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发明公开
CN104236754A 基于箱壁温度的油浸式变压器绕组热点温度监测方法 无效 - 撤回

基于箱壁温度的油浸式变压器绕组热点温度监测方法
摘要：
本发明涉及一种基于箱壁温度的油浸式变压器绕组热点温度监测方法，该检测的方法步骤为：a.在变压器出油口外侧的油箱壁上安装温度传感器,以获取箱壁温度值θtank；b.采用热电类比法建立热路模型，对油箱壁以内的热传导过程建立热模型，得到基于箱壁温度的热点温度模型，该热点温度模型由热点温度-顶层油温模型以及顶层油温-箱壁温度模型构成；c.通过对公式定义，化解计算可得其通解形式，利用后退欧拉公式进行求解，得到本模型的热点温度值。本发明结构设计科学合理，具有监测精确、提高变压器运行的可靠性、降低停电风险的优点，是一种具有较高创新性的基于箱壁温度的油浸式变压器绕组热点温度监测方法。
摘要（英）：

The invention relates to an oil-immersed transformer winding hot-spot temperature monitoring method based on tank wall temperature. The monitoring method comprises the steps that a. a temperature sensor is arranged on the oil tank wall of the outer side of an oil outlet of a transformer, so that a tank wall temperature value theta tank is obtained; b. a thermoelectricity analogy method is used for establishing a thermal circuit model, a thermal model is established for a heat conduction process in the oil tank wall, a hot-spot temperature model based on tank wall temperature is obtained, and the hot-spot temperature model is formed by a hot-spot temperature-top layer oil temperature model and a top layer oil temperature-tank wall temperature model; and c. by defining a formula, resolving computing is carried out, a general solution mode is obtained, the backward Euler formula is used for solving, and the hot-spot temperature value of the model is obtained. The structure design is scientific and reasonable, the method has the advantages of being accurate in monitoring, transformer operation reliability is improved, power failure risks are lowered, and the oil-immersed transformer winding hot-spot temperature monitoring method based on tank wall temperature is high in innovativeness.

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