Photovoltaic street lamp system
By designing a photovoltaic street lamp system including photovoltaic panels, inverter units, gate units and control units, the problems of high cost and difficulty in maintenance of traditional solar street lamps are solved, automatic switching and high reliability of the system are realized, and system costs are reduced.
Patent Information
- Application Number
- CN202323480775.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-19
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2033-12-19
AI Technical Summary
The initial investment cost of traditional solar street lights is high and maintenance and management is difficult.
A photovoltaic street lamp system is designed, which includes photovoltaic panels, inverter units, gate units, control units and street lamps. By switching between the inverter unit and the power grid, the grid-connected use of the photovoltaic panel power is realized; the connection of the gate unit is automatically switched through the control unit during different time periods to realize normal lighting of the street lights.
Automatic switching of photovoltaic street light systems is realized, reducing the chance of system failure, improving system reliability and energy utilization, and reducing system costs.
Smart Images
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Abstract
Description
Technical Field
[0001] The embodiment of the utility model relates to the technical field of photovoltaics, and in particular to a photovoltaic street lamp system. Background Art
[0002] Solar street lights usually involve research and innovation in multiple fields such as solar cell technology, energy storage technology, and control systems. By improving the efficiency of solar cells, reducing costs, increasing energy storage capacity, and improving control systems, the performance and reliability of solar street lights have been continuously improved, and they have gradually become an important choice for urban road lighting. Among the related technologies, traditional solar street lights have high initial investment costs and are difficult to maintain and manage. Utility Model Content
[0003] The utility model provides a photovoltaic street lamp system, which can realize automatic switching of working states, can better meet different application requirements, improve system reliability and reduce system costs.
[0004] In order to solve the above technical problems, the embodiment of the utility model provides a photovoltaic street light system, characterized in that it includes at least one photovoltaic street light unit, and the photovoltaic street light unit includes a photovoltaic panel, an inverter unit, a gating unit, a control unit and at least one street light;
[0005] The output end of the photovoltaic panel is connected to the input end of the inverter unit, the output end of the inverter unit is connected to the first end of the gating unit, the second end of the gating unit is connected to the at least one street lamp, the third end of the gating unit is connected to the power grid, and the control end of the gating unit is connected to the control unit; the inverter unit is used to invert the direct current provided by the photovoltaic panel into alternating current; the control unit is used to control the first end of the gating unit to be connected to the third end in a first time period, and control the second end of the gating unit to be connected to the third end in a second time period.
[0006] Optionally, the selection unit includes a dual-way switching switch; the first end of the first switch in the dual-way switching switch is connected to the output end of the inverter unit, the first end of the second switch in the dual-way switching switch is connected to the at least one street lamp, the second end of the first switch and the second end of the second switch are connected to the power grid, and the control end of the dual-way switching switch is connected to the control unit.
[0007] Optionally, the gating unit further includes an anti-short circuit module, and the anti-short circuit module is arranged between the first switch and the second switch.
[0008] Optionally, the inversion unit includes an inverter; an input end of the inverter is connected to an output end of the photovoltaic panel, and an output end of the inverter is connected to a first end of the gating unit.
[0009] Optionally, the control unit is connected to a control end of the inverter, and the control unit is further configured to control a state of the inverter according to a time period.
[0010] Optionally, the first time period includes a first hour time period and a first month time period; the second time period includes a second hour time period and a second month time period, the time within the first hour time period and the time within the second hour time period are different times within the 24 hours of a day, and the month within the first month time period and the month within the second month time period are different months within the 12 months of a year.
[0011] Optionally, the second end of the gating unit is connected to one of the street lamps.
[0012] Optionally, the photovoltaic street light system further comprises a first cable, and the third end of the gating unit is connected to the power grid via the first cable.
[0013] Optionally, the photovoltaic street light system further includes a second cable, and the inverter unit is connected to the first end of the gating unit via the second cable.
[0014] Optionally, the photovoltaic street lamp system further comprises a third cable, and the at least one street lamp is connected to the second end of the gating unit via the third cable.
