作者: Josep M. Guerrero
DOI: 10.1109/ISIE.2010.5637667
关键词:
摘要: • Droop-controlled microgrids can be used in islanded mode. New concept of flexible operate both grid-connected and Improvements to the conventional droop method are required for integrate inverter-based energy resources: Improvement transient response Virtual impedance: harmonic power sharing hot-swapping Adaptive control laws The hierarchical is a AC microgrid, analogous as those proposed DC-coupled microgrid: Primary based on allowing connection different sources without any intercommunication. Secondary avoids voltage frequency deviation produced by primary control. Only low bandwidth communications needed perform this level. A synchronization loop add level transfer from islanding grid connected modes. Tertiary allows import/export active reactive grid. Additional features also microgrids: Voltage ride-through Black-start operation Grid impedance estimation Storage management