Modeling and experimental verification of on-line PD detection in MV covered-conductor overhead networks

The falling trees on covered-conductor (CC) overhead distribution lines produce partial discharges (PDs). The measurements have been taken in the laboratory and PD signal characteristics under various circumstances have been described. In this paper, an on-line single-phase PD monitoring system using Rogowski coil is simulated in EMTP-ATP. The simulation results are compared with those obtained from the laboratory measurements. The proposed model can be used to estimate the length of the practical CC lines at which PDs due to falling trees can be detected and localized; thus, deciding the number and positioning of the sensors over a particular length of the CC lines. The different noise sources have been described that cause interference with low level PD signals, which is a major challenge for on-line/on-site condition monitoring. The design aspects of the wireless sensor for this specific application are also discussed. Automatic detection of falling trees will reduce visual inspection work after storms and it will improve reliability and safety of the CC distribution system.

[1]  Matti Lehtonen,et al.  MODELING OF ROGOWSKI COIL FOR ON-LINE PD MONITORING IN COVERED- CONDUCTOR OVERHEAD DISTRIBUTION NETWORKS , 2007 .

[2]  Lj. A. Kojovic.  Rogowski Coil Transient Performance and ATP Simulations for Applications in Protective Relaying , 2005 .

[3]  Johan J. Smit,et al.  Insulation condition assessment of medium voltage power cables using on-site pd detection and analysis techniques , 2001 .

[4]  D. A. Ward,et al.  Experience with using Rogowski coils for transient measurements , 1992 .

[5]  Ghulam Murtaza Hashmi,et al.  Partial discharge detection for condition monitoring of covered-conductor overhead distribution networks using Rogowski coil , 2008 .

[6]  G. Stone,et al.  Fundamental Limitations in the Measurement of Corona and Partial Discharge , 1982, IEEE Transactions on Electrical Insulation.

[7]  S. Guttowski,et al.  Design and evaluation of an active ripple filter with Rogowski-coil current sensing , 1999, 30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321).

[8]  T. Brooks.  Wireless technology for industrial sensor and control networks , 2001, SIcon/01. Sensors for Industry Conference. Proceedings of the First ISA/IEEE. Sensors for Industry Conference (Cat. No.01EX459).

[9]  C. Kane,et al.  Practical experiences of on-line partial discharge measurements on a variety of medium voltage electrical equipment , 1998, Record of Conference Papers. IEEE Industry Applications Society 45th Annual Petroleum and Chemical Industry Conference (Cat. No.98CH36234).

[10]  Ye Miaoyuan,et al.  Improved performance Rogowski coils for power system , 2003, 2003 IEEE PES Transmission and Distribution Conference and Exposition (IEEE Cat. No.03CH37495).

[11]  M. Lehtonen,et al.  Covered-Conductor Overhead Distribution Line Modeling and Experimental Verification for Determining its Line Characteristics , 2007, 2007 IEEE Power Engineering Society Conference and Exposition in Africa - PowerAfrica.

[12]  Matti Lehtonen,et al.  A partial discharge detection concept for wireless sensors in covered conductor distribution system , 2006 .

[13]  G. C. Stone.  The Use of Partial Discharge! Measurements to Assess the Condition of Rotating Machine , 1996 .

[14]  Matti Lehtonen,et al.  Effects of Rogowski Coil and Covered-Conductor Parameters on the Performance of PD Measurements in Overhead Distribution Networks , 2008 .

[15]  H. Takehana,et al.  New partial discharge detection method for live power cable systems , 1991, [1991] Proceedings of the 3rd International Conference on Properties and Applications of Dielectric Materials.

[16]  L. Kojovic,et al.  Rogowski coils suit relay protection and measurement ~of power systems\ , 1997 .

[17]  Raj Aggarwal,et al.  Radio frequency measurement of different discharges , 2003, 2003 IEEE Bologna Power Tech Conference Proceedings,.

[18]  B. I. Gururaj,et al.  Evaluation of digital filters for rejecting discrete spectral interference in on-site PD measurements , 1993 .

[19]  S. A. Boggs,et al.  Propagation of partial discharge pulses in shielded power cable , 1982, Conference on Electrical Insulation & Dielectric Phenomena - Annual Report 1982.

[20]  G. Scheible,et al.  Novel wireless power supply system for wireless communication devices in industrial automation systems , 2002, IEEE 2002 28th Annual Conference of the Industrial Electronics Society. IECON 02.

[21]  W. F. Ray,et al.  High performance Rogowski current transducers , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[22]  Matti Lehtonen,et al.  Voltage Sag Characteristics of Covered Conductor Feeders , 2003 .

[23]  P.A.A.F. Wouters,et al.  Synchronization of on-line PD detection and localization setups using pulse injection , 2003, Proceedings of the 7th International Conference on Properties and Applications of Dielectric Materials (Cat. No.03CH37417).

[24]  M. Argüeso,et al.  Implementation of a Rogowski coil for the measurement of partial discharges , 2005 .

[25]  D. A. Ward,et al.  Using Rogowski coils for transient current measurements , 1993 .

[26]  H. Maekawa,et al.  GIS monitoring sensors , 1997 .

[27]  Matti Lehtonen,et al.  Application of wavelet transform to de-noise partial discharge signals in covered-conductor distribution networks , 2006 .

[28]  Philip J. Moore,et al.  A nonintrusive partial discharge measurement system based on RF technology , 2003, 2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491).

[29]  Matti Lehtonen,et al.  Wavelet-based de-noising of partial discharge signals in MV covered-conductor networks , 2006 .

[30]  Pertti Pakonen.  Detection of Incipient Tree Faults on High Voltage Covered Conductor Lines , 2007 .

[31]  Xiandong Ma,et al.  Interpretation of wavelet analysis and its application in partial discharge detection , 2002 .

[32]  C. Zhou,et al.  An improved methodology for application of wavelet transform to partial discharge measurement denoising , 2005, IEEE Transactions on Dielectrics and Electrical Insulation.

[33]  L. Satish,et al.  Wavelet-based denoising of partial discharge signals buried in excessive noise and interference , 2003 .

[34]  P.A.A.F. Wouters,et al.  Sensors for on-line PD detection in MV power cables and their locations in substations , 2003, Proceedings of the 7th International Conference on Properties and Applications of Dielectric Materials (Cat. No.03CH37417).

[35]  M. Lehtonen,et al.  On-line PD measuring system modeling and experimental verification for covered-conductor overhead distribution lines , 2007, 2007 Mediterranean Conference on Control & Automation.

[36]  Mikael Nordman,et al.  An architecture for wireless sensors in distributed management of electrical distribution systems , 2004 .