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Wells Dam diagnostic measurements (2002 - 2004) Plant size - 840 MW |
In late September and early October 2002, diagnostic and comparison flow measurements were conducted at Wells powerhouse Unit 3 using a transportable acoustic scintillation flow meter (ASFM) and a previously installed acoustic time-of-travel instrument (AVM). As a result of these comparative measurements, the District purchased the ASFM and a plan to assess the performance of all units in the plant was formulated. Publication presented at WaterPower XlV 2005 |
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Wells Dam performance testing of all units |
The planned program consisted of testing two units each year over five years for the purpose of developing performance baselines and for optimizing Kaplan cams for all units. In late 2004, full flow measurement performance tests were completed on Units 3 and 4, and with two units tested every year after that, the testing of all 10 units was completed in 2008. Following these performance tests a regular cycle of flow measurement and absolute performance testing continues. Based on these tests, individual unit performance is optimized by tuning the Kaplan wicket to blade cam relationship, known performance is used in dispatching units, and more accurate flow measurements are used to improve the coordination of Mid-Columbia river system operations. In addition, a regular program of periodic performance testing on the ten units continues and is used to monitor trends in performance. |
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