阅读说明：本技术 有载分接开关档位检测装置及判别系统 (On-load tap-changer gear detection device and discrimination system ) 是由 方太勋 陈羽 孙超 卢宇 谢晔源 吕玮 石巍 许元震 赵玉灿 于 2021-06-24 设计创作，主要内容包括：本申请提供一种有载分接开关档位检测装置及判别系统。所述判别系统包括检测装置和处理装置。检测装置包括：主轴、轴套、中心盘、档位盘、预选盘、滑档盘。档位盘、预选盘和滑档盘均设置在中心盘的外周,且档位盘、预选盘和滑档盘均与中心盘在同一水平面。处理装置连接检测装置,通过档位盘解析有载分接开关的当前档位,处理装置通过预选盘解析有载分接开关的档位变换为加档或者减档,处理装置通过滑档盘解析有载分接开关是否发生滑档。本申请通过有载分接开关档位检测装置及判别系统解析有载分接开关的当前档位、预选档位和进行滑档判别,提高了特高压换流变压器OLTC的可靠性,从而提高了特高压换流变压器稳定可靠的运行。(The application provides a gear detection device and a discrimination system for an on-load tap-changer. The discrimination system includes a detection device and a processing device. The detection device comprises: the device comprises a main shaft, a shaft sleeve, a central disc, a gear disc, a pre-selection disc and a sliding gear disc. The gear disc, the preselection disc and the sliding gear disc are all arranged on the periphery of the central disc, and the gear disc, the preselection disc and the sliding gear disc are all on the same horizontal plane with the central disc. The processing device is connected with the detection device, analyzes the current gear of the on-load tap-changer through the gear disc, analyzes the gear of the on-load tap-changer through the pre-selection disc and converts the gear into an upshift or a downshift, and the processing device analyzes whether the on-load tap-changer has a slide gear or not through the slide gear disc. According to the method and the device, the current gear and the pre-selected gear of the on-load tap-changer are analyzed and the slip gear is judged through the on-load tap-changer gear detection device and the judgment system, so that the reliability of the ultra-high voltage converter transformer OLTC is improved, and the stable and reliable operation of the ultra-high voltage converter transformer is improved.)

1. An on-load tap changer gear detection device, the on-load tap changer comprising a rotating shaft, the detection device comprising: the gear shifting device comprises a main shaft, a shaft sleeve, a central disc and a gear shifting disc;

one end of the main shaft is connected with the rotating shaft through the shaft sleeve so as to synchronously rotate with the rotating shaft, and the other end of the main shaft penetrates through the center of the central disc and is connected with the central disc so as to synchronously rotate with the central disc;

gears are arranged on the peripheries of the gear disc and the central disc;

the gear disc is arranged on the periphery of the central disc, is positioned on the same horizontal plane with the central disc, and is meshed with the central disc so as to synchronously rotate with the central disc;

the gear disc comprises a gear toothed disc, m groups of gear light emitters and m groups of gear light receivers, the gear toothed disc is provided with a light path communication portion, the gear light receivers form light codes according to light rays emitted by the gear light emitters passing through the light path communication portion, and m is a positive integer and is larger than or equal to 2.

2. The sensing device of claim 1, wherein the shift dial further comprises:

the gear fluted disc is preset with sectors with the same number as the gears of the on-load tap-changer;

the optical path communication part comprises a through hole and a blocking part;

on each sector, the arrangement sequence of the through holes and the blocking parts of the optical path communication part is different so as to form an optical code uniquely identifying the corresponding sector.

3. The sensing device of claim 2, further comprising:

the preselection disc is arranged on the periphery of the central disc, is positioned on the same horizontal plane with the central disc, is arranged at intervals with the gear disc, and is meshed with the central disc so as to synchronously rotate with the central disc;

the preselection disc comprises a preselection fluted disc and a preselection drive plate, the preselection drive plate is arranged above the preselection fluted disc and is coaxial with the preselection fluted disc, the preselection drive plate is provided with an arc-shaped groove, and the preselection drive plate is also provided with an extension part extending beyond the periphery of the preselection fluted disc;

the preselection fluted disc is provided with a boss which is positioned in the arc-shaped groove of the preselection drive plate;

the preselection disc also comprises n groups of preselection light emitters and n groups of preselection light receivers, wherein n is a positive integer and is more than or equal to 1;

when the preselection fluted disc rotates, the boss drives the preselection drive plate to rotate through the arc-shaped groove, so that the extending part blocks partial light paths in the n groups of preselection light emitters and the n groups of preselection light receivers.

