CN109830938A - Main transformer body grave gas protects circuit and method - Google Patents
Main transformer body grave gas protects circuit and method Download PDFInfo
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- CN109830938A CN109830938A CN201910137529.0A CN201910137529A CN109830938A CN 109830938 A CN109830938 A CN 109830938A CN 201910137529 A CN201910137529 A CN 201910137529A CN 109830938 A CN109830938 A CN 109830938A
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- breaker trip
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000004224 protection Effects 0.000 claims abstract description 18
- 230000005611 electricity Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 230000007257 malfunction Effects 0.000 abstract description 3
- 101100100125 Mus musculus Traip gene Proteins 0.000 description 62
- 238000004804 winding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
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- 238000012806 monitoring device Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention discloses a kind of main transformer body grave gas protection circuit and method, in the circuit, Buchholz relay electric contact includes concatenated two electric contacts.Buchholz relay electric contact and the series connection of grave gas relay coil are used as the first branch, grave gas relay normally open contact and the series connection of circuit breaker trip exit relay coil are used as second branch, first circuit breaker trip exit relay normal opened contact, first circuit breaker trip guard relay coil, first breaker assists normal opened contact and the series connection of the first breaking coil to be used as third branch, second circuit breaker trip exit relay normal opened contact, second circuit breaker trip guard relay coil, second breaker assists normal opened contact and the series connection of the second breaking coil to be used as the 4th branch, the first branch, second branch, third branch and the 4th branch are in parallel with DC power supply.Main transformer body grave gas protection circuit of the invention and method, two electric contacts are closed ability triggering following trip operation, and high reliablity avoids the occurrence of malfunction.
Description
Technical field
The present invention relates to tranformer protection technical field more particularly to main transformer body grave gas protection circuit and methods.
Background technique
Main transformer, abbreviation main transformer (GSU) are the total downconverters for being mainly used for power transmission and transformation in a unit or substation
The core of device and substation.Protection is the main protection of main transformer, can effectively reflect power transformer interior fault.Gas
Protection includes that light gas protecting and grave gas are protected.Light gas protecting acts on signal, and grave gas acts on tripping.
The Buchholz relay in grave gas protection that the prior art provides uses two pairs of normal opened contacts used in parallel, or
A pair of of normal opened contact uses, and another pair normal opened contact is spare.When transformer breaks down, Transformer Heavy Gas relay it is normally opened
Contact, circuit breaker trip, disconnecting transformer power supply, to prevent safety accident.
The inventor finds that the existing technology has at least the following problems: when external short-circuit failure near region occurs for transformer, wearing
More property short circuit current is larger, winding temperature rapid increase, makes the volume expansion of oil, and the oil stream speed between oil clearance is accelerated, and works as oil clearance
When the pressure difference generated on the outside of interior and winding changes greatly, grave gas protects possible malfunction, causes breaker mistrip power loss, influences
Power supply reliability.
Summary of the invention
To solve above-mentioned the technical problems existing in the prior art, the present invention provides a kind of protections of main transformer body grave gas
Circuit and method.Specific technical solution is as follows:
In a first aspect, providing a kind of main transformer body grave gas protection circuit, comprising: DC power supply, Buchholz relay electricity
Contact, microcomputer protecting controller, the first breaker auxiliary normal opened contact, the second breaker auxiliary normal opened contact, the first tripping
Coil and the second breaking coil；The Buchholz relay electric contact includes concatenated two electric contacts；The digital relay and monitoring
Device includes grave gas relay coil, grave gas relay normally open contact, circuit breaker trip exit relay coil, first disconnected
Road device tripping exit relay normal opened contact, the second circuit breaker trip exit relay normal opened contact, the first circuit breaker trip are protected
Relay coil and the second circuit breaker trip guard relay coil are held, it is described heavy when the grave gas relay coil obtains electric
Buchholz relay normal opened contact closure, when the circuit breaker trip exit relay coil obtains electric, first circuit breaker trip
Exit relay normal opened contact and the second circuit breaker trip exit relay normal opened contact closure；The Buchholz relay electricity
Contact and grave gas relay coil series connection are used as the first branch, the grave gas relay normally open contact and the open circuit
Device trips the series connection of exit relay coil as second branch, the first circuit breaker trip exit relay normal opened contact, institute
State the first circuit breaker trip guard relay coil, first breaker auxiliary normal opened contact and the first breaking coil string
Connection be used as third branch, the second circuit breaker trip exit relay normal opened contact, second circuit breaker trip keep after
Electric apparatus coil, second breaker auxiliary normal opened contact and second breaking coil series connection are used as the 4th branch, and described the
One branch, the second branch, the third branch and the 4th branch are in parallel with the DC power supply.
