The invention relates to a device (100, 200) for collecting the kinetic energy of a naturally moving fluid, that comprises: a first conversion means (112, 212) capable of converting the fluid movement into a driving movement for driving a pumping or compression means (116, 216); a pumping or compression means (116, 216) driven by the first conversion means (112, 212), said pumping means being capable of collecting a current from the fluid and of circulating the same and conveying it to remote energy storage (223) or conversion (121, 122, 221, 222, 226) means. The pumping or compression means include a multicellular centrifugal pump having a rotation axis that is parallel or substantially parallel to the current direction. The combination of these means provides for a quasi-continuous electric energy with a fixed and stable frequency.
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