315 results about "Heliostat" patented technology

The present invention relates to a method and apparatus for calculating and evaluating the loss of light collection efficiency of a heliostat. 【Solution means】The present invention simulates the pulsating wind load distribution of a heliostat at different elevation-azimuth angles by CFD calculation, extracts the aerodynamic admittance function and shape parameters, constructs a pulsating wind load spectrum prediction model, calculates the pulsating wind load spectrum by combining the attitude parameters of the heliostat, applies the pulsating wind load spectrum to the structural model of the heliostat mirror by finite element analysis, obtains the instantaneous dynamic response, displacement and strain distribution characteristics of the heliostat, simulates the influence of mirror deformation on the light reflection path, quantifies the instantaneous influence on the light collection efficiency of the deformed mirror, and generates a dynamic curve of the change of light collection efficiency over time.

The invention relates to the technical field of solar thermal power generation, and discloses a mirror field and heat absorber cooperative control method and system, and the system comprises a simulation coupling module which determines a light incident angle based on irradiation data and a sun position model, builds a heliostat model in a simulation environment, simulates a three-dimensional thermal fluid, determines a heat absorber model, and controls the heliostat model and the heat absorber model; the control strategy module determines a control strategy according to the heliostat model and the heat absorber model, the control strategy module integrates a plurality of intelligent control algorithms, predicts a future state and adjusts control input based on the models, and the environment simulation module provides a training scene and a fault working condition scene of extreme weather and sets the extreme weather as a plurality of risk levels. The data analysis module collects and stores operation data, the operation state and performance indexes are displayed through a visual interface, control input is adjusted for the actual working condition and the future state on the basis of a dynamic model, and good control stability is achieved.

The invention relates to the field of heliostat calibration, and discloses a scheduling method for calibrating heliostats through cooperation of artificial light sources and cameras in a large-scale heliostat field, and the method comprises the following steps: determining the heliostat range covered by each camera, determining the heliostat range covered by each artificial light source, and determining the heliostat range covered by each camera; the method comprises the following steps: determining the center and size of a light spot in an image shot by a camera when the heliostats are calibrated, determining the heliostats which can be calibrated in the coverage range of each artificial light source-camera combination, regarding each effective calibration combination as a node to construct an undirected graph, dividing the nodes into a plurality of groups through a graph grouping algorithm, and ensuring that the nodes in the same group are not connected with each other, therefore, all combinations in the same group can execute calibration in parallel. According to the method disclosed by the invention, the problem of affiliation misjudgment caused by light spot interference between heliostats is solved, possible shadow and shielding problems are avoided, dynamic scheduling of the artificial light source and the camera is realized, and invalid operation time is shortened.

The utility model relates to a bonding sheet of a high-precision heliostat reflecting surface supporting assembly, which comprises a bonding sheet main body, a clamping mechanism is arranged on the lower side of the bonding sheet main body, the clamping mechanism comprises a hollow inserting rod, a rotating shaft, a tooth column and four clamping blocks, the rotating shaft is rotatably arranged on one side of the inner wall of the rotating shaft, and the tooth column is arranged on the other side of the rotating shaft. The tooth column is fixedly installed at one end of the rotating shaft, four clamping grooves are formed in the circumferential side of the hollow inserting rod, the clamping blocks are installed in the clamping grooves in a sliding mode, and a tooth plate is fixedly installed on one side of each clamping block and engaged with the tooth column. By means of the clamping mechanism, when the bonding sheet is installed on the supporting assembly, a worker can conveniently and rapidly install the bonding sheet on the supporting assembly, the subsequent worker can conveniently disassemble the bonding sheet, and therefore the using convenience of the bonding sheet is improved.

The invention discloses an automatic cleaning system and method for a reflector of a photo-thermal power station. The automatic cleaning system and method are suitable for cleaning tower type photo-thermal electric field heliostats and linear Fresnel photo-thermal reflecting mirror surfaces. According to the scheme, the system is mainly composed of a water (gas) distribution vehicle, a reflective mirror area management point, a mirror surface cleaning module and a control system. The mode of combining the Internet of Things technology and remote control is adopted, work of water supply, air supply (blow-drying of the mirror surface) and facilities of scraping plates and spraying is achieved, and the purpose of cleaning the mirror surface is achieved. Wherein the center of the tower-type photo-thermal heliostat surface is provided with a rotating shaft and a spraying scraper blade; the linear Fresnel photo-thermal reflecting mirror surface is provided with a reciprocating type driving mechanism and additionally provided with a water spraying scraper blade facility. According to the system, cleaning equipment is integrated on the reflective mirror, water (gas) is supplied by the water (gas) supply vehicle, full-automatic and efficient cleaning is achieved, and the cleaning efficiency and quality of the reflective mirror are improved.

