CN105842541B - A kind of direct current resistance of large transformer device for quick testing and test method - Google Patents
A kind of direct current resistance of large transformer device for quick testing and test method Download PDFInfo
- Publication number
- CN105842541B CN105842541B CN201610223339.7A CN201610223339A CN105842541B CN 105842541 B CN105842541 B CN 105842541B CN 201610223339 A CN201610223339 A CN 201610223339A CN 105842541 B CN105842541 B CN 105842541B
- Authority
- CN
- China
- Prior art keywords
- resistance
- pressure side
- electromagnet
- test module
- winding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses a kind of direct current resistance of large transformer device for quick testing and test methods, including high-pressure side test module and low-pressure side test module, high-pressure side test module includes current sampling resistor RN, in transformer per phase phase star winding difference series current sample resistance RN, current sampling resistor RN forms bleeder circuit of connecting with tested winding resistance RX, voltage test module per phase is connected respectively to voltmeter, and series connection bleeder circuit is concatenated on constant-current source；Low-pressure side test module includes controller, multicircuit relay and Current Voltage test module, controller is connected to relay and Current Voltage test module, relay is connected to the star-like side ABC phase windings of transformer high-voltage, low pressure triangle side abc phase windings and power supply, controller per the road ports Liang Ge and is also connected to display screen.The present invention realizes the accuracy of test data, reduces operating risk, improves operation work efficiency, it is ensured that the person and equipment safety.
Description
Technical field
The invention belongs to DCR of Transformer rapid testing technology fields, and in particular to a kind of high-power transformer direct current
Hinder device for quick testing and test method.
Background technology
The measurement of transformer winding D.C. resistance, can check the welding quality inside winding and winding, joint looseness,
Many defects such as tap switch poor contact.To ensureing that transformer safety operation plays important function.But it at present can not also be right
It carries out live testing and on-line monitoring, relies primarily on power failure and is tested, is the project that annual preventive trial must be done.Becoming
In all preventive trial projects of depressor, the 2/3 of the time of measuring total time of D.C. resistance.
On-the-spot test at present there are the problem of：
1, when existing step down side delta windings carry out D.C. resistance test, delta windings test problem：
1. electric system 110kV and the above main transformer, low-pressure side are delta connection, carrying out, main transformer low-pressure side is straight
When leakage resistance is tested, due to the particularity of delta connection, the testing time for carrying out winding D.C. resistance is very long, and data are difficult to
Stablize, transformer capacity is bigger, and this phenomenon is especially prominent.The authenticity of test data is set to be difficult to ensure.Sometimes even to becoming
Depressor winding does the judgement to make mistake.
2. the magnetic assist method test used for delta windings domestic at present, wiring is more complex, be easy to cause mistake and connects
Line is also high to testing crew technical know-how level requirement.It needs frequent thread-changing to operate during experiment, increases operating risk.
2, when existing high voltage side of transformer star winding carries out D.C. resistance test, the test of star-connection (YN) winding is deposited
In following problem：
1. main transformer high-pressure side winding is on-load voltage regulation mode, regulation regulation need to will test all gears, at present
Our test mode is first to carry out the straight of A phases (1~17 grade) winding by on-load voltage regulation institutional adjustment high-pressure side winding gear
After leakage resistance test, then commutation carries out the D.C. resistance test of B phases (17~1 grades) winding, then commutation carries out C phases (1~17
Shelves) winding D.C. resistance test；Time-consuming.
2. completing main transformer high-pressure side A, B, C phase winding direct resistance metering, three single cycles of load ratio bridging switch need to be frequently adjusted,
Load ratio bridging switch mechanical wear is big.Increase influence of the oxidation film of tap changer contact to three-phase equilibrium degree.
3. in commutation operating process, need to cut off test loop power supply, discharge winding, then commutation wiring behaviour
Make, then tested, the process that winding re-establishes magnetic flux is longer, and time-consuming.
It can generate heat when 4. electric current passing through winding when test, since winding is that single-phase galvanization is tested, each phase winding temperature
The factor inconsistent, the size of winding resistance is affected by temperature is spent, causing test data, there are certain deviations.Three-phase dc electricity
The problems such as unbalance factor of resistance is exceeded.
5. the domestic triple channel principle test mode used at present, neutral point lead portion does not have electric current logical when due to test
It crosses, it is whether normal that neutral point lead can not be verified, it is also necessary at least verify a data per phase by uniphase mode.
3, when existing high voltage side of transformer star winding carries out D.C. resistance test, load ratio bridging switch mechanism case tune
Pressure gear shift has the following problems：
1. when the winding D.C. resistance of testing high voltage side, needing a people to carry out high-pressure side winding in on-load voltage regulation mechanism one end and changing
The operation of shelves, to coordinate other end tester to carry out test operation, scene is test after confirming gear by exhaling the mode of singing
Personnel test again, and ergonomic is low.
2. since on-load voltage regulation mechanism end and tester carry out test operation end not in one place, scene is by two
End personnel exhale the mode sung come after confirming gear, then are tested by tester, be easy there are test leakage, repeat to survey the phenomenon that,
It is time-consuming and laborious.
Invention content
The technical problem to be solved by the present invention is to：For the above technical problems, it is straight to provide a kind of high-power transformer
Leakage resistance device for quick testing and test method solve the ergonomic brought at present to transformer winding direct current resistance m easurem ent
It is low, operating risk is high, time-consuming and the influence to test data, the accuracy of guarantee test data, reduce operating risk, improve
Operation work efficiency, it is ensured that the person and equipment safety.
The technical solution that the present invention takes is：A kind of direct current resistance of large transformer device for quick testing, including high-pressure side
Test module and low-pressure side test module, high-pressure side test module include current sampling resistor RN, in transformer A, B, C three-phase star
A, B of type winding, C-terminal difference series current sample resistance RN, current sampling resistor RN and tested winding per be mutually tested around
Group resistance RX composition series connection bleeder circuits, are connected respectively at the both ends current sampling resistor RN of transformer A, B and C three-phase concatenation
Voltmeter VAN, voltmeter VBN and voltmeter VCN are tested the both ends winding resistance RX in transformer A, B and C three-phase and are connected respectively to
Series connection bleeder circuit is concatenated on constant-current source by voltmeter VAX, voltmeter VBX and voltmeter VCX；Low-pressure side test module packet
Controller, multicircuit relay and Current Voltage test module are included, controller is connected to relay and Current Voltage test module, after
Electric appliance is connected to the star-like side ABC phase windings of transformer high-voltage, low pressure triangle side abc phase windings and power supply per the road ports Liang Ge,
Controller is also connected to display screen.
Relay includes 12 tunnel 1S, 2S, 3S, 4S, 3S, 6S, 7S, 8S, 9S, 10S, 11S and 12S, and 1S, 3S and 5S can divide
Positive pole is not connected with A phases, B phases with C, a phases that A phases can be separately connected by 2S, 4S, 6S with 8S, 10S and 12S respectively,
B phases are connected with c, and power cathode can be connected with a phases, b phases with c by 7S, 9S respectively with 11S.
High-pressure side test module further includes a kind of to transformer on-load voltage regulating mechanism long-distance operating device, including electromagnet one
With electromagnet two, electromagnet one and electromagnet two are fixedly connected on lifting shelves button panel, one He of movable core of electromagnet one
The movable core two of electromagnet two distinguishes the upshift button and down-shift button on face lifting shelves button panel.
Electromagnet one and electromagnet two are connected respectively to upshift button switch and down-shift button switch, upshift by control line
Button switch and down-shift button switch are connected to power supply, are opened by the upshift button switch and down-shift button of long-range connection power supply
It closes, can conveniently and efficiently carry out a liter downshift operation, control is simple, easy to maintain.
Electromagnet one and electromagnet two are connected to by clamping and fixing device on lifting shelves button panel, clamping and fixing device packet
Dismountable clamping device and the fixed mechanism mounted on clamping device bottom are included, is lifted by dismountable gripper mechanism grips
Electromagnet, is fixedly connected using fixing device, realizes being rapidly assembled and disassembled for electromagnet, carry significantly by shelves button panel
High experimental test efficiency.
Clamping device includes tetragonal body shape fixing hoop and the mobile clip of bar shaped, and fixing card is arranged in fixing hoop upper surface
Head is bound round, guide rod, fixing hoop head and mobile clip capitiform is arranged in the mobile hoop of mobile clip upper surface setting and left side
At oat tail groove structure, mobile clip is telescopically connected to by guide rod in the pilot hole of fixing hoop right side, in pilot hole
It is provided with compressed spring, compressed spring both ends are born against on being oriented to boom end Step Shaft and on the baffle in pilot hole aperture,
Fixing hoop head and mobile hoop are carried out tension and compression to lifting shelves button panel and consolidated by the compressed spring connected by your guide rod
It is fixed, it is easy to loading and unloading quick, it is suitable for the installation of the lifting shelves button panel of different in width size, and simple in structure, it is fixed,
Upper and lower position is easy to adjust on lifting shelves button panel, ensures that the position of electromagnet movable core is accurate.
Fixed mechanism includes two sliding slots and two pairs of L-type connection sheets of channel steel shape, symmetrically fixed before and after two sliding slots to connect
It is connected on fixing hoop, the groove face opposite installation of two sliding slots, each pair of connection sheet short side is entrenched in sliding slot, and uses holding screw
Fixed, each pair of connection sheet long side is fixedly connected on electromagnet one and electromagnet two, is carried out on the chute by the connection sheet of L-type
It is mobile so that left and right position is easy to adjust on lifting shelves button panel, ensures that the position of electromagnet movable core is accurate, easy to loading and unloading
Fast, connection is reliable, registration.
A kind of further includes video monitor to transformer on-load voltage regulating mechanism long-distance operating device, and video monitor passes through
Cable is connected to camera, and camera is mounted at lifting shelves button panel, and face lifts the gear indicator light on shelves button panel, adopts
Real-time remote monitoring is carried out to gear indicator light with monitoring remote video instrument and camera, so as to quickly make transformer winding
The remote operation control of D.C. resistance carries out remote trial, and it is low and time-consuming and laborious to avoid the man-machine efficacy that remote call-in is brought,
It ensure that the reliability of data,
Clip is connected on camera, clip is fixed on lifting shelves button panel by detachable movable mountings, is led to
It crosses the dismountable mode of clip and connects lifting gear button panel, handling are more convenient, and connection is reliable, easy to operate, can also be fixed on not
Same producer, different model load ratio bridging switch mechanism case on.
