CN109616343B - Tap switch gear display device and method for distribution transformer - Google Patents

Tap switch gear display device and method for distribution transformer Download PDF

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Publication number
CN109616343B
CN109616343B CN201811571037.4A CN201811571037A CN109616343B CN 109616343 B CN109616343 B CN 109616343B CN 201811571037 A CN201811571037 A CN 201811571037A CN 109616343 B CN109616343 B CN 109616343B
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China
Prior art keywords
gear
tap
information
adjusting handle
distribution transformer
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CN109616343A (en
Inventor
徐肖伟
王科
刘红文
项恩新
张文斌
田小航
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Electric Power Research Institute of Yunnan Power System Ltd
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Electric Power Research Institute of Yunnan Power System Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005Tap change devices
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • H01F29/04Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/16Indicators for switching condition, e.g. "on" or "off"
    • H01H9/167Circuits for remote indication

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

The application discloses tapping switch gear display device and method of distribution transformer, wherein, tapping switch gear display device includes: the system comprises a tap switch, a sealing hole, a gear adjusting handle, a rain-proof cap, a gear information conversion device, a signal line, a metering automation terminal and a server; the tap switch is connected with the distribution transformer through the sealing hole, the gear adjusting handle is connected to the tap switch, and the rain-proof cap covers the tap switch, the gear adjusting handle and the gear information conversion device; the gear information conversion device converts the gear adjusted by the gear adjusting handle into gear information in the form of an electric signal; the signal wire transmits the gear information in the form of an electric signal to the metering automation terminal; the metering automation terminal converts the gear information in the form of an electric signal into gear information in the form of a digital signal and transmits the gear information to the server; the server stores and displays the gear information in the form of digital signals. By adopting the device and the method, the workload of operation and maintenance personnel is reduced, and the power supply reliability is improved.

Description

Tap switch gear display device and method for distribution transformer
Technical Field
The application relates to the technical field of distribution transformer operation maintenance, in particular to a tap changer gear display device and method of a distribution transformer.
Background
A distribution transformer is an electric power device for transmitting electric energy, and functions to convert ac electric energy of a certain level of voltage and current into ac electric energy of another level of voltage and current of the same frequency. Whether the operation of the distribution transformer is safe and stable is directly related to whether the distribution network can safely and stably operate or not, and further the power supply reliability of the distribution network is related.
The tap changer of the distribution transformer is an important component of the distribution transformer, and the tap changer is used for adjusting the voltage transformation ratio of the distribution transformer. For example, when the voltage is too low or too high, the voltage is adjusted to be within a reasonable range by adjusting the gear of the tap changer so as to ensure the power quality and the power supply reliability of the power supply of the distribution transformer. In order to provide a data reference for the voltage regulation of a distribution transformer, the gears of a tap changer of the distribution transformer are verified each year, and the gears of the tap changer are checked by a gear display device.
However, the tap changer gear position display is arranged on the tap changer or the distribution transformer. Therefore, to verify the tap position of a distribution transformer, maintenance personnel must go to the location of the distribution transformer to check the tap position, which adds more work to the maintenance personnel. In addition, the gear position display device of the tap changer is sealed in the rain hat, and the gear position of the tap changer cannot be seen from the appearance. Therefore, a power outage must be performed to verify the tap changer gear, thereby reducing the power reliability of the distribution grid.
Disclosure of Invention
The tap changer gear display device and method of the distribution transformer provided by the embodiment of the application aim to solve the problems that in the prior art, when the tap changer gear of one distribution transformer is verified, the workload of operation and maintenance personnel is increased and the power supply reliability of a distribution network is reduced.
