Method for scheduling heliostat of tower type solar energy thermal power station

Abstract

The invention relates to a method for controlling a heliostat in a tower type solar energy thermal power station, for solving the problem of local overheating of the surface of a heat absorber in the prior art. An apparatus comprises a thermal collector tower. The top portion of the thermal collector tower is provided with a heat absorber. A plurality of heliostats which reflect sun light to the surface of the heat absorber are arranged around the thermal collector tower to form a heliostat field. The apparatus is characterized in that the surface of the heat absorber is divided into a plurality of cancellate heat absorption areas, the heliostat field is divided into a plurality of heliostat groups, each heliostat group comprises a plurality of heliostats, the heat absorption areas on the surface of the heat absorber are in one-to-one correspondence with the heliostat groups, the reflection target of the heliostats in each heliostat group is the geometric center of a corresponding heat absorption area, each heat absorption area is provided with an independent temperature control device, and when a temperature control device in a certain heat absorption area monitors that a signal exceeds a set value, the reflection target of the plurality of heliostats in the heliostat group corresponding to the heat absorption area is scheduled to a neighboring heat absorption area within a set scope. The method provided by the invention can ensure that energy on the surface of the heat absorber is uniformly distributed to the maximum, and the situation of local overheating of the surface of the heat absorber is prevented.

Description

technical field [0001] The invention belongs to the field of solar thermal power generation, and relates to a method for controlling a heliostat in a tower-type solar thermal power station, in particular to a scheduling method for controlling the projection of the heliostat onto a heat absorber. technical background [0002] The heliostat field is an important part of the tower solar thermal power plant. It is a heliostat group composed of many heliostats, which is used to reflect sunlight to the heat absorber of the tower. Existing solar tower power plants usually use an open-loop or closed-loop control method to make the heliostat adjust the angle with the change of the sun's position, and project the light spot on the surface of the heat sink in real time; through controlling the light spot on the surface of the heat sink Monitoring or the alignment system of the heliostat itself determines where the heliostat projects the spot of reflected sunlight onto the surface of th...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the energy reflected by the heliostat of the tower type solar thermal power station to the heat absorber may cause local overheating of the heat absorber, to provide a method for scheduling the position of the heliostat reflected on the surface of the heat absorber, and to control Heliostat Scheduling Method for Energy Distribution

Through the division and correspondence of the heat absorbing area on the surface of the heat absorber and the heliostat group, the energy on the surface of the heat absorber can be evenly distributed, and the individual heat absorbing area can be monitored at fixed points. When some uncontrollable Factors, such as some heliostat facula beyond the range of the corresponding heat-absorbing area, resulting in too high energy in the surrounding heat-absorbing area, resulting in excessive temperature in the heat-absorbing area or too fast temperature rise, can affect the heliostat in the heliostat group The mirror is adjusted to reflect the target and carry out energy splitting

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