CN107785868A - The transformer leakage protection system of real-time earthing water conservancy diversion - Google Patents
The transformer leakage protection system of real-time earthing water conservancy diversion Download PDFInfo
- Publication number
- CN107785868A CN107785868A CN201711094352.8A CN201711094352A CN107785868A CN 107785868 A CN107785868 A CN 107785868A CN 201711094352 A CN201711094352 A CN 201711094352A CN 107785868 A CN107785868 A CN 107785868A
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- CN
- China
- Prior art keywords
- transformer
- leakage current
- water conservancy
- conservancy diversion
- leakage
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- 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.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/14—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to occurrence of voltage on parts normally at earth potential
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
-
- 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
- H02H7/04—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 transformers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses the transformer leakage of real-time earthing water conservancy diversion to protect system; including the leakage current Acquisition Circuit being connected on transformer PLC control devices and leakage current harvester; and the leakage current water conservancy diversion earthing or grounding means on transformer case is connected to, leakage current water conservancy diversion earthing or grounding means is connected in the leakage current Acquisition Circuit and PLC control devices of transformer by leakage current normal open switch and obtains water conservancy diversion status signal；Leakage current Acquisition Circuit, including inductance sensor and current sensor；Leakage current harvester, including at least three conductive members that are evenly arranged of ambient envelope along transformer, each conductive member respectively connect the inductance sensor and current sensor of leakage current Acquisition Circuit.The transformer leakage protection system of the real-time earthing water conservancy diversion of the present invention, on the one hand realizes and leakage current is carried out into water conservancy diversion ground connection in real time, on the other hand set up the protection circuit of leakage current leakage not in time, reliability is high, and implementation cost is low.
Description
Technical field
The present invention relates to transformer leakage protection device and systems technology field, more particularly to real-time earthing water conservancy diversion
Transformer leakage protects system.
Background technology
Power system largely uses power system transformer at present, and the winding in transformer is also the most basic of transformer
One of part.It is the circuit part of transformer, and the copper cash or aluminum steel typically wrapped up with insulating paper is coiled into.It is connected to high-voltage fence
Winding be high pressure winding, the winding for being connected to low voltage electric network is low pressure winding.Large-scale power transformer uses Concentrical winding.It
It is that high and low pressure winding is fitted concentrically in iron core column.Usual low pressure winding is close to iron core, and high pressure winding is in outer side.
Present power system transformer, which is much located under complex environment, to be run, and is inevitably held in this case
Easily there is the breakage of the winding insulation paper in transformer or corrosion becomes fragile, electric leakage defect will be produced, there is presently no for electric power
The leakage protection technology of system transformer winding.
There are some protectors to low voltage distribution transformer (abbreviation transformer).For example have in high-pressure side various
Primary cut-out, arrester etc., low-pressure side have various fuses, A.C. contactor, phase demodulation amplitude discrimination relay etc..In spite of such
Safeguard measure, but because the various complex circuit of transformer capacity grade, the various safeguard measures supporting with it are difficult to accomplish ten thousand nothings
One is lost, and especially the leak current fault of transformer, any position are likely to occur, and in general earth leakage protective is in main circuit,
And whether leakage protection circuit can not effectively monitor in real time in itself, so as to cause transformer leakage failure timely
Discovery, cause the generation of accident, especially for transformer maintenance personnel and transformer surrounding people.Easily cause electric shock
Accident.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the invention provides one kind in real time to connect leakage current progress water conservancy diversion
The transformer leakage protection system on ground.
The technical solution adopted in the present invention is：The transformer leakage protection system of real-time earthing water conservancy diversion, including be connected to
Leakage current Acquisition Circuit and leakage current harvester on transformer PLC control devices, and be connected on transformer case
Leakage current water conservancy diversion earthing or grounding means, the leakage current that leakage current water conservancy diversion earthing or grounding means is connected to transformer by leakage current normal open switch are adopted
Water conservancy diversion status signal is obtained on collector and PLC control devices；
Leakage current Acquisition Circuit, including inductance sensor and current sensor；
Leakage current harvester, including at least three conductive members that are evenly arranged of ambient envelope along transformer, each is led
Electric components respectively connect the inductance sensor and current sensor of leakage current Acquisition Circuit.
Further, leakage current water conservancy diversion earthing or grounding means includes a fixed support and a ground connection guide rod, fixed support are tight
Gu in the bottom position of transformer shell, and it is grounded guide rod and is connected to fixed support by discharge the rotatable ground connection of motor
On；And release motor connection crosses the instruction that leakage current normal open switch obtains working condition.