In a first aspect, an embodiment of the present application provides a tap changer gear display device of a distribution transformer, tap changer gear display device sets up on distribution transformer shell oil tank cover, tap changer gear display device includes:
the system comprises a tap switch, a sealing hole, a gear adjusting handle, a rain-proof cap, a gear information conversion device, a signal line, a metering automation terminal and a server;
the tap switch is connected with a distribution transformer through the sealing hole, wherein the sealing hole is formed in an oil tank cover of a shell of the distribution transformer;
the gear adjusting handle is fixedly connected to the tap switch and used for driving the tap switch to realize gear adjustment of the distribution transformer;
the gear shift adjusting handle is used for adjusting the gear shift of the gear shift adjusting handle;
the gear information conversion device is arranged between the tap switch and the gear adjusting handle and is used for converting the gear adjusted by the gear adjusting handle into gear information in an electric signal form;
the signal wire is connected with the gear information conversion device and the metering automatic terminal, and the gear information in the form of the electric signal converted by the gear information conversion device is transmitted to the metering automatic terminal by the signal wire;
the metering automation terminal is connected with the server and is used for converting the gear information in the form of the electric signal transmitted by the signal wire into gear information in the form of a digital signal and transmitting the gear information in the form of the digital signal to the server;
the server is used for storing and displaying the gear information in the form of digital signals transmitted by the metering automation terminal.
With reference to the first aspect, in one implementation manner, the gear information conversion device includes:
the device comprises a metal rod, a spring, a protruding node, an insulating base and a plurality of electrical nodes, wherein different electrical nodes correspond to different gears respectively;
the metal rod is vertically welded on the gear adjusting handle and is of a hollow structure, a spring is arranged in the metal rod, the protruding node is arranged at the lower end of the metal rod, and the spring is connected with the protruding node and the gear adjusting handle;
the insulating base is arranged on the tap switch, the electrical node is etched on the insulating base, and the insulating base is used for insulating the electrical node from a distribution transformer oil tank;
when the gear is adjusted by the gear adjusting handle, the gear adjusting handle drives the metal rod to move, so that the protruding node is connected with the electrical node corresponding to the target gear, the protruding node and the electrical node form a loop, the loop forms gear information of an electrical signal form corresponding to the target gear, and the gear information of the electrical signal form is transmitted to the metering automation terminal.
With reference to the first aspect, in one implementation manner, the tap switch is connected to a high-voltage winding connector of the distribution transformer, and when a gear needs to be adjusted, the tap switch adjusts the gear by adjusting the number of turns of the high-voltage winding.
With reference to the first aspect, in one implementation manner, the server is disposed in a power supply monitoring center.
With reference to the first aspect, in an implementation manner, the metering automation terminal transmits the gear information to the server through a wireless transmission manner.
With reference to the first aspect, in one implementation, the electrical node includes:
a gear node and a common node;
the number of the gear nodes is determined according to the specific gear number, and the number of the common nodes is one.
With reference to the first aspect, in one implementation manner, the insulating base is a PCB insulating plate or a plate covered with an insulating film.
In a second aspect, an embodiment of the present application provides a tap-changer gear position display method for a distribution transformer, where the tap-changer gear position display method is applied to the tap-changer gear position display device of any one of the first aspect, and the tap-changer gear position display method includes:
a gear adjusting handle in the tap switch gear display device drives the tap switch to realize gear adjustment of the distribution transformer;
a gear information conversion device in the tap changer gear display device converts the gear adjusted by the gear adjusting handle into gear information in the form of an electric signal;
a signal wire in the tap changer gear display device transmits the gear information in the form of the electric signal converted by the gear information conversion device to a metering automation terminal;
the metering automation terminal converts the gear information in the form of the electric signal transmitted by the signal wire into gear information in the form of a digital signal and transmits the gear information in the form of the digital signal to a server;
the server is used for storing and displaying the gear information in the form of digital signals transmitted by the metering automation terminal.
With reference to the second aspect, in one implementation manner, the step information converting device in the tap changer step display device converts the step adjusted by the step adjustment handle into step information in the form of an electric signal, and the step information converting device includes:
the gear adjusting handle drives the metal rod to move, so that the protruding node is connected with the electrical node corresponding to the target gear, the protruding node and the electrical node form a loop, the loop forms gear information in an electric signal form corresponding to the target gear, and the gear information in the electric signal form is transmitted to the metering automation terminal.
With reference to the second aspect, in one implementation manner, the metering automation terminal transmits the gear information of the digital signal to the server by a wireless transmission manner.
