CN101477167A - Voltage differential transformer turn-to-turn short circuit detection apparatus - Google Patents
Voltage differential transformer turn-to-turn short circuit detection apparatus Download PDFInfo
- Publication number
- CN101477167A CN101477167A CNA2008100590041A CN200810059004A CN101477167A CN 101477167 A CN101477167 A CN 101477167A CN A2008100590041 A CNA2008100590041 A CN A2008100590041A CN 200810059004 A CN200810059004 A CN 200810059004A CN 101477167 A CN101477167 A CN 101477167A
- Authority
- CN
- China
- Prior art keywords
- voltage
- transformer
- coil
- turn
- low
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 10
- 230000006698 induction Effects 0.000 claims abstract description 6
- 239000000284 extract Substances 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 230000004224 protection Effects 0.000 description 18
- 230000009467 reduction Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Landscapes
- Protection Of Transformers (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a detection device for short circuit among turns of a transformer by differential voltage, which comprises a single-phase transformer TM arranged on a single-phase high-voltage power supply line, wherein the single-phase transformer TM comprises a high-voltage coil K, a low-voltage coil N and an induction voltage coil J, and a high-voltage side of the single-phase transformer TM is provided with a voltage transformer PT. The device is characterized in that an iron core column of a body of the single-phase transformer TM is additionally provided with a group of measurement coils CX used for directly extracting induction voltage of a power supply, low voltage U1' extracted by the measurement coils CX should be consistent with a calculated value of secondary voltage U1 of the voltage transformer PT, component voltage U2' is extracted from a secondary output side a of the single-phase transformer TM, a tap N1 of the low-voltage coil N is connected with a B voltage comparator M, a voltage tap wire b is taken from the single-phase transformer TM and is connected with the B voltage comparator M, a secondary output voltage tap wire c of the voltage transformer PT and the induction voltage coil J of the single-phase transformer TM are connected with an A voltage comparator Q respectively, and the A voltage comparator Q and the B voltage comparator M compare output voltage and output a result.
Description
Technical field
The present invention relates to a kind of pick-up unit that utilizes differential voltage to the transformer turn-to-turn short circuit, detect when being exclusively used in the power transformer turn-to-turn short circuit and protect.
Background technology
Power transformer is along with the expansion of city size, and its quantity and capacity are all in quick growth.But present power transformer is except jumbo transformer or have the transformer of special requirement that the detection of electric current longitudinal differential is installed; can be to the serious turn-to-turn in transformer inside, phase fault protection; and the oil-immersed type transformer of intermediate size can install outside the gas relay protection, and other oil immersion product, dry type product less than 6300 kilovolt-amperes all not have to install can find turn-to-turn short circuit fault in early stage and the phase fault holding circuit of fault in earlier stage.These do not install turn-to-turn by national relay protection requirement GB50062-92 design specifications, and there are the following problems with phase fault protection equipment: the one, and when owing to outside or inner reason turn-to-turn or layer short circuit fault having taken place, transformer can not in time find the initial little energy state of fault, thereby the protection action that just can cause the high pressure end of incoming cables behind the serious high capacity short circuit energy state such as fault is extended to catch fire, thereby make fault can not handle extension early, for the reparation of transformer after the fault causes great difficulty, particularly higher level transformer station overcurrent can be pushed away after the fault extension, cause sizable infringement to the scene, all cause serious harm to Supply Security and personal safety; The 2nd, in case there is coil short to take place can not in time analyze and determine to provide fault type, is difficult to make corresponding protection and handles.
Summary of the invention
The objective of the invention is to have only overcurrent protection in order to overcome; and do not have a transformer of interturn short circuit protection and phase fault protection; or though current differential is arranged but to high voltage short circuit since fault early stage capacity of short circuit little; insensitive; can not catch its fault electric current longitudinal differential in earlier stage backup protection is provided; particularly high-power transformer is needed two protections (but existing two still double-current differential protection of protecting), and the pick-up unit of the differential voltage of differential voltage protection to the transformer turn-to-turn short circuit is provided.
