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Heliostat light path closed-loop control system and method

A closed-loop control and heliostat technology, which is applied to solar heating systems, use feedback control, solar collector controllers, etc., can solve the problems that the attitude of the heliostat cannot be corrected in real time, and the control accuracy of the heliostat is high.

Active Publication Date: 2020-10-13
SHANGHAI PARASOL RENEWABLE ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above problems, the present invention aims at the characteristics of high control precision of the heliostat in the tower solar thermal power generation technology, and utilizes the light path reflection principle to realize the real-time control of the attitude of the heliostat by controlling the direction of the incident light or the direction of the reflected light, effectively solving the problem of Solved the problem that the attitude of the heliostat cannot be corrected in real time based on the feedback of the optical path in the open-loop control method, and realized a high-precision, high-efficiency, real-time closed-loop control system for the optical path of the heliostat

Method used

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  • Heliostat light path closed-loop control system and method
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  • Heliostat light path closed-loop control system and method

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Experimental program
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Effect test

Embodiment 1

[0085] Such as figure 1 As shown, the present invention is a reflective heliostat optical path closed-loop control system, wherein the receiving surface 4 of the spot sensor 1 faces the target reflecting surface 5 of the heliostat, and is used to receive the sun reflected by the reflecting surface 5 of the heliostat. spot. The sunlight is reflected and irradiates the target area 6 , a part of which is received by the receiving surface 4 of the spot sensor 1 to form a sun spot, and the actual position of the sun spot represents the actual direction 7 of the reflected light of the target heliostat. The reflective optical path closed-loop control system perceives the actual reflected light direction 7 of the target heliostat through the spot sensor 1, and corrects the attitude of the heliostat in real time according to the deviation from the expected reflected light point 8 to realize the real-time optical path of the heliostat Closed-loop control.

Embodiment 2

[0087] Such as figure 2 As shown, the present invention is a direct-type heliostat optical path closed-loop control system, wherein the receiving surface 4 of the spot sensor 1 is in the same direction as the reflecting surface 5 of the target heliostat (towards the sun at the same time). Part of the sunlight is received by the receiving surface 4 of the spot sensor 1 to form a sun image, and the rest of the sunlight is reflected to the target area 6 by the reflective surface 5 of the heliostat. The actual position of the sun image represents the actual incident light direction of the target heliostat 9 . The direct light path closed-loop control system perceives the actual incident light direction 9 of the target heliostat through the spot sensor 1, and corrects the attitude of the heliostat in real time according to the deviation from the expected incident light direction 10 to realize the real-time light path of the heliostat Closed-loop control.

Embodiment 3

[0089] The control method of the heliostat optical path closed-loop control system of the present invention is as follows:

[0090] (1) if image 3 As shown, the spot sensor 1 collects the distribution information of the sun spot or the sun image at time ti, and calculates the actual position of the sun spot or the sun image by the calculation unit 3 based on the distribution information of the sun spot or the sun image [u ti ,v ti ] n , where ti represents the i-th time point in a single working day, n represents the heliostat number, u ti Indicates the actual coordinates of the u-axis direction of the actual position of the sun spot or the sun image at time ti, v ti Indicates the actual coordinates of the v-axis direction of the actual position of the sun spot or the sun image at time ti;

[0091] (2) Computing unit Computing unit 3 calculates the desired position information [Tu of the target heliostat sun spot or sun image at ti time] ti ,Tv ti ], Tu ti Indicates th...

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Abstract

The invention discloses a heliostat light path closed-loop control system and method. The system comprises a facula inductor, a heliostat rotation controller and a calculation unit, wherein the faculainductor is fixed to a heliostat and rotates synchronously along with the rotation of a reflective surface of the target heliostat; the calculation unit is used for calculating the deviation of an actual position from an expected position of a solar facula or the deviation of an actual position from an expected position of a solar image; the heliostat rotation controller is fixed to the target heliostat; and the calculation unit and the heliostat rotation controller perform data exchange with each other, and the heliostat rotation controller and the facula inductor perform data exchange witheach other. According to the heliostat light path closed-loop control system and method, real-time control over the attitude of the heliostat is realized by controlling the orientation of incident light or the orientation of reflected light according to the light path reflection principle, the problem that the attitude of the heliostat cannot be corrected in real time based on light path feedbackin an open-loop control mode is effectively solved, and the heliostat light path closed-loop control system with high precision, high efficiency and real-time performance is realized.

Description

technical field [0001] The invention belongs to the technical field of solar thermal power generation, and in particular relates to a closed-loop control system and method for a heliostat optical path in a tower solar energy center. Background technique [0002] As the core component of the tower-type solar thermal power plant, the function of the heliostat is to reflect the sunlight irradiated on its surface to the target heat absorber area. Since the sun keeps changing its position with time, the heliostat needs to have sufficient control precision to ensure that the pointing accuracy of the reflected light meets the design requirements, that is, the sunlight reflected by the heliostat can continuously and accurately irradiate the target heat sink area, so as to ensure the concentration efficiency of solar energy in the receiver area and the working efficiency of the solar thermal power station. [0003] The existing heliostat control method is based on open-loop control,...

Claims

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Application Information

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IPC IPC(8): F24S50/20G05D3/12
CPCF24S50/20G05D3/12Y02E10/47
Inventor 陈煜达陈昊孙楠沈平
Owner SHANGHAI PARASOL RENEWABLE ENERGY CO LTD
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