Counterglow tracking method and tracking system for disc type solar thermal power generation system

The invention discloses a counterglow tracking method for a disc type solar thermal power generation system, comprising the following steps of: 1) acquiring solar image information, and analytically processing the solar image information by software, to obtain the position of the sun; 2) detecting the position of a spotlighting disc, and obtaining the deviation between the spotlighting disc and the sun light ray according to the position of the sun and the position of the spotlighting disc; and 3) controlling the position of the spotlighting disc of the disc type solar thermal power generation system according to the deviation, so that the light ray of the sun light is reflected by the spotlighting disc to be completely focused. The counterglow tracking method realizes the offset correction of the error according to the sequence such as obtaining the solar image information, obtaining the position of the sun and the position of the spotlighting disc, computing the deviation, controlling the action of the spotlighting disc according to the deviation, so that the accumulated error when the spotlighting disc runs can be eliminated, and the exact tracking of the sun can be realized.