CN203673001U - Device for on-line monitoring dry-type reactors by measuring leakage magnetic field - Google Patents
Device for on-line monitoring dry-type reactors by measuring leakage magnetic field Download PDFInfo
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- CN203673001U CN203673001U CN201320660892.9U CN201320660892U CN203673001U CN 203673001 U CN203673001 U CN 203673001U CN 201320660892 U CN201320660892 U CN 201320660892U CN 203673001 U CN203673001 U CN 203673001U
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- gaussmeter
- dry
- current signal
- dry reactor
- stray field
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Abstract
The utility model discloses a device for on-line monitoring dry-type reactors by measuring a leakage magnetic field. The device comprises a Gauss meter and a column mounted at the symcenter (from the top view) of three dry-type reactors which are in a delta-shaped arrangement. A sensor of the Gauss meter is mounted on the top of the column, and used for acquiring the leakage magnetic field of the dry-type reactors in real time. The Gauss meter is mounted on the column, and connected to a computer in a control room by a signal line. The computer is used for receiving a current signal converted by the Gauss meter, and comparing the received current signal with a threshold stored in the computer for analysis. If the value of the current signal is larger than the value of the preset threshold, a warning is given. A power line of the Gauss meter is led out from the control room. According to the utility model, the Gauss meter is mounted in the plumb line of the centroid of an equilateral triangle formed by the dry-type reactors, and the vector of the leakage magnetic field at any point in the plumb line is equal to the zero vector, such that the on-line monitoring for the dry-type reactors is carried out by measuring the size of the magnetic induction intensity vector of the leakage magnetic field, thereby preventing accidents.
Description
Technical field
The utility model belongs to the monitoring equipment technical field of dry reactor, relates in particular to a kind of stray field measurement type dry reactor on-Line Monitor Device.
Background technology
Up to the present, all there is the serious burnout failure of the dry reactor such as dry-type air-core reactor or dry half-core reactor in many transformer stations, current conversion station, wherein be no lack of UHV (ultra-high voltage), ultra-high voltage transformer station and ultra-high voltage converter station, these accidents have had a strong impact on power plant safety operation, have caused massive losses.
The reason that dry reactor burns is a lot, such as: dry reactor coil generally adopts drum type brake winding, each reactor winding is made up of multiple sealing, turn insulation between wire is very thin, burr, metal fragment or other foreign matter of conductive line surfaces is easy to turn insulation to prick and wear, cause turn-to-turn short circuit, form a short-circuited conducting sleeve.As long as have a some generation turn-to-turn short circuit in line bag, this reactor has just become an actual transformer, and, the no-load voltage ratio of this transformer is very big---and the on high-tension side number of turn approximates the number of turn of reactor, low-pressure side only has a circle and low-pressure side short circuit operation, electric current by the known low-pressure side of principle of ampere-turn equilibrium is very big, the huge heating power that so large short-circuit current produces in short-circuited conducting sleeve can burn reactor at short notice, so every all there is turn-to-turn short circuit in the initial stage of burnout failure together.
Magnetic field is pipe amount field, the magnetic field that electric current in dry reactor coil is responded to must form closed loop round the electric current that produces magnetic field, because the magnetic circuit of dry reactor is open, the magnetic field of the exchange current induction in coil will be by the region closed loop beyond dry reactor coil, and the magnetic field beyond dry reactor coil is called the stray field of dry reactor.
The size and Orientation of the magnetic flux density vector of the outer fixed field point of dry reactor coil is relevant with the current field in dry reactor coil, once current field changes, the magnetic flux density vector of that fixed field point can change simultaneously, and, the magnetic flux density vector of this fixed field point is followed vector superposed principle, and one group of three-phase dry type reactor generation magnetic field will superpose at this point.
Therefore, can find the shorted-turn fault of dry reactor inside by monitoring the changes of magnetic field of this point.
Utility model content
The problem that the utility model solves is to provide a kind of stray field measurement type dry reactor on-Line Monitor Device, has realized the on-line monitoring to dry reactor, can effectively avoid accident to occur, and guarantees substation safety, reliability service.
