A test power supply device for high voltage shunt reactor

Abstract

The present invention discloses a test power supply device for a high-voltage shunt reactor, including an outer protective tube and a voltage-equalizing tube, an insulating sleeve is rotatably installed inside the outer protective tube, an electrical connection block is fixed on the inner wall of the insulating sleeve, a power supply cable is connected to the outer wall of the insulating sleeve, the power supply cable is electrically connected to the electrical connection block, the power supply cable passes through the arc opening of the outer protective tube wall, a conductive ring is relatively rotatably installed inside the insulating sleeve, the electrical connection blocks are respectively embedded in the ring grooves, the voltage-equalizing tube is arranged in the outer protective tube and the conductive ring is sleeved on the voltage-equalizing tube, both ends of the voltage-equalizing tube pass through the outer protective tube and are connected with an electrical connection sleeve, and both ends of the outer protective tube are provided with voltage-equalizing balls, the voltage-equalizing balls are sleeved on the electrical connection column of the reactor through the bottom opening, and both ends of the voltage-equalizing tube pass into the voltage-equalizing ball from the side opening of the voltage-equalizing ball and are sleeved on the electrical connection column of the reactor. The present invention can keep the electric field distribution uniform during the voltage transmission process.

Description

Technical Field

[0001] The invention relates to the field of reactor testing devices, in particular to a test power supply device for high-voltage shunt reactors. Background Art

[0002] Before being put into use, the reactors need to be connected in parallel in pairs to conduct loss, reactance, induced withstand voltage, partial discharge, sound level, vibration, temperature rise, and overcurrent tests under high-voltage environment. Specifically, the electrical connection column ends of the two reactors are connected in parallel, and then connected to the high-voltage power supply through the power supply cable. When testing high-voltage parallel reactors with voltage levels of 500kV and above, it is necessary to use a 900kV test transformer to supply power through the power supply cable. In the case of high voltage levels, if the power supply cable is directly used to connect the electrical connection column of the reactor, the irregular shape of the power supply cable will cause electric field distortion and thus produce corona phenomenon, which has the problem of poor safety. Summary of the invention

[0003] The object of the present invention is to provide a test power supply device for high-voltage shunt reactors, so as to solve the problem of poor safety when directly using power supply cables to connect reactors in parallel tests in the prior art.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A test power supply device for a high-voltage shunt reactor, characterized in that it comprises an outer protective tube and a voltage-equalizing tube, an insulating sleeve is coaxially rotatably installed in the middle position of the inner wall of the outer protective tube, an electrical connection block is fixed in the middle position of the inner wall of the insulating sleeve, a power supply cable is fixedly connected to the outer wall of the insulating sleeve, and the power supply cable is electrically connected to the electrical connection block, an arc-shaped opening is provided in the middle of the outer protective tube wall corresponding to the position of the power supply cable for the power supply cable to pass through, a conductive ring is coaxially relatively rotatably installed in the middle position of the inner wall of the insulating sleeve, a ring groove is provided in the middle position of the outer wall of the conductive ring, the electrical connection blocks on the inner wall of the insulating sleeve are respectively embedded in the ring groove and keep in contact with the groove wall of the ring groove, and the voltage-equalizing tube is coaxially arranged It is placed in the outer protective tube, and the conductive ring is coaxially sleeved on the equalizing tube and keeps contact with the equalizing tube. The two ends of the equalizing tube respectively pass through the corresponding tube openings of the outer protective tube, and the two ends of the equalizing tube are respectively connected with electrical connection sleeves, and the axial directions of the electrical connection sleeves are respectively perpendicular to the axial direction of the equalizing tube. It also includes equalizing balls arranged outside the two ends of the outer protective tube, and each equalizing ball has openings on the bottom surface and the side facing the corresponding end of the outer protective tube. The equalizing balls are respectively clamped on the outside of the column ends of the electrical connection columns of different reactors through the bottom surface openings, and the two ends of the equalizing tube respectively pass through the side openings of the equalizing ball in the corresponding directions, and then are sleeved on the lower part of the column end of the electrical connection column of the corresponding reactor through the electrical connection sleeve.

[0006] The test power supply device for high-voltage shunt reactor is characterized in that: the inner wall of the outer protective tube is respectively formed with limit rings at the axial ends of the insulating sleeve, and the limit rings clamp the insulating sleeve.

[0007] The test power supply device for a high-voltage shunt reactor is characterized in that: there are multiple electrical connection blocks in the middle position of the inner wall of the insulating sleeve, the multiple electrical connection blocks are evenly distributed in the circumferential direction, and the multiple electrical connection blocks are connected in parallel or in series with the power supply cables through conductive parts buried in the inner wall of the insulating sleeve.

[0008] The test power supply device for high-voltage shunt reactor is characterized in that a guide sleeve is fixed to the side opening of each voltage-equalizing ball, the axial direction of the guide sleeve is parallel to the axial direction of the outer protective tube, and the tube end of the outer protective tube is coaxially installed in the guide sleeve.

