This technology is a test platform that configures AC and DC microgrids using inverter-based virtual AC distributed power sources, converter-based virtual DC distributed power sources, line/load simulators, and a digital control platform, all connected via an AC/DC interlinking converter. Interface devices equipped with signal magnitude and type converters are positioned between each distributed power source and the control platform.
Microgrids, composed of various distributed power sources like solar, wind, and fuel cells, are the subject of active research into parallel operation, power quality, and stability control algorithms. However, verification under realistic conditions has largely been limited to hardware-in-the-loop simulation. There has been a lack of experimental environments that allow for the direct control of actual power conversion hardware while enabling flexible structural modifications for testing.
This technology allows a digital control platform to regulate output based on the AC/DC voltage, current, and DC link voltage of each virtual distributed power source. It also enables flexible system reconfiguration by using switches to connect or disconnect power sources. Because it drives actual hardware implemented with back-to-back inverters and converters, control and operational algorithms can be designed and verified quickly and reliably. It can be applied to test facilities for power conversion device manufacturers and AC/DC hybrid microgrid research institutions, shortening the time required to verify algorithms at a physical level before field deployment.
This invention was developed with support from the Ministry of Trade, Industry and Energy for the development of resilient hybrid technology for high-quality microgrids.
WO2019-017574A1