4. The sensing device of claim 3, further comprising:

the sliding gear disc is arranged on the periphery of the central disc, is positioned on the same horizontal plane with the central disc, is arranged at intervals with the gear disc and the preselection disc, is meshed with the central disc and synchronously rotates with the central disc;

the sliding gear disc further comprises a sliding gear disc, k groups of sliding gear light emitters and k groups of sliding gear light collectors, wherein an arc-shaped through hole is formed in the sliding gear disc, the sliding gear light emitters are in optical communication with the sliding gear light collectors through the arc-shaped through hole, k is a positive integer and is larger than or equal to 1.

5. An on-load tap-changer gear discrimination system, characterized by comprising the detection device and the processing device of claims 1-4, wherein the processing device is connected with the m groups of gear light receivers, receives the m groups of optical codes received by the m groups of gear light receivers to form a gear optical code group, and analyzes the gear of the on-load tap-changer according to the optical code group;

and different gear light code groups uniquely correspond to different gears of the on-load tap-changer.

6. The discrimination system according to claim 5 wherein said processing means is further connected to said n sets of pre-selection receivers for receiving n sets of optical codes received by said n sets of pre-selection receivers to form a set of pre-selected optical codes, and wherein said on-load tap changer gear shift is resolved from said set of pre-selected optical codes as either an upshift or a downshift.

7. The determination system according to claim 6, wherein the processing device is further connected to the k sets of sliding-rail light collectors, receives optical codes of the k sets of sliding-rail light collectors, and determines whether the on-load tap-changer slides according to a preset rule.

Technical Field

The application belongs to the field of transformer equipment, and particularly relates to a gear detection device and a discrimination system for an on-load tap-changer.

Background

An ON-LOAD TAP-CHANGE (OLTC) switch is a voltage regulator used to CHANGE the tapping connection position of transformer windings. OLTC operates under transformer excitation or load conditions. The OLTC realizes switching among taps in a transformer winding under the condition of ensuring that the load current of the transformer is not interrupted, thereby changing the number of turns of the winding and finally realizing the purpose of voltage regulation.

However, the applicant found that when the OLTC is applied in an extra-high voltage converter transformer, the following problems exist.

1. The extra-high voltage converter transformer operates at full load and high voltage for a long time, so that the current flowing through the OLTC is large.

2. The load current flowing through the on-load tap changer of the extra-high voltage converter transformer is not a sine wave but a current waveform with a phase change process, so that the di/dt of a zero crossing point is large, and arc quenching is difficult.

3. The OLTC in the extra-high voltage converter transformer operates frequently, the operation frequency can reach 4000 times/year, and the requirement on the mechanical performance of the OLTC is high.

4. The OLTC is in a black box state during operation without any electric quantity detection, and cannot judge the transient working state in the switching process.

5. At present, OLTC applied to ultra-high voltage direct current transmission engineering used in China is provided by foreign manufacturers, and accident analysis and improvement cannot be controlled independently.

Therefore, it is very important to correctly judge the gear information of the extra-high voltage converter transformer OLTC for the stable operation of the extra-high voltage system. At present, an extra-high voltage converter transformer OLTC judges the gear information of an on-load tap-changer through an electric mechanism of the on-load tap-changer so as to judge the gear of the transformer.

The applicant has found that the gear of the on-load tap-changer can be judged only by the number of turns of the driving motor of the electric mechanism of the on-load tap-changer, and the following disadvantages exist.

1. The drive motor of the electric mechanism of the on-load tap-changer is connected with the drive spindle of the on-load tap-changer mechanism through a multi-link mechanical transmission rod. When the electric mechanism judges the gear of the electric mechanism and whether the gear slides or not through the rotating number of turns of the driving motor, if any link in the multi-link mechanical transmission rod is abnormal, the condition that the driving motor rotates and the on-load tap-changer mechanism does not rotate occurs, and the gear is mistakenly sent.

