62 results about "Global solar radiation" patented technology

A pyranometer for measuring solar irradiance at a selected site comprises a light detector adapted to produce an output signal in response to incident solar radiation, a reversible motor having a curved shadowband attached to its output shaft, means for mounting the light detector and motor so that the shadowband is at a fixed distance from the light detector; and a motor controller that is adapted to periodically cause the motor to rotate the shadowband from one to the other of two limit positions, with the shadowband acting to momentarily shadow the light detector during its movement between its two limit positions. A datalogger stores and processes the light detector's signal output to provide a measure of total horizontal, direct normal and horizontal diffuse solar irradiance.

The invention discloses a control method and a control system for mechanical ventilation of a greenhouse. The control method is used for controlling a fan in the greenhouse and comprises the following steps of: acquiring the rotating speed of the fan, temperatures inside and outside the greenhouse, humidity inside and outside the greenhouse and total solar radiation of the greenhouse; and generating a control signal for controlling rotation of the fan according to a greenhouse energy balance model based on the acquired rotating speed, temperatures inside and outside the greenhouse, humidity inside and outside the greenhouse and total solar radiation. According to the method and the system, the environmental conditions of the greenhouse can be acquired in real time based on the acquired rotating speed, temperatures inside and outside the greenhouse, humidity inside and outside the greenhouse and total solar radiation of the greenhouse, and the rotation of the fan is adjusted in real time based on the environmental conditions and according to the greenhouse energy balance model, so that continuous rotation of the fan can be controlled, and the energy consumption is low.

The invention brings forward a sun direct radiation value prediction method and system, and belongs to the technical field of prediction. The method comprises: A, predicting meteorology information by use of an intermediate scale prediction model, and generating intermediate scale prediction data; B, classifying the intermediate scale prediction data into prediction data using a sunny model and prediction data using a cloudy model; C, for the prediction data applying the sunny model, directly utilizing the theoretical calculation value of the sunny model, and performing mid-term prediction on a sun direct radiation value; and D, for the prediction data applying the cloudy model, performing model conversion on a sun total radiation value, and outputting a sun direct radiation value.

The embodiments of the invention disclose a prediction method and a prediction system for predicting the generating capacity of a photovoltaic power generation system. The prediction method comprises the following steps: estimating the proportion of the area of cloud in the sky in the sky area corresponding to a second preset moment according to the proportion of the area of cloud in the sky in the sky area corresponding to a first preset moment; calculating the total solar radiation at the second preset moment according to the proportion of the area of cloud in the sky in the sky area corresponding to the second preset moment; and finally, predicting the generating capacity of a photovoltaic power generation system at the second preset moment according to the total solar radiation and the temperature at the second preset moment. The error of the prediction method for predicting the generating capacity of a photovoltaic power generation system provided by the embodiments of the invention is within the allowable error range. The time range for prediction is extended.

The invention discloses a method of optimizing the space between photovoltaic tracking system assemblies. The method of optimizing the space between photovoltaic tracking system assemblies includes the steps: according to the relation between a tracking angle and the position of sun, establishing the relation between the solar tracking angle and the space between assemblies; based on the basic principle of solar irradiation calculation, calculating the solar radiation on an inclined plane, and establishing the relation between the solar radiation on an inclined plane and the space between assemblies; performing scattering correction on the solar radiation on an inclined plane, and establishing the relation between the total solar radiant quantity on the inclined plane after correction and the space between assemblies; and at last, according to the gain maximization of the total solar radiant quantity on the inclined plane after correction, selecting the space between assemblies.

The present invention discloses a solar energy resource analysis and assessment method for photovoltaic power station design. A self-built light resource database based on a solar energy resource area is used for assessment, automatically completes all calculation work required by the solar energy resource analysis and assessment and automatically generates finished products; and based on the solar energy resource area accomplishment construction, an object area is subjected to partition according to the condition of an insolation station, each partition takes an internal insolation station as a reference weather station, all the areas except the insolation station employ the uniform reckoning formula, and the solar energy resource data of the insolation station is employed to automatically calculate the total radiant quantity of the sun. The solar energy resource analysis and assessment method for photovoltaic power station design is suitable for development of the photovoltaic power station design at an object area, collects and arranges the light recourse data through the light resource database built based on the solar energy resource accomplishment construction, completes the solar energy resource analysis and assessment and outputs the accomplishment so as to improve the work efficiency, reduce the error probability and improve the quality of the finished products.

