CN105044563A - Discharge position determining device, discharge position measuring device and method - Google Patents
Discharge position determining device, discharge position measuring device and method Download PDFInfo
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- CN105044563A CN105044563A CN201510203660.4A CN201510203660A CN105044563A CN 105044563 A CN105044563 A CN 105044563A CN 201510203660 A CN201510203660 A CN 201510203660A CN 105044563 A CN105044563 A CN 105044563A
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Abstract
A discharge position determining device, a discharge position measuring device and a method of determining the discharge position by determining the position of the partial discharge in the determination of the voltage of an object are provided. Display of measured discharge or electrical voltage applied to determine the location of the discharge device (10) has to be applied voltage is provided to determine the object (1) (11); Determination of applied voltage the voltage value of the voltage detection portion (21); the magnetism detection of partial discharge detection unit (22), in a specified time to shoot from the object (1) a light camera (24); and from voltage detection portion (21) of the voltage signal, from the discharge detection unit (22) discharge detection part of the signal, and from the image pickup section (24) of the video signal and display partial discharge location in signal processing part (25). The signal processing display unit (25) has a voltage signal received from the voltage detection part (21), a discharge detection part signal from the discharge detection part (22) and a video signal from the camera part (24) to generate a display processing part of the display signal, and a display screen which displays the partial discharge and the partial discharge detection results.
Description
Technical field
The present invention relates to the discharge position determining device of the generation position of the shelf depreciation determined when voltage applies to measuring object, for this device discharge position measurement mechanism and make use of the discharge position defining method of said apparatus.
Background technology
As everyone knows, when carrying out Driven by inverter to motor, surge voltage can be caused because of the speed-sensitive switch in inverter, the insulation of motor winding is had an impact.This surge voltage is called as inverter surge, and its magnitude of voltage reaches more than 2 times of motor rated voltage sometimes.When inverter surge puts on the winding of motor, worry can produce shelf depreciation inside and outside winding.Shelf depreciation can cause the enameled wire epithelium deterioration forming winding.Epithelium deterioration finally can cause insulation breakdown, therefore, needs to carry out insulating Design in motor, even if make to apply inverter surge to this winding, also can not produce shelf depreciation.
In the past, the insulating property of the winding of motor evaluate based on partial discharge test, in this test, utilize ArrowPair (ア ロ ー ペ ア), analog sample or the stator coil such as motorette (Motorette), apply the pulse voltage of regulation, detect with or without generation shelf depreciation.The weakness place of shelf depreciation in the insulation such as space, distance between conductors are inadequate produces, and therefore, if can determine shelf depreciation generating unit, then the position of weakness becomes clear and definite, effectively can realize insulation and strengthen.
As the method detecting shelf depreciation generating unit, propose there is the method shown in patent documentation 1.Antenna as local discharge sensor is moved along the circumference of determination object stator, measures the time detected till the strongest aerial signal, the aerial position corresponding with the shortest time is defined as shelf depreciation generating unit.
In addition, in patent documentation 2, proposing to have temperature anomaly in order to monitor the electric rotating machine covered with lighttight housing, utilizing camera to take radiant light and the technology compared with normal picture.
Prior art document
Patent documentation
Patent documentation 1: Japanese Patent Laid-Open 2005-69745 publication
Patent documentation 1: No. WO2008/044263rd, International Publication
Summary of the invention
Invent technical matters to be solved
Electromagnetic wave along with shelf depreciation is unstable and the diameter of stator is less time, even if change aerial position in stator circumference, the intensity of the aerial signal produced because of shelf depreciation, detection time differ from and also do not observe clear and definite difference, are sometimes difficult to determine shelf depreciation generating unit.
In addition, according to the voltage level applied objects such as motor, sometimes can not produce shelf depreciation upon application immediately, but produce shelf depreciation after a few minutes extremely several hours.In this case, the generation of shelf depreciation can likely be leaked through.
In addition, take radiant light when utilizing camera and with normal picture compare monitor abnormal method, can be measured to temperature simultaneously and to rise the light that the light that produces and shelf depreciation produce, therefore, both are difficult to distinguish.
The present invention completes to solve the problem, and its object is to determine the generation position to shelf depreciation during measuring object applying voltage.
