CN-120669024-B - Transformer defect simulation test device

CN120669024BCN 120669024 BCN120669024 BCN 120669024BCN-120669024-B

Abstract

The invention belongs to the technical field of electric appliances and provides a transformer defect simulation test device which comprises an isolation barrel, wiring contacts and a short-circuit defect simulation assembly, wherein the isolation barrel is suitable for being arranged on a transformer, the lower end of the isolation barrel stretches into the transformer, insulating oil is contained in the isolation barrel, the internal space of the isolation barrel and the internal space of the transformer are isolated from each other, the wiring contacts are arranged on the isolation barrel at intervals and connected with the isolation barrel and penetrate through the isolation barrel, the wiring contacts are arranged at one end of the outer side of the isolation barrel and are used for conducting connection with windings of the transformer through wires, the wiring contacts are provided with at least two and are respectively electrically connected with different windings of the transformer, the short-circuit defect simulation assembly is arranged in the isolation barrel, and the short-circuit defect simulation assembly is connected with one end of the wiring contacts arranged in the isolation barrel through wires so as to enable the two windings to be short-circuited. The transformer defect simulation test device provided by the invention is more convenient to assemble and disassemble.

Inventors

CHENG JUNWEI
YANG BIN
HAN KAI
YAN SHIYONG
WANG XINBING
GUO PENGHONG
XU FUQIANG
YANG HONGYAN
WANG MINGSHENG
KONG DEJING
LI FAYONG
YE ZEKANG

Assignees

山东电力设备有限公司
中国电气装备集团有限公司

Dates

Publication Date: 20260512
Application Date: 20250616

Claims (8)

