| 摘要 |
<p>A secondary light concentration system comprises a secondary light concentration device, a heliostat field (6) and a control network of the heliostat field. The secondary light concentration device comprises a plurality of light concentration modules (1) that are circumferentially distributed and integrally fitted into a light concentration surface. The heliostat field (6) is located under the secondary light concentration device, and sunlight rays reflected by heliostats in the heliostat field (6) aim at a virtual focus of the light concentration surface formed by the secondary light concentration device through fitting. The control network of the heliostat field is a distributed control system consisting of a computing server, heliostat drivers as well as network routers, network cables and power supply lines between the computing server and the heliostat drivers. The computing server stores motion parameters of the heliostats in the heliostat field at each moment of the year, and distributes the data in a fixed data format to the heliostat drivers on the heliostats through the network routers, the network cables and the power supply lines, so as to drive the heliostats to complete relevant operations. The control network of the heliostat field (6) controls the operations of the heliostats in the heliostat field, and with a single-column-type support structure of the secondary light concentration system, the shielding problem is effectively solved, and therefore the available range of a ground heliostat is greatly increased. The focal lengths of the light concentration modules can be flexibly adjusted through a light concentration module adjusting assembly of the secondary light concentration system to realize a modularized focal-length-adjustable function of a secondary reflection light concentration curved surface, and therefore the flexibility of the secondary light concentration device is improved, the installation precision requirement is reduced, and the installation and maintenance cost is decreased. By means of an inclination adjusting assembly of the secondary light concentration device, a variable optical axis function of the secondary light concentration device is realized, and therefore the requirements of target surfaces of heat absorbers at various angles are met, and the adaptation capability and the application range of the secondary light concentration system are greatly increased. A secondary light concentration mirror has two-dimensional discretization, the two-dimensional discretization is circumferential discretization and arc length discretization, the arc length discretization is division with equal chord length or division with uniform slope, and the circumferential discretization is division with equal-central angle. Further, a solar thermal power generation system is provided with the secondary light concentration system.</p> |
