On-load tap changer position detection device and identification system

Abstract

The present application provides a load tap changer gear position detection device and a discrimination system. The discrimination system includes a detection device and a processing device. The detection device includes: a main shaft, a sleeve, a center plate, a gear plate, a preselection plate, and a sliding plate. The gear plate, the preselection plate, and the sliding plate are all arranged on the outer periphery of the center plate, and the gear plate, the preselection plate, and the sliding plate are all on the same horizontal plane as the center plate. The processing device is connected to the detection device, and analyzes the current gear position of the load tap changer through the gear plate, and the processing device analyzes the gear position of the load tap changer through the preselection plate to change to upshift or downshift, and the processing device analyzes whether the load tap changer has slipped through the sliding plate. The present application analyzes the current gear position, preselection gear position, and sliding discrimination of the load tap changer through the load tap changer gear position detection device and discrimination system, thereby improving the reliability of the ultra-high voltage converter transformer OLTC, thereby improving the stable and reliable operation of the ultra-high voltage converter transformer.

Description

Technical Field

[0001] The present application belongs to the field of transformer equipment, and in particular, relates to an on-load tap changer gear position detection device and a discrimination system. Background Art

[0002] On-load tap changer (OLTC) is a voltage regulating device used to change the tapping connection position of transformer windings. OLTC is operated when the transformer is excited or loaded. The basic principle of OLTC is to switch between taps in transformer windings without interrupting the load current of the transformer, thereby changing the number of turns of the winding and ultimately achieving the purpose of voltage regulation.

[0003] However, the applicant has found that when OLTC is applied in a UHV converter transformer, the following problems exist.

[0004] 1. The UHV converter transformer operates at full load and high voltage for a long time, which makes the current flowing through OLTC larger.

[0005] 2. The load current flowing through the on-load tap changer of the UHV converter transformer is not a sine wave, but a current waveform with a commutation process, which makes the di / dt of the zero crossing point large and makes it difficult to extinguish the arc.

[0006] 3. The OLTC in the UHV converter transformer operates frequently, with the number of operations reaching 4,000 times per year, which places high requirements on the mechanical properties of the OLTC.

[0007] 4. There is no electrical quantity detection in the internal operation of OLTC. It is in a "black box" state during operation and cannot determine the transient working state during the switching process.

[0008] 5. The OLTCs currently used in my country's ultra-high voltage direct current transmission projects are all provided by foreign manufacturers, and accident analysis and improvements cannot be independently controlled.

[0009] Therefore, it is very important to correctly judge the gear position information of the UHV converter transformer OLTC for the stable operation of the UHV system. At present, the UHV converter transformer OLTC judges the gear position information of the on-load tap changer through the electric mechanism of the on-load tap changer, and then judges the gear position of the transformer.

[0010] The applicant has found that currently the gear position of the on-load tap changer is judged only by the number of revolutions of the drive motor of the electric mechanism of the on-load tap changer, which has the following shortcomings.

[0011] 1. The driving motor of the electric mechanism of the on-load tap changer is connected to the driving main shaft of the on-load tap changer mechanism through a multi-link mechanical transmission rod. When the electric mechanism determines the gear position of the electric mechanism and whether it is slipping by the number of turns of the driving motor, if any link of the multi-link mechanical transmission rod is abnormal, the driving motor will rotate but the on-load tap changer mechanism will not rotate, resulting in an error in the gear up position.

[0012] 2. The gear information of the electric mechanism is sent through the relay. In the UHV converter transformer, the transformer is adjusted frequently. For example, the DC converter transformer is adjusted more than 4,000 times a year. High-frequency operation can easily damage the relay, resulting in the relay being unable to send the gear information normally. Summary of the invention

[0013] According to one aspect of the present application, a device for detecting a gear position of an on-load tap changer is provided.

