Toshiba Corporation has demonstrated the effectiveness of its grid-forming (GFM) inverter, which was developed to ensure the stability of microgrids. A microgrid is a type of distributed energy system that enables regional self-sufficiency for electric power through the use of renewable energy, rather than relying on power supply from large-scale power plants. When there is a sudden fluctuation in the output of or demand for electric power, a normally stable frequency can fluctuate drastically, possibly triggering a protection relay and cutting off power supply, leading to power outages. In particular, as the share of renewable energy increases, fluctuations in grid frequency increase. In particular, frequency fluctuations will increase with increased ratios of renewable energy, so the widespread use of microgrids will require technologies for maintaining a stable grid frequency.
Benefits of grid-forming inverters applied to solar photovoltaic energy systems
