66kV干式空心并联电抗器抗震特性仿真分析

Simulation Analysis on Anti-Seismic Characteristics of the 66 kV Dry Type Hollow Shunt Reactor

应用ANSYS软件建立了66 kV干式空心并联电抗器的三维有限元模型,在运用Block Lanczos法对电抗器结构进行模态分析的基础上,采用振型分解法对8烈度等级下电抗器结构进行了地震响应分析计算。计算结果表明,地震动作用下电抗器的垂直位移要比水平位移小一个数量级,但水平应力却与垂直应力相差不大;支架部分结构是整体结构中最复杂的部分,而且从分析计算中发现该部分是结构中最薄弱的部分,应该是抗震分析中首要关注的地方,特别是绝缘子部分,其许用应力较低,是结构抗震强度验算的关键;电抗器结构在地震动作用下能满足抗震设计强度要求,应力集中处的最大应力小于材料屈服极限。

A 3D finite element model for the 66 kV dry type hollow shunt reactor is established with the help of the ANSYS software in this paper. The Block Lanczos method is used to analyze the structural modal characteristics, and the seismic response of the reactor structure under 8 magnitude earthquake intensity levels is calculated by using the modal decomposition method. The calculation results indicate that the displacement responses in the vertical direction is one order of magnitude less than that in the horizontal direction, but the vertical stress is close to the horizontal stress. The support, as the most complicated part of the overall structure, has the weakest anti-seismic ability according to the calculation results. Thus the support, especially the insulators, is the key component in the anti-seismic characteristics research for its low allowable stress. In addition, the reactor can meet the requirement of the anti-seismic design code and the maximum stress of the stress concentration is less than the yield limit of material.