[0014] The on-load tap changer includes a rotating shaft, and the detection device includes: a main shaft, a sleeve, a center disk, and a gear disk. One end of the main shaft of the detection device is connected to the rotating shaft through the sleeve and rotates synchronously with the rotating shaft. The other end of the main shaft passes through the center of the center disk, is connected to the center disk, and rotates synchronously with the center disk. Gears are provided on the periphery of the gear disk and the center disk. The gear disk is provided on the periphery of the center disk and is located on the same horizontal plane as the center disk. It meshes with the center disk and rotates synchronously with the center disk. The gear disk includes a gear toothed disk, m groups of gear light emitters and m groups of gear light receivers. The gear toothed disk is provided with an optical path communication unit. The gear light receiver forms an optical code according to the light emitted by the gear light emitter through the optical path communication unit, where m is a positive integer and m≥2.

[0015] According to some embodiments of the present application, the gear plate further includes: the gear tooth plate is preset with sectors having the same number as the gear positions of the on-load tap changer. The optical path communication part further includes through holes and blocking parts, wherein the through holes and blocking parts of the optical path communication part are arranged in a different order on each sector to form an optical code that uniquely identifies the corresponding sector.

[0016] According to some embodiments of the present application, the detection device further includes: a pre-selection disk, the outer periphery of which is provided with a gear. The pre-selection disk is provided on the outer periphery of the center disk and is located on the same horizontal plane as the center disk, is spaced apart from the shift disk, meshes with the center disk, and rotates synchronously with the center disk.

[0017] The preselection disk also includes a preselection toothed disk and a preselection dial, the preselection dial is arranged above the preselection toothed disk and coaxially with the preselection toothed disk, and the preselection dial is provided with an arc-shaped groove, and the preselection dial is also provided with an extension portion extending beyond the periphery of the preselection toothed disk. The preselection toothed disk is also provided with a boss, and the boss is located in the arc-shaped groove of the preselection dial. The preselection disk also includes n groups of preselected light emitters and n groups of preselected light receivers, where n is a positive integer and n≥1. When the preselection toothed disk rotates, the preselection boss drives the preselection dial to rotate through the arc-shaped groove, so that the extension portion can block part of the light path in the n groups of preselected light emitters and the n groups of preselected light receivers.

[0018] According to some embodiments of the present application, the detection device also includes: a sliding plate, a gear is arranged on the outer periphery of the sliding plate, the sliding plate is arranged on the outer periphery of the center plate and is located on the same horizontal plane as the center plate, is spaced apart from the gear plate and the pre-selection plate, is meshed with the center plate, and rotates synchronously with the center plate.

[0019] The sliding plate also includes a sliding gear plate, k groups of sliding light emitters and k groups of sliding light receivers. The sliding gear plate is provided with an arc through hole. The sliding light emitters communicate with the sliding light receivers through the arc through hole, wherein k is a positive integer and k≥1.

[0020] According to another aspect of the present application, a system for determining the gear position of an on-load tap changer is provided. The system may include the on-load tap changer gear position detection device and processing device described above.

[0021] The processing device is connected to m groups of gear optical receivers, receives m groups of optical codes received by the m groups of gear optical receivers, forms gear optical code groups, and parses the gear of the on-load tap changer according to the optical code groups. Different gear optical code groups uniquely correspond to different gears of the on-load tap changer.

[0022] According to some embodiments of the present application, the processing device is also connected to n groups of pre-selected optical receivers, receives n groups of optical codes received by the n groups of pre-selected optical receivers, and forms a pre-selected optical code group, and parses the gear change of the on-load tap changer to upshift or downshift according to the pre-selected optical code group.

[0023] According to some embodiments of the present application, the processing device is further connected to k groups of sliding light receivers, receives optical codes from the k groups of sliding light receivers, and determines whether the on-load tap changer is sliding according to preset rules.

[0024] The present application provides a load tap changer gear position detection device and discrimination system, the detection device is provided with a main shaft, and the main shaft is connected to the rotating shaft connected to the load tap changer through a sleeve. The main shaft rotates synchronously with the rotating shaft, and causes the center disk to rotate synchronously with the main shaft. The outer peripheries of the center disk and the gear disk are respectively provided with gears, and the gears of the center disk are meshed with the gears of the gear disk, so that the gear disk and the center disk rotate synchronously. The gear disk is provided with a gear light emitter and a gear light receiver, and the gear disk is also provided with sectors with the same number as the gears of the load tap changer, and an optical path communication unit is provided on the sector. The light emitted by the gear light emitter is received by the gear light receiver through the optical path communication unit to form an optical code. The m groups of gear light receivers receive m optical codes to form a gear optical code group, and each gear optical code group corresponds to a unique gear of the load tap changer. According to the gear optical code group, the current gear information of the load tap changer is parsed.