The invention relates to the field of photo-thermal and photovoltaic technologies, in particular to a spanning type heliostat cleaning device. The invention provides a spanning type heliostat cleaning device. The spanning type heliostat cleaning device comprises a trolley assembly, a mirror surface cleaning device, a waste water collecting device and a water supply mechanism. The trolley assembly comprises a frame mechanism and a wheel mechanism, the frame mechanism is installed on the wheel mechanism, and an access channel extending in the first direction is formed in the trolley assembly; the mirror surface cleaning device comprises a transverse driving mechanism, a lifting driving mechanism and a mirror surface cleaning mechanism which are connected in sequence, the transverse driving mechanism is mounted at the top of the frame mechanism, and the lifting driving mechanism is vertically mounted on the transverse driving mechanism. According to the spanning type heliostat cleaning device, spraying water can be recycled, consumption of fresh water resources for heliostat cleaning can be remarkably reduced, and limited water resources can be distributed and used more reasonably. By means of the waste water collecting device, spraying water which is wasted originally is collected and reused, and recycling of water resources is achieved.

Methods and systems for separating a first metal from a metal-containing feed stream are provided. The method can include applying solar energy, for example, by focusing one or more mirrors in one or more heliostats, to heat a metal-containing feed stream in a heating zone to a first temperature to produce a first vapor including the first metal. The first vapor can be condensed in a condensation zone to produce a first liquid including the first metal, and the first liquid can be collected. The system can include a separation unit include a heating zone in fluid communication with a condensation zone and a means for applying solar energy to heat a metal-containing feed stream disposed in the heating zone.

Methods and systems for separating a first metal from a metal-containing feed stream are provided. The method can include applying solar energy, for example, by focusing one or more mirrors in one or more heliostats, to heat a metal-containing feed stream in a heating zone to a first temperature to produce a first vapor including the first metal. The first vapor can be condensed in a condensation zone to produce a first liquid including the first metal, and the first liquid can be collected. The system can include a separation unit include a heating zone in fluid communication with a condensation zone and a means for applying solar energy to heat a metal-containing feed stream disposed in the heating zone.

The invention discloses a tower type photo-thermal power station heliostat cleaning system which comprises a walking track, a walking mechanism and a cleaning mechanism, the walking track is fixedly installed on the ground of a tower type photo-thermal power station through a guide rail support, the walking mechanism is hung on a guide rail of the walking track through walking wheels, and the cleaning mechanism is placed in the walking mechanism. The walking mechanism can walk to the heliostat needing to be cleaned along the walking track, after the heliostat is adjusted to be in a proper state, the cleaning mechanism moves to the heliostat from the walking mechanism, accumulated dust on the heliostat is removed in the modes of air injection, water sprinkling, wiping, scraping and the like, the reflectivity of the heliostat is improved, the photo-thermal conversion efficiency of a condensation system is guaranteed, and the service life of the heliostat is prolonged. The heliostat cleaning system is a key technology for realizing automatic cleaning of the tower type photo-thermal power station.

A system for providing a contour map of the surface of a heliostat from reflected sunlight using a fly's eye camera. The system includes an entrance screen configured to receive sunlight reflected by said heliostat; an array of imaging apertures extending across the entrance screen, each aperture forming an image of said heliostat from a different viewpoint to provide a plurality of heliostat images; one or more digital cameras configured to view all of said plurality of heliostat images; an image processor configured to map out from the plurality of heliostat images a location of sunlight delivered to the entrance screen to obtain a plurality of maps, and to provide, based on centroids of said maps a tip and tilt of each said subsection The reflecting surface profile of the heliostat is obtained by integration of the subsection tilts across all the subsections.