The invention discloses a method for optimizing the installation inclination angle of a photovoltaic panel based on representative horizontal plane radiation data, which can be applied to scientific researches and engineering applications in the fields related to renewable energy sources. In the invention, a method for determining the monthly optimum inclination angle, the season optimum inclination angle and the annual optimum inclination angle of a regional photovoltaic panel is put forward by using a solar radiation monthly mean model on an inclined plane based on representative daily solartotal radiation monthly mean value data on a horizontal plane, and the optimum inclination angle in different time periods is comprehensively analyzed. The method disclosed by the invention is applicable to various geographical and climatic conditions and has important significance in research for technologies related to photovoltaic power generation planning.

The invention provides an integrated control system and an integrated control method for wind-photovoltaic energy storage, and belongs to the technical field of industrial control. The system comprises wind power system control equipment, photovoltaic system control equipment and an integrated server, wherein the wind power system control equipment is used for obtaining a wind generation set power curve, complete one-year hourly wind speed, wind direction data, wind generation set position coordinates, a digital topographic map, and the number of wind generation sets, so that a hourly power output of a wind field is obtained; the photovoltaic system control equipment is used for obtaining a photovoltaic module power characteristic curve, complete one-year total hourly solar radiation data, optimum inclination angles of photovoltaic modules, and the number of the photovoltaic modules, so that a hourly power output of a photovoltaic field is obtained; and the integrated server is connected with the wind power system control equipment and the photovoltaic system control equipment by network equipment, and used for obtaining an optimum ratio of the number of the wind generation sets to the number of the photovoltaic modules according to the hourly power output of the wind field and the hourly power output of the photovoltaic field. The integrated control system and the integrated control method solve the problems that a ratio of a wind-photovoltaic energy storage system cannot be controlled accurately, and have the advantages of accuracy, high efficiency, real time, and the like.

The invention discloses an under-forest illumination intensity estimation method based on remote sensing, and the method comprises the following steps: 1, determining a to-be-detected region and illumination-related parameters, wherein the illumination-related parameters comprise the total time ht of the possible solar radiation in one day and the position parameters of the sun; 2, calculating the total solar radiation above a canopy, wherein the total solar radiation above the canopy in a to-be-detected region comprises the solar direct solar radiation in the direction of a local incidence angle, the scattered radiation and the reflected radiation of the ground surface, i.e., Gi=Bi+Di+Ri; 3, carrying out the inversion of a leaf area index through a remote sensing image, and calculating and obtaining the under-forest illumination intensity based on the Beer-Lambert law according to the total solar radiation above the canopy. The method provided by the invention is easy to implement, is low in cost, and is high in accuracy.

An irradiation property weather scene-based photovoltaic power generation acceptance estimation model comprises the steps of analyzing and acquiring distribution property and random property of photovoltaic contribution according to running data of a solar photovoltaic system, and respectively modeling a certainty part and a randomness part of the solar photovoltaic contribution; simulating son irradiation intensity of an arbitrary place on earth at an arbitrary moment under the condition of no shielding by building a global solar radiation model with regard to the certainty part of the solarphotovoltaic contribution, and calculating an upper limit value of photovoltaic forecast contribution; modeling a photovoltaic power generation randomness part by a photovoltaic shielding factor withregard to the random part of the solar photovoltaic contribution, building a photovoltaic shielding factor probability distribution model to obtain a random part simulation value of the photovoltaic contribution, and generating a contribution time sequence of a solar photovoltaic system by superposing results of the certainty part and the randomness part. By the method, the problem of power grid running uncertainty under large-scale new energy grid connection is solved, and the running capability and effect of a power grid are improved.

