PG&E National Energy Group (NEG)
Commonwealth was involved with the 1200 MW Covert Generating Station during its infancy in the conceptual design phase. Commonwealth assisted the owner, PG&E National Energy Group (NEG), with the interconnection into the Consumers Energy (Michigan) 345 kV bulk power transmission grid.
Commonwealth reviewed the proposed interconnection facilities and system impact studies prepared by Consumers Energy and American Electric Power Company. Commonwealth provided transmission interconnection concepts and design requirements, transmission line and plant switchyard facility concepts, cost estimates, review of plant reactive power capabilities, system impacts for power sales, and review of facility and interconnection agreement contracts.
PG&E NEG then chose Commonwealth to perform the detail design of the Covert 345 kV Switchyard, which was arranged as a 4-breaker ring with ultimate expansion to a six-breaker ring. Detailed engineering and design services included site development, civil, structural, physical electrical, protection and control, and SCADA. Commonwealth also acted as PG&E NEG’s liaison between the transmission provider (Consumers Energy) and the power plant designer (Stone & Webster) to initiate interface requirements. Other responsibilities included equipment procurement, cost tracking/scheduling, startup, and commissioning.
Similar projects by PG&E NEG were typically done as turnkey, where a contract would be awarded to a company that would finance the entire cost of the project, including equipment, engineering, and construction. Commonwealth was able to provide PG&E National Energy Group with a savings of over $2 million by having separate contracts developed for each piece of major equipment with Commonwealth managing procurement.