The technical scheme of technical solution problem
In order to achieve the above object, the present invention relates to a kind of discharge position determining device, determine, to the generation position of shelf depreciation during measuring object applying voltage, to it is characterized in that, comprise: voltage application portion, applying voltage is supplied to described measuring object by this voltage application portion; Voltage detection department, executes alive magnitude of voltage and output voltage signal described in this voltage detection department measures; Discharge examination portion, this discharge examination portion electronically or magnetism mode detect the shelf depreciation produced in described measuring object because being applied with described applying voltage; Image pickup part, this image pickup part takes the light sent from described measuring object because of described shelf depreciation at the appointed time, and output video signal; And signal transacting display part, this signal transacting display part receives from the voltage signal of described voltage detection department, from the discharge examination portion signal in described discharge examination portion and the vision signal from described image pickup part, show the generating unit of described shelf depreciation, described signal transacting display part has: Graphics Processing portion, this Graphics Processing portion receives from the voltage signal of described voltage detection department, from the discharge examination portion signal in described discharge examination portion and the vision signal from described image pickup part, generates display; And display frame, the testing result of the generating unit of described shelf depreciation and described shelf depreciation, based on described display, is presented on same picture by this display frame.
In addition, the present invention relates to a kind of discharge position measurement mechanism, measure the generation position to shelf depreciation during measuring object applying voltage, it is characterized in that, comprise: voltage detection department, described in this voltage detection department mensuration applies, execute alive magnitude of voltage and output voltage signal; Discharge examination portion, this discharge examination portion electronically or magnetism mode detect the shelf depreciation produced in described measuring object because being applied with described applying voltage; Image pickup part, this image pickup part takes the light sent from described measuring object because of described shelf depreciation at the appointed time, and output video signal; And signal transacting display part, this signal transacting display part receives from the voltage signal of described voltage detection department, from the discharge examination portion signal in described discharge examination portion and the vision signal from described image pickup part, show the generating unit of described shelf depreciation, described signal transacting display part has: Graphics Processing portion, this Graphics Processing portion receives from the voltage signal of described voltage detection department, from the discharge examination portion signal in described discharge examination portion and the vision signal from described image pickup part, generates display; And display frame, the testing result of the generating unit of described shelf depreciation and described shelf depreciation, based on described display, is presented on same picture by this display frame.
In addition, the present invention relates to a kind of discharge position defining method, determine the generating unit to shelf depreciation during measuring object applying voltage, it is characterized in that, comprise: voltage data receiving step, in this voltage data receiving step, signal transacting display part receives the voltage signal from voltage detection department; Partial Discharge Data receiving step, in this Partial Discharge Data receiving step, signal transacting display part receives the Partial Discharge Data from discharge examination portion; Video reception step, in this video reception step, signal transacting display part receives from image pickup part the vision signal that described image pickup part photographs in specific time interval; And Graphics Processing step, in this Graphics Processing step, after described voltage data receiving step, Partial Discharge Data receiving step and video reception step, Graphics Processing portion receives from the voltage signal of described voltage detection department, from the discharge examination portion signal in described discharge examination portion and the vision signal from described image pickup part, generates display.
Invention effect
According to the present invention, the generation position to shelf depreciation during measuring object applying voltage can be determined.
Accompanying drawing explanation
Fig. 1 is the block diagram of the structure of the discharge position determining device representing embodiment 1.
Fig. 2 is the block diagram of the structure of the discharge position measurement mechanism representing embodiment 1.
Fig. 3 is the schematic diagram of the example of the time variations that the voltage represented in the discharge position measurement mechanism of embodiment 1 applies.
Fig. 4 is the picture of the indication example represented in the signal transacting display part in the discharge position measurement mechanism of embodiment 1.
Fig. 5 is the process flow diagram of the step of the discharge position defining method representing embodiment 1.
Fig. 6 is the block diagram of the structure of the discharge position measurement mechanism representing embodiment 2.
Fig. 7 is the picture of the indication example represented in the signal transacting display part in the discharge position measurement mechanism of embodiment 2.
Fig. 8 is the process flow diagram of the step of the discharge position defining method representing embodiment 2.
Embodiment
Below, with reference to accompanying drawing, the discharge position determining device of embodiments of the present invention, discharge position measurement mechanism and discharge position defining method are described.Herein, common label is added to mutual same or similar part, and omits repeat specification.
