Standard electrical single-line diagrams for distributed generation (DG) systems connecting to the EDP utility grid. This drawings present five distinct connection models covering microgeneration (≤10kW and >10kW) and minigeneration configurations. Each diagram illustrates the interconnection requirements between customer facilities (acessante) and utility infrastructure (acessada), with clearly defined points of common coupling. Key components shown include: visible disconnection devices (DSV), protection equipment, metering points, and AC/DC conversion paths. The diagrams highlight critical protection functions (59N, 27, 32, 81) required for rotating generators and include detailed notes about synchronism checking relays (25) and interconnection requirements. Models 1-4 demonstrate various residential configurations from single units to multi-unit buildings with specifications for inverter and generator equipment to be filled in by the implementing engineer.
Electrical Single-Line Diagrams for EDP Grid-Connected DG Systems