[0009] The test power supply device for high-voltage shunt reactor is characterized in that: the outer wall of the outer protective tube is provided with an annular edge near the tube end. When the tube end of the outer protective tube is coaxially installed in the guide sleeve, the annular edge abuts against the sleeve opening of the guide sleeve facing the outside of the pressure equalizing ball.

[0010] The test power supply device for high-voltage parallel reactor is characterized in that: an insulating upper sheath is fixed to the top of the inner wall of each voltage-equalizing ball, and the insulating upper sheath of the inner wall of each voltage-equalizing ball is simultaneously sleeved on the upper part of the column end of the corresponding reactor electrical connection column.

[0011] In the present invention, the power supply cable maintains a rotational electrical connection with the conductive ring through the electrical connection block of the insulating sleeve, the conductive ring maintains a relative rotational electrical connection with the voltage equalizing tube, and then is electrically connected to the electrical connection column of the reactor through the electrical connection sleeve at the end of the voltage equalizing tube. In the above manner, the voltage equalizing tube is used to make the electric field entering the reactor evenly distributed, and the routing direction of the power supply cable can be adjusted by rotating the insulating sleeve as needed.

[0012] In the present invention, a voltage-equalizing ball is arranged at the connection position of the voltage-equalizing tube and the electrical connection column of the reactor to make the electric field distribution at the connection uniform. The voltage-equalizing ball is guided to support the outer protective tube through the guide sleeve. At the same time, the insulating upper sleeve on the inner wall of the voltage-equalizing ball and the electrical connection sleeve at the end of the voltage-equalizing tube are both sleeved on the electrical connection column of the reactor, thereby forming a stable connection structure and further promoting the uniform distribution of the electric field at the connection.

[0013] Compared with the prior art, the present invention is used to connect a high-voltage power supply and various reactors during a high-voltage shunt reactor test, which can maintain uniform electric field distribution during the voltage transmission process, improve safety, and has the advantages of easy use and stable connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention.

[0015] Figure 2 It is a partial enlarged view of the insulating sleeve of the present invention.

[0016] Figure 3 It is a working state diagram of the present invention. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] like Figure 1 , Figure 2 , Figure 3 As shown, a test power supply device for a high-voltage shunt reactor comprises an outer protective tube 1 and a voltage-equalizing tube 2 which are horizontal in the axial direction. An insulating sleeve 3 is coaxially and rotatably installed in the middle position of the inner wall of the outer protective tube 1. The inner wall of the outer protective tube 1 is respectively formed with limit ring platforms 4 at the positions of the two axial ends of the insulating sleeve 3, and the limit ring platforms 4 clamp the limit insulating sleeve 3. A plurality of electrical connection blocks 5 are fixed at the middle position of the inner wall of the insulating sleeve 3, and the plurality of electrical connection blocks 5 are evenly distributed in the circumferential direction. A power supply cable 6 is fixedly connected to the outer wall of the insulating sleeve 3. The plurality of electrical connection blocks 5 are connected in parallel or in series with the power supply cable 6 through the conductive member buried in the inner wall of the insulating sleeve 3. An arc-shaped opening 7 is provided in the middle of the outer protective tube wall 1 corresponding to the position of the power supply cable 6 for the power supply cable 6 to pass through. A conductive ring 8 is coaxially and relatively rotatably installed in the middle position of the inner wall of the insulating sleeve 3. A ring groove is provided in the middle position of the outer wall of the conductive ring 8. Each electrical connection block 5 on the inner wall of the insulating sleeve 3 is respectively embedded in the ring groove 3 and keeps contact with the groove wall of the ring groove 3.

[0019] The pressure-equalizing tube 2 is coaxially arranged in the outer protective tube 1, and the pressure-equalizing tube 2 passes coaxially through the conductive ring 8, and the conductive ring 8 is coaxially sleeved on the pressure-equalizing tube 2 and keeps contact with the pressure-equalizing tube 2. The two ends of the pressure-equalizing tube 2 respectively pass through the corresponding pipe openings of the outer protective tube 1, and the two ends of the pressure-equalizing tube 2 are respectively connected with axially vertical electrical connecting sleeves 9.

[0020] It also includes pressure-equalizing balls 10 arranged outside the two ends of the outer protective tube 1. Each pressure-equalizing ball 10 has an opening on the bottom surface and the side facing the corresponding end of the outer protective tube, and the openings on the bottom surface and the side form a continuous opening 11. Each side opening of the pressure-equalizing ball 10 is fixed with a guide sleeve 12 axially horizontally along the left and right sides. The tube end of the outer protective tube 1 is coaxially installed in the guide sleeve 12, and the guide sleeve 12 plays a guiding and supporting role. The outer wall of the outer protective tube 1 is provided with a ring edge 13 near the tube end. When the tube end of the outer protective tube 1 is coaxially installed in the guide sleeve 12, the ring edge 13 abuts against the sleeve opening of the guide sleeve 12 facing the outside of the pressure-equalizing ball 10. An insulating upper sleeve 14 is fixed to the top of the inner wall of each pressure-equalizing ball 10.