2. The gear information of the electric mechanism is sent by a relay, and in an extra-high voltage converter transformer, the number of times of gear shifting of the transformer is large. For example, the dc converter transformer may be shifted 4000 times a year. The high-frequency operation easily causes the relay to be damaged, so that the relay cannot normally send gear information.

Disclosure of Invention

According to an aspect of the application, an on-load tap-changer gear detection device is provided.

This on-load tap-changer includes the axis of rotation, and detection device includes: main shaft, axle sleeve, central disk, gear dish. One end of the main shaft of the detection device is connected with the rotating shaft through a shaft sleeve and synchronously rotates with the rotating shaft. The other end of the main shaft penetrates through the center of the central disc, is connected with the central disc and synchronously rotates with the central disc. The gear disc is arranged on the periphery of the central disc, is positioned on the same horizontal plane with the central disc, is meshed with the central disc and synchronously rotates with the central disc, comprises a gear disc, m groups of gear light emitters and m groups of gear light receivers, and is provided with a light path communication part. The gear light receiver forms an optical code according to light rays emitted by the gear light emitter of the light path communication part, wherein m is a positive integer and is more than or equal to 2.

According to some embodiments of the application, the shift disk further comprises: the gear fluted disc is preset with sectors with the same number as the gears of the on-load tap-changer. The optical path communication part also comprises through holes and blocking parts, wherein the through holes and the blocking parts of the optical path communication part are arranged in different orders on each sector so as to form an optical code uniquely identifying the corresponding sector.

According to some embodiments of the application, the detection device further comprises: and the periphery of the preselection disc is provided with a gear. The preselection disc is arranged on the periphery of the central disc, is positioned on the same horizontal plane with the central disc, is arranged at intervals with the gear disc, is meshed with the central disc and synchronously rotates with the central disc.

The preliminary election dish still includes preliminary election fluted disc and preliminary election driver plate, and preliminary election driver plate setting is in preliminary election fluted disc top and with preliminary election fluted disc coaxial arrangement, and preliminary election driver plate is provided with the arc wall, and preliminary election driver plate still is provided with the extension that extends beyond preliminary election fluted disc periphery. The preselection fluted disc is also provided with a boss which is positioned in the arc-shaped groove of the preselection drive plate. The pre-selection tray also comprises n groups of pre-selection light emitters and n groups of pre-selection light receivers, wherein n is a positive integer and n is more than or equal to 1. When the preselection fluted disc rotates, the preselection boss drives the preselection drive plate to rotate through the arc-shaped groove, so that the extension part can block partial light paths in n groups of preselection light emitters and n groups of preselection light receivers.

According to some embodiments of the application, the detection device further comprises: the sliding gear disc is arranged on the periphery of the central disc, is positioned on the same horizontal plane with the central disc, is arranged at intervals with the gear disc and the preselection disc, is meshed with the central disc and synchronously rotates with the central disc.

The sliding gear disc also comprises a sliding gear disc, k groups of sliding gear light emitters and k groups of sliding gear light collectors, wherein the sliding gear disc is provided with an arc-shaped through hole, the sliding gear light emitters are in optical communication with the sliding gear light collectors through the arc-shaped through hole, k is a positive integer and is larger than or equal to 1.

According to another aspect of the present application, there is included an on-load tap changer gear discrimination system. The discrimination system may comprise the on-load tap-changer gear detection device and the processing device.

The processing device is connected with m groups of gear light receivers, receives m groups of optical codes received by the m groups of gear light receivers, forms a gear optical code group, and analyzes the gear of the on-load tap-changer according to the optical code group. Wherein, different gear optical code groups uniquely correspond to different gears of the on-load tap-changer.

According to some embodiments of the present application, the processing device is further connected to n sets of pre-selection optical receivers, receives n sets of optical codes received by the n sets of pre-selection optical receivers, forms a set of pre-selection optical codes, and resolves a gear shift change of the on-load tap-changer into an upshift or a downshift according to the set of pre-selection optical codes.

