Household intelligent photovoltaic detection device and detection method thereof

Abstract

The application relates to a household intelligent photovoltaic detection device, which comprises a photovoltaic panel, an inverter, a grid-connected distribution box, a grid-connected electric meter, a household electric meter and a maintenance device; the grid-connected distribution box is provided with a distribution switch; the grid-connected electric meter is provided with a grid-connected switch; the household electric meter is provided with a household switch; the maintenance device is provided with a first collection line, a second collection line and a third collection line, the first collection line is electrically connected with an electricity inlet end of the household switch, the second collection line is electrically connected with an electricity outlet end of the grid-connected switch, and the third collection line is electrically connected with an electricity inlet end of the distribution switch; the maintenance device comprises a shell, a circuit board, a maintenance electric meter and a central control board; the circuit board is provided with a voltage collection element, an energy storage element and a communication element. The household intelligent photovoltaic detection device can quickly judge the fault position, and the communication element is arranged to realize the quick transmission of fault information, so that the user can accurately know the fault position in the first time when a fault occurs, and the maintenance efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic power supply system technology, and in particular to a household intelligent photovoltaic testing device and its testing method. Background Technology

[0002] Photovoltaic power supply converts solar energy (light radiation) into electrical energy for human use. Therefore, compared to other power supply methods, photovoltaic power supply is more energy-efficient and environmentally friendly, possessing advantages and promising development prospects. Residential photovoltaic power supply uses photovoltaic panels to convert sunlight into electricity, which, in conjunction with grid electricity, supplies the household's needs. When photovoltaic power generation is sufficient, the household uses photovoltaic power to meet its daily needs; any excess photovoltaic power can be used to charge the grid. When photovoltaic power generation is insufficient, the household relies on grid electricity for its daily needs, significantly reducing the user's electricity costs.

[0003] In residential photovoltaic power supply systems, the main source of failure during use is the switching components. There are multiple switching components throughout the system, including those in the grid-connected distribution box and the grid-connected meter. When these components are damaged, they need to be replaced or repaired. However, when the switching components inside the household meter are damaged, the power supply company must be contacted for repair and replacement. This makes it difficult to quickly identify the faulty component when a fault occurs. Often, after the manufacturer's fault detection, it is found that the fault lies with the power supply company's household meter, requiring further contact with the power supply company's maintenance personnel for repairs, which seriously affects maintenance efficiency. Summary of the Invention

[0004] Therefore, it is necessary to provide a household intelligent photovoltaic testing device and its testing method to address the problem of poor maintenance efficiency.

[0005] A household smart photovoltaic testing device, comprising:

[0006] Photovoltaic panels;

[0007] The inverter is electrically connected to the photovoltaic panel;

[0008] A grid-connected distribution box is electrically connected to the inverter; a power distribution switch is installed inside the grid-connected distribution box.

[0009] A grid-connected electricity meter is electrically connected to the grid-connected distribution box; a grid-connected switch is installed inside the grid-connected electricity meter;

[0010] The incoming electricity meter is connected in parallel with the grid-connected electricity meter; the incoming electricity meter is equipped with an incoming switch; and

[0011] The maintenance unit is connected to both the grid-connected electricity meter and the household electricity meter. The maintenance unit is equipped with a first acquisition line, a second acquisition line, and a third acquisition line. The first acquisition line is electrically connected to the power input terminal of the household switch, the second acquisition line is electrically connected to the power input terminal of the grid-connected switch, and the third acquisition line is electrically connected to the power input terminal of the distribution switch. The maintenance unit includes a housing, a circuit board housed within the housing, a maintenance electricity meter electrically connected to the circuit board, and a central control board electrically connected to the circuit board. The circuit board is equipped with voltage acquisition elements, energy storage elements, and communication elements. The grid-connected electricity meter and the household electricity meter are connected in parallel to the maintenance electricity meter.

[0012] The aforementioned household intelligent photovoltaic detection device samples the voltage of the inlet switch, grid-connected switch, and distribution switch by setting up a first acquisition line, a second acquisition line, and a third acquisition line, respectively. In conjunction with the working status of the maintenance meter, it can quickly determine the location of the fault. Furthermore, by setting up communication elements, it can quickly transmit fault information. When a fault occurs, the user can know the location of the fault accurately at the first time, thereby improving maintenance efficiency.

[0013] In one embodiment, the inverter is provided with a signal transmitting element that transmits data from the photovoltaic panel to the communication element.

[0014] In one embodiment, the voltage acquisition element is connected to the first acquisition line, the second acquisition line and the third acquisition line respectively, and the voltage acquisition element is connected to the central control board.

[0015] In one embodiment, the maintenance meter is connected to the central control board, and the central control board is electrically connected to the communication element.

[0016] In one embodiment, the circuit board is provided with a rectifier element, which is electrically connected to the household electricity meter.

[0017] In one embodiment, the energy storage element is connected to the rectifier element; the circuit board is also provided with a switching element and a voltage regulator element.

[0018] In one embodiment, the switching element is connected to the energy storage element and is disposed on the side of the energy storage element away from the rectifier element; the voltage regulator element is connected to the switching element and is disposed on the side of the switching element away from the energy storage element.

[0019] In one embodiment, two voltage regulators are provided, and the two voltage regulators are respectively connected to the communication element and the central control board.

[0020] In one embodiment, the circuit board and the central control board are arranged side by side in the housing, and the maintenance meter is arranged on one side of the circuit board.

[0021] A testing method for a residential smart photovoltaic testing device includes:

[0022] The voltage acquisition element acquires the voltage signals of the first acquisition line, the second acquisition line, and the third acquisition line, respectively.

[0023] The voltage acquisition element transmits the acquired voltage signal to the central control board;

[0024] The central control board collects electrical signals from the maintenance meters;

[0025] The central control board determines the working status of the household smart photovoltaic detection device;

[0026] When the first acquisition line has a voltage signal, the second acquisition line has a voltage signal, the third acquisition line has a voltage signal, and the maintenance meter has an electrical signal, it is determined that the system is working normally.

[0027] When there is no voltage signal on the first acquisition line, no voltage signal on the second acquisition line, no voltage signal on the third acquisition line, and no power signal on the maintenance meter, it is determined that the mains power is out.

[0028] When the first acquisition line has a voltage signal, the second acquisition line has no voltage signal, the third acquisition line has no voltage signal, and the maintenance meter has no power signal, the inlet switch is determined to be faulty.

[0029] When the first acquisition line has a voltage signal, the second acquisition line has no voltage signal, the third acquisition line has no voltage signal, and the maintenance meter has an electrical signal, the grid connection switch is determined to be faulty.

[0030] When the first acquisition line has a voltage signal, the second acquisition line has a voltage signal, the third acquisition line has no voltage signal, and the maintenance meter has an electrical signal, the power distribution switch is determined to be faulty.

[0031] The central control board transmits the judgment result to the communication element;

[0032] The communication element transmits the results to the mobile terminal.

[0033] The aforementioned testing method for residential smart photovoltaic testing devices allows for rapid assessment of the device's operational status via a central control board. This assessment is then transmitted to a mobile terminal via communication components, enabling users to quickly view the device's status and ensuring rapid, targeted repairs in case of malfunctions, thereby improving repair efficiency. Attached Figure Description

[0034] Figure 1This is a schematic diagram of the structure of a household intelligent photovoltaic detection device according to an embodiment of the present invention;

[0035] Figure 2 for Figure 1 A schematic diagram of the internal structure of the aforementioned maintenance device;

[0036] Figure 3 for Figure 1 An enlarged view of part A in the middle circle;

[0037] Figure 4 This is a flowchart of the testing method for residential smart photovoltaic testing devices.

[0038] The meanings of the numbers in the attached diagram are as follows:

[0039] 100. Household intelligent photovoltaic detection device;

[0040] 10. Photovoltaic panels;

[0041] 20. Inverter;

[0042] 30. Grid-connected distribution box; 35. Distribution switch;

[0043] 40. Grid-connected meter; 45. Grid-connected switch;

[0044] 50. Incoming electricity meter; 55. Incoming switch;

[0045] 60. Maintenance device; 61. First acquisition line; 62. Second acquisition line; 63. Third acquisition line; 65. Housing; 66. Circuit board; 661. Voltage acquisition element; 662. Energy storage element; 663. Communication element; 664. Rectifier element; 665. Switching element; 666. Voltage regulator element; 67. Maintenance meter; 68. Central control board; 69. Antenna;

[0046] 90. Power grid; 95. Electrical equipment. Detailed Implementation

[0047] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0053] Please see Figures 1 to 3 The household intelligent photovoltaic detection device 100 according to one embodiment of the present invention includes a photovoltaic panel 10, an inverter 20 electrically connected to the photovoltaic panel 10, a grid-connected distribution box 30 electrically connected to the inverter 20, a grid-connected electricity meter 40 electrically connected to the grid-connected distribution box 30, an incoming electricity meter 50 connected in parallel with the grid-connected electricity meter 40, and an operation and maintenance device 60 respectively connected to the grid-connected electricity meter 40 and the incoming electricity meter 50; the household intelligent photovoltaic detection device 100 is used to connect to the external mains power to realize the daily electricity needs of the household by supplying both mains power and photovoltaic power generation.

[0054] The photovoltaic panel 10 is arranged in a rectangular straight plate structure. The photovoltaic panel 10 is installed outdoors and is used to convert solar energy into electrical energy to meet the electricity needs of households.

[0055] Inverter 20 is electrically connected to photovoltaic panel 10. Inverter 20 is generally rectangular in shape. It converts the direct current (DC) generated by photovoltaic panel 10 into alternating current (AC) to ensure power supply. In a grid-connected system, inverter 20 disconnects the photovoltaic power supply circuit during mains power outages, preventing the photovoltaic system from operating independently and posing a risk of electric shock to mains power maintenance personnel. Furthermore, inverter 20 includes a signal transmitting element (not shown) to transmit the photovoltaic power generation data from photovoltaic panel 10 to the cloud, allowing users to view the photovoltaic power generation data in real time.

[0056] The grid-connected distribution box 30 is electrically connected to the inverter 20. Located on one side of the inverter 20, the distribution box 30 controls the connection status of the AC power generated by the inverter 20 to protect the overall equipment. Furthermore, the distribution box 30 includes a power distribution switch 35 for overcurrent protection of the photovoltaic power generation AC circuit.

[0057] The grid-connected meter 40 is electrically connected to the grid-connected distribution box 30. The grid-connected meter 40 is located on the side of the grid-connected distribution box 30 away from the inverter 20. The grid-connected meter 40 is used to measure the amount of electricity generated by the photovoltaic power generation. Furthermore, the grid-connected meter 40 is equipped with a grid-connected switch 45, which is used to provide overcurrent protection for the grid-connected meter 40.

[0058] The incoming electricity meter 50 is connected in parallel with the grid-connected meter 40. The incoming electricity meter 50 is located on the side of the grid-connected meter 40 away from the grid-connected distribution box 30. The incoming electricity meter 50 is connected to the external power grid 90 and is used to measure the amount of electricity used from the mains. Furthermore, the incoming electricity meter 50 is equipped with an incoming switch 55, which is used to provide overcurrent protection for the incoming electricity meter 50.

[0059] The maintenance unit 60 is connected to the grid-connected meter 40 and the household meter 50. Photovoltaic power generation and mains power are transmitted to the user's electrical equipment 95 through the maintenance unit 60 to ensure the household's electricity needs. The maintenance unit 60 is equipped with a first acquisition line 61, a second acquisition line 62, and a third acquisition line 63. The first acquisition line 61 is electrically connected to the power input terminal of the household switch 55 to acquire the voltage signal from the power input terminal of the household switch 55 into the maintenance unit 60. The second acquisition line 62 is electrically connected to the power input terminal of the grid-connected switch 45 to acquire the voltage signal from the power input terminal of the grid-connected switch 45 into the maintenance unit 60. The third acquisition line 63 is electrically connected to the power input terminal of the distribution switch 35 to acquire the voltage signal from the power input terminal of the distribution switch 35 into the maintenance unit 60.

[0060] The maintenance device 60 includes a housing 65, a circuit board 66 disposed within the housing 65, a maintenance meter 67 electrically connected to the circuit board 66, and a central control board 68 electrically connected to the circuit board 66. The housing 65 has a hollow rectangular structure and is fixed to the outside. The circuit board 66 has a rectangular straight plate structure and is fixed inside the housing 65. The circuit board 66 is used to carry the overall circuit. The maintenance meter 67 is located on one side of the circuit board 66. The grid-connected meter 40 and the household meter 50 are connected in parallel to the maintenance meter 67. The maintenance meter 67 is electrically connected to the user's electrical equipment 95 and is used to measure the user's electricity consumption. The central control board 68 has a rectangular straight plate structure and is arranged in parallel with the circuit board 66 inside the housing 65. The central control board 68 is used to calculate the working status of the household smart photovoltaic detection device 100. The central control board 68 is connected to the maintenance meter 67 to collect the electricity signal of the maintenance meter 67.

