气隙结构对特高压并联电抗器铁芯振动的影响

以气隙个数和气隙位置对特高压并联电抗器铁芯振动的影响为主要研究对象,在分析特高压并联电抗器铁芯振动机制的基础上,指出了麦克斯韦力和磁致伸缩力的矢量和是影响铁芯振动强度的主要原因;系统分析了铁芯气隙可能存在的结构型式,搭建了具有不同气隙个数和气隙位置的特高压并联电抗器铁芯的真型仿真模型,并采用多物理场有限元仿真计算的方法,得到了气隙结构对特高压并联电抗器铁芯振动的影响规律。研究结果表明,在研究范围内(气隙个数为15~25),特高压并联电抗器铁芯气隙个数越少则振动强度越弱;气隙位置越靠近底轭则振动越强,越靠近铁芯柱3/4高度中心则振动越弱。在此基础上提出一种特高压并联电抗器铁芯减振设计方案,与现有铁芯设计方案相比该方案能够使铁芯振动位移均方根减小18.925%。

Influence of air gap structure on core vibration of UHV shunt reactor

Taking the influence of the number and position of air gaps on the core vibration of UHV(Ultra High Voltage) shunt reactor as the main research object, based on fully analyzing the core vibration mechanism of UHV shunt reactor, the vector sum of Maxwell force and magnetostrictive force is considered to be the main reason affecting the core vibration intensity. The possible structure types of core air gap are analyzed systematically, the real simulation model of UHV shunt reactor core with different air gap numbers and positions is built, and the influence rule of air gap structure on the core vibration of UHV shunt reactor is obtained by using the calculation method of multi physical field finite element simulation. Study results show that within the study range(the air gap number is between 15 and 25),the smaller the air gap number in the core of UHV shunt reactor, the weaker the core vibration intensity. The air gap position near the bottom yoke can enhance the core vibration intensity, while the air gap position close to the 3/4 height center of the core column can reduce the core vibration intensity. On this basis, a design scheme for core vibration reduction of UHV shunt reactor is proposed, which can reduce the root mean square displacement of core vibration by 18.925 % by comparing with the existing core design scheme.