As part of an EPC project, we built a new substation as a double-circuit substation with two 40/50 MVA transformers. The substation is used to feed electricity from the Kargow and Schlön PV parks; plans are already in place to integrate a battery storage system. Despite a tight schedule and the restrictions imposed by a nature reserve, we were able to hand over the plant on time and in the required quality.

At a glance

• 2x 40/50MVA into the 110 kV grid: transformers for maximum operational flexibility
• Two PV parks connected: Schlön in operation, Kargow shortly before construction start
• BESS-ready: substation and protection concept designed for future battery storage
• Construction in nature reserves: Approval-compliant, environmentally friendly construction methods, careful logistics
• Hypact switch panels integrated: Compact technology for quick installation and small footprint
• On schedule & during the year: Realisation in the current year – handover as planned

• Construction of a substation as a double-ended substation with two 40/50 MVA transformers
• Grid-side feed-in from the Kargow and Schlön PV parks
• Preparation for battery storage (areas, cable routes, protection and control technology conceptually taken into account)

Key challenges

• Location in a nature reserve: strict environmental and building regulations
• Safety: modern protection and control technology, occupational safety on the construction site
• New technology: Integration of Hypact compact fields and BESS preparation
• Tight schedule & construction during the year: limited weather and closure windows

• Completion of civil engineering works
• Completion of switchgear building
• Delivery of Hypact fields
• Delivery of transformers
• Delivery of MV system
• Commissioning of substation
• Handover to operator

• Complete in-house planning: primary/secondary technology, protection, control technology, BESS preparation
• Monitoring of all construction work (civil engineering, steel construction, cable routes, earthing)
• Delivery and installation of main components, including Hypact fields and transformers
• Quality and function: protection testing, commissioning, documentation
• Partner management: clear interfaces, construction meetings, approvals
• Communication hub: central coordination of all project participants
• Schedule and cost control: transparency regarding progress and budget

Challenges & Solutions

• Schedule risks addressed early on -> rescheduling of construction phases, parallelisation of trades
• Additional services (supplementary offer) covered transparently -> clear scope definition
• Nature conservation requirements complied with -> careful logistics, soil protection, ecological construction supervision

• On schedule: handover within the planned time frame
• Quality assured: complete testing and acceptance documentation
• Future-proof: substation BESS-ready, flexible operation management thanks to 40/50 MVA transformers
• High plant availability: modern protection and control technology, compact switchgear

This project demonstrates our strength in implementing sophisticated energy infrastructure on schedule and with quality assurance – even in nature reserves. With the construction of a new substation as a double-ended connection and two 40/50 MVA transformers, we have ensured the feed-in of the Kargow and Schlön PV parks and designed the plant to be BESS-ready. The handover took place on schedule, with documented functionality, high availability and clear prospects for further expansion.