A New Time Domain Based Distance Protection for Networks Connected with Inverter Based Unconventional Sources

Distance protection is widely used in transmission networks and constitutes a large installed base across grid systems. The most common implementation of distance protection is based on voltage and current phasors. However, today’s electric grids are becoming increasingly complex and dynamic. The integration of power-electronic converter-interfaced systems—such as renewables, HVDC, and FACTS—demands fast, secure, and reliable protection decisions, while phasor-based distance protection remains inherently limited in both speed and reliability.