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Direct-on-line (DOL) permanent-magnet generators (PMSGs) can be applied in small-scale hydropower plants (&#x003C; 10 MW). The Commission Regulation (EU) 2016/631 defines the boundary conditions to operate these generators in parallel with the grid. According to the regulation, fault-ride-through (FRT) capability is required in some cases. We study the FRT scenario of PMSGs by simulations and analyze the importance of machine parameters. Further, suitable ranges for machine parameters were found, and our results can be used as a guideline in PMSG design. The simulation system is verified with measurements of a 600 kW PMSG data during a fault situation: an incident where the generator was connected to the grid in phase opposition.

Parameter Selection Guidelines for Direct-on-Line Permanent Magnet Generators contemplating Fault-Ride-Through Capability