{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,11]],"date-time":"2026-04-11T13:20:51Z","timestamp":1775913651878,"version":"3.50.1"},"reference-count":29,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2018,2,6]],"date-time":"2018-02-06T00:00:00Z","timestamp":1517875200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The most common cause of high voltage electric machine malfunction is an electrical failure of the insulation system due to extreme partial discharges activity. The paper discusses the methodology for the construction of a low-pass high voltage filter for partial discharge measurement. It focuses mainly on the shape optimization, using an analytical approach with subsequent verification using the finite element method. The experimental verification is given together with important conclusions.<\/jats:p>","DOI":"10.3390\/s18020482","type":"journal-article","created":{"date-parts":[[2018,2,6]],"date-time":"2018-02-06T15:18:05Z","timestamp":1517930285000},"page":"482","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Low-Pass Filter for HV Partial Discharge Testing"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2378-8059","authenticated-orcid":false,"given":"Vladimir","family":"Kindl","sequence":"first","affiliation":[{"name":"University of West Bohemia, Faculty of Electrical Engineering, Regional Innovation Centre for Electrical Engineering (RICE), Univerzitni 8, 301 00 Pilsen, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bohumil","family":"Skala","sequence":"additional","affiliation":[{"name":"University of West Bohemia, Faculty of Electrical Engineering, Regional Innovation Centre for Electrical Engineering (RICE), Univerzitni 8, 301 00 Pilsen, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6089-3478","authenticated-orcid":false,"given":"Roman","family":"Pechanek","sequence":"additional","affiliation":[{"name":"University of West Bohemia, Faculty of Electrical Engineering, Regional Innovation Centre for Electrical Engineering (RICE), Univerzitni 8, 301 00 Pilsen, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4751-7272","authenticated-orcid":false,"given":"Vaclav","family":"Kus","sequence":"additional","affiliation":[{"name":"University of West Bohemia, Faculty of Electrical Engineering, Regional Innovation Centre for Electrical Engineering (RICE), Univerzitni 8, 301 00 Pilsen, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7237-4093","authenticated-orcid":false,"given":"Jaroslav","family":"Hornak","sequence":"additional","affiliation":[{"name":"University of West Bohemia, Faculty of Electrical Engineering, Regional Innovation Centre for Electrical Engineering (RICE), Univerzitni 8, 301 00 Pilsen, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2018,2,6]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Stone, G.C., Boulter, E.A., Culbert, I., and Dhirani, H. (2004). Electrical Insulation for Rotating Machines: Design, Evaluation, Aging, Testing, and Repair, IEEE Press.","DOI":"10.1002\/047168290X"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"560","DOI":"10.1109\/TDEI.2009.4815192","article-title":"Cross-sectional comparison of insulation degradation mechanisms and lifetime evaluation of power transmission equipment","volume":"16","author":"Shirasaka","year":"2009","journal-title":"IEEE Trans. Dielectr. Electr. Insul."},{"key":"ref_3","unstructured":"Goudie, J.L., Owen, M.J., and Orbeck, T. (1998, January 25\u201328). A review of possible degradation mechanisms of silicone elastomers in high voltage insulation applications. Proceedings of the 1998 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, Atlanta, GA, USA, USA."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Florkowska, B., Florkowski, M., and Zydron, P. (2007, January 8\u201313). The Role of Harmonic Components on Partial Discharge Mechanism and Degradation Processes in Epoxy Resin Insulation. Proceedings of the IEEE International Conference on Solid Dielectrics (ICSD\u201907), Winchester, UK.","DOI":"10.1109\/ICSD.2007.4290875"},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Luo, Y., Li, Z., and Wang, H. (2017). A Review of Online Partial Discharge Measurement of Large Generators. Energies, 10.","DOI":"10.3390\/en10111694"},{"key":"ref_6","unstructured":"International Council on Large Electric Systems (CIGRE) (2009). CIGRE WG A1.10. Survey of Hydrogenerator Failures, CIGRE. Cigre Report 392."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"5","DOI":"10.1109\/MEI.2005.1513425","article-title":"Partial discharge and dissipation factor behavior of model insulating systems for high voltage rotating machines under different stresses","volume":"21","author":"Farahani","year":"2005","journal-title":"IEEE Electr. Insul. Mag."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"1998","DOI":"10.1109\/T-AIEE.1951.5060664","article-title":"Detection of slot discharges in high-voltage stator windings during operation","volume":"70","author":"Johnson","year":"1951","journal-title":"Trans. Am. Inst. Electr. Eng."