Performance evaluation of PD monitoring technique integrated into medium voltage cable network for smart condition assessment

Online condition assessment of medium voltage (MV) cables is a valuable tool to reduce the probability of forced outages in the distribution network. Partial discharge (PD) diagnostics is being used as an efficient methodology to predict the deteriorating insulation of the power components. In this paper a comprehensive condition assessment solution is proposed for cable networks. Low cost non-intrusive devices are installed at each critical location in such a way as to monitor the entire feeder. The Direction of arrival (DOA) technique is used to monitor the PD activity. The idea of a data-base is developed to process the PD data captured by sensors distributed along the cable feeder. The performance of integrated sensors is evaluated using ATP-EMTP simulation. The proposed system can be used for both continuous and periodic monitoring. However in order to overcome the limitations of the conventional periodic and continuous monitoring, a hybrid monitoring system is proposed to be applied for the real networks.

[1]  M. Lehtonen,et al.  Parameters Identification and Modeling of High-Frequency Current Transducer for Partial Discharge Measurements , 2013, IEEE Sensors Journal.

[2]  A. Golubev,et al.  Advantages of continuous monitoring of partial discharges in rotating equipment and switchgear , 2003, Conference Record of the 2003 Annual Pulp and Paper Industry Technical Conference, 2003..

[3]  H. L. Willis,et al.  Assessing the reliability of distribution systems , 2001 .

[4]  M. Lehtonen,et al.  Online partial discharge diagnostics in medium voltage branched cable networks , 2013, 4th International Conference on Power Engineering, Energy and Electrical Drives.

[5]  R. S. Nema,et al.  Characterisation of partial discharge pulses in artificial voids in polypropylene films used in capacitors , 1996, Conference Record of the 1996 IEEE International Symposium on Electrical Insulation.

[6]  Edward Gulski,et al.  SENSORS AND SENSING USED FOR NON-CONVENTIONAL PD DETECTION , 2006 .

[7]  Valeriy Vyatkin,et al.  Distributed Power System Automation With IEC 61850, IEC 61499, and Intelligent Control , 2011, IEEE Transactions on Systems, Man, and Cybernetics, Part C (Applications and Reviews).

[8]  Salman Mohagheghi,et al.  Applications of IEC 61850 in distribution automation , 2011, 2011 IEEE/PES Power Systems Conference and Exposition.

[9]  M. Lehtonen,et al.  A wireless sensor concept for managing electrical distribution networks , 2004, IEEE PES Power Systems Conference and Exposition, 2004..

[10]  A. Pedersen,et al.  The theory and measurement of partial discharge transients , 1991 .

[11]  Nagy I. Elkalashy,et al.  Partial discharge diagnostic system for smart distribution networks using directionally calibrated induction sensors , 2015 .