Photovoltaic substation direct-current area single-pole grounding fault positioning and troubleshooting device and positioning method

Abstract

The invention belongs to the technical field of ground fault troubleshooting, and particularly relates to a single-pole ground fault positioning and troubleshooting device and a single-pole ground fault positioning and troubleshooting method for a direct-current area of a photovoltaic transformer substation, aiming at detecting ground resistance of the direct-current area of the photovoltaic transformer substation by generally using a ground resistance measuring instrument during ground fault troubleshooting. In order to solve the problems that the ground resistance of a direct current area of a photovoltaic power station needs to be detected, and when an existing ground resistance measuring instrument is used, a detector needs to manually insert a ground rod into the ground and repeatedly operate to detect the ground resistance, so that the labor force of the detector is increased, and the troubleshooting efficiency is reduced, the following scheme is provided: the ground resistance measuring instrument comprises a tool supporting plate; and a checking module is arranged below the tool supporting plate. The photovoltaic substation direct current area single pole grounding fault positioning and troubleshooting device and the positioning method have the advantages that multipoint detection of ground resistance is achieved, the troubleshooting accuracy is improved, the labor force of detection personnel is reduced, and the troubleshooting efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of grounding fault troubleshooting, and in particular to a device and method for locating and troubleshooting single-pole grounding faults in a DC zone of a photovoltaic substation. Background Art

[0002] As the world economy continues to develop, the demand for energy in industry continues to increase, and traditional fossil fuels can no longer meet the demand. As one of the high-quality green energy sources, solar power generation has the characteristics of economy and environmental protection. Therefore, photovoltaic power generation has developed rapidly, and some large-scale photovoltaic power stations have begun to be built and put into operation in large quantities. As the scale of photovoltaic power stations continues to expand, photovoltaic power generation failures also occur frequently. There are a huge number of DC cables between photovoltaic modules, between photovoltaic strings and inverters or combiner boxes. If the insulation layer ages or the insulation is damaged by external factors, it will cause grounding or short circuit failures, causing the photovoltaic power generation system to shut down and the power generation efficiency to be damaged.

[0003] When troubleshooting a ground fault, a ground resistance meter is generally used to detect the ground resistance in the DC zone of a photovoltaic power station. Since the ground resistance in the DC zone of the photovoltaic power station needs to be detected, when using an existing ground resistance meter, a tester needs to manually insert a ground rod into the ground and repeat the operation to detect the ground resistance, which increases the labor of the tester and reduces the efficiency of troubleshooting. Summary of the invention

[0004] The present invention discloses a device and a method for locating and troubleshooting a single-pole grounding fault in a DC zone of a photovoltaic substation, and aims to solve the technical problem in the background technology that a grounding resistance measuring instrument is generally used to detect the ground resistance in the DC zone of a photovoltaic power station when troubleshooting a grounding fault. Since it is necessary to detect multi-point resistances of the ground in the DC zone of the photovoltaic power station, when using the existing grounding resistance measuring instrument, a detection personnel is required to manually insert a grounding rod into the ground, and repeat the operation to perform multi-point detection of the ground resistance, which increases the labor of the detection personnel and reduces the efficiency of fault detection.

[0005] The device for locating and troubleshooting single-pole grounding faults in the DC zone of a photovoltaic substation proposed by the present invention comprises a tooling support plate, a troubleshooting module is arranged below the tooling support plate, and the troubleshooting module comprises a mounting plate, a mounting circular hole is opened on the mounting plate, and a limited circular gear rod is fixedly connected to the inner wall of the mounting circular hole, a circular hole 1 is opened on the mounting plate, and an adjusting cylinder is connected to the inside of the circular hole 1 through a bearing, and a linkage gear 1 is fixedly connected to the outside of the adjusting cylinder, and a universal movable wheel is fixedly connected to the bottom of the tooling support plate at equal distances.