In a kind of possible design, the first tripping is in series in the second branch in flakes.
In a kind of possible design, the third branch road is in series with the second tripping in flakes.
In a kind of possible design, the 4th road is in series with third tripping in flakes.
In a kind of possible design, the Buchholz relay electric contact is QYJ1-80 type Buchholz relay or QJ-80 type
The electric contact of Buchholz relay.
Second aspect provides a kind of main transformer body grave gas guard method, which comprises
When oil tank of transformer internal fault to predeterminable level, Buchholz relay electric contact closure, the grave gas relay
Coil obtains electric；
The grave gas relay coil obtain it is electric after, grave gas relay normally open contact closure, the breaker is jumped
Lock exit relay coil obtains electric；
The circuit breaker trip exit relay coil obtain it is electric after, the first circuit breaker trip exit relay is normally opened to be connect
Point closure, the first circuit breaker trip guard relay coil and first breaking coil obtain electric, trip(ping) circuit connection, disconnected
The movement of road device operating mechanism, main transformer high-pressure side circuit breaker trip；
The circuit breaker trip exit relay coil obtain it is electric after, the second circuit breaker trip exit relay is normally opened to be connect
Point closure, the second circuit breaker trip guard relay coil and second breaking coil obtain electric, trip(ping) circuit connection, disconnected
The movement of road device operating mechanism, main transformer low-pressure side circuit breaker trip.
In a kind of possible design, when the main transformer body grave gas protects circuit normal operation, first tripping
In flakes, second tripping is tripped in flakes in flakes with the third, is in closed communicating state；It puts into operation in new main transformer, modify greatly
When making power transmission when putting into operation, protective plug-in unit replacement, refueling, will the first tripping piece in flakes, described second trip in flakes
It is opened in flakes with third tripping.
The major advantage of technical solution of the present invention is as follows:
When inside transformer generation catastrophe failure may be implemented in main transformer body grave gas protection circuit of the invention and method,
Circuit breaker trip, disconnecting transformer power supply.And Buchholz relay electric contact includes concatenated two electric contacts, two electric contacts are same
When closure could triggering following trip operation, stability and safety are higher, avoid the occurrence of nonaction.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes of the invention one
Point, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, does not constitute improper limitations of the present invention.Attached
In figure:
Fig. 1 is the circuit diagram that main transformer body grave gas provided by one embodiment of the present invention protects circuit.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only of the invention
A part of the embodiment, instead of all the embodiments.Based on the embodiment of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
Below in conjunction with attached drawing, the technical solution of embodiment that the present invention will be described in detail offer.
In a first aspect, the embodiment of the invention provides a kind of main transformer body grave gas to protect circuit, it as shown in Fig. 1, should
Protection circuit includes: that DC power supply, Buchholz relay electric contact, microcomputer protecting controller, the first breaker auxiliary normally opened connect
Point QF1, the second breaker auxiliary normal opened contact QF2, the first breaking coil TQ1 and the second breaking coil TQ2.Buchholz relay electricity
Contact includes concatenated two electric contacts.Microcomputer protecting controller includes that grave gas relay coil J, grave gas relay are normal
Open contact J1, circuit breaker trip goes out relay coil TJ, the normally opened point of interface TJ1 of the first circuit breaker trip exit relay, second
Circuit breaker trip exit relay normal opened contact TJ2, the first circuit breaker trip guard relay coil TBJ1 and the second breaker
Trip guard relay coil TBJ2, and when grave gas relay coil J obtains electric, grave gas relay normally open contact J1 closure is broken
When road device tripping exit relay coil TJ obtains electric, the open circuit of the first circuit breaker trip exit relay normal opened contact TJ1 and second
Device tripping exit relay normal opened contact TJ2 closure.Buchholz relay electric contact and grave gas relay coil J series connection are as the
One branch, grave gas relay normally open contact J1 and circuit breaker trip exit relay coil TJ series connection are used as second branch, the
One circuit breaker trip exit relay normal opened contact TJ1, the first circuit breaker trip guard relay coil TBJ1, the first breaker
Normal opened contact QF1 and the first breaking coil TQ1 series connection is assisted to be used as third branch, the second circuit breaker trip exit relay is normally opened
Contact TJ2, the second circuit breaker trip guard relay coil TBJ2, the tripping of auxiliary normal opened contact QF2 and second of the second breaker
Coil TQ2 series connection is used as the 4th branch, and the first branch, second branch, third branch and the 4th branch are in parallel with DC power supply.