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"8","DOI":"10.1109\/MEI.2012.6268437","article-title":"A perspective on online partial discharge monitoring for assessment of the condition of rotating machine stator winding insulation","volume":"28","author":"Stone","year":"2012","journal-title":"IEEE Electr. Insul. Mag."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"297","DOI":"10.1109\/TDEI.2005.1430399","article-title":"Partial discharge signal interpretation for generator diagnostics","volume":"12","author":"Hudon","year":"2005","journal-title":"IEEE Trans. Dielectr. Electr. Insul."},{"key":"ref_11","unstructured":"and Mizutani, T. (2008, January 21\u201324). Diagnosis of insulation conditions: Interpretation of partial discharges from \u03c6-q-n pattern, pulse-sequence and pulse waveform. Proceedings of the International Conference on Condition Monitoring and Diagnosis (CMD 2008), Beijing, China."},{"key":"ref_12","doi-asserted-by":"crossref","unstructured":"Emery, F.T. (June, January 31). Reduction techniques of partial discharge, dissipation factor, and external corona for high voltage stator windings. Proceedings of the Electrical Insulation Conference (EIC 2009), Montreal, QC, Canada.","DOI":"10.1109\/EIC.2009.5166364"},{"key":"ref_13","first-page":"180","article-title":"Influence of low-conductive coating on insulation system of rotary electric machine","volume":"63","author":"Kindl","year":"2012","journal-title":"J. Electr. Eng."},{"key":"ref_14","unstructured":"Miao, P., Li, X., Hu, Y., Sheng, G., and Jiang, X. (2012, January 18\u201320). Multi-source separation method for partial discharge detection in substations. Proceedings of the 2012 IEEE Power Engineering and Automation Conference (PEAM), Wuhan, China."},{"key":"ref_15","unstructured":"Wang, L., Ning, W., Wang, L., Lv, H., Wang, H., Jia, S., and Wu, J. (2013, January 20\u201323). Experimental investigation of partial discharge detection in medium-voltage switchgear based on Ultra-High-Frequency sensor. Proceedings of the 2013 2nd International Conference on Electric Power Equipment\u2014Switching Technology (ICEPE-ST), Matsue, Japan."},{"key":"ref_16","unstructured":"Kreuger, F.H. (1989). Partial Discharge Detection in High-Voltage Equipment, Butterworths."},{"key":"ref_17","unstructured":"Weber, H.J. (1984). Partial Discharge Measuring Techniques, Tettex AG Instruments. Tettex-Information 21."},{"key":"ref_18","unstructured":"Osvath, P., Zaengl, W., and Weber, H.J. (1985). Measurement of Partial Discharge\u2014Problems and How They Can Be Solved with a Flexible Measuring System, Tettex AG Instruments. Tettex-Information 23."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"27","DOI":"10.5755\/j01.eee.18.8.2606","article-title":"Design and Verification of Proposed Operation Modes of LLC Converter","volume":"18","author":"Kandrac","year":"2012","journal-title":"Elektronika ir Elektrotechnika"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"33","DOI":"10.5755\/j01.eee.19.5.4364","article-title":"Real Time Harmonic Analysis of Recuperative Current through Utilization of Digital Measuring Equipment","volume":"19","author":"Spanik","year":"2013","journal-title":"Elektronika ir Elektrotechnika"},{"key":"ref_21","unstructured":"(2000). High-Voltage Test Techniques\u2014Partial Discharge Measurements, International Electrotechnical Commission. IEC 60270:2000."},{"key":"ref_22","unstructured":"Grover, F.W. (2013). Inductance Calculations, Dover Books on Electrical Engineering; Reissue; Dover Publications."},{"key":"ref_23","unstructured":"Patocka, M. (2011). Magnetic Phenomena and Circuits, VUT Brno."},{"key":"ref_24","first-page":"1398","article-title":"Simple Inductance Formulas for Radio Coils","volume":"16","author":"Wheeler","year":"1928","journal-title":"Proc. Inst. Radio Eng."},{"key":"ref_25","unstructured":"Babani, B. (1984). Coil Design and Construction Manual, Bernard Babani Publishing. [3rd revised ed.]."},{"key":"ref_26","unstructured":"Kopylov, I., Goryainov, F., Klokov, B., Moroskin, V., and Tokarev, B. (1980). Design of Electric Machines, Energiya."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"188","DOI":"10.1016\/j.ijthermalsci.2011.10.010","article-title":"Power transformer thermal analysis by using an advanced coupled 3D heat transfer and fluid flow FEM model","volume":"53","author":"Tsili","year":"2011","journal-title":"Int. J. Therm. Sci."},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Valchev, V.C. (2017, January 1\u20133). Overview of heat transfer aspects for inductors and transformers for power electronics. Proceedings of the 2017 15th International Conference on Electrical Machines, Drives and Power Systems (ELMA), Sofia, Bulgaria.","DOI":"10.1109\/ELMA.2017.7955405"},{"key":"ref_29","doi-asserted-by":"crossref","unstructured":"Haller, R., Pihera, J., Mraz, P., Kornhuber, S., and Boltze, M. (2011, January 16\u201319). PD behaviour of basic test arrangements under different measurement and evaluation conditions. Proceedings of the 2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (CEIDP 2011), Cancun, Mexico. 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