Automatic test system and method for distribution network impact test

Abstract

The invention discloses an automatic test system and method for a distribution network impact test, and relates to the technical field of lightning impuls.The automatic test system comprises an impact voltage generator, an output box is installed on the back face of the impact voltage generator, and a sliding frame is arranged on the back face of the impact voltage generator; transverse sliding grooves are symmetrically formed in the top end and the bottom end of the sliding frame, positioning sliding blocks are arranged on the inner sides of the transverse sliding grooves in a sliding mode, moving blocks are welded to the bottom ends of the positioning sliding blocks, clamping groove plates are welded to the side end faces of the moving blocks, and high-voltage wires are embedded into the inner sides of the clamping groove plates. According to the utility model, movement of an operator is reduced, cable loosening caused by touching the cable in the moving process of continuously plugging the cable by the operator is prevented, the operator is prevented from being stumbled and injured, the plugging force is ensured, the force applying direction is always stable in the plugging process, and the abrasion of the wiring terminal is further prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning impulse, in particular to an automated test system and method for a distribution network impulse test. Background Art

[0002] The lightning impulse test device is mainly used to simulate the impact of natural lightning impulse voltage on electrical equipment to test the insulation performance and voltage withstand capacity of the equipment. It is used for factory inspection and type testing of high-voltage electrical appliances such as transformers, reactors, mutual inductors, insulators, and bushings to ensure that the equipment can withstand lightning impulse voltage without being damaged during operation, ensuring the safe and stable operation of the power grid. The Chinese patent application number for "An outdoor movable impulse voltage generator and its use method" is: 202310298184.3. This patent uses the impulse voltage tester to transmit the leakage electricity to the conductive wire. The conductive wire transmits the electricity to the ground wire through the connector. The ground wire transmits the current to the ground to prevent leakage current from injuring workers.

[0003] However, most existing lightning impulse test devices manually connect the output impedance end of the storage resistor to the test equipment. The connection process not only requires the operator to move around multiple times and the operation steps are cumbersome, but each manual plugging and unplugging of the terminals will cause uneven force on the power terminals, causing wear and failure, thereby affecting the authenticity of the experimental data. In order to avoid the above technical problems, it is indeed necessary to provide an automated test system and method for distribution network impulse testing to overcome the above-mentioned defects in the prior art. Summary of the Invention

[0004] The present invention provides an automated test system and method for distribution network impulse testing, which can effectively solve the problem proposed in the above background technology that most existing lightning impulse test devices manually connect the output impedance end of the storage resistor to the test equipment. The connection process not only requires the operator to move around many times and the operation steps are cumbersome, but also each manual plugging and unplugging of the terminal will cause the power terminal to be unevenly stressed and wear and fail, thereby affecting the authenticity of the experimental data.

[0005] To achieve the above object, the present invention provides the following technical solutions: an automated test system and method for a distribution network impulse test, comprising an impulse voltage generator, a self-connecting assembly being installed on the back of the impulse voltage generator;

[0006] The self-connecting assembly includes an output box;

[0007] An output box is installed on the back of the impulse voltage generator, and a sliding frame is provided on the back of the impulse voltage generator. Sliding grooves are provided at the four inner corners of the sliding frame, and a stabilizing slide bar is slidably installed on the inner side of the sliding groove. Transverse slide grooves are symmetrically provided at the top and bottom ends of the sliding frame, and a positioning slider slides on the inner side of the transverse slide groove. A moving block is welded to the bottom end of the positioning slider, and a clamping slot plate is welded to the side end surface of the moving block, and a high-voltage wiring is embedded in the inner side of the clamping slot plate.

[0008] A driving screw is rotatably installed on the inner side of the sliding frame, a driving motor is installed on the side end face of the sliding frame, a mounting slot plate is installed on the back side of the impulse voltage generator, a hydraulic cylinder is installed on the inner side of the mounting slot plate, and a reverse telescopic rod is connected to the telescopic end of the hydraulic cylinder.

[0009] Preferably, a high-pressure port is installed on the inner side of the output box, a compensation port is installed on the middle part of the inner side of the output box, a low-pressure port is installed on the inner side of the output box, a limit block is installed on the inner side of the sliding frame, a movable groove is provided at the middle part of the side end face of the limit block corresponding to the driving screw, and a low-voltage wiring is threadedly connected at the inner top position of the limit block.

[0010] Preferably, a clamping block is welded to the front end face of the movable block, one end of the high-voltage wiring is connected to a connecting terminal, one end of the connecting terminal is installed with a test device placement box, a vacuum pump is installed on the side end face of the test device placement box, a placement chamber is opened on the inner side of the test device placement box, and a sealing top cover is clamped on the top of the test device placement box.