The working principle of main transformer body grave gas provided in an embodiment of the present invention protection circuit is illustrated below:
First breaker assists normal opened contact QF1 and the second breaker auxiliary normal opened contact QF2 in transformer and high-voltage electricity
In closed state when source is connected to normal work with workload.When oil tank of transformer internal fault to predeterminable level, gas after
Two electric contacts of electric appliance electric contact are closed, and grave gas relay coil J obtains electric.Grave gas relay coil J obtain it is electric after, weight watt
This relay normally open contact J1 closure, circuit breaker trip exit relay coil TJ obtains electric.Circuit breaker trip exit relay line
Circle TJ obtain it is electric after, the first circuit breaker trip exit relay normal opened contact TJ1 closure, the first circuit breaker trip guard relay line
Circle TBJ1 and the first breaking coil TQ1 obtains electric, trip(ping) circuit connection, circuit breaker operation mechanism movement, main transformer high-pressure side breaker
Tripping.At the same time, circuit breaker trip exit relay coil TJ obtain it is electric after, the second circuit breaker trip exit relay is normally opened to be connect
Point TJ2 closure, the second circuit breaker trip guard relay coil TBJ2 and the second breaking coil TQ2 obtain electric, trip(ping) circuit connection,
Circuit breaker operation mechanism movement, main transformer low-pressure side circuit breaker trip.
As it can be seen that by the above process, main transformer body grave gas protection circuit provided in an embodiment of the present invention may be implemented to become
When catastrophe failure occurring inside depressor, circuit breaker trip, disconnecting transformer power supply.And Buchholz relay electric contact includes two strings
The electric contact of connection, two electric contacts are closed at ability triggering following trip operation, and stability and safety are higher, avoid the occurrence of
Nonaction.
Wherein, DC power supply can be 220V voltage, convenient for obtaining.
Optionally, the first tripping LP1 in flakes is in series in second branch, third branch road is in series with the second tripping in flakes
LP2, the 4th road are in series with third tripping LP3 in flakes.When main transformer body grave gas protects circuit normal operation, the first tripping
LP3 is in closed communicating state in flakes for LP2 and third tripping in flakes for LP1, the second tripping in flakes.It puts into operation in new main transformer, modify greatly
When making power transmission when putting into operation, protective plug-in unit replacement, refueling, by the first tripping piece in flakes, the second tripping LP2 and third in flakes
LP3 is opened in flakes for tripping, and main transformer body grave gas protection circuit enters off working state, improves security performance, and be avoided that not
The generation of necessary tripping fault.
In the embodiment of the present invention, Buchholz relay electric contact is QYJ1-80 type Buchholz relay or QJ-80 type gas relay
The electric contact of device.The Buchholz relay of two kinds of models is double jump lock, dual signal Buchholz relay, can satisfy use demand.
The connection relationship of Buchholz relay the first electric contact WSJ1 and the second electric contact of Buchholz relay WSJ2 may refer to attached drawing 1.
Second aspect, the embodiment of the invention provides a kind of main transformer body grave gas guard methods, this method comprises:
When oil tank of transformer internal fault to predeterminable level, Buchholz relay electric contact closure, grave gas relay coil J
It obtains electric.
Grave gas relay coil J obtain it is electric after, grave gas relay normally open contact J1 closure, circuit breaker trip export relay
Device coil TJ obtains electric.
