CN115902694A - Transformer vibration signal test method under winding turn-to-turn short circuit fault - Google Patents
Transformer vibration signal test method under winding turn-to-turn short circuit fault Download PDFInfo
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- 238000004804 winding Methods 0.000 title claims abstract description 56
- 238000010998 test method Methods 0.000 title description 8
- 238000004088 simulation Methods 0.000 claims abstract description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000001133 acceleration Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000003745 diagnosis Methods 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
A method for testing transformer vibration signals under winding turn-to-turn short circuit faults mainly comprises a transformer body, an iron core, a winding, fault simulation accessories, a vibration sensor, a signal acquisition device, a computer and short circuit devices arranged in the fault simulation accessories, and can realize the winding turn-to-turn short circuit faults of different degrees, wherein the method is based on the frequency distribution of the transformer vibration signals under the short circuit faults under different conditions measured by a platform, and the method has the following technical effects: based on the platform, the vibration signal collection under the short-circuit faults of different degrees and different positions of the winding can be conveniently realized, and the relevance between the turn-to-turn short-circuit fault of the winding and the vibration frequency of the transformer is researched.
Description
Technical Field
The invention belongs to the technical field of transformer fault simulation, and particularly relates to a transformer vibration signal test platform and a test method under turn-to-turn short circuit fault of a winding.
Background
The transformer is one of core devices in an electric power system and a traction power supply system, the stability and the reliability of the transformer are related to the normal operation of the whole system, and along with the increase of power consumption, the diagnosis and the protection of transformer faults become the key points of operation and maintenance work.
The vibration analysis method is a transformer fault diagnosis method used at present, and diagnoses whether the winding has faults or not by analyzing frequency distribution of a vibration signal of a transformer body.
About 2/3 of transformer faults are winding faults, turn-to-turn short circuit faults are the most common faults, although slight turn-to-turn fault short circuits do not affect the use of the transformer, most serious winding fault accidents occur due to the development of the slight turn-to-turn short circuit faults, however, short circuit positions need to be found as soon as possible when the turn-to-turn short circuits occur, and then the transformer faults are solved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a transformer vibration signal test method under the turn-to-turn short circuit fault of a winding, so as to explore the relevance between the short circuit of the transformer winding in different degrees and the short circuit fault at different positions and the vibration frequency of the transformer, and the transformer vibration signal test method has the characteristics of convenience in operation and high sensitivity.
The technical scheme adopted by the invention is that a transformer vibration signal test platform under the turn-to-turn short circuit fault of a winding is characterized in that an iron core (2) is arranged in a transformer body (1), and a winding (3) is wound on the iron core (2); a fault simulation accessory (4) is arranged on the winding (3), a vibration sensor (5) is arranged on the surface of the transformer body (1), a signal acquisition device (6) acquires a vibration signal of the vibration sensor (5), the signal acquisition device (6) is directly connected with a computer (8), and the fault simulation accessory (4) is controlled by a wiring unit (7) and is remotely connected to the computer (8);
the fault simulation accessory (4) is a clamping piece box and is fixed between the transformer body (1) and the winding (3) through two supporting screw rods (9) and nuts (10); the clamping piece box is provided with three layers and comprises a wiring unit (7) controlled by a computer (8), the wiring unit (7) is electrically connected with the electromagnetic relays (11), the wiring unit (7) receives computer instructions to realize on-off control of different electromagnetic relays (11) in the fault simulation accessory (4), a short-circuit contact rod (12) is arranged in the middle, a short-circuit sliding block (14) is arranged on the right side, the short-circuit sliding blocks are isolated by an insulating sheet (15), and the short-circuit sliding blocks (14) are connected with winding short-circuit outgoing lines one by one through a plurality of terminals of a lead row (13).
According to the scheme of the invention, a clamping piece box of a fault simulation accessory (4) is provided with three layers of eight electromagnetic relays (11) in total, the eight electromagnetic relays correspond to 8 short-circuit sliding blocks (14), the short-circuit sliding blocks are correspondingly connected with a plurality of terminals of a lead wire row (13), the terminals of the lead wire row (13) are connected with winding short-circuit lead wires one by one, the electromagnetic relays (11) are connected with a wiring unit (7), the wiring unit (7) is connected with a computer (8), an instruction is sent to the wiring unit (7) through the computer (8), the electromagnetic relays (11) can act to control the sliding out and withdrawing of the short-circuit sliding blocks (14), when the short-circuit sliding blocks (14) at corresponding positions slide out, the winding turn-to-turn short circuit can be realized by contacting with a short-circuit contact rod (12), and turn-to-turn short-circuit faults at different short-circuit positions can be realized by controlling the sliding out of the short-circuit sliding blocks (12) at different rows.
The invention also aims to provide a test method for the test platform, which comprises the following specific measures:
the method for testing the vibration signal of the transformer under the turn-to-turn short circuit fault of the winding adopts the device of claim 1 to test the vibration signal of the transformer under the turn-to-turn short circuit of the winding, and is characterized by comprising the following steps:
the first step is as follows: the vibration sensor (5) is arranged on the outer surface of the transformer body (1), the signal acquisition device (6) is connected with the computer (8) through a data line, and the fault simulation accessory (4) is remotely connected with the computer (8) through a wiring unit (7);
the second step is that: sending an instruction signal to a wiring unit (7) of a fault simulation accessory (4) by using a computer (8), controlling the conduction of an electromagnetic relay (11) on the fault simulation accessory by the wiring unit, attaching a short-circuit sliding block (14) to a short-circuit contact rod (12), and realizing the turn-to-turn short circuit of a transformer winding when two short-circuit sliding blocks are attached to the short-circuit contact rod;
the third step: in the second step, collecting vibration signals collected by the signal collecting device (6), uploading data to a computer (8) through a data line, and recording the corresponding short circuit condition of the winding;
the fourth step: repeating the second step and the third step, setting the voltage to change from 10kv,20kv,40kv,60kv,80kv and 100kv, sending different instructions to the wiring unit (7) to obtain winding turn-to-turn short circuit faults of different degrees and different parts, and recording data;
the fifth step: counting vibration signals of turn-to-turn short circuits under different conditions, and analyzing to obtain a vibration coefficient during short circuit, wherein the expression is as follows:
wherein a is the vibration coefficient, V α Is the amplitude of acceleration, f α Working frequency 50Hz, d is the thickness of the transformer body, f is the frequency corresponding to the vibration signal, when a is less than or equal to 0, the transformer winding works normally, and when a is less than or equal to 0>When 0, turn-to-turn short circuit occurs in the transformer winding,
by adopting the transformer vibration signal test method under the turn-to-turn short circuit fault of the winding, the relevance of the short circuit of the transformer winding in different degrees and the short circuit fault at different positions and the transformer vibration signal characteristic can be researched, and the method has the characteristics of convenience in operation, high sensitivity and the like.
Drawings
FIG. 1 is a block diagram of a process employed by the present invention.
Fig. 2 is a side view of the overall structure according to the present invention.
Fig. 3 is a circuit diagram of a connection unit according to the present invention.
FIG. 4 is a side view of a shorting slider according to the present invention.
Detailed Description
The invention relates to a transformer vibration signal test method under winding turn-to-turn short circuit faults, which can simulate the turn-to-turn short circuit faults of different short circuit positions and different short circuit degrees of a winding and can realize the relevance research between the winding turn-to-turn short circuit faults and the transformer vibration frequency.
The invention is explained in more detail below with reference to the figures and the embodiments:
FIG. 1 is a flow chart adopted by the invention, a computer sends a signal to a wiring unit to control an electromagnetic relay to act, a signal acquisition device receives a vibration signal of a vibration sensor, the computer summarizes and analyzes the acquired vibration signal and calculates a vibration coefficient a, and if a is greater than 0, a turn-to-turn short circuit occurs in a transformer winding; if a is less than or equal to 0, the transformer winding is normal.
As shown in fig. 2, the transformer vibration signal test platform under the winding turn-to-turn short circuit fault is characterized in that an iron core (2) is arranged in a transformer body (1), and a winding (3) is wound on the iron core (2); a fault simulation accessory (4) is arranged on the winding (3), a vibration sensor (5) is arranged on the surface of the transformer body (1), a signal acquisition device (6) acquires a vibration signal of the vibration sensor (5), the signal acquisition device (6) is directly connected with a computer (8), and the fault simulation accessory (4) is controlled by a wiring unit (7) and is remotely connected to the computer (8);
fig. 3 is a circuit diagram of a wiring unit, in a fault simulation accessory (4), a wiring unit (7) is arranged in the fault simulation accessory (4), the wiring unit (7) controls an electromagnetic relay (11), the electromagnetic relay (11) corresponds to a short circuit sliding block (14) in a one-to-one manner, the short circuit sliding block (14) is connected with a contact on a lead plate (13), the contact is connected with a winding short circuit outgoing line, the fault simulation accessory (4) is fixed between a transformer body (1) and a winding (3) through a supporting screw rod (9) and a nut (10), the wiring unit (7) plays a role in time-sharing control on the electromagnetic relays (11), and the wiring unit (7) controls the power supply of the electromagnetic relay (11) by controlling the on-off state of an IGBT.
