高压变压器抗震可靠度分析

Seismic reliability analysis of high-voltage transformer

首先分析了变压器的震害特征，找出了变压器的抗震薄弱环节；根据变压器绝缘瓷件的结构特点，建立了具有柔性结点的有限元分析计算模型；应用高压电气设备抗震可靠性分析方祛．对高压变压器进行了抗震可靠性计算．计算结果表明，高压变压器顶部瓷件在低烈度下的抗震性能良好．抗震可靠性指标较高．本文所得结果可为高压电气设备抗震性能评价与区域电力系统抗震可靠性分析提供基础．

This paper deals with the characteristics of earthquake disaster of transformer and analyses the aseismic weak-links of transformer. According to the structural properties of its insulating porcelain bushing, a computing model of the finite element method with flexible joints is set up. The seismic reliability index and probability of a type of high-voltage electrical transformers are obtained by applying the seismic reliability analysis algorithm of high-voltage electric equipments to the calculation of the seismic behaviors of the high-voltage transformer. The results show that aseimic performance of the porcelain bushing is good, and the index of the seismic reliability is relatively high. These calculation results will lay a foundation for the seismic reliability assessment of the high-voltage electric equipment and district power system.