Transient Temperature Calculation of Buried Cable Core Based on Parameter Fitting of Thermal Circuit

doi:10.11930/j.issn.1004-9649.2016.10.060.07

Abstract

Abstract: Transient temperature calculation of buried cable is of great importance in distribution capacity distribution and security warning. However, in practice thermal parameters of insulation material and surrounding soil are either difficult to obtain or subject to slow variations due to aging effects. Those lead to inaccurate cable temperature calculation results by means of numerical calculation or traditional equivalent thermal circuit. A thermal circuit based approach is proposed by fitting equivalent thermal circuit parameter with trust-region algorithm when the station and laying environment of the cable is known. A simplified formula is deduced to avoid parameter acquisition difficulty and reduce calculation complexity. The temperature-rise experiment data of a 110 kV cable proves validity of proposed method.

Key words: parameter fitting, transient calculation, thermal circuit, trust region

CLC Number:

TM757.3

HUANG Xiongfeng, XU Binzhao, ZHANG Yujiao, CUI Houkun, WANG Tinghua, AN Zengjun. Transient Temperature Calculation of Buried Cable Core Based on Parameter Fitting of Thermal Circuit[J]. Electric Power, 2016, 49(10): 60-66.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2016.10.060.07

https://www.electricpower.com.cn/EN/Y2016/V49/I10/60

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