[0011] Preferably, an oscilloscope is installed on the front end surface of the impulse voltage generator, an operation panel is installed at the top position of the front surface of the impulse voltage generator, and a waveform display is installed on the side end surface of the impulse voltage generator.

[0012] Preferably, two hydraulic cylinders are installed, and the two hydraulic cylinders are symmetrically installed on the back of the impulse voltage generator, and the reverse telescopic rods are welded to the sliding frame.

[0013] Preferably, one end of the driving screw is connected to the transmission end of the driving motor, the input ends of the driving motor and the hydraulic cylinder are electrically connected to the output end of the internal controller, the output end of the oscilloscope is electrically connected to the input end of the waveform display, and the output end of the operation panel is electrically connected to the input end of the internal controller.

[0014] Preferably, a protection component is installed at the bottom of the impulse voltage generator;

[0015] The protection assembly includes a fixing seat;

[0016] The bottom end of the impulse voltage generator is welded with a fixing seat, the inner side of the fixing seat is provided with a rotating groove, the inner side of the rotating groove is rotatably mounted with a rotating shaft, the outer side of the rotating shaft is welded with a rotating plate, one end surface of the rotating plate is welded with an operating standing plate, and the four corners of the bottom end of the impulse voltage generator are welded with supporting feet;

[0017] The top of the operating standing plate is bonded with a non-slip rubber pad, and a pressure plate is welded on the outer side of the rotating shaft at a position symmetrical to the rotating plate, and a counterweight is installed on the top of the pressure plate;

[0018] A mounting groove cylinder is welded at the bottom position of the positive end surface of the impulse voltage generator, a sliding cylinder is embedded in the inner side of the mounting groove cylinder, a compression chamber is provided on the inner side of the sliding cylinder, an extrusion rod is slidably installed on the inner side of the compression chamber, a sealing rubber pad is bonded to the top end of the extrusion rod, an air guide hole is provided at the middle position of the top end of the sliding cylinder, a proximity switch is installed at the bottom position of the front face of the impulse voltage generator, a warning light is installed at the top of the impulse voltage generator, an emergency stop switch is installed at the top of the front face of the impulse voltage generator, and a power indicator light is installed at the top of the emergency stop switch on the front face of the impulse voltage generator.

[0019] Preferably, there are two fixed seats welded, and the two fixed seats are symmetrically welded to the bottom end of the impulse voltage generator, and the inner diameter of the rotating groove is equal to the outer diameter of the rotating shaft.

[0020] Preferably, two sliding cylinders are installed, and the two sliding cylinders are symmetrically installed on the front of the impulse voltage generator. The output ends of the warning light and the power indicator light are electrically connected to the output ends of the power controller, and the output ends of the proximity switch and the emergency stop switch are electrically connected to the input ends of the power controller.

[0021] Preferably, a specific method for using an automated test device for a distribution network impact test comprises the following steps:

[0022] S1. First, the operator steps on the operating stand before adjusting the value. At this time, the operating stand is away from the proximity switch, thereby stopping the proximity switch from being triggered and disconnecting the main power supply from the internal discharge resistor.

[0023] S2. The operator then inserts the other ends of the high-voltage and low-voltage wires into the inner sides of the connection terminals, clamps the alligator clips connected to the connection terminals to the electrical connection ends of the device under test, and reattaches the sealed top cover to the top of the device under test box.

[0024] S3. Next, the impulse voltage and impulse times are set through the operation panel, and then the moving block is controlled to slide inside the sliding frame. After sliding a certain distance, one end of the high-voltage wiring will align with one of the high-voltage ports, thereby stopping the sliding of the moving block;

[0025] S4. Then, after the value is adjusted, the operator walks from the top of the operating stand to a safe position. The operating stand will reattach to the bottom of the impulse voltage generator and trigger the proximity switch to charge the resistor and control the hydraulic cylinder to retract to connect the circuit.

[0026] S5. Finally, the impulse voltage generator is used to simulate the occurrence of the impulse. At this time, the impulse results can be observed through the oscilloscope and waveform display, thereby completing the simulated impulse experiment of the distribution network components.

