A photovoltaic power station grid-connected system

Abstract

The present invention discloses a photovoltaic power station grid-connected system, comprising a transmission line connected to a photovoltaic power generation device and a transformer substation at both ends, the transmission line being erected in the air through at least one electric pole; a controller and a gyroscope are arranged on the electric pole, and the bottom of the electric pole is rotatably connected to a base, and at least two pull ropes are connected to the upper end of the electric pole, and a pulling device is connected to one end of the pull rope away from the electric pole, and the pulling device and the gyroscope are both electrically or wirelessly connected to the controller. The present invention has the advantages of being able to effectively prevent the electric pole from tilting and reduce losses.

Description

Technical Field

[0001] The present invention relates to the field of electric power technology, and in particular to a photovoltaic power station grid-connected system. Background Art

[0002] With the advancement of the concept of green and low-carbon energy development, photovoltaic power generation, as an important pillar of national green energy construction, plays a key role in optimizing the power energy structure. Photovoltaic power generation requires a large area of ​​ground or roof for the placement of power generation equipment. However, with the development of projects in recent years, the quality plots available for the construction of power stations have become increasingly scarce. Therefore, photovoltaic power generation projects have gradually developed in remote and uninhabited areas. For example, a solar distributed power generation system for fishery and photovoltaic complementarity disclosed in the utility model patent with publication number CN203839978U, by setting solar cell modules above the water surface, not only makes full use of water resources, to a certain extent solves the problem of tight land for photovoltaic power generation, but also provides a good shielding environment for fish and shrimp farming, realizing a new model of fishery and photovoltaic complementarity combining fish farming with photovoltaic power generation.

[0003] At present, fishery-photovoltaic complementary power generation projects are often built in remote offshore shallows, inland lakes and fish ponds, etc., by setting up photovoltaic panel arrays above the water surface to convert light energy into electrical energy. Due to the poor natural foundation conditions in offshore shallows, inland lakes and fish ponds, the soil is soft and often accompanied by water and silt, and the prefabricated pile frames used to set up photovoltaic panels on the water surface are prone to tilting and collapse. Therefore, in order to eliminate the negative impact of prefabricated pile frames, floating fishery-photovoltaic complementary systems have appeared on the market, such as a floating fishery-photovoltaic complementary system disclosed in the Chinese utility model patent with publication number CN220292816U. However, the above-mentioned floating fishery-photovoltaic complementary system only solves the installation problem of photovoltaic panels. In the process from the photovoltaic panels converting light energy into electrical energy to the process of incorporating current into the high-voltage power grid, the current needs to be guided to the substation on the shore through transmission lines. Taking geological and safety factors into consideration, there is a certain distance between the substation and the photovoltaic panel array. Generally, one or more electric poles are needed to overhead the transmission lines. Although the underground parts of these poles are poured with cement piers to improve stability, the closer to the water, the softer the soil. The poles and cement piers will tilt and collapse as a whole, especially prone to tilting towards the direction near the water. Maintenance personnel need to deal with it in time, otherwise it will easily delay the repair time and cause greater losses.

[0004] How to solve the above problems has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The object of the present invention is to provide a photovoltaic power station grid-connected system which can effectively prevent the inclination of electric poles and reduce losses.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A photovoltaic power station grid-connected system provided by the present invention comprises a transmission line whose two ends are respectively connected to a photovoltaic power generation device and a substation, and the transmission line is erected in the air through at least one electric pole; a controller and a gyroscope are provided on the electric pole, and the bottom of the electric pole is rotatably connected to a base, and at least two pull ropes are connected to the upper end of the electric pole, and a pulling device is connected to the end of the pull rope away from the electric pole, and the pulling device and the gyroscope are both electrically or wirelessly connected to the controller.

[0008] Furthermore, the pulling device includes a protective box fixed to the ground, a winch is fixedly arranged in the protective box and a traction port is arranged on the protective box, and a locking device is fixedly arranged on the protective box, and the end of the pull rope away from the electric pole is successively extended into the protective box through the traction port and the locking device to be connected to the winch, and the winch and the locking device are electrically or wirelessly connected to the controller.

[0009] Furthermore, the locking device includes a screw with a screw nut, a connecting plate, and a fixed clamp block, wherein the screw is rotatably mounted on the inner wall of the protective box through two screw seats and is transmission-connected to a motor, the motor is electrically or wirelessly connected to a controller, one end of the connecting plate is fixedly connected to the screw nut and the other end of the connecting plate is slidably connected to a guide rail, and a movable clamp block is fixedly provided on the connecting plate, and a recess facing the fixed clamp block is provided at one end of the movable clamp block away from the connecting plate, and the recess is located below the traction port.

