Bus-sharing photovoltaic illuminating lamp body control system

Abstract

The utility model relates to the technical field of lighting, and discloses a bus-sharing photovoltaic lighting lamp body control system, which comprises a first power supply bus; a photovoltaic panel, a lamp body, a main control box and a storage battery; the photovoltaic panel is electrically connected with the first power supply bus; the lamp body is electrically connected with the first power supply bus; the number of the photovoltaic panels and the number of the lamp bodies are both multiple, and the multiple photovoltaic panels and the multiple lamp bodies are both electrically connected with the first power source bus. An inverter used for being electrically connected with a municipal power supply is fixedly mounted in the main control box; the inverter is electrically connected with the first power supply bus; a main control board used for controlling the inverter is arranged in the main control box, and the main control board is electrically connected with the inverter; the storage battery is electrically connected with the inverter; and the storage battery is electrically connected with the main control board. Lighting interruption caused by weather reasons is completely eradicated, continuous and stable operation of the lighting system is ensured, and the reliability is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lighting, and relates to a photovoltaic lighting lamp body control system sharing a busbar. BACKGROUND

[0002] With the popularization of solar energy technology, photovoltaic lighting lamp bodies have been widely applied in public lighting fields such as roads and parks. At present, most solar energy lamp bodies adopt an independent power supply and control mode, that is, each lamp body is independently provided with a photovoltaic panel, a storage battery and a controller. In order to ensure normal work in the case of continuous rainy weather, the storage battery of each lamp body must have a large capacity redundancy, and each lamp body is provided with an independent battery, a controller and the like, thereby increasing the production cost of each photovoltaic lighting lamp.

[0003] In addition, the existing independent photovoltaic lamp body system is self-contained and cannot form effective complementation with the existing municipal power grid. When the light is seriously insufficient and the storage battery is depleted, the system will be paralyzed, and there is a lack of reliable backup power supply guarantee. At the same time, the system cannot realize the economic operation of 'peak clipping and valley filling' by using the price difference of the power grid, and cannot feed back the excess power to the power grid, so the comprehensive utilization efficiency of resources is low. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a photovoltaic lighting lamp body control system sharing a busbar, and aims to solve the above problems.

[0005] In one scheme, the present application provides a photovoltaic lighting lamp body control system sharing a busbar, comprising:

[0006] a first power busbar;

[0007] a photovoltaic panel, which is electrically connected with the first power busbar;

[0008] a lamp body, which is electrically connected with the first power busbar; the number of the photovoltaic panels and the number of the lamp bodies are both plural, and the plurality of photovoltaic panels and the plurality of lamp bodies are all electrically connected with the first power busbar;

[0009] a main control box, which is internally fixedly installed with an inverter for electrical connection with a municipal power supply; the inverter is electrically connected with the first power busbar; the main control box has a main control board for controlling the inverter, and the main control board is electrically connected with the inverter;

[0010] a storage battery, which is electrically connected with the inverter; the storage battery is electrically connected with the main control board.

[0011] In one scheme, the inverter comprises a bidirectional AC / DC conversion module, a first bidirectional DC / DC conversion module, and a second bidirectional DC / DC conversion module; the bidirectional AC / DC conversion module, the first bidirectional DC / DC conversion module, and the second bidirectional DC / DC conversion module are electrically connected with the main control board; the bidirectional AC / DC conversion module is electrically connected with the municipal power supply, and the bidirectional AC / DC conversion module is electrically connected with the second bidirectional DC / DC conversion module through the second power bus; the second bidirectional DC / DC conversion module is electrically connected with the first power bus; the first bidirectional DC / DC conversion module is electrically connected with the battery, and the first bidirectional DC / DC conversion module is electrically connected with the second bidirectional DC / DC conversion module through the second power bus.

[0012] Specifically, the municipal power supply supplies power to the lamp body through the bidirectional AC / DC conversion module and the second bidirectional DC / DC conversion module in sequence, and the municipal power supply charges the battery through the bidirectional AC / DC conversion module and the first bidirectional DC / DC conversion module in sequence; the power generated by the photovoltaic panel charges the battery through the second bidirectional DC / DC conversion module and the first bidirectional DC / DC conversion module in sequence; the power generated by the photovoltaic panel is integrated into the municipal power supply through the second bidirectional DC / DC conversion module and the bidirectional AC / DC conversion module in sequence.

[0013] In one scheme, the bidirectional AC / DC conversion module is electrically connected with the municipal power supply through an LC filter and an AC filter in sequence.

