Heliostat tracking error correction method

A correction method, tracking error technology, applied in the direction of control using feedback, etc., can solve the problem of high cost

Inactive Publication Date: 2010-07-14
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

But the cost of correcting the tracking error with this method is much higher than the cost of correcting the tracking error with the method of US Patent 4,564,275

Method used

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  • Heliostat tracking error correction method

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Embodiment Construction

[0038] As shown in Fig. 1, the control system of the present invention includes an overall field control system, a heliostat field control system, a heliostat control system, and an image acquisition and processing system.

[0039] The main function of the whole field control system is to send control instructions to the heliostat field control system according to the working status of the heat absorber, heat storage device, steam turbine and other equipment in the tower solar thermal power station, and determine through the heliostat field control program The working status of each heliostat coordinates the working relationship between the heliostat field and other functional modules.

[0040] The heliostat field control system includes an upper monitoring computer and a high-performance controller for controlling the heliostat field control. The heliostat field control system determines the working status of each heliostat according to the requirements of the field control s...

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Abstract

The invention discloses a heliostat tracking error correction method. Based on the characteristics that a heliostat tracking deviation angle has small variation in a short time and the tracking deviation angles at the same moment in the adjacent days have small variation, an image collecting and processing system is adopted to detect and obtain the tracking deviation angles of a certain heliostat at multiple moments in the whole day, or the tracking deviation angles obtained by the heliostat at multiple moments in one day or previous days are taken as the intraday tracking deviation angle; an intraday tracking deviation curve of the heliostat is obtained by the interpolation; according to the tracking deviation curve, the current angle of the heliostat is corrected to ensure that the facula of the heliostat can basically accurately be projected to a target position. The invention obtains the tracking deviation angles at multiple moments by detection of heliostat tracking error many days a year or many times a day; the everyday corresponding tracking deviation curve of each heliostat can be found by one-year or multiple-year tracking deviation angle data analysis treatment and curve fitting; and thus, the facula of the heliostat can be projected to the target position more accurately.

Description

technical field [0001] The invention relates to a method for correcting the tracking error of a heliostat used in a tower-type solar thermal power generation system. Background technique [0002] The working principle of the tower solar thermal power station is: through the heliostat, the sunlight is concentrated and reflected to the heat absorber installed on the high tower to generate high temperature, and the high temperature is used to heat the working medium to generate electricity. Improving the tracking accuracy of heliostats is an important research topic in the field of tower solar thermal power generation. [0003] The current position of the heliostat can be accurately calculated through astronomical formulas, and the calculation accuracy can be very high. For example, the sun formula published by Ibrahim Reda in Solar Energy Magazine Issue 76 in 2004 has an accuracy of three ten-thousandths of a degree. However, in the process of manufacturing, installing and op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D3/12
Inventor 梁文峰王志峰闫忠孙飞虎王晓宇
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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