CN115343607A - On-load tap-changer sliding gear monitoring device and control method - Google Patents
On-load tap-changer sliding gear monitoring device and control method Download PDFInfo
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- CN115343607A CN115343607A CN202210807670.9A CN202210807670A CN115343607A CN 115343607 A CN115343607 A CN 115343607A CN 202210807670 A CN202210807670 A CN 202210807670A CN 115343607 A CN115343607 A CN 115343607A
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- 230000005571 horizontal transmission Effects 0.000 claims description 13
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
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Abstract
The invention discloses a device for monitoring a sliding gear of an on-load tap-changer and a control method thereof, wherein the device comprises a mechanism, an external transmission mechanism and a rotary coding mechanism which are coaxially arranged with a transmission shaft or a driving main shaft of the on-load tap-changer, and a judging device for receiving a coded signal of a rotation angle or a turn number to carry out logic judgment on the sliding gear, and can alarm or protect the sliding gear fault. The on-load tap-changer can be installed and configured for the existing on-load tap-changer which is put into operation and has or can have slide rail faults. When the sliding gear fault occurs, the sliding gear protection can be carried out in time, so that the electric mechanism stops rotating, the abnormal gear shifting of the on-load tap-changer is avoided, and the operation reliability and the safety of the on-load tap-changer can be improved.
Description
Technical Field
The application relates to the technical field of transformers, in particular to a device for monitoring a slide gear of an on-load tap-changer and a control method.
Background
An ON-LOAD TAP-CHANGE (OLTC) is a voltage regulator used to CHANGE the tapping connection position of transformer windings. The reliable tap changer operating mechanism box is the key for ensuring smooth adjustment of voltage gears.
The existing tap changer operating mechanism box has simple logic and limited functions of monitoring and protecting measures. When a gear slipping accident occurs, the mechanism box cannot provide sufficient protection measures, and the gear shifting of the next wheel is automatically started due to the fact that the rotation of the main shaft of the operating mechanism box exceeds the limit, so that the gear slipping accident is caused. Meanwhile, no relevant monitoring and protecting equipment for dealing with the sliding gear accidents is available at present.
Therefore, in order to reduce the sliding gear accident and improve the reliability and stability of gear shifting, an externally mounted device for monitoring the sliding gear of the on-load tap-changer is needed, and the monitoring and the protection of the sliding gear fault are realized by monitoring the key output quantity of the operating mechanism box.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a device and a control method for monitoring the sliding gear of an on-load tap-changer, so as to solve the problems of difficult alarm and protection caused by sliding gear accidents of the on-load tap-changer.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
in a first aspect, the invention provides a sliding gear monitoring device for an on-load tap-changer, which is installed on the on-load tap-changer, wherein the on-load tap-changer comprises an electric mechanism, a transmission mechanism and a tap-changer;
the electric mechanism is connected with the transmission mechanism and controls the action of the tap changer through the transmission mechanism;
the transmission mechanism comprises a vertical transmission rod, a gear mechanism, a horizontal transmission rod and a gear mechanism;
the tap changer comprises a tap changer body and a tap changer main shaft;
the sliding gear monitoring device comprises:
the transmission rod coaxial rotating mechanism comprises: the on-load tap-changer is arranged on the on-load tap-changer and synchronously rotates with the transmission mechanism;
an external transmission mechanism: the transmission rod coaxial rotating mechanism is in transmission connection with the transmission rod coaxial rotating mechanism and rotates synchronously with the transmission rod coaxial rotating mechanism;
the rotary coding mechanism: the device is connected to the external transmission mechanism and used for recording the rotation angle or the ring speed of the external transmission mechanism and converting the rotation angle or the ring speed into a coded signal;
a slide gear judgment device: and the rotating coding mechanism is connected with the rotating coding mechanism and used for receiving the coded signals output by the rotating coding mechanism, judging whether the on-load tap-changer has a sliding gear according to the coded signals, and outputting alarm signals when judging that the sliding gear has occurred.
Furthermore, the transmission rod coaxial rotating mechanism is coaxially installed with the vertical transmission rod or the horizontal transmission rod or the main shaft of the tap changer.
Furthermore, the transmission rod coaxial rotating mechanism is of a semicircular clamping structure, is spliced by two semicircular gear discs and is fixed on the vertical transmission rod or the horizontal transmission rod or the main shaft of the tap changer in a two-screw fastening mode.
Further, the transmission connection structure of the coaxial rotating mechanism of the transmission rod and the external transmission mechanism comprises: any one of a gear drive, worm drive, belt drive, or chain drive.
Furthermore, the rotating coding mechanism can convert the rotating angle or the ring speed of the external transmission mechanism into a coded signal, and further can convert the calculated rotating angle or the ring speed.
