Control of a heliostat field in a solar energy plant

摘要

PCT No. PCT/IL96/00018 Sec. 371 Date Dec. 19, 1997 Sec. 102(e) Date Dec. 19, 1997 PCT Filed Jun. 17, 1996 PCT Pub. No. WO97/01030 PCT Pub. Date Jan. 9, 1997Control of a heliostat field (1) in a solar energy plant is provided with a system (6) which controls the alignment of heliostat mirrors (2) in a controlled area of the heliostat field (1) with respect to a selected zone in a target plane (P). The control system (6) comprises a detection device (7) removed from the target plane (P) in the direction of propagation of radiation (R') directed by the heliostat mirrors towards the target plane (P). The detection device (7) has a detection surface (8) facing the radiation (R'). The control system further comprises first means (9) capable of projecting on the detection surface (8) concentrated solar radiation delivered to the selected zone from the controlled area of the heliostat field (1) to produce thereon an image of the controlled area, second means (12) associated with the detection device for measuring separately the light intensity of portions of the image and third means for adjusting each heliostat mirror (2) in the controlled area in response to such measurements.