[0014] In one scheme, the main control box further fixedly has a brightness sensor for sensing the brightness of the surrounding environment, and the brightness sensor is electrically connected with the main control board.

[0015] In one scheme, the main control board is further electrically connected with a signal transmission module, and the signal transmission module is used for wireless connection with a cloud server.

[0016] In one scheme, the main control board is an MCU chip.

[0017] In one scheme, the first power bus is electrically connected with the lamp body through a driver.

[0018] In one scheme, each photovoltaic panel and the lamp body are electrically connected with the first power bus through a diode.

[0019] Specifically, the driving of the lamp body is designed to be turned on at a voltage of 150V or above, and the photovoltaic panel generates a voltage of <150V. During the day, the lighting lamp body does not work under sufficient sunlight.

[0020] The application has the following beneficial effects:

[0021] By setting a common first power bus, the power supply of multiple lamp bodies is integrated, realizing centralized management and distribution of photovoltaic energy and battery resources. This greatly reduces the required battery capacity configuration of each lamp body, avoids capacity redundancy waste under a distributed system, and significantly reduces the initial investment cost. At the same time, the core control components (main control board, inverter) and the battery are arranged in the main control box, so that the system state is clear at a glance, facilitating centralized monitoring and maintenance, and significantly reducing the later operation and maintenance cost and difficulty.

[0022] By connecting the inverter in the main control box with the municipal power supply, a reliable power supply architecture of "photovoltaic energy first, municipal power supply backup" is formed. Clean solar energy is used preferentially when the light is sufficient; when the battery power is insufficient due to continuous rainy weather, the system can automatically switch to the municipal power supply to power the lamp body, fundamentally eliminating lighting interruption caused by weather, ensuring the continuous and stable operation of the lighting system, and greatly improving the reliability.

[0023] The main control board can intelligently dispatch photovoltaic energy, battery energy storage, and municipal grid power. On the one hand, it can achieve "peak load shifting", that is, using municipal power to charge the battery during the night when the electricity price is low, and using the battery to discharge during the day when the electricity price is high or when the photovoltaic power generation is insufficient, effectively reducing the operating electricity cost. On the other hand, when the photovoltaic power generation exceeds the lighting and energy storage demand, the excess power can be "fed back" to the municipal power grid through the inverter, generating additional economic benefits, further improving the comprehensive energy utilization efficiency and economy of the system. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Fig. 1 is a control system structure schematic diagram in an embodiment of the present application;

[0026] Fig. 2 is a main control box control process schematic diagram in an embodiment of the present application;

[0027] Fig. 3 is a driver circuit structure schematic diagram in an embodiment of the present application;

[0028] Reference signs in the drawings:

[0029] 1, first power bus; 11, second power bus; 2, photovoltaic panel; 3, lamp body; 31, driver; 4, main control box; 41, main control board; 42, signal transmission module; 43, cloud server; 5, inverter; 51, bidirectional AC / DC conversion module; 52, first bidirectional DC / DC conversion module; 53, second bidirectional DC / DC conversion module; 6, battery; 7, LC filter; 8, AC filter; 9, brightness sensor. DETAILED DESCRIPTION

[0030] The specific embodiments of the present application will be further described in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application. Similarly, the following examples are only part of the embodiments of the present application, not all embodiments of the present application, and all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0033] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In the utility model, unless another definite provision and limitation, first feature is on second feature "on" or "under", first and second features can be direct contact, or first and second features are indirectly contacted through intermediate medium. Moreover, first feature "on", "above" and "upper surface" of second feature can be first feature directly above or obliquely above second feature, or only indicate that first feature horizontal height is higher than second feature. First feature "under", "below" and "lower surface" of second feature can be first feature directly below or obliquely below second feature, or only indicate that first feature horizontal height is less than second feature.

[0035] In the utility model, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" 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 utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0036] The application makes improvements and innovations, and proposes the following embodiments.

[0037] In some embodiments, referring to Figs. 1 to 3 , a common busbar photovoltaic lighting lamp body 3 control system is provided, comprising:

[0038] The first power bus 1;

[0039] The photovoltaic panel 2 is electrically connected with the first power bus 1;

[0040] The lamp body 3 is electrically connected with the first power bus 1;The number of photovoltaic panels 2 and lamp bodies 3 is multiple, and the plurality of photovoltaic panels 2 and lamp bodies 3 are electrically connected with the first power bus 1;

[0041] The main control box 4 is internally fixedly installed with an inverter 5 for electrical connection with the municipal power supply;The inverter 5 is electrically connected with the first power bus 1;The main control box 4 has a main control board 41 for controlling the inverter 5, and the main control board 41 is electrically connected with the inverter 5;

[0042] The storage battery 6 is electrically connected with the inverter 5;The storage battery 6 is electrically connected with the main control board 41.

