220 kV电流互感器振动台试验研究
The Experimental Study on 220 kV Current Transformer Based on Seismic Simulation Shaking Table

在地震灾害中，变电站电气设备极易遭受到破坏。而电流互感器作为变电站中重要的电气设备之一，其损害会直接影响到地区电力的正常运行，所以要对其抗震性能及减震性能进行试验研究。根据实际地震中的电流互感器状况，采用真实的220 kV电流互感器设备进行地震模拟振动台抗震和减震试验研究。试验考虑了多种地震波形、多种地震强度，特别是强度为高达1 g时国内鲜见的地震模拟振动台试验强度。通过实际测量设备关键部位的加速度、位移及应力参数，对比其抗震、减震性能，研究此电流互感器结构的动力特性和受力性能，综合评定设备的抗震性能。研究表明，所设计的减震器对电流互感器具有较好的减震效果，特别是对电流互感器的顶部加速度有很好的衰减效果，可以在电力设备中进行推广应用。
In earthquake disasters, substation electrical equipment is extremely vulnerable to damage. The current transformer is one of the important electrical equipments in the substation, and its damage directly affects the normal operation of regional power, so its seismic performance, and shock absorption performances should be analyzed. According to the current transformer condition in the actual earthquake, the seismic simulation and shock absorption test of the seismic simulation vibration table are carried out using real 220 kV current transformer equipment. A variety of seismic waveforms and different seismic intensities are considered together for experiment. What’s more, the intensity of seismic simulation shaking table test can be up to 1 g, which can rarely be seen in China. By measuring the acceleration, displacement and stress parameters of key parts of the equipment, the seismic and shock absorption performances compared, and the dynamic characteristics and mechanical performance of the current transformer structure are also studied, then, the seismic performance of the equipment is comprehensively assessed. The experimental results demonstrate that the designed shock absorber has a good shock absorption effect for current transformer, especially for the top acceleration of current transformer.