[embodiment 1]
Fig. 1 is the block diagram of the structure of the discharge position determining device representing embodiment 1.Discharge position determining device 10 has executes alive voltage application portion 11 and discharge position measurement mechanism 20 to measuring object 1.
Herein, as measuring object 1, be described for twisted-pair feeder sample.In addition, twisted-pair feeder sample refers to and to be twisted by enameled wire using as sample.Twisted-pair feeder sample is twisted after sometimes enameled wire being extended 10% and is formed, and therefore, when finding defective locations now, is also suitable as the object of present embodiment.
If voltage application portion 11 starts to apply voltage, then terminate after applying state being continued the duration specified to apply voltage.The voltage applied is the pulse voltage produced with predetermined time interval.In addition, below, in present embodiment, be described to apply the situation that voltage A (Fig. 4) is pulse voltage, but applying voltage A is not limited to pulse voltage.Such as, also can be sine voltage or fixed voltage.The signal applying to start is outputted to signal transacting display part 25 described later when applying voltage by voltage application portion 11.
Fig. 2 is the block diagram of the structure representing discharge position measurement mechanism.Discharge position measurement mechanism 20 has high-voltage probe 21, discharge examination portion 22, A/D converter section 23, image pickup part 24 and signal transacting display part 25.High-voltage probe 21 is the voltage detection departments measured the voltage applied by voltage application portion 11.Discharge examination portion 22 produces shelf depreciation in measuring object 1, detect the generation of this shelf depreciation.Discharge examination portion 22 is such as the parts that tours antenna, paster antenna etc. measure means of electromagnetic waves.Or, also can be the parts of the mode that the image height electric current that frequently CT etc. produces the circuit internal cause shelf depreciation of measuring object 1 like that detects.Further, also can be the parts utilizing acoustic sensor method that the ultrasound wave produced because of shelf depreciation is detected.Which kind of parts of choice for use can consider the environmental baseline etc. when testing.
A/D converter section 23 receives the voltage signal exported from high-voltage probe 21, and is carried out analog-digital conversion (A/D conversion).In addition, A/D converter section 23 receives discharge examination portion signal B (Fig. 4) exported from discharge examination portion 22, and is carried out A/D conversion.Voltage signal after carrying out digitizing by A/D converter section 23 and discharge examination portion signal B output to signal transacting display part 25.
Image pickup part 24 during the duration in continue exposure, measuring object 1 entirety is taken, catches the light produced because of shelf depreciation, its picture signal is outputted to signal transacting display part 25.As image pickup part 24, such as, ultraviolet camera can be used.In addition, although ultraviolet camera can be 1, in order to reliably capture the luminescence from ultraviolet camera side or side overleaf of measuring object 1, also overleaf mirror can be set for side or side.Or, also multiple stage ultraviolet camera can be set.
As shown in Figure 2, signal transacting display part 25 has Graphics Processing portion 25a and display frame 25b.Graphics Processing portion 25a receive by A/D converter section 23 carried out A/D change after the applying voltage a that obtained and discharge examination portion signal b, picture signal from image pickup part 24, image data generating.Display frame 25b, based on the view data exported from Graphics Processing portion 25a, shows image described later.In addition, Graphics Processing portion 25a when receiving the signal started from the applying of voltage application portion 11, the generating process of starting image data.
Fig. 3 is the schematic diagram of the example of the time variations that the voltage represented in the discharge position measurement mechanism of embodiment 1 applies.The situation of the recurrent pulses voltage applied within the duration has been shown in Fig. 3.Pulse voltage applies repeatedly continuously within the duration of regulation, interrupts afterwards, and continues the stipulated time.When Fig. 3, within the duration of regulation, apply 18 subpulse voltages.When applying to start, send the signal applying from voltage application portion 11 to Graphics Processing portion 25.
Fig. 4 is the picture of the indication example represented in the signal transacting display part in the discharge position measurement mechanism of embodiment 1.The image shown in display frame 25b is made up of 2 parts.The image of picture 31 in left side is by the image after overlapping with measuring object 1 from the vision signal of image pickup part 24.When the luminescence not having shelf depreciation to produce in video, the image of the picture 31 in left side is only the image of measuring object 1.When video memory in luminescence, the image of the position display luminescence in the image corresponding with luminous position.
