CN205643427U - Generator rotor is index repetitive pulse generating device for turn -to -turn short circuit - Google Patents
Generator rotor is index repetitive pulse generating device for turn -to -turn short circuit Download PDFInfo
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- CN205643427U CN205643427U CN201620388261.XU CN201620388261U CN205643427U CN 205643427 U CN205643427 U CN 205643427U CN 201620388261 U CN201620388261 U CN 201620388261U CN 205643427 U CN205643427 U CN 205643427U
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Abstract
The utility model discloses a generator rotor is index repetitive pulse generating device for turn -to -turn short circuit mainly includes 220VAC socket, frequency transformer T1, repetitive pulse generation unit G1 and load resistance R2. The utility model discloses a nanosecond level steep -front index repetitive pulse generating device can produce nanosecond level steep pulse to the circuit parameter that the accessible was adjusted among the repetitive pulse generation unit G1 conveniently changes rising edge of a pulse time and pulse width. This repetitive pulse generating device is used for generator rotor turn to turn short -circuit fault's the time measuring that examines, can accurately acquire the response pulse and the originated moment of the inside and outside collecting ring of generator, has improved accuracy and reliability that generator rotor turn to turn short -circuit fault detected and fixed a position. Frequency transformer T1 adopts runway type magnetic core skeleton and adopts the isolation structure, consequently the utility model discloses a level steep -front index repetitive pulse generating device had characteristics safe in utilization nanosecond.
Description
Technical field
This utility model relates to Electric Power Equipment Insulation detection technique and application thereof, particularly relates to electromotor
Rotor inter-turn short circuit fault detection and location correlative technology field.
Background technology
Now, world's generated energy about 80% is provided by steam turbine generator.Along with developing rapidly of China's power industry,
Large turbo-type generator has become main force's unit of domestic a few bulk power grid the most.Showing according to document, 2009 complete
In state's installed gross capacity of generating equipments, the fired power generating unit of 100MW and above capacity accounts for thermoelectricity installation total capacity
80.38%.But, the maximization of generating equipment necessarily causes single-machine capacity to account for the increase of electrical network total capacity ratio,
Large-scale steamer generating equipment reliability of operation and safety are particularly important and prominent, and it directly affects power plant
Stable operation.The most such unit breaks down, the most pernicious fault, will give power system and
National economy brings huge economic loss.
In each ingredient of large turbo-type generator, rotor is in high speed rotating state, subjects very
Big mechanical stress and thermic load, the fault detect to rotor is just particularly important.Due in manufacture process
Bad and all kinds of dynamo-electric effects in running the impacts of processing technique, the rotor windings warp of large turbo-type generator
Often there will be contacting between circle with circle, i.e. cause the generation of rotor interturn short-circuit fault.Transport at the scene
Rotor interturn short-circuit fault in row is one relatively common in all kinds of fault of electromotor, is also impact
One of major reason of safe operation.
There is slight turn-to-turn short circuit and exciter current of generator rising, reactive power will be caused relative in rotor windings
Decline, bearing unbalance vibration increases.Once the order of severity of rotor inter-turn short circuit increases, it will cause turning
The generation of son a little the most even two points ground fault fault so that rotor main shaft's magnetizing, severe patient also will burn axle journal and
Bearing shell, constitutes grave danger to the safe and stable operation of unit itself.In view of the foregoing, industrial quarters is to vapour
Turbine generator rotor inter-turn short circuit fault has carried out correlational study.
By the information that magnetic flux detector generates, utility model patent 03148934.6 identifies that electromotor turns automatically
Sub-turn-to-turn short circuit, and send relevant information by alarm function to teleoperator.Utility model patent
CN201310153154.X discloses a kind of Short Circuit Between Generator Rotor Windings method for diagnosing faults and system, according to
Feature difference under generator amature normal condition and malfunction carries out assessment of failure and judgement.
CN102721903 discloses detection device and the detection side thereof of a kind of generator amature insulation between coils fault
Method, carries out Site Detection using signal generator and digital oscilloscope as nucleus module.Utility model patent
CN102809727A proposes a kind of Short Circuit Between Generator Rotor Windings fault detection method based on Frequency Response Analysis, logical
Cross the transition-line analogy pulse propagation characteristic in the rotor that a RLC is constituted, analyze rotor turn-to-turn fault.Real
Propose a kind of short based on multisensor united rotor of steam turbo generator turn-to-turn with new patent CN103823150A
Road method for diagnosing faults, utilizes the different types of sensor being installed on the multiple position of electromotor to be gathered many
Plant Failure Characteristic Parameter and respective threshold value is respectively calculated, obtain carrying out according to every kind of Failure Characteristic Parameter
Fault eigenvalue during diagnosis, then the reliability of the different diagnostic methods of foundation is to each fault eigenvalue right of distribution
Weight, eventually through the size identification steam turbine generator comparing this weighted sum and composite thresholds whether exist rotor around
Group shorted-turn fault.Utility model patent CN104155567 discloses a kind of double-fed type generator amature circle
Between the localization method of short fault location, by search coil and electrooptical device, generator amature groove is compiled
Number and determine fault location.Utility model patent CN104808142A discloses a kind of simulation double-fed generator and turns
The device and method of sub-short trouble, can simulate double-fed generator amature each short trouble type, and used
The structure of motor is identical with the structure of true double-fed generator, it is achieved that the mould of controlled each short trouble
Intend.
Knowable to technical characteristic disclosed in above-mentioned patent, its research emphasis essentially consist in the means of Site Detection with
Diagnostic method, the achievement in research in terms of performance boost own for detecting instrument is less.This utility model is open
Short Circuit Between Generator Rotor Windings index repetition pulse generating means, mainly from detection device itself feature
Set out, be conceived to how to obtain and detect data accurately, thus provide solid for fault diagnosis, objectively count
According to basis.
Utility model content
In order to overcome drawbacks described above, this utility model provides a kind of Short Circuit Between Generator Rotor Windings index to repeat
Pulse generating unit, has the features such as safe, portable, flexible and accurate, solves current generator rotor
The rising edge steepness of interturn short-circuit failure diagnosing device and pulse width can not adjust and cause turn-to-turn fault position
The problem of location misalignment, improves the technical merit of association area, compensate for detection technique in actual applications
Deficiency.
In order to realize foregoing invention purpose, this utility model by the following technical solutions: generator amature turn-to-turn
Short circuit index repetition pulse generating means, is occurred by AC power supplies socket, Industrial Frequency Transformer T1, repetition pulse
Unit G1 and load resistance R2 composition.Described AC power supplies socket has three contact points, wherein contact points
G ground connection, contact point N (zero line) limit former with transformator T1 1 foot is connected, contact point L (live wire) and transformation
Device T1 former limit 2 foot is connected.Described Industrial Frequency Transformer secondary 3 foot and 1 point of repetition pulse generating unit G1
Being connected, 2 of transformer secondary 4 foot and repetition pulse generating unit G1 are connected.Described repetition pulse occurs
3 feet of unit G1 are connected with one end of load resistance R2,4 feet of repetition pulse generating unit G1 and load
The other end of resistance R2 is connected.
Described Industrial Frequency Transformer T1 uses racetrack core structure, and former limit input voltage virtual value is 220VAC,
Secondary output voltage virtual value is 80VAC.Described Industrial Frequency Transformer T1 transformator uses isolation structure, former limit
Being electrically isolated completely to secondary, have tap in the middle of secondary, tap is common ground end.Described Industrial Frequency Transformer
The T1 class of insulation is for being not less than 2kV.
Described repetition pulse generating unit G1 is mainly by diode D1, diode D2, IGCT S1, voltage stabilizing
Electric capacity C1, current-limiting resistance R1, pulse front edge regulation electric capacity C2, pulse back edge regulation electric capacity C3, diode
D5, D6, D7 are constituted.Input port 1 and the diode IGCT D1 of described repetition pulse generating unit G1
Anode be connected；Input port 2 is connected with the anode of diode IGCT D2；The negative electrode of diode D1 with
The negative electrode of diode D2 is connected；One end of the negative electrode of diode D2 and electric capacity of voltage regulation C1 and current-limiting resistance R1
One end be connected, the other end of current-limiting resistance R1 simultaneously with anode, the anode of diode D5 of IGCT S1
And one end of pulse front edge regulation electric capacity C2 is connected；The other end of electric capacity of voltage regulation C1 regulates with pulse front edge
The other end of electric capacity C2 is connected；The other end of pulse front edge regulation electric capacity C2 is connected with the negative electrode of diode D7；
The negative electrode of diode D5 is connected with the negative electrode of diode D6；The anode of diode D6 and the door of IGCT S1
The most connected；The negative electrode of IGCT S1 and pulse back edge regulate one end and the anode of diode D7 of electric capacity C3
It is connected；The other end of pulse back edge regulation electric capacity C3 is connected with the negative electrode of diode D7；The sun of diode D7
Pole is connected to output port 3, and the negative electrode of diode D7 is connected to output port 4.
After using technique scheme, this utility model at least has the advantage that
1, this utility model uses isolated architecture design, and transformator has enough dielectric levels, it is ensured that people
Safety during member's operating instrument；
2, device volume described in the utility model is little, lightweight；
When 3, using this utility model to carry out Site Detection, operator are by regulation repetition pulse generating unit
The pulse front edge regulation electric capacity C2 and pulse back edge regulation electric capacity C3 of G1, it is convenient to adjust high frequency and repeat
Index rising edge, trailing edge and the pulse width of pulse.Improve the efficiency of staff's detection, by adjusting
The leading-edge steepness of joint pulse can improve the judgement order of accuarcy of initial time, thus improves positioning precision.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment technical scheme, institute in embodiment being described below
The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only this practicality
Novel in order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below by p-
In embodiment or description of the prior art, the required accompanying drawing used is briefly described, skill common for this area
From the point of view of art personnel, on the premise of not paying creative work, it is also possible to obtain other according to these accompanying drawings
Accompanying drawing.
Fig. 1 is that the composition of this utility model Short Circuit Between Generator Rotor Windings index repetition pulse generating means shows
It is intended to.
Fig. 2 is the weight of this utility model Short Circuit Between Generator Rotor Windings index repetition pulse generating means pulse
Recovering pulse generating unit G1 forms schematic diagram substantially.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, to the technical side in this utility model embodiment
Case is clearly and completely described, it is clear that described embodiment is only that this utility model part is real
Execute example rather than whole embodiments.Based on the embodiment in this utility model, ordinary skill people
The every other embodiment that member is obtained under not making creative work premise, broadly falls into this utility model
The scope of protection.
As it is shown in figure 1, Short Circuit Between Generator Rotor Windings index repetition pulse generating means, mainly by AC electricity
Supply socket, Industrial Frequency Transformer T1, single-phase full bridge rectification circuit H1, repetition pulse generating unit G1 and negative
Carry resistance R2 composition.
As in figure 2 it is shown, repetition pulse generating unit G1 is mainly by diode D1, diode D2, IGCT
S1, electric capacity of voltage regulation C1, current-limiting resistance R1, pulse front edge regulate electric capacity C2, pulse back edge regulates electric capacity C3,
Diode D5, D6, D7 are constituted.The input port 1 of described repetition pulse generating unit G1 is brilliant with diode
The anode of brake tube D1 is connected；Input port 2 is connected with the anode of diode IGCT D2；Diode D1's
Negative electrode is connected with the negative electrode of diode D2；One end of the negative electrode of diode D2 and electric capacity of voltage regulation C1 and current limliting
One end of resistance R1 is connected, the other end of current-limiting resistance R1 simultaneously with anode, the diode D5 of IGCT S1
Anode and pulse front edge regulation electric capacity C2 one end be connected；Before the other end of electric capacity of voltage regulation C1 and pulse
The other end along regulation electric capacity C2 is connected；The other end of pulse front edge regulation electric capacity C2 and the moon of diode D7
The most connected；The negative electrode of diode D5 is connected with the negative electrode of diode D6；The anode of diode D6 and IGCT
The gate pole of S1 is connected；The negative electrode of IGCT S1 and pulse back edge regulate one end and the diode D7 of electric capacity C3
Anode be connected；The other end of pulse back edge regulation electric capacity C3 is connected with the negative electrode of diode D7；Diode
The anode of D7 is connected to output port 3, and the negative electrode of diode D7 is connected to output port 4.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model,
All within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, all
Within protection domain of the present utility model should be included in.
