John G. Buchan PhD.pdf - OpenAIR @ RGU - Robert Gordon ...

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CS (ms)ý-r--- -ý---ýR/2 ýý R/z .R/2 .Lý R!ýýýýýýCoil -SectionFigure 5.1.4 - Ladder Network of Machine Windingby LewisL/ L/2Co-Coil SectionFigure 5.1.5 -Lumped Parameter Winding ModelMeyerbyPage. 269
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OpenAIR@RGUThe Open Access Institut
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DECLARATIONI hereby declare that th
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CHAPTER FOUR DEVELOPMENT AND PERFOR
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My help comes from the Lord, whomad
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CHAPTER ONEINTRODUCTION
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motors ratings were not reported ).
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surfaces from spark erosion which i
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Another source of rotor bar overhea
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TurnInsulationConductorFigure 1.4.1
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Figure 1.5.1- Failure Modes in High
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insulation swells .Thermal cycling
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Abrasionpoints .Figure 1.5.2 -Endwi
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pole closure will result in a steep
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Internal discharges take place in s
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The voltage Vc, developed across th
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, uJoules), have shown that the cry
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discharges of this type damage both
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1.6 High Voltage Insulation Diagnos
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V0IRsdParallelcircuitSeries circuit
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At bridge balance position the rati
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circuit effect partial discharges h
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idge is balanced by adjusting the v
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observed as a ripple effect distort
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generalisations are discussed in th
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When a discharge takes place in the
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obtain the balance condition. Any d
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I-rFigure 1.6.2.3-Passive Resonant
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that of a calibration pulse .The ca
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Figure 1.6.2.7-Point to Hemi-sphere
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Thyris for ControllerFluorescent Li
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ejects unwanted signals which are r
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The first to recognise the importan
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Pulse HeightDistribution100-I22k:Po
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High intensity slot discharge, as o
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RYBFrequencyMeter /SpectrumAnalyser
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signal level have been detected by
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primary, (the coil conductor), and
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CHAPTER TWODISCHARGE PULSE PROPAGAT
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velocities and attenuation .Tests w
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The coils are typical of those used
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Ri-ZO N Zc-i-Figure 2.2.2 - Star co
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aglePulseGeneratorTo C. R. T. --Dis
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It is apparent from the waveform th
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a- conductor heightb- interturn ins
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v=c. ( 1+ de/ds)(, /-E-r + de/ds)Th
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time through the coil with the exte
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are manifested in the observed coil
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which , for the values of L and C,
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In the study of steep fronted wave
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RonEMEME ý`®um®olp-PRI_wanommen-
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Velocity of propagation based on ti
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ecording the transit time of a sinu
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li ad/volfnauenryResponse of P6chne
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L is the self inductance of the win
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VouVinFrequency Response of &chine
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wavelength is equal to the length o
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Source ResistanceWindingInductanceL
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frequency of 113.5 kHz , which corr
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2 VJdivo, s u/divD, 5, usec/divFigu
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2 V/div0,5 Vld1V0,5, usec/di vFigur
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ýýýannýýýýý! M®®zz®awa 9
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%I"ou,., Vinfrequency Response of !
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and the given boundary conditions a
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No. of Wavelengths Frequency Freque
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duration of approximately 1 usec an
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MO MESolU®®EM®Ný®®ýý®®rod
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a ® u ®ýsI®®®! ýsIR, rmm ®a
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lMENNENE®®ES®wmwwwwý®wwwwýiil
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AmplitudeResponse". 09,50,0ý. --'-
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CHAPTER THREETHE ROGOWSKI COIL IN P
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i. Sensitivity depends on the perme
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which,e=M.Lp....(3.2)dtThis equatio
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which on integrating w. r. t. time
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device has a poorer response at low
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tilt = R. tp x 100Lwhere tp is the
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The rise time of such a coil is les
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ii. Passive integration ;This metho
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ZSzoipm--QPulse GeneratorýFigure 3
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Ratio 0TZT,15\\ITimeFigure 3.6.1.3
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The output voltage of the integrato
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The general expression for the-self
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coil resistance at frequencies at w
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3.8 Narrowband Current MeasurementI