[0025] The gear information is collected by the detection device provided by the present application to analyze the gear position of the on-load tap changer, thereby avoiding the situation in the prior art where multiple gear adjustments of the transformer lead to failure of the relay node and thus cause gear information upload errors, thereby improving the reliability of the on-load tap changer in the UHV converter transformer, thereby ensuring the stable operation of the UHV converter transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic structural diagram of an on-load tap changer position detection device according to an exemplary embodiment is shown;

[0028] Figure 2 A schematic diagram showing the structure of a gear plate of an on-load tap changer gear position detection device according to an example embodiment;

[0029] Figure 3 A schematic structural diagram showing a pre-selection plate of an on-load tap changer position detection device according to an exemplary embodiment;

[0030] Figure 4 A schematic structural diagram of a sliding gear plate of an on-load tap changer gear position detection device according to an exemplary embodiment is shown;

[0031] Figure 5 A schematic structural diagram of an on-load tap changer gear position determination system according to an exemplary embodiment is shown;

[0032] Figure 6A gear position correspondence table of an on-load tap changer according to an exemplary embodiment is shown.

[0033] Description of Figure Numbers:

[0034] On-load tap changer 1; gear detection device 2; processing device 3; rotating shaft 11; bushing 21; main shaft 22; center disk 23; gear disk 24; preselection disk 25; sliding disk 26; center gear 230; gear gear 240; gear toothed disk 241; gear light emitter 242; gear light receiver 243; sector 2411; optical path communication part 2412; through hole 24121; blocking part 24122; preselection gear 250; preselection toothed disk 251; boss 252; preselection dial 253; preselection light emitter 254; preselection light receiver 255; arc groove 2531; extension part 2532; sliding gear 260; sliding toothed disk 261; sliding light emitter 262; sliding light receiver 263; arc through hole 264. DETAILED DESCRIPTION

[0035] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0036] The described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of these specific details, or other modes, components, materials, devices or the like may be adopted. In these cases, known structures, methods, devices, implementations, materials or operations will not be shown or described in detail.

[0037] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0038] The terms "first", "second", etc. in the specification and claims of this application and the above drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions.

[0039] According to one aspect of the present application, a device for detecting the gear position of an on-load tap changer is provided. Figure 1-Figure 4 The detection device is described below.

[0040] Figure 1 FIG. 2 is a schematic diagram showing a structure of an on-load tap changer position detection device according to an exemplary embodiment. Figure 1 The on-load tap changer 1 comprises a rotating shaft 11 . The on-load tap changer gear position detection device 2 comprises: a shaft sleeve 21 , a main shaft 22 , a center plate 23 , and a gear position plate 24 .

[0041] One end of the main shaft 22 is connected to the rotating shaft 11 through the shaft sleeve 21, and rotates synchronously with the rotating shaft 11. The other end of the main shaft 22 passes through the center of the center disk 23, is connected to the center disk 23, and can rotate synchronously with the center disk 23. A gear gear 240 is provided on the periphery of the shift plate 24, and a center gear 230 is provided on the periphery of the center disk 23. The shift plate 24 is provided on the periphery of the center disk 23 and is located on the same horizontal plane as the center disk 23. The gear gear 240 and the center gear 230 are meshed, so that the shift plate 24 and the center disk 23 rotate synchronously.

[0042] Figure 2 FIG. 2 is a schematic diagram showing the structure of a gear plate of an on-load tap changer gear position detection device according to an exemplary embodiment. Figure 2 The gear plate 24 also includes a gear tooth plate 241, m groups of gear light emitters 242, and m groups of gear light receivers 243.

[0043] See also Figure 2 The gear toothed disc 241 is also provided with an optical path communication unit 2412, and the gear light receiver 243 forms an optical code according to the light emitted by the gear light emitter 242 passing through the optical path communication unit 2412, wherein m is a positive integer and m≥2.