[0015] The utility model connects a gating unit between an inverter unit, a power grid and a street lamp, and in the first time period of the gating unit, the control unit controls the gating unit to gating the inverter unit and the power grid, so that the electric energy provided by the photovoltaic panel is fed back to the power grid after the inversion action of the inverter unit, thereby realizing the grid connection of the photovoltaic panel and ensuring the utilization rate of light energy. In the second time period of the gating unit, the control unit controls the gating unit to gating the street lamp and the power grid, so that the power grid supplies power to the street lamp, thereby realizing the normal use of the street lamp. In the above process, the control unit automatically controls the action of the gating unit according to time, and the gating unit realizes the automatic switching of the photovoltaic street lamp system, thereby reducing the probability of system failure, improving the reliability of system operation, and reducing system cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 A schematic diagram of the structure of a photovoltaic street light system provided by an embodiment of the utility model;
[0017] Figure 2 A schematic diagram of the structure of another photovoltaic street light system provided by an embodiment of the utility model;
[0018] Figure 3 A schematic structural diagram of another photovoltaic street light system provided in an embodiment of the utility model. DETAILED DESCRIPTION
[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0020] Figure 1 A schematic diagram of a photovoltaic street light system provided by the present utility model, referring to Figure 1 The photovoltaic street light system provided in this embodiment includes at least one photovoltaic street light unit, which includes a photovoltaic panel 1, an inverter unit 2, a gating unit 3, a control unit 100 and at least one street light 4. The output end of the photovoltaic panel 1 is connected to the input end of the inverter unit 2, the output end of the inverter unit 2 is connected to the first end of the gating unit 3, the second end of the gating unit 3 is connected to at least one street light 4, the third end of the gating unit 3 is connected to the power grid 200, the control end of the gating unit 3 is connected to the control unit 100, the inverter unit 2 is used to invert the direct current provided by the photovoltaic panel 1 into alternating current, and the control unit 100 is used to control the first end of the gating unit 3 to be connected to the third end in a first time period, and control the second end of the gating unit 3 to be connected to the third end in a second time period.
[0021] Specifically, the photovoltaic panel 1 is used to generate direct current based on solar energy, the inverter unit 2 is used to convert the direct current generated by the photovoltaic panel 1 into alternating current, and the selection unit 3 is respectively connected to the inverter unit 2, the power grid 200 and the street lamp 4. Specifically, the inverter unit 2 and the power grid 200 are respectively connected to the first end and the third end of the selection unit 3, the street lamp 4 is connected to the second end of the selection unit 3, and the first end and the third end, as well as the second end and the third end of the selection unit 3 are not turned on at the same time. The control unit 100 can determine the working state of the photovoltaic street light system according to the first time period or the second time period, and control the power grid 200 to be connected with the inverter unit 2 or the street light 4. When the selection unit 3 is in the first time period, the control unit 100 controls the first end of the selection unit 3 to be closed, and the first end is connected to the third end. The inverter unit 2 is connected to the power grid 200 under the control of the control unit 100, so that the electric energy provided by the photovoltaic panel 1 is fed back to the power grid 200 through the inverter unit 2, thereby realizing that the photovoltaic panel 1 supplies power to the power grid 200 in the first time period; when the selection unit 3 is in the second time period, the control unit 100 triggers the selection unit 3 to switch to another path, the second end of the selection unit 3 is closed, and the second end is connected to the third end, and the street light 4 is connected to the power grid under the control of the control unit 100, so that the street light 4 is powered by the mains, thereby realizing that the street light 4 can be used normally in the second time period.
