Comprehensive Simulation Study of Electromagnetic Characteristics of Power Transformers in Nuclear Power Plants

Abstract

Abstract With the continuous development of society, there is an increasing demand for higher transmission voltage levels. Simultaneously, there is a pressing need for electric energy that offers enhanced reliability and power quality. To efficiently utilize high-voltage power, a series of transformers are employed to accurately regulate voltage. Hence, it becomes crucial to design transformers in a rational manner. In the modern era, transformer simulations can be conducted using powerful software, with the finite element method (FEM) being a popular choice due to its flexibility, versatility, and efficient problem-solving capabilities. The data obtained through this method holds significant practical significance for assessing and designing transformer performance. This study aims to address the limitations encountered in practical engineering applications by analyzing 3D magnetic field simulation results of power transformers operating at 5% and 85% capacity. Additionally, a detailed analysis of electric field conditions in the main insulation of high and low voltage coils is performed under four different operating conditions − 100% rated voltage, 95% rated voltage, 105% rated voltage, and high voltage short-time induction. The insights gained from these simulation results provide a crucial theoretical foundation and design concepts for power transformers operating in nuclear power plants. Furthermore, these findings hold significant reference value for enhancing the reliability and performance of power transformers in practical applications.