Partial Discharge Detection in High-Voltage Equipment 0408020636, 9780408020633
481 78 96MB
English Pages [202] Year 1989
Table of contents :
Introduction
Contents
1. Occurrence of Discharges
1.1 Partial discharges
1.2 Inception of internal discharges
1.3 Inception of surface discharges
1.4 Inception of corona discharges
1.5 Discharges by electrical treeing
References
2. Recurrence of Discharges
2.1 Discharges at AC voltage
2.2 Corona discharges
2.3 Discharges (other than corona) at DC voltage
2.4 Discharges at impulse voltage
References
3. Magnitude of Discharges
3.1 The object of discharge detection
3.2 Quantities related to magnitude of discharges
3.3 Choice of q as a measure for discharges
4. Nonelectrical Discharge Detection
4.1 Introduction
4.2 Noise detection in air
4.3 Noise detection in oil-insulated installations
4.4 Light detection
References
5. Principles of Electrical Discharge Detection
5.1 The basic diagram
5.2 Amplification of impulses
5.3 Sensitivity
5.4 Resolution
5.5 Observation
References
6. Actual Detection Circuits
6.1 Straight detection
6.2 Balanced detection
6.3 Calibrators
6.4 Interference
6.5 The choice between straight and balanced detection
6.6 Common mode rejection
References
7. Location
7.1 Introduction
7.2 Nonelectric location
7.3 Location by separation of electrodes
7.4 Location with electrical probes
7.5 Location in cables by travelling waves
7.6 Location by travelling waves (short cables and switchgear)
References
8. Evaluation of Discharges
8.1 Introduction
8.2 Recognition
8.3 Mechanisms of deterioration
8.4 Evaluation
8.5 Specifications
References
9. Detection in the Actual Specimen
9.1 Introduction
9.2 Capacitors
9.3 Cables
9.4 Bushings
9.5 Transformers
9.6 Machine insulation
9.7 Gas-insulated switchgear
9.8 Survey
References
Appendix 1: Terminology
A1.1 Terms relating to discharges
A1.2 Terms relating to detectors
A1.3 Preferred symbols
Appendix 2
Index
Introduction
Contents
1. Occurrence of Discharges
1.1 Partial discharges
1.2 Inception of internal discharges
1.3 Inception of surface discharges
1.4 Inception of corona discharges
1.5 Discharges by electrical treeing
References
2. Recurrence of Discharges
2.1 Discharges at AC voltage
2.2 Corona discharges
2.3 Discharges (other than corona) at DC voltage
2.4 Discharges at impulse voltage
References
3. Magnitude of Discharges
3.1 The object of discharge detection
3.2 Quantities related to magnitude of discharges
3.3 Choice of q as a measure for discharges
4. Nonelectrical Discharge Detection
4.1 Introduction
4.2 Noise detection in air
4.3 Noise detection in oil-insulated installations
4.4 Light detection
References
5. Principles of Electrical Discharge Detection
5.1 The basic diagram
5.2 Amplification of impulses
5.3 Sensitivity
5.4 Resolution
5.5 Observation
References
6. Actual Detection Circuits
6.1 Straight detection
6.2 Balanced detection
6.3 Calibrators
6.4 Interference
6.5 The choice between straight and balanced detection
6.6 Common mode rejection
References
7. Location
7.1 Introduction
7.2 Nonelectric location
7.3 Location by separation of electrodes
7.4 Location with electrical probes
7.5 Location in cables by travelling waves
7.6 Location by travelling waves (short cables and switchgear)
References
8. Evaluation of Discharges
8.1 Introduction
8.2 Recognition
8.3 Mechanisms of deterioration
8.4 Evaluation
8.5 Specifications
References
9. Detection in the Actual Specimen
9.1 Introduction
9.2 Capacitors
9.3 Cables
9.4 Bushings
9.5 Transformers
9.6 Machine insulation
9.7 Gas-insulated switchgear
9.8 Survey
References
Appendix 1: Terminology
A1.1 Terms relating to discharges
A1.2 Terms relating to detectors
A1.3 Preferred symbols
Appendix 2
Index
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