The Traveling-Wave Approach to Transient Recovery Voltage

Methods are presented for the calculation of circuit-breaker transient recovery voltage. The initial portion of the transient is treated as a traveling wave that is reflected from line terminations back to the breaker, adding to the original voltage wave. A number of refinements in reflection coefficients are considered, each successively increasing the accuracy of the result. The assumptions used in the approach result in a conservative approximation of the actual transient recovery voltage.