广东电力2017，Vol.30Issue(10)：28-34,7.DOI:10.3969/j.issn.1007-290X.2017.010.006
高压电缆暂态热路中绝缘层最佳分层数的确定方法
Determination Method for Optimal Hierarchy Numbers of Insulation Layer in Transient Thermal Circuit of High-voltage Cable
摘要
Abstract
In order to improve calculation accuracy of cable carrying capacity,this paper analyzes insulation layer which is an important part influencing cable heat transferring and presents a method for determining optimal hierarchy numbers of the insulation layer in transient thermal circuit. It firstly theoretically analyzes computational errors of the centralized parameter model and presents a method of insulation hierarchy for reducing errors. Then it constructs a transient thermal circuit model for the insulation layer by equal thickness hierarchy and determines its parameters. By using MATLAB program,it calcu-lates conductor temperature of any insulation hierarchy which is then compared with measured conductor temperature and works out relative errors of different hierarchies and change rates of relative errors. Finally,according to requirement for actual application,it presents a setting value of the change rate of relative error. With increase of hierarchy number,when the change rate of relative error is just less than setting values,the hierarchy number is the optimal number. Taking YJLW0364/110 kV power cable for an example,it verifies this method and draws a conclusion when the setting value of change rate of the relative error is 0.01 ,the optimal hierarchy number is 15 .关键词
电力电缆/电缆载流量/暂态热路模型/绝缘层/最佳分层数/优化模型Key words
power cable/cable carrying capacity/transient thermal circuit model/insulation layer/optimal hierarchy num-ber/optimization model分类
信息技术与安全科学引用本文复制引用
韩卓展,刘刚,王鹏宇,徐涛,刘毅刚..高压电缆暂态热路中绝缘层最佳分层数的确定方法[J].广东电力,2017,30(10):28-34,7.基金项目
国家高技术研究发展计划(863计划)项目(2015AA050201) （863计划）