The invention provides a method and device for generating a heliostat field arrangement scheme of mountain topography, and relates to the technical field of solar thermal power generation engineering, and the method comprises the steps: constructing an irregular triangular network model of an initial heliostat field arrangement range through employing a Delou triangulation method; establishing a three-dimensional terrain curved surface model according to the irregular triangular net model; regularized grid arrangement is implemented on the three-dimensional terrain curved surface model; performing interpolation analysis on each grid in the regularized grid arrangement by adopting a cubic spline interpolation function, and determining an initial coordinate and a height of the heliostat field; and carrying out multi-objective optimization on the initial coordinates and the height by utilizing a projection area constraint condition and a self-adaptive gravitational search algorithm to obtain a final heliostat field arrangement scheme. According to the method, the technical defects of insufficient terrain adaptability, imperfect shielding effect control, insufficient system energy efficiency optimization and the like in the implementation process of the existing technical scheme can be effectively solved.

A drone deployable modular system for remote solar energy generation utilizes remote-controlled multi-rotor drones configured to deliver and maintain modular heliostat units for assembly into heliostat fields in remote locations. The drone deployable modular heliostat unit may include a frame that supports at least one deployable, mirrored surface controlled by a heliostat driver. In one embodiment, the deployable, mirrored surface is a MYLAR film tensioned over a mirror frame portion supported and controlled by the heliostat driver to orient a working face of the mirrored surface in various positions. The drone deployable modular heliostat unit may include a deployable stand arrangement and / or an anchor system. The modular heliostat units may be configured to be deployed in heliostat fields in a generally peripheral arrangement to provide reflected solar energy to a centrally located concentrating solar collector / energy utilization system.

The invention provides an error compensation method for a heat absorption screen of a tower type photo-thermal power station and an automatic operation system for the tower type photo-thermal power station. The method is applied to a control system of a tower-type photo-thermal power station, and comprises the following steps: dividing an annual time interval to obtain a plurality of characteristic time periods; according to corresponding target point positions configured by a control system, compensation parameters used for adjusting the target point positions in the different characteristic time periods are generated, and the compensation parameters are stored in the control system; in the preheating stage of the tower type photo-thermal power station, the compensation parameter of the corresponding target point is read according to the characteristic time period to which the current date belongs; and sending the compensation parameters to a control system of the tower-type photo-thermal power station, adjusting the target point positions of the heat absorption areas through the control system, and sending the target point positions to corresponding heliostat controllers so as to carry out attitude adjustment compensation on the heliostats. According to the technical scheme, the preheating efficiency can be improved.

The invention discloses a tower-type solar radiation energy density distribution simulation parameter determination method, which comprises the following steps of: sampling parameters with relatively large influence on the number of light rays on a receiver, and determining the optimal number of light rays on a corresponding initial receiver according to sampling values corresponding to each group of parameters; and constructing a data set based on the sampling values corresponding to each group of parameters and the optimal light number on the corresponding initial receiver. Constructing a neural network, training and optimizing the neural network to obtain an optimized neural network model, for any given mirror field, obtaining an optimal light number on a target receiver through the neural network model, and calculating an interception rate according to the optimal light number on the target receiver; therefore, the number of light rays on the target heliostat infinitesimal element is obtained. According to the method provided by the invention, a basis is provided for setting the number of the light rays on the heliostat infinitesimal elements in a radiation energy density distribution simulation algorithm, and the simulation efficiency can be effectively improved on the premise of ensuring the simulation precision and stability.

The present invention discloses a heliostat calibration method using a self-correcting calibration device, comprising the following steps: setting initial parameters of the calibration device and initial parameters of the heliostat motion model, calculating a theoretical heliostat posture value in which the center of the heliostat light spot falls exactly on the center of a camera; calibrating each heliostat using the calibration device to obtain a heliostat posture calibration value; constructing a normal / abnormal calibration result statistical table to determine which calibration devices are abnormal; correcting abnormal calibration devices; recalibrating each heliostat using the corrected calibration device, reconstructing a normal / abnormal calibration result statistical table to determine which heliostats are abnormal; and calibrating heliostats determined to be abnormal. The calibration method disclosed by the present invention can eliminate the influence of errors in the calibration system itself, reduce the period of regular manual calibration of the calibration system, and improve the accuracy of heliostat calibration.

An auxiliary calibration apparatus and method for a heliostat, and a photothermal power generation system. The auxiliary calibration apparatus for a heliostat comprises a calibration body and a detection assembly. The calibration body comprises a first optical surface and a second optical surface which are oppositely disposed. The detection assembly is provided with a first sensing surface and a second sensing surface, the first sensing surface being parallel to the second sensing surface. The detection assembly is used for detecting a second light spot position of a target point of a receiving tower on the second sensing surface after passing through the second optical surface, and detecting a first light spot position of the image of the sun in a heliostat on the first sensing surface after passing through the first optical surface, so as to adjust the angle of the heliostat on the basis of the second light spot position, such that the first light spot position and the second light spot position are symmetrical about the center of the detection assembly. By using the described solution, the adjustment precision of the heliostat can be improved.