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parallel circuit is therefore most
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and is given by equation,vm(t) = Ip
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DischargePulse50mV/cm CoilOutputFas
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i. The partial discharge current pu
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4.1 Principle of Location Technique
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ff(t').R12() = lm 1 f (t'+ + (f, -1
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position in time when the pulse wav
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Although information regarding the
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A microcomputer is used to supervis
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CurrentsignalRogowskicoilIntegrator
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Figure 4.2.1.2-Discharge Detection
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Z' = 100fito 4000j,, and delays of
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DelaylineRelayDriverMercury-WettedR
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Delay LineOutput2 V/div0,2 uses/div
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ComplementaryoutputsDelaylineUnity
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ThresholdlevelýhPulseJitter.1Figur
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VYThreshädý-ýý_timeTwa(kTwalkAm
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having used the scanning technique
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Figure 4.2.5.1-MICA : Machine Insul
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Figure 4.3.1-Discharge Injection Te
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The position of the discharge sourc
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4.4.2 Effect of Discrimination Leve
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obtain pulse coincidence.The scan s
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The experiment in section 4.4.1 is
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Pulse Injection Channel Position De
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Location Scan of Stator Winding186-
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It is assumed that for these dimens
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Pulse Injection Channel Position De
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internal partial discharges and sur
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winding . The corresponding locatio
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The spurious location on channel 25
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0,5 V/div0,5 V/div1, usec/divFigure
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LocationSconof Stator Windingi00-0
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However,the second location is not
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shown in figure 4.4.5.12 indicates
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ii. At a distance between sources o
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The threshold voltage levels at the
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It is recalled ,from the previous d
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There are five scans which correspo
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Location Scan of Stator Windingiea_
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correct locations obtained from-the
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Locotion Scan of Stotor Windinglea.
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Injection Points Channel PositionPu
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2 VJdy1, usec/divFigure 4.4.7.8 - W
Page 510: LocationScanof Stator Windingiea,(a
Page 514: 0. 4116Figure 4.5.1-Spark Gap Disch
Page 518: In the first scan the discharge sou
Page 522: Micro-computerData interfaceI RS232
Page 526: __L_IJ+v DreaKOown I-A&.--,/A \AA/v
Page 530: Location Soon of Stator Winding1IIR
Page 534: Injection Point Location Positions
Page 538: HV Supply500O PF1Couplingcapaciiaý
Page 542: Location Scan of Stator Winding1Be.
Page 546: MetallicScreeniýiIIIIFigure 4.5.2.
Page 550: CHAPTER FIVETHEORETICAL MODEL OF A
Page 554: kL1J11 'I_mri_rT9nnnnnnnnnTPIron co
Page 558: Figure 5.1.2 - Rudenbergs Machine W
Page 564: A comprehensive study was carried o
Page 568: Oraee & McLaren [101] followed the
Page 572: a complex , electromagnetic , finit
Page 576: mode -(transverse electromagnetic m
Page 580: EndwindingJunction 2Junction 3SlotJ
Page 584: 5.3.1. Derivation of Scatter Matrix
Page 588: inrvol" [yo 00"ýIv2v3I0 yiyni2 y2
Page 592: 1000000 -11000000 -11000000-1100000
Page 596: C9111 1n11111-1 t.ý-4T f; ' Co, KC
Page 600: 5.4 Computer AnalysisA suite of FOR
Page 604: Therefore, by computing the respons
Page 608: STARTSection 1Set . time andinitial
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STARTFigure 5.4.3.5 - Flow Diagram
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system for conductors in the coil m
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variables xi and hn are the impulse
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JUNCTION 4 JUNCTION 3JUNCTION 0JUNC
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The only difference is the inclusio
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CO ..............CCýjýCCsC4C4" cj
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Cl [3.....C2 C3CCý3 ý1CS ....ýyC
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6.1 ConclusionsThe work presented i
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a discharge source to the. -winding
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Tests were performed using a single
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1 Thomson, W. T., Deans , N. D., Le
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26 Gallagher, T. J., -andePearmain,
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54 Karkkainen,S. : 'Internal partia
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77 James, R. E., Trick, - F. E., Ph
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104 Weeks, W. T.: 'Multi-conductor
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C ###########*#*#*#*#***#####**#*##
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CC ########*#######################
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c ****###******#****#**#***##*####*
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CC##**#***#*#***#####**######*#####
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ccccc# SEARCH FOR THE NEXT JUNCTION
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CC ##########*#**###*############*#
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C m. ý.C #*#***#*********##*#*#*##
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NUM-0DO 1000 J=1rNFILEWRITE(5.1001)
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MOOAAR TO PRINT SCATTER MATRICIS.EN
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A TECHNIQUE FOR THE LOCATION OF PAR
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Each coil behaves as a multiconduct
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- --T, wýIw. S. - ýfSll- tlýdl.
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John G. Buchan PhD.pdf - OpenAIR @ RGU - Robert Gordon ...

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