PROCESS AND DEVICE FOR LIMITING THE OVERSPEED OF A LOW HEAD HYDROELECTRIC GENERATING SET

摘要

This invention relates to a process for limiting the overspeed of a low head hydroelectric generating set with adjustable distributor valve and vanes, such as a bulb generating set with mobile distributor and mobile vanes. It consists in limiting the opening of the distributor for each of the vanes in accordance with the law of limitation merged with a determined law of conjugation vanes/valve assembly in normal operation, said law of conjugation being relative to a pressure head lower than the minimum pressure head, the margin being some percent in relative values.