New Approach for Protection of Distributed Generation using Islanding Technique

Power system's traditional view is characterized by the unidirectional flow of power from a centralized generation to consumers. But for modern view by introducing DGs (Distributed Generations) into distribution system, it results to bidirectional flow of power. Rapid progress in modern technology like wind turbine, fuel cell, photovoltaic and power electronics new innovation, also the demand of customers for better reliability and quality of power are forcing power industry to shift for DGs. Hence DG (distributed generation)has gained momentum in power industry because of de-regulation of market and environmental concerns. When DG continues its power supply even when portion of distributed system becomes isolated electrically from power system remainder, Islanding occurs. DG should have capacity to detect islanding detection for interconnecting DG to power distributed system. Recently industry practices to disconnect all DGs after islands occurrence. In order to achieve this goal, all DGs must equip with detection device for islanding. This is also called as anti-islanding device such as ROCOF relay and vector-surge relay. DOI: 10.17762/ijritcc2321-8169.150711