{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,13]],"date-time":"2025-11-13T07:08:34Z","timestamp":1763017714140,"version":"build-2065373602"},"reference-count":19,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2017,1,27]],"date-time":"2017-01-27T00:00:00Z","timestamp":1485475200000},"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>To separate and locate multi-partial discharge (PD) sources in a substation, the use of spectrum differences of ultra-high frequency signals radiated from various sources as characteristic parameters has been previously reported. However, the separation success rate was poor when signal-to-noise ratio was low, and the localization result was a coordinate on two-dimensional plane. In this paper, a novel method is proposed to improve the separation rate and the localization accuracy. A directional measuring platform is built using two directional antennas. The time delay (TD) of the signals captured by the antennas is calculated, and TD sequences are obtained by rotating the platform at different angles. The sequences are separated with the TD distribution feature, and the directions of the multi-PD sources are calculated. The PD sources are located by directions using the error probability method. To verify the method, a simulated model with three PD sources was established by XFdtd. Simulation results show that the separation rate is increased from 71% to 95% compared with the previous method, and an accurate three-dimensional localization result was obtained. A field test with two PD sources was carried out, and the sources were separated and located accurately by the proposed method.<\/jats:p>","DOI":"10.3390\/s17020247","type":"journal-article","created":{"date-parts":[[2017,1,27]],"date-time":"2017-01-27T11:23:02Z","timestamp":1485516182000},"page":"247","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["A Novel Method for Separating and Locating Multiple Partial Discharge Sources in a Substation"],"prefix":"10.3390","volume":"17","author":[{"given":"Pengfei","family":"Li","sequence":"first","affiliation":[{"name":"School of Electrical Engineering, Wuhan University, No.299, Bayi Road, Wuhan 430072, China"}]},{"given":"Wenjun","family":"Zhou","sequence":"additional","affiliation":[{"name":"School of Electrical Engineering, Wuhan University, No.299, Bayi Road, Wuhan 430072, China"}]},{"given":"Shuai","family":"Yang","sequence":"additional","affiliation":[{"name":"School of Electrical Engineering, Wuhan University, No.299, Bayi Road, Wuhan 430072, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6162-8879","authenticated-orcid":false,"given":"Yushun","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Electrical Engineering, Wuhan University, No.299, Bayi Road, Wuhan 430072, China"}]},{"given":"Yan","family":"Tian","sequence":"additional","affiliation":[{"name":"Guangzhou Power Supply Bureau Co. Ltd., No.38, Huangshidong Road, Guangzhou 510620, China"}]},{"given":"Yong","family":"Wang","sequence":"additional","affiliation":[{"name":"Guangzhou Power Supply Bureau Co. Ltd., No.38, Huangshidong Road, Guangzhou 510620, China"}]}],"member":"1968","published-online":{"date-parts":[[2017,1,27]]},"reference":[{"key":"ref_1","unstructured":"Portugues, I., Moore, P.J., and Glover, I.A. (2003, January 1\u20135). Frequency domain characterisation of partial discharges via a non-invasive measurement system. Proceedings of the International Conference on Properties and Applications of Dielectric Materials, Nagoya, Japan."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"528","DOI":"10.1109\/TPWRD.2005.848438","article-title":"Partial discharge investigation of a power transformer using wireless wideband radio-frequency measurements","volume":"21","author":"Moore","year":"2006","journal-title":"IEEE Trans. Power Deliv."},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Liu, Y., Zhou, W., and Li, P. (2016). An Ultrahigh Frequency Partial Discharge Signal De-Noising Method Based on a Generalized S-Transform and Module Time-Frequency Matrix. Sensors, 16.","DOI":"10.3390\/s16060941"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Zhang, Y., Upton, D., and Jaber, A. (2015, January 2\u20133). Multiple Source Localization for Partial Discharge Monitoring in Electrical Substation. Proceedings of the Loughborough Antennas & Propagation Conference, Loughborough, UK.","DOI":"10.1109\/LAPC.2015.7366001"},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Portugues, I.E., and Moore, P.J. (2006, January 18\u201322). Study of propagation effects of wideband radiated RF signals from PD activity. Proceedings of the Power Engineering Society General Meeting, Montreal, QC, Canada.","DOI":"10.1109\/PES.2006.1709351"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"384","DOI":"10.5370\/JICEE.2011.1.4.384","article-title":"Estimation of DOAs of EM Waves Emitted from Multiple Partial Discharge Sources in Free Space by Using Wideband Signal Subspace Methods","volume":"1","author":"Tian","year":"2011","journal-title":"J. Int. Counc. Electr. Eng."