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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 complex calibration action of the heliostat calibration system, and achieve the effects of fast calibration action, small mechanical error and high efficiency

Inactive Publication Date: 2014-09-24
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 is that the calibration action of the existing heliostat calibration system is complicated, and a heliostat calibration system capable of high calibration accuracy, fast calibration speed and low operating cost of the solar power station is provided.

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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Embodiment 1

[0049] figure 2 Shown 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 .

[0050] 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

[0079] Figure 8 Shown is the heliostat calibration system of this embodiment. The difference between this calibration system and the calibration system in Embodiment 1 is that the heliostat field in this embodiment is located at one side of the receiver 1 . The image sensor group is fixedly mounted on a fixed mounting bracket 7 around the receiver 1 . The collection range is all the reflected light spots of the heliostat that do not irradiate the receiver 1 . The image sensors are evenly arranged on the fixed mounting bracket 7 , and in this embodiment, the image sensors are evenly arranged vertically and horizontally.

[0080] 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 errors that need to be calibrated are: the pitch angle and pan angle of the heliostat error, the calibration process of the heliostat calibration system includes the following steps:

[0081] a. Th...

Embodiment 3

[0088] Figure 9 It is the heliostat calibration system in this embodiment, which is basically the same as the calibration system in Embodiment 1. The difference is that the image sensor 3 is mounted on the rotating mounting bracket 8 so that it can move up and down, and the image sensor 3 Arranged along the horizontal direction and its collection surface is set facing the receiver 1 , the rotating mounting bracket 8 can rotate around the supporting tower 9 of the receiver. The control unit obtains the central position of the light spot reflected by the heliostat through the up and down movement and rotation of the image sensor group.

[0089] The heliostat is equipped with two rotation axes X-axis and Y-axis parallel to the horizontal plane, and the heliostat performs pitch rotation around the two rotation axes respectively; the two rotation axes are respectively equipped with angle sensors for It is used to accurately determine the pitch angle through which the two rotation...

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Abstract

A heliostat calibration system and calibration method of a solar power station, the calibration system comprising: a receiver (1), a heliostat field mounted around the receiver (1), an image sensor group for capturing the image of a reflected light spot irradiated onto a heliostat (2) by a calibration light source, and a control unit for processing the image information obtained by the image sensor group, calibrating the parameters of the heliostat (2) tracking the sun, and controlling the rotation of the heliostat; an image sensor (3) is disposed on the heliostat field, so that the reflection image of the heliostat (2) reflected outside the receiver (1) falls into the acquisition range of the image sensor group; the control unit obtains the central position of the light spot reflected by the heliostat (2) via the image information of the image sensor group, thus obtaining the to-be-calibrated error value of the heliostat (2). The calibration system determines the central position of the light spot reflected by the heliostat via the movement of the image sensor group, with quick calibration action and slight mechanical error, therefor improving calibration accuracy.

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
CPCF24J2002/385G01B11/00F24S2050/25
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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