[0027] Compared with the prior art, the present invention has the following beneficial effects: the present invention has a scientific and reasonable structure and is safe and convenient to use:

[0028] 1. It is equipped with a self-connecting component. According to the different specifications of the tested device, high-voltage ports of different specifications can be selected, so as to simulate the impact on the tested device in the most reasonable impact range. At this time, the operator only needs to select the high-voltage port to be output through the operation panel, and there is no need to walk back and forth to plug and unplug the high-voltage wiring. At this time, the movement of the operator can be reduced. The operator only needs to connect the other end of the high-voltage wiring and the low-voltage wiring to the tested device through the connecting terminal, which reduces the movement of the operator and prevents the operator from touching the cable during the movement process of constantly plugging and unplugging the cable, causing the cable to become loose, and also prevents the operator from tripping and getting injured, thereby ensuring the accuracy of the experimental results and preventing the connection end of the high-voltage wiring from being damaged due to movement and pulling. In addition, the process of plugging and unplugging the high-voltage wiring is completely carried out by the movement of the sliding frame, which not only ensures the plugging and unplugging force, but also the force direction is always stable during the plugging and unplugging process, further preventing the wear of the terminal block, preventing the damage of the high-voltage wiring, and ensuring the accuracy of the test results.

[0029] The operator then decides whether to use a vacuum pump to evacuate the inside of the test device placement box based on the use environment of the test device. If the test device cannot withstand the simulated lightning strike during the test, the test device will be in danger of short circuit and fire. At this time, the test device placement box can be quickly evacuated to prevent the test device from catching fire, further ensuring the safety of the test.

[0030] 2. A protection component is provided to control the connection and disconnection of the circuit by the position of the operating stand plate. When the operator operates the operation panel at close range, he steps on the operating stand plate to move the operating stand plate away from the proximity switch. At this time, all high-voltage circuits can be disconnected to ensure the operator's operation safety. After the value is set, when the operator is away from the impulse voltage generator, the operating stand plate will slowly move towards the proximity switch under the action of the extrusion rod, providing sufficient time for the operator to evacuate to a safe distance, preventing the electromagnetic radiation generated during the simulation of lightning strikes from damaging human health, and further ensuring the safety of the operation process.

[0031] To summarize, if the device under test is overloaded and short-circuited during the test, the operator can quickly step on the operating stand to push out the telescopic end of the hydraulic cylinder, disconnecting the device under test from the impulse voltage generator equipment, and at the same time press the emergency stop switch to disconnect all high-voltage power except low-voltage power such as the oscilloscope, operation panel and waveform display, thereby further ensuring the safety of the equipment and operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0033] In the attached figure:

[0034] Figure 1 It is a structural schematic diagram of the present invention;

[0035] Figure 2 This is a schematic diagram of the installation structure of the waveform display of the present invention;

[0036] Figure 3 Schematic diagram of the installation structure of the high-pressure port of the present invention;

[0037] Figure 4 It is a structural diagram of the self-connecting assembly of the present invention;

[0038] Figure 5 This is a schematic diagram of the installation structure of the moving block of the present invention;

[0039] Figure 6 Schematic diagram of the installation structure of the vacuum pump of the present invention;

[0040] Figure 7 It is a schematic diagram of the installation structure of the fixing base of the present invention;

[0041] Figure 8 It is a schematic diagram of the installation structure of the rotating plate of the present invention;

[0042] Figure 9It is a schematic structural diagram of the protection component of the present invention;

[0043] Figure 10 Schematic diagram of the installation structure of the sealing rubber pad of the present invention;

[0044] Figure 11 It is a schematic diagram of the method of using the present invention;

[0045] Numbers in the figure: 1, impulse voltage generator;

[0046] 2. Self-connecting components; 201. Output box; 202. High-pressure port; 203. Compensation port; 204. Low-pressure port; 205. Sliding frame; 206. Sliding slot; 207. Stabilizing slide bar; 208. Horizontal slide; 209. Positioning slide; 210. Moving block; 211. Snap-in slot plate; 212. Snap-in block; 213. High-voltage wiring; 214. Low-voltage wiring; 215. Driving screw; 216. Driving motor; 217. Mounting slot plate; 218. Hydraulic cylinder; 219. Reverse telescopic rod; 220. Connecting terminal; 221. Test device placement box; 222. Vacuum pump; 223. Placement chamber; 224. Sealed top cover; 225. Oscilloscope; 226. Operation panel; 227. Waveform display; 228. Limit block; 229. Movable slot;

[0047] 3. Protection assembly; 301. Fixed seat; 302. Rotating shaft; 303. Rotating plate; 304. Operating standing plate; 305. Support foot; 306. Anti-slip rubber pad; 307. Pressure plate; 308. Counterweight; 309. Mounting groove cylinder; 310. Sliding cylinder; 311. Compression chamber; 312. Extrusion rod; 313. Sealing rubber pad; 314. Air guide hole; 315. Proximity switch; 316. Power controller; 317. Warning light; 318. Rotating groove; 319. Emergency stop switch; 320. Power indicator light. DETAILED DESCRIPTION