The tap changer gear display device and method of the distribution transformer provided by the embodiment of the application, wherein the tap changer gear display device comprises: the system comprises a tap switch, a sealing hole, a gear adjusting handle, a rain-proof cap, a gear information conversion device, a signal line, a metering automation terminal and a server; the tap switch is connected with a distribution transformer through the sealing hole, the gear adjusting handle is fixedly connected to the tap switch and used for driving the tap switch to realize gear adjustment of the distribution transformer; the gear shift adjusting handle is used for adjusting the gear shift of the gear shift adjusting handle; the gear information conversion device is connected with the tap switch and the gear adjusting handle and is used for converting the gear adjusted by the gear adjusting handle into gear information in an electric signal form; the signal wire is connected with the gear information conversion device and the metering automatic terminal, and the gear information in the form of the electric signal converted by the gear information conversion device is transmitted to the metering automatic terminal by the signal wire; the metering automation terminal is connected with the server, converts the gear information in the form of the electric signal transmitted by the signal wire into gear information in the form of a digital signal and transmits the gear information in the form of the digital signal to the server; the server is used for storing and displaying the gear information in the form of digital signals transmitted by the metering automation terminal.
Through the tapping switch gear display device and the method for the distribution transformer, when the gear of the distribution transformer is verified, the position of the distribution transformer does not need to be checked, the power failure of the distribution transformer does not need to be checked, the workload of operation and maintenance personnel is reduced, and the power supply reliability is improved.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a tap changer gear position display device of a distribution transformer according to an embodiment of the present application;
fig. 2 is a top view of a tap changer step indicator of a distribution transformer according to an embodiment of the present disclosure;
fig. 3 is a schematic flow chart illustrating a tap changer gear position displaying method of a distribution transformer according to an embodiment of the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.
The tap changer gear display device of distribution transformer that this application embodiment provided to solve prior art, when verifying the tap changer's of a distribution transformer gear, and the increase that leads to fortune dimension personnel's work load and the problem that reduces the power supply reliability of distribution network.
Referring to fig. 1 and 2, a tap changer gear display of a distribution transformer is shown disposed on a distribution transformer housing tank cover, the tap changer gear display comprising:
the automatic metering device comprises a tap switch 101, a sealing hole 102, a gear adjusting handle 103, a rain-proof cap 104, a gear information conversion device 105, a signal line 106, a metering automation terminal 107 and a server 108;
the tap changer 101 is connected with a distribution transformer through the sealing hole 102, wherein the sealing hole 102 is arranged on the oil tank cover of the shell of the distribution transformer;
the gear adjusting handle 103 is fixedly connected to the tap switch 101, and the gear adjusting handle 103 is used for driving the tap switch 101 to realize gear adjustment of the distribution transformer;
the disassembly switch is divided into two parts by the sealing hole 102, one part is arranged on the inner side of the oil tank of the distribution transformer, the other part is arranged on the outer side and can also be called as an air side, the air side is connected with a gear adjusting handle 103, and the gear adjusting handle 103 is used for driving the tap switch 101 so as to realize gear adjustment of the distribution transformer.
The tap changer 101 is generally provided with 3 gears or 5 gears according to the needs of the distribution transformer, and the present application is not limited specifically.
The rain hat 104 is a stainless steel rain hat and is used for covering the tap switch 101, the gear adjusting handle 103 and the gear information conversion device 105;
wherein, the rain-proof cap 104 covers tap switch 101 and gear adjustment handle 103 on the tap switch 101 during the effect, prevents that tap switch 101 and gear adjustment handle 103 from receiving the infringement of rainwater, also prevents simultaneously that the rainwater from getting into distribution transformer's inside through sealed hole 102, causes distribution transformer short circuit or damage.
The gear information conversion device 105 is arranged between the tap changer 101 and the gear adjusting handle 103, and the gear information conversion device 105 is used for converting the gear adjusted by the gear adjusting handle 103 into gear information in the form of an electric signal;
gear information conversion device 105 is connected with decomposition switch and gear adjusting handle 103, and when gear adjusting handle 103 drives tap switch 101 adjusts the gear, the gear that can adjust tap switch 101 through gear conversion device converts the gear of tapping switch 101 into the gear information of signal of telecommunication form to convenient transmission.
The signal line 106 is connected with the gear information conversion device 105 and the metering automation terminal 107, and the signal line 106 transmits the gear information in the form of an electric signal converted by the gear information conversion device 105 to the metering automation terminal 107;
the signal line 106 is disposed between the gear shift position information conversion device 105 and the metering automation terminal 107, and the signal line 106 functions as a transmission line, that is, the signal line 106 transmits the gear shift position information converted by the gear shift position information conversion device 105 in the form of an electric signal to the metering automation terminal 107.
