A reconstruction and expansion equipment testing device for a smart substation

Abstract

This invention discloses a testing device for the renovation and expansion equipment of intelligent substations, comprising an environmental simulation laboratory body. The device is characterized in that: substation renovation and expansion equipment and vertical poles are fixedly installed on the bottom of the inner wall of the environmental simulation laboratory body; a cable and a rope are installed between two vertical poles, with the rope located below the cable; a test box is provided on the upper end face of the cable; a hemispherical shell is fixedly installed on the bottom of the test box; a probe is installed inside the hemispherical shell; and a ball bearing is movably installed on the bottom of the probe. This testing device for the renovation and expansion equipment of intelligent substations, through the rope, probe, and ball bearing, allows the cable to move along the rope after the take-up reel is rotated, as the rope changes direction via a fixed pulley. Because the expansion coefficients of the rope and cable are the same, the distance between them will not differ excessively due to temperature changes, thus avoiding large swaying during measurement.

Description

Technical Field

[0001] This invention relates to the field of power system technology, and in particular to a testing device for the renovation and expansion of intelligent substations. Background Technology

[0002] Intelligent substations are primarily built in remote, uninhabited desert areas with large diurnal temperature variations and severe dust storms. When upgrading or expanding substations, it's crucial to test the equipment to determine its suitability for the environment. Because the copper wires and insulation of the cables used in substations have different coefficients of thermal expansion, significant temperature changes can cause cracks in the cable insulation due to rapid expansion and contraction. Dust blown by the wind can further enlarge these cracks, increasing the contact area between the insulation and the external environment. This leads to faster aging of the insulation at the cracks, creating a positive feedback loop that widens the cracks until the insulation loses its insulating properties, posing a risk of electrical leakage and endangering personal safety. Therefore, it's necessary to test the changes in the cable insulation over time under these conditions to address the issue before equipment performance deteriorates to a critical level. Currently, environmental simulation tests are mainly used to test equipment performance. Environmental simulation testing equipment simulates various environmental conditions, including climate, transportation, handling, and vibration, and is a method used by companies or institutions to verify the quality of raw materials, semi-finished products, and finished products. The purpose is to verify whether materials and products meet the expected quality objectives in research and development, design, and manufacturing by using various environmental testing equipment.

[0003] To address this, we propose a testing device for the renovation and expansion of smart substation equipment. First, during the testing process, it is necessary to minimize the contact area with the cable. Scraping off residual sand or damaging the insulation layer during measurement will lead to errors in subsequent insulation layer measurements, affecting the accuracy of the test results. Second, when the damage to the cable insulation layer is minor, the shallow damage makes it difficult to measure. Furthermore, when testing the equipment in the renovated and expanded substation, the equipment needs to be continuously powered on to test its operational stability. However, there will be electromagnetic interference around the powered cable, which will introduce measurement errors if electronic equipment is used to measure the cable. Summary of the Invention

[0004] The main objective of this invention is to provide a testing device for the renovation and expansion of intelligent substations, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A testing device for the renovation and expansion equipment of a smart substation includes an environmental simulation laboratory body. The bottom of the inner wall of the environmental simulation laboratory body is fixedly installed with substation renovation and expansion equipment and vertical poles. A cable and rope are installed between two of the vertical poles, with the rope located below the cable. A test box is provided on the upper end face of the cable. A hemispherical shell is fixedly installed on the bottom of the test box. A probe is provided inside the hemispherical shell, and a ball bearing is movably installed on the bottom of the probe. The substation renovation and expansion equipment is electrically connected to the cable. The rope is made of the same material as the cable to ensure that their coefficients of thermal expansion are the same.

[0006] A further improvement of the present invention is that a rotating shaft is fixedly connected to the inner wall of the test box, and a lever is rotatably connected to the outer side of the rotating shaft. The bottom of one end of the lever is fixedly connected to the top of the probe. A spring is provided above the probe. One end of the spring is fixedly connected to the top of the lever, and the other end of the spring is fixedly connected to the top of the inner wall of the test box. A pen is fixedly installed on the back of the other end of the lever. A second roll of paper is provided inside the test box. The upper and lower ends of the second roll of paper are fixedly connected to the top and bottom of the inner wall of the test box, respectively. The second roll of paper is located on the back of the lever, and recording paper is provided on the outer side of the second roll of paper.