According to some embodiments of the present application, the processing device is further connected to k sets of sliding-rail light receivers, receives optical codes of the k sets of sliding-rail light receivers, and determines whether the on-load tap-changer slides according to a preset rule.

According to the gear detection device and the gear judgment system for the on-load tap-changer, the detection device is provided with the main shaft, and the main shaft is connected with the rotating shaft connected with the on-load tap-changer through the shaft sleeve. The main shaft rotates synchronously with the rotating shaft, and the central disc and the main shaft rotate synchronously. The peripheries of the central disc and the gear disc are respectively provided with gears, and the gears of the central disc are meshed with the gears of the gear disc, so that the gear disc and the central disc synchronously rotate. The gear disc is provided with a gear light emitter and a gear light receiver, the gear disc is also provided with sectors with the same number as the gears of the on-load tap-changer, and the sectors are provided with light path communication parts. The light emitted by the gear position light emitter is received by the gear position light receiver through the light path communication part to form an optical code. The m groups of gear light receivers receive the m optical codes to form gear light code groups, and each gear light code group corresponds to a unique gear of the on-load tap-changer. And analyzing the current gear information of the on-load tap-changer according to the gear optical code group.

The detection device provided by the application receives the gear information to analyze the gear of the on-load tap-changer, so that the condition that the gear information is uploaded wrongly due to the fact that the relay node fails due to multiple gear shifting of the transformer in the prior art is avoided, the reliability of the on-load tap-changer in the ultra-high voltage converter transformer is improved, and the stable operation of the ultra-high voltage converter transformer is guaranteed.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 shows a schematic structural view of an on-load tap changer gear detection device according to an exemplary embodiment;

fig. 2 shows a schematic structural view of a range disc of an on-load tap changer range detection arrangement according to an example embodiment;

fig. 3 shows a schematic structural view of a pre-selection plate of an on-load tap changer step detection device according to an exemplary embodiment;

fig. 4 shows a schematic structural view of a slide plate of an on-load tap changer gear detection device according to an exemplary embodiment;

fig. 5 shows a schematic structural diagram of an on-load tap changer gear discrimination system according to an example embodiment;

fig. 6 shows a range mapping table for an on-load tap changer according to an example embodiment.

The reference numbers illustrate:

an on-load tap-changer 1; a gear detection device 2; a processing device 3; a rotating shaft 11; a shaft sleeve 21; a main shaft 22; a central disc 23; a shift dial 24; a pre-selection tray 25; a shift disk 26; a sun gear 230; a range gear 240; a gear toothed disc 241; a shift position light emitter 242; a shift register 243; a sector 2411; an optical path communication unit 2412; a through hole 24121; a blocking section 24122; a pre-selection gear 250; a pre-selection toothed disc 251; a boss 252; a pre-selection dial 253; a pre-selected light emitter 254; a pre-selection light receiver 255; an arcuate slot 2531; an extension 2532; a slide gear 260; a sliding gear toothed disc 261; a slide light emitter 262; a slide light collector 263; an arc-shaped through hole 264.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus, a repetitive description thereof will be omitted.

The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the embodiments of the disclosure can be practiced without one or more of the specific details, or with other means, components, materials, devices, or the like. In such cases, well-known structures, methods, devices, implementations, materials, or operations are not shown or described in detail.

Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions.

According to an aspect of the application, an on-load tap-changer gear detection device is provided. The detection device will be described below with reference to fig. 1 to 4.

Fig. 1 shows a schematic structural view of an on-load tap changer step detection device according to an exemplary embodiment. Referring to fig. 1, an on-load tap changer 1 comprises a rotating shaft 11. The on-load tap-changer gear detection device 2 includes: a sleeve 21, a main shaft 22, a central disk 23 and a gear disk 24.