The metering automation terminal 107 is connected to the server 108, and the metering automation terminal 107 is configured to convert the gear information in the form of the electrical signal transmitted by the signal line 106 into gear information in the form of a digital signal, and transmit the gear information in the form of the digital signal to the server 108;
the metering automation terminal 107 is disposed at a suitable position beside the distribution transformer, and the distance is determined according to the length of the signal line 106, and is not particularly limited.
In addition, the metering automation terminal 107 functions as a conversion function and a transmission function, that is, the gear information in the form of an electric signal transmitted by the signal line 106 is converted into gear information in the form of a digital signal and transmitted to the server 108. The transmission is performed by using a wireless transmission technology, such as GPRS wireless transmission, and the application is not limited in particular.
The server 108 is used for storing and displaying the gear information in the form of digital signals transmitted by the metering automation terminal 107.
The server 108 platform software can realize functions of real-time display and query of gear information.
In addition, the server 108 may utilize a human-computer interaction interface to implement functions of real-time display of data of the gear information, historical data query, creation of a data report, and the like.
The tap changer 101 gear display device of distribution transformer that this application embodiment provided includes: the automatic metering device comprises a tap switch 101, a sealing hole 102, a gear adjusting handle 103, a rain-proof cap 104, a gear information conversion device 105, a signal line 106, a metering automation terminal 107 and a server 108; the tap switch 101 is connected with a distribution transformer through the sealing hole 102, the gear adjusting handle 103 is fixedly connected to the tap switch 101, and the gear adjusting handle 103 is used for driving the tap switch 101 to realize gear adjustment of the distribution transformer; the rain hat 104 is a stainless steel rain hat and is used for covering the tap switch 101, the gear adjusting handle 103 and the gear information conversion device 105; the gear information conversion device 105 is connected with the tap switch 101 and the gear adjusting handle 103 and is used for converting the gear adjusted by the gear adjusting handle 103 into gear information in the form of an electric signal; the signal line 106 is connected with the gear information conversion device 105 and the metering automation terminal 107, and the signal line 106 transmits the gear information in the form of an electric signal converted by the gear information conversion device 105 to the metering automation terminal 107; the metering automation terminal 107 is connected with the server 108, the metering automation terminal 107 converts the gear information in the form of the electric signal transmitted by the signal line 106 into gear information in the form of a digital signal, and transmits the gear information in the form of the digital signal to the server 108; the server 108 is used for storing and displaying the gear information in the form of digital signals transmitted by the metering automation terminal 107.
Through the application of the tap changer 101 gear display device of the distribution transformer, when the gear of the distribution transformer is verified, the position of the distribution transformer is not required to be checked, the power failure of the distribution transformer is not required to be checked, the workload of operation and maintenance personnel is reduced, and the power supply reliability is improved.
Further, the gear information conversion means 105 includes:
metal rod 1051, spring 1052, protruding node 1053, insulating base 1054, and a plurality of electrical nodes 1055, different electrical nodes 1055 corresponding to different gears, respectively;
the number of the electrical nodes 1055 is determined according to the gear number of the tap changer 101, and if the tap changer 101 has 3 gears, the number of the nodes is 4; if the tap changer 101 has 5 gear positions, the number of nodes is 6, of which 1 is the common node "0". Electrical nodes 1055 are isolated from each other, as are electrical nodes 1055 and tap changer 101.
The metal rod 1051 is vertically welded on the shift position adjusting handle 103, the metal rod 1051 is a hollow structure, a spring 1052 is arranged inside the metal rod 1051, the protruding node 1053 is arranged at the lower end of the metal rod 1051, and the spring 1052 connects the protruding node 1053 and the shift position adjusting handle 103;
wherein the spring 1052 acts to enhance the reliable contact of the protruding node 1053 to the lower electrical node 1055.
The insulating base 1054 is disposed on the tap switch 101, the electrical node 1055 is etched on the insulating base 1054, and the insulating base 1054 is configured to insulate the electrical node 1055 from a distribution transformer tank;
since the tank of the distribution transformer is a metal tank, the electrical node 1055 must be insulated from the metal tank so that the electrical node 1055 and the protruding node 1053 corresponding to the gear position form a loop of gear position information.
