Monte Carlo Computer Calculation of Transmission-Line Lightning Performance

Estimation of the minimum shielding failure flashover current for first and subsequent lightning strokes to overhead transmission lines

A New Approach to Calculation of Lightning Performance of Transmission Lines-Ii

Lightning overvoltages were causing problems on overhead lines well before Tesla and Edison argued over the merits of ac and dc. Many of the overvoltage protection methods for distribution lines follow the same philosophy as that used for telegraph and telephone lines. Modern guides for improving distribution-line lightning performance, such as IEEE 1410, still distinguish between unpreventable outages caused by direct flashes to phase conductors and preventable faults that are caused by flashes to objects or the ground near the line.

New challenges in lightning impulse flashover modeling of air gaps and insulators

A method has been developed to predict the probability of a double circuit outage on double circuit lines. Traveling wave techniques are used to account for nonlinearities such as corona, attenuation, and phase conductor flashover as its time iterative approach enables alteration of design parameters at each time increment. A geometrical model technique, involving comparison of lightning voltages measured on the models with those obtained from linear traveling wave calculations, enables realistic estimation of the value ascribed to tower surge impedance, an important parameter in the calculations.

A. F. Rohlfs

Papers

Impulse Flashover Characteristics of Long Strings of Suspension Insulators