Substation Engineering

ExecuPOWER’s experience consists of all stages and facets of extra-high to distribution voltage substation development, design, procurement, cost estimating, construction, commissioning, and operation.

Our technical team has the experience and capability necessary to design new and retrofit substations integrating new and legacy technologies for cost-effective solutions. Successful substation projects require extensive collaboration across all our disciplines including our construction managers who participate in our QA/QC process prior to any design package being issued. Our drive is to exceed our client’s expectations by delivering a quality product with safety and sustainability as an integral part of our design.

OUR ENGINEERING TEAM HAS THE BREADTH AND DEPTH OF KNOWLEDGE NECESSARY TO PROVIDE COSt-EFFECTIVE DESIGNS THAT ARE MINDFUL OF CONSTRUCTION AND ENVIRONMENTAL NEEDS.

Substation Engineering Capabilities

OUR SERVICES INCLUDE:

Protection and control substation engineering, design, and calculations
Outdoor electrical (physical) substation engineering, design,
and calculations
Structural substation engineering, design, and calculations (structures, foundations, bus design, oil containment)
Civil substation engineering design (grading, drainage, SWPP)
Gas-insulated switchgear design
Cutover sequencing/outage planning
NERC-CIP security compliance support
Inter-substation and intra-substation telecommunication integration

SCADA/RTU and digital fault recorder design
AC & DC station service engineering, design, and calculations
Equipment specification development, review, and vendor analysis
Conceptual engineering, planning and cost estimating
Permitting support
Field engineering and construction management
Equipment and material procurement
Storm hardening
Owners engineering and QA/QC services

Project Portfolio Highlights

69kV Stuck Breaker and Line Relay Upgrade

69kV transmission line protection relay upgrade included 69kV circuit breaker control, and 69kV stuck breaker protection for an existing 69kV nine breaker ring bus and a 138kV five breaker ring bus substation with 25kV radial feeds.

13kV/4kV Transformer, Lighting, & Cable Tray Replacement

13kV/4kV transformer replacement, performed the complete physical (electrical) and lighting designs. Scope consisted of replacing the transformer and jumpers to the existing copper busses, replacement of nine (9) cap & pin type insulators for the 4kV bus with station post type, knockout wall replacement, new cable tray system, and installation of new LED lighting fixtures.

15kV Switchgear Upgrade

12kV outdoor switchgear replacement with a 15kV indoor switchgear enclosed in a masonry block building. The switchgear accommodated an increase in the distribution feeders from 4 to 6. Two (2) new 12kV bays; each consisting of bus structure, a vacuum breaker, hookstick disconnects, station service transformer, PTs, a precast trench system, and riser connections. The new building was constructed on a raised platform to meet the local flood requirements.

69-34.5kV Substation

Physical, and civil structural design for the installation of a new 69-34.5kV distribution substation. The arrangement consisted of eight (8) 69-34.5kV Transformers, a 69kV ring bus configuration with sixteen (16) 69kV disconnect switches, ten (10) 69kV breakers, eight (8) 34.5kV switchgear line ups, and a control building to house station service panels, battery systems, and all protective relaying components, panels, and communications.