CN107884665A - Prevent the device and method of generator outlet voltage transformer turn-to-turn short circuit false tripping machine - Google Patents
Prevent the device and method of generator outlet voltage transformer turn-to-turn short circuit false tripping machine Download PDFInfo
- Publication number
- CN107884665A CN107884665A CN201711214338.7A CN201711214338A CN107884665A CN 107884665 A CN107884665 A CN 107884665A CN 201711214338 A CN201711214338 A CN 201711214338A CN 107884665 A CN107884665 A CN 107884665A
- Authority
- CN
- China
- Prior art keywords
- turn
- voltage transformer
- short circuit
- phase
- generator
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000004804 winding Methods 0.000 claims abstract description 60
- 230000004224 protection Effects 0.000 claims abstract description 29
- 230000007935 neutral effect Effects 0.000 claims abstract description 22
- 238000009413 insulation Methods 0.000 claims description 14
- 239000013307 optical fiber Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 abstract description 3
- 230000007257 malfunction Effects 0.000 abstract description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002964 excitative effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/72—Testing of electric windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/06—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric generators; for synchronous capacitors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Synchronous Machinery (AREA)
- Protection Of Generators And Motors (AREA)
Abstract
The invention belongs to generator technical field of relay protection, disclose a kind of device and method for preventing generator outlet voltage transformer turn-to-turn short circuit false tripping machine, by installing current sensor additional between the high-pressure side and its neutral point of generator outlet voltage transformer first side winding, after any one phase current exceedes setting value in three-phase, locking stator ground fault protection unit, and send alarm signal, after primary side fuse blows, normally-closed contact closes, release the locking to generator stator ground protection location, after fuse blows, the various protections of generator, malfunction is prevented by its CT wire break blocking function.
Description
Technical field
The invention belongs to generator technical field of relay protection, more particularly to one kind to prevent generator outlet voltage transformer
The device and method of turn-to-turn short circuit false tripping machine, available for preventing from being installed in the voltage transformer of generator outlet that turn-to-turn occurs is short
Road failure causes generator false tripping machine.
Background technology
In order to measure generator voltage in real time, meet that monitoring, control and the needs protected, the stator winding of generating set are defeated
Go out end and install exit potential transformer.
Current most of generator mains will be using epoxy casting voltage mutual inductor.Epoxy casting voltage mutual inductor
Due to reasons such as design, manufacturing process, its insulating inner there may exist certain air gap, and under working voltage effect, production
Raw shelf depreciation.Long term and development with shelf depreciation, its turn-to-turn insulation are possible to gradually damage, and it is short to form turn-to-turn
The probability of failure on road, particularly first side winding is higher.
Generator outlet voltage transformer occur turn-to-turn short circuit after, on the one hand can be caused due to its inner heat it is on fire or
Blast, because generator outlet is all equiped with fuse, by the inverse time protection characteristic of fuse, caused by its turn-to-turn short circuit
Transformer is on fire and blast can be effectively prevented.On the other hand, the turn-to-turn short circuit of generator outlet voltage transformer can cause
Deviation in terms of generator voltage measurement, occur at the both ends of generator outlet voltage transformer secondary side open-delta wiring
Residual voltage, generator stator ground protection gathers the residual voltage as protection act criterion, when residual voltage is more than protection
Stator ground fault protection acts during setting value, and protection device sends trip command, unit circuit breaker trip, so as to cause millions of members
Economic loss and to a certain degree under environmental pollution.
The content of the invention
For above-mentioned technical problem, it is an object of the invention to provide one kind to prevent generator outlet voltage transformer turn-to-turn
The device and method of short-circuit false tripping machine, turn-to-turn short circuit event is occurring available for the voltage transformer for being installed in generator outlet is prevented
Cause generator false tripping machine during barrier.
To reach above-mentioned purpose, the present invention, which adopts the following technical scheme that, to be achieved.