[0007] A further improvement of the present invention is that an L-shaped plate is fixedly connected to the side of the test box, a bearing is fixedly installed inside the L-shaped plate, a rotating rod is fixedly installed at the axis of the bearing, a first paper roll is fixedly connected to the top of the rotating rod, a plurality of protrusions are provided on the outer side of the bottom of the rotating rod, and the bottom of the rotating rod contacts the outer side of the rope.

[0008] A further improvement of the present invention is that a paper outlet is provided on the side of the test box, one side of the recording paper passes through the paper outlet and is fixedly connected to the outside of the first paper roll, and the pen is in contact with the front of the recording paper.

[0009] A further improvement of the present invention is that a slider is slidably installed on the outer side of the rope, a telescopic rod is fixedly connected to the upper surface of the slider, and the top of the telescopic rod is fixedly connected to the side of the test box.

[0010] A further improvement of the present invention is that a take-up reel is fixedly installed on the front of each of the two vertical rods, a fixed pulley is fixedly installed on the opposite side of each of the two vertical rods, and a pull rope is provided on the outer side of each of the two take-up reels. One end of each pull rope passes over the fixed pulley above and is fixedly connected to both sides of the slider respectively.

[0011] A further improvement of the present invention is that a touch control screen is fixedly installed on the front of the environmental simulation laboratory body. The touch control screen is used to display the test status of the substation renovation and expansion equipment in real time. A blower, a temperature regulator and a sand storage box are fixedly installed on the side of the environmental simulation laboratory body. The sand storage box is located above the blower to facilitate blowing sand out when blowing air.

[0012] A further improvement of this invention is a testing device for the renovation and expansion of intelligent substations, the usage steps of which are as follows: A: Install the substation renovation and expansion equipment inside the environmental simulation laboratory. Set the cables on two vertical poles. Start the blower and temperature controller to simulate a desert environment with severe sandstorms and large temperature differences inside the environmental simulation laboratory. Start the substation renovation and expansion equipment and observe whether it works stably in this environment through the touch control screen. B: After completing step A, the tester rotates the take-up reel every so often. The pull rope changes direction after passing through the fixed pulley and pulls the slider to move along the rope. When the slider moves, the test box moves along with it through the telescopic rod. The probe extends out of the hemispherical shell to measure the cable. The ball at the bottom of the probe rolls along the cable during the measurement. Because the part of the rotating rod that contacts the cable has protrusions to increase the friction, the rotating rod rotates inside the bearing during the movement of the slider. C: During step B, when the cable insulation is damaged, the probe contacts the damaged area. The spring pushes the lever to move the probe downward. Using the lever principle, the pen at the other end of the lever draws a waveform on the recording paper. As the measurement continues, the rotating rod rotates, driving the first roll of paper to rotate and roll up the used recording paper. D: After completing step C, remove the recording paper from the first roll of paper. The waveform drawn on the recording paper can reflect the degree of damage to the cable insulation layer. When conducting the next test, pull the slider to the other end by rotating another take-up reel and perform the test according to the above steps.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. Using a rope, probe, and ball bearings, the take-up reel rotates, and the pull rope changes direction via a fixed pulley, pulling the slider along the rope. Since the expansion coefficients of the rope and cable are the same, the distance between them will not be too large due to temperature changes, avoiding large swaying during measurement. As the slider moves, the test box moves along with it via a telescopic rod. The probe extends out of the hemispherical shell to measure the cable. The bottom of the hemispherical shell is arc-shaped, which reduces the contact area with the cable. The ball bearings at the bottom of the probe roll along the cable during the measurement process. The rolling of the ball bearings during the measurement process can prevent the probe from scratching the cable, reducing the impact of the testing device on the cable and improving the accuracy of the test results. 2. Using a rotating shaft, lever, spring, and recording paper, when the cable insulation is damaged, the probe contacts the damaged area. The spring pushes the lever to move the probe downwards. Utilizing the lever principle, since the power arm is much smaller than the resistance arm, after the probe at the bottom of the power arm detects the crack in the cable, the power arm moves a small distance, and the pen on the back of the resistance arm moves a large distance, drawing a waveform on the recording paper. The waveform drawn on the recording paper reflects the degree of damage to the cable insulation. This measuring device can measure minor damage and, since it does not use electronic equipment, it can ignore electromagnetic interference, reducing measurement errors. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a testing device for the renovation and expansion of intelligent substations according to the present invention.