[0006] In a preferred solution, the mounting plate is fixedly connected with a guide rail, and an adjusting gear rod is slidably connected inside the guide rail, the tooth block end of the adjusting gear rod is meshed with a linkage gear, a slot is provided on the side of the guide rail, a stop block is fixedly connected to the side of the adjusting gear rod, two L brackets are fixedly connected to the tooling support plate, the opposite sides of the two L brackets are fixedly connected with the same placement frame, a ground resistance meter is placed inside the placement frame, an electric drive rod is fixedly connected to the side of one of the L brackets, and the driving end of the electric drive rod is fixedly connected to the side of the stop block.

[0007] In a preferred solution, one end of the adjusting cylinder is fixedly connected to an angle adjusting support rod, and the angle adjusting support rod is provided with two sliding grooves, the interiors of the two sliding grooves are slidably connected to sliding support seats, the two sliding support seats are provided with round holes two, the interiors of the two round holes two are connected to rotating shafts through bearings, the two top ends of the angle adjusting support rod are provided with round holes three, the interiors of the two round holes three are connected to rotating round rods through bearings, and the sides of the angle adjusting support rod are fixedly connected to two scale plates.

[0008] In a preferred solution, the outside of the two rotating circular rods are fixedly connected with a linkage gear 2, and the linkage gear 2 is meshed with the limiting circular gear rod. One end of the two rotating circular rods is fixedly connected with a pushing circular plate. The two pushing circular plates are provided with circular holes 4 away from their center positions. The insides of the two circular holes 4 are connected with eccentric shafts through bearings. The eccentric shaft and the outside of the rotating shaft are movably connected by the same push-pull rod.

[0009] In a preferred solution, the bottoms of the two sliding support seats are connected to fixed plates by bolts, and the bottoms of the two fixed plates are fixedly connected to two electric telescopic rods 1, the driving ends of the two electric telescopic rods 1 located on the same side are fixedly connected to the same lifting support plate, and pointers are fixedly connected to the two fixed plates.

[0010] In a preferred solution, the two lifting support plates are each provided with a slide groove opening, and the inside of the two slide groove openings are slidably connected with a clamping slide seat, the side surfaces of the two clamping slide seats and the side surfaces of the lifting support plates are fixedly connected with a rubber soft plate, the side surfaces of the two lifting support plates are fixedly connected with an electric telescopic rod 2, the driving end of the electric telescopic rod 2 is fixedly connected to the side surface of the clamping slide seat, and the same grounding rod body is placed inside the two rubber soft plates on the same side.

[0011] By setting up a troubleshooting module, when using a ground resistance meter to detect the ground resistance of the DC area of ​​the photovoltaic power station, first move the tooling support plate to the ground position of the DC area, then place the ground rod body inside the rubber soft plate, and then start the electric telescopic rod 2, so that the electric telescopic rod 2 drives the rubber soft plate on the clamping slide to clamp and fix the ground rod body, and the electric drive rod drives the adjusting gear rod to move in the guide track, so that the adjusting gear rod drives the linkage gear 1 to rotate the adjusting cylinder, and the adjusting cylinder drives the angle adjustment support rod to move in a circle when rotating, so that the two top ends of the angle adjustment support rod The linkage gear 2 rotates under the limit of the limit round gear rod, so that the rotating round rod drives the pushing round plate so that the push-pull rod adjusts the position of the sliding support seat. During the adjustment process, the distance of the grounding rod body is controlled by aligning the pointer on the fixed plate with the scale plate. After determining the detection position, the electric telescopic rod 1 is started to drive the grounding rod body on the lifting support plate to be inserted into the ground surface, and then the two ends of the wire are connected to the ground resistance meter and the grounding rod body respectively. Through the troubleshooting module, multi-point detection of the ground resistance is realized, thereby improving the accuracy of the troubleshooting, reducing the labor of the detection personnel, and improving the efficiency of fault troubleshooting.

[0012] In a preferred embodiment, two connecting rods are fixedly connected to the sides of the two L brackets, and the other sides of the multiple connecting rods are fixedly connected to the same hollow circular air inflation frame, and air inflation holes are evenly spaced on the sides of the hollow circular air inflation frame.

