Calibration of heliostats of thermo-electric solar energy plant
A technology of heliostats and solar energy, applied in solar thermal power generation, solar thermal energy, solar collectors, etc., can solve the problems of reduced frequency of recalibration, increased working hours, etc., and achieve the effect of uniform flux
Active Publication Date: 2018-07-17
ABENGOA SOLAR NEW TECH SA
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[0006] On the other hand, the most commonly used calibration method for current commercial thermoelectric solar power plants (eg PS10: 624 heliostats, PS20: 12550 heliostats, PS50: 4120 heliostats) with a central receiver located on the tower Operator involvement required
Therefore man-hours will increase proportionally to the total number of heliostats in the factory and likewise the frequency of recalibration will decrease
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[0128] Calibration system for a thermoelectric solar power plant with a central receiver located on a tower (the plant may include one or more towers), the plant may include a field of heliostats including at least one heliostat Mirrors (structures formed from reflective surfaces to track the position of the sun in two axes (elevation and azimuth)) and at least one aiming point preferably located in the tower and focusing the solar radiation reflected by the heliostats . Preferably, the aiming point is located on a solar receiver that has reached a high temperature. In this specification, the plant includes a tower and a plurality of heliostats (eg, ten heliostats).
[0129] In addition, the plant may include multiple imaging devices (e.g., video cameras or cameras or a combination of both), each of which is configured to respond at a given time (e.g., 0.5 seconds ≤ t capture ≤ 10 minutes) to capture an image of a field of heliostats arranged to receive the attenuation of so...
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The invention relates to a method for calibrating a heliostat of a field of heliostats, comprising the following steps: providing a linear transformation to convert three-dimensional coordinates intotwo-dimensional coordinates in pixels in an image; obtaining the actual three-dimensional coordinates of the corner points of the reflective surface of each heliostat, for an image captured by a firstimage-capturing device and an image captured by a second image-capturing device at a determined time; obtaining the two-dimensional coordinates of the corner points of the reflective surface; identifying the contour of the reflective surface of each heliostat in each image; and identifying an ROI in each image. As well as, for each selected heliostat, obtaining a first parameter of the intensityof the pixels of the ROI corresponding to the heliostat in the image captured by the first device; obtaining a second parameter related to the intensity of the pixels of the ROI corresponding to the heliostat in the image captured by the second device; determining adjustments to be applied to the heliostat; and applying the adjustments.
Description
[0001] This disclosure relates to the calibration of heliostats for a thermoelectric solar power plant with a central receiver on a tower, and more particularly to heliostats for calibrating said thermoelectric solar power plant with a central receiver on a tower Methods, systems and computer program products for heliostats in a mirror field. Background technique [0002] In the prior art, thermoelectric solar power plants are known with a central receiver located on a tower, comprising a field of heliostats, wherein at least one heliostat (formed by a reflective surface to track the sun in two axes (elevation and azimuth) The structure at the location on ) reflects solar radiation on an aiming point, usually on a receiver at the top of the tower, which is brought to high temperature in order to heat the fluid or heat transfer material. [0003] Regarding these plants, some methods are known for calibrating heliostat fields. [0004] The first method is based on the temporal ...
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IPC IPC(8): F24S50/20
CPCF24S50/20F24S2050/25Y02E10/47
Inventor P·克利芒·桑切斯M·施拉姆I·昂纳·埃斯卡特利亚尔
Owner ABENGOA SOLAR NEW TECH SA