Technical scheme one：
A kind of device for preventing generator outlet voltage transformer turn-to-turn short circuit false tripping machine, generator outlet are provided with three-phase
Three output ends of voltage, described device include：Alarm unit and corresponding three single-phase potential transformers, three fusing
Device, three current sensors and three auxiliary reclays；Wherein, each auxiliary reclay at least has a normally opened contact and one
Individual normally-closed contact；
Wherein, each single-phase potential transformer comprises at least first side winding and secondary side winding, and three single-phase voltages
The secondary side winding of transformer connects for open-delta；And three output ends of three-phase voltage and three single-phase voltage mutual inductances
Concatenation three fuses are corresponded between the high-pressure side of device respectively, the low-pressure end of three single-phase potential transformers and star are neutral
Concatenation three current sensors are corresponded between point respectively；
The signal output part of each current sensor connects the drive end of a corresponding auxiliary reclay, and three centres after
Corresponding three normally-closed contacts are serially connected to form series arm electrical equipment respectively, and two terminals of the series arm are remembered respectively
For A1 ends and A2 ends；Corresponding three normally opened contacts connect together to form parallel branch three auxiliary reclays respectively, described
Two terminals of parallel branch are designated as B1 ends and B2 ends respectively；
The B1 ends and B2 ends of the parallel branch are connected respectively the alarm for voltage transformer turn-to-turn short circuit alarm
Two alarm signal trigger terminals of unit；
The open delta output end of the secondary side winding of three single-phase potential transformers is connected with a residual voltage
The drive end of relay, and one end of a normally opened contact of the residual voltage relay connects the A1 of the series arm
End, one of the breaker of the other end connection generator of the normally opened contact disconnect startup terminal；The breaker of generator it is another
One disconnects the A2 ends for starting the terminal connection series arm.
The characteristics of technical solution of the present invention and further it is improved to：
(1) when three single-phase potential transformers are grad insulated voltage transformer, three single-phase voltages are mutual
The star neutral point common ground of three first side windings corresponding to sensor.
(2) when three single-phase potential transformers are all insulation voltage transformer, three single-phase voltage mutual inductances
The star neutral point of three first side windings is hanging corresponding to device, and the signal output part of each current sensor passes through optical fiber
Unit connects the drive end of its corresponding auxiliary reclay.
(3) fiber unit includes transmitting terminal optical-electrical converter, optical fiber cable and receiving terminal optical-electrical converter.
(4) when three single-phase potential transformers are all insulation voltage transformer, three single-phase voltage mutual inductances
The star neutral point of three first side windings is hanging corresponding to device, and the signal output part of each current sensor passes through wireless
Transmission unit connects the drive end of its corresponding auxiliary reclay.
(5) wireless transmission unit includes wireless launcher and wireless receiver.
Technical scheme two：
A kind of method for preventing generator outlet voltage transformer turn-to-turn short circuit false tripping machine, methods described are applied to technical side
In device described in case one, methods described includes：
When the first side winding turn-to-turn short circuit of any one single-phase potential transformer, the output of corresponding current sensor detection
When current value is more than setting current；
Auxiliary reclay action corresponding to the output current control of the current sensor, makes corresponding auxiliary reclay
Normally-closed contact disconnects, normally opened contact closure；
Wherein, the normally-closed contact of the auxiliary reclay disconnects the false tripping for preventing generator stator ground protection location
Machine, secondary side winding of the generator stator ground protection location by three single-phase potential transformers, residual voltage relay
And the breaker composition of generator；The normally opened contact of the auxiliary reclay closes mutual for triggering alarm unit progress voltage
Sensor turn-to-turn short circuit is alarmed.
Technical solution of the present invention is when when the generation turn-to-turn short circuit of generator outlet voltage transformer, locking stator ground fault protection
Unit, so as to be effectively isolated by its primary side fuse blows to it, generator maloperation is avoided, and fuse in primary side
The locking to the protection of generator unit stator winding earth is released after device fusing, after fuse blows, the various defencive functions of generator,
Malfunction is prevented by its CT wire break blocking function.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is that one kind provided in an embodiment of the present invention prevents the turn-to-turn short circuit of generator outlet grad insulated voltage transformer from missing
The structural representation of the device of chaser；
Fig. 2 is that one kind provided in an embodiment of the present invention prevents generator outlet all insulation voltage transformer turn-to-turn short circuit false tripping
The structural representation of the device of machine；
Label 1 represents generator, and label 2 represents fuse A, and label 3 represents fuse B, and label 4 represents fuse C, mark
Numbers 5 represent the first side winding of A phase voltage transformers, and label 6 represents the first side winding of B phase voltage transformers, and label 7 represents
The first side winding of C phase voltage transformers, label 8 represent the current sense being connected with the first side winding of A phase voltage transformers
Device, label 9 represent the current sensor being connected with the first side winding of B phase voltage transformers, and label 10 represents mutual with C phase voltages
The current transformer of the first side winding connection of sensor, label 11 represent first auxiliary reclay, and label 12 represents second
Auxiliary reclay, label 13 represent the 3rd auxiliary reclay, and label 14 represents the normally-closed contact of the 3rd auxiliary reclay, mark
Numbers 15 represent the normally-closed contact of second auxiliary reclay, and label 16 represents the normally-closed contact of first auxiliary reclay, label
17 represent the normally opened contact of the 3rd auxiliary reclay, and label 18 represents the normally opened contact of second auxiliary reclay, label 19
The normally opened contact of first auxiliary reclay is represented, label 20 represents alarm unit, and label 21 represents residual voltage relay, mark
Numbers 22 represent the breaker of generators, represent 23 secondary side windings for representing three single-phase potential transformers.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Generator outlet voltage transformer is broadly divided into two kinds, and a kind of is the electricity of first side winding three-phase isolated neutral
Transformer is pressed, when single-phase earthing occurs, its neutral point voltage-to-ground rises to phase voltage, therefore, its whole first winding pair
Ground allows for bearing phase voltage, so referred to as all insulation transformer.Another kind is that first side winding three-phase neutral point is direct
The voltage transformer of ground connection, because its high pressure winding head end is connected at every phase high voltage, tail end ground connection, the number of turn residing for winding is not
Together, voltage difference is born over the ground, so referred to as graded insulation transformer.
