{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,19]],"date-time":"2026-06-19T07:10:46Z","timestamp":1781853046017,"version":"3.54.5"},"reference-count":25,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2024,7,3]],"date-time":"2024-07-03T00:00:00Z","timestamp":1719964800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Open Fund of State Key Laboratory of Power Grid Environmental Protection","award":["GYW5120201458"],"award-info":[{"award-number":["GYW5120201458"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>Temperature is an important factor for the service life of cable insulation. To ensure safety, the operating temperature of cables must be monitored. Since optical fiber temperature measurement technology is difficult to be used widely in medium voltage (MV) cables due to cost, this paper proposes a temperature evaluation method based on wave velocity. Firstly, the dielectric constant of cross-linked polyethylene (XLPE) cable insulation under different temperature is obtained through experiment. Based on the result, the relationship curve between wave velocity and temperature is established. The asymmetry effect due to temperature gradient in the cable insulation is discussed via finite element simulation. The effectiveness of obtaining the average insulation temperature of the cable based on wave velocity is validated. In addition, the mechanism of the temperature influence on the cable insulation material\u2019s dielectric constant is analyzed by molecular dynamics simulation, which further deepens understanding of the characteristics of cable insulation materials.<\/jats:p>","DOI":"10.3390\/sym16070834","type":"journal-article","created":{"date-parts":[[2024,7,3]],"date-time":"2024-07-03T06:04:18Z","timestamp":1719986658000},"page":"834","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Temperature Evaluation Considering Gradient Distribution for MV Cable XLPE Insulation Based on Wave Velocity"],"prefix":"10.3390","volume":"16","author":[{"given":"Yan","family":"Liu","sequence":"first","affiliation":[{"name":"State Key Laboratory of Power Grid Environmental Protection, Wuhan 430070, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jianben","family":"Liu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Power Grid Environmental Protection, Wuhan 430070, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Longxiang","family":"Zhang","sequence":"additional","affiliation":[{"name":"Hebei Key Laboratory of Green and Efficient New Electrical Materials and Equipment, Baoding 071003, China"},{"name":"Department of Electrical Engineering, North China Electric Power University, Baoding 071003, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuwei","family":"Liang","sequence":"additional","affiliation":[{"name":"Hebei Key Laboratory of Green and Efficient New Electrical Materials and Equipment, Baoding 071003, China"},{"name":"Department of Electrical Engineering, North China Electric Power University, Baoding 071003, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuyao","family":"Zhong","sequence":"additional","affiliation":[{"name":"Hebei Key Laboratory of Green and Efficient New Electrical Materials and Equipment, Baoding 071003, China"},{"name":"Department of Electrical Engineering, North China Electric Power University, Baoding 071003, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4616-5172","authenticated-orcid":false,"given":"Yan","family":"Li","sequence":"additional","affiliation":[{"name":"Hebei Key Laboratory of Green and Efficient New Electrical Materials and Equipment, Baoding 071003, China"},{"name":"Department of Electrical Engineering, North China Electric Power University, Baoding 071003, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,7,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"108140","DOI":"10.1016\/j.epsr.2022.108140","article-title":"Online Multi-parameter Sensing and Condition Assessment Technology for Power Cables: A review","volume":"210","author":"Song","year":"2022","journal-title":"Electr. 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