The utility model is to be achieved through the following technical solutions:
A kind of stray field measurement type dry reactor on-Line Monitor Device, comprise gaussmeter and be arranged on the column of three dry reactor symcenter that isosceles triangle is arranged, the sensor of gaussmeter is installed on described column top, and sensor is for the stray field of Real-time Collection dry reactor; Gaussmeter gauge outfit is installed on column, gaussmeter gauge outfit is connected on the computing machine of pulpit by signal wire, computing machine is for receiving the current signal after gaussmeter conversion, and the threshold values of storing in the current signal receiving and its internal fault warning system is analyzed, if the current value of current signal is greater than predefined threshold values, send warning message; The power lead of gaussmeter is accessed by pulpit.
Described device also comprises the mobile phone of the warning message sending for receiving computer.
Described sensor is Hall element.
Described computing machine, also for the current signal receiving is made a list automatically, curve plotting, to intuitively show fault progression trend.
Gaussmeter, changes into 4-20mA current signal for the magnetic field amount of stray field that sensor is collected, by signal wire by the current signal transfer after transforming to the computing machine of pulpit.
Compared with prior art, the utlity model has following useful technique effect:
A. be installed on the symcenter place of the dry reactor of isosceles triangle layout due to the gaussmeter of this utility model, and in the time that this organizes dry reactor in normal condition, because the structure of three-phase dry type reactor is in full accord, parameter consistent, the effective value of terminal voltage is consistent with frequency, but the initial phase angle difference of three phase terminals voltage, phase differential is respectively 120 °, therefore, the effective value of the electric current of three-phase is consistent with frequency, and phase differential is respectively 120 °.Because electric current is the source in magnetic field, through stray field (three-phase dry type reactor is responded to) magnetic flux density vector of any point on the pedal line of above-mentioned equilateral triangle center of gravity and the vector that must equal zero, certainly, the magnetic flux density vector of this point and the vertical component vector that also equals zero.At the sensor (Hall element) that gaussmeter is installed through a certain height and position horizontal direction on the pedal line of equilateral triangle center of gravity, can whether equal zero by the reading that judges gaussmeter, come fast and effectively dry reactor to be carried out to on-line monitoring.
B. this utility model, by observing the curve plotting on the computing machine of pulpit, can effectively be avoided dry reactor that serious burnout failure occurs, jeopardize power plant safety operation; When accident potential appears in dry reactor, for processing problem is raced against time, install after stray field measurement type dry reactor on-Line Monitor Device, once the reading of gaussmeter is not equal to zero, and exceed the threshold values of setting, operator on duty can receive alerting signal immediately, next, operator on duty is in paying close attention to this reactor, press again dependent failure processing files specify notice scheduling and leading body at a higher level, reactor manufacturer, each side consults, formulates fault handling scheme jointly, and the processing scheme of making in this case must be fairly perfect.
C. receiving after alerting signal, operator on duty can rush for rapidly reactor erecting stage close-ups fault reactor, they can provide very valuable information for next step trouble-shooting point, formulation fault reactor maintenance program to field condition description, record material, shorten servicing time, reduce collateral damage.
D. stray field measurement type dry reactor on-Line Monitor Device is Intelligent automatic equipment, there is real time data upload function, can round-the-clock, 24 continuous throughout the twenty-four hour24s, can automatic on-line monitoring dry reactor, greatly reduce staff's working strength and work difficulty.
Accompanying drawing explanation
The structural representation one of the stray field measurement type dry reactor on-Line Monitor Device that Fig. 1 provides for the utility model;
The structural representation two of the stray field measurement type dry reactor on-Line Monitor Device that Fig. 2 provides for the utility model.
Wherein, 1 is column; 2 is the sensor of gaussmeter; 3 is gaussmeter gauge outfit; 4 is signal wire; 5 is computing machine.
Embodiment
Below in conjunction with concrete example, the utility model is described in further detail, described in be to explanation of the present utility model rather than restriction.
