CN105911413A - Elimination method for hidden dangers in transformer line fault - Google Patents
Elimination method for hidden dangers in transformer line fault Download PDFInfo
- Publication number
- CN105911413A CN105911413A CN201610271624.6A CN201610271624A CN105911413A CN 105911413 A CN105911413 A CN 105911413A CN 201610271624 A CN201610271624 A CN 201610271624A CN 105911413 A CN105911413 A CN 105911413A
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- current
- transformator
- transformer
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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
-
- 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
Abstract
The invention discloses an elimination method for hidden dangers in transformer line fault. The method comprises the following steps of firstly acquiring the current at the input terminal and the output terminal of a transformer in real time; secondly, if the current at the input terminal is smaller than a fault determination initiating current, and the current at the output terminal is greater or equal to the fault determination initiating current at any time in a set period, then retrieving recorded sound information acquired inside the transformer in the set period; If the recorded sound information includes cracking or buzzing during the time period when the current at the output terminal is greater or equal to the fault determination initiating current, it indicates that there exists a fault of short circuits among the lines in the transformer system. If the current at the input terminal is smaller than the fault determination initiating current and the current at the output terminal stays to be zero at any time in a set period, it indicates that there exists a fault of break circuits among the lines in the transformer system. The third step of the method is updating the check results of the lines of the transformer system and the geological position of the transformer to the control center of the power grid.
Description
Technical field
The present invention relates to transformer fault investigation technology, be specifically related to transformer lines potential faults method for removing.
Background technology
Transformator (Transformer) be the principle utilizing electromagnetic induction to change the device of alternating voltage, main member is primary coil, secondary coil and iron core (magnetic core).Major function has: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilizing (magnetic saturation transformator) etc., it is widely used in power system, throughout various places, town and country, it plays vital effect in electrical network, once transformator breaks down, its section, place and electrical network downstream are all by paralyzed state, therefore transformator is when being operated, need the moment that its circuit state is checked, when breaking down, need to find out its place broken down and reason thereof rapidly, and currently for transformator, the most substantially there is no a kind of method its fault effectively can investigated and find out failure cause.
Summary of the invention
For above-mentioned deficiency of the prior art, to inside transformer circuit, whether the transformer lines potential faults method for removing that the present invention provides can occur that short trouble or open circuit fault are investigated rapidly.
In order to reach foregoing invention purpose, the technical solution used in the present invention is:
Thering is provided a kind of transformer lines potential faults method for removing, it comprises the following steps:
Moment gathers input electric current and the output end current of transformator；
Judge whether input electric current and the output end current of transformator are equal to its breakdown judge starting current in setting the time period；
If input electric current is less than its breakdown judge starting current, and output end current any instant in setting the time period rises persistently more than or equal to its breakdown judge starting current；
The recorded message produced in reading the transformator gathered in setting the time period；
If recorded message exists crack or roar within output end current is persistently more than or equal to the time period of its breakdown judge starting current, then there is short trouble in the circuit in voltage transformer system；
If input electric current is less than its breakdown judge starting current, and output end current any instant in setting the time period rises and is continuously zero, then the circuit in voltage transformer system exists open circuit fault；
If input electric current and output end current are respectively less than its breakdown judge starting current, then voltage transformer wireless road fault；
Upload the geographic location of the circuit investigation result in voltage transformer system and transformator to grid control centre.
The invention have the benefit that this programme passes through input electric current and the output end current of moment collection transformator, if input electric current is normal, output end current is zero, then open circuit fault occurs in voltage transformer system circuit；If input electric current is normal, output end current occurs abnormal, in conjunction with the recorded message gathered, whether inside transformer circuit being occurred, short circuit carries out judging investigation, the most again investigation information is sent to grid control centre.
Adopt and can rapidly transformer lines fault be got rid of in such a way, and learn that the fault of which aspect occurs in its circuit, so staff of control centre can contact relevant maintainer rapidly and keeps in repair, it is to avoid impact to the resident living of section, failure transformer place and electrical network periphery downstream.
Accompanying drawing explanation
Fig. 1 is the flow chart of transformer lines one embodiment of potential faults method for removing.
Fig. 2 is the operational flowchart that one embodiment of method for removing of open circuit fault occurs in concrete certain section of circuit of transformator.
Detailed description of the invention
Below the detailed description of the invention of the present invention is described; so that those skilled in the art understand the present invention; it is to be understood that; the invention is not restricted to the scope of detailed description of the invention; from the point of view of those skilled in the art; as long as various changes limit and in the spirit and scope of the present invention that determine, these changes are apparent from, and all utilize the innovation and creation of present inventive concept all at the row of protection in appended claim.
The flow chart of transformer lines one embodiment 100 of potential faults method for removing is shown with reference to Fig. 1, Fig. 1；As it is shown in figure 1, the method comprises the following steps:
In a step 101, the moment gathers input electric current and the output end current of transformator.When the circuit of inside transformer breaks down, its input electric current is typically at normally, and often the output end current of transformator there will be exception, therefore mainly gets rid of from the two electric current line fault to transformator of starting with in this programme.