The invention belongs to the technical field of solar energy resource evaluation, and particularly relates to an urban building group available solar energy resource evaluation method and system, andthe method comprises the steps: obtaining the position information of the sun; obtaining geometric and azimuth information of the building; acquiring roof and side facade data of the building; and according to the sun position information, the relative position between the buildings, the geometrical relationship information and the roof and side elevation data of the buildings, calculating the height of the buildings, and calculating the sheltered time of different positions of the building roof and the side vertical surface; the total solar radiation received by the building roof and the sidefacades and the total global solar radiation in the preset time period are obtained; the solar energy utilization potentials of the roof and the side facades of the building group are accurately evaluated, support is provided for establishing informatization management systems for evaluating, inquiring, adjusting and the like of solar energy resources of the building group in an urban target area, and therefore scientific decision support is provided for development and utilization of the solar energy resources of the urban building group.

Provided are a method and an apparatus of developing a high-resolution solar meteorological resource map based on meteorological data, the method comprisingincluding: generating a grid with a predetermined length for a selected region on a map and setting resolution corresponding to a size of the grid; converting digital elevation model data and albedo data of the earth's surface into the resolution corresponding to the size of the grid; converting meteorological data into the resolution corresponding to the size of the grid; calculating a global solar radiation using the digital elevation model data, the albedo data of the earth's surface and the meteorological data as converted above; accumulating the calculated global solar radiation during a fixed period; and generating a solar meteorological resource map using the accumulated global solar radiation.

The invention relates to a calibration device and a calibration method used for an indoor pyranometer. A supporting pillar and a positioning pillar are arranged on left and right surfaces of a rotating crossbeam respectively, and a rotating shaft is fixed in a bearing in a shaft core and is movably connected with a fixed shaft; a light shield is fixed at the bottom end of a light shield disc, theupper end surface of the light shield disc is fixed with a crossbeam of a photochopper, the crossbeam of the photochopper is placed in a U-shaped mouth on an upright shaft of the photochopper and is connected with the upright shaft of the photochopper through a pin shaft; and the upright shaft of the photochopper is fixed on a worktable board, a turn table is fixed on the worktable board, the crossbeam of the photochopper is rotated clockwise to enable the light shield of the photochopper to be placed above the turn table, a light source support is fixed on the rear end surface of the worktable, an irradiation light is movably connected on the light source support, and the distance between the irradiation light and the worktable board can be adjusted. The method is characterized in that the calibration can be performed indoor at any time, and is not limited or influenced by weather; the light source is stable, the calibration time is short, and the stability is high; and the use is convenient, the efficiency is higher, and the data reliability is high.

The invention discloses a distributed photovoltaic power generating capacity estimating system and a solar radiation data generation method, and is widely applicable to scientific research and engineering application in the area related to solar energy. A comprehensive calculating module utilizes a representative weather year and month method to acquire weather index data to calculate and analyze, an evaluated and quantized value acquiring module is used for overlapping and transforming total solar radiation data every day of the year generated in the comprehensive calculating module so as to acquire evaluated and quantized value, and a distributed photovoltaic power generating evaluating module compares the quantized value with a evaluation system to acquire a distributed photovoltaic power generating capacity evaluating result. The distributed photovoltaic power generating capacity estimating system and the solar radiation data generation method can be widely applied to various areas and weather conditions, the generated total solar radiation data every day of the year are representative, the evaluating result is objective and reasonable, and the requirement of distributed photovoltaic power generating planning engineering application can be met.

The invention discloses a photovoltaic ultra-short-term power forecasting method based on a sunflower No.8 satellite cloud atlas, and relates to the technical field of photovoltaic power generation and distribution. The method comprises the steps: S1, calculating the theoretical radiation of each power plant based on the geographic position and environment of each power plant; S2, calculating thetotal solar radiation on the inclined plane according to the theoretical radiation of each power plant; S3S3, collecting sunflower No.8 satellite cloud picture monitoring data every 2-6 hours, and preprocessing the collected data; S4, performing cloud cover inversion by using the preprocessed data, establishing a neural network and wavelet analysis cloud cover prediction model, and predicting thefuture cloud cover; S5, calculating a cloud shading coefficient according to the predicted cloud amount; S6, calculating to obtain effective total radiation according to the solar total radiation andthe cloud shielding coefficient; and S7, converting the effective total radiation into power to obtain predicted power. The method has the advantages of being simple and high in prediction accuracy.