Camera is connected to clip by direction flexible, and the position of camera can be conveniently and efficiently carried out by adjusting Universal pipe
Adjustment is set, allows the head face gear indicator light of camera after adjustment.
Clip includes two clamping pieces and torsional spring, and two clamping pieces by axisymmetry are installed, and torsion is socketed in rotary shaft
Spring, two free end of torsional spring are resisted against two clamping pieces pressing part interior.
A kind of test method of direct current resistance of large transformer device for quick testing, this approach includes the following steps：
(1) high-pressure side D.C. resistance is tested：The corresponding ammeter voltmeter of tester is connected by high-pressure side test module
It is connected to high voltage side of transformer, and distinguishes series current sample resistance RN in A, B of transformer A, B, C three-phase star winding, C-terminal,
Current sampling resistor RN forms bleeder circuit of connecting, current voltmeter test with tested winding per winding resistance RX is mutually tested
Per phase RN both end voltages and electric current, you can measure every phase resistance：Calculation formula is as follows；
(2) low-pressure side D.C. resistance is tested：The corresponding ammeter voltmeter of tester is connected by low-pressure side test module
It is connected to step down side, the difference that multicircuit relay realizes high-pressure side winding and low-pressure side winding is automatically controlled by controller
The break-make in path, and circuit is connected to power supply, you can low-pressure side is measured per phase resistance, and being calculated by controller can be by result
It is shown on display screen.
Beneficial effects of the present invention：Compared with prior art, the present invention has following effect：
(1) present invention by can measure the high-pressure side test module of high-pressure side D.C. resistance simultaneously and by controller it is automatic
Control relay switching measures the low-pressure side test module of low-pressure side D.C. resistance, realizes the accuracy of test data,
Operating risk is reduced, operation work efficiency is improved, it is ensured that the person and equipment safety solve at present to transformer winding direct current resistance m easurem ent
The ergonomic that brings is low, operating risk is high, and time-consuming and the influence to test data；
(2) because being measured simultaneously using three-phase, transformer neutral point lead portion is included in and tests back high-pressure side test module
Lu Zhong, while whether also demonstrate neutral point lead normal solves domestic at present using under triple channel principle test mode, nothing
Whether method verifies neutral point lead normal, it is also necessary to the drawbacks of at least verifying a data by the every phase of uniphase mode, due to being three
It is tested when identical, and resultant flux caused by each phase current is zero, curent change transient process shortens dramatically, and completes a change
The depressor whole gear testing time is the 1/3 of the single-phase testing time, and testing efficiency greatly improves, time saving and energy saving, while measuring guarantor
Card is consistent per phase winding temperature, substantially increases measuring accuracy and reliability, reduces the use of contact, reduces mechanical mill
Damage, reduces influence of the oxidation film of tap changer contact to three-phase equilibrium degree, the service life is longer；
(3) low-pressure side test module by controller and relay high and low pressure side can be together in series energization flow measurement survey
Low pressure winding D.C. resistance is measured, using the high-voltage winding magnetic assist of same-phase and same polarity, since the number of turns of high-voltage winding is more than low
That presses is more, by means of the number of ampere turns of high-voltage winding, transformer core is made to be saturated, and reduces inductance, you can reduces time constant, reaches
The purpose quickly measured, the magnetic assist method mode of connection that the present invention passes through automatic switchover, you can be automatically performed thread-changing operation, substitute people
Power frequency numerous ascend a height operation and false wiring improve operation effect, reduce that operating risk and false wiring bring to test data
The judgement of mistake.
Description of the drawings
Fig. 1 is the test structure schematic diagram of the present invention；
Fig. 2 is the high-pressure side test module schematic diagram of circuit connection structure of the present invention；
Fig. 3 is the low-pressure side test module control structure schematic diagram of the present invention；
Fig. 4 is the Relay Link Circuit structural schematic diagram of Fig. 3；
Fig. 5 is the test Rac electrical block diagrams of Fig. 3；
Fig. 6 is the test Rab electrical block diagrams of Fig. 3；
Fig. 7 is the test Rbc electrical block diagrams of Fig. 3；
Fig. 8 is that the high-pressure side gear of the present invention replaces remote operation structural schematic diagram；
Fig. 9 is the schematic diagram of circuit connection structure in Fig. 8；
Figure 10 is the left view structural representation of Fig. 8；
Figure 11 is that the lifting in Fig. 8 keeps off button plate structure schematic diagram；
Figure 12 is Fig. 8 medium-long range monitoring device structural schematic diagrams；
Figure 13 is clip junction structural schematic diagram in Figure 12.
In figure, 1- fixing hoop heads, 2- Step Shafts, 3- fixing hoops, 4- compressed springs, 5- movement clips, 6- mobile cards
Bind round head, 7- upshift electromagnet connection sheets, 8- downshift electromagnet connection sheets, 9- sliding slots, 10- screws one, 11- screws two, 12- electromagnetism
Iron one, 13- electromagnet two, the 14- upshift left line terminals of electromagnet, the 15- upshift right line terminals of electromagnet, 16- downshift electromagnet are left
Line terminals, the 17- downshift right line terminals of electromagnet, 18- movable cores one, 19- movable cores two, 20- control lines, 22- upshifts are pressed
Button switch, 23- down-shift buttons switch, 24- lifting shelves button panels, 25- upshift buttons, 26- down-shift buttons, 27- grip dress
It sets, 28- guide rods, 29- pilot holes, 30- baffles, 31- holding screws.