In addition, the image of the picture 31 in left side also can not be the image that ultraviolet camera produces entirely.That is, the real image of macroscopic measuring object 1 has different mensuration wavelength from the discharge generation part position seen with the ultraviolet of ultraviolet camera.Therefore, can the image of pre-recorded macroscopic measuring object 1, and be shown in display frame 25b in advance, and carry out overlapping with the video at the electric discharge position that ultraviolet camera produces.
In the image of the picture 32 on the right side in display frame 25b, transverse axis is the time.The longitudinal axis illustrates at the part 32a of upside and applies voltage a.At the part 32b of downside, discharge examination portion signal b and threshold value C is shown.In Fig. 4, picture shows the amount of 10 times in the pulse voltage in the duration.On the picture 32 on right side, relative to the pulse signal of 10 times, discharge examination portion signal B produces 7 times.Exceed threshold value C wherein 1 time.As when creating discharge examination portion signal B, threshold value C determines whether that boundary value when creating shelf depreciation sets.Therefore, when Fig. 4, may be interpreted as and create 1 shelf depreciation.
Fig. 5 is the process flow diagram of the step of the discharge position defining method representing embodiment 1.First, voltage application portion 11 pairs of measuring object 1 are utilized to apply voltage (step S01).Starting to execute alive while, apply the Graphics Processing portion 25a that commencing signal outputs to signal transacting display part 25.Apply voltage at the appointed time.In the case, the stipulated time is the time obtained after the time needed whether creating shelf depreciation under the applying voltage A in order to confirm at this moment adding surplus.
Under the state being applied with voltage as produce shelf depreciation in the twisted-pair feeder of measuring object 1 and luminescence when, utilize image pickup part 24 to make a video recording, the vision signal (step S02) utilizing signal transacting display part 25 to receive to obtain.In addition, under the state being applied with voltage, utilize high-voltage probe 21 to detect and apply voltage A, and utilize signal transacting display part 25 to receive the signal (step S03) of this applying voltage A.In addition, under the state being applied with voltage, utilize discharge examination portion 22 to detect shelf depreciation, and utilize signal transacting display part 25 to receive this discharge examination portion signal B (step S04).
Next, the Graphics Processing portion 25a of signal transacting display part 25, based on accessed vision signal, each data applying voltage signal and shelf depreciation voltage, generates display data (step S05).The generating process of the display data of Graphics Processing portion 25a and the applying commencing signal sending voltage from voltage application portion 11 simultaneously.Next, display frame 25b is presented at the display data (step S06) generated in Graphics Processing portion 25a.
Through the stipulated time, terminate to apply voltage.Next, judge whether test terminates (step S07).If show shelf depreciation position at display frame 25b, then the object tested is reached, therefore, terminates test.Situation about not being shown at shelf depreciation position or the display at shelf depreciation position unstable and be difficult to determine to produce position, the object of test is not reached, and does not terminate test.
When not terminating test (being no in step S07), increasing the voltage that voltage application portion 11 applies, and repeating step S01 to step S06.When off-test (step S07 is yes), terminate.
In above shown present embodiment, the left side picture 31 on display frame 25b can see the generation position of the shelf depreciation produced in measuring object 1.In addition, the picture 32 on the right side on display frame 25b can see the time variations applying voltage a and Partial Discharge Detection result.
Only keep left the picture 31 of side, then such as also showing when producing luminous because temperature rises, being difficult to distinguish with shelf depreciation.In present embodiment, apply voltage a and Partial Discharge Detection result by display, luminescence when luminescence when clearly can distinguish shelf depreciation and non local electric discharge.
In addition, by display Partial Discharge Detection result, shelf depreciation can be grasped and produce with the frequency of which kind of degree.
As mentioned above, according to the present embodiment, the generation position of shelf depreciation when voltage applies to measuring object 1 can be determined.
[embodiment 2]
Fig. 6 is the block diagram of the structure of the discharge position measurement mechanism representing embodiment 2.Present embodiment is the distortion of embodiment 1.Signal transacting display part 25 also has discharge level detection unit 25c and document data saving part 25d.