[0043] Among them, the lamp body 3 is LED lamp.

[0044] By setting a common first power bus 1, the power supply of multiple lamp bodies 3 is integrated, and centralized management and distribution of photovoltaic energy and battery 6 resources are realized. This greatly reduces the required battery 6 capacity configuration of each lamp body 3, avoids capacity redundancy waste under a distributed system, and greatly reduces the initial investment cost. At the same time, the core control components (main control board 41, inverter 5) and battery 6 are arranged in the main control box 4, so that the system state is clear at a glance, facilitating centralized monitoring and maintenance, and significantly reducing the later operation and maintenance cost and difficulty.

[0045] By connecting the inverter 5 in the main control box 4 with the municipal power supply, a reliable power supply architecture of "photovoltaic energy first, municipal power backup" is formed. Clean solar energy is used first when the light is sufficient; when the battery 6 is insufficient due to continuous rainy weather, the system can automatically switch to the municipal power supply to power the lamp body 3, fundamentally eliminating lighting interruption caused by weather, ensuring the continuous and stable operation of the lighting system, and greatly improving the reliability.

[0046] The main control board 41 can intelligently schedule photovoltaic energy, battery 6 energy storage, and municipal grid power. On the one hand, it can achieve "peak load shifting", that is, using municipal power to charge the battery 6 during the night when the electricity price is low, and using the battery 6 to discharge during the day when the electricity price is high or when the photovoltaic power generation is insufficient, effectively reducing the operating electricity cost. On the other hand, when the photovoltaic power generation exceeds the lighting and energy storage demand, the excess energy can be "fed back" to the municipal power grid through the inverter 5, generating additional economic benefits, and further improving the comprehensive energy utilization efficiency and economy of the system.

[0047] In one embodiment, the inverter 5 includes a bidirectional AC / DC conversion module 51, a first bidirectional DC / DC conversion module 52, and a second bidirectional DC / DC conversion module 53; the bidirectional AC / DC conversion module 51, the first bidirectional DC / DC conversion module 52, and the second bidirectional DC / DC conversion module 53 are electrically connected with the main control board 41; the bidirectional AC / DC conversion module 51 is electrically connected with the municipal power supply, and the bidirectional AC / DC conversion module 51 is electrically connected with the second bidirectional DC / DC conversion module 53 through the second power bus 11; the second bidirectional DC / DC conversion module 53 is electrically connected with the first power bus 1; the first bidirectional DC / DC conversion module 52 is electrically connected with the battery 6, and the first bidirectional DC / DC conversion module 52 is electrically connected with the second bidirectional DC / DC conversion module 53 through the second power bus 11.

[0048] The inverter 5 function is decomposed into three special modules (bidirectional AC / DC conversion module, first bidirectional DC / DC conversion module, second bidirectional DC / DC conversion module), realizing highly controllable and efficient conversion of system energy flow. This modular architecture enables flexible and accurate scheduling of various working modes such as municipal power supply, photovoltaic charging, battery charging and discharging, and surplus electricity grid connection through the main control board 41, enhancing system reliability and maintainability. The failure of a single module does not affect the basic functions of other modules, facilitating diagnosis and replacement, and reducing operation and maintenance costs.

[0049] Specifically, the municipal power supply supplies power to the lamp body 3 through the bidirectional AC / DC conversion module 51 and the second bidirectional DC / DC conversion module 53 in turn, and charges the battery 6 through the bidirectional AC / DC conversion module 51 and the first bidirectional DC / DC conversion module 52 in turn; the power generated by the photovoltaic panel 2 charges the battery 6 through the second bidirectional DC / DC conversion module 53 and the first bidirectional DC / DC conversion module 52 in turn; the power generated by the photovoltaic panel 2 is incorporated into the municipal power supply through the second bidirectional DC / DC conversion module 53 and the bidirectional AC / DC conversion module 51 in turn.

[0050] The second bidirectional DC / DC conversion module can adjust the voltage output to the first power bus, thereby adjusting the brightness of the lamp body.

