Photovoltaic off-grid power supply control system for base stations

Abstract

The present invention relates to the field of photovoltaic power supply technology, and specifically provides a photovoltaic off-grid power supply control system for base station field, including an inverter, the inverter includes a cabinet, a controller and a switch electrically connected to each other are arranged in the cabinet, the switch is electrically connected to the DC wiring and the AC wiring respectively, the cabinet is installed with a mounting block, the mounting block is installed with a first sensor and a second sensor, when the mounting block moves downward, the first sensor can overlap with the DC wiring and detect the DC wiring, when the mounting block moves upward, the second sensor can overlap with the AC wiring and detect the AC wiring. It is convenient to grasp the data of two groups of electrical wiring, and the first sensor and the second sensor of the present invention are to perform mobile multi-point detection on the surface of the electrical wiring and obtain multiple groups of data, the randomness is small, and the result is more reliable and comprehensive.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power supply, and in particular provides a photovoltaic off-grid and on-grid power supply control system for base station field. Background Art

[0002] The off-grid switching control system of the energy storage inverter is the core part of the photovoltaic energy storage system. It can control the charging and discharging process of the battery and perform AC / DC conversion. In addition, it also has the ability to connect the energy storage system to an independent power grid system and a transmission and distribution grid. Generally, sensors are installed in the energy storage inverter control device to monitor the current and voltage passing through, which makes it easier to troubleshoot abnormalities in the system.

[0003] The Chinese invention patent with application number 202311497319.5 discloses a method for off-grid switching control of an energy storage inverter, including a box, a conductor, and a sensor sleeved on the surface of the conductor, and also includes a switching component arranged in an isolation plate, which is used to reciprocate the use of the two monitoring sensors, and the two sensors work intermittently to monitor the conductor. However, due to the fixed position of the sensor on the conductor, the scheme can only perform local monitoring of the conductor where the sensor is located. The two sensors can obtain data from two points, and the data obtained is accidental; on the other hand, the inverter is connected to the DC wiring and the AC wiring. The two sensors in the above scheme can only detect the data of one group of conductors, which lacks reliability and comprehensiveness. Summary of the invention

[0004] In view of the above-mentioned defects, the present invention provides a photovoltaic off-grid power supply control system for base station field, which aims to solve the problem that the monitoring of DC power connection and AC power connection in the existing off-grid inverter is highly accidental and lacks reliability and comprehensiveness.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a photovoltaic off-grid power supply control system for the base station field, including an inverter, the inverter including a cabinet, a controller and a switch electrically connected to each other are arranged in the cabinet, the switch is electrically connected to the DC wiring and the AC wiring respectively, a mounting frame is fixed to the side wall of the cabinet, a mounting block is slidably installed in the mounting frame, a first mounting plate is slidably arranged in the mounting block, an opening is provided in the middle of the mounting block, a moving frame is passed through the middle of the first mounting plate and is fixedly connected, a first sensor and a second sensor are respectively fixed on both sides of the moving frame, a driving mechanism is installed in the mounting frame, the driving mechanism is connected to the mounting block and can drive the mounting block to move up and down, when the mounting block moves downward, the first sensor can overlap with the DC wiring and detect the DC wiring, when the mounting block moves upward, the second sensor can overlap with the AC wiring and detect the AC wiring.

[0006] Preferably, the driving mechanism includes a motor fixed to the top of the mounting frame, the output shaft of the motor is fixedly connected to one end of a reciprocating screw, the other end of the reciprocating screw passes through the mounting frame and is rotatably connected to the bottom of the mounting frame, and a threaded hole matching the reciprocating screw is provided on the mounting block, and the mounting block is threadedly connected to the reciprocating screw through the threaded hole.

[0007] Preferably, a mounting groove is provided on one side of the mounting block, and a first mounting plate that can slide back and forth is installed in the mounting groove, one end of a first spring is fixedly mounted on the side wall of the mounting groove, the other end of the first spring is fixedly connected to one end of the first mounting plate, and the end face of the other end of the first mounting plate is an inclined surface that is inclined from top to bottom toward the inner side of the first mounting plate, and a first fixed block that can squeeze the first mounting plate toward the direction close to the first spring is fixedly mounted on the bottom of the mounting frame, and a limiting mechanism is also installed on the first mounting plate, and the limiting mechanism can lock the squeezed first mounting plate, and a second fixed block for resetting the limiting mechanism is also fixedly mounted on the top of the mounting frame.