[0010] Furthermore, there are two pulling devices, which are symmetrically distributed on both sides of the electric pole.

[0011] Furthermore, the utility pole includes a pole body, a hoop is provided on the top of the pole body and a pole cavity is opened in the pole body, wherein the hoop is connected to the end of the pull rope away from the winch, the lower end of the pole body is rotatably connected to the base and strip slides are symmetrically provided on both sides of the upper end of the pole body along its length direction, the strip slides are connected to the pole cavity, the pole body is slidably connected to a cross arm for fixing the power transmission line through the strip slides, the cross arm is connected to the output end of a hydraulic system to form a structure that can drive the cross arm to make a linear motion along the length direction of the utility pole, and the hydraulic system is electrically connected to a controller.

[0012] Furthermore, the hydraulic system includes a hydraulic cylinder, a hydraulic pump, and an oil tank. The hydraulic cylinder, hydraulic pump, and oil tank are connected in sequence through hydraulic pipes to form a hydraulic circuit. An electromagnetic reversing valve is provided on the hydraulic pipe. The hydraulic cylinder is sleeved in a rod cavity, and the upper end of the hydraulic cylinder is an output end and the end is fixedly connected to the cross arm, and the electromagnetic reversing valve and the hydraulic pump are electrically connected to the controller.

[0013] Furthermore, the base includes a hollow shell, a rotating seat is fixedly arranged on the top of the shell, the upper end of the rotating seat is rotatably connected to the lower end of the electric pole, and the hydraulic pump, oil tank, and electromagnetic reversing valve are all fixedly arranged in the base, and the top surface of the shell is provided with a baffle surrounding the outside of the electric pole, and the oil tank is provided with an openable and closable oil nozzle, and the upper end of the oil nozzle passes through the top wall of the base and extends to the inner side of the baffle.

[0014] Furthermore, the electric pole is also provided with an audible and visual alarm, and the cross arm is also provided with a height sensor. The audible and visual alarm and the height sensor are both electrically or wirelessly connected to the controller.

[0015] Furthermore, a plurality of ground nails are fixedly arranged at the bottom of the shell and the protective box, and a plurality of groups of inverted nails are fixedly arranged on the surface of the ground nails.

[0016] Furthermore, the guide rail includes two guide rail seats, both of which are fixedly connected to the inner wall of the protection box and connected by a guide rod, and the guide rod is slidably sleeved with an end of the connecting plate away from the screw nut.

[0017] Due to the adoption of the above structure, the present invention has the following beneficial effects:

[0018] The present invention sets a gyroscope on the electric pole and the electric pole is rotatably connected to the base. When in use, two pulling devices respectively apply opposite pulling forces to the electric pole to keep the electric pole perpendicular to the ground. When the gyroscope senses that the electric pole is tilted, the controller adjusts the pulling forces applied to the electric pole by the two pulling devices to make the electric pole and the base rotate relative to each other until the electric pole returns to a state of being perpendicular to the ground. Therefore, the present invention can timely detect the tilt of the electric pole and adjust the angle of the electric pole in time to avoid further expansion of the tilt angle, thereby effectively preventing the electric pole from tilting and collapsing, thereby reducing the loss caused by the deformation of the transmission line caused by the tilt of the electric pole, and also providing sufficient time for subsequent maintenance personnel to come for repair, effectively improving the safety and reliability of the entire grid-connected system.

[0019] The present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, which are used to illustrate embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic structural diagram of the pulling device of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the locking device of the present invention;

[0024] Figure 4 It is a structural block diagram of the present invention. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Please refer to Figures 1 to 4 The present invention provides a photovoltaic power station grid-connected system, comprising a transmission line connected to a photovoltaic power generation device and a substation at both ends, the transmission line being erected in the air through at least one electric pole 1; a controller 2 and a gyroscope 3 are provided on the electric pole 1, and the bottom of the electric pole 1 is rotatably connected to a base 4, and at least two pull ropes 5 are connected to the upper end of the electric pole 1, and a pulling device 6 is connected to the end of the pull rope 5 away from the electric pole 1, and the two pulling devices 6 respectively apply opposite pulling forces to the electric pole 1, so that the electric pole 1 can be kept vertical to the ground for a long time; the pulling device 6 and the gyroscope 3 are both electrically or wirelessly connected to the controller 2. When the gyroscope 3 senses that the electric pole 1 is tilted, the controller 2 will adjust the pulling force applied to the electric pole 1 by the two pulling devices 6, so that the electric pole 1 and the base 4 rotate relative to each other until the electric pole 1 returns to a state of being vertical to the ground. Therefore, the present invention can promptly detect the tilt of the utility pole 1 and promptly adjust the angle of the utility pole 1 to avoid further expansion of the tilt angle, thereby effectively preventing the utility pole 1 from tilting and collapsing, thereby reducing the loss caused by the deformation of the transmission line caused by the tilt of the utility pole 1, and also providing sufficient time for subsequent maintenance personnel to come for maintenance, effectively improving the safety and reliability of the entire grid-connected system.