[0013] In a preferred embodiment, a protective frame is fixedly connected to the hollow circular air inflation frame, and drainage grooves are equidistantly provided on the protective frame. A pump body is fixedly connected to one of the L brackets, and the air inflation end of the pump body is connected to the interior of the hollow circular air inflation frame through an air inflation pipe, and the air inlet end of the pump body is fixedly connected to the air inlet pipe.

[0014] By providing a hollow circular air inflation frame, a pump body, an air inflation pipe and a protective frame, when the ground resistance measuring instrument is used, the ground resistance measuring instrument is protected by the protective frame to avoid collision. At the same time, when used in the rainy season, rainwater is discharged through the drainage groove on the protective frame, and the pump body is started at the same time, and gas is blown into the hollow circular air inflation frame through the air inflation pipe, so that the air inflation holes on the hollow circular air inflation frame blow the rainwater falling from the drainage groove to a position away from the ground resistance measuring instrument, thereby preventing the ground resistance measuring instrument from being damaged by rain and moisture.

[0015] In a preferred solution, a hollow water drum frame is fixedly connected to the bottom of the tooling support plate, and a water inlet is opened on the side of the hollow water drum frame, a water inlet pipe is fixedly connected inside the water inlet, a water outlet is opened at the bottom of the hollow water drum frame, a hollow water drum circular tube is fixedly connected inside the water outlet, water spray outlets are opened at equal distances on the side of the hollow water drum circular tube, and nozzles are fixedly connected inside the multiple water spray outlets.

[0016] By providing the hollow water-drum frame, the hollow water-drum circular tube and the nozzle, when the grounding rod body is changed in position, water is sprayed through the nozzle on the hollow water-drum circular tube, thereby cleaning the grounding rod body.

[0017] The method for using the device for locating and troubleshooting single-pole grounding faults in the DC area of ​​a photovoltaic substation includes the following steps: Step 1: When using a ground resistance meter to detect the ground resistance of the DC zone of a photovoltaic power station, first move the tooling support plate to the ground position of the DC zone, then place the grounding rod body inside the rubber soft plate, and then start the electric telescopic rod 2, so that the electric telescopic rod 2 drives the rubber soft plate on the clamping slide to clamp and fix the grounding rod body; Step 2: The electric drive rod drives the adjusting gear rod to move in the guide track, so that the adjusting gear rod drives the linkage gear 1 to rotate the adjusting cylinder. When the adjusting cylinder rotates, the angle adjusting support rod drives the linkage gear 2 at the two top ends of the angle adjusting support rod to rotate under the limit of the limit circular gear rod, so that the rotating circular rod drives the pushing circular plate so that the push-pull rod adjusts the position of the sliding support seat. During the adjustment process, the distance of the grounding rod body is controlled by aligning the pointer on the fixed plate with the scale plate; Step 3: After determining the detection position, start the electric telescopic rod to drive the grounding rod body on the lifting support plate to insert into the ground surface, and then connect the two ends of the wire to the ground resistance meter and the grounding rod body respectively.

[0018] From the above, it can be seen that the device for locating and troubleshooting single-pole grounding faults in the DC zone of a photovoltaic substation provided by the present invention has the beneficial effect of realizing multi-point detection of ground resistance, thereby improving the accuracy of troubleshooting, reducing the labor of detection personnel, and improving the efficiency of fault troubleshooting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of the device for locating and troubleshooting single-pole grounding faults in the DC area of ​​a photovoltaic substation proposed by the present invention; Figure 2 A side structural schematic diagram of the device for locating and troubleshooting single-pole grounding faults in the DC area of ​​a photovoltaic substation proposed by the present invention; Figure 3 This is a schematic diagram of the structure of the troubleshooting module of the device for locating and troubleshooting single-pole grounding faults in the DC area of ​​a photovoltaic substation proposed by the present invention; Figure 4 for Figure 3 A schematic diagram of the enlarged structure of part A; Figure 5 This is a schematic diagram of the angle adjustment support rod structure of the device for locating and troubleshooting single-pole grounding faults in the DC area of ​​a photovoltaic substation proposed by the present invention; Figure 6 for Figure 5 A schematic diagram of the enlarged structure of part B; Figure 7 This is a schematic diagram of the protective frame structure of the device for locating and troubleshooting single-pole grounding faults in the DC zone of a photovoltaic substation proposed by the present invention.