One end of the main shaft 22 is connected to the rotary shaft 11 through the sleeve 21 and rotates in synchronization with the rotary shaft 11. The other end of the main shaft 22 penetrates the center of the center plate 23, is connected with the center plate 23, and can rotate synchronously with the center plate 23. The gear disc 24 is provided with a gear 240 on the outer periphery thereof, and the central disc 23 is provided with a central gear 230 on the outer periphery thereof. The shift disks 24 are disposed on the outer periphery of the center disk 23 and are located on the same horizontal plane as the center disk 23. The range gear 240 is engaged with the sun gear 230 so that the range disk 24 rotates synchronously with the sun disk 23.

Fig. 2 shows a schematic structural view of a gearshift disc of an on-load tap changer step detection arrangement according to an example embodiment. Referring to fig. 2, the shift lever 24 further includes a shift lever gear plate 241, m groups of shift light emitters 242, and m groups of shift light receivers 243.

Referring to fig. 2, the gear tooth disc 241 is further provided with an optical path communication portion 2412, and the gear light receiver 243 forms an optical code according to light emitted by the gear light emitter 242 of the optical path communication portion 2412, where m is a positive integer and is greater than or equal to 2.

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. The central disk 23 rotates together with the main shaft 22 and drives the shift disk 24 to rotate in the same direction.

When the gear of the on-load tap-changer 1 is changed to 1 gear, the on-load tap-changer 1 drives the gear disc 24 to rotate for 1 circle. The gear optical receiver 243 obtains the current gear information of the on-load tap-changer gear 1 by changing the optical code of the optical path communication part.

Optionally, the gear tooth disc 241 is further provided with sectors 2411 with the same number as the number of the on-load tap-changer gears, and the optical path communication part 2412 is provided on the sectors 2411. Referring to fig. 2, the optical path communication part 2412 includes a through hole 24121 and a blocking part 24122. In each sector 241, the through holes 24121 and the blocking parts 24122 of the optical path communication part 2412 are arranged in different orders, so that the optical path communication part 2412 forms a unique identifier to correspond to the optical code of the sector.

Referring to fig. 2, when the light emitted from the shift position light emitter 242 passes through the through hole 24121 of the optical path communication portion 2412, the shift position light receiver 243 receives the light; when the light emitted from the shift position light emitter 242 is not blocked 24122 by the light path communication unit 2412, the shift position light receiver 243 does not receive the light. Since the through holes 24121 and the blocking parts 24122 of the optical path communication part 2412 are arranged in different orders, the light path 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 further correspond to different gears of the on-load tap-changer 1.

Optionally, the detection device 2 further comprises a preselection plate 25. Fig. 3 shows a schematic structural view of a preselection plate of an on-load tap changer step detection device according to an exemplary embodiment.

Referring to fig. 3, pre-selection plate 25 includes a pre-selection toothed plate 251, a boss 252, a pre-selection dial 253, a pre-selection light emitter 254, a pre-selection light receiver 255, an arcuate slot 2531, and an extension 2532.

The outer circumference of the preselection plate 25 is provided with preselection gears 250, and the preselection plate 25 is arranged on the outer circumference of the center plate 23 and on the same level as the center plate 23. Preselection plate 25 is spaced from shift plate 24 and preselection gear 250 is in meshing engagement with central gear 230 so that preselection plate 25 rotates synchronously with central plate 23.

Referring to fig. 3, pre-selection dial 253 is disposed above pre-selection toothed plate 251 and is coaxial with pre-selection toothed plate 251. The pre-selection dial 253 is provided with an arcuate slot 2531 and also with an extension 2532 extending beyond the outer periphery of the pre-selection toothed disc 251. Pre-selection toothed disc 251 is further provided with a boss 252, boss 252 being disposed in an arcuate slot 2531 with pre-selection dial 253.

The pre-selection tray 25 also includes n sets of pre-selection light emitters 254 and n sets of pre-selection light receivers 255, where n is a positive integer and n ≧ 1.

When the pre-selection toothed disc 251 rotates, the boss 252 drives the pre-selection dial 253 to rotate through the arc-shaped slot 2531, so that the extension portion of the pre-selection dial 253 can block part of the light paths in the n groups of pre-selection light emitters 254 and the n groups of pre-selection light collectors 255.

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. The central disk 23 rotates together with the main shaft 22 and carries the preselection disk 25 in the same direction.

