高压电抗器气隙及外围参数对声场特性的影响

Influence of the Air Gap and Peripheral Parameters of the High-voltage Reactor on Sound Field Characteristics

高压并联电抗器是常用的无功补偿设备,其在正常工作时噪声明显。利用数值仿真方法实施电抗器的电磁、振动及噪声的多物理场仿真。基于二维轴对称模型,分析高压电抗器内部的电磁场特性、应力应变特性以及电抗器外部延伸到变电站外部空间的声场分布特性;分析单台高压电抗器铁心参数,尤其是不同铁心堆叠参数对声场分布的影响;总结不同频率下声场分布特性与电抗器结构参数的关系;分析混泥土墙的降噪效果和设置方法。为从噪声监测信息反演电抗器本体噪声和电抗器参数特征提供理论支持,并为高压电抗器噪声的有效控制提供方法基础。

High voltage shunt reactor is a commonly used reactive power compensation equipment,which has obvi⁃ous noise during normal operation.This paper uses numerical simulation methods to implement a multi-physics simu⁃lation of reactors,including electromagnetic,vibration and noise fields.Based on the two-dimensional axisymmetric model,the electromagnetic field characteristics,stress and strain characteristics inside the high-voltage reactor and the acoustic field distribution characteristics extending from the reactor to the external space of the substation are ana⁃lyzed.The influence of core parameters of a single high-voltage reactor,especially different core stacking parameters,on the sound field distribution is analyzed.The relationship between sound field distribution characteristics and reactor structure parameters at different frequencies is summarized.and the noise reduction effect and setting method of the concrete wall are analyzed.It provides theoretical support for inversion of reactor noise and reactor parameter characteristics from noise monitoring information,and provides a method basis for effective control of high-voltage re⁃actor noise.