电力工程技术2019，Vol.38Issue(1)：24-30,7.
计及轴向传热的中低压单芯电缆导体温升状态空间模型
The state space model of conductor temperature estimation considering axial heat conduction for middle and low voltage single core power cable
摘要
Abstract
Power cable conductor temperature is an important parameter to evaluate the ampacity and operation status of transmission line. However, the current cable temperature calculation model can not accurately describe thermal dynamic process of cable operation for ignoring the axial conductor temperature distribution. To solve this problem, a state space model of conductor temperature estimation considering axial heat conduction for middle and low voltage single core power cable was proposed in this paper which based on thermal equilibrium principle. To overcome the shortcoming that the thermal parameters are difficult to accurately calculate, a power cable conductor thermal parameter identification algorithm based on particle swarm optimization (PSO)was proposed. To verify model accuracy, a cable temperature experiment platform was established and the axial temperature of air laying power cable under various current was measured. Comparison of calculation results and experimental results shows that the precision of proposed model is higher than that of IEC 60287 model, the proposed model can meet the precision requirement of middle and low voltage power cable conductor temperature calculation under various current which can be applied to describe the single core power cable thermal dynamic process more accurately.关键词
电缆导体温升/轴向温度分布/状态空间模型/参数辨识/粒子群Key words
power cable conductor temperature/axial temperature distribution/state space model/parameter identification/PSO分类
信息技术与安全科学引用本文复制引用
朱立位,潘宏承,应展烽,何玲..计及轴向传热的中低压单芯电缆导体温升状态空间模型[J].电力工程技术,2019,38(1):24-30,7.基金项目
国家自然科学青年基金资助项目(51607091) （51607091）
