Sun-tracking sensor based heliostat device and operating method thereof

Abstract

The invention discloses a sun-tracking sensor based heliostat device and an operating method thereof, and belongs to the technical field of solar energy heat collecting. The sun-tracking based heliostat device comprises a sun-tracking sensor, a sun-facing bracket, a gear assembly, a spinning elevation type heliostat, a spinning axis and a controller, and is characterized in that the spinning axis is aligned with a light target, the gear assembly is installed on the spinning axis, the conversion from a normal vector of the spinning elevation type heliostat to a sun vector is realized according to a transmission ratio of 2:1, then the sun is aligned by the aid of the sun-tracking sensor, and thus heliostat closed-loop control with an angle encoder and a sun position algorithm is realized, so that the control system is greatly simplified. In the practical engineering, other installation accuracy can be appropriately reduced after the alignment accuracy of the spinning axis to the light target and the installation accuracy among the gear assembly, the sun-facing bracket and the sun-tacking sensor are ensured, thereby reducing requirements for the installation accuracy to a certain extent, and being applicable to places such as solar thermal power generation, solar furnace heat collection, natural light illumination and the like in which the heliostat is used in a large scale.

Description

technical field [0001] The invention belongs to the technical field of solar heat collection, and in particular relates to a heliostat device and working method based on a solar tracking sensor. Background technique [0002] In tower-type solar thermal power plants, heliostats are roughly divided into two types according to their structural forms. One is the azimuth and elevation angle type, whose azimuth axis is perpendicular to the ground and the elevation angle axis is horizontal to the ground. It is now widely used in tower-type thermal power plants at home and abroad. The other is the spin elevation type, the spin axis faces the light target, and the elevation axis is installed perpendicular to the spin axis. Due to the instability of the operating center of gravity and the inconvenience of installation, it is not widely used in tower thermal power plants, but The optical performance of the spin-elevation type heliostat is stronger than that of the azimuth elevation typ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a heliostat device and working method based on a sun-tracking sensor, which solves the problem that the current system requires an angle encoder and a sun position algorithm for closed-loop control of the heliostat, and provides a simple and easy system

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