[0048] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0049] Example: Figure 1-10 As shown, the present invention provides a technical solution, an automated test device for distribution network impulse test, comprising an impulse voltage generator 1, a self-connecting component 2 is installed on the back of the impulse voltage generator 1;

[0050] The self-connecting assembly 2 includes an output box 201, a high-pressure port 202, a compensation port 203, a low-pressure port 204, a sliding frame 205, a sliding groove 206, a stabilizing slide bar 207, a transverse slide groove 208, a positioning slider 209, a moving block 210, a snap-in slot plate 211, a snap-in block 212, a high-voltage wiring 213, a low-voltage wiring 214, a driving screw 215, a driving motor 216, a mounting slot plate 217, a hydraulic cylinder 218, a reverse telescopic rod 219, a connecting terminal 220, a test device placement box 221, a vacuum pump 222, a placement chamber 223, a sealing top cover 224, an oscilloscope 225, an operation panel 226, a waveform display 227, a limit block 228 and a movable slot 229;

[0051] An output box 201 is mounted on the back of the impulse voltage generator 1. A sliding frame 205 is also mounted on the back of the impulse voltage generator 1. Sliding grooves 206 are provided at the four inner corners of the sliding frame 205. Stabilizing slide bars 207 are slidably mounted on the inner sides of the sliding grooves 206. Transverse sliding grooves 208 are symmetrically provided at the top and bottom ends of the sliding frame 205. A positioning slider 209 slides on the inner sides of the transverse sliding grooves 208. A moving block 210 is welded to the bottom end of the positioning slider 209. A snap-fitting slot plate 211 is welded to the side end surface of the moving block 210. A high-voltage wiring 213 is embedded in the inner side of the snap-fitting slot plate 211.

[0052] A driving screw rod 215 is rotatably installed on the inner side of the sliding frame 205, and a driving motor 216 is installed on the side end face of the sliding frame 205. A mounting slot plate 217 is installed on the back of the impulse voltage generator 1, and a hydraulic cylinder 218 is installed on the inner side of the mounting slot plate 217. Two hydraulic cylinders 218 are installed, and the two hydraulic cylinders 218 are symmetrically installed on the back of the impulse voltage generator 1. The reverse telescopic rods 219 are welded to the sliding frame 205 to facilitate accurate connection of the circuit. The telescopic end of the hydraulic cylinder 218 is connected to the reverse telescopic rod 219.

[0053] A high-pressure port 202 is installed on the inner side of the output box 201, a compensation port 203 is installed in the middle of the inner side of the output box 201, a low-pressure port 204 is installed on the inner side of the output box 201, and a limit block 228 is installed on the inner side of the sliding frame 205. A movable groove 229 is provided at the middle of the side end surface of the limit block 228 corresponding to the driving screw 215, and a low-voltage wiring 214 is threadedly connected at the inner top position of the limit block 228.

[0054] A clamping block 212 is welded to the front end face of the moving block 210, one end of the high-voltage wiring 213 is connected to the connecting terminal 220, one end of the connecting terminal 220 is installed with a test device placement box 221, a side end face of the test device placement box 221 is installed with a vacuum pump 222, a placement chamber 223 is opened on the inner side of the test device placement box 221, and a sealing top cover 224 is clamped on the top of the test device placement box 221.

[0055] An oscilloscope 225 is installed on the front end surface of the impulse voltage generator 1 , an operation panel 226 is installed at the top position of the front surface of the impulse voltage generator 1 , and a waveform display 227 is installed on the side end surface of the impulse voltage generator 1 .

[0056] One end of the driving screw 215 is connected to the transmission end of the driving motor 216, the input ends of the driving motor 216 and the hydraulic cylinder 218 are electrically connected to the output end of the internal controller, the output end of the oscilloscope 225 is electrically connected to the input end of the waveform display 227, and the output end of the operation panel 226 is electrically connected to the input end of the internal controller.

[0057] A protection component 3 is installed at the bottom of the impulse voltage generator 1;

[0058] The protection assembly 3 includes a fixed base 301, a rotating shaft 302, a rotating plate 303, an operating stand plate 304, a support leg 305, an anti-slip rubber pad 306, a pressure plate 307, a counterweight 308, a mounting groove cylinder 309, a sliding cylinder 310, a compression chamber 311, an extrusion rod 312, a sealing rubber pad 313, an air guide hole 314, a proximity switch 315, a power controller 316, a warning light 317, a rotating groove 318, an emergency stop switch 319, and a power indicator light 320.

