Four-core low-voltage cable core temperature refined estimation method

The invention relates to a four-core low-voltage cable core temperature fine estimation method, which is based on a thermal model for establishing heat balance of any node of a cable thermal equivalent circuit, and utilizes the thermal model to calculate cable energy loss of mutual heating among fou...

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Bibliographic Details
Main Authors YE YINGQIAO, STIER, WEN ZUOREN, ZHOU YUXIAO, REN ZHILI, PAN PENG, CHEN ZHI, GU YU, LI JING, KIM E-IN, ZHAO JIAN
Format Patent
LanguageChinese
English
Published 28.07.2023
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:The invention relates to a four-core low-voltage cable core temperature fine estimation method, which is based on a thermal model for establishing heat balance of any node of a cable thermal equivalent circuit, and utilizes the thermal model to calculate cable energy loss of mutual heating among four-core cable phases during harmonic wave. Substituting the cable energy loss into a cable insulation thermal resistance formula and a cable load order reduction coefficient formula to obtain cable insulation thermal resistance and a cable load order reduction coefficient under the influence of mutual heating of cable phases; according to the method, a relatively accurate result can be obtained, so that the early insulation thermal damage degree is more accurately judged, power system damage caused by inconformity with expected cable service life shortening is avoided, and the accuracy of loss research of the cable at a harmonic wave position is ensured. 本发明涉及一种四芯低压电缆线芯温度精细化估计方法，所述估计方法基于建立电缆热等效电路任意节点热平衡的热模型，利用热模型计算谐
Bibliography:Application Number: CN202310530720