[0022] Optionally, the control steps performed by the control unit 100 are as follows: when the system starts, the control unit 100 will initialize the time control mode, including a preset light-on time and a light-off time; based on the preset light-on time and the light-off time, and the current system time, determine whether the time control mode switching conditions are met, for example, when the system time reaches the preset light-off time, the control unit 100 will trigger the gating unit 3 to switch to another power supply; when the time control mode switching conditions are met, the control unit 100 switches by controlling the gating unit 3; after switching to another power supply, the control unit 100 will monitor the voltage, current and other states of the other power supply to ensure its normal operation; based on the monitored state of the other power supply and the current system time, determine whether the time control mode switching conditions are met, for example, when the system time reaches the preset light-on time again, the control unit 100 will trigger the gating unit 3 to switch back to the original power supply; when the time control mode switching conditions are met, the control unit switches back by controlling the gating unit 3.
[0023] When the control unit 100 is performing control, any one or several of the above-mentioned operation steps are performed, which are selected according to the specific embodiment, and the order of the above-mentioned operation steps is not limited.
[0024] The technical solution provided by the utility model is to connect the selection unit 3 between the inverter unit 2, the power grid 200 and the street lamp 4, and the control unit 100 determines the working state of the photovoltaic street lamp system according to the first time period or the second time period, and conducts the third end of the selection unit 3 with the first end or the third end with the second end according to the working state, so that the inverter unit 2 or the street lamp 4 is connected to the power grid 200, so as to realize the intelligent control of the photovoltaic street lamp system. For example, in the first time period, the control unit connects the inverter unit 2 with the power grid 200 according to the time, and the AC power can be supplied to the power grid 200; in the second time period, the control unit connects the power grid 200 with the street lamp 4 according to the time, so that the mains can supply power to the street lamp 4. This design can make full use of solar power generation and realize intelligent management, improve energy utilization efficiency, and has a clear system structure and stable and reliable operation.
[0025] Figure 2 A schematic diagram of another photovoltaic street light system provided by the present utility model, referring to Figure 2 This embodiment includes two photovoltaic street light units. On the basis of the above embodiment, optionally, the selection unit 3 includes a dual-way switching switch DW1, a first end 311 of a first switch 31 in the dual-way switching switch DW1 is connected to the output end of the inverter unit 2, a first end 321 of a second switch 32 in the dual-way switching switch DW1 is connected to at least one street light 4, a second end 312 of the first switch 31 and a second end 322 of the second switch 32 are connected to the power grid 200, and a control end of the dual-way switching switch DW1 is connected to the control unit 100.
[0026] Among them, the dual-way switching switch DW1 is used for switching between two different circuits to meet different work requirements and is more convenient. The first switch 31 in the dual-way switching switch DW1 is used to control the connection between the inverter unit 2 and the power grid 200, and the second switch 32 in the dual-way switching switch DW1 is used to control the connection between the street lamp 4 and the power grid 200. The first ends of the first switch 31 and the second switch 32 in the dual-way switching switch DW1 are not closed at the same time. Exemplarily, when the first switch 31 in the dual-way switching switch DW1 is closed, the inverter unit 2 is connected to the power grid 200, and the photovoltaic street lamp system supplies power to the power grid 200; when the second switch 32 in the dual-way switching switch DW1 is closed, the power grid 200 is connected to the street lamp 4, and the photovoltaic street lamp system supplies power to the street lamp.
[0027] Optionally, the gating unit 3 further includes an anti-short circuit module 330 , and the anti-short circuit module 330 is disposed between the first switch 31 and the second switch 32 .
[0028] The anti-short circuit module 330 is used to separate the first ends of the first switch 31 and the second switch 32 in the dual-way switching switch DW1 to prevent the two switches from being short-circuited together, thereby reducing damage or danger caused by short circuit. A physical short circuit prevention method is used here, including but not limited to the use of insulating sleeves or insulating tapes or insulating gaskets or insulating washers or insulating terminals, etc., which are not limited here.
