变电站主变压器隔震和消能减震技术研究

Research on the Shock-isolation and Energy Dissipation Technology of Primary Transformers in Substations

为了改善变电站主变压器在地震灾害中破坏大、修复难的现状,提高其抗震能力,以汶川地震中主变压器损坏调研情况为基础,运用隔震和消能减震理论进行了分析论证,提出了在主变压器本体及基础设计中应用隔震和消能减震技术。具体阐述了此技术通过延长基本自振周期和提高阻尼比,达到隔离地震能量输入、减小地震作用的原理和效果,并和传统抗震加固措施进行了比较,结果证明了此技术的优越性。最后给出了两个设计方案供已有变电站加固或新建变电站实施时参考。

Because primary transformers in substation will be wrecked badly in earthquake disaster and are hard to repair,so it is necessary to improve the ability of its anti-shock.Based on the damage investigation of primary transformer during wenchuan earthquake disaster,isolation and energy dissipation technologies are applied to body and basic design of primary transformer after analytic demonstration.Through prolonging basic vibration periods,this technique can improve damping ratio,realize the isolation of energy input in earthquake and reduce influence of earthquake.It is verified that this technique has its advantage by comparing with traditional anti-shock and reinforce measures.In the end,two design schemes are presented as reference to substation reinforcing or building.