Design and built of on - load fully electronic Tap-changer with triac switch: Simulation and practical results

This paper, introduces a new solid-state on - load Tap-changer that has four steps. One of the main requirements of any electrical system is that it should provide a voltage to the consumer which remains within closely defined limits regardless of the loading on the system. Industrial equipment such as speed drives, electronic and control systems are sensitive to voltage variation and affected by bad power quality and poor power factor.