Network impacts of high penetration of photovoltaic solar power systems

The impacts of PV power plants are associated with voltage profiles, electrical losses, power factor, capacity planning, power quality, system operations and protection. Currently utility-scale solar PV plants have nominal capacities that are compatible with distribution substation MVA ratings e.g., between 1 MVA and 10 MVA, plans are to develop transmission interconnected PV plants in the 50 – 100 MW power range. These distribution network impacts are discussed and mitigation solutions are provided. A case study of a feeder fully loaded with PV power plants will be discussed.

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