[0044] When the gear position of the on-load tap changer 1 changes, the rotating shaft 11 rotates along with the on-load tap changer 1, so that the main shaft 22 rotates together with the on-load tap changer 1. The center plate 23 rotates together with the main shaft 22 and drives the gear plate 24 to rotate in the same direction.

[0045] When the on-load tap changer 1 changes gear by one gear, the on-load tap changer 1 drives the gear plate 24 to rotate one circle. The optical code of the optical path communication unit changes, and the gear light receiver 243 obtains the current gear information of the on-load tap changer gear 1.

[0046] Optionally, the gear toothed disc 241 is further provided with sectors 2411 having the same number as the gears of the on-load tap changer, and the optical path communication unit 2412 is provided on the sectors 2411. Figure 2The optical communication part 2412 includes a through hole 24121 and a blocking part 24122. On each sector 241, the through holes 24121 and the blocking part 24122 of the optical communication part 2412 are arranged in a different order, so that the optical communication part 2412 forms a unique identifier corresponding to the optical code of the sector.

[0047] See also Figure 2 When the light emitted by the gear position light emitter 242 passes through the through hole 24121 of the optical path communication part 2412, the gear position light receiver 243 receives the light; when the light emitted by the gear position light emitter 242 passes through the blocking part 24122 of the optical path communication part 2412, the gear position light receiver 243 does not receive the light. Since the through hole 24121 and the blocking part 24122 of the optical path communication part 2412 are arranged in different orders, the gear position light receiver 243 receives different optical path information, so that the optical path communication part 2412 forms a unique optical code. Different sectors 2411 correspond to different optical codes, and thus correspond to different gears of the on-load tap changer 1.

[0048] Optionally, the detection device 2 further includes a pre-selection disk 25 . Figure 3 A schematic structural diagram of a preselection plate of an on-load tap changer gear position detection device according to an exemplary embodiment is shown.

[0049] See also Figure 3 The preselection disk 25 includes a preselection toothed disk 251 , a boss 252 , a preselection dial 253 , a preselection light emitter 254 , a preselection light receiver 255 , an arc groove 2531 , and an extension portion 2532 .

[0050] The preselection disk 25 is provided with a preselection gear 250 on its periphery, and the preselection disk 25 is arranged on the periphery of the center disk 23 and is located on the same horizontal plane as the center disk 23. The preselection disk 25 is spaced apart from the shift disk 24, and the preselection gear 250 is meshed with the center gear 230, so that the preselection disk 25 and the center disk 23 rotate synchronously.

[0051] See also Figure 3 The preselection dial 253 is arranged above the preselection toothed disc 251 and is coaxial with the preselection toothed disc 251. The preselection dial 253 is provided with an arcuate groove 2531 and an extension portion 2532 extending beyond the periphery of the preselection toothed disc 251. The preselection toothed disc 251 is also provided with a boss 252, which is arranged in the arcuate groove 2531 of the preselection dial 253.

[0052] The pre-selection disk 25 further includes n groups of pre-selection light emitters 254 and n groups of pre-selection light receivers 255, wherein n is a positive integer and n≥1.

[0053] When the preselection toothed disc 251 rotates, the boss 252 drives the preselection dial 253 to rotate through the arc groove 2531 , so that the extension of the preselection dial 253 can block part of the light paths in the n groups of preselection light emitters 254 and the n groups of preselection light receivers 255 .

[0054] When the on-load tap changer 1 changes gear, the rotating shaft 11 rotates along with the on-load tap changer 1, so that the main shaft 22 rotates together with the on-load tap changer 1. The center disk 23 rotates together with the main shaft 22, and drives the pre-selection disk 25 to rotate in the same direction.

[0055] When the on-load tap changer 1 changes gear by 1, the on-load tap changer 1 drives the pre-selection disk 25 to rotate 1 circle. Figure 3 When the extension 2532 of the preselection dial 253 is at the lower end of the preselection light emitter 254, the light emitted by the preselection light emitter 254 is blocked by the extension 2532, and the preselection light receiver 255 does not receive the light. When the extension 2532 of the preselection dial 253 is not at the lower end of the preselection light emitter 254, the light emitted by the preselection light emitter 254 is received by the preselection light receiver 255. The preselection light receiver 254 records the position change of the preselection dial 253 by whether or not it receives light, and further determines whether the gear change of the on-load tap changer 1 is to upshift or downshift.

