CN107807302A - A kind of transformer core fault handling method - Google Patents
A kind of transformer core fault handling method Download PDFInfo
- Publication number
- CN107807302A CN107807302A CN201710841545.9A CN201710841545A CN107807302A CN 107807302 A CN107807302 A CN 107807302A CN 201710841545 A CN201710841545 A CN 201710841545A CN 107807302 A CN107807302 A CN 107807302A
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- CN
- China
- Prior art keywords
- unshakable
- determination
- folder
- transformer core
- handling method
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- 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
- G01R31/62—Testing of transformers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention relates to electric power system fault processing technology field, more particularly, to a kind of transformer core fault handling method.Specific steps include short-circuit detecting, carry out circuit connection, carry out electric capacity charging, carry out discharge impact, secondary detection.Charged by using megameter to capacitor, then allow the capacitor for being stored with electric energy to be discharged by short circuit point of the short circuit between unshakable in one's determination and folder, short circuit point is melted so as to produce a large amount of heat energy, reaches the effect for removing failure.The present invention is handled failure using simple equipment, and the used time is shorter, troubleshooting efficiency high, smaller to effect on power system, there is higher actual application value.
Description
Technical field
The present invention relates to electric power system fault processing technology field, at a kind of transformer core failure
Reason method.
Background technology
The transformer of power system is Frequent Accidents equipment, is greatly by iron in numerous Accident of Transformer
Caused by heart failure, when multipoint earthing or the generation short circuit unshakable in one's determination with folder occur for unshakable in one's determination or folder, between earth point or short circuit point
Closed-loop path will be formed, and even part flux of magnetic induction electromotive force, and form circulation, there are local pyrexia phenomenon, serious conditions
Under to damage Transformer Winding insulation, scaling loss unshakable in one's determination.In the prior art, to the processing mode of failure unshakable in one's determination for hang cover inspection and
Processing, hanging cover needs to consume substantial amounts of human and material resources, and time-consuming and cost is higher, and system needs longer period of time out of service.
The content of the invention
The present invention is to overcome at least one defect described in above-mentioned prior art, there is provided a kind of quick processing transformer core
The method of failure, it can fast and effeciently exclude the failure of generation short circuit between unshakable in one's determination and folder, Quick-return system operation.
In order to solve the above technical problems, present invention employs following technical scheme：
There is metallic short circuit for the iron core of transformer with folder in a kind of transformer core fault handling method, the failure unshakable in one's determination,
Comprise the following steps：
S1：Short-circuit detecting：The detection resistance unshakable in one's determination between folder, when resistance value is too small, it is judged as unshakable in one's determination and folder metal
Property short circuit, perform step S2；
S2：Carry out circuit connection：By first switch in unshakable in one's determination and folder both sides parallel connection a capacitor, then opened by second
Close first switch and second switch in a megameter in the parallel connection of capacitor both sides, connection and be in off-state, complete
Step S3 is performed after circuit connection；
S3：Carry out electric capacity charging：Second switch is closed, is charged with megameter to capacitor, while checks the resistance value of megameter,
After the resistance value stabilization of megameter, second switch is disconnected, performs step S4；
S4：Carry out discharge impact：First switch is closed, allows the capacitor for being stored with electric energy to pass through the short circuit between unshakable in one's determination and folder
Point electric discharge, moment produce high current and given off heat, and melt short circuit point, and electric discharge performs step S5 after terminating；
S5：Secondary detection：The resistance between unshakable in one's determination and folder is measured with megameter again, if the resistance measured is sufficiently large, is sentenced
Disconnected failure vanishes, if resistance or too small, step S2 is performed again.
Further, the failure resistance between folder unshakable in one's determination still mistake after step S2 performs 3 times to step S5
It is small, then stop performing.
Further, after step S5 has performed failure judgement disappearance, when transformer puts into operation, can be run again
Detection, unshakable in one's determination and folder earth current is detected respectively, electric current is sufficiently small, illustrates transformer normal operation.
To ensure troubleshooting quality, megameter output voltage chooses 2500-5000V, and the capacity of the capacitor of selection is
20-50μF。
For protection equipment and the safety of staff, operating personnel need to take insulation measures upon execution, and are performing
Capacitor is tackled before step S5 and transformer core is substantially discharged.
Compared with prior art, beneficial effect is：Failure is handled using simple equipment, the used time is shorter, failure
Treatment effeciency is high, smaller to effect on power system.
Brief description of the drawings
Fig. 1 is the fault logic circuits wiring diagram of the present invention.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings：
There is metallic short circuit for the iron core of transformer with folder in a kind of transformer core fault handling method, the failure unshakable in one's determination,
Comprise the following steps：
S1：Short-circuit detecting：The detection resistance unshakable in one's determination between folder, when resistance value is too small, it is judged as unshakable in one's determination and folder metal
Property short circuit, perform step S2；
S2：Carry out circuit connection：As described in Figure 1,3 be at unshakable in one's determination and folder short circuit, by first switch K1 in unshakable in one's determination and folder
Part both sides upper capacitor C in parallel, 1 is lead-out wire unshakable in one's determination, and 2 be folder lead-out wire, then by second switch K2 in capacitor C
A both sides upper megameter in parallel, first switch K1 and second switch K2 is in off-state during connection, completes circuit connection
Step S3 is performed afterwards；
S3：Carry out electric capacity charging：Second switch K2 is closed, is charged with megameter to capacitor C, while check the resistance of megameter
Value, after the resistance value stabilization of megameter, second switch K2 is disconnected, performs step S4；
S4：Carry out discharge impact：First switch K1 is closed, allows the capacitor C for being stored with electric energy to pass through between unshakable in one's determination and folder
Short circuit point discharges, and moment produces high current and given off heat, and melts short circuit point, and electric discharge performs step S5 after terminating；
S5：Secondary detection：The resistance between unshakable in one's determination and folder is measured with megameter again, if the resistance measured is sufficiently large, is sentenced
Disconnected failure vanishes, step S6 is performed, if resistance or too small, perform step S2 again；
S6：When transformer puts into operation, operation detection can be carried out again, respectively the detection earth current unshakable in one's determination with folder, electric current
It is sufficiently small, illustrate transformer normal operation.