[0027] In the present invention, the pulling device 6 comprises a protection box 62 fixed on the ground, a winch 63 is fixedly arranged in the protection box 62, a traction port 64 is arranged on the protection box 62, and a locker 61 is fixedly arranged on the protection box 62, the end of the pull rope 5 away from the electric pole 1 is sequentially extended into the protection box 62 through the traction port 64 and the locker 61 to be connected with the winch 63, and the winch 63 and the locker 61 are both electrically connected or wirelessly connected with the controller 2. When the electric pole 1 and the base 4 are tilted, the winch 63 is started by the controller 2, the pull rope 5 is driven to be wound around the winch 63, and the electric pole 1 and the base 4 are pulled to deflect relative to each other until the electric pole 1 returns to a state vertical to the ground; the edge of the traction port 64 is smooth, which can reduce the wear of the pull rope 5 during the sliding process; when the winch 63 stops working, the locker 61 locks the pull rope 5, which can reduce the waste of electricity.

[0028] In the present invention, the locking device 61 includes a screw rod 611 with a screw nut, a connecting plate 612, and a fixed clamp block 613, wherein the screw rod 611 is rotatably mounted on the inner wall of the protective box 62 through two screw rod seats 614 and the screw rod 611 is transmission-connected to a motor 615, the motor 615 is electrically or wirelessly connected to the controller 2, one end of the connecting plate 612 is fixedly connected to the screw nut and the other end of the connecting plate 612 is slidably connected to a guide rail 616, and a movable clamp block 617 is fixedly provided on the connecting plate 612, and a recess 618 facing the fixed clamp block 613 is provided at one end of the movable clamp block 617 away from the connecting plate 612, and the recess 618 is located below the traction port 64, and the pull rope 5 passes through the recess 618 to form a structure capable of clamping the fixed pull rope 5. A reinforcing rib is provided on one side of the fixed clamp block 613 away from the notch 618; when it is necessary to pull the utility pole 1 to reset, the controller 2 starts the motor 615, drives the screw nut to move on the screw 611, and drives the fixed clamp block 613 to move away from the fixed clamp block 613 through the connecting plate 612, so that the notch 618 is separated from the fixed clamp block 613, and the pull rope 5 is loosened, so that the winch 63 can drive the pull rope 5 to be wound, thereby pulling the utility pole 1 back to a state perpendicular to the ground.

[0029] In the present invention, there are two pulling devices 6, which are symmetrically distributed on both sides of the electric pole 1. One of the pulling devices 6 is located on the side of the electric pole 1 close to the water, and the other pulling device 6 is located on the side of the electric pole 1 away from the water.

[0030] In the present invention, the electric pole 1 comprises a pole body 11, a hoop 12 is provided at the top of the pole body 11 and a pole cavity 13 is provided in the pole body 11, wherein the hoop 12 is connected to the end of the pull rope 5 away from the winch 63, the lower end of the pole body 11 is rotatably connected to the base 4 and the two sides of the upper end of the pole body 11 are symmetrically provided with strip sliding openings 14 provided along the length direction thereof, the strip sliding openings 14 are communicated with the pole cavity 13, the pole body 11 is slidably connected with a cross arm 15 for fixing the transmission line through the strip sliding openings 14, the cross arm 15 is connected to the output end of a hydraulic system 7 to form a structure capable of driving the cross arm 15 to perform linear motion along the length direction of the pole 1, and the hydraulic system 7 is electrically connected to the controller 2. When the pole 1 is tilted, the cross arm 15 is driven to slide along the strip sliding openings 14 by the hydraulic system 7, so that the transmission line can be effectively maintained at its original normal height.