[0015] Figure 2 This is a schematic diagram of the internal structure of the environmental simulation laboratory body of a testing device for the renovation and expansion of intelligent substations according to the present invention.

[0016] Figure 3 This invention relates to a testing device for the renovation and expansion of intelligent substations. Figure 2 An enlarged diagram of A in the diagram.

[0017] Figure 4 This is a cross-sectional schematic diagram of the test box and hemispherical shell of a testing device for the renovation and expansion of intelligent substations according to the present invention.

[0018] Figure 5 This is a top view schematic diagram of the internal structure of the test box of a testing device for the renovation and expansion of intelligent substations according to the present invention.

[0019] Figure 6 This is a schematic cross-sectional view of an L-shaped plate for testing equipment used in the renovation and expansion of intelligent substations, according to the present invention.

[0020] Figure 7 This is a partial structural connection diagram of a testing device for the renovation and expansion of intelligent substations according to the present invention.

[0021] In the diagram: 1. Environmental simulation laboratory main body; 2. Hair dryer; 3. Temperature controller; 4. Sand storage tank; 5. Touch control screen; 6. Substation renovation and expansion equipment; 7. Vertical rod; 8. Cable; 9. Rope; 10. Slider; 11. Fixed pulley; 12. Take-up reel; 13. Pull rope; 14. Telescopic rod; 15. Test box; 16. Hemispherical shell; 17. L-shaped plate; 18. Rotating rod; 19. First roll of paper; 20. Recording paper; 21. Second roll of paper; 22. Shaft; 23. Lever; 24. Spring; 25. Probe; 26. Ball bearing; 27. Paper outlet; 28. Pen; 29. ​​Bearing; 30. Protrusion. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. In order to better illustrate the specific embodiments of the present invention, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1 like Figure 1-7 As shown, a testing device for the renovation and expansion equipment of a smart substation includes an environmental simulation laboratory body (1). The bottom of the inner wall of the environmental simulation laboratory body (1) is fixedly installed with a substation renovation and expansion equipment (6) and a vertical rod (7). A cable (8) and a rope (9) are installed between the two vertical rods (7), and the rope (9) is located below the cable (8). A test box (15) is provided on the upper end face of the cable (8). A hemispherical shell (16) is fixedly installed on the bottom of the test box (15). A probe (25) is provided inside the hemispherical shell (16). A ball bearing (26) is movably installed on the bottom of the probe (25). The substation renovation and expansion equipment (6) is electrically connected to the cable (8). The material used for the rope (9) is the same as that used for the cable (8) to ensure that the coefficient of thermal expansion of the two is the same. This ensures that the distance between the cable (8) and the rope (9) will not be too large due to thermal expansion and contraction when the temperature changes, thus avoiding large shaking during measurement and causing larger measurement errors.

[0024] A rotating shaft (22) is fixedly connected to the inner wall of the test box (15). A lever (23) is rotatably connected to the outer side of the rotating shaft (22). The bottom of one end of the lever (23) is fixedly connected to the top of the probe (25). A spring (24) is provided above the probe (25). One end of the spring (24) is fixedly connected to the top of the lever (23). The other end of the spring (24) is fixedly connected to the top of the inner wall of the test box (15). A pen (28) is fixedly installed on the back of the other end of the lever (23). A second roll of paper (21) is provided inside the test box (15). The upper and lower ends of the second roll of paper (21) are fixedly connected to the top and bottom of the inner wall of the test box (15) respectively. The second roll of paper (21) is located on the back of the lever (23). Recording paper (20) is provided on the outer side of the second roll of paper (21). The spring (24) pushes the lever (23) downward so that the probe (25) is always in contact with the cable (8).

