A new technique for the remote partial discharge monitoring of the stator insulation of high-voltage motors located in &amp;amp;#x201C;Ex&amp;amp;#x201D; (hazardous) locations

Renforth, Lee; Armstrong, Russell; Clark, David E.; Goodfellow, Steven; Hamer, P.S.

doi:10.1109/pcicon.2012.6549674

Cited by 15 publications

(11 citation statements)

References 4 publications

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“…The HVCC sensor is the most widely applied sensor (to date) for rotating HV machine stator winding CM and has now become the standard for large HV generators (RC sensors are still used for smaller sub-50-MW generators). Frequency response comparison testing between the three main sensors, as reported in [1], has shown that (at 10 MHz) the RC sensor is the least sensitive of the three sensors (at a relative sensitivity of one), followed by the HFCT sensor (at a relative sensitivity of 30), and then the HVCC sensor (the most sensitive at a relative sensitivity of 100, 100 times that of the RC sensor). The most suitable sensor solution for any application will depend on the type of cable/plant/machine used and the cable earthing configuration employed.…”

Section: Olpd Sensor Options For Rotating Hv Machinesmentioning

confidence: 98%

Continuous Remote Online Partial Discharge Monitoring of HV Ex/ATEX Motors in the Oil and Gas Industry

Renforth

Hamer

Clark

et al. 2015

IEEE Trans. on Ind. Applicat.

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This paper presents results from the continued application of a new technique for the remote online 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 highcurrent wideband high-frequency current transformer sensors located remotely from the motor under test, at the switchboard end of the HV feeder cable. Significant cost and operational benefits can be gained from this remote monitoring technique as the stator winding condition of these motors can be monitored without having to enter the hazardous gas (Ex/ATEX) zone. The work described in this paper is a continuation of that carried out by the same authors, as reported at the 2012 IEEE Petroleum and Chemical Industry Technical Conference, and includes the development of proposed condition guidelines for assessing the condition of the stator winding insulation systems of large populations of aged HV motors, based on an OLPD "league-table" database. Two case studies are presented wherein the HV stator insulation condition and reliability of in-service motors, operating in hazardous gas zones, and HV generators were assessed using both online and offline partial discharge (PD) testing and monitoring techniques. The case studies emphasize the importance of carrying out 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 can support reliability-centered maintenance and condition-based management regimes.Index Terms-Condition-based management (CBM), explosive atmosphere (Ex) and atmosphere-explosive (ATEX) motors, hazardous gas zones, online partial discharge (OLPD), partial discharge (PD), PD diagnostics, phase-resolved PD, rotating high-voltage (HV) machines.

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Section: Olpd Sensor Options For Rotating Hv Machinesmentioning

confidence: 98%

Continuous Remote Online Partial Discharge Monitoring of HV Ex/ATEX Motors in the Oil and Gas Industry

Renforth

Hamer

Clark

et al. 2015

IEEE Trans. on Ind. Applicat.

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“…ote OLPD monitoring, as cy response of the HFCT 00 kHz) it is possible to witchboard) end of the HV e rotating machine at the made possible with the combination of the technique of PD pulse wave-shape analysis [1] and the good low frequency response of the high-current HFCT sensor, enabling the detection of the attenuated, lower frequency PD pulses that have travelled down the HV cable from the machine's stator windings.…”

Section: On-line Partial Discharge Options For Rotating Hv Mmentioning

confidence: 99%

“…This is related to the different values of relative permittivity of the dielectrics ( used in the different cable types and the geometry/dimensions of the cable. On-line PD measurements on XLPE cables (in the voltage range 3.3 -15 kV) have been shown to have an effective measurement range for the HFCT sensors of up to 2.5 km/1.5 miles from the rotating machine under test [1], as illustrated below in Fig. 5.…”

Section: On-line Partial Discharge Options For Rotating Hv Mmentioning

confidence: 99%

“…A review of published papers on the measurement and analysis of OLPD severity in rotating HV machines by the authors [1] has shown that the most effective way to measure the severity of any PD activity is to use a combination of three measurements:…”

Section: Peak Pd Level and Pd Activity Guidelines For Rotating Hvmentioning

confidence: 99%

“…However, as most of the HV motors at the facility are located in hazardous gas zones, an alternative PD monitoring solution was sought for the OLPD monitoring of these motors. A solution using wideband, permanent HFCT PD sensors located at the switchgear end of the HV cable feeder to monitor the PD activity in the Ex motor stator windings was successfully developed and reported in the IEEE-PCIC 2012 paper presented by the authors [1]. Further to the success of the remote OLPD monitoring trial a new project was initiated in 2012, whereby permanent, remote OLPD monitoring systems (using HFCT sensors mounted at the switchgear end of the 10 kV motor feeder circuits, as shown previously in Fig.…”

Section: Case Study 1 -Olpd Monitoringmentioning

confidence: 99%

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Continuous, remote on-line partial discharge (OLPD) monitoring of HV EX/ATEX motors in the oil and gas industry

Renforth

Hamer

Clark

et al. 2013

Industry Applications Society 60th Annual Petroleum and Chemical Industry Conference

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This paper presents results from the continued application of a new technique for the remote, on-line partial discharge (OLPD) testing and monitoring of in-service, high voltage (HV) Ex/Atex motors operating in hazardous gas zones. The technique employs high current, wideband, high frequency current transformer (HFCT) sensors located remotely from the motor under test, at the switchboard end of the HV feeder cable. Significant cost and operational benefits can be gained from this remote monitoring technique as the stator winding condition of these motors can be monitored without having to enter the hazardous gas (Ex/Atex) zone. The work described in this paper is a continuation of that carried out by the same authors, as reported at the IEEE-PCIC 2012 conference, and includes the development of proposed condition guidelines for assessing the condition of the stator winding insulation systems of large populations of aged HV motors, based on an on-line partial discharge (OLPD) 'league table' database. Two case studies are presented wherein the HV stator insulation condition and reliability of in-service motors, operating in a hazardous gas zones, and HV generators were assessed using both on-line and off-line partial discharge testing and monitoring techniques. The case studies emphasize the importance of carrying out extended, continuous on-line partial discharge monitoring of in-service rotating HV machines to detect underlying trends in partial discharge activity over time. The paper concludes with how condition monitoring data can support reliability centered maintenance and condition-based management regimes.

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A New Proposed Method for Interpretation On-line Partial Discharge Measurements Data of Turbine Generator

Baboraik

Usachev

Ali

2020

J. Electr. Eng. Technol.

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A new technique for the remote partial discharge monitoring of the stator insulation of high-voltage motors located in &#x201C;Ex&#x201D; (hazardous) locations

Cited by 15 publications

References 4 publications

Continuous Remote Online Partial Discharge Monitoring of HV Ex/ATEX Motors in the Oil and Gas Industry

Continuous Remote Online Partial Discharge Monitoring of HV Ex/ATEX Motors in the Oil and Gas Industry

Continuous, remote on-line partial discharge (OLPD) monitoring of HV EX/ATEX motors in the oil and gas industry

A New Proposed Method for Interpretation On-line Partial Discharge Measurements Data of Turbine Generator

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