Abstract
Microgrids are an effective way to increase the penetration of DG into the grid. They are capable of operating either in grid-connected or in islanded mode thereby increasing the supply reliability for the end user. This paper focuses on achieving seamless transitions from islanded to grid-connected and vice versa for a single phase microgrid made up from voltage controlled voltage source inverters (VC-VSIs) and current controlled voltage source inverters (CC-VSIs) working together in both modes of operation. The primary control structures for the VC-VSIs and CC-VSIs is considered together with the secondary control loops that are used to synchronize the microgrid as a single unit to the grid. Simulation results are given that show the seamless transitions between the two modes without any disconnection times for the CC-VSIs and VC-VSIs connected to the microgrid.
Original language | English |
---|---|
Journal | I E E E Transactions on Smart Grid |
Volume | 6 |
Issue number | 6 |
Pages (from-to) | 2736-2745 |
Number of pages | 10 |
ISSN | 1949-3053 |
DOIs | |
Publication status | Published - Nov 2015 |
Keywords
- Microgrids
- MGCC
- Droop Control
- Islanded
- Grid- Connected
- Seamless Transition