[0051] Specifically, the bidirectional AC / DC conversion module 51, the first bidirectional DC / DC conversion module 52, and the second bidirectional DC / DC conversion module 53 can be obtained on the market.

[0052] Specifically, the bidirectional AC / DC conversion module 51 is an AC-DC conversion module for converting alternating current to direct current; the first bidirectional DC / DC conversion module 52 is a DC-DC conversion module for boosting the input direct current voltage to the lamp body 3, and at the same time adjusting the photovoltaic panel 2 power generation voltage to the same as the direct current voltage output by the bidirectional AC / DC conversion module 51, so that the bidirectional AC / DC conversion module 51 converts the photovoltaic panel 2 power generation into alternating current and incorporates it into the municipal power grid; the second bidirectional DC / DC conversion module 53 is a DC-DC conversion module for converting the direct current output by the bidirectional AC / DC conversion module 51 and / or the first bidirectional DC / DC conversion module 52 to the charging voltage (48V) of the battery 6, or converting the voltage of the battery 6 to the same direct current voltage as the bidirectional AC / DC conversion module 51 and / or the first bidirectional DC / DC conversion module 52.

[0053] In one embodiment, the bidirectional AC / DC conversion module 51 is electrically connected to the municipal power supply through the LC filter 7 and the AC filter 8 in turn.

[0054] Among them, the LC filter 7 and the AC filter 8 are widely used devices in the market.

[0055] The LC filter 7 and the AC filter 8 arranged at the power access end can effectively filter out the high-frequency harmonic interference generated by the switching action of the inverter 5, prevent electromagnetic pollution to the municipal power grid, and ensure that the grid-connected power quality meets the national standards. At the same time, it can also suppress the impact of transient fluctuations and disturbances on the system, protecting sensitive equipment such as the conversion module and the battery 6 in the system, and improving the electromagnetic compatibility and operation stability of the entire system.

[0056] In one embodiment, the brightness sensor 9 for sensing the brightness of the surrounding environment is also fixedly installed in the main control box 4, and the brightness sensor 9 is electrically connected with the main control board 41.

[0057] Through the integration of the brightness sensor 9, the control system realizes intelligent start-stop based on environmental lighting. The main control board 41 can automatically control the switching of the lamp body 3 according to the real-time environmental brightness, replacing the traditional mechanical control method relying on fixed time clocks. This not only realizes the intelligent management of "lighting when it is dark and extinguishing when it is light", improves the user experience, but also avoids the misoperation of turning off the light in poor light conditions such as rainy weather, or turning on the light too early in the morning, thereby further saving electric energy.

[0058] In one embodiment, the main control board 41 is also electrically connected with the signal transmission module 42, and the signal transmission module 42 is used for wireless connection with the cloud server 43.

[0059] By adding the signal transmission module 42 (wireless communication module) and connecting the cloud server 43, the system is given the ability of remote monitoring and management. The operation and maintenance personnel can real-time view the system power generation, battery status, lamp body 3 working state, fault alarm and other information on the cloud, and remotely set the operation parameters (such as charging and discharging strategy, dimming strategy). This realizes centralized and platformized operation and maintenance of the system, greatly reduces the labor and time cost of on-site inspection, realizes predictive maintenance, and is an important part of building a smart city Internet of Things.

[0060] The signal transmission module 42 is electrically connected with the cloud server 43 through 4G / 5G communication.

[0061] In one embodiment, the main control board 41 is an MCU chip.

[0062] Using an MCU (microcontroller) chip as the core of the main control board 41 has the advantages of strong processing capability, low power consumption, high reliability, and good cost-effectiveness. Its powerful computing capability and rich peripheral interfaces can accurately execute complex energy scheduling algorithms, process brightness sensor 9 signals, wireless communication data, and coordinate work with multiple conversion modules, which is the hardware foundation for the system to realize high automation and intelligence.

[0063] In one embodiment, the first power bus 1 is electrically connected to the lamp body 3 through the driver 31.

[0064] The first power bus 1 supplies power to the lamp body 3 through the dedicated driver 31, which can provide constant and accurate current and voltage to the lamp body 3. This not only ensures the stability of the light-emitting efficiency and brightness of the lamp body 3, but also effectively prevents damage to the LED chip caused by current and voltage fluctuations, greatly extending the service life of the lamp body 3. The driver 31 is the key guarantee for achieving high-quality and long-life lighting output.

[0065] The driver 31 of the present application (see Fig. 3 ) is the smallest version of power available on the market.