Further, the sliding gear judging device can receive a coding signal output by the rotary coding mechanism, and can calculate the rotating angle of the vertical transmission rod in real time through the coding signal, and if the rotating angle exceeds the maximum angle value allowed by single gear shifting, the sliding gear of the on-load tap-changer is judged.
Further, the method for outputting the warning signal by the sliding gear judging device comprises the following steps: and outputting the sliding gear judgment result through any one or more of an electric signal, an optical signal or mechanical transmission to carry out sliding gear warning.
Furthermore, the sliding gear judging device can transmit the sliding gear judging result to the electric mechanism through an electric signal, an optical signal or mechanical transmission to carry out sliding gear protection, so that the electric mechanism stops rotating.
In a second aspect, the present application further provides a control method for an on-load tap-changer sliding gear monitoring device, where the device according to the first aspect includes:
step S601, the electric mechanism receives a gear shifting command, and drives the tap changer body to carry out on-load gear shifting operation through the transmission mechanism and the tap changer main shaft;
step S602, in the gear shifting process, the rotary coding mechanism is driven to rotate by the transmission rod coaxial rotating mechanism and the external transmission mechanism;
step S603, the rotation coding mechanism converts the rotation angle or the ring speed into a coding signal and transmits the coding signal to the sliding gear judging device;
and step S604, calculating the rotation angle of the vertical transmission rod in real time by the sliding gear judging device according to the coded signal, judging that the sliding gear of the on-load tap-changer occurs if the rotation angle exceeds the maximum angle value allowed by single gear shifting, and performing sliding gear warning or sliding gear protection after judging that the sliding gear occurs so as to stop the rotation of the electric mechanism.
Compared with the prior art, the invention has the following beneficial effects:
1. the on-load tap-changer sliding gear monitoring device can be used for installing and configuring the on-load tap-changer which is put into operation and has or may have sliding gear faults;
2. the semi-circle clamping type transmission structure is adopted, the installation is convenient, the operation and the use of the original equipment are not influenced, the disassembly and assembly or the transformation of the original system are avoided, and the device is particularly suitable for application scenes needing to additionally install a sliding gear monitoring device in the later period;
3. by installing the on-load tap-changer sliding gear monitoring device, the running reliability and safety of the on-load tap-changer can be improved, and when a sliding gear fault occurs, sliding gear protection can be performed in time, so that the electric mechanism stops rotating, and abnormal gear shifting of the on-load tap-changer is avoided.
Drawings
Fig. 1 is a device for monitoring a sliding gear of an on-load tap-changer according to an embodiment of the present disclosure.
Fig. 2 is a schematic flow chart of a control method of an on-load tap-changer sliding gear monitoring device according to an embodiment of the present application.
Fig. 3 is a schematic view of a semi-circular clamping type gear plate clamped on a vertical transmission rod.
In the figure: 1. an electric mechanism; 2. a transmission mechanism; 2a, a vertical transmission rod; 2b, a first gear mechanism; 2c, a horizontal transmission rod; 2d, a second gear mechanism; 3. a tap changer; 3a, a tap changer body; 3b, a main shaft of the tap changer; 4. a sliding gear monitoring device; 4a, a transmission rod coaxial rotating mechanism; 4b, an external transmission mechanism; 4c, a rotary coding mechanism; 4d, a sliding gear judging device.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present embodiment, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the indicated orientation or positional relationship thereof is based on the orientation or positional relationship shown in the drawings, and is only for convenience of describing the present embodiment and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, cannot be construed as limiting the present embodiment.
The first embodiment is as follows:
fig. 1 is a device for monitoring a sliding gear of an on-load tap-changer according to an embodiment of the present application, and the device includes an electric mechanism 1, a transmission mechanism 2, and a tap-changer 3; the transmission mechanism 2 comprises a vertical transmission rod 2a, a first gear mechanism 2b, a horizontal transmission rod 2c and a second gear mechanism 2d; the tap changer 3 comprises a tap changer body 3a and a tap changer main shaft 3b; the sliding gear monitoring device 4 comprises a transmission rod coaxial rotating mechanism 4a, an external transmission mechanism 4b, a rotating coding mechanism 4c and a sliding gear judging device 4d.
The transmission rod coaxial rotating mechanism 4a is coaxially arranged with the vertical transmission rod 2a, the horizontal transmission rod 2c or the tap changer spindle 3 b. The transmission rod coaxial rotating mechanism 4a is of a semicircular clamping structure, is spliced by two semicircular gear discs, and is fixed on a vertical transmission rod or a horizontal transmission rod or a tap switch main shaft in a two-screw fastening mode.
Optionally, the transmission rod coaxial rotating mechanism 4a may also be a circular ring mechanism sleeved on the vertical transmission rod 2a, the horizontal transmission rod 2c or the tap changer spindle 3b, or one or more circular arc mechanisms assembled on the vertical transmission rod 2a, the horizontal transmission rod 2c or the tap changer spindle 3 b.
