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国内外大量变压器震害资料表明,降低变压器及套管体系的加速度响应是提高变压器及套管抗震能力的关键。针对变压器及套管体系的结构特点,提出变压器隔震设计的最低目标和3种有效的变压器隔震型式与布置方案,成功研制了变压器组合隔震支座并进行力学性能试验,并提出与变压器隔震设计相对应的验算指标。最后,结合四川220 kV下孟变电站1#主变,开展变压器隔震技术的设计与应用。研究表明只要通过合理设计,变压器隔震技术可有效降低变压器及套管的地震响应,提高变压器的抗震能力。
A large number of domestic and foreign transformer seismic damage data show that reducing the acceleration of the transformer and casing system response is to improve the seismic resistance of transformers and casing the key. According to the structural characteristics of transformer and casing system, the minimum target of transformer isolation design and three kinds of effective isolation type and arrangement scheme of transformer are put forward. The transformer combination of isolated bearings and the mechanical performance test are successfully developed. Isolation design corresponding to the checking index. Finally, combining with the 1 # main transformer of Xia Meng Substation in Sichuan, the design and application of transformer isolation technology are carried out. Research shows that as long as the reasonable design, transformer isolation technology can effectively reduce the seismic response of transformers and casing to improve the seismic capacity of the transformer.