When voltage transformer winding occur turn-to-turn short circuit when, due to the demagnetizing effect of short-circuit circle, voltage transformer it is excitatory
Electric current increased dramatically so that its field winding electric current is much larger than its running current.Therefore, can be by detecting mutual induction of voltage
The electric current of device field winding judges whether voltage transformer occurs turn-to-turn short circuit.
Generator outlet voltage transformer is excitatory by first side winding, can be to grad insulated voltage transformer
Its primary side winding earth end installs current sensor additional, measures its electric current.
The embodiment of the present invention provides a kind of device (this reality for preventing generator outlet voltage transformer turn-to-turn short circuit false tripping machine
Apply example and be applied to grad insulated voltage transformer), generator outlet is provided with three output ends of three-phase voltage, as shown in figure 1,
Described device includes：Alarm unit and corresponding three single-phase potential transformers, three fuses, three current sensors
With three auxiliary reclays；Wherein, each auxiliary reclay at least has a normally opened contact and a normally-closed contact；
Wherein, each single-phase potential transformer comprises at least first side winding and secondary side winding, and three single-phase voltages
The secondary side winding of transformer connects for open-delta；And three output ends of three-phase voltage and three single-phase voltage mutual inductances
Concatenation three fuses are corresponded between the high-pressure side of device respectively, the low-pressure end of three single-phase potential transformers and star are neutral
Concatenation three current sensors are corresponded between point respectively；And three primary sides corresponding to three single-phase potential transformers
The star neutral point common ground of winding.
The signal output part of each current sensor connects the drive end of a corresponding auxiliary reclay, and three centres after
Corresponding three normally-closed contacts are serially connected to form series arm electrical equipment respectively, and two terminals of the series arm are remembered respectively
For A1 ends and A2 ends；Corresponding three normally opened contacts connect together to form parallel branch three auxiliary reclays respectively, described
Two terminals of parallel branch are designated as B1 ends and B2 ends respectively；
The B1 ends and B2 ends of the parallel branch are connected respectively the alarm for voltage transformer turn-to-turn short circuit alarm
Two alarm signal trigger terminals of unit；
The open delta output end of the secondary side winding of three single-phase potential transformers is connected with a residual voltage
The drive end of relay, and one end of a normally opened contact of the residual voltage relay connects the A1 of the series arm
End, one of the breaker of the other end connection generator of the normally opened contact disconnect startup terminal；The breaker of generator it is another
One disconnects the A2 ends for starting the terminal connection series arm.
The embodiment of the present invention provides a kind of device (this reality for preventing generator outlet voltage transformer turn-to-turn short circuit false tripping machine
Apply example and be applied to all insulation voltage transformer), generator outlet is provided with three output ends of three-phase voltage, as shown in Fig. 2 institute
Stating device includes：Alarm unit and corresponding three single-phase potential transformers, three fuses, three current sensors and
Three auxiliary reclays；Wherein, each auxiliary reclay at least has a normally opened contact and a normally-closed contact；
Wherein, each single-phase potential transformer comprises at least first side winding and secondary side winding, and three single-phase voltages
The secondary side winding of transformer connects for open-delta；And three output ends of three-phase voltage and three single-phase voltage mutual inductances
Concatenation three fuses are corresponded between the high-pressure side of device respectively, the low-pressure end of three single-phase potential transformers and star are neutral
Concatenation three current sensors are corresponded between point respectively；And three primary sides corresponding to three single-phase potential transformers
The star neutral point of winding is hanging, and the signal output part of each current sensor connects its correspondingly centre by fiber unit
The drive end of relay.
