CN106771816A - Core loss test platform and test method under rewinding material multipoint earth faults - Google Patents
Core loss test platform and test method under rewinding material multipoint earth faults Download PDFInfo
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- CN106771816A CN106771816A CN201611267962.9A CN201611267962A CN106771816A CN 106771816 A CN106771816 A CN 106771816A CN 201611267962 A CN201611267962 A CN 201611267962A CN 106771816 A CN106771816 A CN 106771816A
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- ground wire
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- adjustable resistance
- yoke
- core loss
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
Abstract
The invention discloses core loss test platform and test method under a kind of rewinding material multipoint earth faults, mainly include：Computer, communication shift control module, fault simulation module, power analyzer and transformer.It is characterized in that：Exciting Windings for Transverse Differential Protection is wound with the iron core of the transformer, the Exciting Windings for Transverse Differential Protection is connected with power analyzer, 12 ground wires are drawn from the interior diverse location unshakable in one's determination, the ground wire is connected with fault simulation module.The method of the present invention is the core loss under measurement diverse location multipoint earth faults unshakable in one's determination using platform of the present invention, probes into influence of the multipoint earthing unshakable in one's determination to core loss.
Description
Technical field
The invention belongs to transformer fault simulation field, core loss examination under particularly a kind of rewinding material multipoint earth faults
Test platform.
Background technology
Transformer is one of visual plant of power system, its can normally influence on system operation power system security and
Reliability.Transformer core is one of critical piece of generation failure, when transformer normally runs, in order to prevent iron core from going out over the ground
Existing floating potential, so as to cause intermittence disruptive discharge over the ground unshakable in one's determination, iron core must have some reliable grounds, but when iron core goes out
When being now grounded for more than 2 points, the uneven current potential between iron core will form circulation between earth point, and cause the part of iron core
Overheat, so as to cause the increase of open circuit loss unshakable in one's determination.
It is mostly based on laminated core transformation currently for the research work of transformer core multipoint earthing and open circuit loss
Device, laminated core is that the silicon steel sheet stack of mutually insulated is formed together, and rewinding material is formed, two by silicon strip coiling
Its internal circulation circulation path has certain difference after planting multipoint earthing unshakable in one's determination, so can not phase to open circuit loss unshakable in one's determination
Together, the device of relevance between the multipoint earthing and core loss of studying Wound iron-core transformer but is also lacked at present.
The content of the invention
The purpose of the present invention is that Wound iron-core transformer is unshakable in one's determination to be damaged in diverse location multipoint earth faults with unshakable in one's determination in order to study
Relevance between consumption.
In order to solve the above-mentioned technical problem, the embodiment of the invention discloses following technical scheme：
Core loss test platform under a kind of rewinding material multipoint earth faults, mainly includes：Computer 100, communication conversion
Control module 200, fault simulation module cage 300, power analyzer 400, transformer 500 are constituted, and the computer turns with communication
Change control module to be connected, communication shift control module control fault simulation module and power analyzer, unshakable in one's determination the 1 of the transformer
Be rewinding material, 1 grounded line group unshakable in one's determination is connected with fault simulation module, be wound with Exciting Windings for Transverse Differential Protection 2 on described unshakable in one's determination 1, excitation around
Group 2 is connected with power analyzer；
Ground wire group upper yoke respectively from rewinding material, lower yoke and secondary side core limb are drawn, wherein：Upper yoke connects
Ground wire group one is from upper yoke 30% with extraction at level position；Upper yoke ground wire group two is drawn from the band of upper yoke about 70% level position
Go out, from secondary side stem 30% with being drawn at level position, secondary side stem ground wire group two is from the secondary side heart for secondary side stem ground wire group one
Post 70% is with extraction at level position；Lower yoke ground wire group one is from lower yoke 30% with extraction at level position；Lower yoke ground wire
Group two is from lower yoke 70% with extraction at level position；Each ground wire group is drawn from the adjacent silicon steel sheet of iron yoke corresponding site two：On
Iron yoke ground wire group one includes ground wire 33 and ground wire 34；Upper yoke ground wire group two includes ground wire 44 and ground wire
55；Secondary side stem ground wire group one includes ground wire 88 and ground wire 10；Secondary side stem ground wire group two includes ground wire
77 and ground wire 99；Lower yoke ground wire group one includes ground wire 12 and ground wire 13；Lower yoke ground wire group two is wrapped
Containing ground wire 11 and ground wire 14；
There are three adjustable resistances of parallel connection, i.e. the first adjustable resistance, second in the casing 1 of the fault simulation case 300
Adjustable resistance and the 3rd adjustable resistance；One end of each adjustable resistance is connected with ground strip 16, and the other end passes through a relay and connects
Ground wire is connected；The ground wire group that the right side of each adjustable resistance is drawn by relay group with rewinding material is connected, i.e.,：First relay
Device group is respectively connected with ground wire four, ground wire 55 and ground wire 66；Second relay group and ground wire 88, ground wire 99
It is respectively connected with ground wire 10；Second relay group is respectively connected with ground wire 88, ground wire 99 and ground wire 10.
