Application of HFCT and UHF Sensors in On-Line Partial Discharge Measurements for Insulation Diagnosis of High Voltage Equipment

Partial discharge (PD) measurements provide valuable information for assessing the condition of high voltage (HV) insulation systems, contributing to their quality assurance. Different PD measuring techniques have been developed in the last years specially designed to perform on-line measurements. Non-conventional PD methods operating in high frequency bands are usually used when this type of tests are carried out. In PD measurements the signal acquisition, the subsequent signal processing and the capability to obtain an accurate diagnosis are conditioned by the selection of a suitable detection technique and by the implementation of effective signal processing tools. This paper proposes an optimized electromagnetic detection method based on the combined use of wideband PD sensors for measurements performed in the HF and UHF frequency ranges, together with the implementation of powerful processing tools. The effectiveness of the measuring techniques proposed is demonstrated through an example, where several PD sources are measured simultaneously in a HV installation consisting of a cable system connected by a plug-in terminal to a gas insulated substation (GIS) compartment.

[1]  Gian Carlo Montanari,et al.  A new approach to the diagnosis of solid insulation systems based on PD signal inference , 2003 .

[2]  J. Watkins,et al.  Circular resonant structures in microstrip , 1969 .

[3]  Abderrahmane Haddad,et al.  Advances in High Voltage Engineering , 2004 .

[4]  K.R. Farmer,et al.  Acousto-optical PD detection for transformers , 2006, IEEE Transactions on Power Delivery.

[5]  Xiandong Ma,et al.  Automated wavelet selection and thresholding for PD detection , 2002 .

[6]  S. Okabe,et al.  Electromagnetic (EM) wave characteristics in GIS and measuring the EM wave leakage at the spacer aperture for partial discharge diagnosis , 2007, IEEE Transactions on Dielectrics and Electrical Insulation.

[7]  S. Long,et al.  Resonant frequency of a circular disc, printed-circuit antenna , 1977 .

[8]  Hitoshi Okubo,et al.  A Novel Technique for Detecting Electromagnetic Waves Caused by Partial Discharge in GIS , 2001 .

[9]  G.C. Stone,et al.  Partial discharge. VII. Practical techniques for measuring PD in operating equipment , 1991, IEEE Electrical Insulation Magazine.

[10]  E. Gulski,et al.  Classification of partial discharges , 1993 .

[11]  Xiaohua Wang,et al.  Development simulation and experiment study on UHF Partial Discharge Sensor in GIS , 2012, IEEE Transactions on Dielectrics and Electrical Insulation.

[12]  Masayoshi Tanaka,et al.  Electromagnetic waves from partial discharges and their detection using patch antenna , 2010, IEEE Transactions on Dielectrics and Electrical Insulation.

[13]  Chunxu Wu,et al.  A Fiber Optic PD Sensor Using a Balanced Sagnac Interferometer and an EDFA-Based DOP Tunable Fiber Ring Laser , 2014, Sensors.

[14]  M.D. Judd,et al.  Partial discharge monitoring of power transformers using UHF sensors. Part I: sensors and signal interpretation , 2005, IEEE Electrical Insulation Magazine.

[15]  John J. Soraghan,et al.  Detection of PD utilizing digital signal processing methods. Part 3: Open-loop noise reduction , 2001 .

[16]  K. Raja,et al.  Recognition of discharge sources using UHF PD signatures , 2002 .

[17]  P. Lewin,et al.  Comparison of on-line partial discharge detection methods for HV cable joints , 2002 .

[18]  E.W. Shu,et al.  Dispersion and PD detection in shielded power cable [Feature article] , 2008, IEEE Electrical Insulation Magazine.

[19]  M.D. Judd,et al.  Partial discharge monitoring for power transformer using UHF sensors. Part 2: field experience , 2005, IEEE Electrical Insulation Magazine.

[20]  H. S. Wolff,et al.  iRun: Horizontal and Vertical Shape of a Region-Based Graph Compression , 2022, Sensors.

[21]  Meijer,et al.  Pattern Analysis of Partial Discharges in SFG CIS , 2004 .

[22]  Martin D. Judd,et al.  Partial discharge current pulses in SF6 and the effect of superposition of their radiometric measurement , 2006 .

[23]  E. Gulski,et al.  Pattern analysis of partial discharges in SF/sub 6/ GIS , 1998 .

[24]  R. Bodega,et al.  On-site testing and PD diagnosis of high voltage power cables , 2008, IEEE Transactions on Dielectrics and Electrical Insulation.

[25]  Jitka Fuhr.  Procedure for identification and localization of dangerous PD sources in power transformers , 2005, IEEE Transactions on Dielectrics and Electrical Insulation.

[26]  J. Lopez-Roldan,et al.  Optimisation of a sensor for onsite detection of partial discharges in power transformers by the UHF method , 2008, IEEE Transactions on Dielectrics and Electrical Insulation.

[27]  S. Meijer,et al.  Partial Discharge Diagnosis of High-Voltage Gas-Insulated Systems , 2001 .

[28]  Shen Zhang,et al.  Study of GIS Partial Discharge On-line Monitoring Using UHF Method , 2010, 2010 International Conference on Electrical and Control Engineering.

[29]  A. Rodrigo,et al.  Influence of high frequency current transformers bandwidth on charge evaluation in partial discharge measurements , 2011, IEEE Transactions on Dielectrics and Electrical Insulation.

[30]  A. Rodrigo,et al.  Study of partial discharge charge evaluation and the associated uncertainty by means of high frequency current transformers , 2012, IEEE Transactions on Dielectrics and Electrical Insulation.

[31]  G. Robles,et al.  Partial discharge and noise separation by means of spectral-power clustering techniques , 2013, IEEE Transactions on Dielectrics and Electrical Insulation.

[32]  S. Tumański.  Induction coil sensors—a review , 2007 .

[33]  Julio E. Posada-Roman,et al.  Fiber Optic Sensor for Acoustic Detection of Partial Discharges in Oil-Paper Insulated Electrical Systems , 2012, Sensors.

[34]  Stuart A. Long,et al.  Theory of the circular-disc printed-circuit antenna , 1978 .

[35]  Guillermo Robles,et al.  Inductive Sensor Performance in Partial Discharges and Noise Separation by Means of Spectral Power Ratios , 2014, Sensors.

[36]  [EPUB] Ieee Guide For Partial Discharge Testing Of Shielded Power , 2007 .

[37]  H. Muto,et al.  Detecting characteristics of various type antennas on partial discharge electromagnetic wave radiating through insulating spacer in gas insulated switchgear , 2009, IEEE Transactions on Dielectrics and Electrical Insulation.

[38]  Martin D. Judd,et al.  Broadband couplers for UHF detection of partial discharge in gas-insulated substations , 1995 .