摘要
根据变压器铁心和绕组的发热过程,详细分析了变压器铁心损耗和负载损耗的组成以及其对变压器顶层油温和热点温度的影响,从实际物理意义的角度详细解释了GB/T 15164-1994《油浸式电力变压器负载导则》推荐的绕组热点温度计算方程各参数项的含义。在此基础上,对推荐方程中的绕组指数和油指数项进行了调整和修改,使其对应的物理意义更加合理。文章最后比较了负载导则中推荐方程和改进方程的计算结果,二者反映的热点温度变化趋势相近,计算结果相差较小,改进方程在安全性方面显示出更高的可靠性。
According to the thermal process of transformer core and winding, this paper analyzes the compositions of core loss and load loss and their impacts on top oil temperature and hot-spot temperature of a transformer, and discusses the physical meanings of the parameters of the hot-spot temperature calculation equation recommended in the standard GB/T 15164-1994 （loading guide for oil-immersed .power transformers）. Moreover, the winding temperature exponent and oil temperature exponent of the recommended equation are corrected so that the physical significanees corresponding to those items are more reasonable. The comparison results between the recommended equation and the improved equation indicate that the hot-spot temperature trends to being similar with small difference, and the improved equation shows higher reliability in security.
出处
《高压电器》
CAS
CSCD
北大核心
2009年第1期53-56,共4页
High Voltage Apparatus
基金
国家自然科学基金(50777069)