[0020] In the figure: 1, tooling support plate; 2, universal moving wheel; 3, troubleshooting module; 301, limit circular gear rod; 302, mounting plate; 303, guide rail; 304, adjustment gear rod; 305, stop block; 306, electric drive rod; 307, adjustment cylinder; 308, linkage gear 1; 309, angle adjustment support rod; 310, sliding support seat; 311, rotating circular rod; 312, linkage gear 2; 313, pushing circular plate; 314, eccentric shaft; 315, rotating shaft; 316, push-pull rod; 317, fixed Fixed plate; 318, scale plate; 319, pointer; 320, electric telescopic rod one; 321, lifting support plate; 322, clamping slide; 323, electric telescopic rod two; 324, rubber soft board; 325, grounding rod body; 326, grounding resistance measuring instrument; 327, placement frame; 328, L bracket; 4, hollow water-drum frame; 5, water inlet pipe; 6, hollow water-drum circular pipe; 7, nozzle; 8, connecting rod; 9, protective frame; 10, pump body; 11, air-drum pipe; 12, air-inlet pipe; 13, hollow circular air-drum frame. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] The single-pole grounding fault locating and troubleshooting device in the DC zone of a photovoltaic substation disclosed in the present invention is mainly used in scenarios where a grounding resistance meter is generally used to detect the ground resistance in the DC zone of a photovoltaic power station when troubleshooting a grounding fault. Since the resistance of the ground in the DC zone of the photovoltaic power station needs to be detected, when using the existing grounding resistance meter, the detection personnel need to manually insert the ground rod into the ground and repeat the operation to detect the ground resistance, which increases the labor of the detection personnel and reduces the efficiency of fault detection.

[0023] Reference Figure 1-Figure 7A single-pole grounding fault location and troubleshooting device in a DC zone of a photovoltaic substation comprises a tooling support plate 1, a troubleshooting module 3 is arranged below the tooling support plate 1, and the troubleshooting module 3 comprises a mounting plate 302, a mounting circular hole is provided on the mounting plate 302, and a limited circular gear rod 301 is fixedly connected to the inner wall of the mounting circular hole, a circular hole 1 is provided on the mounting plate 302, and an adjusting cylinder 307 is connected to the inside of the circular hole 1 through a bearing, and a linkage gear 1 308 is fixedly connected to the outside of the adjusting cylinder 307, and a universal movable wheel 2 is fixedly connected to the bottom of the tooling support plate 1 at an equal distance.

[0024] Reference Figure 1-Figure 7 A guide rail 303 is fixedly connected to the mounting plate 302, and an adjusting gear rod 304 is slidably connected inside the guide rail 303, the tooth block end of the adjusting gear rod 304 is meshed with the linkage gear 1 308, a slot is provided on the side of the guide rail 303, a stop block 305 is fixedly connected to the side of the adjusting gear rod 304, two L brackets 328 are fixedly connected to the tooling support plate 1, the opposite side of the two L brackets 328 is fixedly connected to the same placement frame 327, a ground resistance meter 326 is placed inside the placement frame 327, an electric drive rod 306 is fixedly connected to the side of one of the L brackets 328, and the driving end of the electric drive rod 306 is fixedly connected to the side of the stop block 305.

[0025] Reference Figure 1-Figure 7 One end of the adjusting cylinder 307 is fixedly connected to an angle adjusting support rod 309, and the angle adjusting support rod 309 is provided with two sliding grooves, the interiors of the two sliding grooves are slidably connected to sliding support seats 310, and the two sliding support seats 310 are provided with round holes 2, and the interiors of the two round holes 2 are connected to rotating shafts 315 through bearings. The two top ends of the angle adjusting support rod 309 are provided with round holes 3, and the interiors of the two round holes 3 are connected to rotating round rods 311 through bearings. The sides of the angle adjusting support rod 309 are fixedly connected with two scale plates 318.