The external transmission mechanism 4b is an arc mechanism, such as a rotating disk, and preferably an arc mechanism having the same size and shape as the transmission rod coaxial rotation mechanism 4 a.
The coaxial rotating mechanism 4a and the external transmission mechanism 4b of the transmission rod are gear transmission, worm transmission, belt transmission or chain transmission mechanisms. The transmission ratio can be adjusted according to the design.
The rotary encoder 4c can convert the rotation angle or the rotation speed of the external transmission mechanism 4b into an encoded signal. This part can also be conventional magnetic encoder, photoelectric encoder for self-control coding counting disc, can carry out nimble adaptation according to actual precision, operating mode demand.
The sliding gear judging device 4d can receive the coded signal output by the rotary coding mechanism 4c, convert the coded signal into the rotation angle or the ring speed of the external transmission mechanism 4b, then calculate the rotation angle of the vertical transmission rod 2a in real time according to the rotation angle relation between the external transmission mechanism 4b and the transmission rod coaxial rotation mechanism 4a, judge that the on-load tap-changer has sliding gear if the rotation angle exceeds the maximum angle value allowed by single gear shifting, and after judging that the sliding gear has occurred, give an alarm to the sliding gear or protect the sliding gear, so as to stop the rotation of the electric mechanism.
It should be noted that, when the transmission rod coaxial rotation mechanism 4a is installed on the horizontal transmission rod 2c or the tap changer spindle 3b, the rotation angle of the vertical transmission rod 2a is uniformly converted through the rotation meshing relationship between the first gear mechanism and the second gear mechanism, and the determination is performed.
The slide determination device 4d can perform slide warning on the slide determination result by an electric signal, an optical signal, or mechanical transmission. The sliding gear determination device 4d can transmit the sliding gear determination result to the electric mechanism 1 through an electric signal, an optical signal, or mechanical transmission, and perform sliding gear protection to stop the electric mechanism from rotating.
Fig. 3 is a schematic structural view of a semicircular clamping type gear plate clamped on a vertical transmission rod. The gear plate is formed by splicing two semicircular gear plates and is fixed on the vertical transmission rod 2a in a mode of fastening by two screws. The design avoids the disassembly and assembly or transformation work of the original system, and is particularly suitable for application scenes needing to additionally install the sliding gear monitoring device in the later period.
The second embodiment:
fig. 2 is a schematic flow chart of a control method of an on-load tap-changer sliding gear monitoring device according to an embodiment of the present application, where the method is based on the device according to the first embodiment.
Step S601, the electric mechanism 1 receives a gear shifting command, and drives a tap changer body 3a to carry out on-load gear shifting operation through a transmission mechanism 2 and a tap changer main shaft 3b;
step S602, in the gear shifting process, the rotary coding mechanism 4c is driven to rotate by the transmission rod coaxial rotating mechanism 4a and the external transmission mechanism 4 b;
step S603, the rotation encoding mechanism 4c converts the rotation angle or the ring speed into an encoded signal and transmits the encoded signal to the slide determining device 4d;
step S604, the sliding gear determining device 4d calculates the rotation angle of the vertical transmission rod in real time according to the encoded signal, determines that the on-load tap-changer has a sliding gear if the rotation angle exceeds the maximum angle value allowed for single gear shifting, and performs a sliding gear alarm or sliding gear protection after determining that the sliding gear has occurred, so as to stop the rotation of the electric mechanism.
The gear-slipping judgment device 4d can perform gear-slipping warning on the result of gear-slipping judgment by means of an electric signal, an optical signal, or mechanical transmission. The slide determination device 4d can transmit the slide determination result to the electric mechanism 1 by an electric signal, an optical signal, or mechanical transmission to perform slide protection, thereby stopping the rotation of the electric mechanism 1.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" can explicitly or implicitly include one or more of that feature, and in the description of the invention, "plurality" means two or more unless explicitly specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being capable of being fixedly connected, detachably connected, or integrally connected; can be a mechanical connection, but also an electrical connection; can be directly connected or indirectly connected through intervening media, and can communicate between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
In the description herein, reference to the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the principles and spirit of the present invention.