1. A transformer defect simulation test device, comprising: The isolation barrel (10) is suitable for being arranged on a transformer, the lower end of the isolation barrel extends into the transformer, insulating oil is contained in the isolation barrel (10), and the internal space of the isolation barrel (10) is isolated from the internal space of the transformer; The wiring contacts (11) are arranged on the isolation barrel (10) at intervals, are connected with the isolation barrel (10) and penetrate through the isolation barrel (10), and the wiring contacts (11) are arranged at one end of the outer side of the isolation barrel (10) and are used for conducting connection with windings of the transformer through wires; the short-circuit defect simulation assembly is arranged in the isolation barrel (10), and is connected with one end of the wiring contact (11) arranged in the isolation barrel (10) through a wire so as to enable the two windings to be short-circuited; the short circuit defect simulation assembly includes: a first insulating pipe (20) having an upper end penetrating the top of the isolation barrel (10); an electricity taking assembly connected with the lower end of the first insulating tube (20), the electricity taking assembly having a first conductive module and a second conductive module insulated from each other, the first conductive module being electrically connected with one of the wiring contacts (11) through a wire, the second conductive module being electrically connected with the other of the wiring contacts (11) through a wire, and The short-circuit discharging assembly is in conductive contact with or separated from the first conductive module and the second conductive module through movement, and when the short-circuit discharging assembly is moved to a first position, the first conductive module and the second conductive module are in conductive contact with each other; The first conductive module comprises an electricity taking ring (31), wherein the electricity taking ring (31) is coaxially connected to the lower end of the first insulating tube (20), and the electricity taking ring (31) is electrically connected with one wiring contact (11) through a wire; The second conductive module comprises a conductive head (35), and the conductive head (35) is communicated with the other wiring contact (11) through a wire; The power taking assembly further comprises a second insulating tube (33), the second insulating tube (33) is arranged between the power taking ring (31) and the conductive head (35), and two ends of the second insulating tube are respectively connected with the power taking ring (31) and the conductive head (35); The short-circuit discharging assembly is arranged in the electricity taking ring (31) and the second insulating tube (33) in a penetrating mode and is in sliding fit with the electricity taking ring (31) along the axial direction; when the short-circuit discharging assembly moves downwards to the first position, the short-circuit discharging assembly is electrically connected with the electricity taking ring (31), and the lower end of the short-circuit discharging assembly is electrically connected with the conductive head (35) so as to short-circuit the two windings; When the short-circuit discharging assembly moves upwards to the second position, the lower end is disconnected from the conductive head, so that the two windings are disconnected.
2. The transformer defect simulation test device according to claim 1, wherein the first conductive module further comprises a contact finger spring (32), an annular groove is formed in the inner wall of the electricity taking ring (31), the contact finger spring (32) is embedded in the annular groove and is electrically connected with the electricity taking ring (31), the short circuit discharging assembly is arranged in the contact finger spring (32) in a penetrating manner, is in sliding fit with the contact finger spring (32) along the axial direction, and radially presses the contact finger spring (32) along the electricity taking ring (31); when the short-circuit discharging assembly moves downwards to the first position, the short-circuit discharging assembly is in contact with and electrically connected with the electricity taking ring (31) and the contact finger springs (32), and the lower end of the short-circuit discharging assembly is electrically connected with the conductive head (35) so as to enable the two windings to be short-circuited.
3. The transformer defect simulation test device according to claim 2, wherein the second conductive module further comprises a buffer spring (36), and the buffer spring (36) is disposed in the second insulating tube (33), and is connected to the top of the conductive head (35) and in conductive fit; When the short-circuit discharging assembly moves downwards to the first position, the short-circuit discharging assembly is in contact and electric connection with the electricity taking ring (31) and the contact finger springs (32), and the lower end of the short-circuit discharging assembly is in abutting connection with the buffer elastic sheet (36) and is in conductive fit, so that the two windings are short-circuited.
4. The transformer defect simulation test device according to claim 1, wherein a plurality of second oil through holes (34) are formed in the side surface of the second insulating tube (33) so that insulating oil in the insulating barrel enters the second insulating tube.
5. The transformer defect simulation test apparatus of claim 4, wherein the short-circuit discharge assembly comprises: the insulating rod (41) is coaxially arranged in the first insulating tube (20) in a penetrating way and is in sliding fit with the first insulating tube (20); the driving assembly (43) is connected with the isolation barrel (10), and the power output end of the driving assembly (43) is connected with the insulation rod (41) and used for driving the insulation rod (41) to slide along the axial direction; the discharging module is connected with the lower end of the insulating rod (41), penetrates through the electricity taking ring (31) and the second insulating tube (33) and is in sliding fit with the electricity taking ring (31) along the axial direction; When the driving assembly (43) drives the discharging module to move to the first position, the upper end of the discharging module is in contact with the electricity taking ring (31) and is electrically connected with the electricity taking ring, and the lower end of the discharging module is electrically connected with the conducting head (35) so as to enable the two windings to be in short circuit.
6. The transformer defect simulation test apparatus of claim 5, wherein the discharge module comprises: the insulating sleeve (51) is arranged in the electricity taking ring (31) and the second insulating tube (33) in a penetrating way and is in sliding fit with the electricity taking ring (31) along the axial direction, and a plurality of third oil ports (52) are arranged on the side surface of the insulating sleeve so that insulating oil in the second insulating tube enters the insulating sleeve (51); An upper contact (53) fixed at the lower end of the insulating rod (41), connected with the upper end of the insulating sleeve (51), and coaxially and equiradially arranged with the insulating sleeve (51); the conducting rod (54) is arranged in the insulating sleeve (51) in a penetrating way, is positioned at the lower side of the upper contact (53), and is in conductive connection with the upper contact (53); An upper electrode (55) which is arranged at the lower end of the conductive rod (54) and is connected with the conductive rod (54) in a conductive way; a lower contact (56) connected with the lower end of the insulating sleeve (51) and arranged at intervals with the upper electrode (55); The lower electrode (57) is arranged at the lower side of the upper electrode (55) and is in conductive connection with the lower contact (56), and the lower electrode (57) is in conductive fit with the upper electrode (55); The upper contact (53) is in conductive contact with the electricity taking ring (31) when the driving assembly drives the discharging module to move downwards to the first position, the lower contact (56) is electrically connected with the conductive head (35) so as to enable the two windings to be in short circuit, and the upper contact (53) is separated from the electricity taking ring (31) when the driving assembly drives the discharging module to move upwards to the second position, and the lower contact (56) is separated from the conductive head (35) so as to enable the two windings to be disconnected.
7. The transformer defect simulation test device according to claim 5, further comprising a sealing assembly, wherein the sealing assembly is arranged at the top of the isolation barrel (10) and is in sealing connection with the isolation barrel (10), a sealing part (42) is arranged at the upper end of the insulating rod (41), and the sealing part (42) penetrates through the sealing assembly and is in sliding sealing fit with the sealing assembly.
8. The transformer defect simulation test apparatus of claim 7, wherein the sealing assembly comprises: The sealing seat (61) is in sealing connection with the isolation barrel (10), a sliding hole is formed in the sealing seat (61), a clamping groove is formed in the side wall of the sliding hole, and the sealing part (42) is arranged in the sliding hole in a sliding mode; an oil seal (62) which is provided in the clamping groove and is tightly attached to the outer periphery of the sealing part (42); And the sealing ring (63) is embedded at the lower side of the sealing seat (61) and is tightly attached to the upper surface of the isolation barrel (10).

