Affiliations: State Grid Hebei Marketing Service Center, Shijiazhuang, Hebei, China
Correspondence:
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Corresponding author: Zhengang Shi, State Grid Hebei Marketing Service Center, Shijiazhuang 050021, Hebei, China. E-mail: 709777397@qq.com.
Abstract: The accuracy of optical current sensors in power systems will be affected by the interference of the external environment. Among them, temperature has a significant influence on the accuracy of optical current sensors, which is one of the main factors that restrict the practicality of optical current sensors. In this paper, the temperature field distribution of the optical current sensor with iron core is calculated by simulation. The influence of its structural parameters on the temperature field distribution is studied. It is compared with the temperature field distribution of the optical current sensor of the commonly used magnetic ring structure. It is found that under the same current, the temperature of the magneto-optical material with the core optical current sensor is much lower than the optical current mutual inductance of the common magnetic ring structure. The geometric structure parameters of the optical current sensor with iron core have a great influence on its temperature field distribution. The temperature field distribution can be improved by optimizing the structure parameters, thereby improving the measurement accuracy. This article can provide a basis for the design optimization of optical current sensors.
Keywords: Optical current sensor, iron core, temperature field calculation, structural parameters