[0029] Specifically, Figure 2 As shown, when the control unit 100 determines the working state of the photovoltaic street light system according to the preset light-on time and light-off time and the current system time, if the control unit 100 determines that the light is off (recorded as daytime) according to the preset time and the current system time, the control unit 100 first detects the input and output states of the inverter unit 2, including its input voltage and output current, to determine whether the inverter unit 2 is working normally. When the inverter unit 2 is working normally, the input end of the inverter unit 2 is connected to the output end of the photovoltaic panel 1 to convert the electrical energy of the photovoltaic panel 1 into alternating current, and the dual-way switch is turned on. The first end 311 of the first switch 31 in the switch DW1 is connected to the output end of the inverter unit 2, and the second end 312 of the first switch 31 in the dual-way switching switch DW1 is connected to the power grid 200. When the control unit 100 controls the first end 311 of the first switch 31 in the dual-way switching switch DW1 to be closed, the inverter unit 2 is connected to the power grid 200, so that the photovoltaic street light system supplies power to the power grid 200 during the day; when the inverter unit 2 works abnormally, the control unit 100 makes a judgment through communication control with the inverter unit 2 and outputs an abnormal signal to the control unit 100.
[0030] The function of communication control is to manage and maintain communication equipment, ensure the normal operation and service life of the equipment, and improve the reliability and stability of the communication system.
[0031] When the control unit 100 meets the time control mode switching conditions, the control unit 100 switches by controlling the dual-way switching switch DW1, and after switching to another power supply, the control unit 100 monitors the voltage, current and other states of the other power supply to ensure its normal operation.
[0032] When the control unit 100 determines that the light is on (recorded as night) according to the preset time and the current system time, the power grid 200, the two-way switch DW1 and the circuit of the street light 4 are working normally under the detection of the control unit 100, and the first end 321 of the second switch 32 in the two-way switch DW1 is closed under the control of the control unit 100, and the street light 4 is connected to the power grid 200, so that the photovoltaic street light system supplies power to the street light 4 with the mains at night; when the power grid 200, the two-way switch DW1 and the circuit of the street light 4 are working abnormally under the detection of the control unit 100, the two-way switch DW1 makes a judgment through the communication control between the control unit 100 and outputs the abnormal signal to the control unit 100.
[0033] The technical solution provided by the utility model is that the control unit 100 closes the first end of the first switch 31 or the second switch 32 in the dual-way switch DW1 according to the preset time and the current system time, and the first ends of the two switches are not closed at the same time. When the first end 311 of the first switch 31 in the dual-way switch DW1 is closed according to the control of the control unit 100, and the control unit 100 detects that the inverter unit 2 is working normally, the output end of the photovoltaic panel 1 is connected to the input end of the inverter unit 2, and the output end of the inverter unit 2 is connected to the first switch 31 in the dual-way switch DW1. The first end 311 of the first switch 31 in the dual-way switching switch DW1 is connected, and the second end 312 of the first switch 31 in the dual-way switching switch DW1 is connected to the power grid 200, so that the photovoltaic street light system enables the photovoltaic panel 1 to supply power to the power grid 200 through the inverter unit 2 at a preset time. When the first end 321 of the second switch 32 in the dual-way switching switch DW1 is closed according to the control of the control unit 100, the second end 322 of the second switch 32 in the dual-way switching switch DW1 is connected to the power grid 200, so that the street light 4 is supplied with power by the mains, so that the photovoltaic street light system supplies power to the street light 4 through the mains at a preset time. The selection unit 3 realizes various working states of the photovoltaic street light system, and can be flexibly adjusted according to actual needs to achieve energy saving, improve safety and extend life. The control unit has a communication control function, which can improve the reliability of the system.
[0034] Figure 3 A schematic diagram of another photovoltaic street light system provided by the present utility model, referring to Figure 3 This embodiment includes multiple photovoltaic street light units. Based on the above embodiments, optionally, the inverter unit 2 includes an inverter N1, the input end of the inverter N1 is connected to the output end of the photovoltaic panel 1, and the output end of the inverter N1 is connected to the first end of the gating unit 3.
[0035] The function of the inverter N1 is to convert the electric energy absorbed by the photovoltaic panel 1 into alternating current.
[0036] Optionally, the control unit 100 is connected to a control terminal of the inverter N1 , and the control unit 100 is further configured to control a state of the inverter N1 according to a time period.