Specific implementation mode
Below in conjunction with the accompanying drawings and invention is described further in specific embodiment.
As shown in Fig. 1~Figure 13, a kind of direct current resistance of large transformer device for quick testing, including high-pressure side test module
With low-pressure side test module, high-pressure side test module current sampling resistor RN, transformer A, B, C three-phase star winding A, B,
C-terminal is distinguished series current sample resistance RN, current sampling resistor RN and is formed per mutually tested winding resistance RX with tested winding
Series connection bleeder circuit is connected respectively to voltmeter VAN, electricity at the both ends current sampling resistor RN of transformer A, B and C three-phase concatenation
Table V BN and voltmeter VCN is pressed, being tested the both ends winding resistance RX in transformer A, B and C three-phase is connected respectively to voltmeter VAX, electricity
Table V BX and voltmeter VCX is pressed, series connection bleeder circuit is concatenated on constant-current source；Low-pressure side test module includes controller, multichannel
Relay and Current Voltage test module, controller are connected to relay and Current Voltage test module, and relay is per two, road
Port is connected to the star-like side ABC phase windings of transformer high-voltage, low pressure triangle side abc phase windings and power supply, using same-phase and
The high-voltage winding magnetic assist of same polarity, controller are also connected to display screen.
Relay includes 12 tunnel 1S, 2S, 3S, 4S, 3S, 6S, 7S, 8S, 9S, 10S, 11S and 12S, and 1S, 3S and 5S can divide
Positive pole is not connected with A phases, B phases with C, a phases that A phases can be separately connected by 2S, 4S, 6S with 8S, 10S and 12S respectively,
B phases are connected with c, and power cathode can be connected with a phases, b phases with c by 7S, 9S respectively with 11S.
High-pressure side test module further includes a kind of to transformer on-load voltage regulating mechanism long-distance operating device, including electromagnet one
12 and electromagnet 2 13, electromagnet 1 and electromagnet 2 13 are fixedly connected on lifting shelves button panel 24, electromagnet 1
The movable core 2 19 of movable core 1 and electromagnet 2 13 distinguishes 25 He of upshift button on face lifting shelves button panel 24
Down-shift button 26, using two electromagnet movable core respectively face high voltage side of transformer star winding carry out loaded tap-off open
Electromagnet is connected to and remotely carries out control lifting shelves, realizes by the upshift button and down-shift button of shutting mechanism case pressure regulation gear shift
Long-range operation, efficiently solve the ergonomic that transformer winding direct current resistance m easurem ent is brought at present in the prior art it is low,
Operating risk is high, time-consuming and the influence problem to test data, the accuracy of guarantee test data, reduces operating risk, carries
High operation work efficiency, it is ensured that the person and equipment safety.
Electromagnet 1 and electromagnet 2 13 are connected respectively to upshift button switch 22 and down-shift button by control line 20
Switch 21, upshift button switch 22 and down-shift button switch 21 are connected to power supply 23, are pressed by the upshift of long-range connection power supply
Button switch and down-shift button switch, can conveniently and efficiently carry out a liter downshift operation, control is simple, easy to maintain.
Electromagnet 1 and electromagnet 2 13 are connected to by clamping and fixing device 27 on lifting shelves button panel 24, electromagnet
One 12 connecting terminal is the left line terminals 14 of upshift electromagnet and the upshift right line terminals 15 of electromagnet, the terminals of electromagnet 2 13
Son is the left line terminals 16 of downshift electromagnet and the downshift right line terminals 17 of electromagnet, and clamping and fixing device 27 includes dismountable clamping
Mechanism and fixed mechanism mounted on clamping device bottom pass through dismountable gripper mechanism grips and lift shelves button panel, use
Electromagnet is fixedly connected by fixing device, realizes being rapidly assembled and disassembled for electromagnet, greatly improves experimental test effect
Rate.
Clamping device includes tetragonal body shape fixing hoop 3 and the mobile clip 5 of bar shaped, and the setting of 3 upper surface of fixing hoop is solid
Determine hoop 1, guide rod 28, fixing hoop head 1 and shifting is arranged in the mobile hoop 6 of 5 upper surface of mobile clip setting and left side
Dynamic hoop 6 forms oat tail groove structure, and mobile clip 5 is telescopically connected to 3 right side of fixing hoop by guide rod 28 and leads
Into hole 29, compressed spring 4 is provided in pilot hole 29,4 both ends of compressed spring are born against in 28 end Step Shaft 2 of guide rod
On the upper and baffle 30 in 29 aperture of pilot hole, the compressed spring connected by your guide rod, by fixing hoop head and mobile clip
Head carries out tension and compression to lifting shelves button panel and fixes, easy to loading and unloading quick, is suitable for the lifting shelves button panel of different in width size
Installation, and it is simple in structure, and fixed, upper and lower position is easy to adjust on lifting shelves button panel, ensures the movable iron of electromagnet
The position of core is accurate.