The invention relates to an unmanned aerial vehicle-mounted solar radiation perpendicular distribution detection method. According to the method, a radiation sensor placement platform is additionallyarranged at an upper part of an unmanned aerial vehicle main body, and a solar total radiation sensor and an ultraviolet radiation sensor are erected on the platform. The flight time and height of anunmanned aerial vehicle is recorded by lift-off of the unmanned aerial vehicle, the radiation data is simultaneously recorded, the time data is finally measured according to the flight time of the unmanned aerial vehicle and by the sensor, the time of the unmanned aerial vehicle is corresponding to the time of the radiation sensor, the height of the radiation sensor can be corresponding to the flight height of the unmanned aerial vehicle, and perpendicular distribution data of solar radiation and ultraviolet radiation is obtained.

The invention discloses a photovoltaic short-term power forecasting method based on a sunflower No.8 satellite cloud atlas, and relates to the technical field of photovoltaic power generation and distribution, and the method comprises the steps: S1, calculating the theoretical radiation of each power plant based on the geographic position and environment of each power plant; s2, calculating the total solar radiation on the inclined plane according to the theoretical radiation of each power plant; s3, collecting sunflower No.8 satellite cloud picture monitoring data every 1-5 days, and preprocessing the collected data; s4, performing cloud cover inversion by using the preprocessed data, establishing a neural network and wavelet analysis cloud cover prediction model, and predicting the future cloud cover; s5, calculating a cloud shading coefficient according to the predicted cloud amount; s6, calculating and obtaining effective total radiation according to the solar total radiation and the cloud shielding coefficient; and S7, converting the effective total radiation into power to obtain predicted power. The method has the advantages of being simple and high in prediction accuracy.

The invention relates to a calibration device and a calibration method used for an indoor pyranometer. A supporting pillar and a positioning pillar are arranged on left and right surfaces of a rotating crossbeam respectively, and a rotating shaft is fixed in a bearing in a shaft core and is movably connected with a fixed shaft; a light shield is fixed at the bottom end of a light shield disc, theupper end surface of the light shield disc is fixed with a crossbeam of a photochopper, the crossbeam of the photochopper is placed in a U-shaped mouth on an upright shaft of the photochopper and is connected with the upright shaft of the photochopper through a pin shaft; and the upright shaft of the photochopper is fixed on a worktable board, a turn table is fixed on the worktable board, the crossbeam of the photochopper is rotated clockwise to enable the light shield of the photochopper to be placed above the turn table, a light source support is fixed on the rear end surface of the worktable, an irradiation light is movably connected on the light source support, and the distance between the irradiation light and the worktable board can be adjusted. The method is characterized in that the calibration can be performed indoor at any time, and is not limited or influenced by weather; the light source is stable, the calibration time is short, and the stability is high; and the use is convenient, the efficiency is higher, and the data reliability is high.

The present invention discloses a centralized solar hot water monitoring system which comprises a solar hot water system, monitoring equipment, a data transmission system and data processing software. The solar hot water system is centralized and carries an auxiliary heat source. The monitoring equipment comprises a solar total radiation sensor, a first heat meter, a second heat meter, a third heat meter and an electric energy meter. The data transmission system comprises a data output device which is matched with the monitoring equipment, a data transmission line and a data receiving device. The data processing software carries out analytical calculation on the operation parameter according to a preset calculation rule and obtains a performance evaluation index. According to the monitoring system, the operation state of solar hot water can be displayed in real time, the evaluation indexes of guaranteed rate, heat collection efficiency, supplied hot water temperature and the like of the solar hot water system can be calculated, a system application effect is reflected, a manager can timely find and solve a problem and optimizes the system according to actual needs, and a comprehensive real-time sustainable solar hot water monitoring system is established.

The present invention relates to the field of date monitoring technology, especially to a solar photovoltaic generation data monitoring system. A temperature sensor employed by the solar photovoltaic generation data monitoring system is a bus device digital thermometer, with simple line and small size, and the temperature sensor is used for forming a temperature measurement system and directly transmitting field temperature in a one-wire bus digital mode, so that the interference immunity resistance of the solar photovoltaic generation data monitoring system is greatly improved and the temperature sensor is wide in measurement range and high in measurement precision and is applicable to the measurement of yield temperature at severe environment; a solar energy radiometer is configured to measure total solar radiation and solar radiation, incident on an oblique plane, with the spectral range of 0.3-3[Mu]m, so that the measurement range of the system is widened; the ammeter of the solar photovoltaic generation data monitoring system is configured to measure a plurality of electric power parameters and accurately measure each electric power parameter in the high-harmonic pollution environment; and the solar photovoltaic generation data monitoring system is provided with an industrial standard RS-485 communication interface and an MODBUS-RTU communication protocol, with functions of data acquisition, transmission and control, convenient and simple usage and easy operation.

