Power supply system

Abstract

The utility model provides a power supply system, comprising a grid-connected module used for being connected to a power grid and a load; the off-grid module is used for being connected to a load; the power module is connected to the off-grid module, and the power module is used for generating and storing electric energy; the controller is in communication connection with the grid-connected module, the off-grid module and the power module, and the controller is used for sending control signals to the grid-connected module, the off-grid module and the power module so as to control operation of the grid-connected module, the off-grid module and the power module. According to the power supply system provided by the utility model, when the electric energy provided by the power grid is abnormal, the off-grid module is controlled to switch to the power module to supply power to the load, the response speed of the switching process is fast, the user experience is ensured, and the loss caused by overlong power-off time of the load is also avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power, and particularly to a power supply system. Background Art

[0002] In the related art, a backup power supply system is used as a backup power source to supply power to a user's room in the event of an abnormality in the power grid. That is, when the power grid fails to supply power normally, the current power supply system can be switched from the power grid to the backup power supply system. However, in the related art, a mechanical double power switch is usually used to realize the switching between the backup power supply system and the power grid. This switching method has a slow response speed and cannot achieve fast switching, resulting in a poor user experience. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art.

[0004] To this end, the utility model provides a power supply system.

[0005] The utility model provides a power supply system, including: a grid-connected module for connecting to the power grid and a load; an off-grid module for connecting to the load; a power module connected to the off-grid module for generating and storing electric energy; a controller communicatively connected to the grid-connected module, the off-grid module and the power module, and the controller for sending control signals to the grid-connected module, the off-grid module and the power module to control the operation of the grid-connected module, the off-grid module and the power module.

[0006] The power supply system provided by the utility model includes a grid-connected module, an off-grid module and a power module. Among them, the grid-connected module is used to connect to the power grid and the load, so as to supply power to the load through the power grid. The off-grid module is used to connect to the power module and the load, so that the load can be powered by the power module.

[0007] It can be understood that the power grid is a public and paid power supply system. Through the grid connection module, it is possible to purchase electric energy from the public power supply system, so as to supply power to the loads in the user's room. Correspondingly, the power module is a backup power supply system arranged by the user for the room. The power module can be used to generate and store electric energy. When the power grid fails to supply power to the loads, the user can use the power module to supply power to the loads in the room. Among them, the loads can include common loads in the user's room, such as televisions, general lighting, kitchen appliances, charging piles, heat pumps, consumer appliances, and entertainment facilities, etc. The loads can also include critical loads in the user's room, that is, loads that need to keep running for a long time, such as refrigerators, security door locks, fish tanks, wine cellars, automatic curtains, mobile sockets, etc. When the power grid fails, the critical loads are powered by the power module, so as to ensure that the critical loads can operate continuously and stably, and avoid losses caused by power outages.

[0008] Furthermore, the power supply system further includes a controller. The controller is communicatively connected to the grid connection module, the off-grid module, and the power module. The controller is used to send control signals to the grid connection module, the off-grid module, and the power module to control the operation of the grid connection module, the off-grid module, and the power module. Specifically, the controller can detect the voltage input into the grid connection module, that is, the voltage provided by the power grid. When the voltage provided by the power grid is abnormal, the controller can control the off-grid module to operate, so that the electric energy provided by the power module can be directly supplied to the loads through the off-grid module, that is, the electric energy of the power module is supplied to the critical loads, ensuring that the critical loads will not lose power and avoiding losses.

[0009] It can be understood that the power module is connected to the loads through the off-grid module. Through the controller, it is possible to directly control the operation of the off-grid module through control signals to transmit the electric energy of the power module to the loads. Compared with the method of using a mechanical double power switch to switch between the power grid and the backup power supply system in the related art, it can effectively improve the response speed, ensure the user experience, and also avoid losses caused by the load being powered off for too long.

[0010] Furthermore, when the controller controls the off-grid module to operate so that the electric energy of the power module is transmitted to the loads, it can also control the grid connection module so that the loads are disconnected from the power grid, thus avoiding the influence of abnormal power grid power supply on the loads.

[0011] Exemplarily, during the process of the power grid supplying electrical energy to the load, the controller monitors the voltage value output by the power grid in real time, determines whether the voltage value output by the power grid is abnormal. If the controller monitors that the voltage value output by the power grid is abnormal, it immediately controls the grid-connected module to disconnect the load from the power grid. At the same time, it controls the off-grid module to deliver the electrical energy of the power module to the load to ensure that the load remains powered and avoid losses.

[0012] For the power supply system provided by the present utility model, by controlling the off-grid module through the controller, when the voltage value provided by the power grid is abnormal, the controller controls the off-grid module to operate so that the electrical energy of the power module can be directly transmitted to the load, thereby realizing a rapid switch between power grid power supply and power module power supply. Compared with the switching method using a mechanical double power switch in the related art, switching through the control signal provided by the controller can effectively improve the response speed during the switching process, ensure the user experience, and also avoid losses caused by too long a power-off time of the load. At the same time, by controlling the grid-connected module through the controller, when the voltage value provided by the power grid is abnormal, the load is disconnected from the power grid to avoid the influence of the abnormal voltage provided by the power grid on the load.

[0013] In addition, for the power supply system according to the above technical solution provided by the present utility model, it may also have the following additional technical features:

[0014] In some technical solutions, optionally, the power module includes: a power generation device connected to the load and the controller; an energy storage device connected to the load, the power generation device, and the controller; wherein, the energy storage device is used to store the electrical energy generated by the power generation device.

[0015] In this technical solution, the power module may include a power generation device and an energy storage device. Among them, both the power generation device and the energy storage device can be connected to the load and the controller. When the controller detects that the voltage value provided by the power grid is abnormal, the controller can control the off-grid module to directly supply the electrical energy generated by the power generation device to the load, or supply the electrical energy stored in the energy storage device to the load.