Fixed mechanism includes two sliding slots 9 of channel steel shape and the upshift electromagnet connection sheet 7 of two pairs of L-types and downshift electromagnet
Connection sheet 8 is symmetrically fixedly connected on fixing hoop 3 before and after two sliding slots 9, the groove face opposite installation of two sliding slots 9, Mei Duisheng
Shelves electromagnet connection sheet 7 and 8 short side of downshift electromagnet connection sheet are entrenched in sliding slot, and are fixed using holding screw 31, each pair of
Upshift electromagnet connection sheet 7 and 8 long side of downshift electromagnet connection sheet are fixedly connected on electromagnet 1 and electromagnet 2 13, are led to
The connection sheet for crossing L-type is moved on the chute so that left and right position is easy to adjust on lifting shelves button panel, ensures that electromagnet can
The position of dynamic iron core is accurate, and easy to loading and unloading quick, connection is reliable, registration.
Operating process：Power supply 23 takes the self-test instrument power supply that high voltage side of transformer star winding D.C. resistance is tested, and makes
When with upshift operation, 23 are powered on, clicking upshift button switch 22 makes its normal opened contact connect, and power supply passes through control line 20
The coil of the connected electromagnet 1 with movable core 1 is set to charge, one 18 top pressure load ratio bridging switch mechanism of movable core
The upshift button on lifting shelves button panel in case, completes the upshift operation to load ratio bridging switch；When using downshift operation,
Power on 23, clicking down-shift button switch 21 makes its normal opened contact connect, and power supply makes connected band can by control line 20
The coil of the electromagnet 2 13 of dynamic iron core 2 19 charges, the lifting shelves in 2 19 top pressure load ratio bridging switch mechanism case of movable core
Down-shift button on button panel completes the downshift operation to load ratio bridging switch.
It is a kind of to transformer on-load voltage regulating mechanism long-distance operating device, further include video monitor 32, video monitor 32
It is connected to camera 33 by cable, camera 33 is mounted at lifting shelves button panel 24, and face lifts on shelves button panel 24
Gear indicator light 39 is connected with clip 34 on camera 33, and clip 34 is fixed on lifting shelves by detachable movable mountings
On button panel 24, camera 33 is connected to clip 34 by direction flexible 35, and clip 34 includes two clamping pieces 36 and torsional spring 37, and two
Clamping piece 36 is symmetrically installed by rotary shaft 38, and torsional spring 37 is socketed in rotary shaft 38, and 37 liang of free ends of torsional spring are resisted against two
Clamping piece 36 presses part interior.
Embodiment 1：In the test module of high-pressure side, after the test electric current of constant-current source inputs three-phase windings in parallel simultaneously,
Test electric current generates a sampled voltage VN on the sampling resistor RN on transformer A, B, C phase winding respectively, in subject winding electricity
A voltage VX is generated on resistance RX, according to the resistance value of known sample resistance RN, by following series resistance voltage division formulas, by counting
Calculate the DC resistance RX that circuit count goes out each phase winding：
It is known resistance value, RN and every phase by the way that the three-phase of transformer star winding is concatenated resistance a RN, RN respectively
Tested winding resistance RX forms partial pressure, measures the voltage at the both ends RN and RX respectively by voltmeter, you can RX is acquired, because using three
It is measured when identical, transformer neutral point lead portion is included in test loop, while whether just also demonstrating neutral point lead
Often, whether normal solve the country at present can not verify neutral point lead, it is also necessary to press using under triple channel principle test mode
The drawbacks of uniphase mode is per a data are mutually at least verified, due to being three-phase while testing, and synthesis caused by each phase current
Magnetic flux is zero, and curent change transient process shortens dramatically, when one transformer whole gear testing time of completion is single-phase test
Between 1/3, testing efficiency greatly improves, time saving and energy saving, while it is consistent per phase winding temperature to measure guarantee, substantially increases test
Precision and reliability reduce the use of contact, reduce mechanical wear, reduce the oxidation film of tap changer contact to three-phase
The influence of the degree of balance, the service life is longer.
Embodiment 2：In low-pressure side test module, when carry out Rac D.C. resistances test when, by the star-like A, B in main transformer high-pressure side,
C and main transformer low-pressure side a, b, c are connected to corresponding terminal in figure below by p-wire, connect test power supply.Pass through programmable control
Device processed drives controlled member relay.Start measuring loop, contact 1s-4s-6s-8s-11s is connected at this time, and DC power supply passes through
The contact that closure is flowed through in positive (+) reaches cathode (-), completes the measurement of Rac.Actual test circuit relay junction circuit knot
Structure schematic diagram is as shown in Fig. 5, and test current flow paths are：(+)-(1s)-(A phase windings)-(BC be in parallel winding)-
(4s6s) -8s-a phase windings-b phase windings-c phase windings-(-).
Embodiment 3：In low-pressure side test module, when carry out Rab D.C. resistances test when, by the star-like A, B in main transformer high-pressure side,
C and main transformer low-pressure side a, b, c are connected to corresponding terminal in figure below by p-wire, connect test power supply.Pass through programmable control
Device processed drives controlled member relay, starts measuring loop, and contact 3s-2s-6s-7s-10s is connected at this time, and DC power supply passes through
The contact that closure is flowed through in positive (+) reaches cathode (-), completes the measurement of Rab, actual test circuit relay junction circuit knot
Structure schematic diagram is as shown in Fig. 6, and test current flow paths are：(+)-(3s)-(B phase windings)-(AC be in parallel winding)-
(2s6s) -10s-b phase windings-c phase windings-a phase windings-(-).