[0026] Reference Figure 1-Figure 7 The outside of the two rotating circular rods 311 are fixedly connected with the linkage gear 2 312, and the linkage gear 2 312 is meshed with the limiting circular gear rod 301. One end of the two rotating circular rods 311 is fixedly connected with a pushing circular plate 313. The two pushing circular plates 313 are provided with circular holes 4 away from the center of the circle. The inside of the two circular holes 4 are connected with eccentric shafts 314 through bearings. The eccentric shaft 314 and the outside of the rotating shaft 315 are movably connected with the same push-pull rod 316.

[0027] Reference Figure 1-Figure 7The bottoms of the two sliding support seats 310 are connected to the fixing plates 317 by bolts, and the bottoms of the two fixing plates 317 are fixedly connected to two electric telescopic rods 320, and the driving ends of the two electric telescopic rods 320 located on the same side are fixedly connected to the same lifting support plate 321, and the two fixing plates 317 are fixedly connected to the pointers 319.

[0028] Reference Figure 1-Figure 7 , the two lifting support plates 321 are each provided with a slide groove opening, and the inside of the two slide groove openings are slidably connected with a clamping slide 322, the sides of the two clamping slides 322 and the sides of the lifting support plates 321 are fixedly connected with a rubber soft plate 324, the sides of the two lifting support plates 321 are fixedly connected with an electric telescopic rod 2 323, the driving end of the electric telescopic rod 2 323 is fixedly connected to the side of the clamping slide 322, and the same grounding rod body 325 is placed inside the two rubber soft plates 324 on the same side.

[0029] In a specific application scenario, when using the ground resistance measuring instrument 326 to detect the ground resistance of the DC zone of the photovoltaic power station, first move the tool support plate 1 to the ground position of the DC zone, and then place the ground rod body 325 inside the rubber soft plate 324, and then start the electric telescopic rod 2 323, so that the electric telescopic rod 2 323 drives the rubber soft plate 324 on the clamping slide 322 to clamp and fix the ground rod body 325, and the electric drive rod 306 drives the adjusting gear rod 304 to move in the guide track 303, so that the adjusting gear rod 304 drives the linkage gear 1 308 to rotate the adjusting cylinder 307, and the adjusting cylinder 307 drives the angle when rotating. The angle adjustment support rod 309 moves in a circle, so that the linkage gear 2 312 at the two top ends of the angle adjustment support rod 309 rotates under the limit of the limit round gear rod 301, so that the rotating round rod 311 drives the pushing round plate 313 so that the push-pull rod 316 adjusts the position of the sliding support seat 310. During the adjustment process, the distance of the grounding rod body 325 is controlled by aligning the pointer 319 on the fixed plate 317 with the scale plate 318. After determining the detection position, the electric telescopic rod 1 320 is started to drive the grounding rod body 325 on the lifting support plate 321 to be inserted into the ground, and then the two ends of the wire are connected to the ground resistance meter 326 and the grounding rod body 325 respectively.

[0030] Reference Figure 1 and Figure 7 Two connecting rods 8 are fixedly connected to the sides of the two L brackets 328, and the other sides of the multiple connecting rods 8 are fixedly connected to the same hollow circular air inflation frame 13, and air inflation holes are evenly spaced on the sides of the hollow circular air inflation frame 13.

[0031] Reference Figure 7A protective frame 9 is fixedly connected to the hollow circular air inflation frame 13, and drainage grooves are equidistantly provided on the protective frame 9. A pump body 10 is fixedly connected to one of the L brackets 328, and the air inflation end of the pump body 10 is connected to the interior of the hollow circular air inflation frame 13 through an air inflation pipe 11, and the air inlet end of the pump body 10 is fixedly connected to an air inlet pipe 12.

[0032] In a specific application scenario, when the ground resistance meter 326 is used, the ground resistance meter 326 is protected by the protective frame 9 to avoid collision. At the same time, when used in the rainy season, rainwater is discharged through the drainage groove on the protective frame 9. At the same time, the pump body 10 is started, and gas is blown into the hollow circular air blowing frame 13 through the air blowing pipe 11, so that the air blowing holes on the hollow circular air blowing frame 13 blow the rainwater falling from the drainage groove to a position away from the ground resistance meter 326, so as to avoid damage to the ground resistance meter 326 caused by rain and moisture.