Referring to Fig. 1, Fig. 2, a kind of stray field measurement type dry reactor on-Line Monitor Device, comprise gaussmeter and be arranged on the column 1 of three dry reactor symcenter (overlooking) that isosceles triangle is arranged, the sensor 2 of gaussmeter is installed on described column 1 top, and sensor 2 is for the magnetic flux density vector size of this point of Real-time Collection dry reactor stray field; Described sensor is Hall element; Gaussmeter gauge outfit 3 is installed on column 1, gaussmeter gauge outfit 3 is connected on pulpit computing machine 5 by signal wire 4, computing machine 5 is for receiving the current signal after gaussmeter conversion, and the threshold values of storing in the current signal receiving and its internal fault warning system is analyzed, if the current value of current signal is greater than predefined threshold values, send warning message; Described device also comprises the mobile phone of the warning message for sending by network receiving computer.Meanwhile, computing machine 5 also for the current signal receiving is made a list automatically, curve plotting, to intuitively show fault progression trend.The power lead Access Control chamber of gaussmeter.
Concrete, gaussmeter, the magnetic field amount of the stray field that sensor 2 is collected changes into 4-20mA current signal, by signal wire 4 by the current signal transfer after transforming to pulpit computing machine 5.
In addition, the magnetic flux density vector size of this point in the stray field of gaussmeter sensor 2 Real-time Collection dry reactors, the data that collect are presented at the gaussmeter gauge outfit 3 being installed on column 1.
This utility model is mainly used in one group of three-phase, paperback, isosceles triangle and arranges that reactor (overlooks one group of dry reactor, the center of circle of A, B, C three-phase coil lays respectively at three summits place of equilateral triangle) shorted-turn fault, in the time that this organizes dry reactor in normal condition, because the structure of three-phase dry type reactor is in full accord, parameter consistent, the effective value of terminal voltage is consistent with frequency, but the initial phase angle difference of three phase terminals voltage, phase differential is respectively 120 °, therefore, the effective value of the electric current of three-phase is consistent with frequency, and phase differential is 120 ° respectively.Because electric current is the source in magnetic field, through the vector of stray field (three-phase dry type reactor is responded to) magnetic induction density of any point on the pedal line of the above-mentioned equilateral triangle center of gravity vector that must equal zero, certainly the vertical component of the stray field vector vector that also equals zero.At the sensor (Hall element) that gaussmeter is installed through a certain height and position horizontal direction on the pedal line of equilateral triangle center of gravity, in the time that reactor is normal, the reading of gaussmeter equals zero.
If there is mutually turn-to-turn short circuit in a certain in three-phase dry type reactor, short-circuit current huge in short-circuited conducting sleeve is by the three-phase magnetic field balance of destroying under normal circumstances, the reading of gaussmeter is no longer equalled zero, because gaussmeter has signal wire to be connected with pulpit computing machine, when the reading of gaussmeter exceedes the threshold values of setting, control indoor location the computing machine of Analysis on Magnetic Leakage Field alarm software will send alerting signal, notify operator on duty to take measures.
Concrete, a root post is installed in the dry reactor symcenter position that a. arranges at one group of paperback, isosceles triangle according to the wiring diagram of this utility model, and Hall element is installed on column top, and gaussmeter gauge outfit is installed in the position that is equivalent to people's height on column.
B. the power lead of gaussmeter is accessed by pulpit, with signal wire connection gaussmeter gauge outfit and pulpit, the magnetic field amount monitoring is changed into 4-20mA current signal by gaussmeter, upload to pulpit computing machine 5 by signal wire, the threshold values of storing in analysis alarm software in the fault early warning system that pulpit computing machine 5 is installed by the current value in current signal and on it compares, and automatically make a list, curve plotting, can intuitively show fault progression trend, in the time that the numerical value of threshold values is greater than zero, send warning message, and by network, warning message is sent on the responsible official of the relevant departments mobile phone of binding with dry reactor on-Line Monitor Device fault early warning system.