When the gear of the on-load tap-changer 1 is changed to 1 gear, the on-load tap-changer 1 drives the pre-selection disc 25 to rotate for 1 circle. Referring to fig. 3, when the extension 2532 of the pre-selection dial 253 is at the lower end of the pre-selection light emitter 254, the light emitted from the pre-selection light emitter 254 is blocked by the extension 2532 and the pre-selection light emitter 255 does not receive the light. When the extension 2532 of the pre-selection dial 253 is not at the lower end of the pre-selection light emitter 254, the light emitted from the pre-selection light emitter 254 is received by the pre-selection light receiver 255. The preselection light receiver 254 records the position change of the preselection plate 25 by the presence or absence of light reception, and further determines whether the shift position of the on-load tap changer 1 is changed to upshift or downshift.

Optionally, the detection device 2 further comprises a kick-off plate 26. Fig. 4 shows a schematic structural view of a slide plate of an on-load tap-changer step detection device according to an exemplary embodiment.

Referring to fig. 4, the kicker plate 26 includes: a slide gear 260, a slide fluted disc 261, a slide illuminator 262, a slide light collector 263 and an arc through hole 264.

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 central plate 23 and is on the same horizontal plane with the central plate 23. The catch disk 26 is spaced from the preselection disk 25. The kick gear 260 is meshed with the sun gear 230 so that the kick plate 26 rotates in synchronization with the center plate 23.

Referring to FIG. 4, the sliding plate 26 further includes a sliding plate gear 261, k sets of sliding plate illuminators 262 and k sets of sliding plate illuminators 263, where k is a positive integer and k is greater than or equal to 1. An arc-shaped through hole 264 is formed in the sliding gear fluted disc 261, and the sliding gear light emitter 262 is communicated with the sliding gear light collector 263 through the arc-shaped through hole 264.

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. The central disk 23 rotates together with the main shaft 22 and drives the shift disk 26 to rotate in the same direction.

When the gear of the on-load tap-changer 1 is changed, the on-load tap-changer 1 drives the sliding gear disc 26 to rotate in the same direction. Referring to fig. 4, the slide light emitter 262 communicates with the slide light receiver 263 through the arc through hole 264, and when the light emitted from the slide light emitter 262 is received by the slide light receiver 263 through the arc through hole 264, the on-load tap-changer 1 does not slide; when the light emitted from the slide illuminator 262 is not received by the slide receiver 263 through the arc through hole 264, the on-load tap-changer 1 slides. Whether the on-load tap-changer 1 slips or not is judged by whether the optical path information is received or not through the sliding light receiver 263.

According to another aspect of the present application, an on-load tap changer gear discrimination system is provided. Fig. 5 shows a schematic structural diagram of an on-load tap changer step discrimination system according to an example embodiment. Referring to fig. 5, the discrimination system comprises an on-load tap changer 1, a detection device 2 and a processing device 3.

In the above of the present specification, the detection device 2 has been described in detail with reference to fig. 1 to 4, and will not be described again.

According to some embodiments of the present application, the processing device 3 is connected to m sets of range light collectors 243. The processing device 3 receives m groups of optical codes received by the m groups of gear optical receivers 243, and forms gear optical code groups, wherein different gear optical code groups uniquely correspond to different gears of the on-load tap-changer. The processing device 3 analyzes the gear of the on-load tap-changer according to the optical code group.

For example, in one exemplary embodiment, the range disk 24 is provided with 6 sets of range lights 242 and 6 sets of range receivers 243, and the range gear disk 241 is provided with a total of 8 sectors, corresponding to ranges 1-8 of the on-load tap-changer.

For example, if the light emitted from the shift position light emitter 242 is received by the shift position light receiver 243, the shift position optical code is 1; if the light emitted from the shift position light emitter 242 is received by the non-shift position light receiver 243, the shift position optical code is 0. Thus, the processing device 3 receives 6 gear optical codes in total, and the 6 gear optical codes form a gear optical code group according to a certain sequence.

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

When the on-load tap-changer 1 is rotated by one gear, the central disc 23 drives the gear disc 24 to rotate. The processing device 3 receives the gear optical code group corresponding to the sector after the gear disc 24 rotates, and resolves the current gear of the on-load tap-changer 1 according to the gear correspondence table.