Specifically, the fiber unit includes transmitting terminal optical-electrical converter, optical fiber cable and receiving terminal optical-electrical converter.
The signal output part of each current sensor connects the drive end of a corresponding auxiliary reclay, and three centres after
Corresponding three normally-closed contacts are serially connected to form series arm electrical equipment respectively, and two terminals of the series arm are remembered respectively
For A1 ends and A2 ends；Corresponding three normally opened contacts connect together to form parallel branch three auxiliary reclays respectively, described
Two terminals of parallel branch are designated as B1 ends and B2 ends respectively；
The B1 ends and B2 ends of the parallel branch are connected respectively the alarm for voltage transformer turn-to-turn short circuit alarm
Two alarm signal trigger terminals of unit；
The open delta output end of the secondary side winding of three single-phase potential transformers is connected with a residual voltage
The drive end of relay, and one end of a normally opened contact of the residual voltage relay connects the A1 of the series arm
End, one of the breaker of the other end connection generator of the normally opened contact disconnect startup terminal；The breaker of generator it is another
One disconnects the A2 ends for starting the terminal connection series arm.
Due to the first side winding three-phase isolated neutral of all insulation transformer, when single-phase earthing occurs, it is neutral
Point voltage-to-ground rises to phase voltage, and therefore, its whole first winding allows for bearing phase voltage over the ground, exists and electric current is passed
The Insulation Problems of sensor, therefore isolated by optical fiber, protection staff and equipment and safety.
The embodiment of the present invention provides a kind of device (this reality for preventing generator outlet voltage transformer turn-to-turn short circuit false tripping machine
Apply example and be applied to all insulation voltage transformer), generator outlet is provided with three output ends of three-phase voltage, as shown in Fig. 2 institute
Stating device includes：Alarm unit and corresponding three single-phase potential transformers, three fuses, three current sensors and
Three auxiliary reclays；Wherein, each auxiliary reclay at least has a normally opened contact and a normally-closed contact；
Wherein, each single-phase potential transformer comprises at least first side winding and secondary side winding, and three single-phase voltages
The secondary side winding of transformer connects for open-delta；And three output ends of three-phase voltage and three single-phase voltage mutual inductances
Concatenation three fuses are corresponded between the high-pressure side of device respectively, the low-pressure end of three single-phase potential transformers and star are neutral
Concatenation three current sensors are corresponded between point respectively；Three primary sides corresponding to three single-phase potential transformers around
The star neutral point organized is hanging, and the signal output part of each current sensor is connected in its correspondence by wireless transmission unit
Between relay drive end.
Specifically, the wireless transmission unit includes wireless launcher and wireless receiver.
The signal output part of each current sensor connects the drive end of a corresponding auxiliary reclay, and three centres after
Corresponding three normally-closed contacts are serially connected to form series arm electrical equipment respectively, and two terminals of the series arm are remembered respectively
For A1 ends and A2 ends；Corresponding three normally opened contacts connect together to form parallel branch three auxiliary reclays respectively, described
Two terminals of parallel branch are designated as B1 ends and B2 ends respectively；
The B1 ends and B2 ends of the parallel branch are connected respectively the alarm for voltage transformer turn-to-turn short circuit alarm
Two alarm signal trigger terminals of unit；
The open delta output end of the secondary side winding of three single-phase potential transformers is connected with a residual voltage
The drive end of relay, and one end of a normally opened contact of the residual voltage relay connects the A1 of the series arm
End, one of the breaker of the other end connection generator of the normally opened contact disconnect startup terminal；The breaker of generator it is another
One disconnects the A2 ends for starting the terminal connection series arm.
Due to the first side winding three-phase isolated neutral of all insulation transformer, when single-phase earthing occurs, it is neutral
Point voltage-to-ground rises to phase voltage, and therefore, its whole first winding allows for bearing phase voltage over the ground, exists and electric current is passed
The Insulation Problems of sensor, therefore isolated by being wirelessly transferred, protection staff and equipment and safety.