The utility model is a kind of stray field by monitoring dry-type air-core reactor or dry half-core reactor is carried out on-line monitoring device to dry reactor, can be for dry reactor status monitoring, once find that dry reactor exists shorted-turn fault, can send fault pre-alarming in the very first time, accident is eliminated in bud, avoided larger loss.
Claims (5)
1. a stray field measurement type dry reactor on-Line Monitor Device, it is characterized in that, comprise gaussmeter and be arranged on the column (1) of three dry reactor symcenter that isosceles triangle is arranged, the sensor (2) of gaussmeter is installed on described column (1) top, and sensor (2) is for the stray field of Real-time Collection dry reactor; Gaussmeter gauge outfit (3) is installed on column (1), gaussmeter gauge outfit (3) is connected on pulpit computing machine (5) by signal wire (4), computing machine (5) is for receiving the current signal after gaussmeter conversion, and the threshold values of storing in the current signal receiving and its internal fault warning system is analyzed, if the current value of current signal is greater than predefined threshold values, send warning message; The power lead of gaussmeter is accessed by pulpit.
2. stray field measurement type dry reactor on-Line Monitor Device according to claim 1, is characterized in that, described device also comprises the mobile phone of the warning message sending for receiving computer.
3. stray field measurement type dry reactor on-Line Monitor Device according to claim 1, is characterized in that, described sensor is Hall element.
4. stray field measurement type dry reactor on-Line Monitor Device according to claim 1, is characterized in that, described computing machine (5), also for the current signal receiving is made a list automatically, curve plotting, to intuitively show fault progression trend.
5. stray field measurement type dry reactor on-Line Monitor Device according to claim 1, it is characterized in that, gaussmeter, the magnetic field amount that is used for the stray field that sensor (2) is collected changes into 4-20mA current signal, and by signal wire (4), the current signal transfer after transforming is arrived on pulpit computing machine (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320660892.9U CN203673001U (en) | 2013-10-24 | 2013-10-24 | Device for on-line monitoring dry-type reactors by measuring leakage magnetic field |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320660892.9U CN203673001U (en) | 2013-10-24 | 2013-10-24 | Device for on-line monitoring dry-type reactors by measuring leakage magnetic field |
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| CN203673001U true CN203673001U (en) | 2014-06-25 |
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| CN201320660892.9U Expired - Fee Related CN203673001U (en) | 2013-10-24 | 2013-10-24 | Device for on-line monitoring dry-type reactors by measuring leakage magnetic field |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675587A (en) * | 2013-10-24 | 2014-03-26 | 西安欣东源电气有限公司 | Magnetic leakage field measuring type dry-type reactor on-line monitoring device and method |
| CN107301271A (en) * | 2017-05-23 | 2017-10-27 | 哈尔滨工业大学深圳研究生院 | A kind of steel wire rope outer layer damages Magnetic Flux Leakage Inspecting Quantitative algorithm |
| WO2020258895A1 (en) * | 2019-06-28 | 2020-12-30 | 苏州大学 | Magnetic flux leakage detection probe with high sensitivity |
-
2013
- 2013-10-24 CN CN201320660892.9U patent/CN203673001U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675587A (en) * | 2013-10-24 | 2014-03-26 | 西安欣东源电气有限公司 | Magnetic leakage field measuring type dry-type reactor on-line monitoring device and method |
| CN107301271A (en) * | 2017-05-23 | 2017-10-27 | 哈尔滨工业大学深圳研究生院 | A kind of steel wire rope outer layer damages Magnetic Flux Leakage Inspecting Quantitative algorithm |
| CN107301271B (en) * | 2017-05-23 | 2020-05-29 | 哈尔滨工业大学深圳研究生院 | Steel wire rope outer layer damage magnetic flux leakage detection quantification method |
| WO2020258895A1 (en) * | 2019-06-28 | 2020-12-30 | 苏州大学 | Magnetic flux leakage detection probe with high sensitivity |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140625 Termination date: 20141024 |
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| EXPY | Termination of patent right or utility model |