ABSTRACT

Turnkey construction of an HV/MV electrical substation designed to strengthen the regional power distribution network. The project integrates power transformers, MV switchgear, busbar systems, and switching/protection equipment, combined with digital automation and remote control. The substation is coordinated with the existing infrastructure in full compliance with technical and environmental regulations, including assessments of constraints related to areas near Natura 2000 sites. The architecture is designed for smart grid integration, distributed generation, and future expansions.

SCOPE OF SUPPLY

Engineering

·       Network studies; protection and selectivity coordination

·       Electrical and civil layout design

·       Grounding system and lightning protection

·       Electrical P&IDs

·       HSE plans

Supply

·       HV/MV power transformers

·       Circuit breakers and disconnectors

·       Current and voltage transformers (CTs/VTs)

·       MV switchgear

·       Busbar systems

·       Measurement and protection systems

·       SAS/SCADA

·       UPS systems and AC/DC auxiliary services

Civil Works

·       Foundations and slabs

·       Cable trenches and ducting

·       Control and relay buildings

·       Fencing and perimeter security

·       Internal roads and access routes

Installation and Testing

·       Electromechanical installation works

·       Installation of transformer-mounted electrical components

·       Insulating oil treatment

·       Power and control cabling

·       FAT/SAT testing

·       Commissioning

·       O&M training

Documentation

·       As-built drawings

·       Operation manuals

·       Maintenance plans

·       Certificates of conformity

ELECTRICAL ARCHITECTURE AND KEY INSTALLATION DATA

·       Topology: AIS/GIS substation with busbar configuration (e.g. single busbar with bypass or double busbar), scalable for future incomers and feeders

·       Voltage levels: HV interface (e.g. 132–150–220 kV) with transformation to MV for local distribution networks

·       Transformation: HV/MV transformers with on-load tap changers (OLTC), optimized losses, and online condition monitoring systems

·       Protection and Control: Numerical protection relays, IEC 61850 architecture, redundant communication networks, time synchronization (PTP), teleprotection, and remote control

·       Grounding: Earthing grid designed in accordance with CEI/IEC standards (earth resistance, step and touch voltages)

·       Auxiliary Systems: Auxiliary service switchboards, battery systems and chargers for DC supplies, UPS for critical loads, lighting systems, and intrusion detection

·       Cybersecurity & OT: Network segregation, device hardening, access management, and logging in line with industry best practices

·       Compliance: CEI 0-16 / CEI 11-1 and applicable IEC standards; permitting processes and environmental requirements

BENEFITS FOR THE CLIENT

·       Increased network capacity and reliability with reduced outage durations

·       Enhanced operational safety through advanced digital protection and selective coordination

·       Smart grid readiness for integration of renewables, energy storage, and distributed generation

·       Optimized maintainability and total cost of ownership (TCO) through condition-based monitoring and structured O&M plans

·       Full regulatory and environmental compliance, with complete traceability of authorization, testing, and commissioning activities