Kaplan Blade Angle Controllerby Judy Stromquist, US Army Corps of Engineers, Portland, OR, USA,
Tom Thorsen, US Army Corps of Engineers, Portland, OR, USA,
Abstract: This paper describes a recently developed computerized Kaplan blade angle controller that is capable of improving turbine performance. Model Tests or Index Tests produce the Three-D-Cam curves that show the relationship between wicket gate position and blade angle over a range of head values and are used as a guide for efficient operation. The mechanical-electronic blade angle controller described can be used when blade position follows gate position through a cam and cam follower. The controller consists of a mechanical default, a linear actuator, transducers and the data acquisition/control unit. Primary control is through the mechanical default, but error in the blade position is minimized through the use of the linear actuator under program control.
Subject Headings: Data processing | Model tests | Linear functions | Data collection | Turbines | Hydraulic design | Hydrologic data
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