Further, one kind provided in an embodiment of the present invention prevents generator outlet voltage transformer turn-to-turn short circuit false tripping machine
Method, its operation principle is：When the first side winding turn-to-turn short circuit of any one single-phase potential transformer, corresponding current sense
When the output current value of device detection is more than setting current；Auxiliary reclay corresponding to the output current control of the current sensor
Action, disconnect the normally-closed contact of corresponding auxiliary reclay, normally opened contact closure；Wherein, the auxiliary reclay is normally closed
Contact disconnects the false tripping machine for preventing generator stator ground protection location, and the generator stator ground protection location is by three
The breaker composition of the secondary side winding of individual single-phase potential transformer, residual voltage relay and generator；The centre after
The normally opened contact of electrical equipment closes carries out voltage transformer turn-to-turn short circuit alarm for triggering alarm unit.
A kind of device for preventing generator outlet voltage transformer turn-to-turn short circuit false tripping machine provided in an embodiment of the present invention and
Method, by installing current sensor additional between generator outlet voltage transformer first side winding and its earth point, it is middle after
The electric current that electrical equipment receives control terminal is compared with setting value, and after any one phase current exceedes setting value in three-phase, locking is fixed
Sub- ground protection unit, and alarm signal is sent, after primary side fuse blows, normally-closed contact closure, release to generator
The locking of stator ground fault protection unit, after fuse blows, the various protections of generator, by its CT wire break blocking
Function prevents malfunction.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (7)
1. a kind of device for preventing generator outlet voltage transformer turn-to-turn short circuit false tripping machine, generator outlet are provided with three-phase electricity
Three output ends of pressure, it is characterised in that described device includes：Alarm unit and corresponding three single-phase voltage mutual inductances
Device, three fuses, three current sensors and three auxiliary reclays；Wherein, each auxiliary reclay at least has one
Normally opened contact and a normally-closed contact；
Wherein, each single-phase potential transformer comprises at least first side winding and secondary side winding, and three single-phase voltage mutual inductances
The secondary side winding of device connects for open-delta；And three output ends of three-phase voltage and three single-phase potential transformers
Correspond to concatenation three fuses between high-pressure side respectively, the low-pressure end and star neutral point of three single-phase potential transformers it
Between correspond to concatenation three current sensors respectively；
The signal output part of each current sensor connects the drive end of a corresponding auxiliary reclay, and three auxiliary reclays
Corresponding three normally-closed contacts are serially connected to form series arm respectively, and two terminals of the series arm are designated as A1 respectively
End and A2 ends；Corresponding three normally opened contacts connect together to form parallel branch three auxiliary reclays respectively, the parallel connection
Two terminals of branch road are designated as B1 ends and B2 ends respectively；
The B1 ends and B2 ends of the parallel branch are connected respectively the alarm unit for voltage transformer turn-to-turn short circuit alarm
Two alarm signal trigger terminals；
The open delta output end of the secondary side winding of three single-phase potential transformers is connected with a residual voltage relay
The drive end of device, and one end of a normally opened contact of the residual voltage relay connects the A1 ends of the series arm, should
One of the breaker of the other end connection generator of normally opened contact, which disconnects, starts terminal；Another of the breaker of generator is disconnected
Open the A2 ends that moved end connects the series arm.
2. a kind of device for preventing generator outlet voltage transformer turn-to-turn short circuit false tripping machine according to claim 1, its
It is characterised by, when three single-phase potential transformers are grad insulated voltage transformer, three single-phase voltage mutual inductances
The star neutral point common ground of three first side windings corresponding to device.
3. a kind of device for preventing generator outlet voltage transformer turn-to-turn short circuit false tripping machine according to claim 1, its
It is characterised by, when three single-phase potential transformers are all insulation voltage transformer, three single-phase potential transformers
The star neutral point of corresponding three first side windings is hanging, and the signal output part of each current sensor passes through optical fiber list
The drive end of its corresponding auxiliary reclay of member connection.
4. a kind of device for preventing generator outlet voltage transformer turn-to-turn short circuit false tripping machine according to claim 3, its
It is characterised by, the fiber unit includes transmitting terminal optical-electrical converter, optical fiber cable and receiving terminal optical-electrical converter.
5. a kind of device for preventing generator outlet voltage transformer turn-to-turn short circuit false tripping machine according to claim 1, its
It is characterised by, when three single-phase potential transformers are all insulation voltage transformer, three single-phase potential transformers
The star neutral point of corresponding three first side windings is hanging, and the signal output part of each current sensor is by wirelessly passing
Defeated unit connects the drive end of its corresponding auxiliary reclay.
6. a kind of device for preventing generator outlet voltage transformer turn-to-turn short circuit false tripping machine according to claim 5, its
It is characterised by, the wireless transmission unit includes wireless launcher and wireless receiver.
