aspects of partial discharge measurement
DESCRIPTION
Aspects of partial discharge measurement. 1 Introduction 2 Historical overview 3 Digital measuring techniques 4 Future trends 5 Summary. Aspects of partial discharge measurement. 1 Introduction. why it´s necessary to know more about partial discharges (pd)?. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/1.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
1 Introduction2 Historical overview
3 Digital measuring techniques
4 Future trends
5 Summary
Aspects of partial discharge measurement
![Page 2: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/2.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
1 Introduction
Aspects of partial discharge measurement
![Page 3: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/3.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
why it´s necessary to know more about partial discharges (pd)?
![Page 4: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/4.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
For avoiding outages of electri-cal power supply the measure-ment of pd´s seems to be neces-sary
![Page 5: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/5.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
pd´s can be an indicator for „weak points“ into the electrical insulation !
pd might be caused by
poor design of the insulation
failures during manufacturing or assembling
failures by electrical, thermal, mechanical, …
overstress in operation
normal ageing or degradation processes
![Page 6: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/6.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
the pd- measurement as an important tool for quality control is used not only in the electrical power engineering, but more and more in other application fields of electrical insulation
low voltage power devices
(motors, transformers, .. )
electronic devices
…
![Page 7: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/7.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
typical quality defects in MV- GIS
- particle on the insulators
-missing bolts or bad contacts
on conductor- connections
- free potential components
- microvoids into insulators
- . . .
![Page 8: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/8.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
protrusions on conductive sheets
microvoids
cracks(conductive, insulated)
typical quality defects in power cables
![Page 9: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/9.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
typical quality defects in power cables
water tree (wt)
wt + electrical tree
![Page 10: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/10.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
typical quality defects in power cables
oil- paper cable connectors
![Page 11: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/11.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
basic questions for pd measurement
how pd´s can be measured ? principles sensitivity
kind of failure („weak points“) ? identification dangerousness where pd´s (weak points) are located ? localization
![Page 12: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/12.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
1 Introduction2 Historical overview
Aspects of partial discharge measurement
![Page 13: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/13.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
Historical overview
[G.C.Lichtenberg, 1777)]
![Page 14: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/14.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
Historical overview
detection of failures on overhead lines and power transformers
(B.Koske 1939)
![Page 15: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/15.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
measurement principles
1:Tp / T2 = 1 µs / 5 µs2:Tp / T2 = 5 ns / 50 ns3:Tp / T2 = 5 ns / 20 ns
dtetitiFjF tj )()}({)(
)()( 0FjFq
apparent charge q
![Page 16: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/16.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
first devices
![Page 17: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/17.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
narrowband measuring devices
less disturbances
easy handling
no special experiences
![Page 18: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/18.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
broadband measuring devices
more suszeptibly to noise, disturbances
special knowledge is requested
more information about the pd- processes
![Page 19: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/19.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
first devices
![Page 20: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/20.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
measurement principles
[IEC 60270]
![Page 21: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/21.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
real pd spectra
![Page 22: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/22.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
Standardized measuring circuit
[IEC 270, 60270]
![Page 23: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/23.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
How dangerous are pd´s ?
%
80
60
40
20
kV/mm
10-3
10-2
10-1
100
10-3 10-2 10-1 100 101
50 Hz / 20 °C
50 Hz / 20 °C
moisture of paper wV
erl
us
tfa
kto
r ta
n
Qkrit = ? more informations about the pd- processes
were necessary !
Is there any correlation between the measured charge and the lifetime ?
![Page 24: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/24.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
Aspects of partial discharge measurement
[Izeki, Tatsuta, 1984]
![Page 25: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/25.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
Aspects of partial discharge measurement
![Page 26: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/26.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
Aspects of partial discharge measurement
![Page 27: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/27.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
Aspects of partial discharge measurement
typical PRPP
![Page 28: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/28.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
1 Introduction2 Historical overview
3 Digital measuring techniques
Aspects of partial discharge measurement
![Page 29: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/29.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
digital measurement techniques
![Page 30: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/30.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
digital measurement techniques
![Page 31: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/31.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
digital measurement techniques
![Page 32: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/32.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
digital measurement techniques
![Page 33: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/33.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
digital measurement techniques
![Page 34: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/34.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
digital measurement techniques
![Page 35: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/35.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
digital measurement techniques
recognition
diagnosis
1
2
n
data acquisition
analysis,
model
database
action
cbm, service,
risk assess-ment
sensors
![Page 36: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/36.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
digital measurement techniques
![Page 37: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/37.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
statistical parameters of pd´s
[see also Gulski, 1991]
![Page 38: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/38.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
digital measurement techniques
statistical data of typical pd- sources stored in a database
diagnostic (expert) system
![Page 39: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/39.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
Aspects of partial discharge measurement
measured pd - pattern
typical pd- reference -data -base
of available pd- systems
?
product- specifical- pd- data
must be obtained !
