Substation Projects

The electrical substations in the St. Thomas-St. John district experienced severe damage due to storm-driven wind, rain, and debris to the facilities caused by Hurricanes Irma and Maria.

Substation Project Benefits

The completion of the Substation Mitigation project will return stability and reliability to the Electrical System, which will reduce outage times, and will assist in faster restoration times.

The new Concrete structures will be strong enough to withstand flying debris from hurricane force winds, limit water entry and are more storm-resistant than the prior steel buildings.

Allows the Authority to have flexibility for scheduled maintenance or outages on the Transmission System and Distribution System.

Gas Insulated Switchgear’s (GIS) are more reliable, require minimal maintenance, use a smaller footprint and are safer for operational and engineering staff.

East End Substation and Transformer Repair Project

Project Overview: This project includes designing manufacturing, procuring and installing 34.5kV &13.8kV Gas Insulated Switchgear (GIS, associated meters relays).

Customers Impacted: 5,473 customers

Areas Impacted: Eastern Portion of the island. Residential and commercial areas, Schools, and Water pump stations

Project Overview (cont.):
Installation of an emergency generator, replacement of the metal clad building with concrete buildings, and the repair of the DT1 Power Transformer.

Critical Facilities/Low Income:
Nadir Pump Station, Ivanna Eudora Kean High School, Bovoni Housing Community, Thomasville Housing Community, Ferry Urman Victor Fredricks (Marine Terminal)

Project Benefits:
The return of East End Substation will return stability and reliability to the Electrical System, which will reduce outage times, and will assist in faster restoration times. The Concrete walls are strong enough to withstand flying debris from hurricane force winds, limit water entry and are more storm-resistant than the prior steel buildings. The new Switchgears are also safer for personnel to operate, require less maintenance and has a smaller footprint.

Estimated Cost: $9,476,209.01

Donald Francois Substation Project

Project Overview: This project includes designing, manufacturing, procuring and installing 34.5kV &13.8kV Gas Insulated Switchgear (GIS), the associated meters, relays and DC batteries.

Customers Impacted: 6,715 customers.

Areas Impacted: Central Portion of the island. Residential and commercial areas, Schools, and Water pump stations

Critical Facilities/Low Income:
Oswald Harris Court Housing Community, Paul M. Pearson Garden RLS Hospital, Charlotte Amalie High School, Sibilly Elementary School, Lockhart Elementary Schools, Caribbean Kidney Center, Cancryn Intermediate and Junior High School, nursing homes, and banks.

Project Benefits:
This project will decrease the number of outages caused by the currently installed damaged switchgear, reduce outage times, and the new configuration will add more redundancy to the overall electrical system. The new Switchgears are also safer for personnel to operate, require less maintenance and has a smaller footprint.

Estimated Cost: TBD

Tutu Substation Restoration Project

Project Overview: This project includes designing, manufacturing, procuring and installing 34.5kV &13.8kV Gas Insulated Switchgear (GIS, associated meters relays), install an emergency generator and replace the metal clad building with concrete buildings.

Customers Impacted: 5,707 customers

Areas Impacted: Central and Eastern Portion of the island. Residential and commercial areas, Schools, and Water pump stations

Critical Facilities:
Tutu Hi-Rise Housing Communities, Grandview Low-income housing Lovelund low income housing, Donoe low income housing, Donoe Pump Station, Gomez Elementary School, and Bowsky Elementary School, and Tutu Fire Station.

Project Benefits:
The rebuilding of Tutu will return stability and reliability to the Electrical System, which will reduce outage times, and will assist in faster restoration times. The Concrete walls are strong enough to withstand flying debris from hurricane force winds, limit water entry and are more storm-resistant than the prior steel buildings. The new Switchgears are also safer for personnel to operate, require less maintenance and has a smaller footprint.

Estimated Cost: TBD