[0059] A fixing base 301 is welded to the bottom end of the impulse voltage generator 1. A rotation groove 318 is opened on the inner side of the fixing base 301. There are two fixing bases 301 welded, and the two fixing bases 301 are symmetrically welded to the bottom end of the impulse voltage generator 1. The inner diameter of the rotation groove 318 is equal to the outer diameter of the rotation shaft 302, which is convenient for rotation. The rotation shaft 302 is rotatably mounted on the inner side of the rotation groove 318. A rotating plate 303 is welded to the outer side of the rotation shaft 302. An operating stand plate 304 is welded to one end surface of the rotating plate 303. Support legs 305 are welded to the four corners of the bottom end of the impulse voltage generator 1.

[0060] The top of the operating standing plate 304 is bonded with a non-slip rubber pad 306, and a pressure plate 307 is welded on the outer side of the rotating shaft 302 at a position symmetrical to the rotating plate 303. A counterweight block 308 is installed on the top of the pressure plate 307;

[0061] A mounting groove cylinder 309 is welded at the bottom position of the positive end surface of the impulse voltage generator 1, and a sliding cylinder 310 is embedded in the inner side of the mounting groove cylinder 309. A compression chamber 311 is provided on the inner side of the sliding cylinder 310. An extrusion rod 312 is slidably installed on the inner side of the compression chamber 311. A sealing rubber pad 313 is bonded to the top of the extrusion rod 312. An air guide hole 314 is provided at the middle position of the top of the sliding cylinder 310. A proximity switch 315 is installed at the bottom end of the impulse voltage generator 1. A power controller 316 is installed at the bottom position of the front of the impulse voltage generator 1. A warning light 317 is installed on the top, an emergency stop switch 319 is installed on the top of the front of the impulse voltage generator 1, a power indicator light 320 is installed on the front of the impulse voltage generator 1 at the top of the emergency stop switch 319, two sliding cylinders 310 are installed, and the two sliding cylinders 310 are symmetrically installed on the front of the impulse voltage generator 1. The output ends of the warning light 317 and the power indicator light 320 are electrically connected to the input ends of the power controller 316, and the output ends of the proximity switch 315 and the emergency stop switch 319 are electrically connected to the output end of the power controller 316, which is conducive to safe switching of the circuit.

[0062] like Figure 11 As shown, a specific method for using an automated test device for a distribution network impact test includes the following steps:

[0063] S1. First, the operator steps on the operating stand plate 304 before adjusting the value. At this time, the operating stand plate 304 moves away from the proximity switch 315, thereby stopping the proximity switch 315 from being triggered and disconnecting the main power supply from the internal discharge resistor.

[0064] S2. The operator then inserts the other ends of the high-voltage wiring 213 and the low-voltage wiring 214 into the inner sides of the connection terminal 220, clamps the alligator clip connected to the connection terminal 220 to the electrical connection end of the device under test, and reattaches the sealing top cover 224 to the top of the device under test placement box 221.

[0065] S3. Next, the impulse voltage and impulse number are set through the operation panel 226. Then, the movable block 210 is controlled to slide inside the sliding frame 205. After sliding a certain distance, one end of the high-voltage wire 213 is aligned with one of the high-voltage ports 202, thereby stopping the sliding of the movable block 210.

[0066] S4. After the value is adjusted, the operator walks from the top of the operating stand 304 to a safe position. The operating stand 304 will be reattached to the bottom of the impulse voltage generator 1, and the proximity switch 315 will be triggered to charge the resistor and control the hydraulic cylinder 218 to retract and connect the circuit.

[0067] S5. Finally, the impulse voltage generator 1 is used to simulate the occurrence of an impulse. At this time, the impulse result can be observed through the oscilloscope 225 and the waveform display 227, thereby completing the simulated impulse experiment of the distribution network component.

[0068] The working principle and usage process of the present invention are as follows: First, when using the impulse voltage generator 1 for the first time, prepare two new high-voltage wires 213 and low-voltage wires 214. Then, tighten the terminal of the low-voltage wire 214 to the inner side of the limit block 228 to fix one end of the low-voltage wire 214. Then, respectively insert the two connecting ends of the high-voltage wire 213 into the inner side of the two clamping slots 211 on one side of the moving block 210. Then, insert the wire portion of the high-voltage wire 213 into the inner side of the clamping block 212 to fix the high-voltage wire 213.

[0069] Next, the operator inserts the other ends of the high-voltage wiring 213 and the low-voltage wiring 214 into the inner side of the connection terminal 220, and lifts the sealing top cover 224 to place the device under test inside the device placement box 221. Then, the operator clamps the alligator clip connected to the connection terminal 220 to the electrical connection end of the device under test. The operator then re-attaches the sealing top cover 224 to the top of the device placement box 221, thereby sealing the device placement box 221. At this point, the preliminary preparations are completed.