Further, guide rod generally two-part structure is grounded, one section is connected to fixed support, the other end for upset
For earth terminal, earth terminal elongated member made of a kind of or several in cable wire, steel plate, square steel.
Further, leakage current Acquisition Circuit also connects the power supply of transformer by overcurrent protective device, works as electric leakage
The leakage current of conductance stream earthing or grounding means water conservancy diversion up to the time still can not reach safe current more than 1 second when, transformer PLC control dress
Put and start overcurrent protective device closing transformer.
Further, audible alarm unit and flashing alarm device are also connected with leakage current Acquisition Circuit.
Compared with prior art, the beneficial effects of the invention are as follows：The transformer leakage of the real-time earthing water conservancy diversion of the present invention is protected
Protecting system, on the one hand realize and leakage current is subjected to water conservancy diversion ground connection in real time, on the other hand set up leakage current and reveal not in time
Protection circuit, i.e., leakage current water conservancy diversion earthing or grounding means is connected to the leakage current Acquisition Circuit of transformer by leakage current normal open switch
With on PLC control devices obtain water conservancy diversion status signal, while the leakage current by overcurrent protective device connect transformer confession
Power supply, when the leakage current of leakage current water conservancy diversion earthing or grounding means water conservancy diversion still can not reach safe current up to the time more than 1 second,
Transformer PLC control devices start overcurrent protective device and close transformer, reach deep layer protection transformer, are the electric leakage of transformer
Provide safe protection system.The leakage protection system of the invention, securely and reliably, implementation cost, have preferably beneficial
Effect.
Brief description of the drawings
Fig. 1 is that the transformer leakage of real-time earthing water conservancy diversion protects the circuit theory diagrams of system.
Embodiment
In order to deepen the understanding of the present invention, the present invention is further described with reference to the accompanying drawings and examples, the implementation
Example is only used for explaining the present invention, and protection scope of the present invention is not formed and limited.
As shown in figure 1, the transformer leakage protection system of real-time earthing water conservancy diversion, including it is connected to transformer PLC control dresses
The leakage current Acquisition Circuit 2 and leakage current harvester 9 on 1 are put, and the leakage current water conservancy diversion being connected on transformer case connects
Ground device 3, leakage current water conservancy diversion earthing or grounding means 3 are connected to the He of leakage current Acquisition Circuit 2 of transformer by leakage current normal open switch 4
Water conservancy diversion status signal is obtained on PLC control devices 1；
Leakage current Acquisition Circuit 2, including inductance sensor and current sensor；
Leakage current harvester 9, including at least three conductive members that are evenly arranged of ambient envelope along transformer, each is led
Electric components respectively connect the inductance sensor and current sensor of leakage current Acquisition Circuit 2.
In the above-described embodiments, leakage current water conservancy diversion earthing or grounding means 3 includes a fixed support and a ground connection guide rod, fixed
Support is fastened on the bottom position of transformer shell, and is grounded guide rod and is connected to fixation by discharge the rotatable ground connection of motor
On support；And release motor connection crosses the instruction that leakage current normal open switch 4 obtains working condition.
In the above-described embodiments, guide rod generally two-part structure is grounded, one section is connected to fixed support for upset,
The other end is earth terminal, earth terminal elongated member made of a kind of or several in cable wire, steel plate, square steel.
In the above-described embodiments, leakage current Acquisition Circuit 2 also connects the power supply of transformer by overcurrent protective device 5
6, when the leakage current of the water conservancy diversion of leakage current water conservancy diversion earthing or grounding means 3 still can not reach safe current up to the time more than 1 second, transformer
PLC control devices start overcurrent protective device and close transformer.
In the above-described embodiments, audible alarm unit 7 and flashing alarm device 8 are also connected with leakage current Acquisition Circuit 2.
What embodiments of the invention were announced is preferred embodiment, but is not limited thereto, the ordinary skill people of this area
Member, easily according to above-described embodiment, understand the spirit of the present invention, and make different amplification and change, but as long as not departing from this
The spirit of invention, all within the scope of the present invention.
Claims (5)
1. the transformer leakage protection system of real-time earthing water conservancy diversion, it is characterised in that：Including being connected to transformer PLC control devices
（1）On leakage current Acquisition Circuit（2）With leakage current harvester（9）, and the electric leakage conductance being connected on transformer case
Flow earthing or grounding means（3）, leakage current water conservancy diversion earthing or grounding means（3）Pass through leakage current normal open switch（4）It is connected to the leakage current of transformer
Acquisition Circuit（2）With PLC control devices（1）Upper acquisition water conservancy diversion status signal；
Leakage current Acquisition Circuit（2）, including inductance sensor and current sensor；
Leakage current harvester（9）, including at least three conductive members that are evenly arranged of ambient envelope along transformer, each
Conductive member respectively connects leakage current Acquisition Circuit（2）Inductance sensor and current sensor.