Claims (9)
1. A sliding gear monitoring device of an on-load tap-changer is arranged on the on-load tap-changer and is characterized in that the on-load tap-changer comprises an electric mechanism (1), a transmission mechanism (2) and a tap-changer (3);
the electric mechanism (1) is connected with the transmission mechanism (2), and the action of the tap changer (3) is controlled through the transmission mechanism (2);
the transmission mechanism (2) comprises a vertical transmission rod (2 a), a first gear mechanism (2 b), a horizontal transmission rod (2 c) and a second gear mechanism (2 d);
the tap changer (3) comprises a tap changer body (3 a) and a tap changer main shaft (3 b);
the sliding gear monitoring device (4) comprises:
coaxial rotating mechanism (4 a) of transfer link: the on-load tap-changer is arranged on the on-load tap-changer and synchronously rotates with the transmission mechanism (2);
external transmission mechanism (4 b): the transmission rod coaxial rotating mechanism (4 a) is in transmission connection and synchronously rotates with the transmission rod coaxial rotating mechanism (4 a);
rotation encoding mechanism (4 c): the device is connected to the external transmission mechanism (4 b) and used for recording the rotation angle or the ring speed of the external transmission mechanism (4 b) and converting the rotation angle or the ring speed into a coded signal;
sliding gear determination device (4 d): and the code signal is connected with the rotary coding mechanism (4 c) and used for receiving the code signal output by the rotary coding mechanism (4 c), judging whether the on-load tap-changer has sliding gear or not according to the code signal, and outputting an alarm signal when judging that the sliding gear occurs.
2. On-load tap changer slip monitoring device according to claim 1, characterized in that the transmission lever coaxial turning mechanism (4 a) is mounted coaxially with a vertical transmission lever (2 a) or a horizontal transmission lever (2 c) or a tap changer spindle (3 b).
3. The on-load tap-changer sliding gear monitoring device according to claim 1, characterized in that the transmission rod coaxial rotating mechanism (4 a) is of a semicircular clamping structure, is spliced by two semicircular gear disks, and is fixed on the vertical transmission rod (2 a) or the horizontal transmission rod (2 c) or the tap-changer spindle (3 b) in a manner of fastening by two screws.
4. The on-load tap-changer sliding gear monitoring device according to claim 1, wherein the transmission connection structure of the transmission rod coaxial rotating mechanism (4 a) and the external transmission mechanism (4 b) comprises: any one of a gear drive, worm drive, belt drive, or chain drive.
5. On-load tap-changer sliding gear monitoring device according to claim 1, characterized by a rotary encoder (4 c) capable of converting the angle of rotation or the ring speed of the drive rod or spindle of the external transmission (4 b) into an encoded signal.
6. The on-load tap-changer sliding gear monitoring device according to claim 1, characterized in that the sliding gear judging device (4 d) is capable of receiving the coded signal outputted by the rotary coding mechanism (4 c), calculating the rotation angle of the vertical transmission rod in real time according to the coded signal, judging that the sliding gear of the on-load tap-changer occurs if the rotation angle exceeds the maximum angle value allowed by single gear shifting, and otherwise, judging that the sliding gear does not occur.
7. The on-load tap-changer slip monitoring device according to claim 1, characterized in that the method of outputting an alarm signal by the slip determination means (4 d) comprises: and outputting the sliding gear judgment result through any one or more of an electric signal, an optical signal or mechanical transmission to carry out sliding gear warning.
8. On-load tap-changer slip monitoring device according to claim 1, characterized in that the slip determination means (4 d) is capable of transmitting the slip determination result to the electric mechanism (1) via an electrical signal, an optical signal or a mechanical transmission for slip protection and stopping the electric mechanism (1).
9. A method for controlling an on-load tap-changer sliding gear monitoring device, wherein the device is based on any one of claims 1-8, and comprises the following steps:
the electric mechanism (1) receives a gear shifting command, and drives the tap changer body (3 a) to carry out on-load gear shifting operation through the transmission mechanism (2) and the tap changer main shaft (3 b);
in the gear shifting process, the rotary coding mechanism (4 c) is driven to rotate by the transmission rod coaxial rotating mechanism (4 a) and the external transmission mechanism (4 b);
the rotation coding mechanism (4 c) converts the rotation angle or the ring speed into a coding signal and transmits the coding signal to the sliding gear judging device (4 d);
and the sliding gear judgment device (4 d) calculates the rotation angle of the vertical transmission rod in real time according to the coded signal of the rotation angle or the ring speed, judges that the on-load tap-changer has sliding gear to judge if the rotation angle exceeds the maximum angle value allowed by single gear shifting, and gives a sliding gear alarm or protects the sliding gear to stop the electric mechanism (1) from rotating after judging that the sliding gear has occurred.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210807670.9A CN115343607A (en) | 2022-07-11 | 2022-07-11 | On-load tap-changer sliding gear monitoring device and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210807670.9A CN115343607A (en) | 2022-07-11 | 2022-07-11 | On-load tap-changer sliding gear monitoring device and control method |
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| Publication Number | Publication Date |
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| CN115343607A true CN115343607A (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210807670.9A Pending CN115343607A (en) | 2022-07-11 | 2022-07-11 | On-load tap-changer sliding gear monitoring device and control method |
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| CN (1) | CN115343607A (en) |
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- 2022-07-11 CN CN202210807670.9A patent/CN115343607A/en active Pending
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