Fig. 4 is a diagram of a short-circuit sliding block, wherein 4 insulating pulleys (16) are arranged in one short-circuit sliding block, 2 iron blocks (19) are matched with an electromagnetic relay (11) to act, the periphery of each iron block is surrounded by an insulating layer (17), a copper rod (18) is clamped in the middle of each iron block to form a short-circuit loop, and when the electromagnetic relay (11) acts, the short-circuit sliding block (14) is attracted to slide to a short-circuit contact rod (12) to achieve short-circuit fault simulation.
The specific method involved is as follows:
the first step is as follows: the vibration sensor (5) is arranged on the outer surface of the transformer body (1), the signal acquisition device (6) is connected with the computer (8) through a data line, and the fault simulation accessory (4) is remotely connected with the computer (8) through a wiring unit (7);
the second step is that: sending an instruction signal to a wiring unit (7) of a fault simulation accessory (4) by using a computer (8), controlling the conduction of an electromagnetic relay (11) on the fault simulation accessory by the wiring unit, attaching a short-circuit sliding block (14) to a short-circuit contact rod (12), and realizing the turn-to-turn short circuit of a transformer winding when two short-circuit sliding blocks are attached to the short-circuit contact rod;
the third step: in the second step, collecting vibration signals collected by the signal collecting device (6), uploading data to a computer (8) through a data line, and recording the corresponding short circuit condition of the winding;
the fourth step: repeating the second step and the third step, setting the voltage to change from 10kv,20kv,40kv,60kv,80kv and 100kv, sending different instructions to the wiring unit (7) to obtain winding turn-to-turn short circuit faults of different degrees and different parts, and recording data;
the fifth step: counting vibration signals of turn-to-turn short circuits under different conditions, and analyzing to obtain a vibration coefficient during short circuit, wherein the expression is as follows:
wherein a is the vibration coefficient, V α Is the amplitude of acceleration, f α Working frequency 50Hz, d is the thickness of the transformer body, f is the frequency corresponding to the vibration signal, when a is less than or equal to 0, the transformer winding works normally, and when a is less than or equal to 0>At 0, a turn-to-turn short circuit occurs in the transformer winding.
Claims (2)
1. The transformer vibration signal test platform under the winding turn-to-turn short circuit fault is characterized in that an iron core (2) is arranged in a transformer body (1), and a winding (3) is wound on the iron core (2); a fault simulation accessory (4) is arranged on the winding (3), a vibration sensor (5) is arranged on the surface of the transformer body (1), a signal acquisition device (6) acquires a vibration signal of the vibration sensor (5), the signal acquisition device (6) is directly connected with a computer (8), and the fault simulation accessory (4) is controlled by a wiring unit (7) and is remotely connected to the computer (8);
the fault simulation accessory (4) is a clamping piece box and is fixed between the transformer body (1) and the winding (3) through two supporting screw rods (9) and nuts (10); the clamping piece box is provided with three layers and comprises a wiring unit (7) controlled by a computer (8), the wiring unit (7) is electrically connected with the electromagnetic relays (11), the wiring unit (7) receives computer instructions to realize on-off control of different electromagnetic relays (11) in the fault simulation accessory (4), a short-circuit contact rod (12) is arranged in the middle, a short-circuit sliding block (14) is arranged on the right side, the short-circuit sliding blocks are isolated by an insulating sheet (15), and the short-circuit sliding blocks (14) are connected with winding short-circuit outgoing lines one by one through a plurality of terminals of a lead row (13).