When the gear position adjusting handle 103 adjusts the gear position, the gear position adjusting handle 103 drives the metal rod 1051 to move, so that the protruding node 1053 is connected with the electric node 1055 corresponding to the target gear position, the protruding node 1053 and the electric node 1055 form a loop, and the loop forms gear position information in the form of an electric signal corresponding to the target gear position and transmits the gear position information in the form of the electric signal to the metering automation terminal 107.
For example, when the shift position adjusting handle 103 adjusts the shift position to the "ii" position, the electrical node 1055 "2" corresponding to the "ii" position is connected to the protruding node 1053 to form a loop, which is the shift position information in the form of an electrical signal corresponding to the "ii" position.
Further, the tap switch 101 is connected to a high-voltage winding connector of the distribution transformer, and when a gear needs to be adjusted, the tap switch 101 adjusts the gear by adjusting the number of turns of the high-voltage winding.
The tap changer 101 is divided into an on-load tap changer and an off-load tap changer, wherein the on-load tap changer is mainly used in a main transformer in a transformer substation, and the off-load tap changer is mainly used in a 10kV power distribution network system. In the case of a 10kV distribution network, the tap changer 101 in this embodiment is a tap for connecting a 10kV high voltage winding inside the tank cap. The tap changer 101 is used for adjusting the number of turns of the high-voltage winding to achieve the purpose of adjusting voltage, so that gear adjustment is achieved.
Further, the server 108 is disposed in a power supply monitoring center.
In this embodiment, the server 108 is disposed in a power supply monitoring center, so as to conveniently monitor the gears transmitted by the metering automation terminal 107 in real time, and if abnormality occurs, the gears can be processed in time.
Preferably, the metering automation terminal 107 transmits the gear information to the server 108 by wireless transmission.
Further, the electrical node 1055 includes:
a gear node and a common node;
the number of the gear nodes is determined according to the specific gear number, and the number of the common nodes is one.
When the gear is adjusted, the gear node corresponding to the target gear and the common node are connected, so that the salient node 1053, the gear node and the common node form a loop.
Preferably, the insulating base 1054 is a PCB insulating plate or a plate covered with an insulating film.
Referring to fig. 3, there is shown a tap changer gear display method of a distribution transformer, the tap changer gear display method being applied to the tap changer gear display apparatus, the tap changer gear display method comprising the steps of:
301, driving a tap switch by a gear adjusting handle in the tap switch gear display device to realize gear adjustment of a distribution transformer;
step 302, a gear information conversion device in the tap changer gear display device converts the gear adjusted by the gear adjusting handle into gear information in the form of an electric signal;
step 303, a signal line in the tap changer gear display device transmits the gear information in the form of the electric signal converted by the gear information conversion device to a metering automation terminal;
step 304, the metering automation terminal converts the gear information in the form of the electric signal transmitted by the signal line into gear information in the form of a digital signal and transmits the gear information in the form of the digital signal to a server;
and 305, the server is used for storing and displaying the gear information in the form of digital signals transmitted by the metering automation terminal.
Further, a gear information conversion device in the tap changer gear display device converts the gear adjusted by the gear adjustment handle into gear information in the form of an electric signal, and the gear information conversion device comprises:
the gear adjusting handle drives the metal rod to move, so that the protruding node is connected with the electrical node corresponding to the target gear, the protruding node and the electrical node form a loop, the loop forms gear information in an electric signal form corresponding to the target gear, and the gear information in the electric signal form is transmitted to the metering automation terminal.
Preferably, the metering automation terminal transmits the gear information of the digital signal to the server in a wireless transmission mode.
The same and similar parts in the various embodiments in this specification may be referred to each other. In particular, as for the method embodiment, since it is substantially similar to the apparatus embodiment, the description is simple, and the relevant points can be referred to the description in the apparatus embodiment.
The present application has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to limit the application. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the presently disclosed embodiments and implementations thereof without departing from the spirit and scope of the present disclosure, and these fall within the scope of the present disclosure. The protection scope of this application is subject to the appended claims.