In a step 102, it is judged that whether the input electric current of transformator and output end current are equal to its breakdown judge starting current in setting the time period；Being both provided with a breakdown judge starting current corresponding with its line current in this programme in needing the circuit at collection electric current, often on place's circuit, corresponding breakdown judge starting current is all different.
Being in particular, the breakdown judge starting current mentioned in this programme is set greater than the rated current of 1.1 times of its corresponding electric currents.Transformator is operationally, if access electrical equipment thereon more time, arise that the phenomenon of overload, at this moment its power and operating current all can occur the fluctuation of little scope under rated condition, relation between breakdown judge starting current and the rated current of corresponding electric current of this programme, also it is mainly voltage device and consideration when transshipping occurs, after so arranging, just do not have the situation of transformer lines fault erroneous judgement.
In step 103, if input electric current is less than its breakdown judge starting current, and output end current any instant in setting the time period rises persistently more than or equal to its breakdown judge starting current；After once breaking down due to the circuit of transformator, this fault is irreversible, and its electric current can be constantly in abnormality, if occurring momently more than breakdown judge starting current, this being probably causes when there is traffic overload, and this programme do not considers this situation.
At step 104, the recorded message produced in reading the transformator gathered in setting the time period；When traffic overload or the biggest short circuit current occurs in transformator, its internal circuit can send the biggest sound, therefore the sound that can be produced by transformer circuit in this programme is as a standard of breakdown judge.
In step 105, if recorded message exists crack or roar within output end current is persistently more than or equal to the time period of its breakdown judge starting current, then there is short trouble in the circuit in voltage transformer system.
In one embodiment of the invention, when there is short trouble in the circuit in voltage transformer system, this programme typically use following methods to determine fault specifically occurs in transformator on which section circuit, to facilitate maintainer to make maintenance program rapidly.
Method for removing short trouble occur at certain section of circuit concrete to transformator is:
Read the wire current on the input current of coil input end of transformator, the output electric current of coil output and lead-in wire；
If input current, output electric current and wire current any value any instant in setting the time period rises persistently more than or equal to its breakdown judge starting current, then there is short trouble at phase induced current correspondence section circuit in transformator.
In step 106, if input electric current is less than its breakdown judge starting current, and output end current any instant in setting the time period rises and is continuously zero, then the circuit in voltage transformer system exists open circuit fault.
In step 107, if input electric current and output end current are respectively less than its breakdown judge starting current, then voltage transformer wireless road fault.
In step 108, the geographic location of the circuit investigation result in voltage transformer system and transformator is uploaded to grid control centre.
In one embodiment of the invention, when using this method that transformator is carried out line fault removing the hidden trouble, firstly the need of each install at transformator time, it is provided with detection cable between the input and the coil input end of transformator of transformator and between the input of transformator and the outfan of transformator, and between transformator outfan and External cable and on all detection cables, is provided with control switch.
Detection cable and control the setting of switch, can so that transformer lines breaks down time, use it to confirm accurately concrete certain section of circuit is the most faulty.
When there is open circuit fault in the circuit in voltage transformer system, this programme typically use following methods to determine fault specifically occurs in transformator on which section circuit, to facilitate maintainer to make maintenance program rapidly.
Show that the operational flowchart of one embodiment 200 of method for removing of open circuit fault occurs in concrete certain section of circuit of transformator with reference to Fig. 2, Fig. 2.As in figure 2 it is shown, the method comprises the following steps:
In step 201, the wire current on the input current of coil input end of transformator, the output electric current of coil output and lead-in wire is read.
In step 202., if input current is zero, then the circuit between input and the transformer coil input of transformator is in off state, enters step 203；Now also need to the fault of transformator All other routes is got rid of, finally to determine whether line broken circuit occurs only on the circuit between the input of transformator and transformer coil input.
If input current is in normal condition, then continues to judge to export electric current and whether wire current is equal to zero, if output electric current is zero, then enter in step 205, otherwise enter step 208.
In step 203, the detection cable between conducting transformer inputs and transformer coil input；Owing to open circuit occurs in the circuit between input and the transformer coil input of transformator, the electric current of input is difficult to the circuit arriving at transformer coil normally and transformator is follow-up, after so arranging, can make at transformer coil and circuit that transformator is follow-up has electric current supply.
In step 204, the output electric current of read coil outfan and the wire current on lead-in wire.
In step 205, if output electric current is zero, then the coil of transformator breaks down；If output electric current is in normal operating conditions, and judges wire current, enter step 208.
In step 206, the detection cable between conducting transformer inputs and transformer coil outfan, and the control switch between disconnecting transformer outfan and External cable；The effect of this step conduction detection cable is consistent with the effect mentioned in step 203, is not repeating.After the purpose of disconnecting transformer outfan and External cable is to ensure that transformer coil fault, it is to avoid alternating current is exported by transformator, causes other equipment of its supply path rear end, place to be broken down by rush of current.