Circuit breaker trip exit relay coil TJ obtain it is electric after, the first circuit breaker trip exit relay normal opened contact TJ1
Closure, the first circuit breaker trip guard relay coil TBJ1 and the first breaking coil TQ1 obtain electric, trip(ping) circuit connection, open circuit
The movement of device operating mechanism, main transformer high-pressure side circuit breaker trip.
Circuit breaker trip exit relay coil TJ obtain it is electric after, the second circuit breaker trip exit relay normal opened contact TJ2
Closure, the second circuit breaker trip guard relay coil TBJ2 and the second breaking coil TQ2 obtain electric, trip(ping) circuit connection, open circuit
The movement of device operating mechanism, main transformer low-pressure side circuit breaker trip.
By the above process, main transformer body grave gas guard method provided in an embodiment of the present invention may be implemented in transformer
When catastrophe failure occurs for portion, circuit breaker trip, disconnecting transformer power supply.And Buchholz relay electric contact includes two concatenated electricity
Contact, two electric contacts are closed at ability triggering following trip operation, and stability and safety are higher, and it is existing to avoid the occurrence of malfunction
As.
Further, this method further include: when main transformer body grave gas protects circuit normal operation, the first tripping is in flakes
LP3 is in closed communicating state in flakes for LP2 and third tripping in flakes for LP1, the second tripping.New main transformer puts into operation, overhauling reform is sent
When electricity puts into operation, protective plug-in unit replacement, refuel when, by the first tripping piece in flakes, LP2 and third trip in flakes for the second tripping
LP3 is opened in flakes, and main transformer body grave gas protection circuit enters off working state, improves security performance, but be avoided that it is unnecessary
The generation of tripping fault.
It should be noted that, in this document, the relational terms of such as " first " and " second " or the like are used merely to one
A entity or operation with another entity or operate distinguish, without necessarily requiring or implying these entities or operation it
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or setting
Standby intrinsic element.In addition, placement shape of "front", "rear", "left", "right", "upper", the "lower" herein to be indicated in attached drawing
State is reference.
Finally, it should be noted that the above examples are only used to illustrate the technical scheme of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (7)
1. a kind of main transformer body grave gas protects circuit characterized by comprising DC power supply, Buchholz relay electric contact, micro-
Machine protection supervisory equipment, the first breaker auxiliary normal opened contact, the second breaker auxiliary normal opened contact, the first breaking coil and the
Two breaking coils；
The Buchholz relay electric contact includes concatenated two electric contacts；
The microcomputer protecting controller includes grave gas relay coil, grave gas relay normally open contact, circuit breaker trip
Exit relay coil, the first circuit breaker trip exit relay normal opened contact, the second circuit breaker trip exit relay are normally opened
Contact, the first circuit breaker trip guard relay coil and the second circuit breaker trip guard relay coil, the grave gas after
When electric apparatus coil obtains electric, the grave gas relay normally open contact closure, the circuit breaker trip exit relay coil obtains electric
When, the first circuit breaker trip exit relay normal opened contact and the second circuit breaker trip exit relay normal opened contact
Closure；
The Buchholz relay electric contact and grave gas relay coil series connection are used as the first branch, the grave gas relay
Device normal opened contact and circuit breaker trip exit relay coil series connection are used as second branch, and first circuit breaker trip goes out
Mouth relay normally open contact, the first circuit breaker trip guard relay coil, first breaker assist normal opened contact
It is used as third branch with first breaking coil series connection, it is the second circuit breaker trip exit relay normal opened contact, described
Second circuit breaker trip guard relay coil, second breaker auxiliary normal opened contact and second breaking coil series connection
As the 4th branch, the first branch, the second branch, the third branch and the 4th branch and the direct current
Source is in parallel.
2. main transformer body grave gas according to claim 1 protects circuit, which is characterized in that connect in the second branch
There is the first tripping in flakes.
3. main transformer body grave gas according to claim 1 protects circuit, which is characterized in that connect the third branch road
There is the second tripping in flakes.
4. main transformer body grave gas according to claim 1 protects circuit, which is characterized in that connect the 4th road
There is third tripping in flakes.
5. main transformer body grave gas according to claim 1 protects circuit, which is characterized in that the Buchholz relay electricity connects
Point is the electric contact of QYJ1-80 type Buchholz relay or QJ-80 type Buchholz relay.
6. a kind of main transformer body grave gas guard method, which is characterized in that the described method includes:
When oil tank of transformer internal fault to predeterminable level, Buchholz relay electric contact closure, the grave gas relay coil
It obtains electric；
The grave gas relay coil obtain it is electric after, grave gas relay normally open contact closure, the circuit breaker trip goes out
Mouth relay coil obtains electric；
The circuit breaker trip exit relay coil obtain it is electric after, the first circuit breaker trip exit relay normal opened contact closes
It closes, the first circuit breaker trip guard relay coil and first breaking coil obtain electric, trip(ping) circuit connection, breaker
Operating mechanism movement, main transformer high-pressure side circuit breaker trip；
The circuit breaker trip exit relay coil obtain it is electric after, the second circuit breaker trip exit relay normal opened contact closes
It closes, the second circuit breaker trip guard relay coil and second breaking coil obtain electric, trip(ping) circuit connection, breaker
Operating mechanism movement, main transformer low-pressure side circuit breaker trip.
7. main transformer body grave gas guard method according to claim 6, which is characterized in that the main transformer body grave gas
When protecting circuit normal operation, first tripping is in flakes, second tripping is in flakes with third tripping in flakes in closing
Close connected state；When new main transformer puts into operation, overhauling reform power transmission puts into operation, when protective plug-in unit replacement, oiling, described first
Tripping piece in flakes, it is described second tripping in flakes with the third tripping open in flakes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910137529.0A CN109830938B (en) | 2019-02-25 | 2019-02-25 | Main transformer body heavy gas protection circuit and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910137529.0A CN109830938B (en) | 2019-02-25 | 2019-02-25 | Main transformer body heavy gas protection circuit and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109830938A true CN109830938A (en) | 2019-05-31 |
| CN109830938B CN109830938B (en) | 2024-04-02 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910137529.0A Active CN109830938B (en) | 2019-02-25 | 2019-02-25 | Main transformer body heavy gas protection circuit and method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB393577A (en) * | 1930-11-26 | 1933-05-26 | British Thomson Houston Co Ltd | Improvements in and relating to protective apparatus for electric systems |
| CN203312765U (en) * | 2013-05-16 | 2013-11-27 | 安徽电力铜陵县供电有限责任公司 | An apparatus used for eliminating influence of an induction voltage on transformer microcomputer protection |
| CN206023179U (en) * | 2016-08-30 | 2017-03-15 | 陕西北元化工集团有限公司 | A kind of Transformer Heavy Gas protect electric loop |
| CN107046272A (en) * | 2017-06-15 | 2017-08-15 | 国网山西省电力公司电力科学研究院 | Breaker emergency trip control circuit and control method after dc source all disappears |
| CN209358237U (en) * | 2019-02-25 | 2019-09-06 | 山东钢铁股份有限公司 | Main transformer body grave gas protects circuit |
-
2019
- 2019-02-25 CN CN201910137529.0A patent/CN109830938B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB393577A (en) * | 1930-11-26 | 1933-05-26 | British Thomson Houston Co Ltd | Improvements in and relating to protective apparatus for electric systems |
| CN203312765U (en) * | 2013-05-16 | 2013-11-27 | 安徽电力铜陵县供电有限责任公司 | An apparatus used for eliminating influence of an induction voltage on transformer microcomputer protection |
| CN206023179U (en) * | 2016-08-30 | 2017-03-15 | 陕西北元化工集团有限公司 | A kind of Transformer Heavy Gas protect electric loop |
| CN107046272A (en) * | 2017-06-15 | 2017-08-15 | 国网山西省电力公司电力科学研究院 | Breaker emergency trip control circuit and control method after dc source all disappears |
| CN209358237U (en) * | 2019-02-25 | 2019-09-06 | 山东钢铁股份有限公司 | Main transformer body grave gas protects circuit |
Non-Patent Citations (2)
| Title |
|---|
| 徐勇;: "浅谈仙女堡电厂主变压器非电量保护问题", 中国高新技术企业, no. 13, pages 148 - 150 * |
| 蒋祖立;刘露露;: "主变重瓦斯跳闸接点并联改串联改造方法", 电工技术, no. 11, pages 137 - 138 * |
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| CN109830938B (en) | 2024-04-02 |
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