[0070] The operator then decides whether to use the vacuum pump 222 to evacuate the interior of the device under test box 221 based on the use environment of the device under test. If the device under test cannot withstand the simulated lightning strike during the test, the device under test may short-circuit and cause a fire hazard. In this case, the device under test box 221 can be quickly evacuated to prevent the device from catching fire, thereby further ensuring the safety of the test.

[0071] Then the operator can set the impulse voltage and impulse times through the operation panel 226, and at this time select the high-voltage port 202 with the appropriate output according to the specifications of the device under test. At this time, after the selection is made, the control driving motor 216 is started, so that the driving screw 215 is driven to rotate by the driving motor 216, and the moving block 210 can be driven to slide on the inner side of the sliding frame 205. Since the two positioning sliders 209 are slidably connected to the horizontal sliding groove 208, the moving block 210 can slide smoothly on the inner side of the sliding frame 205. At this time, the moving block 210 can drive one end of the high-voltage wire 213 to slide on the inner side of the sliding frame 205, and after sliding a certain distance, one end of the high-voltage wire 213 will be aligned with one of the high-voltage ports 202, thereby stopping the sliding of the moving block 210. At the same time, since a movable groove 229 is provided on the inner side of the limit block 228, the limit block 228 will not move when the driving screw 215 rotates. At this time, one end of the low-voltage wire 214 will always be aligned with the low-pressure port 204.

[0072] Then, after passing the detection of the protection component 3, the hydraulic cylinders 218 inside the two mounting slot plates 217 are controlled to retract at the same time, thereby pushing the sliding frame 205 to slide through the reverse telescopic rod 219. At this time, the sliding frame 205 will slide stably toward the side of the impulse voltage generator 1 on the outside of the stabilizing slide bar 207 through the sliding groove 206. At this time, the moving block 210 and the limit block 228 can be driven to slide toward the high-pressure port 202 and the low-pressure port 204. And since the above steps have completed the calibration of the high-voltage wiring 213, the low-voltage wiring 214 and the high-pressure port 202, the low-pressure port 204 connection end, so after the sliding frame 205 moves a certain distance, the connection terminals of the high-voltage wiring 213 and the low-voltage wiring 214 will be accurately inserted into the inner side of the high-pressure port 202 and the low-pressure port 204. At this time, the impulse is simulated by the impulse voltage generator 1. At this time, the impact results can be observed through the oscilloscope 225 and the waveform display 227, thereby completing the simulated impact experiment of the distribution network component;

[0073] According to the different specifications of the tested device, high-voltage ports 202 of different specifications can be selected, so as to simulate the impact on the tested device in the most reasonable impact range. At this time, the operator only needs to select the high-voltage port 202 that needs to be output through the operation panel 226, and does not need to move back and forth to plug and unplug the high-voltage wiring 213. At this time, the movement of the operator can be reduced. The operator only needs to connect the other end of the high-voltage wiring 213 and the low-voltage wiring 214 to the tested device through the connection terminal 220, reducing the movement of the operator, preventing the operator from constantly plugging and unplugging the cables and touching the cables, which may cause the cables to become loose, and preventing the operator from tripping and getting injured, thereby ensuring the accuracy of the experimental results, and preventing the connection end of the high-voltage wiring 213 from being damaged due to movement and pulling, and the process of plugging and unplugging the high-voltage wiring 213 is completely carried out by the movement of the sliding frame 205, which not only ensures the plugging and unplugging force, but also the force direction is always stable during the plugging and unplugging process, further preventing the wear of the terminal block, preventing the damage to the high-voltage wiring 213, and ensuring the accuracy of the test results;

[0074] Next, before adjusting the numerical value, the operator first steps on the operating stand plate 304. At this time, the operating stand plate 304 moves away from the proximity switch 315, thereby stopping the proximity switch 315 from being triggered. After receiving the signal, the power controller 316 controls the main power supply to disconnect from the internal discharge resistor, thereby preventing the discharge resistor from accidentally discharging. Subsequently, the operating stand plate 304 moves downward, which drives the rotating plate 303 to move downward, and drives the rotating shaft 302 to rotate inside the fixed base 301 through the rotating slot 318. At this time, the pressure plate 307 and the counterweight block 308 are lifted upward. At this time, the operator can stand on the top of the non-slip rubber pad 306 to operate the operation panel 226;

