防灾减灾工程学报2025，Vol.45Issue(2)：427-435,9.DOI:10.13409/j.cnki.jdpme.20231024005
高压变压器抗震性能分析的简化动力学模型研究
Study on Simplified Dynamic Models for Seismic Performance Analysis of High-voltage Transformers
摘要
Abstract
High-voltage transformers are critical components in high-voltage substations,performing essential voltage transformation and power distribution functions for power grids.Their seismic perfor-mance significantly affects the earthquake resistance and post-earthquake recovery capacity of related power grids and power supply areas.High-voltage transformers mainly consist of oil tank system and elevated platform-porcelain bushing system.Both systems are seismically vulnerable,requiring rigor-ous seismic reliability and vulnerability assessments.Currently,common methods for seismic perfor-mance analysis include shaking table tests and finite element analysis.However,their financial costs and computational expenses are relatively high,making them unsuitable for seismic performance anal-ysis that requires multiple seismic response analyses,such as seismic reliability and vulnerability as-sessments.To reduce the cost of single seismic response analysis for high-voltage transformers,this study investigated simplified analysis methods for their seismic seismic performance and then estab-lished a simplified dynamic model for seismic response analysis of high-voltage transformers.The model decomposed the high-voltage transformer into oil tank system and elevated platform-porcelain bushing system.The acceleration response of the oil tank system was simplified using the acceleration amplification factor of the tank roof,and the seismic response of the elevated platform-porcelain bush-ing system was simplified as a 4-degree-of-freedom vibration system that incorporated their rocking characteristics.Subsequently,the simplified models of both systems were coupled,thereby develop-ing a rapid calculation method for the seismic response of high-voltage transformers.A comparative analysis between finite element analysis results and simplified calculation results for the displacement response at the top of porcelain bushings in a 220 kV transformer under typical natural seismic waves validated the calculation accuracy of the simplified dynamic model established in this study.关键词
高压变压器/抗震性能/摇摆效应/加速度放大系数/简化动力学模型Key words
high-voltage transformer/seismic performance/rocking effect/acceleration amplification factor/simplified dynamic model分类
土木建筑引用本文复制引用
顾威,吴承宇,何军..高压变压器抗震性能分析的简化动力学模型研究[J].防灾减灾工程学报,2025,45(2):427-435,9.基金项目
国家自然科学基金项目(51978397)资助 （51978397）
