HPP Grand Coulee John W. Keys III, USA

Largest automation order for ANDRITZ Hydro

In April 2019, the United States Bureau of Reclamation awarded the Grand Coulee John W. Keys III major automation modernization contract to ANDRITZ.

© ANDRITZ

This award marks another milestone between the Bureau of Reclamation and ANDRITZ. We have been continuously working in various powerhouses at the Grand Coulee Dam for over 20 years with turbine and generator rehabilitations with great success.

Located on the Columbia River, and as the centerpiece of the Columbia Basin Project, Grand Coulee Dam is the largest hydropower facility in the United States with 33 units in four powerhouses and total capacity of 6,809 MW. The facility also supplies water for the irrigation to 2,700 km2 (270,000 hectares) of farmland.

Under this new contract, ANDRITZ will modernize the entire automation systems at the John W. Keys III pump-generating plant with new digital excitation systems, protection relays, unit controls and turbine governor systems for all the six pumping units and the six pump-generating units. The existing units were installed in the early 1950's (pumping units) and the late 1970's (pump-generating units) respectively with electro-mechanical or analogue controls. Spare parts for these old systems are no longer available and the maintenance are becoming more and more challenging.

The new systems will enable completely automated control and monitoring processes, taking advantage of the most advanced computerized data acquisition and control technologies. Contract also comprises the complete removal of the existing systems including the cable and cable tray/raceways, as well as the installation, commissioning and testing of the new systems. The first outage will start in November 2020 and the last two units will be completed in March 2026.

This order is the largest automation order for ANDRITZ Hydro in history and marks also an important step into the North American hydro automation market.

TECHNICAL DATA

Total output: 6.809 MW 
Output Scope:623 MW
Head:90 m
Speed:200 rpm
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