[0075] After the value is adjusted, the operator walks from the top of the operating standing plate 304 to a safe position. At this time, under the pressure of the counterweight block 308, the pressure plate 307 will move downward, thereby driving the rotating plate 303 and the operating standing plate 304 to move upward. At this time, the operating standing plate 304 will contact the squeezing rod 312 and push it upward. At this time, the squeezing rod 312 will drive the sealing rubber pad 313 to quickly compress the air inside the compression chamber 311. At this time, a certain resistance will be formed during the compression process, thereby causing the squeezing rod 312 to move slowly, and causing the operating standing plate 304 to slowly rotate upward. Then a large amount of air will slowly be discharged from the air guide hole 314. When the squeezing rod 312 completely enters the compression chamber 311, the operating standing plate 304 will re-attach to the bottom end of the impulse voltage generator 1 and trigger the proximity switch 315 to charge the resistor and control the hydraulic cylinder 218 to retract to connect the circuit.

[0076] The connection and disconnection of the circuit are controlled by the position of the operating stand plate 304. When the operator operates the operating panel 226 at close range, he / she steps on the operating stand plate 304, thereby moving the operating stand plate 304 away from the proximity switch 315. At this time, all high-voltage circuits can be disconnected, ensuring the operator's operating safety. After the value is set, when the operator moves away from the impulse voltage generator 1, under the action of the squeezing rod 312, the operating stand plate 304 will slowly move toward the proximity switch 315, providing sufficient time for the operator to evacuate to a safe distance, preventing electromagnetic radiation generated during the simulation of lightning strikes from damaging human health, further ensuring safety during the operation. After an accident warning light 317 sounds during the experiment, the operator can quickly step on the operating stand plate 304 to push out the telescopic end of the hydraulic cylinder 218, disconnecting the tested device from the impulse voltage generator 1, and at the same time, press the emergency stop switch 319 to disconnect all high-voltage circuits except for low-voltage circuits such as the oscilloscope 225, the operating panel 226, and the waveform display 227, further ensuring the safety of the equipment and the operator.

[0077] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An automated test device for a distribution network impulse test, comprising an impulse voltage generator (1), characterized in that: A self-connecting component (2) is installed on the back of the impulse voltage generator (1); The self-connecting assembly (2) includes an output box (201); An output box (201) is installed on the back of the impulse voltage generator (1), and a sliding frame (205) is provided on the back of the impulse voltage generator (1). Sliding grooves (206) are provided at the four inner corners of the sliding frame (205), and a stabilizing slide bar (207) is slidably installed on the inner side of the sliding groove (206). Transverse sliding grooves (208) are symmetrically provided at the top and bottom ends of the sliding frame (205), and a positioning slider (209) is slidably provided on the inner side of the transverse sliding groove (208). A moving block (210) is welded to the bottom end of the positioning slider (209), and a clamping slot plate (211) is welded to the side end face of the moving block (210), and a high-voltage wiring (213) is embedded in the inner side of the clamping slot plate (211); A driving screw rod (215) is rotatably mounted on the inner side of the sliding frame (205), a driving motor (216) is mounted on the side end surface of the sliding frame (205), a mounting slot plate (217) is mounted on the back side of the impulse voltage generator (1), a hydraulic cylinder (218) is mounted on the inner side of the mounting slot plate (217), and a telescopic end of the hydraulic cylinder (218) is connected to a reverse telescopic rod (219).

2. The automated test device for distribution network impact test according to claim 1, characterized in that: A high-pressure port (202) is installed on the inner side of the output box (201), a compensation port (203) is installed on the middle part of the inner side of the output box (201), a low-pressure port (204) is installed on the inner side of the output box (201), a limit block (228) is installed on the inner side of the sliding frame (205), a movable groove (229) is provided at a position corresponding to the driving screw rod (215) on the middle part of the side end surface of the limit block (228), and a low-voltage wiring (214) is threadedly connected at the inner top position of the limit block (228).

3. The automated test device for distribution network impact test according to claim 2, characterized in that: A clamping block (212) is welded to the positive end face of the moving block (210), one end of the high-voltage wiring (213) is connected to a connecting terminal (220), one end of the connecting terminal (220) is installed with a test device placement box (221), a side end face of the test device placement box (221) is installed with a vacuum pump (222), a placement chamber (223) is provided on the inner side of the test device placement box (221), and a sealing top cover (224) is clamped to the top end of the test device placement box (221).

4. The automated test device for distribution network impact test according to claim 3, characterized in that: An oscilloscope (225) is installed on the front end surface of the impulse voltage generator (1), an operation panel (226) is installed at the top position of the front surface of the impulse voltage generator (1), and a waveform display (227) is installed on the side end surface of the impulse voltage generator (1).

