抄録
There are plans of transmitting electricity by 1000 kV voltage to improve the efficiency of the utilization of the substations. The bushing that was developed for 1000 kV transmission lines, had a critical condition of the seismic performance, because it was taller than conventional types of voltage range under 500 kV to ensure the larger insulating performance. Therefore, it was confirmed that the bushing, fixed on the vibration table satisfied the seismic safety.
This paper presents results of experiment and analysis as to the vibration behavior of the bushing system, that is connected with connecting leads and is fixed on a concrete foundation, The vibration test was carried out by exciting the foundation. According to the test results, it was found that the connecting leads had a damper effect reducing the bushing response to nearly 20% in the resonance characteristic. It was shown that this damper effect was similar to that of a tuned mass damper. And further, the non-linear behavior of the connecting leads depending on the exciting force, the optimum parameters of connecting leads for damping, and the damper effect of the connecting leads exciting by 3m/s2 three-cycles sinusoidal wave, were discussed.
