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Heliostat calibration method and system for solar power station

A calibration method and calibration system technology, which is applied in the field of solar power generation, can solve the problems of low calibration efficiency and low calibration accuracy, and achieve the effects of high calibration efficiency, high calibration accuracy, and small mechanical errors

Inactive Publication Date: 2012-06-13
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 problems of low calibration efficiency and low calibration accuracy of the existing heliostat calibration method, and further provides a heliostat calibration method of a solar power station that determines the number of calibration errors according to the size of the error

Method used

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

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Embodiment 1

[0062] 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 .

[0063] 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

[0095] 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:

[0096] The calibration light source in this embodiment is artificial light source 7 . The artificial light source 7 is arranged on the receiver 1 . As another possible implementation mode, the artificial light source can also be set on the movable image sensor 3, such as Figure 9 shown. In this way, even if a large number of heliostats irradiate the reflected light spots on the image sensor group, the total energy will be much lower than that of sunlight as the calibration light source. There is no need for the above-mentioned dimming devices with widely varying degrees of dimming.

Embodiment 3

[0098] Figure 10 It is the calibration system in this embodiment, which is basically the same as the calibration system in Embodiment 1, the difference is that:

[0099] The image sensor The image sensor 3 is mounted on a rotating mounting bracket 8, the rotating mounting bracket 8 can rotate around the support tower 9 of the receiver 1, the image sensor group is arranged vertically, and it is connected to the The rotating mounting bracket 8 rotates around the supporting tower 9 at the same time. The control unit obtains the central position of the light spot reflected by the heliostat through the rotation of the image sensor group.

[0100] 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

The invention discloses a heliostat calibration method for a solar power station. The heliostat calibration method comprises the following steps of: obtaining a deviation ei between a heliostat reflective light-spot center position and a receiver center through the movement of an image sensor, and controlling a heliostat to rotate to a nominal position; comparing the distance deviation ei with a set deviation value di so as to judge the deviation size of the heliostat; when the deviation of the heliostat is smaller, just calibrating fewer calibration errors; and when the deviation of the heliostat is larger, then calibrating more calibration errors. The invention further discloses a heliostat calibration system using the calibration method. According to the heliostat calibration method and the heliostat calibration system, disclosed by the invention, the image sensor is used for determining the heliostat reflective light-spot center position, so that the calibration action is fast, the mechanical error is small and the calibration precision is improved. Furthermore, according to the heliostat calibration method and the heliostat calibration system, disclosed by the invention, the calibration is carried out in a manner of determining calibration parameters through firstly judging the deviation size of the heliostat, so that the calibration efficiency and the calibration precision are improved.

Description

technical field [0001] The invention belongs to the field of solar power generation, and in particular relates to a heliostat calibration method and a calibration system 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, it is an urgent technical problem to be solved by those skilled in the art to provide a heliostat calibration system ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D3/12G01B11/00F24S50/20
CPCF24J2002/385G02B7/198Y02E10/41G05D3/12F24J2/38F24J2/07G01B11/00G01M11/005G02B7/183Y02E10/47F24S20/20F24S2050/25Y02E10/40
Inventor 许迪孙海翔朱亮窦新国王威李庆松钟强刘泉张腾涛吴新淼魏政刘诗涵孙天启
Owner 深圳市联讯创新工场科技开发有限公司
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