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PD Measurement of Rotating Machine for Condition Monitoring Prasad Sanjay K1, Bhonslay Chhaya R1 1The Tata Power Company Limited, Mumbai Online Published on 12 May, 2022. Abstract A Generator in power system is an extremely critical equipment and availability of this to be maintained at highest reliability. Online PD measurement of rotating machine is a good and evolving condition monitoring technique apart from well establish offline testing technique. This paper discusses the results of online PD measurements done on Hydro Generators, with different type of coupling capacitors (80 pF & 2 nF). PD measured in absolute values pC (Pico- coulombs) and analysis of PRPD are also briefed for results. Cases of failure of two other thermal VPI generator are discussed. Case studies about failure of air-cooled generator were discussed, with detail reason and corrective action. PD confirmation by capacitance and Tan Delta Measurement of rotating machines was also explored in this paper. Top Keywords Partial Discharge (PD), Phase Resolved Partial Discharge (PRPD), VPI (Vacuum Pressure Impregnation), Coupling Capacitor (CC), Bus Coupler Matching Unit (BCMU). Top | | |
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