2. The method for testing the vibration signal of the transformer under the winding turn-to-turn short circuit fault adopts the device of claim 1 to test the vibration signal of the transformer under the winding short circuit fault, and is characterized by comprising the following steps:
the first step is as follows: the vibration sensor (5) is arranged on the outer surface of the transformer body (1), the signal acquisition device (6) is connected with the computer (8) through a data line, and the fault simulation accessory (4) is remotely connected with the computer (8) through a wiring unit (7);
the second step is that: a computer (8) is used for sending an instruction signal to a wiring unit (7) of a fault simulation accessory (4), the wiring unit controls the conduction of an electromagnetic relay (11) on the fault simulation accessory to enable a short-circuit sliding block (14) to be attached to a short-circuit contact rod (12), and when two short-circuit sliding blocks are attached to the short-circuit contact rod, the turn-to-turn short circuit of a transformer winding is realized;
the third step: in the second step, collecting vibration signals collected by the signal collecting device (6), uploading data to a computer (8) through a data line, and recording the corresponding short circuit condition of the winding;
the fourth step: repeating the second step and the third step, setting the voltage to change from 10kv,20kv,40kv,60kv,80kv and 100kv, sending different instructions to the wiring unit (7) to obtain winding turn-to-turn short circuit faults of different degrees and different parts, and recording data;
the fifth step: counting vibration signals of turn-to-turn short circuits under different conditions, and analyzing to obtain a vibration coefficient during short circuit, wherein the expression is as follows:
wherein a is the vibration coefficient, V α Is the amplitude of acceleration, f α Working frequency is 50Hz, d is the thickness of the transformer body, f is the frequency corresponding to the vibration signal, when a is less than or equal to 0, the transformer winding works normally, and when a is less than or equal to 0>At 0, a turn-to-turn short circuit occurs in the transformer winding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211481048.XA CN115902694A (en) | 2022-11-24 | 2022-11-24 | Transformer vibration signal test method under winding turn-to-turn short circuit fault |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211481048.XA CN115902694A (en) | 2022-11-24 | 2022-11-24 | Transformer vibration signal test method under winding turn-to-turn short circuit fault |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202720302U (en) * | 2012-07-27 | 2013-02-06 | 江苏省电力公司南京供电公司 | Simulation system for fault phenomena of turn-to-turn short circuit and insulating property reduction of winding |
| CN106526394A (en) * | 2016-12-31 | 2017-03-22 | 西南交通大学 | Iron core local temperature rise testing system and method in short circuit fault between wound core pieces |
| CN106646098A (en) * | 2016-12-31 | 2017-05-10 | 西南交通大学 | Winding frequency response testing platform and method under short circuit fault between cores |
| JP2018096706A (en) * | 2016-12-08 | 2018-06-21 | ユカインダストリーズ株式会社 | Diagnostic method and diagnostic device of internal abnormality and deterioration of transformer |
| CN209927283U (en) * | 2019-05-17 | 2020-01-10 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Converter transformer vibration signal testing and state monitoring device |
| CN111474496A (en) * | 2020-04-09 | 2020-07-31 | 国网山东省电力公司滨州供电公司 | Transformer turn-to-turn short circuit rapid diagnosis method based on vibration signal identification |
| CN112130094A (en) * | 2020-09-22 | 2020-12-25 | 云南电网有限责任公司楚雄供电局 | Platform for researching correlation between winding turn-to-turn short circuit and oscillation wave and experimental method thereof |
-
2022
- 2022-11-24 CN CN202211481048.XA patent/CN115902694A/en active Pending
Patent Citations (7)
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|---|---|---|---|---|
| CN202720302U (en) * | 2012-07-27 | 2013-02-06 | 江苏省电力公司南京供电公司 | Simulation system for fault phenomena of turn-to-turn short circuit and insulating property reduction of winding |
| JP2018096706A (en) * | 2016-12-08 | 2018-06-21 | ユカインダストリーズ株式会社 | Diagnostic method and diagnostic device of internal abnormality and deterioration of transformer |
| CN106526394A (en) * | 2016-12-31 | 2017-03-22 | 西南交通大学 | Iron core local temperature rise testing system and method in short circuit fault between wound core pieces |
| CN106646098A (en) * | 2016-12-31 | 2017-05-10 | 西南交通大学 | Winding frequency response testing platform and method under short circuit fault between cores |
| CN209927283U (en) * | 2019-05-17 | 2020-01-10 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Converter transformer vibration signal testing and state monitoring device |
| CN111474496A (en) * | 2020-04-09 | 2020-07-31 | 国网山东省电力公司滨州供电公司 | Transformer turn-to-turn short circuit rapid diagnosis method based on vibration signal identification |
| CN112130094A (en) * | 2020-09-22 | 2020-12-25 | 云南电网有限责任公司楚雄供电局 | Platform for researching correlation between winding turn-to-turn short circuit and oscillation wave and experimental method thereof |
Non-Patent Citations (1)
| Title |
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| 张合栋等: "一种变压器绕组状态在线诊断方法的研究", 《电工电气》, no. 02, 15 February 2015 (2015-02-15), pages 38 - 42 * |
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