10 kV 三芯电缆应急时间计算模型与验证

doi:10.3969/j.issn.1000-565X.2016.02.013

华南理工大学学报（自然科学版） ›› 2016, Vol. 44 ›› Issue (2): 81-88.doi: 10.3969/j.issn.1000-565X.2016.02.013

10 kV 三芯电缆应急时间计算模型与验证

刘刚¹ 王鹏¹ 李文祥²

1．华南理工大学电力学院，广东广州 510640; 2．广州供电局有限公司，广东广州 510620

收稿日期:2015-01-07 修回日期:2015-08-16 出版日期:2016-02-25 发布日期:2016-01-04
通信作者: 刘刚(1969-) ，男，副教授，主要从事智能高压电网、过电压及其防护、电力设备外缘等的研究． E-mail:liugang@scut.edu.cn
作者简介:刘刚(1969-) ，男，副教授，主要从事智能高压电网、过电压及其防护、电力设备外缘等的研究．
基金资助:
国家高技术研究发展计划( 863 计划) 项目( 2015AA050201)

Calculation Model and its Verification for Cable Emergency Time of 10 kV Three-Core Cable

LIU Gang¹ WANG Peng¹ LI Wen-xiang²

1.School of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong,China; 2.Guangzhou Power Supply Bureau Co.,Ltd.,Guangzhou 510620,Guangdong,China

Received:2015-01-07 Revised:2015-08-16 Online:2016-02-25 Published:2016-01-04
Contact: 刘刚(1969-) ，男，副教授，主要从事智能高压电网、过电压及其防护、电力设备外缘等的研究． E-mail:liugang@scut.edu.cn
About author:刘刚(1969-) ，男，副教授，主要从事智能高压电网、过电压及其防护、电力设备外缘等的研究．
Supported by:
Supported by the National High-Tech R&D Program of China( 863 Program) ( 2015AA050201)

摘要/Abstract

摘要： 以单根直埋敷设的10 kV 三芯电缆为研究对象，建立了电缆暂态热路模型，并将其简化等效为一阶RC 热路，根据所建立模型推导了应急时间与线芯温度的关系式。同时，设计了直埋敷设电缆加载不同应急负荷时的温升实验，实测了各组实验的应急时间。通过与应急时间计算值的对比，分析实验结果与误差，验证了理论计算的正确性，并得到不同应急负荷下的电缆应急时间变化规律，为电力部门指导电力电缆的运行提供理论支持．

关键词: 三芯电缆, 直埋敷设, 暂态热路模型, 线芯温度, 应急时间, 应急负荷

Abstract: transient thermal circuit model of 10kV three-core cables directly laid in soil is established and simplified into an equivalent first-order RC thermal circuit.Then,the relationship between the emergency time and the core temperature is deduced by using the established model,and the temperature rising experiments of the cable are designed and carried out to measure the emergency time under different emergency loads.Finally,the measured values are compared with the calculated ones to verify the correctness of the theoretical calculation,discover the causes of error and reveal the variation of cable's emergency time under different emergency loads.The present study provides a theoretical foundation for the operation of power cables in power sectors.

Key words: three-core cable, direct burial laying, transient thermal circuit model, core temperature, emergency time, emergency load

刘刚王鹏李文祥. 10 kV 三芯电缆应急时间计算模型与验证[J]. 华南理工大学学报（自然科学版）, 2016, 44(2): 81-88.

LIU Gang WANG Peng LI Wen-xiang. Calculation Model and its Verification for Cable Emergency Time of 10 kV Three-Core Cable[J]. Journal of South China University of Technology (Natural Science Edition), 2016, 44(2): 81-88.

10 kV 三芯电缆应急时间计算模型与验证

Calculation Model and its Verification for Cable Emergency Time of 10 kV Three-Core Cable

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