A number of published works deal with govemor tuning for speed control of hydrogenerators. This work is based on the hypothesis that some system parameters are not known at the design stage. It develops a graph which can be used to predict optimum proportional and integral gains based on four parameters: the time constants of the water column and of the rotor inertia and the selfregulation constants of the turbine and of the loading grid. The pole cancellation method of design is used and the results are posed in an easy-to-use format not requiring the solution of systems of equations. Infolimition on stability limits and comparisons with other work are included.Kev W o r a :
This paper describes the development and testing of a digital gain switching govemor for hydrogenerators. Optimal gains were found at different load points by minimizing a quadratic performance criterion prior to controller operation. During operation, the gain sets are switched in depending on gate position and speed error magnitude. With gain switching operating, the digital govemor was shown to have a substantial reduction of noise on the command signal and up to 42% faster responses to power requests. Non-linear control strategies enabled the digital govemor to have a 2.5% to 2% reduction in speed overshoot on startups, and an 8% to 1% reduction in undershoot on load rejections as compared to the analog
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.