Microgrid Protection with Conventional and Adaptive Protection Schemes

One of the driving force Microgrid research in past decade has been to accelerate integration renewable energy sources (RES) including wind and photovoltaic (PV) based generation into distribution networks. The islanded mode Microgrids on other hand would not only increase reliability existing networks but also security supply for geographically systems. But as a matter fact, PV systems are inherently intermittent resources so there is always need some kind storage smooth out power fluctuations caused by weather related intermittency. It fact that most well-established generators technologies coupled using electronic converters. electronics converters are, one very flexible quick operate, lacking inertial response limited fault current providers. Present day protection schemes rely single setting group which becomes ineffective with increasing penetration level distributed (DERs) storages. During faults grid-connected high magnitude 10–50 times nominal will be expected from main grid 1–2 available due converter-based generators. conventional overcurrent causes immediate disconnection DERs during does allow any operation safety reasons. An adaptive necessarily required continue even after faults. have at least two reliable settings groups, Microgrid. more sensitive compared considering reduced contribution groups could changed status connecting switches. switches thus (grid-connected or mode) information can exchanged through example IEC 61850 GOOSE communication protocol centralized decentralized architecture offline communication-less local measurements voltage magnitude.