Winding thermometer measurement method

Winding thermometer as an operation monitoring device has been more and more widely used in transformer products, contribute transformer operation safety, the use of transformer have some help. System set of thermometer is the use of 'principle of the thermal simulation' indirect measurement system set of hot spot temperature, the main group into parts: bulb, corrugated pipe and connecting the two capillary, reflect the transformer top oil temperature measurement system; Current transformer, current verifier and electric heating element. Winding thermometer mainly on the basis of an oil temperature table, equipped with a current matcher, and an electric heating element, through out transformer current transformer is proportional to the load current, the converter adjusted by embedded within the elastic component of electric heating element, heat electric heating element, the displacement in the elastic element increase. Therefore, after the transformer on load, displacement of elastic element is mild transformer by the transformer top oil jointly decided by both load current, the temperature of the transformer winding thermometer indicator is the transformer top oil temperature and coil to the sum of the rise of temperature of the oil. In recent years, the power system of the demand is higher and higher, to stable operation of power grids for power transformer substation thermometer temperature measurement accuracy and precision of data demand more and more is also high. At present, the power transformer winding thermometer have a direct measurement and indirect measurement method and thermal simulation measurement. Direct measurement is a direct buried in transformer winding temperature sensors, temperature measuring instrument direct measurement show no winding temperature. Indirect measurement is according to the international electrotechnical commission recommended formula of oil-immersed power transformer winding hot spot, through the calculation of parameters and the transformer load current value calculation method to calculate the winding hot spot temperature is complex, the error is large. In addition, considering the difficulty of the electrical insulation, direct measurement of winding temperature on insulation processing has great difficulty, high cost. So, generally at home and abroad on the principle of the thermal simulation to directly measure temperature of transformer winding. Thermal simulation method of measurement, it is according to the loss of transformer load and load current is proportional to the square, and the development of a winding measurement method. Winding thermometer on the basis of the oil level of the thermostat is equipped with a current verifier and electric heating element, through the transformer winding temperature superposition to reflect the temperature, the temperature measurement method has the characteristics of simple and applicable. 绕组温度计已广泛应用于变压器产品作为一种运行监控。 变压器的安全提交也有助于变压器的使用。 统一温度计间接措施统一热点的温度使用“热模拟”的原则。 主要组件:毛细管温度包和Guanji连接,测量和测量系统反映形成变压器顶层油温; 电流互感器,电流适配器和电加热元件。 绕组温度仪主要是基于油温计,配备电流适配器和一个电热元件。 当前采取的变压器电流互感器与载荷成正比。 调整后的转换器,它是嵌在弹性元件。 电热元件、电热元件产生的热量,增加弹性元件的位移。 因此,变压器加载后,弹性元件的位移是由顶部油温的变压器和变压器的负载电流。 由变压器绕组温度计显示的温度最高油温的变压器及线圈的温度的油。 之和。 近年来,电力系统的稳定运行的要求电网正变得越来越高。 目前,电力变压器绕组温度计的测量方法包括直接测量、间接测量和热模拟测量。 直接测量温度传感器的直接放置在变压器绕组。 温度测量仪用于非直接测量温度 绕组。 间接测量是基于国际电工委员会推荐的公式计算石油——的热点 沉浸电力变压器。 通过计算各种参数和变压器负载电流值、绕组热点温度的计算方法复杂,误差很大。 此外,考虑绝缘的难度,绕组温度的直接测量绝缘处理和高成本有很大困难。 因此,热模拟的原理通常被用来直接测量国内外变压器的绕组温度。 热模拟测量方法是一个绕组测量方法基于平方关系变压器的负载损耗和负载电流。 绕组温度计是配备一个当前的适配器和一个电热元件的基础上,油面温控器,反映变压器的绕组温度通过温度叠加。 该方法简单、适用的特点。