[0033] Reference Figure 1 and Figure 3 A hollow water drum frame 4 is fixedly connected to the bottom of the tooling support plate 1, and a water inlet is opened on the side of the hollow water drum frame 4, and a water inlet pipe 5 is fixedly connected inside the water inlet, a water outlet is opened at the bottom of the hollow water drum frame 4, and a hollow water drum circular tube 6 is fixedly connected inside the water outlet, and water spray outlets are opened at equal distances on the side of the hollow water drum circular tube 6, and nozzles 7 are fixedly connected inside the multiple water spray outlets.

[0034] In a specific application scenario, when the ground rod body 325 is changed in position, water is sprayed through the nozzle 7 on the hollow water-drum circular tube 6 to clean the ground rod body 325 .

[0035] The method for using the device for locating and troubleshooting single-pole grounding faults in the DC area of ​​a photovoltaic substation includes the following steps: Step 1: When using the ground resistance measuring instrument 326 to detect the ground resistance of the DC zone of the photovoltaic power station, first move the tooling support plate 1 to the ground position of the DC zone, then place the ground rod body 325 inside the rubber soft plate 324, and then start the electric telescopic rod 2 323, so that the electric telescopic rod 2 323 drives the rubber soft plate 324 on the clamping slide 322 to clamp and fix the ground rod body 325; Step 2: The electric drive rod 306 drives the adjusting gear rod 304 to move in the guide track 303, so that the adjusting gear rod 304 drives the linkage gear 1 308 to rotate the adjusting cylinder 307. When the adjusting cylinder 307 rotates, the angle adjusting support rod 309 is driven to move in a circle, so that the linkage gear 2 312 at the two top ends of the angle adjusting support rod 309 rotates under the limit of the limit circular gear rod 301, so that the rotating circular rod 311 drives the pushing circular plate 313 so that the push-pull rod 316 adjusts the position of the sliding support seat 310. During the adjustment process, the distance of the grounding rod body 325 is controlled by aligning the pointer 319 on the fixed plate 317 with the scale plate 318; Step 3: After determining the detection position, start the electric telescopic rod 320 to drive the grounding rod body 325 on the lifting support plate 321 to be inserted into the ground surface, and then connect the two ends of the wire to the ground resistance meter 326 and the grounding rod body 325 respectively.

[0036] Working principle: When using the ground resistance measuring instrument 326 to detect the ground resistance of the DC zone of the photovoltaic power station, first move the tool support plate 1 to the ground position of the DC zone, and then place the ground rod body 325 inside the rubber soft plate 324, and then start the electric telescopic rod 2 323, so that the electric telescopic rod 2 323 drives the rubber soft plate 324 on the clamping slide 322 to clamp and fix the ground rod body 325, and the electric driving rod 306 drives the adjusting gear rod 304 to move in the guide track 303, so that the adjusting gear rod 304 drives the linkage gear 1 308 to rotate the adjusting cylinder 307, and the adjusting cylinder 307 drives the angle adjustment support rod 309 to move in a circle when rotating, so that the linkage gear 2 312 at the two top ends of the angle adjustment support rod 309 rotates under the limit of the limit circular gear rod 301, so that the rotating circular rod 311 drives the pushing circular plate 313 to make the push-pull rod 316 adjust the position of the sliding support seat 310, and the fixed plate 317 is used during the adjustment process. The pointer 319 is aligned with the scale plate 318 to control the distance of the ground rod body 325. After determining the detection position, the electric telescopic rod 320 is started to drive the ground rod body 325 on the lifting support plate 321 to be inserted into the ground surface, and then the two ends of the wire are connected to the ground resistance measuring instrument 326 and the ground rod body 325 respectively. When using the ground resistance measuring instrument 326, the ground resistance measuring instrument 326 is protected by the protective frame 9 to avoid collision. At the same time, when used in the rainy season, rainwater is discharged through the drainage groove on the protective frame 9. At the same time, the pump body 10 is started, and gas is blown into the hollow circular air blowing frame 13 through the air blowing pipe 11, so that the air blowing holes on the hollow circular air blowing frame 13 blow the rainwater falling from the drainage groove to a position away from the ground resistance measuring instrument 326, so as to avoid the ground resistance measuring instrument 326 from being damaged by rain and moisture. When the ground rod body 325 is changed, water is sprayed through the nozzle 7 on the hollow water blowing circular pipe 6, thereby cleaning the ground rod body 325.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for locating and troubleshooting single-pole grounding faults in a DC zone of a photovoltaic substation, comprising a tooling support plate (1), characterized in that: A troubleshooting module (3) is arranged below the tooling support plate (1), and the troubleshooting module (3) comprises a mounting plate (302), a mounting circular hole is provided on the mounting plate (302), and a limited circular gear rod (301) is fixedly connected to the inner wall of the mounting circular hole, a circular hole 1 is provided on the mounting plate (302), an adjusting cylinder (307) is connected to the inside of the circular hole 1 via a bearing, and a linkage gear 1 (308) is fixedly connected to the outside of the adjusting cylinder (307), and a universal movable wheel (2) is fixedly connected to the bottom of the tooling support plate (1) at an equal distance.