Methods and systems for separating a first metal from a metal-containing feed stream are provided. The method can include applying solar energy, for example, by focusing one or more mirrors in one or more heliostats, to heat a metal-containing feed stream in a heating zone to a first temperature to produce a first vapor including the first metal. The first vapor can be condensed in a condensation zone to produce a first liquid including the first metal, and the first liquid can be collected. The system can include a separation unit include a heating zone in fluid communication with a condensation zone and a means for applying solar energy to heat a metal-containing feed stream disposed in the heating zone.

The invention discloses a medium and low latitude concentric circle mirror field layout optimization method taking a heat collection tower as a center. The method comprises the following steps: preparing before model establishment; sequentially establishing a heliostat reflection model, a heliostat cosine efficiency model, a heliostat shadow shielding efficiency model and a heliostat overflow efficiency model based on the working principle of the tower type solar photo-thermal power station; establishing a concentric circle mirror field layout optimization model taking the heat collection tower as the center; according to the method, an optical efficiency model of the heliostat is established based on a cosine efficiency model, a shadow shielding model and an overflow efficiency model of the heliostat by combining solar apparent motion parameters; a mirror field layout optimization model with a heat collection tower as the center is established, solution searching is carried out with the help of a genetic algorithm, so that an optimal combination scheme of detail parameters of the mirror field is obtained, the highest annual average optical efficiency is 65.9% under the condition that the rated power of the mirror field with the radius of 350 m is 60 MW, and if the rated power is not fixed, the maximum annual average output thermal power can reach 95.119 MW. And the maximum annual average optical efficiency can reach 73.1%.

The invention provides a multi-tower one-machine photo-thermal power generation system which is composed of five tower type heat collection systems, heat absorption towers in the five tower type heat collection systems are arranged in an isosceles trapezoid mode, and the heat absorption towers in the first tower type heat collection system, the second tower type heat collection system, the third tower type heat collection system, the fourth tower type heat collection system and the fourth tower type heat collection system are located at the four vertex positions of the isosceles trapezoid respectively. A heat absorption tower in the fifth tower type heat collection system is located at the midpoint position of the bottom edge of the isosceles trapezoid, and the first tower type heat collection system, the second tower type heat collection system, the third tower type heat collection system and the fourth tower type heat collection system are each composed of a heat absorption tower and a heliostat field. The fifth tower type heat collection system is composed of a heat absorption tower, a heliostat field, a steam generation system, a steam turbine generator set, a hot salt tank and a cold salt tank. The heat absorption tower is arranged on the south side of the center of a heliostat field; through the overall optimization of the layout of the multi-tower one-machine photo-thermal power generation system and the design of the pipeline length and the pipeline nominal diameter, the power generation efficiency of the whole multi-tower one-machine photo-thermal power generation system can be effectively improved, and the multi-tower one-machine photo-thermal power generation system always keeps high-efficiency operation; and meanwhile, the construction cost of the multi-tower one-machine photo-thermal power generation system can be effectively reduced.

The invention relates to the technical field of energy storage and new energy power generation, and discloses a tower-type photo-thermal system aiming method and device.The method comprises the steps that a relative coordinate system of the position of a heat absorber, the position of a heliostat and the position of the sun is established; calculating an independent light spot of reflection light corresponding to each heliostat based on the position of the heat absorber, and marking the light spot of which the drop point is the heat absorber as an incident light spot; overlapping all the incident light spots to obtain an initial combined light spot; the initial combined spot is adjusted based on a heat absorber acceptable spot upper limit. The invention provides a light spot simulation, aiming strategy determination and combined light spot detection and correction method and an aiming point determination method of a photo-thermal power station, realizes a heliostat light spot offset and aiming center correction method aiming at a concentrating photovoltaic part, improves the energy utilization rate, and improves the energy utilization rate. And a hardware arrangement strategy provided by the invention can effectively ensure the safety of the heat absorber.

1. Name of the design product: heliostat. 2. Use of the design product: heliostat is an optical device that can automatically track the sun and reflect sunlight to a fixed target. 3. Design points of the design product: in the combination of shape and pattern. 4. Picture or photo that best indicates the design points: perspective view.