In step 207, the wire current on lead-in wire is read.
In a step 208, if wire current is zero, then there is open circuit fault in lead-in wire；Otherwise, between lead-in wire and transformator outfan, cable breaks down.
In sum, transformer lines fault can be got rid of by method rapidly that use this programme to provide, and learn that the fault of which aspect occurs in its circuit, so staff of control centre can contact relevant maintainer rapidly and keeps in repair, it is to avoid impact to the resident living of section, failure transformer place and electrical network periphery downstream.
Claims (5)
1. transformer lines potential faults method for removing, it is characterised in that comprise the following steps:
Moment gathers input electric current and the output end current of transformator；
Judge whether input electric current and the output end current of transformator are equal to its breakdown judge starting current in setting the time period；
If input electric current is less than its breakdown judge starting current, and output end current any instant in setting the time period rises persistently more than or equal to its breakdown judge starting current；
The recorded message produced in reading the transformator gathered in setting the time period；
If recorded message exists crack or roar within output end current is persistently more than or equal to the time period of its breakdown judge starting current, then there is short trouble in the circuit in voltage transformer system；
If input electric current is less than its breakdown judge starting current, and output end current any instant in setting the time period rises and is continuously zero, then the circuit in voltage transformer system exists open circuit fault；
If input electric current and output end current are respectively less than its breakdown judge starting current, then voltage transformer wireless road fault；
Upload the geographic location of the circuit investigation result in voltage transformer system and transformator to grid control centre.
Transformer lines potential faults method for removing the most according to claim 1, it is characterized in that, when transformator is installed, it is provided with detection cable between the input and the coil input end of transformator of transformator and between the input of transformator and the outfan of transformator, and between transformator outfan and External cable and on all detection cables, is provided with control switch.
Transformer lines potential faults method for removing the most according to claim 2, it is characterised in that when the circuit in voltage transformer system exists short trouble:
Read the wire current on the input current of coil input end of transformator, the output electric current of coil output and lead-in wire；
If input current, output electric current and wire current any value any instant in setting the time period rises persistently more than or equal to its breakdown judge starting current, then there is short trouble at phase induced current correspondence section circuit in transformator.
4. according to the transformer lines potential faults method for removing described in Claims 2 or 3, it is characterised in that when the circuit in voltage transformer system exists open circuit fault:
Read the wire current on the input current of coil input end of transformator, the output electric current of coil output and lead-in wire；
If input current is zero, then the circuit between input and the transformer coil input of transformator is in off state；
Detection cable between conducting transformer inputs and transformer coil input；
Wire current on the output electric current of read coil outfan and lead-in wire；
If output electric current is zero, then the coil of transformator breaks down；
Detection cable between conducting transformer inputs and transformer coil outfan, and the control switch between disconnecting transformer outfan and External cable；
Read the wire current on lead-in wire；
If wire current is zero, then there is open circuit fault in lead-in wire；Otherwise, between lead-in wire and transformator outfan, there is open circuit fault in cable.
5. according to the transformer lines potential faults method for removing described in Claims 2 or 3, it is characterised in that described breakdown judge starting current is more than the rated current of 1.1 times of its corresponding electric currents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610271624.6A CN105911413B (en) | 2016-04-28 | 2016-04-28 | Transformer lines potential faults method for removing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610271624.6A CN105911413B (en) | 2016-04-28 | 2016-04-28 | Transformer lines potential faults method for removing |
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| CN105911413A true CN105911413A (en) | 2016-08-31 |
| CN105911413B CN105911413B (en) | 2018-10-19 |
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| CN201610271624.6A Expired - Fee Related CN105911413B (en) | 2016-04-28 | 2016-04-28 | Transformer lines potential faults method for removing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111060849A (en) * | 2019-12-13 | 2020-04-24 | 西安锐驰电器有限公司 | Power fault detection method for transformer |
| CN112952745A (en) * | 2021-04-16 | 2021-06-11 | 阳光电源股份有限公司 | Photovoltaic system, short-circuit protection method and device thereof, and inverter |
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| CN102735969A (en) * | 2012-06-13 | 2012-10-17 | 江苏省电力公司南京供电公司 | Power transformer winding fault simulation test method |
| CN103323736A (en) * | 2013-07-04 | 2013-09-25 | 艾柯电器（苏州）有限公司 | Half short circuit point detection device for transformer |
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| CN102735969A (en) * | 2012-06-13 | 2012-10-17 | 江苏省电力公司南京供电公司 | Power transformer winding fault simulation test method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111060849A (en) * | 2019-12-13 | 2020-04-24 | 西安锐驰电器有限公司 | Power fault detection method for transformer |
| CN112952745A (en) * | 2021-04-16 | 2021-06-11 | 阳光电源股份有限公司 | Photovoltaic system, short-circuit protection method and device thereof, and inverter |
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| Publication number | Publication date |
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| CN105911413B (en) | 2018-10-19 |
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Granted publication date: 20181019 Termination date: 20200428 |