fourth preset threshold.

5. The hybrid power supply system according to claim 4, characterized in that, The formula for calculating optical power in the SMS system is as follows: GL=(Dirθα×S×SL)×ZL In the formula, GL is the solar power, Dirθα is the total amount of direct solar radiation to the solar panel, S is the solar area of ​​the solar panel, SL is the solar area utilization coefficient, and ZL is the module conversion efficiency.

6. The hybrid power supply system according to claim 4, characterized in that, The formula for calculating the temperature coefficient of the solar panel monitored in the SMS system is as follows: In the formula, WD is the temperature coefficient, U is the rated voltage, T2 is the corresponding high temperature, and T1 is the corresponding low temperature. This represents the line voltage under environment T2. This represents the line voltage under environment T1.

7. The hybrid power supply system according to claim 1, characterized in that, The power supply system includes TN system, IT system and TT system; The TN system includes the TN-S system, the TN-C system, and the TN-CS system.

8. The hybrid power supply system according to claim 1, characterized in that, The photovoltaic off-grid system includes solar panels, a charge / discharge controller, an energy storage battery, and an inverter. The energy storage battery is a modular energy storage design, and each energy storage battery includes an independent battery pack and a charge / discharge controller; the solar panel is equipped with a thermal management system, which adopts liquid cooling, air cooling and phase change material cooling technology, combined with intelligent temperature control technology to adjust the temperature in real time.

9. The hybrid power supply system according to claim 1, characterized in that, Also includes: The intelligent dispatch system comprises a data acquisition layer, a communication transmission layer, a data processing layer, an application decision-making layer, and a human-computer interaction layer. Among them, the data acquisition layer: collects real-time operating data and equipment status information of the power system, power supply system, monitoring system and photovoltaic off-grid system through smart meters; Communication transmission layer: Utilizes fiber optic communication to transmit the collected operational data and equipment status information to the dispatch center; Data processing layer: Cleans, stores, and analyzes the collected operational data and equipment status information, and extracts key information; Application Decision Layer: Based on the key information provided by the data processing layer, it uses intelligent algorithms and expert systems to realize the functions of real-time monitoring, fault early warning, and scheduling decision-making for power systems, power supply systems, monitoring systems, and photovoltaic grid-connected and off-grid systems; Human-machine interaction layer: Provides an operating interface for dispatchers to monitor the operating status of the power system, power supply system, monitoring system, and photovoltaic off-grid and on-grid systems, and to trigger dispatch commands.

10. A control method for a hybrid power supply system, characterized in that, Applied to a hybrid power supply system as described in any one of claims 1 to 9, the method comprises: The power supply system supplies power to the power supply system, monitoring system, and photovoltaic grid-connected and off-grid systems. Through the power supply system, electrical energy is generated based on the power supply system and transmitted to the monitoring system and the photovoltaic off-grid system; The power supply system and photovoltaic off-grid and grid-connected systems are monitored through a monitoring system; The solar energy collected by solar panels is converted into electrical energy through a photovoltaic off-grid system, and the electrical energy is stored in energy storage batteries.

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