直埋电力电缆输送能力的分析与研究  

Analysis and Research on Transmission Capacity of Buried Power Cable

作　　者：杨波[1] 马莉莉[1] 毕晨星 YANG Bo;MA Lili;BI Chenxing(Guangxi Electrical Polytechnic Institute,Nanning 530007,China)

机构地区：[1]广西电力职业技术学院,广西南宁530007

出　　处：《红水河》2022年第4期91-95,共5页Hongshui River

基　　金：2022年度广西高校中青年教师科研基础能力提升项目(2022KY1331)。

摘　　要：为充分利用电力电缆的输送能力余量,在保证供电可靠性的前提下动态增加现有线路的输送容量,有必要准确分析直埋电力电缆的输送能力并对电力电缆增容策略展开研究。笔者根据直埋电缆场域的热路模型,列写节点热流方程,并采用四阶Runge-Kutta法计算单回路直埋电缆缆芯温度,进而得到电缆允许增容时间曲线和缆芯温升曲线,并在此基础上分析恒定负荷下单线增容和双线增容两种增容策略。结果表明,双线同时增容可提供更多的增容时间,应避免电缆在过负荷状态下长期运行。In order to make full use of the transmission capacity of power cables and dynamically increase the transmission capacity of existing lines under the premise of ensuring power supply reliability,it is necessary to accurately analyze the transmission capacity of directly buried power cables and study the capacity enhancement strategy of power cables.According to the thermal circuit model of the directly buried cable field,the heat flow equation of the node is listed,and the temperature of the single-loop directly buried cable core is calculated by the fourth-order Runge-Kutta method.Then,the allowable capacity increasing time curve and the temperature rise curve of the cable core are obtained.On this basis,the two capacity increasing strategies of single-line and double-line under constant load are analyzed.The results show that the double line capacity increasing can provide more capacity increasing time,should avoid long-term operation of the cable under overload.

关 键 词：电力电缆 输送能力 热路模型 动态增容 

分 类 号：TM247[一般工业技术—材料科学与工程]