The invention discloses a heliostat field layout optimization method and device, a medium and a product, and relates to the field of photo-thermal power generation. The method comprises the following steps of: discretizing a solar cone into a plurality of light rays, simulating a propagation path of the light rays in a heliostat field by adopting a Monte Carlo ray tracing method, and further calculating shadow shielding efficiency and heat collector cutoff efficiency; calculating the comprehensive optical efficiency of the single-sided heliostats in the heliostat field according to the shadow shielding efficiency and the heat collector cut-off efficiency, and further calculating the annual average optical efficiency and the annual average output heat power of the heliostat field; the annual average optical efficiency and the annual average output thermal power are used as objective functions of a non-dominated sorting genetic algorithm, heliostat field layout is optimized, and a Pareto optimal solution set is obtained; and a weighted maximum satisfaction method is adopted to make a decision, and an optimal layout scheme of the heliostat field is selected from the Pareto optimal solution set. By improving the accuracy of optical efficiency calculation in the heliostat field layout optimization process, the energy efficiency of the heliostat field is maximized.

The present invention provides a method, device, medium and equipment for testing the deviation of the light concentration efficiency of a heliostat, belonging to the field of solar power generation. The method includes: adjusting the positions of the heliostat structure model and the Lambert target; applying wind loads with various parameters to the heliostat structure model, and obtaining the positions of the reflected light spots at a preset frequency; determining the light concentration efficiency of the Lambert target according to the positions of the light spots; and determining the deviation effect of the wind load on the light concentration efficiency of the heliostat structure model according to the light concentration efficiency and the parameters of the wind load. In this way, the deviation effect of the wind load on the light concentration efficiency of the heliostat is obtained, and further the light concentration deviation of the heliostat under wind-induced vibration is traced, which is beneficial to improving the structure transmission system and the tracking control system of the heliostat, reducing the influence of the actual working environment of the heliostat on the light concentration deviation of the heliostat, improving the tracking accuracy of the heliostat structure, and having important engineering value for promoting the popularization and application of the solar thermal power generation technology.

The application belongs to the technical field of solar photovoltaic power generation, and particularly relates to a tower type photovoltaic power generation device, which comprises a tower, a heliostat and a receiver, the tower is vertically installed on the ground, the receiver is fixedly installed on the top of the tower, the number of the heliostats is multiple, the multiple heliostats are sequentially arranged on the ground, and the tower is arranged at the middle position in the multiple heliostats; the controller is used for controlling the power supply to pass through a group of electric conductors to electrify the electromagnetic ring plate, the electromagnetic ring plate emits the magnetism to repel the dust wiping magnetic plate, the dust wiping magnetic plate is driven by the magnetic repulsion force of the electromagnetic ring plate to move the slag scraping block downward, the slag scraping block scrapes and wipes the receiver and the wind measuring ring when moving, the dirt and dust on the surface of the receiver and the wind measuring ring are wiped off, the function of cleaning dirt is achieved, and the flying sand and dust falling on the surface of the receiver is prevented from affecting the receiver to receive the light reflected by the heliostat, so that the photovoltaic power generation operation is more favorable.

A solar heliostat with pneumatic flow guide load shedding and friction damping vibration attenuation functions comprises a main beam, a plurality of auxiliary beams perpendicularly fixed to the main beam, a connecting piece fixed to the main beam, a plurality of inclined struts connecting the connecting piece and the auxiliary beams and the like. The supporting rod is fixed to the main beam, the friction damper is installed at the tail end of the supporting rod, the steel cables are connected with the friction damper, the main beam and the auxiliary beam respectively, and the triangular-prism-shaped covering body wraps the inclined struts in an attached mode. The friction damper comprises a friction base body, a friction element connected with a steel cable, a pressing plate matched with a friction concave surface of the friction base body to clamp the friction element, a pressure adjusting structure A for adjusting the pressing force of the pressing plate, a guide roller for guiding the steel cable connected with the friction element, and a pressure adjusting structure B for adjusting the tension force of the connected steel cable, according to the invention, airflow separation is guided to reduce the wind load through the prism aerodynamic configuration on the back of the heliostat; the friction force of each friction element and the pre-tightening force of the connected steel cable are independently set, the outer rigidity of the heliostat surface is enhanced, wind disturbance vibration is reduced, and the service optical precision is improved.

