Fuzzy logic controller-based synchronverter in grid-connected solar power system with adaptive damping factor

• DOI: 10.23919/cjee.2021.000014
• Publication Date: 2021-07-09T19:52:07Z
• Authors: Kah Yung Yap; Chee Ming Beh; Charles R. Sarimuthu
• Keywords: Frequency grid

In recent years, renewable energy sources, specifically solar power systems, have developed rapidly owing to their technological maturity and cost effectiveness. However, its grid integration deteriorates frequency stability because of insufficient rotating masses inertial response. Hence, a synchronverter, which is an inverter that mimics the operation synchronous generator, crucial interface in grid. It stabilizes by emulating virtual inertia. conventional proportional-integral (PI)-based synchronverter not equipped with adaptive damping factor (Dp) or digitalized smart controller manage fast-responding inputs. novel fuzzy logic (FLC) framework proposed such can operate grid-connected system. this study, Dp controlled real time using FLC achieve balance between speed for error correction based on difference. Results four case studies performed Matlab/Simulink show FLC-based stabilize reducing deviation at least 0.2 Hz (0.4%), as compared PI-based synchronverter.