NDLI: An accuracy assessment method of calculating cable conductor temperature through surface temperature and actual loading current

Content Provider	IEEE Xplore Digital Library
Author	Lei Cheng-hua Liu Gang Liu Yi-gang
Copyright Year	2010
Description	Author affiliation: Transmission Dept. of Guangzhou electrical Power Supply, Guangdong Electric Power Company, China (Liu Yi-gang) \|\| School of Electric Power School, South China University of Technology, Guangzhou, China (Lei Cheng-hua; Liu Gang)
Abstract	The control of cable transmission capacity is decided by the cable capacity, which is determined by the long-term enduring temperature. The cable capacity is usually calculated by the formula of IEC-60287, in which the conductor temperature is supposed to be 90 °C (when its insulation is XLPE), and the cable surface reaches its maximal temperature. However, the maximum temperature of the cable surface is related to the load current. Therefore, taking into account the actual situation, the IEC formula is not so rigorous. In this paper, based on the thermal circuit method, the integrity calculation program is compiled by the MATLAB software, in which the conductor temperature is calculated according to the sheath temperature and the operating current. In order to validate the calculated result, an experiment is made. Then, the experiment data is compared with the theoretical calculated result. The error is analyzed when taking account the conductor loss related to the change of conductor temperature. Then, the relationship between conductor temperature and sheath temperature is given. It is shown that taking into account the conductor loss related to the change of conductor temperature, the thermal circuit method calculating conductor temperature based on the surface temperature and real-time running current can be applied. to It is not necessary to consider the effect of the external environment when the thermal circuit method is applied to engineering calculations.
Starting Page	1
Ending Page	3
File Size	482349
Page Count	3
File Format	PDF
ISBN	9781424462988
ISSN	1089084X
e-ISBN	9781424463015
DOI	10.1109/ELINSL.2010.5549814
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Temperature Conductors Power cables Circuits Mathematical model Cable shielding Thermal conductivity Thermal engineering Power engineering and energy Transient analysis accuracy assessment surface temperature conductor temperature thermal circuit model
Content Type	Text
Resource Type	Article

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