On Harmonic Injection Anti-Islanding Techniques Under the Operation of Multiple DER-Inverters

摘要: This paper studies the significant impact of distributed-energy-resource (DER) inverters (which are connected to same node) on anti-islanding protection DER-installations. As it concerns harmonic injection-based schemes, induced voltage component that is provoked by each inverter compromised, as synchronous injection (injection at time intervals) among cannot be reassured. Therefore, schemes will fail if falls below a certain level. In this framework, novel metric (i.e., upgrade factor, UF ) introduced, indicating supplementary power (of DERs) can installed in point common coupling without compromising effectiveness scheme. enables evaluation prior future integration DERs, could substantial addendum into relevant standards evaluates features grid-tied DER-inverters. Finally, proposes technique (implemented software level), which maximizes and reassures under variations inverters. Extensive simulations experimental tests have been conducted verify proposed strategy various penetration-levels islanding-network conditions.