Method and system for dynamically calibrating precision of heliostat of tower type solar thermal power generation system

Abstract

The invention provides a method and a system for dynamically calibrating precision of a heliostat of a tower type solar thermal power generation system. The method particularly comprises the steps of setting a facula calibration position track for a facula imaging device in a heliostat field, converting the facula calibration position track into the corresponding heliostat angle turning track, and controlling rotation of the heliostat according to the heliostat angle turning track; during the rotation of the heliostat, enabling a facula collecting device to collect a facula image on the facula imaging device in real time and send the facula image to an image processing device in real time to perform real-time processing, identifying an actual motion track of the facula of the heliostat, and enabling the actual motion track of the facula to correspond to a set theoretical motion track; and calculating the precision of the calibrated heliostat by combining the position information of the heliostat, wherein the precision of the heliostat passes the calibration if the precision reaches the set value. The method and the system break through the idea of statically calibrating the precision of the heliostat. The precision of the heliostat is calculated by dynamically identifying and processing the facula of the heliostat, so that calibrating efficiency of the heliostat and accuracy of results can be effectively improved.

Description

technical field [0001] The invention relates to the field of solar thermal power generation, in particular to a method and system for dynamically checking the accuracy of a heliostat for a tower-type solar thermal power generation system. Background technique [0002] The tower-type solar thermal power generation system uses a heliostat that tracks the sun in real time to reflect sunlight to the heat absorber on the tower, and heats the heat-absorbing working fluid inside to generate high-temperature and high-pressure steam to drive the turbogenerator to generate electricity. [0003] The heliostat field is an important part of the tower solar thermal power generation system, and the heliostat field usually consists of thousands of heliostats. Due to certain deviations in the mechanical structure of the heliostat during production and installation, it is difficult to accurately reflect the sun's rays to the heat sink at the beginning of the installation of the heliostat, so ...

AI Technical Summary

Problems solved by technology

Due to certain deviations in the mechanical structure of the heliostat during production and installation, it is difficult to accurately reflect the sun's rays to the heat sink at the beginning of the installation of the heliostat, so it is necessary to correct the heliostat (correction, that is, use The spot acquisition device collects the solar spot samples on the spot imaging device, and processes and analyzes them through image processing algorithms, etc., so as to continuously reduce the tracking error), and regularly checks the heliostat (checking, that is, judging the date mirror accuracy), but due to the large number of heliostats and their different states, the heliostat calibration process will inevitably be disturbed. Therefore, how to scientifically and efficiently complete the heliostat accuracy calibration has become an urgent problem to be solved

[0004] Traditional heliostat accuracy verification methods are mostly based on static spot recognition technology. This verification method is suitable for situations where the size of the mirror field is small, the shape of the mirror field is simple, the state of the heliostat is single, and the requirements for calibration efficiency are not high. For large-scale mirror fields with complex shapes, if the static calibration method is used, not only the calibration efficiency is low, but also because the states of the heliostats in the mirror field are different, the calibration process is easily disturbed by the heliostats in the non-calibration state, so The accuracy and reliability of the calibration results cannot be guaranteed

Images