The invention discloses a system for measuring the comprehensive radiation absorption coefficient of the surface of a building material. The system comprises a thermal insulation box, a solar total radiation sensor, an anemometer, a small automatic weather station, a thermocouple temperature sensor, an air temperature sensor, a water temperature sensor and a building materials test piece. The building material test piece and the thermal insulation box form a closed box, and the water temperature sensor is arranged in the box; the thermocouple temperature sensor is arranged on the surface of the building material test piece; the air temperature sensor is arranged in a test environment; the solar total radiation sensor and the anemometer are arranged nearby the building material test piece;the total solar radiation sensor is used for detecting the total solar radiation quantity; the anemometer is used for detecting the speed of wind flowing through the outer surface of the building material test piece; and the small automatic weather station is used for collecting and storing data in real time. The comprehensive radiation absorption coefficient is directly measured in a natural environment in order to well simulate the radiant heat behavior of an actual engineering structure material in a service environment.

The invention provides a daylight greenhouse building orientation simplification design calculation method, and belongs to the field of facility agriculture building energy-saving design. With the control target that a greenhouse front roof accumulated intercepted total solar radiation amount in the critical period for daylight greenhouse overwintering out-of-season production of thermophilic fruits and vegetables being the largest and with the greenhouse sunshine time and the sunshine quality being the constraint condition, a design calculation simplification model of the daylight greenhouse building optimal orientation based on a mathematical extreme value theory is constructed. Through the model, an optimization design recommended value of the daylight greenhouse building orientation in regions with different geological latitudes can be given. The daylight greenhouse building orientation simplification design calculation method provides an important theoretical basis for formulating relevant design standards or norms in China. When the geological latitude of an engineering field and the vegetable production critical production period which needs to be ensured by a greenhouse are determined, according to the daylight greenhouse building orientation simplification design calculation method, the optimization design value of the daylight greenhouse building optimal orientation can be obtained through calculation, and the daylight greenhouse energy-saving effect is remarkable under the optimal building orientation.

The invention provides a solar radiation testing method which comprises the steps of (S1) setting a plurality of solar cell units in different collection sites, (S2) carrying out light attenuation larger than 20KWh / m2 on the solar cell units, (S3) collecting the solar total radiation of the plurality of solar cell units, obtaining a corresponding current value generated by the solar cell units through a sampling circuit and transmitting the current value to a single chip microcomputer, and generating solar total radiation data which can be compared, (S4) allowing the single chip microcomputer to obtain real-time time and the longitude and latitude of a sampling site from a real-time clock circuit and a GPS module, (S5) storing the solar total radiation data of the solar cell units through a storage module, and (S6) sorting the solar total radiation data from small to large through a processor.

The invention discloses an adjustable total solar radiation measurement bracket and an operation and application method thereof. The bracket comprises a measuring instrument clamping body, a horizontal rod, a solid screw, a vertical rod and a metal base, and is characterized in that the horizontal rod and the solid screw form a horizontal assembly through threaded connection, the measuring instrument clamping body is used for fixing a total solar radiation measuring instrument, the measuring instrument clamping body is enabled to be connected with the end part of the horizontal rod through a first fixing member so as to enable the total solar radiation measuring instrument to perform measurement in a suspended manner, the left end of the solid screw is provided with a screw thread, the right of the solid screw is provided with a screw hole, the surface of the solid screw is provided with horizontal scales, and the solid screw is fixedly connected with the vertical rod through a secondfixing member; and the vertical rod is fixed on the metal base. The bracket can adjust the vertical height and the horizontal length of the measuring instrument according to test requirements and thesample size. In addition, the adjustable total solar radiation measurement bracket is simple in structural design, easy to assemble and disassemble and convenient to carry.

