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The authors present a novel on-line partial discharge (OLPD) high voltage (HV) insulation condition monitoring (CM) solution for complete HV network monitoring of petrochemical refining facilities. Continuous, (24/7) OLPD insulation monitoring of the HV insulation condition of cables, switchgear, transformers and rotating machines (operating at 3000 V and above) provides operators with an early warning...
Partial discharges proved to be important diagnostic parameter during technical lifetime of operated electrical machines. Until now PD phenomena was well described and understood in technical society, especially for characteristic arrangement, e.g. corona, tip to plane, sphere to plane, and others. Most of the studies were done under AC voltage. However as DC transmission is concerned, more attention...
Gaseous cavities within the insulating materials during manufacturing are potential sources of electrical trees which can lead to continuous degradation and breakdown of materials due to Partial Discharges (PD). To determine the suitability of use and to acquire the data for the dimensioning of electrical insulation systems breakdown voltage of insulators should be determined. In this paper, an Adaptive...
Partial discharge (PD) is one of the main causes for eventual equipment failure and it occurs where the electric field exceeds the local dielectric strength of the insulation. The PD signal captured at UHF has many advantages. The finite difference time domain (FDTD) technique, which is a widely used electromagnetic computational method, has been used to model propagation PD discharges generated in...
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