[0025] An L-shaped plate (17) is fixedly connected to the side of the test box (15). A bearing (29) is fixedly installed inside the L-shaped plate (17). A rotating rod (18) is fixedly installed at the center of the bearing (29). A first roll of paper (19) is fixedly connected to the top of the rotating rod (18). Several protrusions (30) are provided on the outer side of the bottom of the rotating rod (18). The bottom of the rotating rod (18) contacts the outer side of the rope (9).

[0026] The test box (15) has a paper outlet (27) on its side. One side of the recording paper (20) passes through the paper outlet (27) and is fixedly connected to the outside of the first paper roll (19). The pen (28) is in contact with the front of the recording paper (20).

[0027] A slider (10) is slidably installed on the outside of the rope (9). A telescopic rod (14) is fixedly connected to the upper surface of the slider (10). The top of the telescopic rod (14) is fixedly connected to the side of the test box (15). Since the test box (15) itself has a certain weight, it presses the telescopic rod (14) down. As the temperature changes, the distance between the rope (9) and the cable (8) changes, and the length of the telescopic rod (14) changes accordingly, so that the probe (25) is always in contact with the cable (8).

[0028] Both vertical rods (7) are fixedly equipped with take-up reels (12) on their front sides, and fixed pulleys (11) are fixedly installed on opposite sides of both vertical rods (7). Pull ropes (13) are provided on the outer sides of both take-up reels (12). One end of each pull rope (13) passes over the fixed pulley (11) above and is fixedly connected to both sides of the slider (10).

[0029] The front of the environmental simulation laboratory body (1) is fixedly equipped with a touch control screen (5). The touch control screen (5) is used to display the test status of the substation renovation and expansion equipment (6) in real time. The side of the environmental simulation laboratory body (1) is fixedly equipped with a blower (2), a temperature regulator (3) and a sand storage box (4). The sand storage box (4) is located above the blower (2) to facilitate blowing sand out when blowing air. The blower (2), temperature regulator (3) and sand storage box (4) together simulate the desert environment and regularly clean out the sand accumulated in the environmental simulation laboratory body (1).

[0030] By adopting the above technical solution: by setting the rope (9), probe (25) and ball (26), rotating the take-up reel (12), the pull rope (13) changes direction through the fixed pulley (11) and pulls the slider (10) to move along the rope (9). Since the expansion coefficient of the rope (9) and the cable (8) are the same, the gap between the two will not be too large due to temperature changes, thus avoiding large shaking during measurement. When the slider (10) moves, the test box (15) moves with it through the telescopic rod (14). The probe (25) extends out of the hemispherical shell (16) to measure the cable (8). The bottom of the hemispherical shell (16) is arc-shaped, which can reduce the contact area with the cable (8). The ball (26) at the bottom of the probe (25) rolls along the cable (8) during the measurement. The rolling of the ball (26) during the measurement can prevent the probe (25) from scratching the cable (8), reduce the impact of the test device on the cable (8), and improve the accuracy of the test results.

[0031] Example 2 like Figure 1-7 As shown, a testing device for the renovation and expansion equipment of a smart substation includes an environmental simulation laboratory body (1). The bottom of the inner wall of the environmental simulation laboratory body (1) is fixedly installed with a substation renovation and expansion equipment (6) and a vertical rod (7). A cable (8) and a rope (9) are installed between the two vertical rods (7), and the rope (9) is located below the cable (8). A test box (15) is provided on the upper end face of the cable (8). A hemispherical shell (16) is fixedly installed on the bottom of the test box (15). A probe (25) is provided inside the hemispherical shell (16). A ball bearing (26) is movably installed on the bottom of the probe (25). The substation renovation and expansion equipment (6) is electrically connected to the cable (8). The material used for the rope (9) is the same as that used for the cable (8) to ensure that the coefficients of thermal expansion of the two are the same.

