{"title":"Transient Behavior of Power Cables Considering Partial Drying Out of the Soil","authors":"Heiner Brakelmann;George J. Anders;Maciej Mroz","doi":"10.1109/TPWRD.2024.3500364","DOIUrl":null,"url":null,"abstract":"The thermal resistivities of the soil and backfill have decisive effects on the current rating of underground cables. An important factor is the possible formation of dry zones around the power cables due to moisture migration induced by thermal and moisture gradients. Whereas a calculation method for stationary and cyclic loads are described in the literature, there are no analytical methods for modeling of moisture migration taking into account changes in the load current over time. This is the main topic presented in this paper. A new analytical approach is presented in the paper, which allows analysis of the soil dryout phenomenon and its effect on cable rating when the cables are subjected to the load varying over time. The paper also reviews the existing two-zone model for the representation of the soil dryout phenomenon in the steady state cable rating calculations. The new developments introduced in this paper are illustrated by several numerical examples.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 1","pages":"376-386"},"PeriodicalIF":3.7000,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Power Delivery","FirstCategoryId":"5","ListUrlMain":"https://ieeexplore.ieee.org/document/10755177/","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
The thermal resistivities of the soil and backfill have decisive effects on the current rating of underground cables. An important factor is the possible formation of dry zones around the power cables due to moisture migration induced by thermal and moisture gradients. Whereas a calculation method for stationary and cyclic loads are described in the literature, there are no analytical methods for modeling of moisture migration taking into account changes in the load current over time. This is the main topic presented in this paper. A new analytical approach is presented in the paper, which allows analysis of the soil dryout phenomenon and its effect on cable rating when the cables are subjected to the load varying over time. The paper also reviews the existing two-zone model for the representation of the soil dryout phenomenon in the steady state cable rating calculations. The new developments introduced in this paper are illustrated by several numerical examples.
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The scope of the Society embraces planning, research, development, design, application, construction, installation and operation of apparatus, equipment, structures, materials and systems for the safe, reliable and economic generation, transmission, distribution, conversion, measurement and control of electric energy. It includes the developing of engineering standards, the providing of information and instruction to the public and to legislators, as well as technical scientific, literary, educational and other activities that contribute to the electric power discipline or utilize the techniques or products within this discipline.
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