Claims (9)

1. The utility model provides a tap changer gear display device of distribution transformer which characterized in that, tap changer gear display device sets up on distribution transformer shell oil tank cover, includes:
the system comprises a tap switch, a sealing hole, a gear adjusting handle, a rain-proof cap, a gear information conversion device, a signal line, a metering automation terminal and a server;
the tap switch is connected with a distribution transformer through the sealing hole, wherein the sealing hole is formed in an oil tank cover of a shell of the distribution transformer;
the gear adjusting handle is fixedly connected to the tap switch and used for driving the tap switch to realize gear adjustment of the distribution transformer;
the gear shift adjusting handle is used for adjusting the gear shift of the gear shift adjusting handle;
the gear information conversion device is arranged between the tap switch and the gear adjusting handle and is used for converting the gear adjusted by the gear adjusting handle into gear information in an electric signal form;
the signal wire is connected with the gear information conversion device and the metering automatic terminal, and the gear information in the form of the electric signal converted by the gear information conversion device is transmitted to the metering automatic terminal by the signal wire;
the metering automation terminal is connected with the server and is used for converting the gear information in the form of the electric signal transmitted by the signal wire into gear information in the form of a digital signal and transmitting the gear information in the form of the digital signal to the server;
the server is used for storing and displaying gear information in a digital signal form transmitted by the metering automation terminal;
wherein the gear information conversion apparatus includes:
the device comprises a metal rod, a spring, a protruding node, an insulating base and a plurality of electrical nodes, wherein different electrical nodes correspond to different gears respectively;
the metal rod is vertically welded on the gear adjusting handle and is of a hollow structure, a spring is arranged in the metal rod, the protruding node is arranged at the lower end of the metal rod, and the spring is connected with the protruding node and the gear adjusting handle;
the insulating base is arranged on the tap switch, the electrical node is etched on the insulating base, and the insulating base is used for insulating the electrical node from a distribution transformer oil tank;
when the gear is adjusted by the gear adjusting handle, the gear adjusting handle drives the metal rod to move, so that the protruding node is connected with the electrical node corresponding to the target gear, the protruding node and the electrical node form a loop, the loop forms gear information of an electrical signal form corresponding to the target gear, and the gear information of the electrical signal form is transmitted to the metering automation terminal.
2. Tap changer gear indication device according to claim 1,
the tap switch is connected with a high-voltage winding connector of the distribution transformer, and when the gear needs to be adjusted, the tap switch realizes gear adjustment by adjusting the number of turns of the high-voltage winding.
3. Tap changer gear indication device according to claim 1,
the server is arranged in the power supply monitoring center.
4. Tap changer gear indication device according to claim 1,
and the metering automation terminal transmits the gear information to the server in a wireless transmission mode.
5. The tap changer gear indication device of claim 1, wherein the electrical node comprises:
a gear node and a common node;
the number of the gear nodes is determined according to the specific gear number, and the number of the common nodes is one.
6. Tap changer gear indication device according to claim 1,
the insulating base is a plate covered with an insulating film.
7. A tap-changer gear-position display method of a distribution transformer, characterized in that the tap-changer gear-position display method is applied to the tap-changer gear-position display device of any one of claims 1 to 6, the tap-changer gear-position display method comprising:
a gear adjusting handle in the tap switch gear display device drives the tap switch to realize gear adjustment of the distribution transformer;
a gear information conversion device in the tap changer gear display device converts the gear adjusted by the gear adjusting handle into gear information in the form of an electric signal;
a signal wire in the tap changer gear display device transmits the gear information in the form of the electric signal converted by the gear information conversion device to a metering automation terminal;
the metering automation terminal converts the gear information in the form of the electric signal transmitted by the signal wire into gear information in the form of a digital signal and transmits the gear information in the form of the digital signal to a server;
the server is used for storing and displaying the gear information in the form of digital signals transmitted by the metering automation terminal.
8. The tap changer gear display method of claim 7, wherein the step information conversion device in the tap changer gear display device converting the adjusted gear of the gear adjustment handle into the gear information in the form of an electrical signal comprises:
the gear adjusting handle drives the metal rod to move, so that the protruding node is connected with the electrical node corresponding to the target gear, the protruding node and the electrical node form a loop, the loop forms gear information in an electric signal form corresponding to the target gear, and the gear information in the electric signal form is transmitted to the metering automation terminal.
9. Tap changer gear indication method according to claim 7,
and the metering automation terminal transmits the gear information of the digital signal to the server in a wireless transmission mode.
CN201811571037.4A 2018-12-21 2018-12-21 Tap switch gear display device and method for distribution transformer Active CN109616343B (en)

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