[0008] Preferably, the limiting mechanism includes a limiting groove opened on the top of the first mounting plate, one end of the second spring is fixedly installed on the bottom of the limiting groove, the other end of the second spring is fixedly installed on the limiting block, the limiting block is slidably matched with the limiting groove, and a reset socket is provided on the top of the mounting block, and the limiting block and the second fixed block can be plugged into the reset socket.

[0009] Preferably, heat dissipation openings are provided on both sides of the cabinet, dustproof plates are arranged inside the heat dissipation openings, and the dustproof plates are fixedly connected to the cabinet.

[0010] Preferably, bristles are fixedly mounted on a side of the mounting block close to the dustproof plate, and the bristles are in contact with the dustproof plate.

[0011] Preferably, a second mounting plate is fixedly mounted in the cabinet, and fan blades are rotatably mounted on the second mounting plate, and the fan blades are located on the inner side of the dustproof plate.

[0012] Preferably, a first rack and a second rack are fixedly connected to the inner walls on both sides of the movable frame, and a gear capable of alternately meshing with the first rack and the second rack is fixedly mounted on the fan blade.

[0013] Preferably, slide rails are provided on the inner walls on both sides of the installation frame, and sliding blocks matching the slide rails are fixedly mounted on both ends of the installation block.

[0014] Preferably, the moving frame is fixedly connected to the first sensor via a first connecting rod, and the moving frame is fixedly connected to the second sensor via a second connecting rod.

[0015] The purpose of the present invention is to provide a photovoltaic off-grid power supply control system for base station field, which has the following beneficial effects:

[0016] ① The present invention sets a first sensor to detect DC wiring and sets a second sensor to detect AC wiring, so as to facilitate the acquisition of data of the two groups of wiring. The first sensor and the second sensor of the present invention perform mobile multi-point detection on the surface of the wiring and obtain multiple groups of data, which is helpful to find potential fault points. Moreover, the multiple groups of data are less random and the results are more reliable and comprehensive.

[0017] ② The coordinated setting of the mounting block and the bristles of this scheme enables this scheme to clean the dustproof plate while detecting the electrical wiring. The setting of the fan blades can minimize the dust flying into the cabinet during the cleaning process. During cleaning, the rotation of the fan blades can also improve the cleaning efficiency. The bristles and fan blades are driven by the up and down movement of the mounting block instead of a separate motor, which makes the device more collaborative and saves more resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a front view of the present invention;

[0020] Figure 3 for Figure 2 Cross-sectional view at position "AA" in the figure;

[0021] Figure 4 It is a partial axonometric diagram of the present invention at a first viewing angle;

[0022] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0023] Figure 6 This is a schematic diagram of the coordination between the bristles and the mounting block in the present invention;

[0024] Figure 7 for Figure 6 Cross-sectional view at the "BB" position.

[0025] In the figure: 1-cabinet; 2-controller; 3-switch; 4-DC wiring; 5-AC wiring; 10-mounting frame; 11-mounting block; 12-mounting slot; 13-first mounting plate; 14-moving frame; 20-first sensor; 21-second sensor; 30-motor; 31-reciprocating screw; 40-first spring; 41-first fixed block; 42-second fixed block; 43-limiting slot; 44-second spring; 45-limiting block; 46-reset jack; 50-heat dissipation port; 51-dustproof plate; 52-brush; 60-second mounting plate; 61-fan blades; 71-first rack; 72-second rack; 73-gear; 80-slide rail; 81-slider; 90-first connecting rod; 91-second connecting rod. DETAILED DESCRIPTION

[0026] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0027] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0028] See also Figure 1-7 The present invention provides a photovoltaic off-grid and on-grid power supply control system for base station field, including an inverter, which is electrically connected to a photovoltaic module, a battery and a power supply object respectively. The inverter includes a cabinet 1, and a controller 2 and a switch 3 electrically connected to each other are arranged in the cabinet 1. When switching is required, the switch 3 is controlled by the controller 2 to switch off the grid.

