Heliostat calibration system of solar power station and calibration method

A calibration system and heliostat technology, applied in the field of solar power generation, can solve the problems of slow calibration of the heliostat calibration system, etc., and achieve the effects of fast calibration action, improved calibration accuracy and small mechanical error

Inactive Publication Date: 2014-04-30
深圳市联讯创新工场科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention lies in the slow calibration action of the existing heliostat calibration system, and provides a heliostat calibration system capable of high calibration accuracy, fast calibration speed and low operating cost at the same time.

Method used

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  • Heliostat calibration system of solar power station and calibration method
  • Heliostat calibration system of solar power station and calibration method
  • Heliostat calibration system of solar power station and calibration method

Examples

Experimental program
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Effect test

Embodiment 1

[0046] figure 2Shown is a heliostat calibration system for a solar power plant, which includes a receiver 1 mounted on a support tower 9 that receives sunlight reflected by a heliostat 2 to directly generate steam or electricity; The height of the receiver 1 from the ground ensures that all the heliostats 2 in the heliostat field can be reflected onto the receiver 1 .

[0047] It also includes a heliostat field installed around the receiver; the heliostat field includes at least one heliostat 2; the heliostat 2 is configured with two rotation axes, and the heliostat 2 revolves The rotating shaft performs pitching rotation and panning rotation; the dual rotating shafts are equipped with angle sensors, which are used to accurately measure the actual pitching angle that the two rotating shafts rotate through and the pan angle ω. The heliostat 2 tracks the moving sun by adjusting the orientation of the mirror, so that the sunlight is continuously reflected to the receiver 1 . ...

Embodiment 2

[0074] Figure 7 Shown is the heliostat calibration system of this embodiment. The difference between this calibration system and the calibration system in Embodiment 1 is that there is one image sensor in this embodiment, which is installed on the plane mounting bracket 10. It moves horizontally along the plane mounting bracket 10 and can move up and down along with the plane mounting bracket 10 . The moving range of the planar mounting bracket 10 , that is, the collecting range of the image sensor is isolated from the receiving range of the receiver 1 .

[0075] When the error of the heliostat is small, it is only necessary to calibrate the pitch angle and pan angle error of the heliostat. In this embodiment, the error that needs to be calibrated is: the pitch angle and the pan angle error of the heliostat, and the calibration process of the heliostat calibration system includes the following steps:

[0076] a. The control unit first controls the rotation of the heliostat ...

Embodiment 3

[0085] Figure 8It is the calibration system in this embodiment, which is basically the same as the calibration system in Embodiment 1, and its difference is that: the image sensor groups are 3 groups, which include the installation bracket 4 installed in the field of the heliostat Two groups of image sensors move up and down along the mounting bracket 4 . It also includes a group of image sensors installed on the plane mounting bracket 10, the plane mounting bracket 10 is located on the support tower 9 of the receiver 1, the image sensors are arranged in the horizontal direction, and they are arranged with the plane mounting bracket 10 Moving up and down. In this embodiment, the three groups of image sensors can calibrate image sensors in different areas within the heliostat field.

[0086] In this embodiment, the errors that need to be calibrated are: pitch angle and pan angle Non-perpendicularity η of two rotation axes 0 , the spatial position (x, y, z) of the mirror c...

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Abstract

A calibration system for a heliostat in a solar power station and a calibration method for the calibration system. The calibration system comprises: a receiver (1); a heliostat field mounted around the receiver (1); an image sensor group for capturing and calibrating a reflected light spot irradiated on a heliostat (2) by a light source; and a control unit. The image sensor group is movably arranged in the heliostat field. The control unit controls rotation of the heliostat (2), so that a reflected image of the heliostat (2) falls in a collection range of the image sensor group, the image sensor group moves to obtain a central position of a light spot reflected by the heliostat (2), and finally an error value required for calibration of the heliostat (2) is obtained. In the calibration system, the image sensor group moves to determine the central position of the reflected light spot of the heliostat, the calibration action is quick, the mechanical error is small, and the calibration accuracy is improved.

Description

technical field [0001] The invention belongs to the field of solar power generation, and in particular relates to a heliostat calibration system and a tracking method of a solar power station. Background technique [0002] In a central tower receiver power plant, the receiver on top of the tower receives sunlight reflected from the heliostat array. The receiver converts the incident radiant energy to output high-pressure, high-temperature steam, which can then be sent to a turbine for electricity generation. Heliostats are generally installed on the ground around the tower. Each heliostat has a rigid reflective surface to track the sun, and the surface is oriented to the sun during the day to keep reflecting moving sunlight to the receiver. Highly accurate tracking of the sun is required to reduce reflected light spilling around the receiver. Therefore, providing a heliostat calibration system capable of accurately tracking the sun and achieving less loss has become an ur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D3/12G01B11/00
CPCF24J2002/1076F24J2002/385F24J2/38Y02E10/47F24S50/20F24S2023/87F24S2050/25
Inventor 孙海翔朱亮许迪窦新国王威钟强
Owner 深圳市联讯创新工场科技开发有限公司
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