Client: Bonneville Power Administration
Location: The Dalles, Oregon
Bonneville Power Administration’s Celilo HVDC converter station was upgraded with a new converter to support the future overall rating increase in the Pacific DC Intertie. POWER, contracted to perform owner’s engineering, worked with TransGrid Solutions (TGS), a leading HVDC technology subcontractor, to provide detailed analytical support and HVDC expertise.
- Located at the north end of the Intertie the station previously had an operating capacity to transmit 3,100 MW of power, and now has a terminal rating of 3,800 MW at +/- 560 kV HVDC.
- The Celilo high voltage direct current (HVDC) converter station, located near the Columbia River, is an important part of the electricity link between the Pacific Northwest and Southern California that was commissioned in 1970.
- Supported BPA in assembling a comprehensive business case evaluating two project alternatives to justify project funding
- Developed complete technical specifications for the new converter station
- Supported BPA in the vendor proposal review and with procurement
- Performed AC and DC system studies
- Post award activities include reviewing design documents, factory testing, systems design studies review and commissioning testing
- RTDS simulations (with TGS) support as required
- Performed AC system harmonic impedance studies for the new set of AC harmonic filters and other balance of plant changes
- Old converter was replaced with state of the art HVDC technology. POWER, a key player in developing HVDC systems in the U.S., was pivotal in helping BPA select a “best value purchase” for this significant undertaking and investment.
- The upgraded converter station improves reliability and maintainability for homes in the greater Los Angeles Area.
- The station was energized on time in 2016 and on budget, with a value of $498 million in upgrades.