[0031] In the present invention, the hydraulic system 7 includes a hydraulic cylinder 71, a hydraulic pump 72, and an oil tank 73. The hydraulic cylinder 71, the hydraulic pump 72, and the oil tank 73 are connected in sequence through hydraulic pipes to form a hydraulic circuit. An electromagnetic reversing valve 74 is provided on the hydraulic pipe. The hydraulic cylinder 71 is sleeved in the rod cavity 13, and the upper end of the hydraulic cylinder 71 is the output end and the end is fixedly connected to the cross arm 15, and the electromagnetic reversing valve 74 and the hydraulic pump 72 are both electrically connected to the controller 2, so that the controller 2 can control the hydraulic pump 72 to pump the hydraulic oil in the oil tank 73 to the hydraulic cylinder 71, so that the piston rod of the hydraulic cylinder 71 slides, thereby driving the cross arm 15 to move along the electric pole 1, so as to achieve the purpose of adjusting the height of the transmission line.

[0032] In the present invention, the base 4 includes a hollow shell 41, a rotating seat 42 is fixedly arranged on the top of the shell 41, the upper end of the rotating seat 42 is rotatably connected to the lower end of the electric pole 1, and a damping friction plate is provided at the connection between the rotating seat 42 and the electric pole 1 to prevent unplanned offset between the two; and the hydraulic pump 72, the oil tank 73, and the electromagnetic reversing valve 74 are all fixedly arranged in the base 4, and the top surface of the shell 41 is provided with a baffle 43 surrounding the outside of the electric pole 1, and the oil tank 73 is provided with an openable and closable oil nozzle 731, and the upper end of the oil nozzle 731 passes through the top wall of the base 4 and extends to the inner side of the baffle 43. When in use, the shell 41 is fixed to the ground, and the oil tank 73 is filled with hydraulic oil, which can provide weight and has good stability; when the base 4 is tilted, the maintenance personnel can extract the hydraulic oil in the oil tank 73 through the oil nozzle 731 during the maintenance process to reduce the weight of the base 4, thereby effectively reducing the difficulty for the maintenance personnel to restore the base 4 to a horizontal state.

[0033] In the present invention, the electric pole 1 is also provided with an audible and visual alarm 8, and the cross arm 15 is also provided with a height sensor 9, and the audible and visual alarm 8 and the height sensor 9 are both electrically or wirelessly connected to the controller 2. When the electric pole 1 tilts, the controller 2 controls the audible and visual alarm to sound an alarm to remind passers-by of the danger; when the overall height of the electric pole 1 drops due to factors such as ground subsidence, the height sensor 9 sends a signal to the controller 2, and the controller 2 controls the hydraulic system 7 to push the cross arm 15 to slide up, thereby effectively maintaining the transmission line at its original normal height.

[0034] In the present invention, a plurality of ground nails 100 are fixedly provided at the bottom of the shell 41 and the protective box 62 for fixing the shell 41 and the protective box 62; a plurality of groups of inverted nails 101 are fixedly provided on the surface of the ground nails 100, which can further improve the fixing effect.

[0035] In the present invention, the guide rail 616 includes two guide rail seats 6161, both of which are fixedly connected to the inner wall of the protective box 62 and are connected by a guide rod 6162. The guide rod 6162 is slidably connected to the end of the connecting plate 612 away from the screw nut, which can limit the freedom of the connecting plate 612 and prevent the connecting plate 612 from rotating axially around the screw 611.

[0036] When the present invention is in use, the gyroscope 3 monitors the angle of the electric pole 1 in real time. When the gyroscope 3 senses that the electric pole 1 is tilted, the controller 2 will start the locker 61, and after the pull rope 5 is loosened, the two winches 63 are adjusted to apply tension to the electric pole 1, so that the electric pole 1 and the base 4 rotate relative to each other until the electric pole 1 returns to a state vertical to the ground, thereby avoiding further increase in the tilt angle of the electric pole 1, thereby effectively preventing the electric pole 1 from tilting and collapsing, and further reducing the loss caused by the deformation of the transmission line caused by the tilt of the electric pole 1, and providing sufficient time for subsequent maintenance personnel to come for repair, effectively improving the safety and reliability of the entire grid-connected system.

[0037] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention are still within the scope of protection of the technical solutions of the present invention.