Described casing 15 uses composite construction, and internal layer is epoxide resin material, and outer layer is Steel material, to reach and the external world
Preferable buffer action, the upper surface of casing 15 is provided with three knobs (S1, S2, S3), three resistance display modules (17,18,
19), 20,12 external wiring terminals (21~32) of an electric current display module and a Rogowski coil 33.
Knob S1, S2 and S3 are connected with adjustable resistance R1, R2 and R3 respectively, and the resistance display module (19~21) is respectively
It is in parallel with adjustable resistance (R1~R3), adjusted by knob S1, S2 and S3 and change resistance value, display module (19~21) display electricity
Resistance size.
12 external wiring terminals (21~32) are connected with ground wire (3~14) respectively, electric current display module 20
In parallel with Rogowski coil 33, Rogowski coil 33 is enclosed within total ground wire, can reach the purpose of real-time monitoring earth current.
Described Exciting Windings for Transverse Differential Protection 2 is connected with power analyzer, it is measurable go out different ground connection situations under unshakable in one's determination loss value.
It is a kind of unshakable in one's determination in the case where above-mentioned test platform completes rewinding material multipoint earth faults the present invention also aims to provide
The method of loss test, its specific means is：
Core loss measuring method under multipoint earth faults unshakable in one's determination, multipoint earthing unshakable in one's determination is carried out using above-mentioned test platform
Core loss measurement, comprises the following steps under failure：
1) computer sends instruction to communication shift control module, and certain relay is logical in control fault simulation module
It is disconnected, a kind of iron core grounding failure is set to transformer；
2) computer sends instruction to communication shift control module, and the lossy data of iron core is measured using power analyzer,
And data are transferred to computer by communicating shift control module；
3) repeat step 1) and 2)；
4) measurement obtains different ground fault conditions and its corresponding core loss data, and is analyzed.
Compared with prior art, its remarkable advantage is the present invention：With under a kind of rewinding material multipoint earth faults of the invention
Core loss test platform can be carried out in diverse location multipoint earth faults unshakable in one's determination to rely on, and monitor the size of fault current
While, probe into influence of the failure situation to core loss, apparatus of the present invention simple structure, detection and convenient reading.
Brief description of the drawings
Fig. 1 is general structure schematic diagram of the invention
Fig. 2 is transformer device structure schematic diagram of the invention
Fig. 3 is unshakable in one's determination and ground wire connection diagram of the invention
Fig. 4 is fault simulation inside modules structural representation of the invention
Fig. 5 is fault simulation modular tank panel schematic diagram of the invention
Specific embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings：
The present invention is a kind of experimental rig of transformer core multipoint earth faults, can carry out diverse location multiple spot unshakable in one's determination
The simulation of earth fault, monitors the size of fault current, probes into influence of the earth resistance to failure situation.
Fig. 1 summarizes structural representation for the present invention, mainly includes transformer 500, fault simulation module 300, power analysis
Unshakable in one's determination the 1 of instrument 400, communication conversion module 200, computer 100, wherein transformer 500 is rewinding material, coiling on described unshakable in one's determination 1
Exciting Windings for Transverse Differential Protection 2,12 ground wires (3~14), the ground wire (3~14) and event are drawn from diverse location in described unshakable in one's determination 1
Barrier analog module 300 is connected, and fault simulation module is connected with communication conversion module, the communication conversion module and computer phase
Even.
Fig. 2 is unshakable in one's determination with ground wire connection diagram in the present invention, with reference to Fig. 3 it can be seen that, with upper yoke ground wire (3,5)
As a example by, wherein ground wire 33 is drawn from the band of upper yoke about 30% level position, and ground wire 55 is from upper yoke about 70% with level
Place is put to draw.Wherein, ground wire (3~14) uses enamel-cover wire material, prevents from causing short circuit during picking out, and is with Fig. 2
Example understands that wherein ground wire (3,4) is drawn from the band of upper yoke about 30% level position, and ground wire (5,6) is from upper yoke about 70%
Band is drawn at level position, and ground wire (8,10) is drawn from the band of secondary side stem about 30% level position, and ground wire (7,9) is from the secondary side heart
The band of post about 70% is drawn at level position, and ground wire (12,13) is drawn from the band of lower yoke about 30% level position, ground wire (11,
14) drawn from the band of lower yoke about 70% level position.
Fig. 4 is apparatus of the present invention fault simulation inside modules structural representation, and fault simulation module 300 mainly includes three
Adjustable resistance R1, R2 and R3,12 relays (J1~J12) and a ground strip 16, it is placed in casing 15；Relay
J1 is connected with ground wire 33, and relay (J2, J3, J4) is connected with ground wire (4,5,6) respectively, relay J5 and ground wire 77
It is connected, relay (J6, J7, J8) is connected with ground wire (8,9,10) respectively, and relay J9 is connected with ground wire 11, relay
Device (J10, J11, J12) is connected with ground wire (12,13,14) respectively, and relay (J1~J12) other end is with ground strip (16) even
Connect, the break-make by relay is to be capable of achieving different ground connections.
Fig. 5 is fault simulation modular tank panel schematic diagram of the invention, and casing 15 uses composite construction, and internal layer is epoxy
Resin material, outer layer is Steel material, with reach with extraneous preferably buffer action, the upper surface of casing is provided with three knobs
(S1, S2, S3), three resistance display modules (17,18,19), 20,12 external wiring terminals of an electric current display module
(21~32) and Rogowski coil 33.Knob (S1, S2, S3) is connected with adjustable resistance (R1, R2, R3) respectively, the resistance
Display module (19~21) is in parallel with adjustable resistance (R1~R3) respectively, is adjusted by knob (S1, S2, S3) and changes resistance value,
Display module (19~21) shows resistance value size.12 external wiring terminals (21~32) respectively with ground wire (3~
14) it is connected, electric current display module 20 is in parallel with Rogowski coil 33, and Rogowski coil 33 is enclosed within total ground wire, can reach prison in real time
Survey the purpose of earth current.
Embodiments of the present invention are the fault simulations of rewinding material diverse location multipoint earthing, below by taking upper yoke as an example,
Multipoint earth faults simulation to rewinding material upper yoke diverse location of the present invention is described in further detail：
Normal operating condition：When simulation Wound iron-core transformer normally runs, ground wire 33 is grounded, will relay J1
Closure, remaining relay is off.
Abort situation one：The ground wire 33 and ground wire 55 that two of upper yoke are in different band level position connect simultaneously
Ground, other ground wires are in open circuit, will relay J1 and relay J3 closures, remaining relay is off.
Abort situation two：Two of upper yoke are in the same ground wire 33 with level position and ground wire 44 connects simultaneously
Ground, other ground wires are in open circuit, will relay J1 and relay J2 closures, remaining relay is off.
Abort situation three：The ground wire 33 and ground wire 66 that two of upper yoke are in different band level position connect simultaneously
Ground, other ground wires are in open circuit, will relay J1 and relay J4 closures, remaining relay is off.
Method of testing of the invention is comprised the following steps：
1) computer 100 sends instruction to communication shift control module 200, in control fault simulation module 300 certain after
The break-make of electrical equipment, a kind of iron core grounding failure is set to transformer 500；
2) computer 100 sends instruction to communication shift control module 200, and unshakable in one's determination 1 is measured using power analyzer 400
Lossy data, and data are transferred to computer by communicating shift control module 200；
3) repeat step 1) and 2)；
4) measurement obtains the core loss data under correspondence ground fault condition, and is analyzed.
Claims (3)
1. core loss test platform under a kind of rewinding material multipoint earth faults, mainly includes：Computer (100), communication conversion
Control module (200), fault simulation module cage (300), power analyzer (400), transformer (500) are constituted, the computer
It is connected with communication shift control module, communication shift control module control fault simulation module and power analyzer, the transformation
The iron core (1) of device is rewinding material, and (1) grounded line group unshakable in one's determination is connected with fault simulation module, is wound with the iron core (1) and encouraged
Magnetic winding (2), Exciting Windings for Transverse Differential Protection (2) is connected with power analyzer；
Ground wire group upper yoke respectively from rewinding material, lower yoke and secondary side core limb are drawn, wherein：Upper yoke ground wire
Group one is from upper yoke 30% with extraction at level position；Upper yoke ground wire group two is drawn from the band of upper yoke about 70% level position,
, from secondary side stem 30% with being drawn at level position, secondary side stem ground wire group two is from secondary side stem for secondary side stem ground wire group one
Drawn at 70% band level position；Lower yoke ground wire group one is from lower yoke 30% with extraction at level position；Lower yoke ground wire group
Two from lower yoke 70% with level position draw；Each ground wire group is drawn from the adjacent silicon steel sheet of iron yoke corresponding site two：Upper iron
Yoke ground wire group one includes ground wire three (3) and ground wire three (4)；Upper yoke ground wire group two is comprising ground wire four (4) and connects
Ground wire five (5)；Secondary side stem ground wire group one includes ground wire eight (8) and ground wire ten (10)；Secondary side stem ground wire group two
Comprising ground wire seven (7) and ground wire nine (9)；Lower yoke ground wire group one includes ground wire ten two (12) and ground wire (13)；
Lower yoke ground wire group two includes ground wire ten one (11) and ground wire ten four (14)；
There are in the fault simulation case (300) three adjustable resistances of parallel connection, i.e. the first adjustable resistance, the second adjustable resistance and
3rd adjustable resistance；One end of each adjustable resistance is connected with ground strip (16), and the other end is connected by a relay with ground wire；
The ground wire group that the right side of each adjustable resistance is drawn by relay group with rewinding material is connected, i.e.,：First relay group with connect
Ground wire four (4), ground wire five (5) and ground wire six (6) are respectively connected with；Second relay group and ground wire eight (8), ground wire nine
(9) it is respectively connected with ground wire ten (10)；Second relay group and ground wire eight (8), ground wire nine (9) and ground wire ten (10)
It is respectively connected with.
