| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | Annex ZA (normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 4 Cause and effects of on-line PD <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 5 Noise and disturbances 5.1 General 5.2 Noise and disturbance sources <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 6 Measuring techniques and instruments 6.1 General Figures Figure 1 \u2013 Generic overview of PD measuring system and its subsystems <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 6.2 Pulse propagation in windings 6.3 Signal transfer characteristics Figure 2 \u2013 Cascade of frequency response channels <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Figure 3 \u2013 Idealized frequency response of a PD pulse at the PD source andat the machine terminals; frequency response of different PD measuring systems:a) low frequency range, b) high frequency range, c) very high frequency range <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 6.4 PD sensors 6.4.1 General 6.4.2 Design of PD sensors <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 6.4.3 Reliability of PD sensors 6.5 PD measuring device <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 6.6 PD measuring parameters 6.6.1 General 6.6.2 PD magnitude 6.6.3 Additional PD parameters 7 Installation of measuring systems 7.1 General 7.2 Installation of PD sensors <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 7.3 Outside access point and cabling <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 7.4 Installation of the PD measuring device 7.5 Installation of operational data acquisition systems <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 8 Normalization of measurements 8.1 General 8.2 Normalization for low frequency systems 8.2.1 General 8.2.2 Normalization procedure <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 8.3 Normalization \/ sensitivity check for high and very high frequency systems 8.3.1 Specification for the electronic pulse generation Figure 4 \u2013 Measuring object, during normalization, neutral pointin same condition as during operation <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | Figure 5 \u2013 Arrangement for sensitivity check <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 8.3.2 Configuration of the machine 8.3.3 Sensitivity check 9 Measuring procedures 9.1 General <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 9.2 Machine operating parameters 9.3 Baseline measurement 9.3.1 General 9.3.2 Comprehensive test procedure <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | 9.4 Periodic measurements Figure 6 \u2013 Recommended test procedure with consecutive loadand temperature conditions <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | 9.5 Continuous measurements 10 Visualization of measurements 10.1 General Table 1 \u2013 Operating condition stability to obtain valid trends in PD <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | 10.2 Visualization of trending parameters 10.3 Visualization of PD patterns Figure 7 \u2013 Example of the trend in peak PD activity in three phases overan 18-year interval using periodic measurements <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Figure 8 \u2013 Examples of a PRPD pattern <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Figure 9 \u2013 Phase to phase PD PRPD plots where the PD is caused by insufficient spacing between the endwindings of phases B and C <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | 11 Interpretation of on-line measurements 11.1 General 11.2 Evaluation of basic trend parameters <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | 11.3 Evaluation of PD patterns 11.3.1 General <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | 11.3.2 PD pattern interpretation 11.4 Effect of machine operating factors 11.4.1 General 11.4.2 Machine operating factors <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | 11.4.3 Steady state load conditions 11.4.4 Transient load conditions <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | 12 Test report <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | Annex A (informative)Nature of PD in rotating electrical machines A.1 Types of PD in rotating electrical machines A.1.1 General A.1.2 Internal discharges <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | A.1.3 Slot discharges A.1.4 Discharges in the end-winding A.1.5 Conductive particles A.2 Arcing and sparking A.2.1 General <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | A.2.2 Arcing at broken conductors A.2.3 Vibration sparking <\/td>\n<\/tr>\n | ||||||
| 48<\/td>\n | Annex B (informative)Disturbance rejection and signal separation B.1 General B.2 Frequency domain separation B.3 Time domain separation <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | B.4 Combination of frequency and time domain separation Figure B.1 \u2013 Example for time domain separation by time of pulse arrival <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | B.5 Synchronous multi-channel measurement Figure B.2 \u2013 Combined time and frequency domain disturbance separation(time frequency map) <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | B.6 Signal gating Figure B.3 \u2013 3 phase star diagram of multi-channel measurement <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | B.7 Pattern recognition <\/td>\n<\/tr>\n | ||||||
