Drum No. 1 Powerhouse was originally constructed and commissioned in 1913, and is considered a critical power generating asset for our client. The powerhouse is comprised of four horizontal generating units rated 18,000 horsepower each with a total installed capacity of 72,000 horsepower. The existing excitation systems have become obsolete, which has led to increasingly difficult maintenance and high costs for replacement parts and service. Loss of power generation due to forced maintenance and repairs caused by the aged excitation systems had become problematic.
The electrical team at SAGE Engineers was hired to provide electrical engineering services to develop integration design for each of the four new excitation systems at Drum 1 Powerhouse. Our client chose to replace each of the excitation systems with Basler DECS-400 static excitation systems each equipped with a Power System Stabilizer (PSS) Unit.
SAGE facilitated the design and analysis of replacing static excitation systems, circuit breakers, MV protection, disconnect switches, protective relays, current transformers, potential transformers, and controls.
Additionally, SAGE provided construction and commissioning support including description of operations, test / startup plan, and preparation of a Hydro Facility Quality Plan (HFQP) document for the newly-installed excitation systems.