Assessing immunity of power systems to effects of high-voltage pulses with power on

The results of investigation of flashovers and damages of power line insulators due to high voltage pulses with power on and power off have shown that joint action of a pulse disturbance and operating voltage of a power line can lead to catastrophic phenomena in power supply systems. High-voltage transformers are much more important and expensive elements of such systems. A set of ways of transformers tests to joint action of pulse disturbance and operating voltage of a high-voltage power line is presented in this article.