[0029] The switching switch 3 is electrically connected to the DC wiring 4 and the AC wiring 5 respectively. A mounting frame 10 is fixed to the side wall of the cabinet 1. A mounting block 11 is slidably installed in the mounting frame 10. A mounting groove 12 is provided on one side of the mounting block 11. A first mounting plate 13 that can slide back and forth is installed in the mounting groove 12. An opening is provided in the middle of the mounting block 11. A moving frame 14 is fixedly connected to the middle of the first mounting plate 13 through the opening. A first sensor 20 and a second sensor 21 are fixed to both sides of the moving frame 14. Specifically, the moving frame 14 is connected to the first sensor 20 and the second sensor 21 through the first mounting plate 13. A connecting rod 90 is fixedly connected to the first sensor 20, and the movable frame 14 is fixedly connected to the second sensor 21 via a second connecting rod 91; a driving mechanism is installed in the mounting frame 10, and the driving mechanism is connected to the mounting block 11 and can drive the mounting block 11 to move up and down. When the mounting block 11 moves downward, the first sensor 20 can overlap with the DC power connection 4 and detect the DC power connection 4. When the mounting block 11 moves upward, the second sensor 21 can overlap with the AC power connection 5 and detect the AC power connection 5.

[0030] Among them, slide rails 80 arranged in the up and down directions are provided on both sides of the installation frame 10, and sliders 81 matching with the slide rails 80 are fixedly installed at both ends of the installation block 11. The sliders 81 are located in the slide rails 80 and can only move up and down along the direction of the slide rails 80.

[0031] Among them, the up and down movement of the mounting block 11 of this scheme can be in any way, such as driving the mounting block to move up and down by an electric push rod. In this embodiment, it is driven by a motor 30. Specifically, a motor 30 is fixedly installed on the top of the mounting frame 10. The output shaft of the motor 30 is fixedly connected to one end of a reciprocating screw 31. The other end of the reciprocating screw 31 passes through the mounting frame 10 and is rotatably connected to the bottom of the mounting frame 10. The reciprocating screw 31 is located on the center line of both sides of the mounting frame 10. A threaded hole matching the reciprocating screw 31 is also provided in the middle of the mounting block 11, and the mounting block 11 is connected to the reciprocating screw 31 through the threaded hole.

[0032] As a further explanation of this embodiment, one end of a first spring 40 is fixedly mounted on the side wall of the mounting groove 12 away from one end of the notch, and the other end of the first spring 40 is fixedly connected to one end of the first mounting plate 13. The other end of the first mounting plate 13 exposes the mounting block 11, and the end surface of the end exposed from the mounting block 11 is an inclined surface inclined from top to bottom toward the inside of the first mounting plate 13, that is, the first mounting plate 13 is wedge-shaped. A first fixed block 41 is fixedly mounted at the bottom of the mounting frame 10, which can squeeze the first mounting plate 13 that leaks out of the mounting block 11 toward the direction close to the first spring 40, and a limiting mechanism is also installed on the first mounting plate 13, which can lock the squeezed first mounting plate 13, and a second fixed block 42 for resetting the limiting mechanism is also fixedly mounted on the top of the mounting frame 10.

[0033] As a further explanation of this embodiment, the limiting mechanism includes a limiting groove 43 arranged at the top of the first mounting plate 13, one end of a second spring 44 is fixedly installed at the bottom of the limiting groove 43, and a limiting block 45 is fixedly installed at the other end of the second spring 44. The limiting block 45 is slidably matched with the limiting groove 43, and a reset socket 46 is provided at the top of the mounting block 11, and the limiting block 45 and the second fixed block 42 can be plugged into the reset socket 46.

[0034] When the mounting block 11 moves from top to bottom, the first spring 40 presses against the first mounting plate 13. At this time, the limit groove 43 is located on the side of the reset socket 46 away from the first spring 40, and the first sensor 20 overlaps the DC wiring 4. The first sensor 20 descends with the mounting block 11 and detects different positions of the DC wiring 4 for many times; when the mounting block 11 moves to the bottom, the first mounting plate 13 moves toward the inner side of the mounting groove 12 under the action of the first fixing block 41, driving the moving frame 14 and the first sensor 20 and the second sensor 21 fixed on the moving frame 14 to move accordingly. When the limit groove 43 is aligned with the reset socket 46, the limit block 45 is at the second spring 44 pops up under the action of the first spring 44 and is inserted into the reset socket 46 to achieve limiting. At this time, the first sensor 20 is no longer overlapped with the DC wiring 4, and the second sensor 21 is overlapped with the AC wiring 5. Then the mounting block 11 moves upward, and the second sensor 21 rises with the mounting block 11 and detects different positions of the AC wiring 5 multiple times; when the mounting block 11 moves to the top of the mounting frame 10, the second fixing block 42 will squeeze the limiting block 45 out of the reset socket 46, and then the first mounting plate 13 moves toward the outside of the mounting slot 12 driven by the first spring 40 to achieve the reset effect. After resetting, the first sensor 20 continues to overlap with the DC wiring 4.