2. core loss test platform under rewinding material multipoint earth faults according to claim 1, it is characterised in that：It is described
The upper surface of fault simulation module cage (300) be provided with three knobs, three resistance display modules, electric current display modules
(20), 12 external wiring terminals and a Rogowski coil；The knob respectively with the first adjustable resistance, the second adjustable resistance
It is connected with the 3rd adjustable resistance；The resistance display module respectively with the first adjustable resistance, the second adjustable resistance and the 3rd adjustable
Resistor coupled in parallel；The electric current display module is in parallel with Rogowski coil, and Rogowski coil is enclosed within total ground wire；12 outsides
Binding post is connected with each ground wire of ground wire group respectively.
3. core loss measuring method under multipoint earth faults unshakable in one's determination, it is characterized by, using the experiment described in claim 1 to 2
Platform carries out core loss measurement under multipoint earth faults unshakable in one's determination, comprises the following steps：
1) computer sends instruction to communication shift control module, and the break-make of certain relay, right in control fault simulation module
Transformer sets a kind of iron core grounding failure；
2) computer sends instruction to communication shift control module, and the lossy data of iron core is measured using power analyzer, and will
Data are transferred to computer by communicating shift control module；
3) repeat step 1) and 2)；
4) measurement obtains different ground fault conditions and its corresponding core loss data, and is analyzed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611267962.9A CN106771816B (en) | 2016-12-31 | 2016-12-31 | Core loss test platform and test method under rewinding material multipoint earth faults |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611267962.9A CN106771816B (en) | 2016-12-31 | 2016-12-31 | Core loss test platform and test method under rewinding material multipoint earth faults |
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| CN106771816B CN106771816B (en) | 2018-07-31 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108510002A (en) * | 2018-04-02 | 2018-09-07 | 西南交通大学 | The detection method of rewinding material tractive transformer winding resistance to shorting impact capacity |
| CN108732450A (en) * | 2018-04-02 | 2018-11-02 | 西南交通大学 | Short-circuit detecting system and method between high-power transformer rewinding material piece |
| CN110275056A (en) * | 2019-07-31 | 2019-09-24 | 西南交通大学 | A kind of rewinding material multipoint earth faults current calculation method considering the classification of silicon steel sheet cross-sectional width |
| CN110376453A (en) * | 2019-06-23 | 2019-10-25 | 西南交通大学 | A kind of transformer winding radial deformation fault simulation platform and application method |
| CN114113829A (en) * | 2021-10-28 | 2022-03-01 | 探博士电气技术(杭州)有限公司 | Assembling method of transformer fault simulation device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108510002A (en) * | 2018-04-02 | 2018-09-07 | 西南交通大学 | The detection method of rewinding material tractive transformer winding resistance to shorting impact capacity |
| CN108732450A (en) * | 2018-04-02 | 2018-11-02 | 西南交通大学 | Short-circuit detecting system and method between high-power transformer rewinding material piece |
| CN108732450B (en) * | 2018-04-02 | 2019-06-04 | 西南交通大学 | Short-circuit detection method between high-power transformer rewinding material piece |
| CN110376453A (en) * | 2019-06-23 | 2019-10-25 | 西南交通大学 | A kind of transformer winding radial deformation fault simulation platform and application method |
| CN110275056A (en) * | 2019-07-31 | 2019-09-24 | 西南交通大学 | A kind of rewinding material multipoint earth faults current calculation method considering the classification of silicon steel sheet cross-sectional width |
| CN114113829A (en) * | 2021-10-28 | 2022-03-01 | 探博士电气技术(杭州)有限公司 | Assembling method of transformer fault simulation device |
| CN114113829B (en) * | 2021-10-28 | 2023-10-24 | 探博士电气技术(杭州)有限公司 | Assembling method of transformer fault simulation device |
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| CN106771816B (en) | 2018-07-31 |
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