For example, fig. 6 shows a range mapping table for an on-load tap changer according to an example embodiment. When the shift light code group received by the processing device 3 is (000001), referring to fig. 6, it can be known that the current shift of the on-load tap-changer 1 is the 1 shift. Other gear analysis principles can be obtained by the same principle.

According to some embodiments of the present application, the current gear of the on-load tap changer 1 can be directly determined by the gear optical code of the gear optical receiver 243 received by the processing device 3 and according to the gear pair combination table.

According to some embodiments of the present application, the processing means 3 are also connected to n sets of pre-receivers 255. The processing means 3 receives n sets of optical codes received by the n sets of pre-selection receivers 255 and forms a set of pre-selection optical codes. The processing device 3 resolves the gear change of the on-load tap-changer 1 to be an upshift or a downshift according to the preselected optical code group.

For example, in one exemplary embodiment, the pre-selection tray 25 is provided with 2 sets of pre-selection light emitters 254 and 2 sets of pre-selection light collectors 255, with the arc of the arcuate slot 256 being 180 degrees.

If the light emitted by the pre-selection light emitter 254 is received by the pre-selection light receiver 255, the pre-selection optical code is 1; if the light emitted by the pre-selected light emitter 254 is not received by the pre-selected light receiver, the pre-selected optical code is 0. Thus, the processing means 3 receives 2 sets of preselected optical codes in total and combines the preselected optical codes into a set of preselected optical codes in a certain order.

The preselected optical code set has (01) (10) two results. The processing means 3 defines by means of predetermined rules whether the gear change of the on-load tap changer represented by the preselected optical code set is an upshift or a downshift.

For example, the pre-selection light code group (01) represents that the current gear of the on-load tap-changer 1 is changed into an upshift, and the pre-selection light code group (10) represents that the current gear of the on-load tap-changer 1 is changed into a downshift; or the pre-selection light code group (10) represents that the current gear of the on-load tap-changer 1 is changed into an upshift, and the pre-selection light code group (01) represents that the current gear of the on-load tap-changer 1 is changed into a downshift.

According to some embodiments of the present application, the processing device 3 may determine that the shift position of the on-load tap-changer 1 is changed to an upshift or a downshift according to a preset rule by the light path information received by the pre-selector 255.

According to some embodiments of the present application, the processing device 3 is further connected to k sets of slide receivers 263. The processing device 3 receives the sliding code of the k sets of sliding light receivers 263. The processing device 3 judges whether the on-load tap-changer 1 has a sliding gear according to a preset rule.

For example, in one exemplary embodiment, the slide tray 26 is provided with 1 set of slide lights 262 and 1 set of slide receivers 263.

If the light emitted from the slide illuminator 262 is received by the slide collector 236, the slide code is 1; if the light emitted from the sliding light emitter 262 is received by the non-sliding light receiver 263, the sliding code is 0.

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

According to some embodiments of the present application, the processing device 3 may determine whether the on-load tap-changer 1 slips according to a preset rule through the optical path information received by the slip beam collector.

The application provides an on-load tap-changer gear detection device and a discrimination system, wherein a detection device 2 detects light path information received by a gear light receiver 243, a pre-selection light receiver 255 and a sliding gear light receiver 263. The processing device 3 judges the current gear and the pre-selected gear of the on-load tap-changer 1 according to the preset rule through the light path information, and can judge whether the on-load tap-changer 1 slips or not.

The gear state of the on-load tap-changer is analyzed in the mode that the detection device receives gear information and the processing device judges the gear information. The condition that gear information uploading is wrong due to the fact that a relay node is broken down caused by multiple times of gear shifting of a transformer when the gear information of the on-load tap-changer is uploaded through the relay in the prior art is avoided. Therefore, the technical scheme improves the reliability of the OLTC in the ultra-high voltage converter transformer, thereby improving the stable and reliable operation of the ultra-high voltage converter transformer.

Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present application, and are not intended to limit the present application, and although the present application is described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the above-mentioned embodiments, or equivalents may be substituted for some of the technical features. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.