【作者】 任其超； 张国钢； 柯春俊； 耿英三； 王建华；

【Author】 gen Qichao Zhang Guogang Ke Chunjun Gong Yingsan Wang Jianhua (Xi’an JiaoTong University,State Key Laboratory of electrical insulation and power equipment,710049,Xi’an)

【机构】 西安交通大学电力设备与电气绝缘国家重点实验室；

【摘要】 传统的过负荷保护只考虑电流变化对电缆的影响,具有一定局限性。为提高保护准确性,本文以温度作为过负荷保护的判据,综合考虑了环境、电压等因素对温度的影响; 以单芯 XLPE 电缆为例改进了电缆热路模型;设计了使用该模型预测电缆线芯温度的实验。实验结果表明,将该方法应用于过负荷保护是可行的。更多还原

【Abstract】 Only the influence of current variety is taken into account in traditional overload protection.To improve protection accuracy,this thesis took cable’s temperature as the proof of protection,considering not only the influence of current,but the ambient temperature and the voltage.The thermal model of single-core XLPE cable was improved and an experiment was designed to predict cable conductor’s temperature using the improved model.The algorithm was available for overload protection.更多还原