CN211478607U

CN211478607U - Winding intertwist short circuit simulation observation device

Info

Publication number: CN211478607U
Application number: CN201922296444.5U
Authority: CN
Inventors: 陈梁远; 黎大健; 赵坚; 余长厅; 张玉波; 张磊; 颜海俊; 焦健
Original assignee: Electric Power Research Institute of Guangxi Power Grid Co Ltd
Current assignee: Electric Power Research Institute of Guangxi Power Grid Co Ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-09-11
Anticipated expiration: 2029-12-19

Abstract

The utility model relates to a winding intertwist short circuit simulation observation device, which comprises a variable frequency power supply, a plurality of wires, a closed iron core, an infrared camera and a gaussmeter; the multi-strand wire is the flat enameled copper wire of stranded duplex winding and keeps the determining deviation to be the heliciform winding on closed iron core, and variable frequency power supply is connected with the both ends of multi-strand wire, and the multi-strand wire adopts white strap winding and has several sections to expose in the outside and not coat insulating varnish and white strap, and infrared camera is relative with the multi-strand wire, and the gauss meter is used for detecting the magnetic leakage field. The utility model is provided with a plurality of wires and a closed iron core, and actually simulates windings such as a transformer, a reactor and the like; the variable frequency power supply is arranged, so that the skin effect is simulated under high frequency and low current; the infrared camera and the gaussmeter are arranged, so that the use of various observation means is realized. The utility model discloses directly perceived, easy operation can survey the short-circuit process effectively between the winding thigh, provides help for carrying out the research of short circuit between the thigh.

Description

Winding intertwist short circuit simulation observation device

Technical Field

The utility model relates to an electric power detects technical field, especially relates to a short circuit simulation observation device between winding strand.

Background

For transformer coils using multiple strands of wire wound in parallel, damage to the insulation between strands often occurs resulting in short circuiting between strands. The formation of the short circuit between the strands is: during the coil overhaul during manufacturing or replacement, the phenomenon of copper exposure is caused by uneven wrapping of the outer insulating layer of the lead due to poor quality of the lead; turn-to-turn insulation is damaged due to bending and burrs in winding; during operation, the wire is twisted due to over-tight wire clamping or improper transposition, so that the original defects of the wire are further enlarged, and particularly, insulation among parallel wires is easy to break through coil press mounting, so that short circuit among the wires is caused; short circuit is temporarily not formed in the press mounting, and the short circuit between strands is caused by poor quality of the lead and improper construction under the impact of overload current or the influence of other winding faults in operation. Currently, the short circuit between strands is less researched, and mainly a device or a model for simulation observation is lacked.

SUMMERY OF THE UTILITY MODEL

Not enough more than, the utility model provides a short circuit simulation observation device between winding strand can realize that short circuit simulation is surveyd between winding strand.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a winding intertwist short circuit simulation observation device comprises a variable frequency power supply, a multistrand wire, a closed iron core, an infrared camera and a gaussmeter; the multi-strand wire is a multi-strand parallel-wound flat enameled copper wire and is spirally wound on the closed iron core at a certain interval, the variable frequency power supply is connected with two ends of the multi-strand wire, the multi-strand wire wound on the closed iron core is wound by a white cloth tape, a plurality of sections of exposed and uncoated insulating paint and white cloth tapes are arranged on the outer side of the multi-strand wire, the infrared camera is opposite to the multi-strand wire, and the gaussmeter is used for detecting a leakage magnetic field.

Furthermore, the frequency of the variable frequency power supply is 15-1000 Hz, and the variable frequency power supply provides high-frequency heavy current.

Furthermore, the closed iron core is made of silicon steel sheets, and eddy current loss can be effectively reduced through the silicon steel sheets.

The utility model has the advantages that:

1. the multi-strand wire and the closed iron core are arranged, and windings such as a transformer, a reactor and the like are simulated actually;

2. by arranging the variable frequency power supply, the skin effect is simulated under high frequency and low current;

3. the infrared camera and the gaussmeter are arranged, so that the use of various observation means is realized;

4. the utility model discloses directly perceived, easy operation can survey the short-circuit process effectively between the winding thigh, provides help for carrying out the research of short circuit between the thigh.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic (partial) view of an embodiment of the present invention.

Wherein the labels shown in the figures are: 1: variable frequency power supply, 2: multi-strand wire, 3: closed core, 4: infrared camera, 5: gauss meter, 6: white cloth tape, 7: a copper sheet.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, the utility model provides a short circuit simulation observation device between winding strands mainly includes variable frequency power supply 1, stranded wire 2, closed iron core 3, infrared camera 4 and gauss meter 5. The frequency of the variable frequency power supply 1 is 15-1000 Hz, preferably, the model of the variable frequency power supply is AFV-P-5000, the power output of 5000VA, and the frequency is 15-1000 Hz. Stranded wire 2 is the flat enameled copper wire of stranded duplex winding and keeps the determining deviation and be the heliciform winding on closed iron core 3, and variable frequency power supply 1 is connected with the both ends of stranded wire 2, and the stranded wire 2 of winding on closed iron core 3 adopts the white strap winding and has several sections to expose in the outside and not apply insulating varnish and white strap 6. The closed iron core 3 is made of silicon steel sheets, and the infrared camera 4 is opposite to the multi-strand wires 2. The gaussmeter 5 is used for detecting the leakage magnetic field, and preferably, the infrared camera 4 is a feverfew FLIR T450sc portable thermal imager, and the gaussmeter 5 is a DP-T10B handheld digital gaussmeter.

During the use, please refer to fig. 2, the copper sheet 7 is adopted to carry out the short circuit between the strands in the place that a certain section of the stranded conductor 2 is exposed and not coated with the insulating paint and the white strap, one or more short circuits can be carried out, the other sections are all insulated by adopting the insulating board, the power supply of the variable frequency power supply 1 is switched on, the current and/or the frequency are adjusted, simultaneously, the infrared camera 4 is adopted to shoot, the gauss meter 5 is utilized to carry out the check of the stranded conductor 2, the heating condition of the short circuit can be observed through the infrared camera 4, and the magnetic field distortion condition can be observed through the gauss. The utility model discloses directly perceived, easy operation can survey the short-circuit process effectively between the winding thigh, provides help for carrying out the research of short circuit between the thigh.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a short circuit simulation observation device between winding thigh which characterized in that: comprises a variable frequency power supply (1), a plurality of strands of wires (2), a closed iron core (3), an infrared camera (4) and a gaussmeter (5); stranded wire (2) are the flat enameled copper line of stranded duplex winding and keep a determining deviation and be the heliciform winding on closed iron core (3), variable frequency power supply (1) with the both ends of stranded wire (2) are connected, twine in closed iron core (3) stranded wire (2) adopt the winding of white strap and have several sections to expose in the outside and not coat insulating varnish and white strap, infrared camera (4) with stranded wire (2) are relative, gauss meter (5) are used for detecting the magnetic leakage field.

2. The winding intertwist short circuit simulation observation device according to claim 1, wherein: the frequency of the variable frequency power supply (1) is 15-1000 Hz.

3. The winding intertwist short circuit simulation observation device according to claim 1, wherein: the closed iron core (3) is made of silicon steel sheets.