7. a kind of method for preventing generator outlet voltage transformer turn-to-turn short circuit false tripping machine, methods described is applied to right such as will
Ask in the device described in 1, it is characterised in that methods described includes：
When the first side winding turn-to-turn short circuit of any one single-phase potential transformer, the output current of corresponding current sensor detection
When value is more than setting current；
Auxiliary reclay action corresponding to the output current control of the current sensor, makes the normally closed of corresponding auxiliary reclay
Contact disconnects, normally opened contact closure；
Wherein, the normally-closed contact of the auxiliary reclay disconnects the false tripping machine for preventing generator stator ground protection location,
The generator stator ground protection location by the secondary side winding of three single-phase potential transformers, residual voltage relay and
The breaker composition of generator；The normally opened contact of the auxiliary reclay closes carries out voltage transformer for triggering alarm unit
Turn-to-turn short circuit is alarmed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711214338.7A CN107884665B (en) | 2017-11-28 | 2017-11-28 | Device and method for preventing turn-to-turn short circuit of generator outlet voltage transformer from mistakenly tripping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711214338.7A CN107884665B (en) | 2017-11-28 | 2017-11-28 | Device and method for preventing turn-to-turn short circuit of generator outlet voltage transformer from mistakenly tripping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107884665A true CN107884665A (en) | 2018-04-06 |
| CN107884665B CN107884665B (en) | 2024-03-08 |
Family
ID=61775685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711214338.7A Active CN107884665B (en) | 2017-11-28 | 2017-11-28 | Device and method for preventing turn-to-turn short circuit of generator outlet voltage transformer from mistakenly tripping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107884665B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109375134A (en) * | 2018-10-08 | 2019-02-22 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Generator outlet voltage transformer internal fault on-line monitoring method and system |
| CN110571761A (en) * | 2019-08-22 | 2019-12-13 | 北京四方继保自动化股份有限公司 | generation and transformation group protection method applied to international nuclear power million units |
| CN112130020A (en) * | 2020-09-24 | 2020-12-25 | 中车大同电力机车有限公司 | High-voltage electrical appliance early warning method and device for rolling stock, medium and electronic equipment |
| CN114325466A (en) * | 2021-11-25 | 2022-04-12 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Generator outlet mutual inductor turn-to-turn short circuit self-checking system |
Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2523778A (en) * | 1949-02-23 | 1950-09-26 | Gen Electric | Grounding transformer and protective system therefor |
| CA2024351A1 (en) * | 1989-08-30 | 1991-03-01 | Makoto Terada | Differential protective relay apparatus |
| JP2000262097A (en) * | 1999-03-10 | 2000-09-22 | Hitachi Ltd | Operation protective device for ac generator |
| RU2171003C1 (en) * | 2000-06-08 | 2001-07-20 | Шинкаренко Сергей Михайлович | Method and device for differential protection of three-phase power transmission line |
| CN1728493A (en) * | 2005-04-08 | 2006-02-01 | 南京南瑞继保电气有限公司 | Turns protection method of composite zero sequence voltage in generator |
| CN201038735Y (en) * | 2007-05-29 | 2008-03-19 | 山西兰花科技创业股份有限公司 | Locking and interlocking device for coal mine main draught fan and down-hole power supply |
| CN101651329A (en) * | 2008-12-03 | 2010-02-17 | 南京南瑞继保电气有限公司 | Judgment method of line breakage of special TV for inter-turn protection of generator |
| CN101741062A (en) * | 2009-12-30 | 2010-06-16 | 深圳南瑞科技有限公司 | Inter-turn protection method for power generator |
| CN102435903A (en) * | 2011-11-14 | 2012-05-02 | 国网电力科学研究院 | Online monitoring device for turn-to-turn short circuit of voltage transformer |
| CN102694369A (en) * | 2011-03-23 | 2012-09-26 | 宝山钢铁股份有限公司 | Method for preventing low-voltage protection misoperation of motor caused by PT disconnection |