| 54<\/td>\n | Annex C (informative)Examples of Phase Resolved Partial Discharge (PRPD) pattern C.1 General C.2 Principal appearance of phase resolved PD patterns <\/td>\n<\/tr>\n | ||||||
| 55<\/td>\n | Figure C.1 \u2013 Phase-earth driven PD \u2013 PD predominantly centeredon 45\u00b0 and 225\u00b0 after zero crossing of phase-to-earth voltage <\/td>\n<\/tr>\n | ||||||
| 56<\/td>\n | Figure C.2 \u2013 PD events and other sources, e.g. non-PD sources, that are not centered on 45\u00b0 and 225\u00b0 after zero crossing of phase-to-earth voltage <\/td>\n<\/tr>\n | ||||||
| 57<\/td>\n | C.3 Example of typical PRPD patterns recorded in laboratory C.3.1 General C.3.2 Internal discharges <\/td>\n<\/tr>\n | ||||||
| 58<\/td>\n | Figure C.3 \u2013 Example of internal void discharges PRPD pattern,recorded during laboratory simulation Figure C.4 \u2013 Example of internal delamination PRPD pattern,recorded during laboratory simulation <\/td>\n<\/tr>\n | ||||||
| 59<\/td>\n | C.3.3 Slot partial discharges Figure C.5 \u2013 Example of delamination between conductorand insulation PRPD pattern, recorded during laboratory simulation <\/td>\n<\/tr>\n | ||||||
| 60<\/td>\n | C.3.4 Discharges in the end-winding Figure C.6 \u2013 Slot partial discharges activity and corresponding PRPD pattern,recorded during laboratory simulation Figure C.7 \u2013 Corona activity at the S\/C and stress grading coating,and corresponding PRPD pattern, recorded during laboratory simulation <\/td>\n<\/tr>\n | ||||||
| 61<\/td>\n | Figure C.8 \u2013 Surface tracking activity along the end arm and correspondingPRPD pattern, recorded during laboratory simulation <\/td>\n<\/tr>\n | ||||||
| 62<\/td>\n | Figure C.9 \u2013 Surface discharges at the junction between stress control and conductive slot coatings:a) Insulating tape simulating a bad electrical connection between conductive slot coating and stress control coating and the corresponding PRPD;b) and c) the connection is completely interrupted <\/td>\n<\/tr>\n | ||||||
| 63<\/td>\n | C.4 Example of typical PRPD patterns recorded on-line C.4.1 General C.4.2 Internal discharges Figure C.10 \u2013 Gap type discharge activities and corresponding PRPD patterns,recorded during laboratory simulations <\/td>\n<\/tr>\n | ||||||
| 64<\/td>\n | Figure C.11 \u2013 Example of internal void discharges PRPD pattern,recorded on-line Figure C.12 \u2013 Example of internal delamination PRPD pattern, recorded on-line <\/td>\n<\/tr>\n | ||||||
| 65<\/td>\n | C.4.3 Slot partial discharges Figure C.13 \u2013 Example of delamination between conductor andinsulation PRPD pattern, recorded on-line <\/td>\n<\/tr>\n | ||||||
| 66<\/td>\n | C.4.4 Discharges in the end-winding Figure C.14 \u2013 PD pattern of phase 2 recorded on-line in April 2012without any filtering indicating slot PD Figure C.15 \u2013 Picture of a bar removed for expertise chosen to be the one with the highest level on phase 2 and close to line side when scanning slots using the TVA probe in January 2014 Figure C.16 \u2013 PD pattern recorded on-line on phase 2 in September 2016 (maximum scale is 1 V) <\/td>\n<\/tr>\n | ||||||
| 67<\/td>\n | Figure C.17 \u2013 PRPD plot and photo of a stator bar in the same phase of a large aircooled turbine generator showing signs of deterioration of the slot conductive coating, as well deterioration of the interface between the slot conductive coating and the stress control coating Figure C.18 \u2013 Surface tracking activity along the end arm andcorresponding PRPD pattern, recorded on-line <\/td>\n<\/tr>\n | ||||||
| 68<\/td>\n | Figure C.19 \u2013 Degradation caused by gap type dischargesand corresponding PRPD patterns, recorded on-line <\/td>\n<\/tr>\n | ||||||
| 69<\/td>\n | C.5 Other complex examples Figure C.20 \u2013 PRPD pattern recorded on-line, illustratingmultiple PD sources showing the complexity <\/td>\n<\/tr>\n | ||||||
| 70<\/td>\n | Figure C.21 \u2013 Three phase PRPD showing phase to phase PD between A and B phases as well as B and C phases; photo showing the as-found PD in the endwinding area due to inadequate separation between the phases <\/td>\n<\/tr>\n | ||||||
| 71<\/td>\n | Annex D (normative)Specifications for conventional PD coupling capacitors D.1 General D.2 Datasheet information D.3 Type tests D.3.1 General D.3.2 Voltage endurance <\/td>\n<\/tr>\n | ||||||
| 72<\/td>\n | D.3.3 Tracking resistance D.3.4 Lightning impulse test D.3.5 Dissipation factor D.3.6 Capacitance stability in temperature D.3.7 Thermal cycling D.3.8 Frequency response D.4 Mechanical vibration and shock capabilities <\/td>\n<\/tr>\n | ||||||
| 73<\/td>\n | D.5 Routine tests D.5.1 General D.5.2 Dielectric withstand test at power frequency D.5.3 Partial discharge extinction voltage test D.5.4 Capacitance and dissipation factor <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Rotating electrical machines – On-line partial discharge measurements on the stator winding insulation<\/b><\/p>\n |