CN206057431U - A kind of converter power transformer load loss and short-circuit impedance pilot system - Google Patents
A kind of converter power transformer load loss and short-circuit impedance pilot system Download PDFInfo
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- CN206057431U CN206057431U CN201620261657.8U CN201620261657U CN206057431U CN 206057431 U CN206057431 U CN 206057431U CN 201620261657 U CN201620261657 U CN 201620261657U CN 206057431 U CN206057431 U CN 206057431U
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Abstract
This utility model discloses a kind of converter power transformer load loss and short-circuit impedance pilot system, include variable-frequency power sources cabinet, intermediate transformer, compensating electric capacity tower, voltage transformer, current transformer and converter power transformer, the variable-frequency power sources cabinet conveys power supply to intermediate transformer, the A of intermediate transformer, B two ends are in parallel with compensating electric capacity tower, the A ends are also connected with the net side bushing of converter power transformer, B ends are connected with the earth terminal of converter power transformer, the first winding of current transformer TA is serially connected with the line between A ends and converter power transformer net side bushing, the two ends of the Secondary Winding of current transformer TA are connected on the current wiring terminal of a power analyzer；The first winding two ends of voltage transformer TV connect side a and b respectively, and the Secondary Winding two ends of voltage transformer TV are connected on the voltage wiring terminal of power analyzer.This utility model greatly reduce in anaplasia volume and the height of sleeve pipe, using the compensating electric capacity tower of demountable structure, conveniently can transport and in-site installation.
Description
Technical field
This utility model is related to technical field of electric power, and in particular to one kind can be in converter power transformer delivery test and scene inspection
Load loss and short-circuit impedance pilot system after repairing.
Background technology
At present, load loss of the domestic converter power transformer when dispatching from the factory and short-circuit impedance test are general using electromotor offer
The mode of power supply, its shortcoming are that electromotor fixed installation cannot move to scene and be tested, and electromotor runs dimension in itself
Shield is sufficiently complex.Load test after site examining and repairing is typically by the way of variable-frequency power sources, but domestic existing variable-frequency electric at present
Source formula complexes parameter, configurations, there is no the packaged type complexes suitable for the test of converter power transformer field load,
The problem of presence has variable-frequency power sources capacity not apply to, compensating electric capacity tower cannot move installation, middle transformation size cannot be transported greatly very much
It is defeated.
Utility model content
The purpose of this utility model is, for above-mentioned problems of the prior art, to propose that a kind of converter power transformer is born
Load-loss and short-circuit impedance pilot system, employ two low pressure winding of middle anaplasia parallel connection pressuring method, in greatly can reducing
The height of the volume and sleeve pipe of anaplasia, and dismantled and assembled superposing type compensating electric capacity tower is adopted, realization is conveniently transported and overcomes scene
With when transport difficult problem.
To reach the purpose of above-mentioned utility model, this utility model is achieved through the following technical solutions：
A kind of converter power transformer load loss and short-circuit impedance pilot system, include variable-frequency power sources cabinet, intermediate transformer,
Compensating electric capacity tower, voltage transformer, current transformer and converter power transformer, low pressure of the variable-frequency power sources cabinet to intermediate transformer
Side conveys alternating source, and the high pressure winding outfan of intermediate transformer is A ends, and high pressure winding tail end is B ends, A, B two ends and benefit
Repay capacitor tower in parallel, the A ends of the intermediate transformer are also connected with the net side bushing of converter power transformer, intermediate transformer
B ends are also connected with the earth terminal of converter power transformer, and the first winding of current transformer TA is serially connected with A ends and converter power transformer net side
On line between bushing, the two ends of the Secondary Winding of current transformer TA are connected to the electric current of a power analyzer and connect
In line terminals；The first winding two ends of voltage transformer TV connect side a and b, the Secondary Winding two of voltage transformer TV respectively
End is connected on the voltage wiring terminal of power analyzer.
Further, the low-pressure side of the intermediate transformer includes two coil windings, and two coil windings are connected in series
Or be connected in parallel.
Further, it is electric one to be concatenated on any one line between the Secondary Winding and power analyzer of current transformer TA
Current transformer, bridges a voltmeter between the two ends of the Secondary Winding of voltage transformer TV.