| CN102868140A (en) * | 2012-09-07 | 2013-01-09 | 常熟市森源电气科技有限公司 | Overload alarming device for power transformer |
| CN103091595A (en) * | 2012-07-23 | 2013-05-08 | 南京南瑞继保电气有限公司 | Discriminated method of generator terminal voltage mutual inductor once-off-line |
| CN103117532A (en) * | 2013-02-28 | 2013-05-22 | 龙滩水电开发有限公司 | Zero-sequence voltage trip protection method for low-voltage side of transformers |
| CN202997507U (en) * | 2012-12-12 | 2013-06-12 | 浙江大洋生物科技集团股份有限公司 | Residual current action protective device |
| CN203813297U (en) * | 2014-02-20 | 2014-09-03 | 国投新集能源股份有限公司 | A high voltage switch handcart in-place locking device |
| CN204008951U (en) * | 2014-08-29 | 2014-12-10 | 国家电网公司 | A kind of secondary circuit 3U0 broken string alarm device |
| CN104348149A (en) * | 2014-11-06 | 2015-02-11 | 国家电网公司 | Primary side neutral point ground control system for 10kV potential transformer (PT) |
| CN104808105A (en) * | 2014-01-27 | 2015-07-29 | 南京南瑞继保电气有限公司 | Generator terminal potential transformer inter-turn short circuit on-line identification method |
| CN105655979A (en) * | 2016-03-15 | 2016-06-08 | 厦门大学嘉庚学院 | Device capable of distinguishing overcurrent and overload protection action signals of high-voltage motor and method |
| CN106229944A (en) * | 2016-08-02 | 2016-12-14 | 浙江华采科技有限公司 | A kind of earthed voltage transformer exciting current protection device |
-
2017
- 2017-11-28 CN CN201711214338.7A patent/CN107884665B/en active Active
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2523778A (en) * | 1949-02-23 | 1950-09-26 | Gen Electric | Grounding transformer and protective system therefor |
| CA2024351A1 (en) * | 1989-08-30 | 1991-03-01 | Makoto Terada | Differential protective relay apparatus |
| JP2000262097A (en) * | 1999-03-10 | 2000-09-22 | Hitachi Ltd | Operation protective device for ac generator |
| RU2171003C1 (en) * | 2000-06-08 | 2001-07-20 | Шинкаренко Сергей Михайлович | Method and device for differential protection of three-phase power transmission line |
| CN1728493A (en) * | 2005-04-08 | 2006-02-01 | 南京南瑞继保电气有限公司 | Turns protection method of composite zero sequence voltage in generator |
| CN201038735Y (en) * | 2007-05-29 | 2008-03-19 | 山西兰花科技创业股份有限公司 | Locking and interlocking device for coal mine main draught fan and down-hole power supply |
| CN101651329A (en) * | 2008-12-03 | 2010-02-17 | 南京南瑞继保电气有限公司 | Judgment method of line breakage of special TV for inter-turn protection of generator |
| CN101741062A (en) * | 2009-12-30 | 2010-06-16 | 深圳南瑞科技有限公司 | Inter-turn protection method for power generator |
| CN102694369A (en) * | 2011-03-23 | 2012-09-26 | 宝山钢铁股份有限公司 | Method for preventing low-voltage protection misoperation of motor caused by PT disconnection |
| CN102435903A (en) * | 2011-11-14 | 2012-05-02 | 国网电力科学研究院 | Online monitoring device for turn-to-turn short circuit of voltage transformer |
| CN103091595A (en) * | 2012-07-23 | 2013-05-08 | 南京南瑞继保电气有限公司 | Discriminated method of generator terminal voltage mutual inductor once-off-line |
| CN102868140A (en) * | 2012-09-07 | 2013-01-09 | 常熟市森源电气科技有限公司 | Overload alarming device for power transformer |
| CN202997507U (en) * | 2012-12-12 | 2013-06-12 | 浙江大洋生物科技集团股份有限公司 | Residual current action protective device |
| CN103117532A (en) * | 2013-02-28 | 2013-05-22 | 龙滩水电开发有限公司 | Zero-sequence voltage trip protection method for low-voltage side of transformers |
| CN104808105A (en) * | 2014-01-27 | 2015-07-29 | 南京南瑞继保电气有限公司 | Generator terminal potential transformer inter-turn short circuit on-line identification method |
| CN203813297U (en) * | 2014-02-20 | 2014-09-03 | 国投新集能源股份有限公司 | A high voltage switch handcart in-place locking device |
| CN204008951U (en) * | 2014-08-29 | 2014-12-10 | 国家电网公司 | A kind of secondary circuit 3U0 broken string alarm device |
| CN104348149A (en) * | 2014-11-06 | 2015-02-11 | 国家电网公司 | Primary side neutral point ground control system for 10kV potential transformer (PT) |
| CN105655979A (en) * | 2016-03-15 | 2016-06-08 | 厦门大学嘉庚学院 | Device capable of distinguishing overcurrent and overload protection action signals of high-voltage motor and method |
| CN106229944A (en) * | 2016-08-02 | 2016-12-14 | 浙江华采科技有限公司 | A kind of earthed voltage transformer exciting current protection device |
Non-Patent Citations (7)
| Title |
|---|
| 刘宝华;杨洪亮;王福才;: "发电机出口PT匝间短路故障分析", 电站系统工程, no. 06 * |
| 卓华;: "电压互感器熔断器放电导致保护动作的分析与防范" * |
