Generator Inertia for isolated Hydropower system.pdf

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Generator inertia for isolated hydropower systems J. L.

GORDON AND

D. H.

WHITI\IAN

Monenco Consultants Limited, P.O. Box 6088, Station A, Molllreal, P.Q .. Canada HJC 3Z8 Received January 17, 1985 Revised manuscript accepted August 7. 1985 Speed regulation of hydroelectric power plants of isolated systems is a complex subject, which is now becoming more important as customers install computers, stereophonic equipment, and advanced satellite dish electronic equipment in such systems. This paper presents a methodology for determining hydroelectric generator inertia, based on theoretical analysis, coupled with a review of data from over 50 hydroelectric projects with units having capacities between 2 and 300 MW. The parameters that affect generator inertia-system size, allowable frequency variation, type of load, turbine and governor. water column start time, governor time, and relief valve operation- are all discussed. A chart combining these parameters is developed. on which data from hydro projects is plotted. From an analysis of the plotted data, an empirical equation is developed for the generator inertia as a function of the aforementioned parameters. Key words: hydroelectric power, generator inertia, speed regulation, hydro design. La regulation de vitesse des centrales hydroelectriques fais ant partie des systemes isoles est un sujet complexe, qui devient maintenant plus important avec !'installation par les clients des ordinateurs , des equipements stereophoniques et des antennes paraboliques pour reception par satellite sur de tels systemes. Cet article presente une methodologie pour determiner l"inertie des altemateurs basee sur des analyses theoriques et des donnees de reference de plus de 50 projets hydroelectriques avec des unites d'une puissance de 2 a 300 MW. Les parametres affec rant l'inertie des altemateurs. tels que Ia grandeur du syst