Further, described two coil windings are connected in parallel, then two coils are connect in voltage gear terminals and neutral point
Line end is in parallel；Described two coil windings are connected in series, then a coil windings are in neutral point and the voltage of another coil windings
Gear terminals are connected, and the respective free end of two coil windings connects variable-frequency power sources cabinet.
Further, the compensating electric capacity tower includes the dismountable capacitor bank of at least two-layer；Described further per layer
Capacitor bank rated voltage is 20kV.
Further, the input connection three-phase 10kV power supplys of the variable-frequency power sources cabinet, variable-frequency power sources cabinet output single-phase 30～
200Hz, the variable ratio frequency changer of 0～10kV and variable-voltage power supply.
Further, the intermediate transformer low-pressure side has tri- voltage gears of 8kV, 10kV, 12kV, high-pressure side have 20kV,
Many voltage gears of 40kV, 80kV.
Further, the voltage transformer TV summation current transformers TA is respectively 0.1 step voltage transformer and 0.01 grade electric
Current transformer.
A kind of converter power transformer load loss of the present utility model and short-circuit impedance pilot system, by using three-phase high-voltage
Variable-frequency power sources can be efficiently used power supply capacity, it is ensured that grid side three-phase power balance, and high-voltage variable frequency power source can complete frequency
The regulation of rate and voltage, compares the high usage that pressure regulator mode can accomplish steady, quick, safety and power supply.Using two
Intermediate transformer can effectively reduce equipment volume and sleeve pipe height, it is ensured that transportation safety, middle anaplasia arrange multiple voltage gears
The efficient utilization of the general and variable-frequency power sources power of polytype converter power transformer can be ensured.It is using dismountable, multivoltage, many
The adjustable reactive compensation capacitor tower of capacity can ensure that the accuracy of capacitance compensation, make whole circuit do not occur larger overcompensation and
Larger under-compensated situation, reassembling type can conveniently transport mobile and in-site installation.This device adopt 0.1 step voltage transformer and
0.01 grade of current transformer, measurement are accurate, and easy transportation and installation, are applied to experiment hall and scene is all more convenient.
Description of the drawings
Fig. 1 is the elementary diagram of converter power transformer load loss of the present utility model and short-circuit impedance pilot system.
Fig. 2 is the intermediate transformer principle of converter power transformer load loss of the present utility model and short-circuit impedance pilot system
Figure.
Fig. 3 is the compensating electric capacity tower principle of converter power transformer load loss of the present utility model and short-circuit impedance pilot system
Figure.
Specific embodiment
With reference to the accompanying drawings and examples the technical scheme in this utility model embodiment is clearly and completely retouched
State, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole embodiments.
Referring to Fig. 1, which is the wiring original of converter power transformer load loss of the present utility model and short-circuit impedance pilot system
Reason figure.
A kind of converter power transformer load loss of the present embodiment and short-circuit impedance pilot system, for converter power transformer,
Load loss and short-circuit impedance test are carried out, 1 input of variable-frequency power sources cabinet accesses three-phase 10kV and powers variable-frequency power sources, and its output is single
30～200Hz of phase, the variable ratio frequency changer of 0～10kV and variable-voltage power supply, it is ensured that three phase power is enough and balances, and variable-frequency power sources cabinet 1 is exported
End is connected with 2 low-pressure side two ends of intermediate transformer, and the high pressure winding outfan of intermediate transformer 2 is A ends, and high pressure winding tail end is
B ends, A, B two ends are in parallel with compensating electric capacity tower 3, the A ends of the intermediate transformer 2 high gland also with the net side of converter power transformer 10
Pipe 9 connects, and the B ends of intermediate transformer 2 are also connected with the earth terminal of converter power transformer 10, the first winding string of current transformer TA
It is connected on the line between 10 net side bushing 9 of A ends and converter power transformer, the two ends of the Secondary Winding of current transformer TA connect
It is connected on the current wiring terminal of a power analyzer 7；The first winding two ends of voltage transformer TV connect side a and b respectively,
The Secondary Winding two ends of voltage transformer TV are connected on the voltage wiring terminal of power analyzer 7.
