MV/LV Substation Refurbishment

PORTO TORRES PLANT – DESIGN OF REFURBISHMENT / REVAMPING OF MV/LV SUBSTATIONS

The project documentation was developed to define all system characteristics and performance and to detail every activity required to carry out the revamping of Primary Substation 116064 at the Porto Torres site.

The new electrical system included the following switchboards:

• QD6 – 6 kV MV switchboard
• QPC1 – 400 V Power Center switchboard
• QSA – 400/230 V Auxiliary Services switchboard
• QK – 110 Vdc Battery Charger switchboard
• QSDA – Automatic Transfer Control switchboard
• QFO – Optical Fiber switchboard
• QKI – UPS switchboard
• QL – Substation Lighting/Small Power switchboard
• QRA – Power Factor Correction, QPC1 Busbar A
• QRB – Power Factor Correction, QPC1 Busbar B

A key aspect of the design was the definition of the high-speed Automatic Transfer System (ATS-HS), ensuring service continuity depending on fault type and the 6 kV MV network configuration. For all MV and LV protections, a redundant Ethernet network via optical fiber was adopted using IEC 61850 protocol.