PROJECT TITLE :
Continuous Remote Online Partial Discharge Monitoring of HV Ex/ATEX Motors in the Oil and Gas Industry
This paper presents results from the continued application of a brand new technique for the remote on-line partial discharge (OLPD) testing and monitoring of in-service high-voltage (HV) explosive atmosphere (Ex)/atmosphere-explosive (ATEX) motors operating in hazardous gas zones. The technique employs high-current wideband high-frequency current transformer sensors located remotely from the motor underneath take a look at, at the switchboard finish of the HV feeder cable. Significant value and operational advantages can be gained from this remote monitoring technique as the stator winding condition of those motors will be monitored without having to enter the hazardous gas (Ex/ATEX) zone. The work described during this paper could be a continuation of that administrated by the identical authors, as reported at the 2012 IEEE Petroleum and Chemical Business Technical Conference, and includes the event of proposed condition tips for assessing the condition of the stator winding insulation systems of large populations of aged HV motors, primarily based on an OLPD “league-table” database. 2 case studies are presented whereby the HV stator insulation condition and reliability of in-service motors, operating in hazardous gas zones, and HV generators were assessed using each online and offline partial discharge (PD) testing and monitoring techniques. The case studies emphasize the importance of finishing up extended continuous OLPD monitoring of in-service rotating HV machines to detect underlying trends in PD activity over time. This paper concludes with how condition monitoring data will support reliability-focused maintenance and condition-primarily based management regimes.
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