[0066] This directly reduces the material procurement cost of the core device. Since the number of lamp bodies in the system is large, the cost savings effect produced by this design choice will be greatly magnified, thereby significantly reducing the overall cost of the entire lighting system.

[0067] Small power drivers usually have the highest conversion efficiency near their rated load. By sharing the bus to supply power, the instantaneous driving power required by each lamp body is reduced, allowing the small power driver to work in its high efficiency range. This reduces the loss of electrical energy at this link, improves the overall energy utilization efficiency from the DC bus to the LED beads, and achieves further energy saving.

[0068] In one embodiment, each photovoltaic panel 2 and lamp body 3 is electrically connected to the first power bus 1 through a diode.

[0069] A diode is connected in series at the access point of each photovoltaic panel 2 and lamp body 3, which plays a key role in "preventing reverse current".

[0070] For the photovoltaic panel 2, the diode can prevent the current on the first power bus 1 from flowing reversely into the photovoltaic panel 2 at night or when not generating electricity, causing energy waste and equipment damage.

[0071] For the lamp body 3, the diode can ensure one-way current flow, improving the stability of the circuit.

[0072] In addition, this design achieves electrical isolation of each branch, effectively avoiding the impact of a single photovoltaic panel 2 or lamp body 3 failure on the entire first power bus 1 system, improving the overall reliability and fault tolerance of the system.

[0073] Specifically, the driving of the lamp body 3 is turned on at 150V or above, while the photovoltaic panel 2 generates power voltage < 150V. In the daytime with sufficient sunlight, the lighting lamp body 3 does not work. By setting the starting voltage of the lamp body 3 to be higher than the maximum power generation voltage of the photovoltaic panel 2 (such as 150V), the voltage difference is ingeniously used to realize the automatic mode switching of the system. In the daytime with sufficient sunlight, the output voltage of the photovoltaic panel 2 is not enough to light up the lamp body 3, and the power generation energy of the photovoltaic panel 2 is automatically directed to charge the battery 6; at night, the photovoltaic panel 2 stops generating power, and the high-voltage power provided by the battery 6 or the mains lights up the lamp body 3. This "logic control" at the pure hardware level does not need the master control board 41 to intervene, realizes the automatic, seamless and reliable switching of the day and night working modes, and the circuit design is simple and efficient.

[0074] The above is only an optional embodiment of the present application and does not limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application. Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. Those skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. A photovoltaic lighting luminary control system sharing a common bus, characterized by, The utility model relates to a street lamp system, which comprises: a first power bus; a plurality of photovoltaic panels electrically connected to the first power bus; a plurality of lamp bodies electrically connected to the first power bus; a main control box in which an inverter for electrical connection to a municipal power supply is fixedly installed; the inverter is electrically connected to the first power bus; the main control box has a main control board for controlling the inverter, and the main control board is electrically connected to the inverter; a storage battery electrically connected to the inverter; the storage battery is electrically connected to the main control board.

2. The control system of claim 1, wherein, The inverter comprises a bidirectional AC / DC conversion module, a first bidirectional DC / DC conversion module, and a second bidirectional DC / DC conversion module; the bidirectional AC / DC conversion module, the first bidirectional DC / DC conversion module, and the second bidirectional DC / DC conversion module are electrically connected to the main control board; the bidirectional AC / DC conversion module is electrically connected to the municipal power supply, and the bidirectional AC / DC conversion module is electrically connected to the second bidirectional DC / DC conversion module through a second power bus; the second bidirectional DC / DC conversion module is electrically connected to the first power bus; the first bidirectional DC / DC conversion module is electrically connected to the storage battery, and the first bidirectional DC / DC conversion module is electrically connected to the second bidirectional DC / DC conversion module through the second power bus.

3. The control system of claim 2, wherein, The bidirectional AC / DC conversion module is electrically connected to the municipal power supply through an LC filter and an AC filter in sequence.

4. The control system of claim 1, wherein, The main control box further has a brightness sensor fixedly installed therein for sensing the brightness of the surrounding environment, and the brightness sensor is electrically connected to the main control board.

5. The control system of claim 1, wherein, The main control board is further electrically connected to a signal transmission module for wireless connection to a cloud server.

6. The control system of claim 1, wherein, The main control board is an MCU chip.

7. The control system of claim 1, wherein, The first power bus is electrically connected to the lamp bodies through a driver.

8. The control system of claim 1, wherein, Each of the photovoltaic panels and the lamp bodies is electrically connected to the first power bus through a diode.

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