2. The device for locating and troubleshooting single-pole grounding faults in the DC area of ​​a photovoltaic substation according to claim 1 is characterized in that: The mounting plate (302) is fixedly connected to a guide rail (303), and an adjusting gear rod (304) is slidably connected inside the guide rail (303), the gear block end of the adjusting gear rod (304) meshes with a linkage gear 1 (308), a notch is provided on the side of the guide rail (303), and a stop block (305) is fixedly connected to the side of the adjusting gear rod (304), and two L brackets (328) are fixedly connected to the tooling support plate (1), and the same placement frame (327) is fixedly connected to the opposite side of the two L brackets (328), and a ground resistance measuring instrument (326) is placed inside the placement frame (327), and an electric drive rod (306) is fixedly connected to the side of one of the L brackets (328), and the driving end of the electric drive rod (306) is fixedly connected to the side of the stop block (305).

3. The device for locating and troubleshooting single-pole grounding faults in the DC area of ​​a photovoltaic substation according to claim 2, characterized in that: One end of the adjustment cylinder (307) is fixedly connected to an angle adjustment support rod (309), and the angle adjustment support rod (309) is provided with two slide grooves, the interiors of the two slide grooves are slidably connected to a sliding support seat (310), the two sliding support seats (310) are provided with a second circular hole, the interiors of the two second circular holes are connected to a rotating shaft (315) via a bearing, the two top ends of the angle adjustment support rod (309) are provided with a third circular hole, the interiors of the two third circular holes are connected to a rotating circular rod (311) via a bearing, and the side surfaces of the angle adjustment support rod (309) are fixedly connected to two scale plates (318).

4. The device for locating and troubleshooting single-pole grounding faults in the DC area of ​​a photovoltaic substation according to claim 3 is characterized in that: The exterior of the two rotating round rods (311) is fixedly connected to a linkage gear 2 (312), and the linkage gear 2 (312) is meshed with the limit round gear rod (301). One end of the two rotating round rods (311) is fixedly connected to a push circular plate (313). The two push circular plates (313) are provided with a circular hole 4 away from the center of the circle. The interior of the two circular holes 4 is connected to an eccentric shaft (314) through a bearing. The eccentric shaft (314) and the exterior of the rotating shaft (315) are movably connected by a push-pull rod (316).

5. The device for locating and troubleshooting single-pole grounding faults in the DC area of ​​a photovoltaic substation according to claim 4, characterized in that: The bottoms of the two sliding support seats (310) are both connected to a fixing plate (317) via bolts, and the bottoms of the two fixing plates (317) are both fixedly connected to two electric telescopic rods (320), the driving ends of the two electric telescopic rods (320) located on the same side are fixedly connected to the same lifting support plate (321), and the two fixing plates (317) are both fixedly connected to a pointer (319).