Claims (3)
1. Short Circuit Between Generator Rotor Windings index repetition pulse generating means, it is characterised in that: by AC electricity
Supply socket, Industrial Frequency Transformer T1, repetition pulse generating unit G1 and load resistance R2 composition；
Described AC power supplies socket has three contact points, wherein contact point G ground connection, contact point N be zero line and
Limit 1 former with transformator T1 foot is connected, and contact point L is live wire and limit former with transformator T1 2 foot is connected；
1 of described Industrial Frequency Transformer secondary 3 foot and repetition pulse generating unit G1 is connected, transformer secondary
2 of 4 feet and repetition pulse generating unit G1 are connected；
Described 3 feet of repetition pulse generating unit G1 are connected with one end of load resistance R2, and repetition pulse is sent out
4 feet of raw unit G1 are connected with the other end of load resistance R2.
Short Circuit Between Generator Rotor Windings index repetition pulse generating means the most according to claim 1,
It is characterized in that: described Industrial Frequency Transformer T1 uses the racetrack core structure, former limit input voltage virtual value to be
220VAC, secondary output voltage virtual value is 80VAC, has tap in the middle of secondary, and tap is common ground end；
Described Industrial Frequency Transformer T1 transformator uses isolation structure, primary and secondary side electrical isolation；Described power frequency transformation
The device T1 class of insulation is for being not less than 2kV.
Short Circuit Between Generator Rotor Windings index repetition pulse generating means the most according to claim 1,
It is characterized in that: described repetition pulse generating unit G1 is mainly by diode D1, diode D2, IGCT
S1, electric capacity of voltage regulation C1, current-limiting resistance R1, pulse front edge regulate electric capacity C2, pulse back edge regulates electric capacity C3,
Diode D5, D6, D7 are constituted；The input port 1 of described repetition pulse generating unit G1 is brilliant with diode
The anode of brake tube D1 is connected；Input port 2 is connected with the anode of diode IGCT D2；Diode D1's
Negative electrode is connected with the negative electrode of diode D2；One end of the negative electrode of diode D2 and electric capacity of voltage regulation C1 and current limliting
One end of resistance R1 is connected, the other end of current-limiting resistance R1 simultaneously with anode, the diode D5 of IGCT S1
Anode and pulse front edge regulation electric capacity C2 one end be connected；Before the other end of electric capacity of voltage regulation C1 and pulse
The other end along regulation electric capacity C2 is connected；The other end of pulse front edge regulation electric capacity C2 and the moon of diode D7
The most connected；The negative electrode of diode D5 is connected with the negative electrode of diode D6；The anode of diode D6 and IGCT
The gate pole of S1 is connected；The negative electrode of IGCT S1 and pulse back edge regulate one end and the diode D7 of electric capacity C3
Anode be connected；The other end of pulse back edge regulation electric capacity C3 is connected with the negative electrode of diode D7；Diode
The anode of D7 is connected to output port 3, and the negative electrode of diode D7 is connected to output port 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620388261.XU CN205643427U (en) | 2016-04-29 | 2016-04-29 | Generator rotor is index repetitive pulse generating device for turn -to -turn short circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620388261.XU CN205643427U (en) | 2016-04-29 | 2016-04-29 | Generator rotor is index repetitive pulse generating device for turn -to -turn short circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205643427U true CN205643427U (en) | 2016-10-12 |
Family
ID=57060010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620388261.XU Expired - Fee Related CN205643427U (en) | 2016-04-29 | 2016-04-29 | Generator rotor is index repetitive pulse generating device for turn -to -turn short circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205643427U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107015148A (en) * | 2017-04-28 | 2017-08-04 | 西安康倍机电科技有限公司 | A kind of motor turn-to-turn short circuit tester based on repetition pulse method |
| CN107741555A (en) * | 2017-10-13 | 2018-02-27 | 国网河北能源技术服务有限公司 | Switchgear divide-shut brake coil turn-to-turn insulation tube arrester signature waveform generating means |
-
2016
- 2016-04-29 CN CN201620388261.XU patent/CN205643427U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107015148A (en) * | 2017-04-28 | 2017-08-04 | 西安康倍机电科技有限公司 | A kind of motor turn-to-turn short circuit tester based on repetition pulse method |
| CN107741555A (en) * | 2017-10-13 | 2018-02-27 | 国网河北能源技术服务有限公司 | Switchgear divide-shut brake coil turn-to-turn insulation tube arrester signature waveform generating means |
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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: 20161012 Termination date: 20180429 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |