Metal-oxide surge arresters have dynamic characteristics that are significant for overvoltage coordination studies involving fast front surges. Several models with acceptable accuracy have been proposed to simulate this frequency-dependent behavior. Difficulties arise in the calculation and adjustment of the model parameters: in some cases iterative procedures are required, in others the necess...

this work studies the effect of neutral earth resistance on the controlling ferroresonance oscillation in the power transformer including MOV surge arrester. A simple case of ferroresonance circuit in a three phase transformer is used to show this phenomenon and the three-phase transformer core structures including nonlinear core losses are discussed. The effect of MOV surge arrester and neutra...

Lightning surges that come from transmission lines are very dangerous for equipment in substations, especially transformers. The transformer is a important main component of the substation. As result damage to will distribution electrical energy consumers can be disrupted. solution this problem install an arrester overcome lightning surge voltage order avoid at To secure 150 kV Bukit Semarang B...

This article proposes a new method for the optimal design of zinc oxide arresters based on electric field distribution column using smart algorithms and finite element analysis. prevents premature aging tablets, especially initial final tablets column, which have higher voltage gradient than other parts arrester, subsequently increases sustainability network. The spacer height, fiberglass layer...

A fast current pulse causes a material to heat and undergo rapid expansion. We calculate the response of a cylindrically shaped material to a pulse on the microsecond time scale. The first step is to obtain the breathing modes of elastic oscillation of the cylinder. These modes are calculated using a Rayleigh–Ritz variational method introduced by Demarest for cubes. The boundary conditions are ...