Fig. 7 is the picture of the indication example represented in the signal transacting display part in the discharge position measurement mechanism of embodiment 2.Discharge level detection unit 25c (Fig. 6) is according to applying pulse voltage at every turn, and the ratio of 10 times such as shown relative to the applying number of times applying voltage a and pulse voltage to the number of times of the discharge examination portion signal b exceeding threshold value c successively counts.When this ratio exceedes setting, discharge level detection unit 25c judges to apply voltage a as shelf depreciation level voltage, and on display frame 25b, output display is this situation of shelf depreciation level voltage.As decision condition, be not limited to this.Such as, also can for applied all pulse voltages, applying voltage a when discharge examination portion signal b being exceeded threshold value c is judged to be it is shelf depreciation level voltage.
Document data saving part 25d preserves the data being now sent to display frame 25b from Graphics Processing portion 25a.That is, based on the data of preserving in document data saving part 25d, picture reproduction when can be this situation of shelf depreciation level by discharge level detection unit 25c output expression.
Fig. 8 is the process flow diagram of the step of the discharge position defining method representing embodiment 2.Flow process from step S01 to step S05 is identical with embodiment 1.After step S05, determine whether shelf depreciation level (step S11).When not being judged to be shelf depreciation level (step S11 is no), increasing and applying voltage a (step S08), repeat the step of below step S01
When being judged to be shelf depreciation level (step S11 is yes), the display comprising shelf depreciation level is carried out showing (step S12).In addition, document data saving part 25d preserves the data (step S13) being now sent to display frame 25b from Graphics Processing portion 25a.Afterwards, determine whether to terminate to measure (step S07), in unclosed situation, increase and apply voltage a, repeat the step of below step S01.
According to present embodiment such above, can with the generation position of more stable state confirmation shelf depreciation.In addition, by preserving the image of this state, more correctly position can be confirmed.
[other embodiment]
Above, although the description of multiple embodiment of the present invention, but these embodiments just exemplarily present, and do not really want to limit invention scope.Such as, in embodiment, although showing applying voltage a is the situation of pulse voltage, be not limited to this.Such as, also can be the situation of sine voltage.Or, also can be time-independent fixed voltage value.
In addition, in embodiment, illustrate for twisted-pair feeder sample, but be not limited to this.Such as, if do not block the parts of ultraviolet light, infrared light or visible ray, but directly can observe their state, then can using other samples such as the end turn of a part for electric rotating machine, such as loose geometric pattern (randomwoundtype) etc. or motorette (Motorette) as measuring object with applicable the present invention.
In addition, these embodiments can be implemented by other various mode, in the scope not departing from invention main idea, can carry out various omission, displacement, change.
In the scope of the invention that these embodiments and distortion thereof are included in described in claims in the same manner as being included in scope of invention and main points and equalization thereof.
Label declaration
1 measuring object
10 discharge position determining devices
11 voltage application portion
20 discharge position measurement mechanisms
21 high-voltage probes (voltage detection department)
22 discharge examination portions
23A/D converter section
24 image pickup parts
25 signal transacting display parts
25a Graphics Processing portion
25b display frame
25c discharge level detection unit
25d document data saving part
A applies voltage
B discharge examination portion signal
C threshold value.
Claims (9)
1. a discharge position determining device, determine, to the generation position of shelf depreciation during measuring object applying voltage, to it is characterized in that, comprising:
Voltage application portion, applying voltage is supplied to described measuring object by this voltage application portion;
Voltage detection department, executes alive magnitude of voltage and output voltage signal described in this voltage detection department measures;
Discharge examination portion, this discharge examination portion electronically or magnetism mode detect the shelf depreciation produced in described measuring object because being applied with described applying voltage;
Image pickup part, this image pickup part takes the light sent from described measuring object because of described shelf depreciation at the appointed time, and output video signal; And
Signal transacting display part, this signal transacting display part receive from described voltage detection department voltage signal, from the discharge examination portion signal in described discharge examination portion and the vision signal from described image pickup part, show the generating unit of described shelf depreciation,
Described signal transacting display part has:
Graphics Processing portion, this Graphics Processing portion receives from the voltage signal of described voltage detection department, from the discharge examination portion signal in described discharge examination portion and the vision signal from described image pickup part, generates display; And
Display frame, the testing result of the generating unit of described shelf depreciation and described shelf depreciation, based on described display, is presented on same picture by this display frame.
