Summary
Partial discharge (PD) is a local discharge that only partially bridges the insulation between conductors. Presence of PD is often implies on existence of defect in insulation system of high voltage equipment e.g. High Voltage Generators. Moreover, PD itself can accelerate degradation of stator bar insulation. Thus, measurement of PD signals which often initiate long before the total breakdown of insulation system could increase the reliability of High Voltage apparatus: nowadays utilization of various PD patterns in high voltage Generators are a significant tool for diagnosing generators. Using these patterns one can distinguish the type of defect e.g., slot discharge, internal discharge or PD originated of end windings. The problem is that these PD patterns altered by temperature as well as by vibration which itself is depend on the level of generator loading. How these changes which are made to patterns and causes some ambiguity to diagnose the type of defect can be compensated or removed from PD patterns is the question that will be investigated and answered in this contribution. Also some case studies related to the above subject will be presented and the diagnosing procedure is reported in this paper.
Additional informations
| Publication type | ISH Collection |
|---|---|
| Reference | ISH2017_388 |
| Publication year | |
| Publisher | ISH |
| File size | 3 MB |
| Pages number | 6 |
| Price for non member | Free |
| Price for member | Free |
Authors
EL-SAYED ALY, Detlev Gross, ROUDÉN