Embodiment:4：When carrying out the test of Rbc D.C. resistances, by main transformer high-pressure side star-like A, B, C and main transformer low-pressure side a,
B, c is connected to corresponding terminal in figure below by p-wire, connects test power supply.By programmable controller, controlled member is driven
Part relay starts measuring loop, and contact 5s-2s-4s-9s-12s is connected at this time, and DC power supply flows through closure by positive (+)
Contact reach cathode (-), complete the measurement of Rbc, actual test circuit relay junction electrical block diagram such as attached drawing 7
Shown, test current flow paths are：(+)-(5s)-(C phase windings)-(AB be in parallel winding)-(2s4s) -12s-a
Phase winding-c phase windings-b phase windings-(-).
Embodiment 5：A kind of test method of direct current resistance of large transformer device for quick testing, this method include following step
Suddenly：
(1) high-pressure side D.C. resistance is tested：The corresponding ammeter voltmeter of tester is connected by high-pressure side test module
It is connected to high voltage side of transformer, and distinguishes series current sample resistance RN in A, B of transformer A, B, C three-phase star winding, C-terminal,
Current sampling resistor RN forms bleeder circuit of connecting, current voltmeter test with tested winding per winding resistance RX is mutually tested
Per phase RN both end voltages and electric current, you can measure every phase resistance：Calculation formula is as follows；
(2) low-pressure side D.C. resistance is tested：The corresponding ammeter voltmeter of tester is connected by low-pressure side test module
It is connected to step down side, the difference that multicircuit relay realizes high-pressure side winding and low-pressure side winding is automatically controlled by controller
The break-make in path, and circuit is connected to power supply, using the high-voltage winding magnetic assist of same-phase and same polarity, you can measure low-pressure side
Per phase resistance, result can be shown on display screen by controller calculating.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Within protection scope of the present invention, therefore, protection scope of the present invention should be based on the protection scope of the described claims lid.
Claims (9)
1. a kind of direct current resistance of large transformer device for quick testing, it is characterised in that：Including high-pressure side test module and low pressure
Side test module, high-pressure side test module include current sampling resistor RN, in A, B, C of transformer A, B, C three-phase star winding
Series current sample resistance RN, current sampling resistor RN are tested winding resistance RX group bunchiness with tested winding per phase respectively at end
Join bleeder circuit, voltmeter VAN, voltage are connected respectively at the both ends current sampling resistor RN of transformer A, B and C three-phase concatenation
Table V BN and voltmeter VCN is tested the both ends winding resistance RX in transformer A, B and C three-phase and is connected respectively to voltmeter VAX, voltage
Series connection bleeder circuit is concatenated on constant-current source by Table V BX and voltmeter VCX；Low-pressure side test module include controller, multichannel after
Electric appliance and Current Voltage test module, controller are connected to relay and Current Voltage test module, and controller is also connected to aobvious
Display screen, relay are connected to the star-like side ABC phase windings of transformer high-voltage, low pressure triangle side abc phase windings per the road ports Liang Ge
And power supply, specific connection type are：Relay includes 1S, 2S, 3S, 4S, 5S, 6S, 7S, 8S, 9S, 10S, 11S and 12S 12
Positive pole can be connected with A phases, B phases with C by road, 1S, 3S and 5S respectively, and the one end 2S connects A phases, and the one end 4S connects B phases, 6S
One end connect C phases, the one end 8S connect a phases, the one end 10S connect b phases, the one end 12S connect c phases, and the 2S other ends, the 4S other ends,
The 6S other ends, the 8S other ends, the 10S other ends and the 2S other ends are interconnected, and 7S, 9S and 11S can be respectively by power cathodes and a
Phase, b phases are connected with c.
2. a kind of direct current resistance of large transformer device for quick testing according to claim 1, it is characterised in that：High-pressure side
Test module further includes a kind of to transformer on-load voltage regulating mechanism long-distance operating device, which includes electromagnet one (12) and electricity
Magnet two (13), electromagnet one (12) and electromagnet two (13) are fixedly connected on lifting shelves button panel (24), electromagnet one
(12) movable core two (19) of movable core one (18) and electromagnet two (13) is respectively on face lifting shelves button panel (24)
Upshift button (25) and down-shift button (26).
3. a kind of direct current resistance of large transformer device for quick testing according to claim 2, it is characterised in that：Electromagnet
One (12) and electromagnet two (13) are connected respectively to upshift button switch (22) and down-shift button switch by control line (20)
(21), upshift button switch (22) and down-shift button switch (21) are connected to power supply (23).
4. a kind of direct current resistance of large transformer device for quick testing according to claim 2, it is characterised in that：Electromagnet
One (12) and electromagnet two (13) are connected to by clamping and fixing device (27) on lifting shelves button panel (24), clamping and fixing device
(27) include dismountable clamping device and the fixed mechanism mounted on clamping device bottom.