2. discharge position determining device as claimed in claim 1, is characterized in that,
Described applying voltage is pulse voltage.
3. discharge position determining device as claimed in claim 1, is characterized in that,
Described applying voltage is sine voltage.
4. discharge position determining device as claimed any one in claims 1 to 3, is characterized in that,
Described image pickup part is ultraviolet camera.
5. the discharge position determining device according to any one of Claims 1-4, is characterized in that,
Described signal transacting display part also has:
Discharge level detection unit, this discharge level detection unit, when the number of times that the discharge examination portion signal from described discharge examination portion exceedes defined threshold exceedes reference value relative to the ratio of the applying number of times of described voltage, is judged to create described shelf depreciation; And
Document data saving part, this document data saving part is judged to create described shelf depreciation in described electric discharge detection unit, preserve from the voltage signal of described voltage detection department, from the discharge examination portion signal in described discharge examination portion and the vision signal from described image pickup part.
6. discharge position determining device as claimed in claim 5, is characterized in that,
Described Graphics Processing portion is judged to create described shelf depreciation in described electric discharge detection unit, will represent that the displaying contents creating this situation of shelf depreciation outputs to described signal transacting display part.
7. a discharge position measurement mechanism, measure the generation position to shelf depreciation during measuring object applying voltage, it is characterized in that, comprising:
Voltage detection department, executes alive magnitude of voltage and output voltage signal described in this voltage detection department mensuration applies;
Discharge examination portion, this discharge examination portion electronically or magnetism mode detect the shelf depreciation produced in described measuring object because being applied with described applying voltage;
Image pickup part, this image pickup part takes the light sent from described measuring object because of described shelf depreciation at the appointed time, and output video signal; And
Signal transacting display part, this signal transacting display part receive from described voltage detection department voltage signal, from the discharge examination portion signal in described discharge examination portion and the vision signal from described image pickup part, show the generating unit of described shelf depreciation,
Described signal transacting display part has:
Graphics Processing portion, this Graphics Processing portion receives from the voltage signal of described voltage detection department, from the discharge examination portion signal in described discharge examination portion and the vision signal from described image pickup part, generates display; And
Display frame, the testing result of the generating unit of described shelf depreciation and described shelf depreciation, based on described display, is presented on same picture by this display frame.
8. a discharge position defining method, determine, to the generating unit of shelf depreciation during measuring object applying voltage, to it is characterized in that, comprising:
Voltage data receiving step, in this voltage data receiving step, signal transacting display part receives the voltage signal from voltage detection department;
Partial Discharge Data receiving step, in this Partial Discharge Data receiving step, signal transacting display part receives the Partial Discharge Data from discharge examination portion;
Video reception step, in this video reception step, signal transacting display part receives from image pickup part the vision signal that described image pickup part photographs in specific time interval; And
Graphics Processing step, in this Graphics Processing step, after described voltage data receiving step, Partial Discharge Data receiving step and video reception step, Graphics Processing portion receives from the voltage signal of described voltage detection department, from the discharge examination portion signal in described discharge examination portion and the vision signal from described image pickup part, generates display.
9. discharge position defining method as claimed in claim 8, is characterized in that,
Also have determination step, in this determination step, discharge level detection unit determines whether to create described shelf depreciation,
There is in described Graphics Processing step shelf depreciation and produce step display, this shelf depreciation produces in step display, when being judged to create described shelf depreciation in described determination step, described Graphics Processing portion also will represent that the displaying contents creating this situation of shelf depreciation outputs to display frame.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2014090413A JP6158134B2 (en) | 2014-04-24 | 2014-04-24 | Discharge position specifying device, discharge position measuring device, and discharge position specifying method |
| JP2014-090413 | 2014-04-24 |
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| CN105044563A true CN105044563A (en) | 2015-11-11 |
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Cited By (1)
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| CN111133322A (en) * | 2017-09-28 | 2020-05-08 | 西门子股份公司 | Passive component for proving an electrical overload in a rotating electrical machine |
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Also Published As
| Publication number | Publication date |
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| CN105044563B (en) | 2018-09-28 |
| JP2015210130A (en) | 2015-11-24 |
| JP6158134B2 (en) | 2017-07-05 |
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