[0021] The voltage-equalizing balls 10 are respectively inserted into the ends of the electrical connection columns 16 of different reactors 15 through the bottom openings, and the two ends of the voltage-equalizing tube 2 are respectively inserted into the voltage-equalizing balls 10 from the side openings of the voltage-equalizing balls 10 in the corresponding directions, and then are put on the lower part of the end of the electrical connection column 16 of the corresponding reactor 15 through the electrical connection sleeve 9. At the same time, the insulating upper sheath 14 on the inner wall of each voltage-equalizing ball 10 is also put on the upper part of the end of the electrical connection column 16 of the corresponding reactor 15.

[0022] During actual assembly, firstly, the two ends of the outer protective tube 1 are respectively inserted into the guide sleeves 12 of the equalizing ball 10 in the corresponding directions, and the ring edge 13 is pressed against the guide sleeve 12 to form a positioning, and then the whole is hoisted above the two reactors 15, and then the electrical connection column 16 of the reactor 15 is aligned with the bottom opening of the equalizing ball 10, and then the outer protective tube 1 and the equalizing ball 10 are moved downward as a whole, so that the electrical connection sleeve 9 and the insulating upper sleeve 14 are simultaneously clamped on the electrical connection column 16 to complete the assembly.

[0023] The embodiments described in the present invention are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by engineers and technicians in this field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have all been recorded in the claims.

Claims

1. A test power supply device for a high-voltage shunt reactor, characterized in that: It includes an outer protective tube and a voltage-equalizing tube. An insulating sleeve is coaxially rotatably installed in the middle position of the inner part of the outer protective tube. An electrical connection block is fixed in the middle position of the inner wall of the insulating sleeve. A power supply cable is fixedly connected to the outer wall of the insulating sleeve. The power supply cable is electrically connected to the electrical connection block. An arc-shaped opening is provided in the middle of the outer protective tube wall corresponding to the position of the power supply cable for the power supply cable to pass through. A conductive ring is coaxially relatively rotatably installed in the middle position of the inner part of the insulating sleeve. An annular groove is provided in the middle position of the outer wall of the conductive ring. The electrical connection blocks on the inner wall of the insulating sleeve are respectively embedded in the annular groove and keep in contact with the groove wall of the annular groove. The voltage-equalizing tube is coaxially arranged in the outer protective tube, and the conductive ring is coaxially arranged in the outer protective tube. It is sleeved on the pressure-equalizing tube and keeps in contact with the pressure-equalizing tube, and the two ends of the pressure-equalizing tube are respectively passed through the corresponding tube openings of the outer protective tube, and the two ends of the pressure-equalizing tube are respectively connected with electrical connection sleeves, and the axial directions of the electrical connection sleeves are respectively perpendicular to the axial direction of the pressure-equalizing tube, and also includes pressure-equalizing balls arranged outside the two ends of the outer protective tube, and each pressure-equalizing ball has openings on the bottom surface and the side facing the corresponding end of the outer protective tube, and the pressure-equalizing balls are respectively sleeved on the outside of the column ends of the electrical connection columns of different reactors through the bottom surface openings, and the two ends of the pressure-equalizing tube are respectively inserted into the pressure-equalizing balls from the side openings of the pressure-equalizing balls in the corresponding directions, and then sleeved on the lower part of the column end of the electrical connection column of the corresponding reactor through the electrical connection sleeve; The inner wall of the outer protective tube is respectively formed with limit rings at the two axial ends of the insulating sleeve, and the limit rings clamp the insulating sleeve. There are multiple electrical connection blocks in the middle of the inner wall of the insulating sleeve, the multiple electrical connection blocks are evenly distributed in the circumferential direction, and the multiple electrical connection blocks are connected in parallel or in series with the power supply cable through the conductive member buried in the inner wall of the insulating sleeve.

2. A test power supply device for a high-voltage shunt reactor according to claim 1, characterized in that: A guide sleeve is fixed to the side opening of each pressure equalizing ball. The axial direction of the guide sleeve is parallel to the axial direction of the outer protective tube. The tube end of the outer protective tube is coaxially installed in the guide sleeve.

3. A test power supply device for a high-voltage shunt reactor according to claim 2, characterized in that: The outer wall of the outer protective tube is provided with annular edges near the tube end. When the tube end of the outer protective tube is coaxially installed in the guide sleeve, the annular edges abut against the sleeve opening of the guide sleeve facing the outside of the pressure equalizing ball.

4. A test power supply device for a high-voltage shunt reactor according to claim 1, characterized in that: An insulating upper sheath is fixed on the top of the inner wall of each voltage grading ball, and the insulating upper sheath of the inner wall of each voltage grading ball is simultaneously sleeved on the upper part of the column end of the corresponding reactor electrical connection column.

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