[0037] Specifically, the control unit 100 controls the state of the inverter N1 according to a preset time and detects the state of the inverter N1. The control unit 100 determines whether its working state is normal by detecting the input and output states of the photovoltaic inverter, including its input voltage, output current, etc.
[0038] Optionally, the first time period includes a first hour time period and a first month time period, and the second time period includes a second hour time period and a second month time period. The time within the first hour time period and the time within the second hour time period are different times within the 24 hours of a day, and the month within the first month time period and the month within the second month time period are different months within the 12 months of a year.
[0039] Specifically, the first hour time period and the second hour time period are respectively the time periods between the initial time determined as daytime by the control unit 100 and the initial time determined as nighttime by the control unit 100. For example, the time period from daytime to nighttime (recorded as daytime) can be recorded as the first hour time period, and the time period from nighttime to the next daytime (recorded as nighttime) can be recorded as the second hour time period; the first month time period and the second month time period correspond to the first hour time period and the second hour time period, respectively, and the first month time period is different from the second month time period. The control unit 100 automatically controls the dual-way switch DW1 according to the preset time and the current state of the system, and the preset time is controlled according to the different daytime and nighttime times in different months of the year.
[0040] Optionally, the second end of the gating unit 3 is connected to a street lamp 4 .
[0041] The second end of the gating unit 3 is connected to the street lamp 4 for individually controlling the mains to supply power to each street lamp.
[0042] Optionally, the photovoltaic street lamp system further includes a first cable 51 , and the third end of the gating unit 3 is connected to the power grid 200 via the first cable 51 .
[0043] The first cable 51 is a part of the original cable. The original cable is a cable used when the mains electricity is used alone to power the street lamp. Reusing the original cable can reduce system costs.
[0044] Optionally, the photovoltaic street lamp system further includes a second cable 52 , and the inverter unit 2 is connected to the first end of the gating unit 3 via the second cable 52 .
[0045] The first end of the gating unit 3 is connected to the second cable 52 for the inverter N1 to supply power to the grid 200, and the first cable 51 can be reused, thereby reducing system costs.
[0046] Optionally, the photovoltaic street lamp system further includes a third cable 53 , and at least one street lamp 4 is connected to the second end of the gating unit 3 via the third cable 53 .
[0047] The third cable 53 is another part of the original cable. Reusing the original cable can reduce system cost.
[0048] Specifically, Figure 3 As shown, the input end of the inverter N1 is connected to the output end of the photovoltaic panel 1, the first end of the gating unit 3 is connected to the output end of the inverter N1, the control unit 100 is connected to the control end of the inverter N1, and the control unit 100 detects the state of the inverter N1 according to the preset time, and then controls the inverter N1. If the control unit 100 determines that it is the first hour time period (daytime) and the first month time period according to the preset time and the current system time, the control unit 100 controls the first end of the gating unit 3 to be closed, the first end and the third end are connected, the second end is disconnected, and the control unit 100 controls the first end of the gating unit 3 to be closed, the first end and the third end are connected, and the second end is disconnected, and the control unit 100 detects the state of the inverter N1 according to the preset time and the current system time. The unit 100 determines whether the inverter N1 is working normally by judging the input voltage and output current of the inverter N1. When the inverter N1 is working normally, the output end of the inverter N1 is connected to the first end of the selection unit 3. The inverter N1 converts the light energy absorbed by the photovoltaic panel 1 into alternating current through the first end and the third end of the selection unit 3, and supplies power to the power grid 200 through the second cable 52 and the first cable 51. When the inverter unit 2 works abnormally, the control unit 100 makes a judgment through the communication control with the inverter unit 2 and outputs an abnormal signal to the control unit 100.