[0032] A rotating shaft (22) is fixedly connected to the inner wall of the test box (15). A lever (23) is rotatably connected to the outer side of the rotating shaft (22). The bottom of one end of the lever (23) is fixedly connected to the top of the probe (25). A spring (24) is provided above the probe (25). One end of the spring (24) is fixedly connected to the top of the lever (23). The other end of the spring (24) is fixedly connected to the top of the inner wall of the test box (15). A paintbrush (28) is fixedly installed on the back of the other end of the lever (23). The interior of the test box (15) is set with... There is a second paper roll (21). The upper and lower ends of the second paper roll (21) are fixedly connected to the top and bottom of the inner wall of the test box (15), respectively. The second paper roll (21) is located on the back of the lever (23). Recording paper (20) is set on the outside of the second paper roll (21). The section connected to the probe (25) is the power arm, and the section connected to the pen (28) is the resistance arm. When the lever (23) is subjected to force, it rotates around the pivot (22). The length of the power arm of the lever (23) is much smaller than the length of the resistance arm, which makes it easy to measure small changes.

[0033] By adopting the above technical solution: through the set rotating shaft (22), lever (23), spring (24) and recording paper (20), when the insulation layer of the cable (8) is damaged, the probe (25) contacts the damaged part, and the spring (24) pushes the lever (23) to move the probe (25) downward. Utilizing the lever principle, since the power arm is much smaller than the resistance arm, after the probe (25) at the bottom of the power arm detects the crack on the cable (8), the power arm moves a small distance, and the pen (28) on the back of the resistance arm moves a large distance. The pen (28) draws a waveform on the recording paper (20). The waveform drawn on the recording paper (20) can reflect the degree of damage to the insulation layer of the cable (8). This measuring device can measure small damages, and since no electronic equipment is used, electromagnetic interference can be ignored, reducing measurement errors.

[0034] It should be noted that this invention is a testing device for the renovation and expansion equipment of a smart substation. In use, firstly, the substation renovation and expansion equipment (6) is installed inside the environmental simulation laboratory body (1), and the cable (8) is set on two vertical rods (7). The blower (2) and the temperature regulator (3) are started to simulate a desert environment with severe sandstorms and large temperature differences inside the environmental simulation laboratory body (1). The substation renovation and expansion equipment (6) is started, and its operation under this environment is observed through the touch control screen (5). Secondly, the tester rotates the take-up reel (12) every once in a while. The pull rope (13) changes direction through the fixed pulley (11) and pulls the slider (10) to move along the rope (9). When the slider (10) moves, the test box (15) moves along the telescopic rod (14). The probe (25) extends out of the hemispherical shell (16) to measure the cable (8). The ball (26) at the bottom of the probe (25) moves along the cable (8) during the measurement process. Rolling, because the part of the rotating rod (18) that contacts the cable (8) has a protrusion (30) which increases the friction, the rotating rod (18) rotates inside the bearing (29) during the movement of the slider (10). Furthermore, when the insulation layer of the cable (8) is damaged, the probe (25) contacts the damaged part, and the spring (24) pushes the lever (23) to move the probe (25) downward. Using the lever principle, the pen (28) at the other end of the lever (23) draws a waveform on the recording paper (20). As the measurement continues, the rotating rod (18) rotates and drives the first roll of paper (19) to rotate, and rolls up the used recording paper (20). Finally, the recording paper (20) is removed from the first roll of paper (19). The waveform drawn on the recording paper (20) can reflect the degree of damage to the insulation layer of the cable (8). When conducting the next test, the slider (10) is pulled to the other end by rotating another take-up reel (12), and the test is carried out according to the above steps.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A testing device for the renovation and expansion of intelligent substation equipment, comprising an environmental simulation laboratory body, characterized in that: The bottom of the inner wall of the environmental simulation laboratory is fixedly installed with substation renovation and expansion equipment and vertical poles. Cables and ropes are installed between two vertical poles, with the ropes located below the cables. A test box is provided on the upper end of the cable. A hemispherical shell is fixedly installed on the bottom of the test box. A probe is provided inside the hemispherical shell. A ball bearing is movably installed on the bottom of the probe. The substation renovation and expansion equipment is electrically connected to the cable. The rope is made of the same material as the cable to ensure that the coefficients of thermal expansion of the two are the same. A rotating shaft is fixedly connected to the inner wall of the test box, and a lever is rotatably connected to the outer side of the rotating shaft. The bottom of one end of the lever is fixedly connected to the top of the probe. A spring is provided above the probe. One end of the spring is fixedly connected to the top of the lever, and the other end of the spring is fixedly connected to the top of the inner wall of the test box. A pen is fixedly installed on the back of the other end of the lever. A second roll of paper is provided inside the test box. The upper and lower ends of the second roll of paper are fixedly connected to the top and bottom of the inner wall of the test box, respectively. The second roll of paper is located on the back of the lever, and recording paper is provided on the outer side of the second roll of paper.

2. The testing device for the renovation and expansion equipment of a smart substation according to claim 1, characterized in that: An L-shaped plate is fixedly connected to the side of the test box. A bearing is fixedly installed inside the L-shaped plate. A rotating rod is fixedly installed at the axis of the bearing. A first paper roll is fixedly connected to the top of the rotating rod. Several protrusions are provided on the outer side of the bottom of the rotating rod. The bottom of the rotating rod is in contact with the outer side of the rope.

3. The testing device for the renovation and expansion equipment of a smart substation according to claim 2, characterized in that: The test box has a paper outlet on its side. One side of the recording paper passes through the paper outlet and is fixedly connected to the outside of the first paper roll. The pen is in contact with the front of the recording paper.

4. The testing device for the renovation and expansion equipment of a smart substation according to claim 1, characterized in that: A slider is slidably mounted on the outside of the rope, and a telescopic rod is fixedly connected to the upper surface of the slider. The top of the telescopic rod is fixedly connected to the side of the test box.

5. A testing device for the renovation and expansion equipment of a smart substation according to claim 4, characterized in that: Both vertical rods are fixedly equipped with a take-up reel on their front sides, and fixed pulleys are fixedly installed on opposite sides of both vertical rods. Pull ropes are provided on the outer sides of both take-up reels, and one end of each pull rope passes over the fixed pulley above and is fixedly connected to both sides of the slider respectively.

6. The testing device for the renovation and expansion equipment of a smart substation according to claim 1, characterized in that: A touch control screen is fixedly installed on the front of the environmental simulation laboratory body. The touch control screen is used to display the test status of the substation renovation and expansion equipment in real time. A blower, a temperature regulator and a sand storage box are fixedly installed on the side of the environmental simulation laboratory body. The sand storage box is located above the blower to facilitate blowing sand out when blowing air.

7. A testing device for the renovation and expansion equipment of a smart substation according to any one of claims 1-6, characterized in that: The usage steps are as follows: A: Install the substation renovation and expansion equipment inside the environmental simulation laboratory. Set the cables on two vertical poles. Start the blower and temperature controller to simulate a desert environment with severe sandstorms and large temperature differences inside the environmental simulation laboratory. Start the substation renovation and expansion equipment and observe whether it works stably in this environment through the touch control screen. B: After completing step A, the tester rotates the take-up reel every so often. The pull rope changes direction after passing through the fixed pulley and pulls the slider to move along the rope. When the slider moves, the test box moves along with it through the telescopic rod. The probe extends out of the hemispherical shell to measure the cable. The ball at the bottom of the probe rolls along the cable during the measurement. Because the part of the rotating rod that contacts the cable has protrusions to increase the friction, the rotating rod rotates inside the bearing during the movement of the slider. C: During step B, when the cable insulation is damaged, the probe contacts the damaged area. The spring pushes the lever to move the probe downward. Using the lever principle, the pen at the other end of the lever draws a waveform on the recording paper. As the measurement continues, the rotating rod rotates, driving the first roll of paper to rotate and roll up the used recording paper. D: After completing step C, remove the recording paper from the first roll of paper. The waveform drawn on the recording paper can reflect the degree of damage to the cable insulation layer. When conducting the next test, pull the slider to the other end by rotating another take-up reel and perform the test according to the above steps.

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