Humpback Creek Power Plant Fire Rebuild
Cordova Electric Cooperative, Cordova, Alaska
Humpback Creek is a remote plant connected electrically to the Cordova Electric Cooperative system. The plant has over 100’ of head, and three units, with a plant capacity of over 1 MW. The plant had a fire in late 2005, with significant damage resulting from the heat, flames, and smoke. Engineered Solutions Group, Inc. (ESG) was hired by the owner to design, procure, and reconstruct the plant. The project scope included electrical design and construction, general building construction, hydraulic system design and construction, and control/communications design and construction. ESG personnel performed all of the work on the project. The design was completed and a conformed set of drawings provided to the owner. The construction was bid and performed under a separate construction contract based on the conformed set of drawings. The owner is pleased with the work, and ESG is in negotiations for additional work at the forebay with the owner following the completion of the power plant rebuild.
Main Generator Relay Upgrades
Alyeska Pipeline Service Company, Valdez, Alaska
In order to more reliably operate the power production facility at the Valdez Marine Facility, Alyeska Pipeline Service Company (APSC) decided to upgrade and install new microprocessor-based protective relays in the three main turbine generators at the Valdez Marine Terminal power plant. Electric Power Systems (EPS) acted as the design resource and Electric Power Constructors (EPC) as the contractor to perform the installation. EPS performed the overall project and construction management, as well as all of the electrical design. EPC personnel performed the installation tasks working with Alyeska personnel. The relays have been in operation since 2003 without any outages associated with the installation.
Snake River Power Plant
Nome Joint Utility System, Nome, Alaska
The Snake River Power Plant project consisted of feasibility studies, site selection, conceptual design, final design, construction, construction management and testing services and final acceptance testing for the 30 MW diesel power plant located in Nome, Alaska. The project consists of the design and installation of a 30 MW plant (12 MW installed) to serve the community of Nome, Alaska. The project includes site design, building design (25,000 sq. ft. facility), utility interconnections, SCADA/automation design, protective relaying design, switchgear design, construction and installation, coordination studies, fuel tank and fuel delivery systems design and installation and project commissioning and testing.
The project is located at a remote site on the Seward Peninsula, in Nome Alaska. Nome has no road connection to the rest of Alaska, and is served only during the summer by barge. The plant, when commissioned, will serve as the primary power source for the communities, and the surrounding area.
During the course of the project, where the Board did not receive bids that were responsive, either from a cost or capabilities perspective, they have turned to the ESG Companies to assist in the construction. Subcontract portions that have been performed by ESG Companies, include the electrical rough in (subgrade conduit), medium voltage switchgear installation, power transformer installation, all medium voltage plant work (480V through 15kV class equipment), PLC control/ SCADA installation and electrical system startup and commissioning.
Unalaska Power Plant
City of Unalaska, Unalaska, Alaska
The Unalaska Power Plant project consisted of feasibility studies, site selection, conceptual design, final design, construction and testing services and final acceptance testing for the 22 MW diesel power plant located in Unalaska, Alaska. The project consists of the design and installation of a 22 MW plant to serve the City and processors located in Unalaska, Alaska. EPS was an integral partner with the City from the conceptual design stage throughout the project, including start-up, quality control and commissioning services for the switchgear, distribution interconnection, cutover from old plant, engineer controls and plant start-up. The project is located at a remote site on the Aleutian Islands, in Unalaska, Alaska.
Kodiak Generator Replacement
Kodiak Electric Association, Kodiak, Alaska
Kodiak is an island community that is electrically isolated from any other system. The community runs predominantly on diesel and hydropower. The diesel plant, which provides the majority of the peaking and emergency energy for the community, consists of four large diesel machines. During a four month period, two of the engines experienced catastrophic failure. The project consisted of completing a design for the selection and installation of two new units, including mechanical, electrical, and civil. Following completion of the design and acceptance by the Owner, the construction phase of the project commenced with Power Builders personnel performing the civil/structural portions, the mechanical portions being contracted to CRL Services, and EPC doing the majority of the electrical installation, in conjunction with KEA personnel.
Kapaia Power Station System Studies
Kauai Island Utility Cooperative, Kauai, HI
EPS conducted a review of system disturbances on the Kauai system in an effort to improve system reliability and response of the system to transmission faults and generator trips. EPS developed a model of the KPS turbine which replicated the undesirable response to these disturbances. EPS recommended a change to the unit control system and worked with KIUC to implement the change and provide an updated model to KIUC. The change has dramatically improved the system stability and has resulted in increased reliability to KIUC customers.