| Title |
Field Application of Virtual Synchronous Machine to Improve Frequency Stability in an Island Grid |
| Authors |
류호선(Hoseon Ryu) ; 이셩구(Kyungkyu Lee) ; 허건(Geon Heo) ; 박용순(Yongsoon Park) |
| DOI |
https://doi.org/10.5370/KIEE.2023.72.9.1035 |
| Keywords |
RES (Renewable Energy Source); VSM (Virtual Synchronous Machine); BESS (Battery Energy Storage System); IBR (Inverter-Based Source) GFM (Grid-Forming Inverter) |
| Abstract |
Irregular power generations from renewable energy sources and instantaneous load fluctuations cause frequency stability problems in an island grid. The grid frequency in an island grid generally undergoes lager fluctuations compared to other grids due to its low grid inertia. Recently, virtual synchronous machine (VSM) technologies based on battery energy storage systems (BESSs) are emerging as a solution to enhance the grid inertia. A VSM emulates behaviors of a synchronous machine through an inverter to provide the inertial and damping responses. This paper addresses the development of VSM to stabilize grid frequency of Biyangdo, small island around Jeju island in South Korea. The developed VSM algorithm has been applied to a 250kW-BESS inverter in Biyangdo. The effectiveness of applying VSM in the island grid is assessed through the on-site test results. |