Damping Efficiency Analysis of Metal Dampers for a High-Voltage Electrical Arrester

Abstract

Metal passive energy dissipation dampers are widely used in building structures, but research into their use in high-voltage electrical installations has been limited. This paper employs the passive energy dissipation method for a high-voltage arrester as an example. Metal energy dissipation dampers are designed using the bilinear restoring force model. The factors affecting the damper, including the yield force, yield displacement and ratio between initial and postyield stiffness, which affect the damping efficiency, were analyzed in finite element numerical simulation. The dampers were designed with the optimum parameters found in numerical simulation and were installed at the bottom of an arrester in shake table tests. The dynamic reactions of the arrester with and without dampers were analyzed under the excitation of a resonance wave and artificial waves E and T. Results of simulation and tests show that the dampers designed with the optimum parameters significantly reduced the strain of the bottom of the porcelain bushing, and the damping efficiency increased with the acceleration peak.