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"809","DOI":"10.1109\/TPWRD.2014.2323080","article-title":"A Novel Algorithm for Separating Multiple PD Sources in a Substation Based on Spectrum Reconstruction of UHF Signals","volume":"30","author":"Hou","year":"2015","journal-title":"IEEE Trans. Power Deliv."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"133","DOI":"10.1109\/TDEI.2010.5412011","article-title":"A frequency-based RF partial discharge detector for low-power wireless sensing","volume":"17","author":"Baker","year":"2010","journal-title":"IEEE Trans. Dielectr. Electr. Insul."},{"key":"ref_9","unstructured":"Portugues, I., Moore, P.J., and Glover, I.A. (2003, January 1\u20135). The effect of multipath in time domain characterization of partial discharges. Proceedings of the International Conference on Properties and Applications of Dielectric Materials, Nagoya, Japan."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"20","DOI":"10.1109\/TPWRD.2008.2005464","article-title":"RF-Based Partial Discharge Early Warning System for Air-Insulated Substations","volume":"24","author":"Portugues","year":"2009","journal-title":"IEEE Trans. Power Deliv."},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Li, P., and Zhou, W. (2017). A Novel Method for Partial Discharge Localization in Air-insulated Substations. IET Sci. Meas. Technol.","DOI":"10.1049\/iet-smt.2016.0251"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"2264","DOI":"10.1109\/TPWRD.2004.843397","article-title":"Radiometric location of partial discharge sources on energized high-Voltage plant","volume":"20","author":"Moore","year":"2005","journal-title":"IEEE Trans. Power Deliv."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"472","DOI":"10.1109\/TPWRD.2014.2344014","article-title":"Localization Algorithm for the PD Source in Substation Based on L-Shaped Antenna Array Signal Processing","volume":"30","author":"Hou","year":"2015","journal-title":"IEEE Trans. Power Deliv."},{"key":"ref_14","first-page":"1379","article-title":"A Selected Bi-Spectrum Based Separation Algorithm for Multi-PD Sources in Substation","volume":"38","author":"Hou","year":"2014","journal-title":"Power Syst. Technol."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"196","DOI":"10.1109\/TDEI.2005.1430390","article-title":"A comment concerning the rise times of partial discharge pulses","volume":"12","author":"Bartnikas","year":"2005","journal-title":"IEEE Trans. Dielectr. Electr. Insul."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"213","DOI":"10.1109\/94.486773","article-title":"The excitation of UHF signals by partial discharges in GIS","volume":"3","author":"Judd","year":"1996","journal-title":"IEEE Trans. Dielectr. Electr. Insul."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1492","DOI":"10.1126\/science.1242072","article-title":"Clustering by fast search and find of density peaks","volume":"344","author":"Rodriguez","year":"2014","journal-title":"Science"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"210","DOI":"10.1016\/j.neucom.2016.01.102","article-title":"Clustering by fast search and find of density peaks via heat diffusion","volume":"208","author":"Mehmood","year":"2016","journal-title":"Neurocomputing"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1881","DOI":"10.1109\/LAWP.2016.2542269","article-title":"A Novel Miniaturized Vivaldi Antenna Using Tapered Slot Edge with Resonant Cavity Structure for Ultra-wide Band Applications","volume":"1","author":"Liu","year":"2016","journal-title":"IEEE Antennas Wirel. Propag. Lett."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/17\/2\/247\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T18:27:08Z","timestamp":1760207228000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/17\/2\/247"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017,1,27]]},"references-count":19,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2017,2]]}},"alternative-id":["s17020247"],"URL":"https:\/\/doi.org\/10.3390\/s17020247","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2017,1,27]]}}}