【摘要】 本文介绍了一种新型油浸式电力变压器绕组热点温度在线监测仪。该监测仪实时采集变压器负荷电流和变压器顶层和底层油温 ,依据国际电工技术委员会推荐的油浸式电力变压器绕组热点计算公式 ,实时监测绕组热点温度。文中介绍了监测仪的测量原理及硬件电路和软件流程 ,给出使用后的数据记录。结果表明 ,该监测仪的稳定性与精度均满足现场测试要求。更多还原

【Abstract】 This paper presents a new type instrument for on line monitoring the coiling hot point temperature of an oil immersed transformer.The load current of the coiling and the temperature of the oil are real time monitored in accordance with the equation which is recommended in the IEC loading guide for calculating the coiling hot point of an immersed transformer.The paper also gives out the measuring principle of the monitoring instrument,hardware circuit,software flowchart and the recorded data from the instrument in use.The results show its stability and accuracy can meet the need of on site tests.更多还原