Description

Transformer defect simulation test device Technical Field The invention belongs to the technical field of electric appliances, and particularly relates to a transformer defect simulation test device. Background Transformers are one of the most important devices in power systems, and are high in cost and difficult to maintain, and once the transformer fails, huge losses are caused to the power system. About 2/3 of the transformer faults are winding faults, with turn-to-turn short circuit faults being the most common. Although the slight inter-turn fault does not affect the use of the transformer for a short period of time, most serious group fault incidents are developed from the slight inter-turn short circuit fault. The occurrence of short circuits in the two-phase windings of the transformer is relatively small and is mostly caused by improper operation of workers during assembly and maintenance. The transformer winding is subjected to turn-to-phase or inter-phase short circuit, so that short circuit current is larger, the transformer is violent in vibration and the temperature rise is accelerated, and therefore, the method for simulating the turn-to-turn and inter-phase short circuit faults of the transformer is very significant in researching the related characteristics of the transformer. At present, a short-circuit defect simulation device is usually installed on a transformer to actively short-circuit turns of the transformer and perform fault simulation. However, the existing short-circuit defect simulation device is generally inconvenient to disassemble and maintain. Disclosure of Invention The invention provides a transformer defect simulation test device, and aims to solve the technical problem that a short circuit defect simulation device in the prior art is generally inconvenient to detach and maintain. In order to achieve the above purpose, the technical scheme adopted by the invention is that the invention provides a transformer defect simulation test device, which comprises: The isolation barrel is suitable for being arranged on a transformer, the lower end of the isolation barrel extends into the transformer, insulating oil is contained in the isolation barrel, and the internal space of the isolation barrel is isolated from the internal space of the transformer; The wiring contacts are arranged on the isolation barrel at intervals, connected with the isolation barrel and penetrate through the isolation barrel, and are arranged at one end of the outer side of the isolation barrel and used for conducting connection with windings of the transformer through wires; the short circuit defect simulation assembly is arranged in the isolation barrel and is connected with one end of the wiring contact arranged in the isolation barrel through a wire so as to enable the two windings to be in short circuit. In one possible implementation manner of the transformer defect simulation test device provided by the invention, the short circuit defect simulation assembly comprises: the upper end of the first insulating tube penetrates through the top of the isolation barrel; The power taking assembly is connected with the lower end of the first insulating tube and is provided with a first conductive module and a second conductive module which are mutually insulated, the first conductive module is electrically connected with one of the wiring contacts through a wire, the second conductive module is electrically connected with the other wiring contact through a wire, and And the short circuit discharging assembly is in conductive contact with or separated from the first conductive module and the second conductive module through movement, when the short circuit discharging assembly is moved to a first position, the first conductive module and the second conductive module are in conductive contact, and when the short circuit discharging assembly is moved to a second position, the first conductive module and the second conductive module are separated. In one possible implementation manner of the transformer defect simulation test device provided by the invention, the first conductive module comprises an electricity taking ring, wherein the electricity taking ring is coaxially connected to the lower end of the first insulating tube; The second conductive module comprises a conductive head, and the conductive head is communicated with the other wiring contact through a wire; the power taking assembly further comprises a second insulating tube, the second insulating tube is arranged between the power taking ring and the conductive head, and two ends of the second insulating tube are respectively connected with the power taking ring and the conductive head; The short-circuit discharging assembly is arranged in the electricity taking ring and the second insulating tube in a penetrating way and is in sliding fit with the electricity taking ring along the axial direction; When the short-circuit discharging assembly moves do