The invention discloses a daytime solar radiation estimation model based on a sparrow search algorithm-deep belief network, and belongs to the technical field of new energy power generation. The method includes obtaining Meteorological parameter data, air pollution data and daytime total solar radiation data, and using a mutual information theory to select an optimal input variable; establishing an estimation model for the input variables, comparing estimation errors, and determining an optimal input variable; on the basis of selecting the optimal input variable set, establishing a solar radiation estimation model based on a deep belief network (DBN); and further analyzing the deep belief network model, optimizing deep belief network parameters by adopting a sparrow search algorithm, and establishing a deep belief network model based on the sparrow search algorithm. According to the invention, the deep belief network is improved by using the sparrow search algorithm, so that the estimation accuracy is improved; reliable operation of a photovoltaic system is guaranteed, and engineering practice application is better.

The invention relates to a method for inverting surface solar total radiation and direct radiation based on a wind cloud No.4 satellite, and the method comprises the following steps: (1), selecting awind cloud No.4 satellite image, carrying out the classification, recognition and processing of a satellite cloud chart, converting a pixel image into a pixel image of a cloud index, and respectivelycalculating a cloud index through employing a Heliosat-2 method in a month unit, and further obtaining a clear sky index Kc; (2), utilizing McClear data, and then respectively calculating an earth surface total radiation numerical value GHI and a direct solar radiation DNI; (3), optimizing the direct solar radiation DNI according to the following formula based on the change rule that the direct radiation inversion value is smaller than the observed value in half a year in winter to obtain a direct solar radiation optimized value; and (4), performing evaluating according to the surface total radiation numerical value GHI and the direct solar radiation optimization value, and analyzing the change characteristics of the direct solar radiation optimization value. The method is simple in calculation and high in accuracy.

The invention discloses an energy-saving analysis meteorological annual calculation method, system and device and a storage medium. The method is used for hourly dynamic building energy consumption simulation. According to the energy-saving analysis meteorological year AEEMY, the dry-bulb temperature, the horizontal plane solar total radiation, the atmospheric pressure and the relative humidity are used as main meteorological parameters for judging and representing the climate year, a principal component analysis method is used for determining the combination weight of the four main meteorological parameters, the energy-saving meteorological month is selected according to the combination value of the four parameters, and therefore the typical meteorological year is formed through combination. According to the method, fewer meteorological parameters than TMY2 are used, so that the selection of the AEEMY is simpler, and the AEEMY fully considers the difference of climate factors of different regions and different seasons on the building energy consumption effect, so that more locally represented energy-saving analysis meteorological data can be selected, and the influence of the climate on the building energy consumption can be reflected more accurately.

The embodiments of the invention disclose a prediction method and a prediction system for predicting the generating capacity of a photovoltaic power generation system. The prediction method comprises the following steps: estimating the proportion of the area of cloud in the sky in the sky area corresponding to a second preset moment according to the proportion of the area of cloud in the sky in the sky area corresponding to a first preset moment; calculating the total solar radiation at the second preset moment according to the proportion of the area of cloud in the sky in the sky area corresponding to the second preset moment; and finally, predicting the generating capacity of a photovoltaic power generation system at the second preset moment according to the total solar radiation and the temperature at the second preset moment. The error of the prediction method for predicting the generating capacity of a photovoltaic power generation system provided by the embodiments of the invention is within the allowable error range. The time range for prediction is extended.

The invention discloses a measuring device and method of total solar radiation. The device comprises a total solar radiation sensing unit and a detection communication unit. The total solar radiation sensing unit comprises a round solar radiation absorbing area divided into white sectors and back sectors as many as the white sectors; the white sectors and the black sectors are spaced and mutually thermally insulated; the white sectors are provided with platinum resistors as many as those provided in the black sectors; the platinum resistors in the white sectors are mutually connected in series; the platinum resistors in the black sectors are mutually connected in series; the two sets of platinum resistors are both connected with the detection communication unit. According to the method, the total solar radiation is obtained using an RBF (radial basis function) neural network. The measuring device and method has the advantages of good timeliness, high precision, high reliability and the like and allow the solar radiation to be measured precisely and reliably under special weather conditions.