[0035] Among them, the staff can set the sampling frequency for the first sensor 20 and the second sensor 21. For example, the first sensor 20 and the second sensor 21 can be set to collect current and voltage parameters every 2 seconds after they come into contact with their corresponding electrical wiring. This helps to find potential fault points in the electrical wiring of the inverter, such as poor contact, insulation damage, etc., so that measures can be taken in advance for repair or replacement to avoid failures.

[0036] As a further explanation of this embodiment, the cabinet 1 is provided with heat dissipation ports 50 on both sides thereof, and dustproof plates 51 are installed on the inner sides of the heat dissipation ports 50, and the dustproof plates 51 are fixed on the cabinet 1; when dust and the like pass through the heat dissipation ports 50 driven by the air flow and want to enter the interior of the cabinet, they will be blocked by the dustproof plates 51, thereby preventing dust and the like from entering the cabinet 1 and attaching to the controller 2 and the switching switch 3. The attached dust will affect the heat dissipation of the controller 2 and even affect the normal use of the switching switch 3.

[0037] Although the dustproof plate 51 can block most of the dust from entering the interior of the cabinet 1, if the dustproof plate 51 is not cleaned during long-term use, dust and the like will easily accumulate on the dustproof plate 51, and even block the dustproof holes on the dustproof plate 51. When the dustproof holes are blocked, the air circulation will be reduced, and the heat dissipation performance inside the cabinet 1 will also be reduced. In order to ensure the stability of the overall heat dissipation performance, the present device has added a cleaning mechanism for cleaning the dustproof plate 51. A brush 52 is also installed on the side of the mounting block 11 close to the dustproof plate 51, and the brush 52 is in contact with the dustproof plate 51. The brush 52 is driven by the up and down movement of the mounting block 11, thereby cleaning the dustproof plate 51 to prevent heat dissipation from being affected by dust accumulation.

[0038] As a further explanation of this embodiment, a second mounting plate 60 is fixedly mounted inside the cabinet 1, and a fan blade 61 is mounted on the second mounting plate 60, and the fan blade 61 is located on the inner side of the dustproof plate 51 and the mounting block 11. Since dust may fly around when the bristles 52 clean the dustproof plate 51, by adding a fan blade 61, when the bristles 52 clean, the fan blade 61 also rotates and blows air outward, so that most of the dust is blown outward, minimizing the dust from entering the cabinet 1.

[0039] As a further explanation of this embodiment, the rotation of the fan blade 61 is achieved through the transmission of the rack and the gear. The inner walls on both sides of the moving frame 14 are fixedly connected with the first rack 71 and the second rack 72. The fan blade 61 is fixedly installed with a gear 73 that can mesh with the first rack 71 and the second rack 72. The first rack 71 and the second rack 72 will move under the drive of the first mounting block 11. Specifically, when the mounting block 11 moves from top to bottom, the first rack 71 meshes with the gear 73, driving the gear 73 to rotate and thus driving the fan blade 61 to rotate; when the mounting block 11 moves to the bottom, driven by the first mounting plate 13 and the moving frame 14, the second rack 72 meshes with the gear 73, and as the mounting block 11 moves upward, it continues to drive the fan blade 61 to rotate in the same direction. By switching the first rack 71 and the second rack 72, the rotation direction of the fan blade 61 is the same regardless of whether the mounting block 11 moves upward or downward. Since the fan blade 61 itself has a certain curvature, only by keeping the rotation direction of the fan blade 61 unchanged can the fan blade 61 continue to generate forward wind force.

[0040] The working principle of the device is as follows: first, the starting interval and duration of the motor 30 are set, for example, starting once every 4 hours, each time for 10 minutes. When the motor 30 is started, the motor 30 drives the reciprocating screw 31 to rotate, thereby driving the mounting block 11 to move up and down. When the mounting block 11 moves from top to bottom, the first sensor 20 descends with the mounting block 11 and detects different positions of the DC wiring 4 multiple times; when the mounting block 11 moves from bottom to top, the second sensor 21 rises with the mounting block 11 and detects different positions of the AC wiring 5 multiple times.

[0041] Driven by the mounting block 11, the bristles 52 clean the dustproof plate 51. During the cleaning process, the fan blades 61 also rotate driven by the first rack 71 and the second rack 72, thereby preventing dust from flying around during the cleaning process.

[0042] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by ordinary technicians in this field based on the above-mentioned concepts without creative work are all within the protection scope of the present invention.