Referring to the intermediate transformer schematic diagram of Fig. 2 the present embodiment, 2 low-pressure side of intermediate transformer of employing have 8kV, 10kV,
Tri- gears of 12kV, high-pressure side have multiple gears such as 20kV, 40kV, 80kV, wherein 12 ports are number coils of low-pressure side
12kV line ends, 13 ports be 10kV line ends, 14 ports be 8kV line ends, 15 ports be neutral point, 16 ports are No. two lines of low-pressure side
The 12kV line ends on road, 17 ports be 10kV line ends, 18 ports be 8kV line ends, 19 ports be neutral point, 20 ports are high-pressure sides
120kV line ends, 21 ports be 80kV line ends, 22 ports be 40kV line ends, 23 ports be 15kV line ends, 24 ports be neutral point,
Connection corresponding port, it is possible to use different voltage change ratios, one is to complete voltage matches with tested converter power transformer, and two is more preferable
Ground coordinates the output voltage for making high-voltage variable frequency power source more than 90% rated voltage.2 low-pressure side of above-mentioned intermediate transformer is included
Two coil windings, it is possible to achieve series and parallel is used, such as in larger current, using used in parallel, when multiple time variant voltage is less
Using being used in series, by above-mentioned flexible use, can fully compatibility test product and variable-frequency power sources.
The using method of two coil windings is explained in detail below：When described two coil windings are connected in series, then a coil
Winding is connected with the voltage gear terminals of another coil windings in neutral point, and the respective free end connection of two coil windings becomes
Frequency power cabinet；Described two coil windings are connected in parallel, then two coils in voltage gear terminals and neutral point terminals simultaneously
Connection, such as 2 one power input of intermediate transformer after being connect using 12 ports and 16 ports altogether, after 15 ports are connect altogether with 19 ports
Used as 2 another power input of intermediate transformer, remaining port of 2 low-pressure side of intermediate transformer is hanging.
Select 2 on high-tension side 20 port of intermediate transformer as high pressure winding outfan, high-pressure side neutral point is 24 ports
Ground connection, remaining port of high-pressure side are hanging.
A Current Mutual Inductance is concatenated on any one line between the Secondary Winding and power analyzer 7 of current transformer TA
Device 2, bridges a voltmeter 4 between the two ends of the Secondary Winding of voltage transformer TV.
Used as one embodiment, the compensating electric capacity tower 3 includes the dismountable capacitor bank of at least two-layer；Further institute
The capacitor bank rated voltage for stating per layer is 20kV.It is referring to the present embodiment compensating electric capacity tower 3 shown in Fig. 3, removable using four layers
The capacitor bank unloaded, total voltage are 80kV, can be used with monolayer use, multilamellar use, full voltage.Compensating electric capacity tower 3 in figure
25 ports be high pressure end of incoming cables, 26 ports be low-pressure line-outgoing end, 27 ports be wiring point when two-layer is accumulated, 28 ports be two
Bus junction point when side is accumulated.40kV part is listed in figure only, up and down each 20kV, each rated capacitor voltage 10kV.
40kV structures are consistent in addition, unlisted in figure.The high pressure end of incoming cables of compensating electric capacity tower 3 connects the high pressure winding of intermediate transformer 2
Outfan, the low-pressure line-outgoing end of compensating electric capacity tower 3 and the neutral point terminals common ground of intermediate transformer 2.
Used as one embodiment, voltage measurement jumps to two excitation transformations using 0.1 grade of 220kV all insulation voltage transformer
On the high-pressure side of device, voltage transformer TV summation current transformers TA is respectively 0.1 grade of all insulation voltage transformer and 0.01 grade electric
Current transformer.The voltage and rate-adaptive pacemaker for adjusting variable-frequency power sources cabinet 1 can carry out the specified stream of 0.1 times of net side to 1 times of valve side volume
Determine the load test under the difference electric current such as electric current, and carry out the measurement of load loss and short-circuit impedance.
Above-described embodiment only not limits the technical scheme described by this utility model to illustrate this utility model；Cause
This, is although this specification has been carried out detailed description with reference to each above-mentioned embodiment to this utility model, this area
It is to be appreciated by one skilled in the art that still can modify to this utility model or equivalent；And all without departing from
The technical scheme of spirit and scope of the present utility model and its improvement, which all should be covered in right of the present utility model
It is central.