The invention discloses a positioning tool and a tapping method for a heliostat assembly, and particularly relates to the field of heliostat product maintenance devices. Comprising a first circular truncated cone, a first through hole and a plurality of second through holes are formed in the axial direction of the first circular truncated cone, and the second through holes are distributed along the outer circumference of the first through hole; a first boss is fixed to the surface of the first circular truncated cone, a third through hole is formed in the first boss, and the third through hole is located above the first through hole and communicates with the first through hole; a first positioning groove is formed in the second through hole in the surface of the first circular truncated cone and communicated with the second through hole, the inner diameter of the first positioning groove is larger than that of the through hole, and the first positioning groove and the first boss are located on the same side of the first circular truncated cone. On the basis of the device, the supporting base and the first circular truncated cone are in positioning connection through the positioning rod, accurate positioning is ensured, and shaking and screw tap deviation are avoided; and meanwhile, the tapping stability and accuracy of the heliostat support can be improved, and therefore the manual tapping speed can be increased.

The utility model discloses a heliostat fixing structure and a heliostat. The heliostat fixing structure comprises a lens, a lens holder and a lens frame, and the lens holder is located between the lens and the lens frame. The heliostat fixing structure further comprises a plurality of first adjustable connecting pieces and a plurality of second adjustable connecting pieces, and the first adjustable connecting pieces and the second adjustable connecting pieces are mutually independent. The first adjustable connecting piece is connected between the lens and the lens support and is used for adjusting the radian of the lens; and the second adjustable connecting piece is connected between the mirror holder and the mirror bracket and is used for adjusting the relative position of the mirror holder and the mirror bracket. According to the heliostat fixing structure, the radian and the position of the lens can be independently regulated and controlled, so that the control difficulty of the lens is reduced, the control precision of the radian and the position is improved, the heliostat fixing structure can meet the regulation and control requirements of the optimal radian surface type of the lens, and meanwhile, the heliostat fixing structure can be accurately positioned and connected with a lens bracket. In addition, the problem that the lenses are broken under the influence of external force when directly connected with the spectacle frame is solved, and the service life of the lenses is prolonged.

The application relates to the technical field of photo-thermal power generation and discloses a push rod type heliostat support for photo-thermal power generation, which comprises a base, a supporting column rotatably arranged on the base, a mounting seat hingedly arranged at the top end of the supporting column, an azimuth angle adjusting mechanism arranged on the base and used for pushing the supporting column to rotate so as to adjust the azimuth angle of the heliostat, and a height angle adjusting mechanism arranged on the supporting column and used for pushing the mounting seat to adjust the height angle of the heliostat. In the application, when the heliostat is installed, the third electric push rod is used to drive the descending push disc to descend, and then the supporting frame is rotated upwards around the pin shaft of the second hinge base as the rotating center, so that the folding degrees of the supporting frames are synchronously adjusted, the supporting posture is changed through the supporting frame, and the installation of the heliostat is matched, thereby solving the problem that the supporting structure of the heliostat in the prior art cannot be adaptively adjusted according to the shape and size of the heliostat.

Methods and systems for separating a first metal and an impurity from a metal-containing feed stream are provided. The method can include applying solar energy, for example, by focusing one or more mirrors in one or more heliostats, to heat a metal-containing feed stream in a heating zone to a first temperature to produce a first vapor including the first metal. The first vapor can be condensed in a condensation zone to produce a first liquid including the first metal, and the first liquid can be collected. The system can include a separation unit include a heating zone in fluid communication with a condensation zone and a means for applying solar energy to heat a metal-containing feed stream disposed in the heating zone.

The invention relates to the field of tower-type solar power generation, and discloses a tower-type photo-thermal mirror field shadow shielding efficiency rapid calculation method, which comprises the following steps: dividing a mirror field into a plurality of square grids according to coordinate data of heliostats, and determining the grid to which each heliostat belongs; for each heliostat, determining a neighbor heliostat of the heliostat; re-dividing the heliostat field into a plurality of square grids, and randomly selecting a heliostat from each grid as a typical heliostat; for each typical heliostat, calculating the shadow shielding proportion generated by the neighbor heliostat, and taking the shadow shielding proportion of the typical heliostat as the shadow shielding proportion of the grid where the typical heliostat is located; and the shadow shielding proportions of all typical heliostats are calculated, so that the shadow shielding efficiency of the whole heliostat field is calculated. According to the method disclosed by the invention, the calculation speed of the shadow shielding efficiency is improved while the calculation precision is ensured, and the balance point of the calculation precision and the calculation speed can be adjusted through different values of the parameters.