Heliostat mounting and transmission error calibration system and method
A technology of transmission error and calibration system, applied in the field of solar energy applications, can solve the problem of time-consuming and laborious heliostats, and achieve the effects of increasing calibration efficiency, improving calibration efficiency, and preventing irradiation interference.
Active Publication Date: 2019-06-14
XIAN MICROELECTRONICS TECH INST
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Problems solved by technology
Due to the large number of heliostats, ranging from thousands to tens of thousands, manually calibrating the motion error of each heliostat is a time-consuming and laborious work, and an automatic error calibration method is very necessary
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[0042] The present invention is described in further detail below in conjunction with accompanying drawing:
[0043] Such as figure 1 with figure 2As shown, each heliostat 1 has two degrees of freedom of motion, pitch and horizontal rotation, and the pitch and horizontal rotation are associated with two single-turn absolute value type rotary encoders respectively, and each heliostat 1 is opposite to Since the absorption tower 2 has a definite orientation, each heliostat 1 also has a set of orientation calculation unit and servo drive unit, the servo drive unit is used to drive the rotation of the heliostat 1 in the horizontal and pitch directions; the orientation calculation unit It is used to calculate the azimuth angle of the heliostat 1 at different times and output the information to the servo drive unit at the same time. During the calibration work process, the orientation settlement unit regularly reads the readings of the angle encoder and saves it, and the input end...
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The invention discloses a heliostat mounting and transmission error calibration system and method. The system comprises an absorption tower, a calibration pulse unit, a heliostat and a central controlcomputer; multiple groups of photoelectric receivers uniformly distributed at one circle of the circumference of the absorption tower are arranged on the absorption tower; each group of photoelectricreceivers comprise multiple vertically arranged pitch receivers and revolving receives arranged in vertical; the pitch receivers and the revolving receivers are connected with the calibration pulse unit; a calibration timer and a processor in interactive connection are arranged at the calibration pulse unit; the processor and the central control computer are interactively connected; a laser emitter, an azimuth resolving unit, an angular encoder and a servo driving unit are arranged at the heliostat, and the laser is vertical to a mirror surface; the servo driving unit is used for driving therotation of the heliostat on a horizontal direction and a pitch direction; the azimuth resolving unit is used for reading the angular encoder at fixed time and saving the reading; the azimuth resolving unit is connected with the servo driving unit; and the central control computer is connected with the azimuth resolving unit. The automatic calibration of the heliostat is realized.
Description
technical field [0001] The invention belongs to the field of solar energy applications, and relates to a calibration system and method for heliostat installation and transmission errors. Background technique [0002] Tower-type solar thermal power plants use reflectors (heliostats) to reflect sunlight and gather it at one point to form a local high temperature, heat a suitable working medium at high temperature, and then generate high-temperature and high-pressure water vapor to drive a steam turbine to generate electricity. [0003] As the sun moves, the angle of the heliostat needs to be constantly adjusted so that the reflected sunlight always converges on the top of the absorption tower. A large number of heliostats are arranged around the absorption tower, and each heliostat can independently perform two degrees of freedom of rotation and pitch, so that it can point to any direction in space. Associated with a degree of freedom of movement or used to determine the posi...
Claims
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Inventor 徐宏坤贺占庄杨乐
Owner XIAN MICROELECTRONICS TECH INST