EPS completed the design and construction inspection of the new Woodinville BP/Olympic station near Bothell, Washington. The substation consisted of four 4.16 kV feeders in metal-clad switchgear. The construction and commissioning of the substation was required to be completed within a single four day outage, and the design accommodated this restriction by pre-constructing a significant portion of the station prior to the outage.
EPS was responsible for the switchgear design and specifications, station layout and civil work, protective relaying settings, medium voltage and low voltage design, and arc flash calculations. EPS completed the quality control inspection, and all testing, commission, and startup for the substation construction.
EPS completed the civil, structural and electrical design for the 34.5 / 12.47 kV Airai Substation. Project included concrete block control building, relaying and control panels, four 12.47 kV breakers, installation of controls and modifications for one 34.5 kV breaker and three 34.5 kV motor-operated switches and SCADA control and monitoring for the station. EPS provided the structure design, electrical service, grounding, protective relaying and controls design. EPS completed the installation and commissioning.
Cowlitz 115/230kV Substation Bank 6 Replacement
EPS provided structural engineering to add a new bank to this existing substation. It included adding a new 230 kV, 400 MVA power transformer and new 230 kV deadend structures. Existing lattice steel deadend structures were analyzed for attaching the new bay, and steel procurement documents were developed for the new structure. The transformer foundation was designed for High Seismic Level in accordance with IEEE 693-2005.