CN201637799U - Rated load short circuit and temperature rise testing device of ultrahigh-capacity single-phase transformer - Google Patents
Rated load short circuit and temperature rise testing device of ultrahigh-capacity single-phase transformer Download PDFInfo
- Publication number
- CN201637799U CN201637799U CN2010201520693U CN201020152069U CN201637799U CN 201637799 U CN201637799 U CN 201637799U CN 2010201520693 U CN2010201520693 U CN 2010201520693U CN 201020152069 U CN201020152069 U CN 201020152069U CN 201637799 U CN201637799 U CN 201637799U
- Authority
- CN
- China
- Prior art keywords
- phase
- transformer
- output terminal
- input end
- regulator
- 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.)
- Expired - Fee Related
Links
Landscapes
- Control Of Electrical Variables (AREA)
Abstract
The utility model discloses a rated load short circuit and temperature rise testing device of an ultrahigh-capacity single-phase transformer. The device is characterized in that the input end of a three-phase power supply of the testing device is connected with the input end of a three-phase voltage regulator; a first output end of the three-phase voltage regulator is connected with one end of a balanced adjustable capacitor, and a second output end of the three-phase voltage regulator is connected with the other end of the balanced adjustable capacitor; the other end of the balanced adjustable capacitor is also connected with one end of a balanced adjustable reactor, and a third output end of the three-phase voltage regulator is connected with the other end of the balanced adjustable reactor; the first output end of the three-phase voltage regulator is connected with one input end of a matched transformer, and the third output end of the three-phase voltage regulator is connected with the other input end of the matched transformer; and two output ends of the matched transformer are respectively connected with two ends of a single-phase output end of the testing device. The utility model better solves the problems of unbalanced power supply and harmonic interference in the prior art and obviously reduces the investment scale of testing equipment and sites.
Description
Technical field:
The utility model relates to a kind of test unit of transformer, specifically a kind of vast capacity single transformer nominal load short circuit and temperature rise test device.
Background technology:
Be vast capacity three-phase transformer (the vast capacity single transformer here generally refers to the three-phase transformer of capacity greater than 250,000 KVA) transportation volume, tonnage that solves demand in extra-high pressure, the super large electrical network and the difficulty of making, manufacturer often adopts three single transformer combinations to form.This has become the scheme that present countries in the world super large transformer manufacturer must take.Although one is divided into three, this vast capacity single transformer still can bring serious three-phase imbalance to electrical network, and causes serious harmonic interference thus.Present most of ultra-large type transformer manufacturing plant has to testing equipment adopted increases the three-phase regulator capacity, the large-scale single-phase voltage regulating device of perhaps special order is perhaps established independent generator equipment in addition and is dealt with the trouble that this vast capacity single transformer test brings as special-purpose experiment power supply.As seen above-mentioned measure has expended huge investment, but at most can only a little improvement, does not tackle the problem at its root, and three-phase imbalance and harmonic interference still exist.Therefore, seek a kind of test unit, it can implement above-mentioned test, and can from principle with in fact the single-phase load of this vast capacity evenly share with three-phase supply on, bear this test with making the three phase network symmetrical balance, do not cause the harmonic interference that causes thus, can use pressure regulator again, overall investment is obviously reduced than low capacity.
Summary of the invention
The utility model purpose is to provide a kind of vast capacity single transformer nominal load short circuit and temperature rise test device.
In order to realize this purpose, the technical solution of the utility model is as follows: a kind of vast capacity single transformer nominal load short circuit and temperature rise test device, comprise three-phase power input end and single-phase output terminal, the three-phase power input end that it is characterized in that this test unit is connected with the input end of three-phase regulator, first output terminal of three-phase regulator is connected with an end of balance adjustable condenser, second output terminal of three-phase regulator is connected with the other end of balance adjustable condenser, the other end of balance adjustable condenser also is connected with an end of balance REgulatable reactor, the 3rd output terminal of three-phase regulator is connected with the other end of balance REgulatable reactor, first output terminal of three-phase regulator is connected with an input end of matching transformer, the 3rd output terminal of three-phase regulator is connected with another input end of matching transformer, and two output terminals of matching transformer are connected with the single-phase output terminal two ends of this test unit respectively.
Be provided with the first three-phase current table and the first three-phase voltage table between the three-phase power input end of this test unit and the input end of three-phase regulator, the output terminal of three-phase regulator is provided with the second three-phase current table and the second three-phase voltage table, be serially connected with the 3rd reometer between three-phase regulator first output terminal and the internal compensation adjustable condenser, be provided with the 4th reometer and the 4th voltage table between the single-phase output terminal of the secondary coil of matching transformer and this test unit.
During use, behind the single-phase output terminal of this test unit external compensation adjustable condenser in parallel, be connected with the input end of tested single transformer, the output terminal short circuit of tested single transformer connects, and the input end of tested single transformer is connected with the 5th reometer, the 5th voltage table and power meter.The input termination phase three-wire three fixed voltage of this test unit, and its output is single-phase adjustable experiment power supply, it is a test unit that can be used for the single transformer short-circuit test, its inside is provided with conventional three-phase regulator and regulates to adapt to wide range of voltages, and its inside is provided with balance adjustable condenser and balance REgulatable reactor, can keep the test unit of three-phase supply balance.Use this test unit, what try is single-phase ultra-large capacity transformer, but power supply and voltage adjusting device all are in the state of three-phase equilibrium, have solved the trouble of unborn unbalanced power supply and harmonic interference preferably, and have reduced testing equipment and place scale of investment significantly.This device also can be used on when the vast capacity single transformer carries out the device of oil heating for quickening oil strain in the short circuit mode in the super large power transmission and transformation station, can play the effect of three phase network symmetrical balance and reduction equipment capacity equally.
Description of drawings
Fig. 1 is a circuit diagram of the present utility model
Embodiment
Connection principle signal when test unit of the present utility model is implemented test as shown in Figure 1.T is a three-phase regulator among the figure, and PB is a matching transformer, and BB is tested vast capacity single transformer; C
B1For being used for the external compensation adjustable condenser of tested transformer BB short circuit reactive-load compensation; C
B2Internal compensation adjustable condenser for the reactive-load compensation that is used for matching transformer PB; C
BBe the balance adjustable condenser; L
BBe the balance REgulatable reactor; RD is the output voltage regulator fuse; V
1For showing the first three-phase voltage table of pressure regulator T input side voltage; A
1For showing the first three-phase current table of pressure regulator T input side electric current; V
2For showing the second three-phase voltage table of pressure regulator T outgoing side voltage, A
2For showing the second three-phase current table of pressure regulator T outgoing side electric current; A
3The 3rd reometer for the input current that shows matching transformer PB; V
4The 4th voltage table for the output voltage that shows matching transformer PB; A
4The 4th reometer for the output current that shows matching transformer PB; V
5For showing the short-circuit voltage U of tested transformer BB
KThe 5th voltage table; A
5For showing the short-circuit current I of tested single transformer BB
KThe 5th reometer; W
5Short circuit loss P for tested single transformer BB
KPower meter.
The three-phase power input end of this test unit is connected with the input end of three-phase regulator, first output terminal of three-phase regulator T and balance adjustable condenser C
BAn end connect second output terminal of three-phase regulator T and balance adjustable condenser C
BThe other end connect balance adjustable condenser C
BThe other end also with balance REgulatable reactor L
BAn end connect the 3rd output terminal of three-phase regulator T and balance REgulatable reactor L
BThe other end connect, first output terminal of three-phase regulator T is connected with the input end of matching transformer PB, the 3rd output terminal of three-phase regulator T is connected with another input end of matching transformer, and the input end of matching transformer also is parallel with internal compensation adjustable condenser C
B2, two output terminals of matching transformer PB respectively with the single-phase output terminal a of this test unit
4And c
4Connect.
From figure the wiring of tested transformer BB as can be known because the secondary two ends B of this tested transformer BB
3, X
3Direct short-circuit is when putting on tested transformer BB input end B
2, X
2Voltage progressively rise to the short-circuit voltage U of this tested transformer BB by three-phase regulator T
KThe time, the 5th reometer A
5, the 5th voltage table V
5With power meter W
5The short-circuit voltage U of this tested transformer will be shown
K, short-circuit current I
KWith short circuit loss P
KAs carry out temperature rise test, then should control the total losses ∑ Δ P that short circuit loss equals tested transformer BB, i.e. P
K=∑ Δ P.The external compensation adjustable condenser C that is used for the short circuit reactive-load compensation of tested transformer BB
B1Reactive current I when in fact having born tested transformer BB short circuit
KLThe role of supply source is through external compensation adjustable condenser C
B1Accurate fine setting, for the output terminal of matching transformer PB, almost just connect a pure resistive load.At this moment, the 4th voltage table V
4, the 5th voltage table V
5The voltage that shows is almost consistent, the 4th reometer A
4That show only is the real component I of tested transformer BB short-circuit current
KRBut be still a single-phase load here.The internal compensation adjustable condenser C that is used for matching transformer PB reactive-load compensation
B2Elementary in parallel with matching transformer PB, it is to the idle enforcement compensation of matching capacitor PB, makes the resistive purity of the output terminal a1 of pressure regulator T, load that c1 receives higher.Balance adjustable condenser C
BWith balance REgulatable reactor L
BCross-over connection is in pressure regulator output line voltage U respectively
Ta1-b1With U
Tb1-c1On, design makes their reactive capability
Through C
BWith L
BAccurate fine setting, can make the second three-phase current Table A of three-phase regulator T output terminal
2Three current value unanimities, and its size
(referring to short-circuit test) or
(referring to temperature rise test).At this moment, the short circuit loss of tested transformer BB is shared equably on the prime three-phase supply, so the pressure regulator input end first three-phase current Table A
1Three electric current displayed values almost consistent, its maximum degree of unbalancedness will be less than 5%.
For adapting to the transformer and the different U of different capabilities, different voltage specifications
K, I
K, P
K, ∑ Δ P value test, except that adopting conventional pressure regulator, matching transformer adopts two groups of secondary taps output (a
31-c
3, a
32-c
3) can select corresponding tap according to different needs, adjustable condenser and REgulatable reactor can adopt plurality of fixed shunt capacitance and inductance to drop into the mode that coarse adjustment mode and the level and smooth charged control capacittance of suitable capacity stepless continuous combine with the inductance fine tuning one by one, reach the purpose of accurate three-phase equilibrium, make the actual tests scope of application of this device wider.The inner R that uses
BRepresentative through the compensation after the single transformer short circuit load time, three output line voltages of three-phase regulator connect R successively by phase sequence respectively
B, tunable capacitor C
BWith controllable impedance L
B, i.e. R
B-C
B-L
BOr C
B-L
B-R
BOr L
B-R
B-C
B
This test unit is realized on principle in two steps: the first step, the a large amount of perception that need during with transformer nominal load short-circuit test are idle bears supply by capacitor, makes the prime experiment power supply almost only need to supply with the single-phase active resistance load of this super large capacitor total losses of transformer order of magnitude then; Second the step, again with this single-phase ohmic load by adjustable paralleing reactor and adjustable balancing capacitor effect, make single-phase resistance load balance symmetry share to three-phase regulator each phase on.This moment this three-phase regulator actual what bear is the load of three-phase symmetrical balance, and the rated capacity of this pressure regulator only is the loss value of this vast capacity single transformer.(concerning the nominal load short-circuit test, be the short circuit loss value of this transformer; To temperature rise test is the total losses value of this transformer.) by the present manufacture level of this vast capacity single transformer, this test pressure regulator rated capacity is about 0.8% of tested transformer capacity, and along with the development trend of ultra-low loss transformer, this surge capacity also will further reduce.Use this test unit, what try is single-phase ultra-large capacity transformer, but power supply and voltage adjusting device all are in the state of three-phase equilibrium, have solved the trouble of unborn unbalanced power supply and harmonic interference preferably, and have reduced testing equipment and place scale of investment significantly.
Three-phase regulator of the present utility model can be the pressure regulator of various types, comprises induction voltage regulator or pillar pressure regulator, changes core type pressure regulator etc., and output is all the near sinusoidal ripple, and each alternate phase differential is 120 degree.Adjustable condenser and REgulatable reactor can be with fixing idle devices, regulate with input or disconnect mode respectively, and also available continuous stepless smooth mode is regulated, and also can be both combinations.
Claims (4)
1. vast capacity single transformer nominal load short circuit and temperature rise test device, comprise three-phase power input end and single-phase output terminal, the three-phase power input end that it is characterized in that this test unit is connected with the input end of three-phase regulator, first output terminal of three-phase regulator is connected with an end of balance adjustable condenser, second output terminal of three-phase regulator is connected with the other end of balance adjustable condenser, the other end of balance adjustable condenser also is connected with an end of balance REgulatable reactor, the 3rd output terminal of three-phase regulator is connected with the other end of balance REgulatable reactor, first output terminal of three-phase regulator is connected with an input end of matching transformer, the 3rd output terminal of three-phase regulator is connected with another input end of matching transformer, and two output terminals of matching transformer are connected with the single-phase output terminal two ends of this test unit respectively.
2. test unit according to claim 1 is characterized in that: the input end of matching transformer also is connected in parallel with the internal compensation adjustable condenser.
3. test unit according to claim 1, it is characterized in that: be provided with the first three-phase current table and the first three-phase voltage table between the three-phase power input end of this test unit and the input end of three-phase regulator, the output terminal of three-phase regulator is provided with the second three-phase current table and the second three-phase voltage table, be serially connected with the 3rd reometer between three-phase regulator first output terminal and the internal compensation adjustable condenser, be provided with the 4th reometer and the 4th voltage table between the single-phase output terminal of the secondary coil of matching transformer and this test unit.
4. test unit according to claim 1, it is characterized in that: behind the single-phase output terminal of this test unit external compensation adjustable condenser in parallel, be connected with the input end of tested single transformer, the output terminal short circuit of tested single transformer connects, and the input end of tested single transformer is connected with the 5th reometer, the 5th voltage table and power meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201520693U CN201637799U (en) | 2010-04-07 | 2010-04-07 | Rated load short circuit and temperature rise testing device of ultrahigh-capacity single-phase transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201520693U CN201637799U (en) | 2010-04-07 | 2010-04-07 | Rated load short circuit and temperature rise testing device of ultrahigh-capacity single-phase transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201637799U true CN201637799U (en) | 2010-11-17 |
Family
ID=43082303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201520693U Expired - Fee Related CN201637799U (en) | 2010-04-07 | 2010-04-07 | Rated load short circuit and temperature rise testing device of ultrahigh-capacity single-phase transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201637799U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103354362A (en) * | 2013-06-28 | 2013-10-16 | 洛阳恒光特种变压器有限公司 | Method for solving problem of unstable electrical network caused by experiment |
| CN104597363A (en) * | 2013-10-31 | 2015-05-06 | 南通富士特电力自动化有限公司 | Capacitor testing device and capacitor testing method |
| CN107144758A (en) * | 2017-05-25 | 2017-09-08 | 云南电网有限责任公司电力科学研究院 | The test method that a kind of fuel factor influences on transformer anti-short circuit capability |
| CN109541339A (en) * | 2018-10-26 | 2019-03-29 | 苏州华电电气股份有限公司 | Power transformer bears short-circuit capacity pilot system |
-
2010
- 2010-04-07 CN CN2010201520693U patent/CN201637799U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103354362A (en) * | 2013-06-28 | 2013-10-16 | 洛阳恒光特种变压器有限公司 | Method for solving problem of unstable electrical network caused by experiment |
| CN104597363A (en) * | 2013-10-31 | 2015-05-06 | 南通富士特电力自动化有限公司 | Capacitor testing device and capacitor testing method |
| CN107144758A (en) * | 2017-05-25 | 2017-09-08 | 云南电网有限责任公司电力科学研究院 | The test method that a kind of fuel factor influences on transformer anti-short circuit capability |
| CN107144758B (en) * | 2017-05-25 | 2020-02-07 | 云南电网有限责任公司电力科学研究院 | Method for testing influence of thermal effect on short-circuit resistance of transformer |
| CN109541339A (en) * | 2018-10-26 | 2019-03-29 | 苏州华电电气股份有限公司 | Power transformer bears short-circuit capacity pilot system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201637799U (en) | Rated load short circuit and temperature rise testing device of ultrahigh-capacity single-phase transformer | |
| CN102360857B (en) | Integrated network distributing transformer with error compensating mutual inductor | |
| CN104752043A (en) | Voltage regulating method for three-phase loaded voltage-regulating self-coupling transformer | |
| CN112289570B (en) | Edge-extended triangular autotransformer | |
| CN109637792B (en) | Test transformer | |
| CN100479074C (en) | Star-ladder type wiring three-phase to two phase balance transformer | |
| CN203536206U (en) | Adjustable loaded passive zero-flux single-turn core-through current transformer | |
| CN202929060U (en) | Linear load for uninterrupted power source test for electric power | |
| CN115356676A (en) | Phase line and zero line synchronous calibration method for single-phase ammeter | |
| CN202435047U (en) | Reactive power adjustable parallel reactor | |
| CN110365123B (en) | Compensation circuit of two-phase wireless charging system | |
| CN108923718A (en) | A kind of large power high efficiency energy-saving electric machine | |
| CN112821403B (en) | Single-phase or three-phase electromagnetic series type transmission line tidal current control topological circuit | |
| CN204068710U (en) | A kind of novel three port isolation type bipolar DC converters | |
| CN203216957U (en) | Multistage continuous adjustable hollow test reactor for low voltage ride-through testing device | |
| CN202004463U (en) | Dynamic reactive compensation controller based on digital signal processing (DSP) | |
| CN207731777U (en) | A kind of three-phase conducting wire shares the current-limiting reactor of magnet ring | |
| WO2001011751A1 (en) | Impedance-compensated power transmission circuit | |
| CN102638039B (en) | Three-phase chain-type static synchronous compensator | |
| CN201966047U (en) | Alternating-current series adjustable load | |
| CN102163493B (en) | Asymmetric connecting wire balancing transformer and implementation method thereof | |
| CN204666739U (en) | A kind of device adjustable transformer and compensator transformer being carried out simultaneously to temperature rise test | |
| Lee et al. | Combined compensation structure of an SVC and an active filter for unbalanced three phase distribution feeders with harmonic distortion | |
| CN209656812U (en) | A kind of transient recovery voltage and reactor, which shunt, shares regulating device | |
| CN104377017B (en) | On-load regulated capacity transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101117 Termination date: 20130407 |