Claims

1. A photovoltaic power station grid-connected system, comprising a transmission line with two ends respectively connected to a photovoltaic power generation device and a substation, wherein the transmission line is erected in the air via at least one electric pole (1); characterized in that: The utility pole (1) is provided with a controller (2) and a gyroscope (3), and the bottom of the utility pole (1) is rotatably connected to a base (4), and the upper end of the utility pole (1) is connected to at least two pull ropes (5), and the ends of the pull ropes (5) away from the utility pole (1) are connected to a pulling device (6), and the pulling device (6) and the gyroscope (3) are both electrically connected or wirelessly connected to the controller (2); The pulling device (6) comprises a protection box (62) fixed to the ground, a winch (63) fixedly arranged in the protection box (62) and a traction port (64) arranged on the protection box (62), and a locking device (61) fixedly arranged on the protection box (62), and the end of the pull rope (5) away from the electric pole (1) extends into the protection box (62) through the traction port (64) and the locking device (61) in sequence to be connected to the winch (63), and the winch (63) and the locking device (61) are both electrically connected or wirelessly connected to the controller (2); The locking device (61) comprises a screw rod (611) with a screw nut, a connecting plate (612), and a fixed clamping block (613), wherein the screw rod (611) is rotatably mounted on the inner wall of the protective box (62) via two screw rod seats (614), and the screw rod (611) is transmission-connected to a motor (615), and the motor (615) is electrically or wirelessly connected to the controller (2), one end of the connecting plate (612) is fixedly connected to the screw nut, and the other end of the connecting plate (612) is slidably connected to a guide rail (616), and a movable clamping block (617) is fixedly provided on the connecting plate (612), and a notch (618) facing the fixed clamping block (613) is provided at one end of the movable clamping block (617) away from the connecting plate (612), and the notch (618) is located below the traction port (64); The utility pole (1) comprises a pole body (11), a hoop (12) is provided at the top of the pole body (11), and a pole cavity (13) is provided in the pole body (11), wherein the hoop (12) is connected to an end of a pull rope (5) away from a winch (63), the lower end of the pole body (11) is rotatably connected to a base (4), and strip-shaped sliding openings (14) are symmetrically provided along the length direction of the pole body (11) on both sides of the upper end, the strip-shaped sliding openings (14) are communicated with the pole cavity (13), the pole body (11) is slidably connected to a cross arm (15) for fixing a power transmission line through the strip-shaped sliding openings (14), the cross arm (15) is connected to an output end of a hydraulic system (7) to form a structure capable of driving the cross arm (15) to perform linear motion along the length direction of the utility pole (1), and the hydraulic system (7) is electrically connected to a controller (2); The hydraulic system (7) comprises a hydraulic cylinder (71), a hydraulic pump (72), and an oil tank (73); the hydraulic cylinder (71), the hydraulic pump (72), and the oil tank (73) are connected in sequence via a hydraulic pipeline to form a hydraulic circuit; an electromagnetic reversing valve (74) is provided on the hydraulic pipeline; the hydraulic cylinder (71) is sleeved in a rod cavity (13); the upper end of the hydraulic cylinder (71) is an output end and is fixedly connected to a cross arm (15); and the electromagnetic reversing valve (74) and the hydraulic pump (72) are both electrically connected to a controller (2); The base (4) comprises a hollow shell (41), a rotating seat (42) is fixedly arranged on the top of the shell (41), the upper end of the rotating seat (42) is rotatably connected to the lower end of the electric pole (1), and the hydraulic pump (72), the oil tank (73), and the electromagnetic reversing valve (74) are all fixedly arranged in the base (4), and the top surface of the shell (41) is provided with a baffle (43) surrounding the outside of the electric pole (1), and the oil tank (73) is provided with an openable and closable oil nozzle (731), and the upper end of the oil nozzle (731) passes through the top wall of the base (4) and extends to the inner side of the baffle (43).

2. A photovoltaic power station grid-connected system according to claim 1, characterized in that: The number of the pulling devices (6) is two, and the two pulling devices (6) are symmetrically distributed on both sides of the electric pole (1).

3. A photovoltaic power station grid-connected system according to claim 1, characterized in that: The electric pole (1) is also provided with an audible and visual alarm (8), and the cross arm (15) is also provided with a height sensor (9), and the audible and visual alarm (8) and the height sensor (9) are both electrically connected or wirelessly connected to the controller (2).

4. A photovoltaic power station grid-connected system according to claim 1, characterized in that: A plurality of ground nails (100) are fixedly arranged at the bottom of the housing (41) and the protection box (62), and a plurality of groups of inverted nails (101) are fixedly arranged on the surface of the ground nails (100).

5. A photovoltaic power station grid-connected system according to claim 1, characterized in that: The guide rail (616) comprises two guide rail seats (6161), both guide rail seats (6161) are fixedly connected to the inner wall of the protection box (62), and the two guide rail seats (6161) are connected via a guide rod (6162), and the guide rod (6162) is slidably sleeved with an end of the connecting plate (612) away from the screw nut.

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