[0049] If the control unit 100 determines that it is the second hour time period (evening) and the second month time period according to the preset time and the current system time, the control unit will trigger the selection unit to switch to another switch, the first end of the selection unit 3 is disconnected, and the second end is closed. The control unit 100 pre-detects whether the connection loop of the second end of the selection unit 3 is working normally. When the loop is working normally, the second end of the selection unit 3 is connected to the street lamp 4, the first cable 51 is connected to the third end of the selection unit 3, and the street lamp 4 is connected to the third cable 53. The city power is supplied to the street lamp 4 through the first cable 51, the first end of the selection unit 3 and the third cable 53, so that the street lamp 4 is lit at night. When the loop works abnormally, the control unit 100 makes a judgment through the communication control with the selection unit 3 and outputs the abnormal signal to the control unit 100.
[0050] The technical solution provided by this embodiment is that the control unit 100 controls the working state of the photovoltaic street light system through the preset time, and the preset time is related to the month. When the control unit 100 determines that it is daytime and the first month time period according to the preset time and the current system time, the photovoltaic street light system supplies power to the power grid 200 through the inverter N1, thereby achieving the effect of energy saving and reducing energy consumption. When the control unit 100 determines that it is nighttime and the second month time period according to the preset time and the current system time, the photovoltaic street light system supplies power to the street light 4 through the mains, thereby improving the lighting brightness and safety. The solution can also realize automatic switching of the working state through the detection of the preset time and the control unit 100, thereby improving the convenience of use, and the mains side directly reuses the original cables (the first cable 51 and the third cable 53), without the need to dismantle and restore the road surface, pre-buried pipelines, etc., thereby reducing the system cost.
[0051] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims
1. A photovoltaic street light system, characterized in that: It comprises at least one photovoltaic street light unit, wherein the photovoltaic street light unit comprises a photovoltaic panel, an inverter unit, a gating unit, a control unit and at least one street light; The output end of the photovoltaic panel is connected to the input end of the inverter unit, the output end of the inverter unit is connected to the first end of the gating unit, the second end of the gating unit is connected to the at least one street lamp, the third end of the gating unit is connected to the power grid, and the control end of the gating unit is connected to the control unit; the inverter unit is used to invert the direct current provided by the photovoltaic panel into alternating current; the control unit is used to control the first end of the gating unit to be connected to the third end in a first time period, and control the second end of the gating unit to be connected to the third end in a second time period.
2. The photovoltaic street light system according to claim 1, characterized in that: The selection unit includes a dual-way switching switch; the first end of the first switch in the dual-way switching switch is connected to the output end of the inverter unit, the first end of the second switch in the dual-way switching switch is connected to the at least one street lamp, the second end of the first switch and the second end of the second switch are connected to the power grid, and the control end of the dual-way switching switch is connected to the control unit.
3. The photovoltaic street light system according to claim 2, characterized in that: The gating unit further includes an anti-short circuit module; the anti-short circuit module is arranged between the first switch and the second switch.
4. The photovoltaic street light system according to claim 1, characterized in that: The inversion unit comprises an inverter; the input end of the inverter is connected to the output end of the photovoltaic panel, and the output end of the inverter is connected to the first end of the gating unit.
5. The photovoltaic street light system according to claim 4, characterized in that: The control unit is connected to the control end of the inverter, and the control unit is also used to control the state of the inverter according to a time period.
6. The photovoltaic street light system according to claim 1, characterized in that: The first time period includes a first hour time period and a first month time period; the second time period includes a second hour time period and a second month time period; The time within the first hour time period and the time within the second hour time period are different times within 24 hours of a day, and the month within the first month time period and the month within the second month time period are different months within 12 months of a year.
7. The photovoltaic street light system according to claim 1, characterized in that: The second end of the gating unit is connected to one of the street lamps.
8. The photovoltaic street light system according to claim 1, characterized in that: It also includes a first cable, and the third end of the gating unit is connected to the power grid through the first cable.
9. The photovoltaic street light system according to claim 1, characterized in that: A second cable is also included, and the inverter unit is connected to the first end of the gating unit through the second cable.
10. The photovoltaic street light system according to claim 1, characterized in that: A third cable is also included, and the at least one street lamp is connected to the second end of the gating unit via the third cable.