5. a kind of direct current resistance of large transformer device for quick testing according to claim 4, it is characterised in that：Clamping machine
Structure includes tetragonal body shape fixing hoop (3) and the mobile clip (5) of bar shaped, and fixing hoop head is arranged in fixing hoop (3) upper surface
(1), the mobile hoop (6) of mobile clip (5) upper surface setting and left side setting guide rod (28), fixing hoop head (1) and
Mobile hoop (6) forms oat tail groove structure, and mobile clip (5) is telescopically connected to fixing hoop by guide rod (28)
(3) in right side pilot hole (29), it is provided with compressed spring (4) in pilot hole (29), compressed spring (4) both ends are born against
On guide rod (28) end Step Shaft (2) and on the baffle (30) in pilot hole (29) aperture.
6. a kind of direct current resistance of large transformer device for quick testing according to claim 2, it is characterised in that：Fixed machine
Structure include channel steel shape two sliding slots (9) and two pairs of L-type connection sheets (7,8), two sliding slots (9) are front and back to be symmetrically fixedly connected on
On fixing hoop (3), the groove face opposite of two sliding slots (9) is installed, and each pair of connection sheet (7,8) short side is entrenched in sliding slot, and is used
Holding screw (31) is fixed, and each pair of connection sheet (7,8) long side is fixedly connected on electromagnet one (12) and electromagnet two (13).
7. a kind of direct current resistance of large transformer device for quick testing according to claim 2, it is characterised in that：Further include
Video monitor (32), video monitor (32) are connected to camera (33) by cable, and camera (33) is mounted on lifting shelves
At button panel (24), face lifts the gear indicator light (39) on shelves button panel (24).
8. a kind of direct current resistance of large transformer device for quick testing according to claim 7, it is characterised in that：Camera
(33) clip (34) is connected on, clip (34) is fixed on by detachable movable mountings on lifting shelves button panel (24),
Camera (33) is connected to clip (34) by direction flexible (35).
9. according to a kind of test method of any direct current resistance of large transformer device for quick testing of claim 1-8,
It is characterized in that：This approach includes the following steps：
(1) high-pressure side D.C. resistance is tested：The corresponding ammeter voltmeter of tester is connected to by high-pressure side test module
High voltage side of transformer, and distinguish series current sample resistance RN, electric current in A, B of transformer A, B, C three-phase star winding, C-terminal
Sample resistance RN forms bleeder circuit of connecting with tested winding per winding resistance RX is mutually tested, and current voltmeter test is per phase
RN both end voltages and electric current, you can measure every phase resistance：Calculation formula is as follows；
(2) low-pressure side D.C. resistance is tested：The corresponding ammeter voltmeter of tester is connected to by low-pressure side test module
Step down side automatically controls multicircuit relay by controller and realizes high-pressure side winding path different from low-pressure side winding
Break-make, and circuit is connected to power supply, you can measure low-pressure side per phase resistance, result can be shown by controller calculating
Onto display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610223339.7A CN105842541B (en) | 2016-04-12 | 2016-04-12 | A kind of direct current resistance of large transformer device for quick testing and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610223339.7A CN105842541B (en) | 2016-04-12 | 2016-04-12 | A kind of direct current resistance of large transformer device for quick testing and test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105842541A CN105842541A (en) | 2016-08-10 |
| CN105842541B true CN105842541B (en) | 2018-09-21 |
Family
ID=56597306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610223339.7A Active CN105842541B (en) | 2016-04-12 | 2016-04-12 | A kind of direct current resistance of large transformer device for quick testing and test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105842541B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107462788A (en) * | 2017-07-17 | 2017-12-12 | 广西电网有限责任公司电力科学研究院 | A kind of method of testing of 500kV auto-transformers D.C. resistance |
| CN108535549A (en) * | 2018-06-11 | 2018-09-14 | 保定市力兴电子设备有限公司 | A kind of hand-held three-phase transformer instrument for measuring DC resistance |
| CN111337750B (en) * | 2020-02-11 | 2021-12-21 | 深圳供电局有限公司 | Method and device for synchronously testing direct resistance of three-phase winding of cable outgoing type transformer |
| CN112748371B (en) * | 2020-12-18 | 2024-03-12 | 国网福建省电力有限公司检修分公司 | General test structure for multiple test items of transformer test and logic control method |
| CN113391131B (en) * | 2021-08-03 | 2022-07-15 | 山东双益电气有限责任公司 | Resistance testing device and method for dry-type transformer tapping winding |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2192040Y (en) * | 1994-04-26 | 1995-03-15 | 胡维祥 | Precise quick measuring ohmmeter for testing direct impedance of wide measuring range transformer |
| CN1124846A (en) * | 1994-10-26 | 1996-06-19 | 华北电力学院 | Dynamic measuring method and apparatus for D.C. resistance of power transformer |
| CN202093095U (en) * | 2011-06-09 | 2011-12-28 | 上海市电力公司 | Direct-current resistance tester for transformer |
| CN202351328U (en) * | 2011-11-03 | 2012-07-25 | 杭州高电科技有限公司 | Three-channel direct-current resistance tester |
| CN102759662A (en) * | 2012-07-09 | 2012-10-31 | 中国长江三峡集团公司 | Method for measuring DC (Direct Current) resistances of transformer windings |
| CN102866299A (en) * | 2011-07-08 | 2013-01-09 | 保定市金源科技有限公司 | Method for testing direct-current resistance of transformer |
| CN103884915A (en) * | 2014-02-27 | 2014-06-25 | 国家电网公司 | Device and method for automatically measuring direct-current resistance of windings of power transformers |
| CN203674127U (en) * | 2013-12-30 | 2014-06-25 | 广东电网公司中山供电局 | Switchgear breaker opening system |
| CN204705672U (en) * | 2015-04-23 | 2015-10-14 | 国家电网公司 | A kind of automatic gear shifting phase-change Transformer Winding direct current resistance proving installation |
| CN205506941U (en) * | 2016-04-12 | 2016-08-24 | 贵州电网有限责任公司都匀供电局 | Quick testing arrangement of large -scale transformer direct current resistance |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9581637B2 (en) * | 2011-05-17 | 2017-02-28 | Haefely Test Ag | Apparatus and method for testing winding resistances of transformers based on an inductive voltage drop |
-
2016
- 2016-04-12 CN CN201610223339.7A patent/CN105842541B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2192040Y (en) * | 1994-04-26 | 1995-03-15 | 胡维祥 | Precise quick measuring ohmmeter for testing direct impedance of wide measuring range transformer |
| CN1124846A (en) * | 1994-10-26 | 1996-06-19 | 华北电力学院 | Dynamic measuring method and apparatus for D.C. resistance of power transformer |
| CN202093095U (en) * | 2011-06-09 | 2011-12-28 | 上海市电力公司 | Direct-current resistance tester for transformer |
| CN102866299A (en) * | 2011-07-08 | 2013-01-09 | 保定市金源科技有限公司 | Method for testing direct-current resistance of transformer |
| CN202351328U (en) * | 2011-11-03 | 2012-07-25 | 杭州高电科技有限公司 | Three-channel direct-current resistance tester |
| CN102759662A (en) * | 2012-07-09 | 2012-10-31 | 中国长江三峡集团公司 | Method for measuring DC (Direct Current) resistances of transformer windings |
| CN203674127U (en) * | 2013-12-30 | 2014-06-25 | 广东电网公司中山供电局 | Switchgear breaker opening system |
| CN103884915A (en) * | 2014-02-27 | 2014-06-25 | 国家电网公司 | Device and method for automatically measuring direct-current resistance of windings of power transformers |
| CN204705672U (en) * | 2015-04-23 | 2015-10-14 | 国家电网公司 | A kind of automatic gear shifting phase-change Transformer Winding direct current resistance proving installation |
| CN205506941U (en) * | 2016-04-12 | 2016-08-24 | 贵州电网有限责任公司都匀供电局 | Quick testing arrangement of large -scale transformer direct current resistance |
Non-Patent Citations (3)
| Title |
|---|
| 助磁法测量变压器直流电阻的应用研究;袁燕岭 等;《电气技术》;20101231(第2期);第30-34页 * |
| 变压器直流电阻助磁法测量转换开关的设计;卞颖慧 等;《湖北工业大学学报》;20120229;第27卷(第1期);第51-53、91页 * |
| 大型电力变压器低压侧绕组直流电阻测试新方法;梁志瑞 等;《电力自动化设备》;20070630;第27卷(第6期);第27-30页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105842541A (en) | 2016-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105842541B (en) | A kind of direct current resistance of large transformer device for quick testing and test method | |
| CN105044479B (en) | Large Oil immersion transformer is empty, loads test complex and method | |
| CN105974348B (en) | Low-voltage current mutual inductor comprehensive detection system and its method | |
| CN203101622U (en) | Testing system for 220 V output voltage multi-output voltage mutual inductor | |
| CN101782638B (en) | Calibration device and method capable of measuring multiple current transformers once | |
| CN108847078A (en) | A kind of dress table connects electric training system | |
| CN205506941U (en) | Quick testing arrangement of large -scale transformer direct current resistance | |
| CN105116181A (en) | Voltage step device and mining direct current power supply detection device | |
| CN206627610U (en) | A kind of Portable mutual inductor detection means | |
| CN208985418U (en) | Dress table connects electric Simulated training device | |
| CN205506943U (en) | Three winding direct current resistance test circuit on simultaneous measurement transformer star type | |
| CN209417960U (en) | It corrects errors with wiring and connects electric actual training device with the dress table of fabrication evaluation | |
| CN206788229U (en) | A kind of high-low pressure switch | |
| CN107576906A (en) | A kind of portable relay checking platform and its application method | |
| CN206387827U (en) | DC Resistance Test of Transformer wiring boxcar | |
| CN202903927U (en) | Complete-set comprehensive test bench | |
| CN203705524U (en) | Universal multifunctional integrated comprehensive test bench | |
| CN202887569U (en) | Transformation simulation device of transformer winding | |
| CN202563014U (en) | Transformer loss measurement control console | |
| CN204694808U (en) | A kind of vertical high-frequency transformer measurement jig | |
| CN200968985Y (en) | Three-phase electrical energy meter calibration testing device | |
| CN210835078U (en) | Integrated testing device for direct current resistance test and transformation ratio test | |
| CN104065076B (en) | It is a kind of that temperature rise test is counter send electric power system | |
| CN205539430U (en) | Hall principle current transformer detection platform | |
| CN206114712U (en) | A tapping switch controller for on -load voltage -regulating transformer DC resistance measuring |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |