基于幂函数模型的高压开关柜温升预测与试验研究  

Study on Temperature Rise Prediction and Test of High Voltage Switchgear Cabinet Based on Power Function Model

作　　者：兰剑 韩冬 冯英 陆德鹏 LAN Jian;HAN Dong;FENG Ying;LU Depeng(China Electric Power Research Institute,Beijing 100192,China;NARI Group Corporation,Nanjing 211106,China)

机构地区：[1]中国电力科学研究院有限公司,北京100192 [2]南瑞集团有限公司,南京211106

出　　处：《高压电器》2023年第10期96-103,共8页High Voltage Apparatus

基　　金：国家电网有限公司科技项目(提高配电开关设备质量关键技术研究)。

摘　　要：文中针对高压开关温升预测缺少电流同温升关系模型这一难点,首次建立导电部位稳定温升τw与电流I的数学模型,得出τw与I的变化规律,通过高压开关柜系列电流下的温升试验,验证了该模型的合理性和准确性。阐述了电器发热基本理论中温升τ与时间t关系模型的推导过程,通过高压开关柜系列电流下的温升试验,进一步研究了该模型下不同试验时间段的拟合温升规律。在温升预测应用中,按文中τw与I的数学模型,求解形成稳定温升与电流标准曲线,作为温度在线监测的判断标准,从而实现故障提前预警。In view of the difficulty of the lacking in the model of current and temperature rise relations in the temperature rise prediction of high voltage switchgear,the mathematical model of the stable temperature riseτw of the conductive position and current I is set up for the first time and the variation betweenτw and I is obtained.The rationality and accuracy of the model are verified by the temperature rise test of high voltage switchgear cabinet series.The derivation process of the relation model between temperature riseτand time t in the basic theory of heating of electrical equipment.The fitting results for the temperature rise of the model at different test periods are studied further through the temperature rise test of current of high voltage switchgear cabinet.In the application of temperature rise prediction,the stable temperature rise and current standard curve are solved and formed in accordance with the mathematical model betweenτw and I,which can be used as the judgment criteria of online monitoring of temperature so as to achieve early warning of fault.

关 键 词：高压开关柜 温升计算模型 曲线拟合 温升预警 

分 类 号：TM591[电气工程—电器]