[0061] The circuit board 66 is equipped with a voltage acquisition element 661, an energy storage element 662, and a communication element 663. The voltage acquisition element 661 has a rectangular block structure and is connected to the first acquisition line 61, the second acquisition line 62, and the third acquisition line 63. It is also connected to the central control board 68. The voltage acquisition element 661 transmits the voltage signals from the first acquisition line 61, the second acquisition line 62, and the third acquisition line 63 to the central control board 68 for analysis and calculation. The energy storage element 662 has a cylindrical structure and provides the power required for the operation of the maintenance unit 60. The communication element 663 also has a rectangular block structure. The signal transmitting element within the inverter 20 transmits the data from the photovoltaic panel 10 to the communication element 663. The communication element 663 is electrically connected to the central control board 68 to ensure that the central control board 68 analyzes the data signals from the photovoltaic panel 10 and transmits the results of calculating the operating status of the household intelligent photovoltaic detection device 100 through the communication element 663. Understandably, there is no specific limitation on the data transmission method between the signal transmitting element and the communication element 663. The data transmission method between the signal transmitting element and the communication element 663 can be one of signal line connection transmission, Bluetooth wireless transmission, or cloud transmission.

[0062] Furthermore, the circuit board 66 is provided with a rectifier element 664, which is electrically connected to the household electricity meter 50. The rectifier element 664 is arranged in a rectangular structure and is connected to the energy storage element 662 to rectify the AC mains power supplied by the household electricity meter 50 into the DC power required by the energy storage element 662. Furthermore, the circuit board 66 also includes a switching element 665 and a voltage regulator element 666. The switching element 665 has a rectangular structure and is located on the side of the energy storage element 662 away from the rectifier element 664. The switching element 665 is connected to the energy storage element 662 and is used to perform a first voltage reduction process on the voltage output by the energy storage element 662, stabilizing voltage fluctuations and ensuring power supply stability. The voltage regulator element 666 is connected to the switching element 665 and is located on the side of the switching element 665 away from the energy storage element 662. The voltage regulator element 666 is used to perform a second voltage reduction process on the voltage supplied by the switching element 665 to meet the voltage value required for the operation of the maintenance device 60. In this embodiment, two voltage regulator elements 666 are provided, and the two voltage regulator elements 666 are respectively connected to the communication element 663 and the central control board 68 to ensure that the communication element 663 and the central control board 68 are powered separately. In this embodiment, an antenna 69 is provided on the housing 65. The antenna 69 is connected to the communication element 663. The antenna 69 is used to amplify the communication transmission signal, thereby improving the transmission efficiency.

[0063] Please see Figure 4The present invention also provides a detection method for a household intelligent photovoltaic detection device 100, comprising:

[0064] S1: Voltage acquisition element 661 acquires voltage signals from the first acquisition line 61, the second acquisition line 62 and the third acquisition line 63 respectively;

[0065] S2: The voltage acquisition element 661 transmits the acquired voltage signal to the central control board 68;

[0066] S3: The central control board 68 collects the electrical signals from the maintenance meter 67;

[0067] S4: The central control board 68 judges the working status of the household intelligent photovoltaic detection device 100;

[0068] S41: When the first acquisition line 61 has a voltage signal, the second acquisition line 62 has a voltage signal, the third acquisition line 63 has a voltage signal, and the maintenance meter 67 has an electrical signal, it is determined that the operation is normal.

[0069] S42: When the first acquisition line 61 has no voltage signal, the second acquisition line 62 has no voltage signal, the third acquisition line 63 has no voltage signal, and the maintenance meter 67 has no power signal, it is determined that the mains power is out.

[0070] S43: When the first acquisition line 61 has a voltage signal, the second acquisition line 62 has no voltage signal, the third acquisition line 63 has no voltage signal, and the maintenance meter 67 has no power signal, the inlet switch 55 is determined to be faulty.

[0071] S44: When the first acquisition line 61 has a voltage signal, the second acquisition line 62 has no voltage signal, the third acquisition line 63 has no voltage signal, and the maintenance meter 67 has an electrical signal, the grid connection switch 45 is determined to be faulty.

[0072] S45: When the first acquisition line 61 has a voltage signal, the second acquisition line 62 has a voltage signal, the third acquisition line 63 has no voltage signal, and the maintenance meter 67 has an electrical signal, the power distribution switch 35 is determined to be faulty.

[0073] S5: The central control board 68 transmits the judgment result to the communication element 663;

[0074] S6: Communication element 663 transmits the results to the mobile terminal.