[0056] Optionally, the detection device 2 further includes a sliding plate 26 . Figure 4 A schematic structural diagram of a sliding shift plate of an on-load tap changer shift position detection device according to an example embodiment is shown.

[0057] See also Figure 4 The sliding plate 26 includes: a sliding gear 260, a sliding gear toothed plate 261, a sliding light emitter 262, a sliding light receiver 263, and an arc-shaped through hole 264.

[0058] The outer periphery of the sliding plate 26 is provided with a sliding gear 230, and the sliding plate 26 is arranged on the outer periphery of the center plate 23 and on the same horizontal plane as the center plate 23. The sliding plate 26 is arranged at a distance from the preselection plate 25. The sliding gear 260 is meshed with the center gear 230, so that the sliding plate 26 and the center plate 23 rotate synchronously.

[0059] See also Figure 4 The sliding plate 26 further includes a sliding gear toothed plate 261, k groups of sliding gear light emitters 262 and k groups of sliding gear light receivers 263, wherein k is a positive integer and k≥1. An arc through hole 264 is provided on the sliding gear toothed plate 261, and the sliding gear light emitters 262 communicate with the sliding gear light receivers 263 through the arc through hole 264.

[0060] When the on-load tap changer 1 changes gear, the rotating shaft 11 rotates along with the on-load tap changer 1, so that the main shaft 22 rotates together with the on-load tap changer 1. The center plate 23 rotates together with the main shaft 22, and drives the sliding plate 26 to rotate in the same direction.

[0061] When the on-load tap changer 1 changes gear, the on-load tap changer 1 drives the sliding plate 26 to rotate in the same direction. Figure 4 The sliding light emitter 262 communicates with the sliding light receiver 263 through the arc through hole 264. When the light emitted by the sliding light emitter 262 is received by the sliding light receiver 263 through the arc through hole 264, the on-load tap changer 1 does not slide; when the light emitted by the sliding light emitter 262 is not received by the sliding light receiver 263 through the arc through hole 264, the on-load tap changer 1 slides. Whether the on-load tap changer 1 slides is determined by whether the sliding light receiver 263 receives the optical path information.

[0062] According to another aspect of the present application, a system for distinguishing the gear position of an on-load tap changer is provided. Figure 5 FIG. 2 is a schematic diagram showing a structure of an on-load tap changer position determination system according to an exemplary embodiment. Figure 5 The identification system includes an on-load tap changer 1, a detection device 2, and a processing device 3.

[0063] In the above text of this application specification, it has been combined with Figure 1-Figure 4 The detection device 2 has been described in detail and will not be repeated here.

[0064] According to some embodiments of the present application, the processing device 3 is connected to the m-group gear optical receiver 243. The processing device 3 receives the m-group optical codes received by the m-group gear optical receiver 243 and forms a gear optical code group, and different gear optical code groups uniquely correspond to different gears of the on-load tap changer. The processing device 3 parses the gear of the on-load tap changer according to the optical code group.

[0065] For example, in an exemplary embodiment, the gear plate 24 is provided with 6 groups of gear light emitters 242 and 6 groups of gear light receivers 243, and the gear toothed plate 241 is provided with 8 sectors in total, corresponding to the on-load tap changer gears 1-8 respectively.

[0066] For example, if the light emitted by the gear position light emitter 242 is received by the gear position light receiver 243, the gear position light code is 1; if the light emitted by the gear position light emitter 242 is not received by the gear position light receiver 243, the gear position light code is 0. In this way, the processing device 3 receives a total of 6 gear position light codes, and assembles the 6 gear position light codes into a gear position light code group in a certain order.

[0067] The processing device 3 defines the gear position of the on-load tap changer represented by each gear position optical code group through a predetermined rule, and obtains a gear position corresponding table, and each gear position optical code group corresponds to a unique gear position of the on-load tap changer.

[0068] When the on-load tap changer 1 rotates one gear, the center disk 23 drives the gear disk 24 to rotate. The processing device 3 receives the gear optical code group corresponding to the sector after the gear disk 24 rotates, and parses the current gear of the on-load tap changer 1 according to the gear corresponding table.

