CN105866475A - Auxiliary wiring apparatus for testing direct current resistor in transformer and testing method - Google Patents
Auxiliary wiring apparatus for testing direct current resistor in transformer and testing method Download PDFInfo
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- CN105866475A CN105866475A CN201610180327.0A CN201610180327A CN105866475A CN 105866475 A CN105866475 A CN 105866475A CN 201610180327 A CN201610180327 A CN 201610180327A CN 105866475 A CN105866475 A CN 105866475A
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- relay
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention relates to an auxiliary wiring apparatus for testing a direct current resistor of a transformer and a testing method. The apparatus is configured such that: the apparatus includes a testing terminal which is intended for connecting a phase, b phase, and c phase of a secondary winding of a three-phase transformer, also includes a control one-chip microcomputer and replays which are connected to the control one-chip microcomputer; the testing terminal has a positive end and a negative end which are in parallel connection to four branches each of which is in series to two relays. The four branches are separate in parallel connection an phase A, phase B, phase C, and phase O of a first winding of the three-phase transformer. According to the invention, the one-chip microcomputer controls the on and off states of the replays so as to change testing methods of wiring. Time for charging a winding to be tested is maximally reduced in the course of testing the direct current resistor in the transformer, which makes the entire testing process of large-scale transformers "controllable, control enabling, control in process". Actual maintenance and testing time of the transformer can be greatly reduced. Maintenance quota time of a power transmission and transformation main device is shortened fundamentally. Reliability of grid devices is increased. Manpower and material resources are saved.
Description
Technical field
The present invention relates to transformer technology field, survey particularly to a kind of DCR of Transformer
Examination auxiliary connection device and method of testing.
Background technology
Field statistics calculates and finds, main transformer low-pressure side (the delta connection side of a 110kV
Formula) mean test time of D.C. resistance needs 1-2 hour, according to " power transmission and transformation main equipment
Size repaiies the notice of quota time " the maintenance ration standard that specifies, the main transformer of a 110kV
The interruption maintenance quota time is 11 hours, deducts transformator light maintenance and tears setting up time open, completing
The actual time of electrical test is also short about 3 hours, and only low-pressure side D.C. resistance is surveyed
Examination just accounted for 1/3 test period.
Improve direct current resistance of large transformer method of testing, reduce testing time, raising test
Efficiency is to complete the key of task, during the test of existing DCR of Transformer by the quota time
Between method, such as: the test processs such as magnetic assist method, demagnetization method need wiring repeatedly, test speed
Degree is slow and need to provide bigger test electric current.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that a kind of transformer dc
Resistance test auxiliary connection device and method of testing, solve need in test process wiring repeatedly,
Test speed is slow and the problem that need to provide bigger test electric current.
The present invention solves it and technical problem is that and take techniques below scheme to realize:
A kind of DCR of Transformer test auxiliary connection device, including for connecting three phase transformations
Depressor Secondary Winding a, the calibrating terminal of b, c three-phase, control single chip computer and with described control
The relay that single-chip microcomputer is connected；It is connected in parallel four between described calibrating terminal positive pole and negative pole
Bar branch road, every branch road is connected in series two relays, and described four branch roads are respectively with three
The A phase of winding of phase transformer, B phase, C phase, O phase are connected.
And, described relay includes that first relay K the 1, second relay K the 2, the 3rd continues
Electrical equipment K3, the 4th relay K the 4, the 5th relay K the 5, the 6th relay K the 6, the 7th continue
Electrical equipment K7, the 8th relay K 8；The positive pole of described calibrating terminal respectively with the first relay K 1,
One end of second relay K the 2, the 3rd relay K the 3, the 4th relay K 4 is connected, institute
State first relay K the 1, second relay K the 2, the 3rd relay K the 3, the 4th relay K 4
The other end respectively with the 5th relay K 5, the 6th relay K 6, the 7th relay K 7,
One end of eight relay K 8 is connected, described 5th relay K the 5, the 6th relay K 6,
The other end of the 7th relay K the 7, the 8th relay K 8 is connected with the negative pole of calibrating terminal,
Described first relay K 1 and the common point of the 5th relay K 5, the second relay K 2 and
The common point of six relay K 6, the 3rd relay K 3 and the common point of the 7th relay K 7,
The common point of the 4th relay K 4 and the 8th relay K 8 respectively with three-phase transformer once around
The A phase of group, B phase, C phase, O phase are connected.
A kind of DCR of Transformer using DCR of Transformer test auxiliary connection device
Method of testing, comprises the following steps:
Step 1, DCR of Transformer is tested auxiliary connection device it is connected with tested transformator
Connecing, a phase be connected with calibrating terminal positive pole, b phase is connected with calibrating terminal negative pole, surveys
The D.C. resistance of examination three-phase transformer Secondary Winding ab；；
After step 2, the D.C. resistance of three-phase transformer Secondary Winding ab are completed, under inciting somebody to action
One Secondary Winding ac to be measured short circuit, makes b winding cancel out each other with the magnetic flux that c winding produces,
Residue a winding magnetic flux；
Step 3, a phase is connected with calibrating terminal positive pole, c phase and calibrating terminal negative pole phase
Connect, the D.C. resistance of test three-phase transformer Secondary Winding ac；
After step 4, the D.C. resistance of three-phase transformer Secondary Winding ac are completed, under inciting somebody to action
One Secondary Winding bc to be measured short circuit, makes a winding cancel out each other with the magnetic flux that b winding produces,
Residue c winding magnetic flux；
Step 5, b phase is connected with calibrating terminal positive pole, c phase and calibrating terminal negative pole phase
Connect, the D.C. resistance of test three-phase transformer Secondary Winding bc.
Advantages of the present invention and good effect be:
1, Three-Phase Transformer wiring is put together and is automatically controlled by control single chip computer by the present invention
Relay, it is achieved the free handoff functionality of three-phase transformer test pattern, it is to avoid on-the-spot test
The wiring process of middle complexity.
2, the present invention open and-shut mode by Single-chip Controlling relay, thus change wiring and survey
Examination mode, reduces tested winding in DCR of Transformer test process to greatest extent
Charging interval so that the whole process of the test of high-power transformer " controlled, can control, control ", pole
The big actual maintenance of minimizing transformator, test period, fundamentally shorten power transmission and transformation main equipment
The maintenance quota time, promote grid equipment reliability, use manpower and material resources sparingly.
3, the present invention has the paramagnetic test function of uniqueness, realizes the highest with less electric current
Test speed, improve the low-pressure side D.C. resistance testing efficiency of transformator triangular form connection,
Shorten transformator power off time, by the delta connection side D.C. resistance testing time by originally
Within 1-2 hour, be reduced to 0.5 hour.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the present invention；
Fig. 2 (a) is three-phase transformer Secondary Winding ab wiring test mode schematic diagram of the present invention；
Fig. 2 (b) is the wiring test mode principle of three-phase transformer Secondary Winding ac of the present invention
Figure；
Fig. 2 (c) is the wiring test mode principle of three-phase transformer Secondary Winding bc of the present invention
Figure.
Detailed description of the invention
Below in conjunction with accompanying drawing, the embodiment of the present invention is further described:
A kind of DCR of Transformer test auxiliary connection device, as it is shown in figure 1, include using
In connecting three-phase transformer Secondary Winding a, the calibrating terminal of b, c three-phase, control single chip computer
And eight relays being connected with described control single chip computer；Described relay includes that first continues
Electrical equipment K1, the second relay K the 2, the 3rd relay K the 3, the 4th relay K the 4, the 5th continue
Electrical equipment K5, the 6th relay K the 6, the 7th relay K 7 and the 8th relay K 8, described survey
Examination terminal positive pole respectively with first relay K the 1, second relay K the 2, the 3rd relay K 3,
One end of 4th relay K 4 is connected, described first relay K the 1, second relay K 2,
3rd relay K 3, the 4th relay K 4 the other end respectively with the 5th relay K 5,
One end of six relay K the 6, the 7th relay K the 7, the 8th relay K 8 is connected, described
5th relay K the 5, the 6th relay K the 6, the 7th relay K the 7, the 8th relay K 8
The other end is connected with the negative pole of calibrating terminal, described first relay K 1 and the 5th relay
The common point of K5, the second relay K 2 and the common point of the 6th relay K 6, the 3rd relay
Device K3 and the common point of the 7th relay K 7, the 4th relay K 4 and the 8th relay K 8
Common point be connected with the A phase of winding of three-phase transformer, B phase, C phase, O phase respectively
Connect.By the Comprehensive Control of single-chip microcomputer, the paramagnetic of ab, ac, bc is facilitated to switch and mutual
Short circuit discharges, and the switching of A0, B0, C0 test mode of wye connection.
Shown in the operation principle of the present invention such as Fig. 2 (a), Fig. 2 (b), Fig. 2 (c), when three
The D.C. resistance of phase transformer Secondary Winding ab (a+, b-) is completed, by be measured for the next one around
Group ac short circuit, makes b winding cancel out each other with the magnetic flux that c winding produces, remains a winding magnetic
Lead to, then carry out the D.C. resistance test of Secondary Winding ac (a+, c-), ac can be greatly reduced and survey
The charging interval of examination winding；With should the unidirectional current of three-phase transformer Secondary Winding ac (a+, c-)
Resistance is completed, and by next winding bc short circuit in winding to be measured, makes a winding produce with b winding
Raw magnetic flux is cancelled out each other, and remains c winding magnetic flux, then carries out Secondary Winding bc (b+, c-)
D.C. resistance test, can greatly reduce bc test winding charging interval.
A kind of DCR of Transformer method of testing, comprises the following steps:
Step 1, DCR of Transformer is tested auxiliary connection device it is connected with tested transformator
Connecing, a phase be connected with calibrating terminal positive pole, b phase is connected with calibrating terminal negative pole, surveys
The D.C. resistance of examination three-phase transformer Secondary Winding ab；
After step 2, the D.C. resistance of three-phase transformer Secondary Winding ab are completed, under inciting somebody to action
One Secondary Winding ac to be measured short circuit, makes b winding cancel out each other with the magnetic flux that c winding produces,
Residue a winding magnetic flux；
Step 3, a phase is connected with calibrating terminal positive pole, c phase and calibrating terminal negative pole phase
Connect, the D.C. resistance of test three-phase transformer Secondary Winding ac；
After step 4, the D.C. resistance of three-phase transformer Secondary Winding ac are completed, under inciting somebody to action
One Secondary Winding bc to be measured short circuit, makes a winding cancel out each other with the magnetic flux that b winding produces,
Residue c winding magnetic flux；
Step 5, b phase is connected with calibrating terminal positive pole, c phase and calibrating terminal negative pole phase
Connect, the D.C. resistance of test three-phase transformer Secondary Winding bc.
It is emphasized that embodiment of the present invention is illustrative rather than limits
Property, therefore the present invention includes the embodiment being not limited to described in detailed description of the invention, all
It is other embodiments drawn according to technical scheme by those skilled in the art,
Also belong to the scope of protection of the invention.
Claims (3)
1. a DCR of Transformer test auxiliary connection device, it is characterised in that: include
For connecting three-phase transformer Secondary Winding a, the calibrating terminal of b, c three-phase, controlling monolithic
Machine and the relay being connected with described control single chip computer；Described calibrating terminal positive pole and negative pole
Between be connected in parallel four branch roads, every branch road is connected in series two relays, described four
Bar branch road is connected with the A phase of winding of three-phase transformer, B phase, C phase, O phase respectively.
A kind of DCR of Transformer test auxiliary connection dress the most according to claim 1
Put, it is characterised in that: described relay include first relay K the 1, second relay K 2,
3rd relay K the 3, the 4th relay K the 4, the 5th relay K the 5, the 6th relay K 6,
7th relay K the 7, the 8th relay K 8；The positive pole of described calibrating terminal continues with first respectively
Electrical equipment K1, one end phase of the second relay K the 2, the 3rd relay K the 3, the 4th relay K 4
Connecting, described first relay K the 1, second relay K the 2, the 3rd relay K the 3, the 4th continues
The other end of electrical equipment K4 respectively with the 5th relay K the 5, the 6th relay K the 6, the 7th relay
Device K7, one end of the 8th relay K 8 are connected, and described 5th relay K the 5, the 6th continues
Electrical equipment K6, the other end of the 7th relay K the 7, the 8th relay K 8 and bearing of calibrating terminal
Pole is connected, and the common point of described first relay K 1 and the 5th relay K 5, second continues
Electrical equipment K2 and the common point of the 6th relay K 6, the 3rd relay K 3 and the 7th relay K 7
Common point, the 4th relay K 4 and the 8th relay K 8 common point respectively with three phase transformations
The A phase of winding of depressor, B phase, C phase, O phase are connected.
3. one kind uses DCR of Transformer as claimed in claim 1 test auxiliary connection dress
The DCR of Transformer method of testing put, it is characterised in that comprise the following steps:
Step 1, DCR of Transformer is tested auxiliary connection device it is connected with tested transformator
Connecing, a phase be connected with calibrating terminal positive pole, b phase is connected with calibrating terminal negative pole, surveys
The D.C. resistance of examination three-phase transformer Secondary Winding ab；；
After step 2, the D.C. resistance of three-phase transformer Secondary Winding ab are completed, under inciting somebody to action
One Secondary Winding ac to be measured short circuit, makes b winding cancel out each other with the magnetic flux that c winding produces,
Residue a winding magnetic flux；
Step 3, a phase is connected with calibrating terminal positive pole, c phase and calibrating terminal negative pole phase
Connect, the D.C. resistance of test three-phase transformer Secondary Winding ac；
After step 4, the D.C. resistance of three-phase transformer Secondary Winding ac are completed, under inciting somebody to action
One Secondary Winding bc to be measured short circuit, makes a winding cancel out each other with the magnetic flux that b winding produces,
Residue c winding magnetic flux；
Step 5, b phase is connected with calibrating terminal positive pole, c phase and calibrating terminal negative pole phase
Connect, the D.C. resistance of test three-phase transformer Secondary Winding bc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610180327.0A CN105866475A (en) | 2016-03-25 | 2016-03-25 | Auxiliary wiring apparatus for testing direct current resistor in transformer and testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610180327.0A CN105866475A (en) | 2016-03-25 | 2016-03-25 | Auxiliary wiring apparatus for testing direct current resistor in transformer and testing method |
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| Publication Number | Publication Date |
|---|---|
| CN105866475A true CN105866475A (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610180327.0A Pending CN105866475A (en) | 2016-03-25 | 2016-03-25 | Auxiliary wiring apparatus for testing direct current resistor in transformer and testing method |
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| CN (1) | CN105866475A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175577A (en) * | 2020-01-07 | 2020-05-19 | 云南铝业股份有限公司 | Method for detecting single-phase direct current resistance of in-phase and anti-parallel winding on secondary side of rectifier transformer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203606400U (en) * | 2013-12-04 | 2014-05-21 | 李庆才 | Transformer DC resistance measuring wiring converter |
| CN104749440A (en) * | 2015-04-03 | 2015-07-01 | 国家电网公司 | Large power transformer direct-current resistance fast testing method |
| CN105158565A (en) * | 2015-07-22 | 2015-12-16 | 国网山东省电力公司日照供电公司 | Auxiliary apparatus and method for fast testing DC resistance of large power transformer |
-
2016
- 2016-03-25 CN CN201610180327.0A patent/CN105866475A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203606400U (en) * | 2013-12-04 | 2014-05-21 | 李庆才 | Transformer DC resistance measuring wiring converter |
| CN104749440A (en) * | 2015-04-03 | 2015-07-01 | 国家电网公司 | Large power transformer direct-current resistance fast testing method |
| CN105158565A (en) * | 2015-07-22 | 2015-12-16 | 国网山东省电力公司日照供电公司 | Auxiliary apparatus and method for fast testing DC resistance of large power transformer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175577A (en) * | 2020-01-07 | 2020-05-19 | 云南铝业股份有限公司 | Method for detecting single-phase direct current resistance of in-phase and anti-parallel winding on secondary side of rectifier transformer |
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Application publication date: 20160817 |