[0016] Specifically, the controller can determine whether to supply power to the load through the power generation device or through the energy storage device according to the amount of electric energy stored in the energy storage device. For example, when the controller determines that the amount of electric energy stored in the energy storage device is relatively large, the electric energy stored in the energy storage device can be directly supplied to the load. On the contrary, when the controller determines that the amount of electric energy stored in the energy storage device is relatively small, in order to ensure continuous and stable power supply to the load, the power generation device can generate electricity and supply the generated electric energy to the load. Specifically, the controller can first obtain the electric energy stored in the energy storage device. When the electric energy stored in the energy storage device is greater than the minimum threshold, the electric energy in the energy storage device is supplied to the load. On the contrary, when the electric energy stored in the energy storage device is less than or equal to the minimum threshold, the power generation device supplies electric energy to the load.

[0017] Furthermore, the energy storage device is also connected to the power generation device, so that the electric energy generated by the power generation device can be transmitted to the energy storage device, and the electric energy generated by the power generation device can be stored through the energy storage device. Specifically, when the electric energy provided by the power grid is normal, the operation of the power generation device can be controlled to store the electric energy generated by the power generation device, so as to ensure the power supply demand of the load when the electric energy provided by the power grid is abnormal.

[0018] In some technical solutions, optionally, the power generation device includes: a photovoltaic power generation device, connected to the load and the controller; and a generator, connected to the load and the controller.

[0019] In this technical solution, the power generation device can include a photovoltaic power generation device and a generator. It can be understood that by generating electricity through the photovoltaic power generation device, the sunlight during the day can be utilized to convert light energy into electric energy, which can effectively reduce the power generation cost, and the power generation process is more environmentally friendly, reducing the pollution generated during the power generation process.

[0020] In addition, by generating electricity through the generator, the electric energy required by the load can be ensured when the photovoltaic power generation device cannot operate normally, such as at night or when the sunlight intensity is insufficient during the day.

[0021] In some technical solutions, optionally, the photovoltaic power generation device includes: photovoltaic panels; an inverter, connected to the photovoltaic panels and used to convert the electric energy generated by the photovoltaic panels; and an optimizer, connected to the inverter and the controller and used to control the operation of the inverter.

[0022] In this technical solution, the photovoltaic power generation device can include photovoltaic panels. Specifically, the number of photovoltaic panels can be multiple, and the photovoltaic panels can be arranged above the building to ensure sufficient sunlight. Through the photovoltaic panels, the conversion of light energy into electric energy can be realized, and the power generation process can be achieved.

[0023] Further, the photovoltaic power generation device further includes an inverter. The inverter is connected to the photovoltaic panel. Through the inverter, the electric energy generated by the photovoltaic panel can be converted, and parameters such as the voltage value and current value of the electric energy output by the photovoltaic power generation device can be controlled.

[0024] Further, the photovoltaic power generation device further includes an optimizer. The optimizer is connected to the inverter. Through the optimizer, the operation of the inverter can be controlled, that is, the operation parameters of the inverter can be controlled, so as to control the parameters of the electric energy output by the photovoltaic power generation device, such as voltage value, current value, and frequency, etc., thereby ensuring a stable and continuous supply of electric energy to the load and ensuring the stable operation of the load.

[0025] At the same time, the optimizer is also connected to the controller. Through the controller, the operation of the optimizer can be controlled according to the specific parameters of the load, and then the operation of the inverter can be controlled through the optimizer, so as to ensure that the parameters of the electric energy output by the photovoltaic power generation device to the load can meet the operation requirements of the load.

[0026] In some technical solutions, optionally, the power supply system further includes: a power line carrier communication device. The controller and the optimizer are communicatively connected through the power line carrier communication device.

[0027] In this technical solution, the power supply system may further include a power line carrier communication device. Through the power line carrier communication device, data transmission between the controller and the optimizer can be achieved.

[0028] Specifically, the optimizer and the inverter can be connected through a power line to achieve the transmission of electric energy. The power line carrier communication device may include a power line carrier communication chip and a magnetic ring. Among them, the magnetic ring is sleeved on the power line and is connected to the power line carrier communication chip. The controller can generate a transmission signal through the power line carrier communication chip and transmit it to the magnetic ring. When the transmission signal is transmitted to the magnetic ring, the magnetic core of the magnetic ring changes, so as to superimpose the transmission signal on the power line, and then transmit the transmission signal to the optimizer through the power line to achieve signal transmission between the optimizer and the controller.

[0029] In some technical solutions, optionally, the off-grid module includes: a first switch unit. The first switch unit is connected to the load and the power module; a first sampling unit. The first sampling unit is connected to the inverter and is used to collect the current value and voltage value output by the power module; wherein, the controller is used to control the operation of the power unit according to the current value and voltage value collected by the first sampling unit.

[0030] In this technical solution, the off-grid module may include a first switch unit, which is used to control the on / off between the power module and the load. That is, when the controller detects an abnormality in the electric energy provided by the power grid, the controller can control the first switch unit to turn on, so as to connect the power module and the load, and realize power supply to the load through the power module.

[0031] Specifically, the first switch unit may include a relay. Compared with the mechanical dual-power switch in the related art, the relay has a faster response speed and can achieve fast switching, thus avoiding losses caused by too long a power-off time of the load. In addition, the first switch unit may also include switch devices such as contactors and circuit breakers.

[0032] Furthermore, the off-grid module may further include a first sampling unit, which is connected to the inverter to sample the electric energy output by the inverter. Specifically, the voltage value and current value of the electric energy output by the inverter can be collected. At the same time, the first sampling unit is also connected to the controller, so that the controller can receive the voltage value and current value collected by the first sampling unit, and then the controller can control the operation of the inverter through the optimizer according to the voltage value and current value of the electric energy output by the inverter, ensure the quality of the electric energy output by the inverter, and then ensure the stable operation of the load.

[0033] In some technical solutions, optionally, the off-grid module further includes: a second switch unit, connected to the generator, the first switch unit and the controller; a second sampling unit, connected to the generator and the controller, and used to collect the voltage value output by the generator.

[0034] In this technical solution, the generator may include a generator, specifically a diesel generator. Through the operation of the generator, the generation of electric energy can be realized.

[0035] Furthermore, the off-grid module may further include a second switch unit and a second sampling unit. Among them, the second switch unit is connected to the generator and the first switch unit. By controlling the first switch unit and the second switch unit through the controller, the electric energy generated by the generator can be transmitted to the load. At the same time, through the second sampling unit, the voltage value and current value of the electric energy generated by the generator can be sampled, so as to determine whether the generator can provide continuous and stable electric energy for the load to ensure the normal operation of the load.

[0036] In some technical solutions, optionally, the off-grid module further includes: an emergency detection device, connected to the load and the controller, and used to detect the current value flowing into the load; an emergency switch, connected to the load and the controller; wherein, the controller is used to control the emergency switch to conduct or turn off according to the current value detected by the emergency detection device.

[0037] In this technical solution, the off-grid module may further include an emergency detection device and an emergency switch. The emergency detection device is connected to the load and the controller, so as to detect the current value input to the load and provide it to the controller. The controller can control the emergency switch to turn off when detecting that the current value input to the load is abnormal, so as to avoid the abnormal current from affecting the operation of the load.

[0038] In some technical solutions, optionally, the grid-connected module includes: a third switch unit, which is connected to the power grid and the controller; a third sampling unit, which is connected to the power grid and the controller, and the third sampling unit is used to collect the parameter values of the electric energy provided by the power grid; wherein, the controller is used to control the third switch unit to disconnect the load from the power grid when the parameter values of the electric energy provided by the power grid collected by the third sampling unit are abnormal.

[0039] In this technical solution, the grid-connected module includes a third switch unit and a third sampling unit. Among them, the third switch unit is connected to the power grid and the controller, and the controller can control the third switch unit to connect or disconnect the load from the power grid.

[0040] Since the third sampling unit is connected to the power grid and the controller, the third sampling unit can sample the voltage value of the electric energy output by the power grid and provide it to the controller. The controller can control the third switch unit to disconnect when detecting that the voltage value of the electric energy provided by the power grid is abnormal, so as to disconnect the load from the power grid and avoid the abnormal electric energy provided by the power grid from affecting the load.

[0041] In some technical solutions, optionally, the number of loads is multiple, and the multiple loads are connected to the controller; wherein, the controller is further used to allocate power to the multiple loads according to the voltage value output by the power module.

[0042] In this technical solution, the number of loads can be multiple, and the multiple loads are all connected to the controller. The controller can allocate power to the multiple loads according to the voltage value output by the power module.

[0043] Exemplarily, the loads can include loads such as refrigerators, safety door locks, fish tanks, wine cellars, automatic curtains, and mobile sockets. When the voltage value output by the power module is low, in order to minimize the loss caused by the loads not being able to obtain normal power supply, the controller can obtain one or several relatively important loads among the multiple loads for power supply. For example, it can select to supply power to the safety door lock to ensure the safety of the room, and it can select to supply power to the refrigerator to avoid the food in the refrigerator from deteriorating. In addition, when the voltage value output by the power module is high, the controller can control the off-grid module to supply power to all loads.

[0044] In some technical solutions, optionally, the power supply system further includes: a host computer communicatively connected to the controller; wherein, the controller is further configured to control the grid-connected module and the off-grid module to operate according to the control instructions issued by the host computer.

[0045] In this technical solution, the power supply system may further include a host computer, and the host computer is communicatively connected to the controller. By setting up the host computer, the user can use the host computer to control the controller, thereby achieving the control of the grid-connected module and the off-grid module, and further meeting the user's electricity demand.

[0046] Specifically, the host computer may include a personal computer, a mobile phone, a tablet computer, etc., and may specifically be the corresponding application programs in the personal computer, the mobile phone, and the tablet computer. The host computer and the controller may be communicatively connected through a data cable or through a wireless network.

[0047] In some technical solutions, optionally, the power supply system further includes: an environment detection device connected to the controller for detecting environment parameters; wherein, the controller is further configured to control the grid-connected module and the off-grid module to operate according to the environment parameters.

[0048] In this technical solution, the power supply system may further include an environment detection device for detecting the environment parameters of the environment where the user is located, and the environment detection device is connected to the controller, so that the controller can receive the environment parameters detected by the environment detection device, and then control the grid-connected module and the off-grid module to operate according to the environment parameters.

[0049] Specifically, the environment detection device may detect the weather condition of the environment where the user is located, and the controller combines the weather condition and the user's electricity consumption to control the grid-connected module and the off-grid module. Specifically, when the environment detection device detects good weather and sufficient sunlight, the controller combines the weather condition and the user's electricity consumption, and can then control the grid-connected module to disconnect the load from the power grid, and control the off-grid module so that the power module can supply power to the load, thereby reducing the purchase of electric energy from the power grid.

[0050] The additional aspects and advantages of the present utility model will become apparent in the following description section, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0052] Figure 1 shows a structural block diagram of the power supply system provided by an embodiment of the present utility model;

[0053] Figure 2 The structural schematic diagram of the power supply system provided by the embodiment of the present utility model is shown.

[0054] Wherein, Figure 1 and Figure 2 The corresponding relationship between the reference numerals and the component names in the figure is as follows:

[0055] 100 power supply system, 102 grid connection module, 104 off-grid module, 106 power module, 108 controller, 110 power generation equipment, 112 energy storage equipment, 114 photovoltaic power generation equipment, 116 generator, 118 photovoltaic panel, 120 inverter, 122 optimizer, 124 power line carrier communication device, 126 first switch unit, 128 first sampling unit, 130 second switch unit, 132 second sampling unit, 134 emergency detection device, 136 emergency switch, 138 third switch unit, 140 third sampling unit, 142 upper computer, 144 environment detection device, 146 DC converter, 148 transmission bus, 150 power distribution cabinet, 200 power grid, 300 load. Specific embodiments

[0056] In order to more clearly understand the above objects, features and advantages of the present utility model, the present utility model will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0057] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present utility model is not limited by the specific embodiments disclosed below.

[0058] Next, refer to Figure 1 and Figure 2 to describe the power supply system provided according to some embodiments of the present utility model.

[0059] The present utility model provides a power supply system 100, as shown in Figure 1 and Figure 2As shown, the power supply system 100 includes: a grid-connected module 102 for connecting to a power grid 200 and a load 300; an off-grid module 104 for connecting to the load 300; a power module 106 connected to the off-grid module 104 for generating and storing electrical energy; and a controller 108 communicatively connected to the grid-connected module 102, the off-grid module 104, and the power module 106, and the controller 108 is configured to send control signals to the grid-connected module 102, the off-grid module 104, and the power module 106 to control the operation of the grid-connected module 102, the off-grid module 104, and the power module 106.

[0060] The power supply system 100 provided by the present utility model includes a grid-connected module 102, an off-grid module 104, and a power module 106. Among them, the grid-connected module 102 is used to connect to the power grid 200 and the load 300, so as to supply power to the load 300 through the power grid 200. The off-grid module 104 is used to connect to the power module 106 and the load 300, so that power can be supplied to the load 300 through the power module 106.

[0061] It can be understood that the power grid 200 is a public and paid power supply system 100. Through the grid-connected module 102, it is possible to purchase electrical energy from the public power supply system 100 to supply power to the load 300 in the user's room. Correspondingly, the power module 106 is a backup power supply system 100 arranged by the user for the room. The power module 106 can be used to generate and store electrical energy. In the case where the power grid 200 fails to supply power to the load 300, the user can use the power module 106 to supply power to the load 300 in the room. Among them, the load 300 can include common loads in the user's room, such as televisions, general lighting, kitchen appliances, charging piles, heat pumps, consumer appliances, and entertainment facilities. The load 300 can also include critical loads in the user's room, that is, loads 300 that need to keep running for a long time, such as refrigerators, security door locks, fish tanks, wine cellars, automatic curtains, and mobile sockets. In the case where the power grid 200 fails, the power module 106 supplies power to the critical load 300, so as to ensure that the critical load 300 can continue to operate stably and avoid losses caused by power outages.

[0062] Further, the power supply system 100 further includes a controller 108. The controller 108 is communicatively connected to the grid-connected module 102, the off-grid module 104, and the power module 106. The controller 108 is configured to send control signals to the grid-connected module 102, the off-grid module 104, and the power module 106 to control the operation of the grid-connected module 102, the off-grid module 104, and the power module 106. Specifically, the controller 108 can detect the voltage input into the grid-connected module 102, that is, the voltage provided by the power grid 200. In the case where the voltage provided by the power grid 200 is abnormal, the controller 108 can control the off-grid module 104 to operate, so that the electric energy provided by the power module 106 can be directly supplied to the load 300 through the off-grid module 104, that is, the electric energy of the power module 106 is supplied to the critical load 300, ensuring that the critical load 300 will not lose power and avoiding losses.

[0063] It can be understood that the power module 106 is connected to the load 300 through the off-grid module 104. Through the controller 108, it is possible to directly control the operation of the off-grid module 104 through a control signal to transmit the electric energy of the power module 106 to the load 300. Compared with the related art that uses a mechanical double power switch to switch between the power grid 200 and the backup power supply system 100, the response speed can be effectively improved, the user experience can be guaranteed, and the loss caused by the load 300 being powered off for too long can also be avoided.

[0064] Further, when the controller 108 controls the off-grid module 104 to operate so that the electric energy of the power module 106 is transmitted to the load 300, it can also control the grid-connected module 102 to disconnect the load 300 from the power grid 200, thereby avoiding the impact of abnormal power grid 200 power supply on the load 300.

[0065] Exemplarily, during the process of the power grid 200 supplying electric energy to the load 300, the controller 108 monitors the voltage value output by the power grid 200 in real time and determines whether the voltage value output by the power grid 200 is abnormal. If the controller 108 monitors that the voltage value output by the power grid 200 is abnormal, it immediately controls the grid-connected module 102 to disconnect the load 300 from the power grid 200. At the same time, it controls the off-grid module 104 to transmit the electric energy of the power module 106 to the load 300 to ensure that the load 300 remains powered and avoid losses.

[0066] The power supply system 100 provided by the present utility model controls the off-grid module 104 through the controller 108. When the voltage value provided by the power grid 200 is abnormal, the controller 108 controls the off-grid module 104 to operate, so that the electric energy of the power module 106 can be directly transmitted to the load 300, realizing a rapid switch between the power supply of the power grid 200 and the power supply of the power module 106. Compared with the switching method using a mechanical dual power switch in the related art, switching through the control signal provided by the controller 108 can effectively improve the response speed during the switching process, ensure the user experience, and also avoid losses caused by the load 300 being powered off for too long. At the same time, the controller 108 controls the grid-connected module 102 to disconnect the load 300 from the power grid 200 when the voltage value provided by the power grid 200 is abnormal, avoiding the abnormal voltage provided by the power grid 200 from affecting the load 300.

[0067] In some embodiments, optionally, as Figure 1 and Figure 2 shown, the power module 106 includes: a power generation device 110 connected to the load 300 and the controller 108; an energy storage device 112 connected to the load 300, the power generation device 110 and the controller 108; wherein, the energy storage device 112 is used to store the electric energy generated by the power generation device 110.

[0068] In this embodiment, the power module 106 may include a power generation device 110 and an energy storage device 112. Among them, both the power generation device 110 and the energy storage device 112 can be connected to the load 300 and the controller 108. When the controller 108 detects that the voltage value provided by the power grid 200 is abnormal, the controller 108 can control the off-grid module 104 to directly supply the electric energy generated by the power generation device 110 to the load 300, or supply the electric energy stored in the energy storage device 112 to the load 300.

[0069] Specifically, the controller 108 can determine whether to supply power to the load 300 through the power generation device 110 or through the energy storage device 112 according to the amount of electrical energy stored in the energy storage device 112. For example, when the controller 108 determines that there is a large amount of electrical energy stored in the energy storage device 112, the electrical energy stored in the energy storage device 112 can be directly supplied to the load 300. On the contrary, when the controller 108 determines that the electrical energy stored in the energy storage device 112 is less, in order to ensure continuous and stable power supply to the load 300, the power generation device 110 can be used to generate electricity and supply the generated electrical energy to the load 300. Specifically, the controller 108 can first obtain the electrical energy stored in the energy storage device 112. When the electrical energy stored in the energy storage device 112 is greater than the minimum threshold, the electrical energy in the energy storage device 112 is supplied to the load 300. On the contrary, when the electrical energy stored in the energy storage device 112 is less than or equal to the minimum threshold, the power generation device 110 supplies electrical energy to the load 300.

[0070] Furthermore, the energy storage device 112 is also connected to the power generation device 110, so that the electrical energy generated by the power generation device 110 can be transmitted to the energy storage device 112, and the electrical energy generated by the power generation device 110 can be stored through the energy storage device 112. Specifically, when the electrical energy provided by the power grid 200 is normal, the power generation device 110 can be controlled to operate to store the electrical energy generated by the power generation device 110, so as to ensure the power supply demand of the load 300 when the electrical energy provided by the power grid 200 is abnormal.

[0071] In some embodiments, optionally, as Figure 1 and Figure 2 shown, the power generation device 110 includes: a photovoltaic power generation device 114, connected to the load 300 and the controller 108; a generator 116, connected to the load 300 and the controller 108.

[0072] In this embodiment, the power generation device 110 can include a photovoltaic power generation device 114 and a generator 116. It can be understood that by generating electricity through the photovoltaic power generation device 114, the sunlight during the day can be utilized to convert light energy into electrical energy, which can effectively reduce the power generation cost, and the power generation process is more environmentally friendly, reducing the pollution generated during the power generation process.

[0073] In addition, by generating electricity through the generator 116, when the photovoltaic power generation device 114 cannot operate normally, such as at night or when the sunlight is insufficient during the day, the electrical energy required by the load 300 can be ensured.

[0074] Further, the photovoltaic power generation device 114 includes: a photovoltaic panel 118; an inverter 120 connected to the photovoltaic panel 118 for converting the electric energy generated by the photovoltaic panel 118; and an optimizer 122 connected to the inverter 120 and the controller 108 for controlling the operation of the inverter 120.

[0075] Specifically, the photovoltaic power generation device 114 may include a photovoltaic panel 118. Specifically, the number of photovoltaic panels 118 may be multiple, and the photovoltaic panels 118 may be arranged above the building to ensure sufficient sunlight. Through the photovoltaic panel 118, the conversion of light energy into electric energy can be realized to complete the power generation process.

[0076] Further, the photovoltaic power generation device 114 further includes an inverter 120. The inverter 120 is connected to the photovoltaic panel 118. Through the inverter 120, the conversion of the electric energy generated by the photovoltaic panel 118 can be realized, and parameters such as the voltage value and current value of the electric energy output by the photovoltaic power generation device 114 can be controlled.

[0077] Further, the photovoltaic power generation device 114 further includes an optimizer 122. The optimizer 122 is connected to the inverter 120. Through the optimizer 122, the operation of the inverter 120 can be controlled, that is, the operating parameters of the inverter 120 can be controlled, so as to control the parameters of the electric energy output by the photovoltaic power generation device 114, such as voltage value, current value, and frequency, etc., thereby ensuring a stable and continuous supply of electric energy to the load 300 and ensuring the stable operation of the load 300.

[0078] At the same time, the optimizer 122 is also connected to the controller 108. Through the controller 108, the operation of the optimizer 122 can be controlled according to the specific parameters of the load 300, and then the operation of the inverter 120 can be controlled through the optimizer 122 to ensure that the parameters of the electric energy output by the photovoltaic power generation device 114 to the load 300 can meet the operation requirements of the load 300.

[0079] Specifically, a DC converter 146 and a transmission bus 148 are also provided between the photovoltaic panel 118 and the inverter 120 to ensure the stable transmission of electric energy.

[0080] In some embodiments, optionally, as Figure 1 and Figure 2 shown, the power supply system 100 further includes: a power line carrier communication device 124. The controller 108 and the optimizer 122 are communicatively connected through the power line carrier communication device 124.

[0081] In this embodiment, the power supply system 100 may further include a power line carrier communication device 124. Through the power line carrier communication device 124, data transmission between the controller 108 and the optimizer 122 can be realized.

[0082] Specifically, the optimizer 122 and the inverter 120 can be connected through a power line to achieve power transmission. The power line carrier communication device 124 can include a power line carrier communication chip and a magnetic ring. The magnetic ring is sleeved on the power line and connected to the power line carrier communication chip. The controller 108 can generate a transmission signal through the power line carrier communication chip and transmit it to the magnetic ring. When the transmission signal is transmitted to the magnetic ring, the magnetic core of the magnetic ring changes, so that the transmission signal is superimposed on the power line, and then the transmission signal is transmitted to the optimizer 122 through the power line to achieve signal transmission between the optimizer 122 and the controller 108.

[0083] In some embodiments, optionally, as Figure 1 and Figure 2 shown, the off-grid module 104 includes: a first switch unit 126, the first switch unit 126 is connected to the load 300 and the power module 106; a first sampling unit 128, the first sampling unit 128 is connected to the inverter 120, and is used to collect the current value and voltage value output by the power module 106; wherein, the controller 108 is used to control the operation of the power unit according to the current value and voltage value collected by the first sampling unit 128.

[0084] In this embodiment, the off-grid module 104 can include a first switch unit 126, and the first switch unit 126 is used to control the on-off between the power module 106 and the load 300. That is, when the controller 108 detects that the electric energy provided by the power grid 200 is abnormal, the controller 108 can control the first switch unit 126 to turn on, so as to connect the power module 106 and the load 300, so as to realize power supply to the load 300 through the power module 106.

[0085] Specifically, the first switch unit 126 can include a relay. Compared with the mechanical dual-power switch in the related art, the relay has a faster response speed and can achieve fast switching, so as to avoid losses caused by too long power-off time of the load 300. In addition, the first switch unit 126 can also include switch devices such as contactors and circuit breakers.

[0086] Furthermore, the off-grid module 104 may further include a first sampling unit 128. The first sampling unit 128 is connected to the inverter 120 to sample the electrical energy output by the inverter 120. Specifically, the voltage value and current value of the electrical energy output by the inverter 120 can be collected. At the same time, the first sampling unit 128 is also connected to the controller 108, so that the controller 108 can receive the voltage value and current value collected by the first sampling unit 128. Furthermore, the controller 108 can control the operation of the inverter 120 through the optimizer 122 according to the voltage value and current value of the electrical energy output by the inverter 120, ensuring the quality of the electrical energy output by the inverter 120, and thus ensuring the stable operation of the load 300.

[0087] In some embodiments, optionally, as Figure 1 and Figure 2 shown, the off-grid module 104 further includes: a second switch unit 130, connected to the generator 116, the first switch unit 126, and the controller 108; a second sampling unit 132, connected to the generator 116 and the controller 108, for collecting the voltage value of the electrical energy output by the generator 116.

[0088] In this embodiment, the generator 116 may specifically be a diesel generator 116. Through the operation of the generator 116, the generation of electrical energy can be achieved.

[0089] Furthermore, the off-grid module 104 may further include a second switch unit 130 and a second sampling unit 132. Among them, the second switch unit 130 is connected to the generator 116 and the first switch unit 126. By controlling the first switch unit 126 and the second switch unit 130 through the controller 108, the electrical energy generated by the generator 116 can be transmitted to the load 300. At the same time, through the second sampling unit 132, the voltage value and current value of the electrical energy generated by the generator 116 can be sampled, so as to determine whether the generator 116 can provide continuous and stable electrical energy for the load 300 to ensure the normal operation of the load 300.

[0090] In some embodiments, optionally, as Figure 1 and Figure 2 shown, the off-grid module 104 further includes: an emergency detection device 134, connected to the load 300 and the controller 108, for detecting the current value flowing into the load 300; an emergency switch 136, connected to the load 300 and the controller 108; wherein, the controller 108 is used to control the emergency switch 136 to conduct or turn off according to the current value detected by the emergency detection device 134.

[0091] In this embodiment, the off-grid module 104 may further include an emergency detection device 134 and an emergency switch 136. The emergency detection device 134 is connected to the load 300 and the controller 108, so as to detect the current value input to the load 300 and provide it to the controller 108. The controller 108 may control the emergency switch 136 to turn off when detecting that the current value input to the load 300 is abnormal, thereby avoiding the abnormal current from affecting the operation of the load 300.

[0092] In some embodiments, optionally, as Figure 1 and Figure 2 shown, the grid-connected module 102 includes: a third switch unit 138, the third switch unit 138 is connected to the power grid 200 and the controller 108; a third sampling unit 140, the third sampling unit 140 is connected to the power grid 200 and the controller 108, and the third sampling unit 140 is used to collect the parameter values of the electric energy provided by the power grid 200; wherein, the controller 108 is used to control the third switch unit 138 when the parameter values of the electric energy provided by the power grid 200 collected by the third sampling unit 140 are abnormal, so that the load 300 is disconnected from the power grid 200.

[0093] In this embodiment, the grid-connected module 102 includes a third switch unit 138 and a third sampling unit 140. Among them, the third switch unit 138 is connected to the power grid 200 and the controller 108. The controller 108 can control the third switch unit 138 to connect or disconnect the load 300 from the power grid 200.

[0094] Since the third sampling unit 140 is connected to the power grid 200 and the controller 108, the third sampling unit 140 can sample the voltage value of the electric energy output by the power grid 200 and provide it to the controller 108. The controller 108 may control the third switch unit 138 to disconnect when detecting that the voltage value of the electric energy provided by the power grid 200 is abnormal, so that the load 300 is disconnected from the power grid 200, in order to avoid the abnormal electric energy provided by the power grid 200 from affecting the load 300.

[0095] In some embodiments, optionally, the number of loads 300 is multiple, and the multiple loads 300 are connected to the controller 108; wherein, the controller 108 is further used to allocate power to the multiple loads 300 according to the voltage value output by the power module 106.

[0096] In this embodiment, the number of loads 300 may be multiple, and the multiple loads 300 are all connected to the controller 108. The controller 108 can allocate power to the multiple loads 300 according to the voltage value output by the power module 106.

[0097] Exemplarily, the load 300 may include loads 300 such as a refrigerator, a security door lock, an aquarium, a wine cellar, automatic curtains, a mobile socket, etc. When the voltage value output by the power module 106 is relatively low, in order to minimize the loss caused by the load 300 being unable to obtain normal power supply, the controller 108 may obtain one or several relatively important loads 300 among the multiple loads 300 for power supply. For example, it may select to supply power to the security door lock to ensure the safety of the room, or select to supply power to the refrigerator to prevent the food in the refrigerator from spoiling. Additionally, when the voltage value output by the power module 106 is relatively high, the controller 108 may control the off-grid module 104 to supply power to all loads 300.

[0098] In some embodiments, optionally, as Figure 1 and Figure 2 shown, the power supply system 100 further includes: a host computer 142, communicatively connected to the controller 108; wherein, the controller 108 is further configured to control the grid-connected module 102 and the off-grid module 104 to operate according to the control instructions issued by the host computer 142.

[0099] In this embodiment, the power supply system 100 may further include a host computer 142, and the host computer 142 is communicatively connected to the controller 108. By setting up the host computer 142, the user can use the host computer 142 to control the controller 108, thereby realizing the control of the grid-connected module 102 and the off-grid module 104, and further meeting the user's electricity demand.

[0100] Specifically, the host computer 142 may include a personal computer, a mobile phone, a tablet computer, etc., and may specifically be the corresponding application programs in the personal computer, mobile phone, and tablet computer. The host computer 142 and the controller 108 may be communicatively connected through a data cable or through a wireless network.

[0101] In some embodiments, optionally, as Figure 1 and Figure 2 shown, the power supply system 100 further includes: an environment detection device 144, connected to the controller 108, for detecting environment parameters; wherein, the controller 108 is further configured to control the grid-connected module 102 and the off-grid module 104 to operate according to the environment parameters.

[0102] In this embodiment, the power supply system 100 may further include an environment detection device 144. The environment detection device 144 is used to detect the environment parameters of the environment where the user is located, and the environment detection device 144 is connected to the controller 108, so that the controller 108 can receive the environment parameters detected by the environment detection device 144, and then control the grid-connected module 102 and the off-grid module 104 to operate according to the environment parameters.

[0103] Specifically, the environmental detection device 144 can detect the weather conditions of the environment where the user is located. The controller 108 combines the weather conditions and the user's power consumption to control the grid-connected module 102 and the off-grid module 104. Specifically, when the environmental detection device 144 detects good weather conditions and sufficient sunlight, the controller 108 combines the weather conditions and the user's power consumption, and can then control the grid-connected module 102 to disconnect the load 300 from the power grid 200, and control the off-grid module 104 to enable the power module 106 to supply power to the load 300, thereby reducing the purchase of electric energy from the power grid 200.

[0104] In a specific embodiment, as Figure 2 shown, the power supply system 100 provided by the present utility model may include a controller 108, an energy storage device 112, a power distribution cabinet 150, a photovoltaic power generation device 114, and a generator 116. Among them, the power distribution cabinet 150 includes a grid-connected module 102 and an off-grid module 104. The grid-connected module 102 is connected to the power grid 200 and the load 300, and the off-grid module 104 is connected to the photovoltaic power generation device 114, the energy storage device 112, and the generator 116. During the user's power consumption, the controller 108 collects the parameters of the electric energy provided by the power grid 200 through a sampling unit provided in the off-grid module 104. Specifically, it can collect the zero-crossing point of the voltage, the instantaneous voltage value, the effective voltage value, and the frequency of the electric energy provided by the power grid 200, etc., so as to judge whether the electric energy provided by the power grid 200 can supply power to the load 300 normally through the collected electric energy parameters. If the controller 108 judges that the parameters of the electric energy provided by the power grid 200 are abnormal, it can control the grid-connected module 102 to disconnect the load 300 from the power grid 200. Specifically, the relay in the grid-connected module 102 can be controlled to disconnect the load 300 from the power grid 200.

[0105] Furthermore, the controller 108 controls the off-grid module 104 to supply power to the load 300 through the photovoltaic power generation device 114, the energy storage device 112, or the generator 116. Specifically, the controller 108 can first judge whether the electric energy stored in the energy storage device 112 is sufficient. When the electric energy stored in the energy storage device 112 is sufficient, the controller 108 can send control signals to devices such as the DC converter and the inverter 120 connected between the energy storage device 112 and the load 300 through the power line carrier communication device 124, so as to control the operation of devices such as the DC converter and the inverter 120, thereby providing power matching the load 300.

[0106] When the electric energy stored in the energy storage device 112 is insufficient and the outdoor light is good, the photovoltaic power generation device 114 can supply power to the load 300. Specifically, the controller 108 can send a control signal to the optimizer 122 of the photovoltaic power generation device 114 through the power line carrier communication device 124 to control the operation of devices such as the DC converter and the inverter 120 through the optimizer 122, so as to provide the load 300 with matching electric energy.

[0107] When the electric energy stored in the energy storage device 112 is insufficient and the outdoor light is also insufficient, the generator 116 can supply power to the load 300.

[0108] Among them, during the process of supplying power to the load 300 through the energy storage device 112, the photovoltaic power generation device 114 or the generator 116, the controller 108 can select the relatively important key load 300 from multiple loads 300 for power supply according to the specific situation. Specifically, when the voltage value output by the energy storage device 112, the photovoltaic power generation device 114 or the generator 116 is relatively low, in order to minimize the loss caused by the load 300 being unable to obtain normal power supply, the controller 108 can obtain one or several relatively important loads 300 from multiple loads 300 for power supply. For example, it can select to supply power to the safety door lock to ensure the safety of the room, and can select to supply power to the refrigerator to prevent the food in the refrigerator from spoiling. In addition, when the voltage value output by the energy storage device 112, the photovoltaic power generation device 114 or the generator 116 is relatively high, the controller 108 can control the off-grid module 104 to supply power to all loads 300.

[0109] Specifically, the controller 108 can be communicatively connected to the upper computer 142, and the user can control the controller 108 through the upper computer 142, and then control the operation of the power supply system 100 to achieve remote control. The controller 108 and the off-grid module 104, the grid-connected module 102 perform data transmission through the Recommended Standard 485 communication protocol.

[0110] In a specific embodiment, the power supply system 100 can provide different modes of power supply processes in combination with the weather conditions and the user's electricity consumption habits. Specifically, the power supply modes can include:

[0111] Intelligent Mode: Combining the user's electricity consumption habits, the predicted power generation of the photovoltaic power generation device 114, and the weather conditions, the power supply system 100 conducts dynamic intelligent scheduling of electric energy. When there is still a surplus in the power generation of the photovoltaic power generation device 114, the excess electric energy can be automatically transmitted to the public power grid 200 to generate income; the scheduling of the electric energy stored in the energy storage device 112 will be comprehensively scheduled according to weather conditions, electricity consumption prediction, electricity price, etc. to achieve flexible electricity use. For example, when the power supply system 100 predicts that the sunlight is sufficient on a certain day and the daytime electricity consumption decreases (that is, most of the electric energy generated by the photovoltaic power generation device on a certain day can charge the energy storage device 112), it will schedule more electric energy in the energy storage device 112 to supply power to the load 300 on that day, and reduce the purchase of electricity from the power grid 200. For example, after the power supply system 100 obtains the peak and valley values of the electricity price on a certain day, it will give priority to charging the battery during the valley value stage, and give priority to scheduling the battery to discharge during the peak value stage to reduce the electricity purchase cost.

[0112] Green Electricity Mode: Give priority to using the photovoltaic power generation device 114 to supply power to the load 300 and charge the energy storage device 112. Based on intelligent algorithms, the power supply system 100 conducts dynamic control of the load 300 to maximize the use of the electric energy generated by the photovoltaic power generation device 114, reduce carbon emissions, and help achieve "carbon peak" and "carbon neutrality". During the day, the photovoltaic power generation device 114 gives priority to supplying power to the load 300, and the excess electric energy will charge the energy storage device 112. If the energy storage device 112 is already full, it will control other energy devices in the user's room, such as heat pumps, to convert electric energy into heat energy. At this time, if there is still a surplus in the power generation of the photovoltaic power generation device 114, it will sell electricity to the power grid 200. At night, give priority to using the electric energy in the energy storage device 112 to supply power to the load 300. When the electric energy of the energy storage device 112 reaches the threshold of the standby reserved power, the energy storage device 112 will stop discharging. Whether during the day or at night, electricity will only be purchased from the power grid 200 when the power of the photovoltaic power generation device 114 or the energy storage device 112 is insufficient. The power supply to the load 300 comes first from the photovoltaic power generation device 114, followed by the energy storage device 112, and finally from the power grid 200. The photovoltaic power generation device 114 gives priority to supplying power to the load 300, followed by charging the battery, and finally uses the power grid 200 to supply power to the load 300.

[0113] Storm mode: When extreme weather is predicted in the future, the power supply system 100 automatically gives priority to fully charging the energy storage device 112. In case of a sudden power outage, the energy storage device 112 can supply power to the load 300 to avoid losses. In storm mode, the power supply system 100 will give priority to fully charging the energy storage device 112 in the shortest possible time and stop scheduling the energy storage device 112 to discharge. The power consumption of the load 300 will be mainly supplied by the photovoltaic power generation device 114 and the power grid 200 to ensure that the energy storage device 112 has enough power for the load 300 whenever extreme weather occurs. After the extreme weather warning is lifted, the power supply system 100 will automatically return to the green power mode. The photovoltaic power generation device 114 gives priority to charging the energy storage device 112, secondly supplies power to the load 300, and finally uses the power grid 200 to supply power to the load 300. The power supply to the load 300 is given priority from the power grid 200. If the photovoltaic power generation device 114 has surplus power for charging the energy storage device 112, the remaining power will supply the load 300 together with the power grid 200.

[0114] Power grid 200 charging mode: When the price of the power grid 200 is cheap, the power grid 200 is allowed to charge the energy storage device 112; when the price of the power grid 200 is high, the energy storage device 112 is allowed to discharge to supply the load 300 or sell it to the power grid 200 to obtain the price difference.

[0115] Generator backup power mode: When there is an external generator device, the electric energy generated by the generator first fully charges the energy storage device 112, secondly supplies power to the load 300, and the surplus electric energy is then sold to the power grid 200; when there is no external generator device, the power grid 200 is used to charge the energy storage device 112.

[0116] In the description of the present utility model, the term "a plurality of" refers to two or more, unless otherwise clearly defined. The orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model; terms such as "connection", "installation", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0117] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0118] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, various changes and modifications can be made to the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A power supply system, characterized in that, Comprising: A grid-connected module for connecting to a power grid and a load; An off-grid module for connecting to the load; A power module connected to the off-grid module for generating and storing electrical energy; A controller communicatively connected to the grid-connected module, the off-grid module, and the power module, for sending control signals to the grid-connected module, the off-grid module, and the power module to control their operations.

2. The power supply system according to claim 1, characterized in that The power module includes: A power generation device connected to the load and the controller; An energy storage device connected to the load, the power generation device, and the controller; wherein the energy storage device is used for storing the electrical energy generated by the power generation device.

3. The power supply system according to claim 2, wherein The power generation device includes: A photovoltaic power generation device connected to the load and the controller; A generator connected to the load and the controller.

4. The power supply system according to claim 3, characterized in that, The photovoltaic power generation device includes: Photovoltaic panels; An inverter connected to the photovoltaic panels for converting the electrical energy generated by the photovoltaic panels; An optimizer connected to the inverter and the controller for controlling the operation of the inverter.

5. The power supply system according to claim 4, wherein The controller includes: A power line carrier communication device through which the controller is communicatively connected to the optimizer.

6. The power supply system according to claim 4, wherein The off-grid module includes: A first switch unit connected to the load and the power module; A first sampling unit connected to the inverter for collecting the current value and voltage value output by the power module; wherein the controller is used for controlling the operation of the power module according to the current value and voltage value collected by the first sampling unit.

7. The power supply system according to claim 6, wherein The off-grid module further includes: A second switch unit connected to the generator, the first switch unit, and the controller; A second sampling unit connected to the generator and the controller for collecting the voltage value output by the generator.

8. The power supply system according to claim 4, characterized in that, The off-grid module further includes: An emergency detection device connected to the load and the controller for detecting the current value flowing into the load; An emergency switch connected to the load and the controller; wherein the controller is used for controlling the conduction or cutoff of the emergency switch according to the current value detected by the emergency detection device.

9. The power supply system according to any one of claims 1 to 8, characterized in that The grid-connected module includes: A third switch unit connected to the power grid and the controller; A third sampling unit connected to the power grid and the controller for collecting the parameter values of the electrical energy provided by the power grid; wherein the controller is used for controlling the third switch unit to disconnect the load from the power grid when the parameter values of the electrical energy provided by the power grid collected by the third sampling unit are abnormal.

10. The power supply system according to any one of claims 1 to 8, characterized in that, The number of the loads is multiple, and the multiple loads are connected to the controller; wherein the controller is further used for allocating electric power to the multiple loads according to the voltage value output by the power module.

11. The power supply system according to any one of claims 1 to 8, characterized in that The power supply system further includes: A host computer communicatively connected to the controller; Wherein, the controller is further configured to control the grid-connected module and the off-grid module to operate according to the control instructions issued by the host computer.

12. The power supply system according to any one of claims 1 to 8, characterized in that, The power supply system further includes: An environment detection device, connected to the controller, for detecting environmental parameters; Wherein, the controller is further configured to control the grid-connected module and the off-grid module to operate according to the environmental parameters.

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