6. The device for locating and troubleshooting single-pole grounding faults in the DC area of ​​a photovoltaic substation according to claim 5, characterized in that: The two lifting support plates (321) are each provided with a slide groove opening, and the inside of the two slide groove openings is slidably connected to a clamping slide seat (322), the side surfaces of the two clamping slide seats (322) and the side surfaces of the lifting support plates (321) are fixedly connected to a rubber soft plate (324), the side surfaces of the two lifting support plates (321) are fixedly connected to an electric telescopic rod 2 (323), the driving end of the electric telescopic rod 2 (323) is fixedly connected to the side surface of the clamping slide seat (322), and the same grounding rod body (325) is placed inside the two rubber soft plates (324) located on the same side.

7. The device for locating and troubleshooting single-pole grounding faults in the DC area of ​​a photovoltaic substation according to claim 2, characterized in that: Two connecting rods (8) are fixedly connected to the sides of the two L brackets (328), and the other sides of the multiple connecting rods (8) are fixedly connected to the same hollow circular air inflation frame (13), and air inflation holes are evenly spaced on the sides of the hollow circular air inflation frame (13).

8. The device for locating and troubleshooting single-pole grounding faults in the DC area of ​​a photovoltaic substation according to claim 7, characterized in that: The hollow circular air-inflating frame (13) is fixedly connected to a protective frame (9), and drainage grooves are provided on the protective frame (9) at equal intervals. A pump body (10) is fixedly connected to one of the L brackets (328), and an air-inflating end of the pump body (10) is connected to the interior of the hollow circular air-inflating frame (13) via an air-inflating pipe (11), and an air-inlet end of the pump body (10) is fixedly connected to an air-inlet pipe (12).

9. The device for locating and troubleshooting single-pole grounding faults in the DC area of ​​a photovoltaic substation according to claim 8, characterized in that: The bottom of the tooling support plate (1) is fixedly connected to a hollow water drum frame (4), and a water inlet is provided on the side of the hollow water drum frame (4), and a water inlet pipe (5) is fixedly connected inside the water inlet; a water outlet is provided at the bottom of the hollow water drum frame (4), and a hollow water drum circular pipe (6) is fixedly connected inside the water outlet; water spraying ports are provided at equal distances on the side of the hollow water drum circular pipe (6), and nozzles (7) are fixedly connected inside the plurality of water spraying ports.

10. A method for using a device for locating and troubleshooting a single-pole grounding fault in a DC area of ​​a photovoltaic substation, using the device for locating and troubleshooting a single-pole grounding fault in a DC area of ​​a photovoltaic substation according to claim 6, characterized in that: The steps include: Step 1: When using a ground resistance measuring instrument (326) to detect the ground resistance of the DC zone of the photovoltaic power station, first move the tool support plate (1) to the ground position of the DC zone, then place the ground rod body (325) inside the rubber soft plate (324), and then start the electric telescopic rod second (323), so that the electric telescopic rod second (323) drives the rubber soft plate (324) on the clamping slide (322) to clamp and fix the ground rod body (325); Step 2: The electric drive rod (306) drives the adjusting gear rod (304) to move in the guide track (303), so that the adjusting gear rod (304) drives the linkage gear 1 (308) to rotate the adjusting cylinder (307). When the adjusting cylinder (307) rotates, it drives the angle adjustment support rod (309) to move in a circle, so that the linkage gear 2 (312) at the two top ends of the angle adjustment support rod (309) rotates under the limit of the limit circular gear rod (301), so that the rotating circular rod (311) drives the pushing circular plate (313) so that the push-pull rod (316) adjusts the position of the sliding support seat (310). During the adjustment process, the distance of the grounding rod body (325) is controlled by aligning the pointer (319) on the fixed plate (317) with the scale plate (318); Step 3: After determining the detection position, start the electric telescopic rod 1 (320) to drive the grounding rod body (325) on the lifting support plate (321) to be inserted into the ground surface, and then connect the two ends of the wire to the ground resistance measuring instrument (326) and the grounding rod body (325) respectively.

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