Claims

1. A photovoltaic off-grid power supply control system for base station field, comprising an inverter, characterized in that: The inverter comprises a cabinet (1), wherein a controller (2) and a switch (3) electrically connected to each other are arranged in the cabinet (1), wherein the switch (3) is electrically connected to a DC power connection (4) and an AC power connection (5) respectively, wherein a mounting frame (10) is fixed to a side wall of the cabinet (1), wherein a mounting block (11) is slidably mounted in the mounting frame (10), wherein a first mounting plate (13) is slidably arranged in the mounting block (11), wherein an opening is arranged in the middle of the mounting block (11), wherein a movable frame (14) is fixedly connected to the middle of the first mounting plate (13) through the opening, wherein the movable frame (14) is fixedly mounted to the middle of the first mounting plate (13), ... A first sensor (20) and a second sensor (21) are respectively fixed on both sides of the frame (14); a driving mechanism is installed in the mounting frame (10); the driving mechanism is connected to the mounting block (11) and is capable of driving the mounting block (11) to move up and down; when the mounting block (11) moves downward, the first sensor (20) is capable of overlapping the DC power connection (4) and detecting the DC power connection (4); when the mounting block (11) moves upward, the second sensor (21) is capable of overlapping the AC power connection (5) and detecting the AC power connection (5); The driving mechanism comprises a motor (30) fixed to the top of the mounting frame (10); an output shaft of the motor (30) is fixedly connected to one end of a reciprocating screw rod (31); the other end of the reciprocating screw rod (31) passes through the mounting frame (10) and is rotatably connected to the bottom of the mounting frame (10); a threaded hole matching the reciprocating screw rod (31) is formed on the mounting block (11); and the mounting block (11) is threadedly connected to the reciprocating screw rod (31) via the threaded hole; A mounting groove (12) is provided on one side of the mounting block (11), a first mounting plate (13) which can slide forward and backward is installed in the mounting groove (12), one end of a first spring (40) is fixedly installed on the side wall of the mounting groove (12), the other end of the first spring (40) is fixedly connected to one end of the first mounting plate (13), the end surface of the other end of the first mounting plate (13) is an inclined surface which is inclined from top to bottom toward the inner side of the first mounting plate (13), a first fixed block (41) which can press the first mounting plate (13) toward the first spring (40) is fixedly installed at the bottom of the mounting frame (10), a limiting mechanism is also installed on the first mounting plate (13), the limiting mechanism can lock the pressed first mounting plate (13), and a second fixed block (42) for resetting the limiting mechanism is also fixedly installed on the top of the mounting frame (10); The limiting mechanism comprises a limiting groove (43) formed on the top of the first mounting plate (13); one end of a second spring (44) is fixedly mounted on the bottom of the limiting groove (43); a limiting block (45) is fixedly mounted on the other end of the second spring (44); the limiting block (45) is slidably matched with the limiting groove (43); a reset socket (46) is provided on the top of the mounting block (11); the limiting block (45) and the second fixing block (42) can both be plugged into the reset socket (46); Both sides of the cabinet (1) are provided with heat dissipation openings (50), the inner side of the heat dissipation openings (50) is provided with dustproof plates (51), and the dustproof plates (51) are fixedly connected to the cabinet (1); A second mounting plate (60) is fixedly mounted in the cabinet (1), a fan blade (61) is rotatably mounted on the second mounting plate (60), and the fan blade (61) is located on the inner side of the dustproof plate (51); A first rack (71) and a second rack (72) are fixedly connected to the inner walls on both sides of the movable frame (14), and a gear (73) capable of alternately meshing with the first rack (71) and the second rack (72) is fixedly mounted on the fan blade (61).

2. The photovoltaic off-grid and on-grid power supply control system for base station field according to claim 1, characterized in that: Brushes (52) are also fixedly mounted on one side of the mounting block (11) close to the dustproof plate (51), and the brushes (52) are in contact with the dustproof plate (51).

3. The photovoltaic off-grid and on-grid power supply control system for base station field according to claim 1, characterized in that: Slide rails (80) are provided on the inner walls of both sides of the installation frame (10), and sliding blocks (81) matching the slide rails (80) are fixedly mounted on both ends of the installation block (11).

4. The photovoltaic off-grid and on-grid power supply control system for base station field according to claim 1, characterized in that: The moving frame (14) is fixedly connected to the first sensor (20) via a first connecting rod (90), and the moving frame (14) is fixedly connected to the second sensor (21) via a second connecting rod (91).

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