Tower type photo-thermal power station heliostat scheduling method based on heat absorber temperature control

Abstract

The invention belongs to the technical field of tower-type solar photo-thermal power generation, and particularly relates to a tower-type photo-thermal power station heliostat scheduling method based on heat absorber temperature control, which comprises the following steps: firstly, obtaining the current parameters and state of a heat absorber and the influence parameters of solar radiation, meteorological parameters and cloud in the current and short period; calculating temperature-related parameters corresponding to each time sequence within a certain time and judging whether the temperature-related parameters exceed the limit or not; if not, determining each heliostat target point of each time sequence; and if the over-limit condition exists, calculating whether the temperature-related parameters exceed the limit or not according to calculation aiming points obtained by gradually moving the heliostats from the initial aiming points to the edge of the heat absorber until the temperature-related parameters do not exceed the limit any more, then confirming the target points of the heliostats in the time sequences, and scheduling the heliostats. According to the method, the target point of the heliostat is controlled and the heliostat is scheduled based on the temperature related parameters of the heat absorber, so that the temperature of the heat absorber can be ensured to be controllable under various normal steady-state working conditions, starting, stopping, preheating and changing working conditions that a mirror field is influenced by cloud and the like.

Description

technical field [0001] The invention belongs to the technical field of tower solar thermal power generation, and particularly relates to a heliostat scheduling method for a tower solar thermal power station based on temperature control of a heat absorber. Background technique [0002] Tower-type solar thermal power generation technology route is one of the main power generation forms in solar thermal power generation, and is currently being promoted by more and more engineering applications. The basic principle is: use the mirror field composed of many heliostats to reflect sunlight to the heat absorber at the top of the heat absorption tower, heat the working medium in the heat absorber, and the working medium can directly enter the steam turbine generator set. Power generation; it can also enter the heat storage system first, and exchange heat with the heat exchange system to generate steam to drive the turbine generator to generate electricity when power generation is req...

AI Technical Summary

Problems solved by technology

The method of using the surface power or heat flux of the heat absorber as the basis for heliostat scheduling cannot directly determine whether the heat absorber is in a safe operating state. For example, for the same heat flux or power, the heat absorber operates in different process ranges or Under working conditions, the temperature value may be doubled, and it cannot directly and reliably reflect whether the heat sink is in safe operation

[0007] In the original method, in order to ensure the safety of the heat absorber, the heat flux density on the surface of the heat absorber is uniformly set from top to bottom. The end of the heat sink, resulting in increased heliostat overflow losses, reducing the operating efficiency of the mirror field

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