2. the transformer leakage protection system of real-time earthing water conservancy diversion according to claim 1, it is characterised in that：Leak electricity conductance
Flow earthing or grounding means（3）Including a fixed support and a ground connection guide rod, fixed support is fastened on the bottom position of transformer shell
Put, and be grounded guide rod by discharging being connected on fixed support of the rotatable ground connection of motor；And release motor connection is crossed Lou
Electric current normal open switch（4）Obtain the instruction of working condition.
3. the transformer leakage protection system of real-time earthing water conservancy diversion according to claim 2, it is characterised in that：It is grounded guide rod
Generally two-part structure, one section is connected to fixed support for upset, and the other end is earth terminal, and earth terminal is by cable wire, steel
A kind of or several manufactured elongated member in plate, square steel.
4. the transformer leakage protection system of real-time earthing water conservancy diversion according to claim 1, it is characterised in that：Leakage current is adopted
Collector（2）Also pass through overcurrent protective device（5）Connect the power supply of transformer（6）, when leakage current water conservancy diversion earthing or grounding means（3）
The leakage current of water conservancy diversion up to the time still can not reach safe current more than 1 second when, transformer PLC control devices start over current protection
Protect device and close transformer.
5. the transformer leakage protection system of the real-time earthing water conservancy diversion according to claim 1-4 any one, its feature exist
In：Leakage current Acquisition Circuit（2）On be also connected with audible alarm unit（7）And flashing alarm device（8）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711094352.8A CN107785868A (en) | 2017-11-09 | 2017-11-09 | The transformer leakage protection system of real-time earthing water conservancy diversion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711094352.8A CN107785868A (en) | 2017-11-09 | 2017-11-09 | The transformer leakage protection system of real-time earthing water conservancy diversion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107785868A true CN107785868A (en) | 2018-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711094352.8A Pending CN107785868A (en) | 2017-11-09 | 2017-11-09 | The transformer leakage protection system of real-time earthing water conservancy diversion |
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| CN (1) | CN107785868A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112260230A (en) * | 2020-09-29 | 2021-01-22 | 深圳供电局有限公司 | Electric equipment protection device and system |
| CN112952746A (en) * | 2021-01-27 | 2021-06-11 | 广东电网有限责任公司 | Electric shock protection device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201877794U (en) * | 2010-11-23 | 2011-06-22 | 东莞基业电气设备有限公司 | Intelligent controller of residual current circuit breaker |
| CN102916396A (en) * | 2012-11-13 | 2013-02-06 | 西安上尚机电有限公司 | Current-leakage protection method of winding of electric power system transformer |
| CN104749484A (en) * | 2015-04-22 | 2015-07-01 | 国家电网公司 | Electric-leakage monitoring device |
| CN204855698U (en) * | 2015-07-17 | 2015-12-09 | 国网山西省电力公司大同供电公司 | Transformer leakage detection device |
| CN105914706A (en) * | 2016-06-27 | 2016-08-31 | 毛春梅 | Electric-shock-preventing power supply transformer |
| CN106970261A (en) * | 2017-05-26 | 2017-07-21 | 湘潭市恒创电气设备有限公司 | Earth leakage detecting system for train |
-
2017
- 2017-11-09 CN CN201711094352.8A patent/CN107785868A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201877794U (en) * | 2010-11-23 | 2011-06-22 | 东莞基业电气设备有限公司 | Intelligent controller of residual current circuit breaker |
| CN102916396A (en) * | 2012-11-13 | 2013-02-06 | 西安上尚机电有限公司 | Current-leakage protection method of winding of electric power system transformer |
| CN104749484A (en) * | 2015-04-22 | 2015-07-01 | 国家电网公司 | Electric-leakage monitoring device |
| CN204855698U (en) * | 2015-07-17 | 2015-12-09 | 国网山西省电力公司大同供电公司 | Transformer leakage detection device |
| CN105914706A (en) * | 2016-06-27 | 2016-08-31 | 毛春梅 | Electric-shock-preventing power supply transformer |
| CN106970261A (en) * | 2017-05-26 | 2017-07-21 | 湘潭市恒创电气设备有限公司 | Earth leakage detecting system for train |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112260230A (en) * | 2020-09-29 | 2021-01-22 | 深圳供电局有限公司 | Electric equipment protection device and system |
| CN112952746A (en) * | 2021-01-27 | 2021-06-11 | 广东电网有限责任公司 | Electric shock protection device |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180309 |
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| RJ01 | Rejection of invention patent application after publication |