Claims (9)
1. a kind of converter power transformer load loss and short-circuit impedance pilot system, it is characterised in that include variable-frequency power sources cabinet
(1), intermediate transformer (2), compensating electric capacity tower (3), voltage transformer (8), current transformer (6) and converter power transformer (10),
Low-pressure side conveying alternating source of the variable-frequency power sources cabinet (1) to intermediate transformer (2), the high pressure winding of intermediate transformer (2)
Outfan is A ends, and high pressure winding tail end is B ends, and A, B two ends are in parallel with compensating electric capacity tower (3), the A of the intermediate transformer (2)
End is also connected with the net side bushing (9) of converter power transformer (10), the B ends of intermediate transformer (2) also with converter power transformer
(10) earth terminal connection, the first winding of current transformer TA are serially connected with A ends and converter power transformer (10) net side bushing
(9), on the line between, the two ends of the Secondary Winding of current transformer TA are connected to the current terminal of a power analyzer (7)
On son；The first winding two ends of voltage transformer TV connect side a and b respectively, and the Secondary Winding two ends of voltage transformer TV connect
It is connected on the voltage wiring terminal of power analyzer (7).
2. converter power transformer load loss according to claim 1 and short-circuit impedance pilot system, it is characterised in that described
The low-pressure side of intermediate transformer (2) includes two coil windings, and two coil windings are connected in series or are connected in parallel.
3. converter power transformer load loss according to claim 2 and short-circuit impedance pilot system, it is characterised in that in electricity
A current transformer (6) is concatenated on any one line between the Secondary Winding of current transformer TA and power analyzer (7), in electricity
A voltmeter (4) is bridged between the two ends of the Secondary Winding of pressure transformer TV.
4. the converter power transformer load loss and short-circuit impedance pilot system according to Claims 2 or 3, it is characterised in that
Described two coil windings are connected in parallel, then two coils are in parallel in voltage gear terminals and neutral point terminals；Described two
Individual coil windings are connected in series, then a coil windings are connected with the voltage gear terminals of another coil windings in neutral point
Connect, the respective free end of two coil windings connects variable-frequency power sources cabinet.
5. the converter power transformer load loss and short-circuit impedance pilot system according to claims 1 to 3 any one, which is special
Levy and be, the compensating electric capacity tower (3) includes the dismountable capacitor bank of at least two-layer.
6. converter power transformer load loss according to claim 5 and short-circuit impedance pilot system, it is characterised in that described
Per layer of capacitor bank rated voltage is 20kV.
7. the converter power transformer load loss and short-circuit impedance pilot system according to claims 1 to 3 any one, which is special
Levy and be, the input of the variable-frequency power sources cabinet (1) connection three-phase 10kV power supplys, variable-frequency power sources cabinet (1) output single-phase 30～
200Hz, the variable ratio frequency changer of 0～10kV and variable-voltage power supply.
8. the converter power transformer load loss and short-circuit impedance pilot system according to claims 1 to 3 any one, which is special
Levy and be, intermediate transformer (2) low-pressure side has tri- voltage gears of 8kV, 10kV, 12kV, high-pressure side have 20kV, 40kV,
Many voltage gears of 80kV.
9. the converter power transformer load loss and short-circuit impedance pilot system according to claims 1 to 3 any one, which is special
Levy and be, the voltage transformer TV summation current transformers TA is respectively 0.1 step voltage transformer and 0.01 grade of current transformer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620261657.8U CN206057431U (en) | 2016-03-31 | 2016-03-31 | A kind of converter power transformer load loss and short-circuit impedance pilot system |
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|---|---|---|---|
| CN201620261657.8U CN206057431U (en) | 2016-03-31 | 2016-03-31 | A kind of converter power transformer load loss and short-circuit impedance pilot system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107482666A (en) * | 2017-09-14 | 2017-12-15 | 国家电网公司 | A kind of extra-high voltage direct-current engineering converter power transformer short-circuit impedance design method |
| CN108051649A (en) * | 2017-12-25 | 2018-05-18 | 东莞市长工微电子有限公司 | A kind of detection circuit and its detection method of exterior arrangement resistance |
| CN108120895A (en) * | 2018-01-15 | 2018-06-05 | 云南电网有限责任公司电力科学研究院 | A kind of wave of oscillation detection deformation of transformer winding circuit and method |
| CN108627725A (en) * | 2018-07-11 | 2018-10-09 | 东莞市大忠电子有限公司 | A kind of special transformer automatic test platform and its test method |
| CN109782070A (en) * | 2019-03-08 | 2019-05-21 | 大唐东营发电有限公司 | A kind of method of PT test short-circuit impedance |
| CN110531214A (en) * | 2019-08-28 | 2019-12-03 | 中广核工程有限公司 | For detecting the detection verification method of Secondary Circuit of Potential Transformer winding short circuit |
| CN111736011A (en) * | 2020-05-19 | 2020-10-02 | 南方电网科学研究院有限责任公司 | Controllable zero sequence current transformer |
| CN112051526A (en) * | 2020-07-22 | 2020-12-08 | 中国电力科学研究院有限公司 | Test platform and method for testing excitation characteristics of transformer model |
| CN112698131A (en) * | 2020-12-11 | 2021-04-23 | 国网青海省电力公司电力科学研究院 | High-altitude extra-high voltage converter transformer empty load and temperature rise test device |
| CN114002274A (en) * | 2021-10-29 | 2022-02-01 | 浙江华电器材检测研究院有限公司 | Method and device for calculating capacitance compensation in nondestructive testing test of transformer winding parameters |
| CN114002274B (en) * | 2021-10-29 | 2024-04-26 | 浙江华电器材检测研究院有限公司 | Calculation method and device for capacitance compensation in nondestructive testing of transformer winding parameters |
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- 2016-03-31 CN CN201620261657.8U patent/CN206057431U/en active Active
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| CN107482666B (en) * | 2017-09-14 | 2020-03-31 | 国家电网公司 | Design method for short-circuit impedance of converter transformer in extra-high voltage direct current engineering |
| CN107482666A (en) * | 2017-09-14 | 2017-12-15 | 国家电网公司 | A kind of extra-high voltage direct-current engineering converter power transformer short-circuit impedance design method |
| CN108051649A (en) * | 2017-12-25 | 2018-05-18 | 东莞市长工微电子有限公司 | A kind of detection circuit and its detection method of exterior arrangement resistance |
| CN108120895A (en) * | 2018-01-15 | 2018-06-05 | 云南电网有限责任公司电力科学研究院 | A kind of wave of oscillation detection deformation of transformer winding circuit and method |
| CN108627725A (en) * | 2018-07-11 | 2018-10-09 | 东莞市大忠电子有限公司 | A kind of special transformer automatic test platform and its test method |
| CN108627725B (en) * | 2018-07-11 | 2023-09-08 | 东莞市大忠电子有限公司 | Special transformer automatic test platform and test method thereof |
| CN109782070A (en) * | 2019-03-08 | 2019-05-21 | 大唐东营发电有限公司 | A kind of method of PT test short-circuit impedance |
| CN110531214A (en) * | 2019-08-28 | 2019-12-03 | 中广核工程有限公司 | For detecting the detection verification method of Secondary Circuit of Potential Transformer winding short circuit |
| CN110531214B (en) * | 2019-08-28 | 2022-06-07 | 中广核工程有限公司 | Detection and verification method for detecting short circuit of secondary circuit winding of voltage transformer |
| CN111736011A (en) * | 2020-05-19 | 2020-10-02 | 南方电网科学研究院有限责任公司 | Controllable zero sequence current transformer |
| CN112051526A (en) * | 2020-07-22 | 2020-12-08 | 中国电力科学研究院有限公司 | Test platform and method for testing excitation characteristics of transformer model |
| CN112051526B (en) * | 2020-07-22 | 2023-08-18 | 中国电力科学研究院有限公司 | Test platform and method for testing excitation characteristics of transformer model |
| CN112698131A (en) * | 2020-12-11 | 2021-04-23 | 国网青海省电力公司电力科学研究院 | High-altitude extra-high voltage converter transformer empty load and temperature rise test device |
| CN114002274A (en) * | 2021-10-29 | 2022-02-01 | 浙江华电器材检测研究院有限公司 | Method and device for calculating capacitance compensation in nondestructive testing test of transformer winding parameters |
| CN114002274B (en) * | 2021-10-29 | 2024-04-26 | 浙江华电器材检测研究院有限公司 | Calculation method and device for capacitance compensation in nondestructive testing of transformer winding parameters |
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