| 卓华;: "电压互感器熔断器放电导致保护动作的分析与防范", 神华科技, no. 06 * |
| 时盛志;韩素贤;: "发电机纵向零序电压型匝间保护误动的分析及技术改造", 数字技术与应用, no. 09 * |
| 陈瑞新;: "发电机匝间保护动作跳机原因分析" * |
| 陈瑞新;: "发电机匝间保护动作跳机原因分析", 热电技术, no. 04 * |
| 韩恒林等: "《7RE2800电压闭锁继电器的应用》", vol. 30, no. 4 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109375134A (en) * | 2018-10-08 | 2019-02-22 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Generator outlet voltage transformer internal fault on-line monitoring method and system |
| CN110571761A (en) * | 2019-08-22 | 2019-12-13 | 北京四方继保自动化股份有限公司 | generation and transformation group protection method applied to international nuclear power million units |
| CN110571761B (en) * | 2019-08-22 | 2021-12-28 | 北京四方继保自动化股份有限公司 | Generation and transformation group protection method applied to international nuclear power million units |
| CN112130020A (en) * | 2020-09-24 | 2020-12-25 | 中车大同电力机车有限公司 | High-voltage electrical appliance early warning method and device for rolling stock, medium and electronic equipment |
| CN114325466A (en) * | 2021-11-25 | 2022-04-12 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Generator outlet mutual inductor turn-to-turn short circuit self-checking system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107884665B (en) | 2024-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11588324B2 (en) | Electrical fault detection and recovery power distribution system and its construction method | |
| CN102694369B (en) | Method for preventing low-voltage protection misoperation of motor caused by PT disconnection | |
| CN107884665A (en) | Prevent the device and method of generator outlet voltage transformer turn-to-turn short circuit false tripping machine | |
| CN101587157B (en) | Bus differential protection polarity test method | |
| US6667866B1 (en) | Virtual ground following single-phase trip | |
| CN103412239B (en) | Detecting and positioning method of bus coupler flashover fault in subway alternating current power system | |
| CN111313379B (en) | Disconnection protection method for comparing line voltage on two sides of line and spare power automatic switching | |
| CN103354352A (en) | Distributed intelligence based power distribution network safety protection method | |
| CN105576621A (en) | Arc light protection method | |
| CN105529681A (en) | Leakage protection circuit for low-voltage ungrounded system and realization method | |
| CN100424956C (en) | Fault tolerant re-judging negative sequence direction locking type longitudinal zero voltage inter-turn protection for generator | |
| CN208257390U (en) | A kind of device preventing generator outlet voltage transformer turn-to-turn short circuit false tripping machine | |
| US20230318289A1 (en) | End of Line Protection | |
| RU2737951C1 (en) | Electrical installation control and protection system | |
| Haider et al. | Protection of DERs | |
| US4796147A (en) | Method for detecting voltage losses in a low voltage distribution system | |
| Udren et al. | Roadmap for Advancement of Low-Voltage Secondary Distribution Network Protection | |
| CN110098599A (en) | A kind of fault handling method and system of overhead lines combined with cable | |
| JP5442675B2 (en) | Insulation resistance measurement system | |
| CN111477523B (en) | Inverter box transformer substation all-in-one machine and protection method thereof | |
| CN111224384B (en) | Method for comparing line voltage vector difference on two sides of line and protecting line breakage by adopting loop closing and opening operation | |
| CN103018631A (en) | System for 10kV fault line detection | |
| CN208157355U (en) | High voltage drop-out type fuse cutout and proximal end protective device | |
| CN102243287A (en) | Method for monitoring multipoint grounding failure of magnetic suspension stator coil | |
| CN204794071U (en) | Digital arc extinction cabinet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20231225 Address after: No.155, Fengcheng seventh Road, economic and Technological Development Zone, Xi'an City, Shaanxi Province, 710021 Applicant after: Datang Northwest (Xi'an) Electric Power Test and Research Institute Co.,Ltd. Address before: No. 155, Fengcheng 7th Road, Xi'an Economic Development Zone, Xi'an, Shaanxi 710021 Applicant before: NORTHWEST BRANCH OF CHINA DATANG CORPORATION SCIENCE AND TECHNOLOGY Research Institute |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |