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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。
This paper introduces a new type of oil immersed power transformer winding hot spot temperature on-line monitor. The monitor real-time acquisition of transformer load current and transformer top and bottom oil temperature, according to the International Electrotechnical Commission recommended oil-immersed power transformer winding hot spot calculation formula, real-time monitoring of winding hot spot temperature. The paper introduces the measuring principle of the monitor and hardware circuit and software flow, and gives the data record after use. The results show that the stability and accuracy of the monitor meet the field test requirements.