Differential voltage of the present invention to the technical scheme of the pick-up unit of transformer turn-to-turn short circuit is: comprise the single transformer TM that is installed in the single-phase high voltage supply line, single transformer TM comprises high-tension coil K, low-voltage coil N and induced voltage coil J, at single transformer TM high-pressure side installing voltage transformer pt, it is characterized in that single transformer TM bulk iron stem stem establishes one group in addition and be used for directly extracting power induction voltage measurement coil CX, measure the low-voltage U that coil CX extracts
1' should with the secondary voltage U of voltage transformer pt
1The calculated value unanimity is extracted component voltage U among the secondary outgoing side a of single transformer TM
2' (so-called component voltage is meant a part of voltage of secondary outgoing side a), low-voltage coil N tap N
1Connect B plus voltage comparer M, press from single transformer TM power taking in addition and take out line b connection B plus voltage comparer M, the induced voltage coil J that voltage transformer pt secondary output voltage is taken out line c and single transformer TM connects first voltage comparator Q respectively, and first voltage comparator Q and B plus voltage comparer M are compared and the result is exported the voltage of exporting.
Differential voltage of the present invention is to the pick-up unit of transformer turn-to-turn short circuit, and the one, transformer once surveyed the voltage measurement of surveying with secondary; The 2nd, thus to associated voltage carry out vector calculate with the coil working state that relatively calculates single transformer be normally or malfunction; The 3rd, it is to continue operation that the back result by reality that reaches a conclusion provides, and still gives the alarm, or sends and cut off incoming power signal guard signal.Its dynamo-electric testing process: should install the voltage transformer pt of independent special use (this voltage transformer (VT) should be able to carry out the adjustment of corresponding gear as requested with protected transformer, and the secondary voltage U of this voltage transformer (VT) in single transformer TM high-pressure side
1Should with U
1' equate), on the every post of transformer body iron core, need establish one group of measurement coil CX that is used for directly extracting the mains side induced voltage in addition in addition, this measures the low-voltage U that coil CX extracts
1' should with the secondary voltage U of mutual inductor
1Calculated value is consistent.In the secondary outgoing side a of single transformer TM, also extract a part of voltage U again in addition
2', by relevant conversion secondary side is extracted the full voltage U that voltage transitions becomes secondary side
2It is carried out correlativity relatively.Following two comparison procedure are arranged: 1, the voltage of choosing on voltage transformer pt secondary voltage and the iron core column is compared; at pressure reduction during less than a definite numerical value; think that problem does not take place the number of turn of primary winding; if comparing result surpasses the proportional range of determining; then need export a guard signal; give definite actuating signal of protection system, assert that transformer high-voltage coil K is short-circuited or fault.2, the secondary full voltage that sampling voltage is converted to secondary full voltage and output is compared; when determining the two no pressure reduction, can the attonity signal, if the two has pressure reduction; and surpass the upper limit of a permission, then the output protection signal assert that transformer breaks down.The short circuit phase of determining all can find transformer of said two devices, and can find that the fault coil is high-tension coil K or low-voltage coil N.
Description of drawings
Fig. 1 is the structural representation of differential voltage of the present invention to the pick-up unit of transformer turn-to-turn short circuit.
Embodiment
The invention discloses the pick-up unit of a kind of differential voltage to the transformer turn-to-turn short circuit, as shown in Figure 1, comprise the single transformer TM that is installed in the single-phase high voltage supply line, single transformer TM comprises high-tension coil K, low-voltage coil N and induced voltage coil J, at single transformer TM high-pressure side installing voltage transformer pt, it is characterized in that single transformer TM bulk iron stem stem establishes one group in addition and be used for directly extracting power induction voltage measurement coil CX, measure the low-voltage U that coil CX extracts
1' should with the secondary voltage U of voltage transformer pt
1The calculated value unanimity is extracted component voltage U among the secondary outgoing side a of single transformer TM
2', low-voltage coil N tap N
