Parametric study of varistor energy requirements for 500 kV series capacitors

Abstract

This paper presents results showing the energy absorption of a series capacitor protective varistor as a function of the most important parameters that affect energy: series capacitor impedance, power system short-circuit impedance, and varistor protective level. These results were developed from computer simulations of a simple 500 kV network model for a realistic range of parameters. The results are general because many specific series capacitor installations in actue.1 networks can be rduced to this simple model.