[0069] For example, Figure 6 FIG. 2 shows a gear position correspondence table of an on-load tap changer according to an exemplary embodiment. When the gear position optical code group received by the processing device 3 is (000 001), refer to Figure 6 , it can be seen that the current gear position of the on-load tap changer 1 is gear 1. The analysis principle of other gear positions can be obtained in the same way.

[0070] According to some embodiments of the present application, the processing device 3 receives the gear position optical code of the gear position optical receiver 243 and can directly determine the current gear position of the on-load tap changer 1 according to the gear position pair table.

[0071] According to some embodiments of the present application, the processing device 3 is further connected to n groups of pre-selected optical receivers 255. The processing device 3 receives n groups of optical codes received by the n groups of pre-selected optical receivers 255 and forms a pre-selected optical code group. The processing device 3 analyzes the pre-selected optical code group to determine whether the gear position of the on-load tap changer 1 is changed to an upshift or a downshift.

[0072] For example, in an exemplary embodiment, the preselection disk 25 is provided with two groups of preselection light emitters 254 and two groups of preselection light receivers 255, and the arcuate groove 256 has an arc of 180 degrees.

[0073] If the light emitted by the preselected light emitter 254 is received by the preselected light receiver 255, the preselected light code is 1; if the light emitted by the preselected light emitter 254 is not received by the preselected light receiver, the preselected light code is 0. In this way, the processing device 3 receives 2 groups of preselected light codes in total, and groups the preselected light codes into preselected light code groups in a certain order.

[0074] The preselected optical code group has two results: (01) and (10). The processing device 3 defines the gear change of the on-load tap changer represented by the preselected optical code group as upshift or downshift through a predetermined rule.

[0075] For example, the preselected optical code group (01) represents that the current gear position of the on-load tap changer 1 is changed to the up gear, and the preselected optical code group (10) represents that the current gear position of the on-load tap changer 1 is changed to the down gear; or, the preselected optical code group (10) represents that the current gear position of the on-load tap changer 1 is changed to the up gear, and the preselected optical code group (01) represents that the current gear position of the on-load tap changer 1 is changed to the down gear.

[0076] According to some embodiments of the present application, the processing device 3 can determine whether the gear position of the on-load tap changer 1 is changed to an upshift or a downshift according to a preset rule by preselecting the optical path information received by the optical receiver 255 .

[0077] According to some embodiments of the present application, the processing device 3 is further connected to k groups of sliding light receivers 263. The processing device 3 receives the sliding light codes of the k groups of sliding light receivers 263. The processing device 3 determines whether the on-load tap changer 1 has a sliding according to a preset rule.

[0078] For example, in an exemplary embodiment, the sliding gear plate 26 is provided with a group of sliding gear light emitters 262 and a group of sliding gear light receivers 263 .

[0079] If the light emitted by the sliding light emitter 262 is received by the sliding light receiver 236, the sliding light code is 1; if the light emitted by the sliding light emitter 262 is received by the non-sliding light receiver 263, the sliding light code is 0.

[0080] According to the preset rules of the processing device 3 , when the sliding optical code received by the processing device 3 is 1, the on-load tap changer 1 does not slide; when the sliding optical code received by the processing device 3 is 0, the on-load tap changer 1 slides.

[0081] According to some embodiments of the present application, the processing device 3 can determine whether the on-load tap changer 1 has slipped according to preset rules based on the optical path information received by the slip light receiver.

[0082] The present application provides a load tap changer gear position detection device and discrimination system, wherein the detection device 2 detects the optical path information received by the gear position optical receiver 243, the preselection optical receiver 255, and the sliding gear optical receiver 263. The processing device 3 discriminates the current gear position and the preselection gear position of the load tap changer 1 according to the optical path information and preset rules, and can judge whether the load tap changer 1 has slipped.

[0083] The on-load tap changer gear detection device and discrimination system provided in the present application analyze the gear status of the on-load tap changer by collecting gear information through the detection device and processing the gear judgment information through the processing device. This avoids the situation in the prior art where when the on-load tap changer gear information is uploaded through the relay, the transformer is repeatedly adjusted to a faulty relay node, thereby causing gear information upload errors. Therefore, this technical solution improves the reliability of the OLTC in the UHV converter transformer, thereby improving the stable and reliable operation of the UHV converter transformer.