[0075] The aforementioned residential smart photovoltaic (PV) detection device 100 samples the voltage of the inlet switch 55, grid-connected switch 45, and distribution switch 35 via a first acquisition line 61, a second acquisition line 62, and a third acquisition line 63, respectively. Combined with the operating status of the maintenance meter 67, this enables rapid fault location determination. Furthermore, a communication element 663 facilitates rapid transmission of fault information, allowing users to accurately pinpoint the fault location immediately upon detection, thus improving maintenance efficiency. The detection method of the residential smart PV detection device 100 involves a central control board 68 quickly determining the operating status of the device and transmitting the data to a mobile terminal via the communication element 663. This allows users to quickly view the operating status of the device and ensures rapid, targeted repairs in case of faults, further improving maintenance efficiency.

[0076] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A household intelligent photovoltaic detection device, characterized in that, The system includes a photovoltaic panel, an inverter, a grid-connected distribution box, a grid-connected electricity meter, a household electricity meter, and an operation and maintenance device (O&M device). The inverter is electrically connected to the photovoltaic panel; the grid-connected distribution box is electrically connected to the inverter and contains a distribution switch; the grid-connected electricity meter is electrically connected to the grid-connected distribution box and contains a grid-connected switch; the household electricity meter is connected in parallel with the grid-connected electricity meter and contains a household switch; the O&M device is connected to both the grid-connected electricity meter and the household electricity meter, and the O&M device is equipped with a first data acquisition line, a second data acquisition line, and a third data acquisition line. Three data acquisition lines: the first acquisition line is electrically connected to the power input terminal of the inlet switch, the second acquisition line is electrically connected to the power input terminal of the grid-connected switch, and the third acquisition line is electrically connected to the power input terminal of the distribution switch; the maintenance unit includes a housing, a circuit board disposed within the housing, a maintenance meter electrically connected to the circuit board, and a central control board electrically connected to the circuit board; the circuit board is provided with voltage acquisition elements, energy storage elements, and communication elements; the grid-connected meter and the inlet meter are connected in parallel to the maintenance meter; the inverter contains... The circuit board includes a signal transmitting element that transmits data from the photovoltaic panel to the communication element; a voltage acquisition element connected to the first acquisition line, the second acquisition line, and the third acquisition line, and connected to the central control board; a maintenance meter connected to the central control board, and the central control board electrically connected to the communication element; a rectifier element connected to the incoming electricity meter; an energy storage element connected to the rectifier element; a switching element and a voltage regulator element also on the circuit board; the switching element connected to the energy storage element, positioned on the side of the energy storage element away from the rectifier element; a voltage regulator element connected to the switching element, positioned on the side of the switching element away from the energy storage element; two voltage regulator elements connected to each other, one to the communication element and the other to the central control board; the circuit board and the central control board arranged in a parallel configuration within the housing, with the maintenance meter positioned on one side of the circuit board.

2. A detection method for a residential smart photovoltaic (PV) testing device, applied to the residential smart PV testing device as described in claim 1, characterized in that, include: The voltage acquisition element acquires the voltage signals of the first acquisition line, the second acquisition line, and the third acquisition line, respectively. The voltage acquisition element transmits the acquired voltage signal to the central control board; The central control board collects electrical signals from the maintenance meters; The central control board determines the working status of the household smart photovoltaic detection device; When the first acquisition line has a voltage signal, the second acquisition line has a voltage signal, the third acquisition line has a voltage signal, and the maintenance meter has an electrical signal, it is determined that the system is working normally. When there is no voltage signal on the first acquisition line, no voltage signal on the second acquisition line, no voltage signal on the third acquisition line, and no power signal on the maintenance meter, it is determined that the mains power is out. When the first acquisition line has a voltage signal, the second acquisition line has no voltage signal, the third acquisition line has no voltage signal, and the maintenance meter has no power signal, the inlet switch is determined to be faulty. When the first acquisition line has a voltage signal, the second acquisition line has no voltage signal, the third acquisition line has no voltage signal, and the maintenance meter has an electrical signal, the grid connection switch is determined to be faulty. When the first acquisition line has a voltage signal, the second acquisition line has a voltage signal, the third acquisition line has no voltage signal, and the maintenance meter has an electrical signal, the power distribution switch is determined to be faulty. The central control board transmits the judgment result to the communication element; The communication element transmits the results to the mobile terminal.

Images