![Page 40: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/40.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
Aspects of partial discharge measurement
high measuring sensitivity
high susceptibility to noise, disturbances, …
![Page 41: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/41.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
Sources of electromagnetic disturbances
1 net connection
2, 11 power supply
3 hv- transformer
4 low pass filter
5 hv leads
6 coupling cap.
7 free potential obj.
8 stochastic disturb.
9 periodic disturb.
10 ground
![Page 42: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/42.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
suppression of disturbances
[Lemke, 1981]
radio/HF- suppression impuls- suppression
reflection- suppression
amplifyer processingelectronic integrator
![Page 43: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/43.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
suppression of disturbances
![Page 44: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/44.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
suppression of disturbances
screening of the testroom
![Page 45: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/45.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
suppression of disturbances
noise signals, caused by SFC- generator, located in the same testroom
new methods for suppression of disturbances are requested
![Page 46: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/46.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
localization of the pd- producing „weak points“ ?
classical method (reflectrometry)
non electrical (classical) methods
(acoustical, optical, …)
ultra- high- frequency method (UHF)
(electromagnetic field , combined with
acoustic measurement)
![Page 47: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/47.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
(classical) principle of reflectrometry
![Page 48: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/48.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
1
2 3
A B C D
Richtkoppler Richtkoppler
Signal an Kopplerausgang Impulsherkunft / -Nr. A B C D Muffe / 1 – X X – Kabel links / 2 X – X – Kabel rechts / 3 – X – X
methods of failure localizationin cable- joints -1
![Page 49: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/49.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
methods of failure localizationin cable- joints -2
1‘1‘
1
1‘‘
2‘
2‘
2
3‘
3‘
3
+ –
1 2 3
1‘ 2‘ 3‘
1‘‘ 2‘‘ 3‘‘
2‘‘ =0 3‘‘ =0
RogowskispuleRogowskispule
Muffe
Signal- summierer
DisplayOriginalimpulse
Impulse nach Durchlaufen der Rogowskispulen
Impulse nach Durchlaufen des Signal-Summierers
![Page 50: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/50.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
methods of failure localization(classical acoustic method)
![Page 51: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/51.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
1 Introduction2 Historical overview
3 Digital measuring techniques
4 Future trends
Aspects of partial discharge measurement
![Page 52: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/52.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
future trends
measuring sensitivity vs noise, disturbances
(digital procedures, neuronal networks)
interpretation of pd- parameter
(identifying, correlation to the lifetime)
localization of defects on site testing
![Page 53: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/53.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
spectral analyzing of pd
![Page 54: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/54.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
spectral analyzing of pd
zero span
pd source
![Page 55: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/55.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
digital de- noising
![Page 56: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/56.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
digital de- noising
[Kranz, 1996]
![Page 57: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/57.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
identification of pd sources
![Page 58: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/58.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
identification of pd sources
![Page 59: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/59.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
identification of pd sources
![Page 60: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/60.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
identification of pd sources
![Page 61: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/61.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
identification of pd sources
![Page 62: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/62.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
identification of pd sources
![Page 63: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/63.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
multichannel pd measurement
![Page 64: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/64.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
multichannel pd measurement
![Page 65: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/65.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
dangerousness of pd
![Page 66: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/66.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
dangerousness of pd
for better understanding the physical processes of damaging or deterioration of insulation more/ other informations about the pd- processes seem to be necessary
- Δupd
- Δwpd
- …
![Page 67: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/67.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
new parameters of pd- processes
![Page 68: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/68.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
new parameters of pd- processes
![Page 69: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/69.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
new methods of failure localization
![Page 70: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/70.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
new methods of failure localization
![Page 71: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/71.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
new methods of failure localization(combined UHF - acoustic method)
[Markalous, 2006]
acoustic measurement will be triggered by UHF- signal
![Page 72: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/72.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
1 Introduction2 Historical overview
3 Digital measuring techniques
4 Future trends
5 Summary
Aspects of partial discharge measurement
![Page 73: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/73.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
summary
pd measurements are up to now an essen-
tial tool for quality testing of electrical insulation
and diagnostic purposes
progress in digital techniques makes it possible
getting more informations about pd`s at
increased sensitivity
![Page 74: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/74.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
summary
basic investigations of insulation materials for
finding a correlation between pd- parameters
and lifetime
increasing measuring sensitivity for diagnostic
measurements even under on- site conditions
(new methods of filtering, neuronal networks, ..)
using combined techniques for improved
localization
![Page 75: Aspects of partial discharge measurement](https://reader036.vdocuments.us/reader036/viewer/2022081504/56814747550346895db484b4/html5/thumbnails/75.jpg)
Prof .Dr.-Ing.habil. Rainer Haller Electrical Power & Environmental Engineering University of West Bohemia Pilsen/ Czech Republik
Thank you
Questions ?
& Answers !