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Chester Lake & Purple Lake Hydro Plants Governor and Unit Control Upgrades

Plants Location:
Metlakatla, AK

Metlakatla Power & Light
P.O. Box 359
3.5 Mile Airport Rd
Metlakatla, AK 99926    

Project Description:
Metlakatla is located on Annete Island in Southeast Alaska. Metlakatla Power & Light (MP&L) provides electric utility services to the community. Operationally, the utility is an “islanded” utility. Therefore, with this project MP&L wished to upgrade their two hydro plants to provide optimal and stable response during normal and transient operations, and to add the ability for isochronous operation at both plants, and isochronous load sharing among the three units at the Purple Lake plant.

The turnkey project awarded to L&S Electric included the governor and unit controls modernization for the single impulse unit at the Chester Lake Hydro Plant and the (3) Francis units at the Purple Lake Hydro Plant. The supplied equipment consisted of GE RX3i PLC-based hardware designed and tested to C37.90 compliance standards, and new hydraulic systems. Ensuring the success of the project, L&S Electric executed the project providing the project management, engineering, design, complete integration engineering with hand markup of customer’s drawings, installation and commissioning and training at each plant.