5. The automated test device for distribution network impact test according to claim 1, characterized in that: Two hydraulic cylinders (218) are installed, and the two hydraulic cylinders (218) are symmetrically installed on the back of the impulse voltage generator (1). The reverse telescopic rods (219) are both welded to the sliding frame (205).

6. The automated test device for distribution network impact test according to claim 4, characterized in that: One end of the driving screw rod (215) is connected to the transmission end of the driving motor (216), the input ends of the driving motor (216) and the hydraulic cylinder (218) are both electrically connected to the output end of the internal controller, the output end of the oscilloscope (225) is electrically connected to the input end of the waveform display (227), and the output end of the operation panel (226) is electrically connected to the input end of the internal controller.

7. The automated test device for distribution network impact test according to claim 6, characterized in that: A protection component (3) is installed at the bottom of the impulse voltage generator (1); The protection component (3) includes a fixing seat (301); The bottom end of the impulse voltage generator (1) is welded with a fixed seat (301), the inner side of the fixed seat (301) is provided with a rotation groove (318), the inner side of the rotation groove (318) is rotatably mounted with a rotation shaft (302), the outer side of the rotation shaft (302) is welded with a rotation plate (303), one end face of the rotation plate (303) is welded with an operating standing plate (304), and the four corners of the bottom end of the impulse voltage generator (1) are welded with supporting legs (305); The top of the operating standing plate (304) is bonded with an anti-skid rubber pad (306), and a pressure plate (307) is welded on the outer side of the rotating shaft (302) at a position symmetrical to the rotating plate (303), and a counterweight (308) is installed on the top of the pressure plate (307); A mounting groove cylinder (309) is welded at the bottom of the positive end surface of the impulse voltage generator (1), a sliding cylinder (310) is embedded in the inner side of the mounting groove cylinder (309), a compression chamber (311) is provided on the inner side of the sliding cylinder (310), an extrusion rod (312) is slidably installed on the inner side of the compression chamber (311), a sealing rubber pad (313) is bonded to the top end of the extrusion rod (312), and an air guide hole (313) is provided at the middle position of the top end of the sliding cylinder (310). 314), a proximity switch (315) is installed at the bottom of the impulse voltage generator (1), a power controller (316) is installed at the bottom position of the front of the impulse voltage generator (1), a warning light (317) is installed at the top of the impulse voltage generator (1), an emergency stop switch (319) is installed at the top of the front of the impulse voltage generator (1), and a power indicator light (320) is installed at the top of the emergency stop switch (319) on the front of the impulse voltage generator (1).

8. The automated test device for distribution network impact test according to claim 7, characterized in that: Two fixing seats (301) are welded, and the two fixing seats (301) are symmetrically welded to the bottom end of the impulse voltage generator (1). The inner diameter of the rotating groove (318) is equal to the outer diameter of the rotating shaft (302).

9. The automated test device for distribution network impact test according to claim 7, characterized in that: Two sliding cylinders (310) are installed, and the two sliding cylinders (310) are symmetrically installed on the front of the impulse voltage generator (1). The output ends of the warning light (317) and the power indicator light (320) are both electrically connected to the output end of the power controller (316), and the output ends of the proximity switch (315) and the emergency stop switch (319) are both electrically connected to the input end of the power controller (316).

10. The specific method for using the automated test device for distribution network impact test according to claim 7 is characterized in that: The steps include: S1. First, the operator steps on the operating stand plate (304) before adjusting the value. At this time, the operating stand plate (304) is away from the proximity switch (315), thereby stopping the proximity switch (315) from being triggered and disconnecting the main power supply from the internal discharge resistor. S2. Subsequently, the operator inserts the other ends of the high-voltage wiring (213) and the low-voltage wiring (214) into the inner side of the connection terminal (220), and then clamps the alligator clip connected to the connection terminal (220) to the electrical connection end of the device under test, and re-clamps the sealing top cover (224) to the top of the test device placement box (221); S3. Next, the impulse voltage and impulse number are set through the operation panel 226. Then, the movable block 210 is controlled to slide inside the sliding frame 205. After sliding a certain distance, one end of the high-voltage wire 213 is aligned with one of the high-voltage ports 202, thereby stopping the sliding of the movable block 210. S4. Then, after the value is adjusted, the operator walks from the top of the operating stand plate (304) to a safe position, and the operating stand plate (304) is reattached to the bottom of the impulse voltage generator (1), and the proximity switch (315) is triggered to charge the resistor, and the hydraulic cylinder (218) is controlled to retract to connect the circuit; S5. Finally, the impulse voltage generator (1) is used to simulate the occurrence of an impulse. At this time, the impulse result can be observed through the oscilloscope (225) and the waveform display (227), thereby completing the simulated impulse experiment of the distribution network component.

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