Further, the failure resistance between folder unshakable in one's determination still mistake after step S2 performs 3 times to step S5
It is small, then stop performing.
To ensure troubleshooting quality, megameter output voltage chooses 2500-5000V, and the capacitor C of selection capacity is
20-50μF。
For protection equipment and the safety of staff, operating personnel need to take insulation measures upon execution, and are performing
Capacitor is tackled before step S5 and transformer core is substantially discharged.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not pair
The restriction of embodiments of the present invention.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms.There is no necessity and possibility to exhaust all the enbodiments.It is all this
All any modification, equivalent and improvement made within the spirit and principle of invention etc., should be included in the claims in the present invention
Protection domain within.
Claims (7)
1. a kind of transformer core fault handling method, it is short that the failure unshakable in one's determination for the iron core of transformer with folder metallicity occurs
Road, it is characterised in that：Comprise the following steps：
S1：Short-circuit detecting：The detection resistance unshakable in one's determination between folder, when resistance value is too small, it is judged as unshakable in one's determination and folder metal
Property short circuit, perform step S2；
S2：Carry out circuit connection：By first switch in unshakable in one's determination and folder both sides parallel connection a capacitor, then opened by second
Close first switch and second switch in a megameter in the parallel connection of capacitor both sides, connection and be in off-state, complete
Step S3 is performed after circuit connection；
S3：Carry out electric capacity charging：Second switch is closed, is charged with megameter to capacitor, while checks the resistance value of megameter,
After the resistance value stabilization of megameter, second switch is disconnected, performs step S4；
S4：Carry out discharge impact：First switch is closed, allows the capacitor for being stored with electric energy to pass through the short circuit between unshakable in one's determination and folder
Point electric discharge, moment produce high current and given off heat, and melt short circuit point, and electric discharge performs step S5 after terminating；
S5：Secondary detection：The resistance between unshakable in one's determination and folder is measured with megameter again, if the resistance measured is sufficiently large, is sentenced
Disconnected failure vanishes, if resistance or too small, step S2 is performed again.
A kind of 2. transformer core fault handling method according to claim 1, it is characterised in that：As step S2 to step
The failure resistance unshakable in one's determination between folder is still too small after S5 is performed 3 times, then stops performing.
A kind of 3. transformer core fault handling method according to claim 1 or 2, it is characterised in that：Held in step S5
After failure judgement of having gone disappears, when transformer puts into operation, operation detection can be carried out again, detect unshakable in one's determination and folder connect respectively
Earth-current, electric current is sufficiently small, illustrates transformer normal operation.
A kind of 4. transformer core fault handling method according to claim 1 or 2, it is characterised in that：Described megaohm
Table output voltage chooses 2500-5000V.
A kind of 5. transformer core fault handling method according to claim 1 or 2, it is characterised in that：Described electric capacity
The capacity of device is 20-50 μ F.
A kind of 6. transformer core fault handling method according to claim 1 or 2, it is characterised in that：Performing step
Capacitor is tackled before S5 and transformer core is substantially discharged.
A kind of 7. transformer core fault handling method according to claim 1 or 2, it is characterised in that：Operating personnel exist
Insulation measures need to be taken during execution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710841545.9A CN107807302A (en) | 2017-09-18 | 2017-09-18 | A kind of transformer core fault handling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710841545.9A CN107807302A (en) | 2017-09-18 | 2017-09-18 | A kind of transformer core fault handling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107807302A true CN107807302A (en) | 2018-03-16 |
Family
ID=61592431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710841545.9A Pending CN107807302A (en) | 2017-09-18 | 2017-09-18 | A kind of transformer core fault handling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107807302A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108732450A (en) * | 2018-04-02 | 2018-11-02 | 西南交通大学 | Short-circuit detecting system and method between high-power transformer rewinding material piece |
| CN108896624A (en) * | 2018-04-02 | 2018-11-27 | 西南交通大学 | A kind of detection method of transformer large size rewinding material winding effect |
-
2017
- 2017-09-18 CN CN201710841545.9A patent/CN107807302A/en active Pending
Non-Patent Citations (3)
| Title |
|---|
| 《刘玉秀》: "《浅谈电容放电法在消除变压器铁心》", 《内江科技》 * |
| 王秋荣: "《对变压器铁芯多点接地故障的分析及处理》", 《2014年全国科技工作会议论文集》 * |
| 黄勇 等: "《变压器铁芯多点接地故障分析及处理》", 《江西电力》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108732450A (en) * | 2018-04-02 | 2018-11-02 | 西南交通大学 | Short-circuit detecting system and method between high-power transformer rewinding material piece |
| CN108896624A (en) * | 2018-04-02 | 2018-11-27 | 西南交通大学 | A kind of detection method of transformer large size rewinding material winding effect |
| CN108896624B (en) * | 2018-04-02 | 2019-05-03 | 西南交通大学 | A kind of detection method of transformer large size rewinding material winding effect |
| CN108732450B (en) * | 2018-04-02 | 2019-06-04 | 西南交通大学 | Short-circuit detection method between high-power transformer rewinding material piece |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180316 |