1Connect B plus voltage comparer M, press from single transformer TM power taking in addition and take out line b connection B plus voltage comparer M, the induced voltage coil J that voltage transformer pt secondary output voltage is taken out line c and single transformer TM connects first voltage comparator Q respectively, and the voltage that voltage that first voltage comparator Q is got and B plus voltage comparer M extract compares respectively and screens.This pick-up unit has following advantage: the one, to the once survey of transformer and the voltage measurement of secondary survey; The 2nd, thus to voltage carry out vector calculate with the coil working state that relatively calculates single transformer be normally or malfunction; The 3rd, it is to continue operation that the back result by reality that reaches a conclusion provides, and still gives the alarm, or sends and cut off incoming power signal guard signal.Its dynamo-electric testing process: should install the voltage transformer pt of independent special use (this voltage transformer (VT) should be able to carry out the adjustment of corresponding gear as requested with protected transformer, and the secondary voltage U of this voltage transformer (VT) in single transformer TM high-pressure side
1Should with U
1' equate), on the every post of transformer body iron core, need establish one group of measurement coil CX that is used for directly extracting the mains side induced voltage in addition in addition, this measures the low-voltage U that coil CX extracts
1' should with the secondary voltage U of mutual inductor
1Calculated value is consistent.In the secondary outgoing side a of single transformer TM, also extract a part of voltage U again in addition
2' by relevant conversion, secondary side is extracted the full voltage U of voltage and secondary side
2It is carried out correlativity relatively.Following two comparison procedure are arranged: 1, the voltage of choosing on voltage transformer pt secondary voltage and the iron core column is compared; at pressure reduction during less than a definite numerical value; think that problem does not take place the number of turn of primary winding; if comparing result surpasses the proportional range of determining; then need export a guard signal; give definite actuating signal of protection system, assert that transformer high-voltage coil K is short-circuited or fault.2, the secondary full voltage after will changing and the secondary full voltage of output are compared, when determining the two no pressure reduction, can the attonity signal, and if the two has pressure reduction, and surpass the upper limit of a permission, then output protection signal identification transformer breaks down.The short circuit phase of determining all can find transformer of said two devices, and can find that the fault coil is high-tension coil K or low-voltage coil N.If with Digital Signal Processing then can be simpler.Install comparator coil on the iron core in addition as then noting be used in digital processing technology; only need carry out output current to output voltage proofreaies and correct; proofread and correct to normal no-load voltage; its voltage ratio with the voltage transformer (VT) of protection before the transformer is lower; compare as the unloaded output voltage that will be under the normal condition equates and the voltage of measurement; when being higher than a certain ratio of measuring voltage as the no-load voltage of output calibration; can assert that short circuit has taken place its primary winding; as be lower than a ratio, then can be defined as low-pressure side short circuit has taken place.
Claims (1)
1, differential voltage is to the pick-up unit of transformer turn-to-turn short circuit, comprise the single transformer (TM) that is installed in the single-phase high voltage supply line, single transformer (TM) comprises high-tension coil (K), low-voltage coil (N) and induced voltage coil (J), at single transformer (TM) high-pressure side installing voltage transformer (VT) (PT), it is characterized in that single transformer (TM) bulk iron stem stem establishes one group in addition and be used for directly extracting power induction voltage measurement coil (CX), measure the low-voltage U that coil (CX) extracts
1' should with the secondary voltage U of voltage transformer (VT) (PT)
1Extract component voltage U in the calculated value unanimity, the secondary outgoing side (a) of single transformer (TM)
2', low-voltage coil (N) tap (N
1) connection B plus voltage comparer (M), press from single transformer (TM) power taking in addition and take out line (b) connection B plus voltage comparer (M), the induced voltage coil (J) that voltage transformer (VT) (PT) secondary output voltage is taken out line (c) and single transformer (TM) connects first voltage comparator (Q) respectively, and first voltage comparator (Q) compares and the result is exported with the voltage of B plus voltage comparer (M) to output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100590041A CN101477167A (en) | 2008-01-01 | 2008-01-01 | Voltage differential transformer turn-to-turn short circuit detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100590041A CN101477167A (en) | 2008-01-01 | 2008-01-01 | Voltage differential transformer turn-to-turn short circuit detection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101477167A true CN101477167A (en) | 2009-07-08 |
Family
ID=40837913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100590041A Pending CN101477167A (en) | 2008-01-01 | 2008-01-01 | Voltage differential transformer turn-to-turn short circuit detection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101477167A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435827A (en) * | 2011-09-15 | 2012-05-02 | 西安交通大学 | Method and device for fault detection of DC short-circuit current based on Rogowski coil |
| CN102983550A (en) * | 2012-11-09 | 2013-03-20 | 重庆大学 | Transformer interturn short circuit protection method based on current ratio variable quantity |
| CN106501619A (en) * | 2016-12-31 | 2017-03-15 | 西南交通大学 | Core loss pilot system and method between a kind of lamination under short trouble |
| CN106526394A (en) * | 2016-12-31 | 2017-03-22 | 西南交通大学 | Iron core local temperature rise testing system and method in short circuit fault between wound core pieces |
| CN106771815A (en) * | 2016-12-31 | 2017-05-31 | 西南交通大学 | The transformer test platform and method of short circuit and magnetic flux relevance between test lamination |
| CN111323680A (en) * | 2018-12-17 | 2020-06-23 | 通用电气航空系统有限公司 | Method and circuit for detecting arc faults |
-
2008
- 2008-01-01 CN CNA2008100590041A patent/CN101477167A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435827A (en) * | 2011-09-15 | 2012-05-02 | 西安交通大学 | Method and device for fault detection of DC short-circuit current based on Rogowski coil |
| CN102983550A (en) * | 2012-11-09 | 2013-03-20 | 重庆大学 | Transformer interturn short circuit protection method based on current ratio variable quantity |
| CN102983550B (en) * | 2012-11-09 | 2014-11-12 | 重庆大学 | Transformer interturn short circuit protection method based on current ratio variable quantity |
| CN106501619A (en) * | 2016-12-31 | 2017-03-15 | 西南交通大学 | Core loss pilot system and method between a kind of lamination under short trouble |
| CN106526394A (en) * | 2016-12-31 | 2017-03-22 | 西南交通大学 | Iron core local temperature rise testing system and method in short circuit fault between wound core pieces |
| CN106771815A (en) * | 2016-12-31 | 2017-05-31 | 西南交通大学 | The transformer test platform and method of short circuit and magnetic flux relevance between test lamination |
| CN106501619B (en) * | 2016-12-31 | 2018-04-13 | 西南交通大学 | Core loss pilot system and method between a kind of lamination under short trouble |
| CN106771815B (en) * | 2016-12-31 | 2018-05-08 | 西南交通大学 | Short circuit and the transformer test platform and method of magnetic flux relevance between test lamination |
| CN106526394B (en) * | 2016-12-31 | 2018-07-27 | 西南交通大学 | Iron core local temperature rise pilot system and method under short trouble between rewinding material piece |
| CN111323680A (en) * | 2018-12-17 | 2020-06-23 | 通用电气航空系统有限公司 | Method and circuit for detecting arc faults |
| US11573256B2 (en) | 2018-12-17 | 2023-02-07 | Ge Aviation Systems Limited | Method and circuit for detecting an arc fault |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8531188B2 (en) | Detector of transformer interturn short circuit using voltage differential | |
| US10910812B2 (en) | Method for testing open phase detection system | |
| EP1890369B1 (en) | Ground fault detection | |
| RU2550152C1 (en) | System and method of protection of electric power system | |
| Bo et al. | A new technique for transformer protection based on transient detection | |
| CN106940415B (en) | Detection system for capacitive bushings with measurement terminal and end screen grounding terminal | |
| RU2583452C2 (en) | Directed detection of resistive ground fault and rupture of conductor of medium voltage | |
| CN101587157B (en) | Bus differential protection polarity test method | |
| CN101477167A (en) | Voltage differential transformer turn-to-turn short circuit detection apparatus | |
| CN201133924Y (en) | Differential voltage transformer turn-to-turn short circuit detection device | |
| US20100149700A1 (en) | Power distribution system and electrical switching apparatus employing a filter trap circuit to provide arc fault trip coordination | |
| KR101488104B1 (en) | System for Detecting Open Phase on a Connection Line of Stand-by Transformer in Nuclear Power Plant by Using Rogowski Coil | |
| KR101399922B1 (en) | Current transformer protection device | |
| CN103606889B (en) | A kind of secondary side overcurrent protection circuit of electric arc furnace transformer | |
| CN109274070A (en) | 10 kV voltage transformer protection system and protection method | |
| KR20120018282A (en) | Directional detection of ground fault with a single sensor | |
| CN102520309A (en) | Method for judging open circuit of secondary loop of current transformer | |
| CN105093058B (en) | Current Transformer Secondary side open circuit method of discrimination and corresponding discriminating gear | |
| CN104937801A (en) | An electrical protection device | |
| CN108700630A (en) | Method and system for phase loss detection in power transformers | |
| CN104953545A (en) | Air-core reactor interturn fault protection device and air-core reactor interturn fault protection method | |
| CN204651898U (en) | A kind of air core reactor turn-to-turn fault protective device | |
| Czaja | Examination of the impact of design of a residual current protective device on the release frequency range | |
| RU2638299C2 (en) | Device for protection of windings of one-phase transformer from damages | |
| KR20160047208A (en) | Apparatus and method for detecting internal fault of transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20090708 |