[0084] Finally, it should be noted that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions of the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A device for detecting the gear position of an on-load tap changer, characterized in that: The on-load tap changer comprises a rotating shaft, and the detection device comprises: a main shaft, a shaft sleeve, a center plate, and a gear plate; One end of the main shaft is connected to the rotating shaft through the shaft sleeve so as to rotate synchronously with the rotating shaft, and the other end of the main shaft passes through the center of the center disk and is connected to the center disk so as to rotate synchronously with the center disk; The outer circumferences of the shift plate and the center plate are both provided with gears; The shift plate is arranged on the outer periphery of the center plate and is located on the same horizontal plane as the center plate, and is meshed with the center plate to rotate synchronously with the center plate; The gear plate comprises a gear tooth plate, m groups of gear light emitters and m groups of gear light receivers, the gear tooth plate is provided with an optical path communication part, and the gear light receiver forms an optical code according to the light emitted by the gear light emitter passing through the optical path communication part, wherein m is a positive integer and m≥2; The detection device also includes: A pre-selection disk, wherein a gear is arranged on the outer periphery of the pre-selection disk, the pre-selection disk is arranged on the outer periphery of the center disk and is located on the same horizontal plane as the center disk, is spaced apart from the shift disk, and is meshed with the center disk to rotate synchronously with the center disk; The preselection disk includes a preselection toothed disk and a preselection dial, wherein the preselection dial is arranged above the preselection toothed disk and coaxially with the preselection toothed disk, and the preselection dial is provided with an arc-shaped groove, and the preselection dial is also provided with an extension portion extending beyond the outer periphery of the preselection toothed disk; The preselection toothed disc is provided with a boss, and the boss is located in the arc-shaped groove of the preselection dial; The pre-selection disk further includes n groups of pre-selected light emitters and n groups of pre-selected light receivers, wherein n is a positive integer and n≥1; When the preselection toothed disc rotates, the boss drives the preselection dial to rotate through the arc groove, so that the extension blocks part of the light paths in the n groups of preselection light emitters and the n groups of preselection light receivers.

2. The detection device according to claim 1, characterized in that The gear plate also includes: The gear gear disc is preset with sectors having the same number as the gear positions of the on-load tap changer; The optical path communication portion includes a through hole and a blocking portion; Among them, on each of the sectors, the arrangement order of the through holes and the blocking parts of the optical path communication part is different to form an optical code that uniquely identifies the corresponding sector.

3. The detection device according to claim 2, characterized in that: The detection device also includes: A sliding plate, wherein a gear is arranged on the outer periphery of the sliding plate, the sliding plate is arranged on the outer periphery of the central plate and is located on the same horizontal plane as the central plate, is arranged at intervals from the shift plate and the pre-selection plate, and is meshed with the central plate to rotate synchronously with the central plate; The sliding plate also includes a sliding gear plate, k groups of sliding light emitters and k groups of sliding light receivers. The sliding gear plate is provided with an arc-shaped through hole. The sliding light emitters communicate with the sliding light receivers through the arc-shaped through holes, wherein k is a positive integer and k≥1.

4. A system for distinguishing the gear position of an on-load tap changer, characterized in that: The device comprises the detection device and the processing device as claimed in claim 3, wherein the processing device is connected to the m groups of gear position optical receivers, receives the m groups of optical codes received by the m groups of gear position optical receivers to form a gear position optical code group, and parses the gear position of the on-load tap changer according to the optical code group; Wherein, different gear position optical code groups uniquely correspond to different gear positions of the on-load tap changer.

5. The identification system according to claim 4, characterized in that: The processing device is also connected to the n groups of pre-selected optical receivers, receives the n groups of optical codes received by the n groups of pre-selected optical receivers to form pre-selected optical code groups, and analyzes the gear change of the on-load tap changer to upshift or downshift according to the pre-selected optical code groups.

6. The identification system according to claim 5, characterized in that: The processing device is also connected to the k groups of sliding light receivers, receives optical codes from the k groups of sliding light receivers, and determines whether the on-load tap changer is sliding according to a preset rule.

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