JP2011058814A - System, method and program for predicting solar radiation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately predict solar radiation a short time ahead based on an observation value of the solar radiation. <P>SOLUTION: A solar radiation compensation function (30) compensates solar radiation mesh data (12) within a certain period of time from the present back to the past in a region including a prediction object point which are obtained by observation by a meteorological observation satellite with solar radiation data (14) obtained by ground observation. A solar radiation/false precipitation conversion function (32) applies the compensated solar radiation mesh data from the solar radiation compensation function (30) and a solar radiation theoretical value (16) on fine weather to a formula showing a relation between the solar radiation and precipitation so as to compute false precipitation. A false precipitation shift deformation prediction function (34) predicts a time-basis shift and the deformation of the false precipitation. referring to topographic data (18). A whole-sky solar radiation conversion function (36) returns the predicted false precipitation to the whole-sky solar radiation referring to the theoretical solar radiation on fine weather at the prediction date and time. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a solar radiation amount prediction apparatus, method, and program.

  Active use of natural energy such as wind power generation and solar power generation is being promoted toward a low-carbon society. In particular, photovoltaic power generation facilities that use photoelectric conversion elements that convert sunlight into electrical signals are being introduced. Since solar power generation is greatly affected by the amount of solar radiation, it is necessary to predict the amount of solar radiation for efficient operation.

  In Patent Document 1, a solar radiation amount prediction formula is derived based on the weather phenomenon observed in the past in the area where the photovoltaic power generation system is installed and the amount of solar radiation measured in the past. A technique for predicting the amount of solar radiation by inputting the amount of solar radiation measured in the installation area before the prediction execution time of the target day into the solar radiation amount prediction formula is described.

  In Patent Document 2, a current amount of solar radiation (actual value) is calculated from a remote sensing image, a predicted value of cloud movement amount is obtained from a past remote sensing image and a current remote sensing image, and in the future, for example, 3 hours It is described that the amount of solar radiation is predicted.

  Further, Patent Document 3 describes that the amount of solar radiation reaching the ground is estimated at a resolution of about 1 km every hour from GMS (Geostationary Meteorological Satellite) image data observed every hour. It is described that there is a calculation formula in a clear sky area without a cloud and a calculation formula in a cloud area with a cloud.

JP 2006-033908 A JP 2005-031927 A JP-A-11-212560

  In a large-scale photovoltaic power generation facility, planned power generation and prediction of power generation amount are important, and for that purpose, it is necessary to predict daily changes in sunshine amount as accurately as possible. In consideration of the operation of a large-scale photovoltaic power generation facility, it is most effective to predict the fluctuation of the amount of solar radiation on the next day in the previous day and operate one day based on the prediction. However, the prediction of the previous day cannot cope with the sudden change in weather on that day. In order to correct the operation plan corresponding to such a case, high-accuracy solar radiation amount short-time prediction of about 3 to 6 hours ahead is required.

  Since the technique described in Patent Document 1 uses a weather forecast for the installation area, it is originally difficult to accurately predict the amount of solar radiation for a short time. In the techniques described in Patent Documents 2 and 3, the movement of the cloud is predicted and reflected in the change in the amount of solar radiation. However, if the light transmittance of the cloud is not taken into account, it is difficult to predict the amount of solar radiation with high accuracy.

  An object of this invention is to show the solar radiation amount prediction apparatus, method, and program which can predict the amount of sunshine ahead of a short time with higher precision.

  The solar radiation amount prediction apparatus according to the present invention refers to observation value input means for inputting solar radiation amount observation value data of a predetermined area including a prediction target point in a past predetermined period retroactive from the present time, and a clear sunny solar radiation amount theoretical value. The solar radiation amount / meteorological data conversion means for converting the solar radiation observation value data into temporal / spatial distribution data of the weather element that disturbs the solar radiation amount, and the topography of the predetermined area with reference to the solar radiation amount / weather The movement deformation prediction means for predicting the temporal and spatial movement and deformation of the temporal and spatial distribution data of the weather element obtained by the element conversion means, and the data of the weather element predicted by the movement deformation prediction means, A solar radiation amount conversion means for converting into a predicted global solar radiation amount with reference to a theoretical value of the sunny solar radiation amount at a corresponding date and time.

  The solar radiation amount prediction method according to the present invention includes an observation value input step of inputting, into a computer, solar radiation amount observation value data of a predetermined area including a prediction target point in a past predetermined period retroactive from the present time, The solar radiation amount / meteorological element conversion step for converting the observed solar radiation amount data into temporal and spatial distribution data of the weather elements that interfere with the solar radiation amount with reference to the theoretical value of the amount, and the computer A movement deformation prediction step for predicting temporal and spatial movement and deformation of the temporal and spatial distribution data of the weather element obtained by the solar radiation / meteorological element conversion step with reference to the terrain, and the computer The amount of solar radiation that converts the data of the meteorological element predicted by the deformation prediction step into the predicted global solar radiation amount with reference to the theoretical value of sunny solar radiation at the corresponding date and time Characterized by comprising a conversion step.

  The solar radiation amount predicting program according to the present invention is a solar radiation amount predicting program for predicting the solar radiation amount using a computer. The solar radiation amount predicting program for a predetermined area including a prediction target point in the past predetermined period retroactive to the present computer. With reference to the observation value input function that inputs observation data and the theoretical value of sunny solar radiation, the solar radiation amount is converted into temporal and spatial distribution data of meteorological elements that interfere with solar radiation. / Meteorological element conversion function and movement that predicts temporal and spatial movement and deformation of the temporal and spatial distribution data of the weather element obtained by the solar radiation / meteorological element conversion function with reference to the topography of the predetermined area The data of the meteorological element predicted by the deformation prediction function and the movement deformation prediction function are converted into predicted global solar radiation with reference to the theoretical value of sunny solar radiation at the corresponding date and time. Characterized in that to realize the solar radiation conversion function.

  The present invention converts temporal and spatial distribution data of observed solar radiation values into temporal and spatial distribution data of meteorological elements that interfere with solar radiation, and then moves and transforms temporally and spatially in consideration of topography. Since it is returned to the global solar radiation amount after predicting, the global solar radiation amount ahead for a short time can be accurately predicted.

It is a schematic block diagram of one Example of this invention. It is a schematic diagram of a movement vector for movement / deformation prediction of simulated precipitation.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a schematic block diagram of an embodiment of the present invention, and FIG. 2 shows an operation flowchart of this embodiment. Although this embodiment is realized as a program on a computer, it is obvious that a part or all of the functions can be replaced with dedicated hardware.

  The CPU 10 of the computer performs various arithmetic functions 30 to 46 described below. The solar radiation amount mesh data 12 within a certain period going back to the past from the current region including the prediction target point obtained by observation by the weather observation satellite is input to the solar radiation amount correction function 30 of the CPU 10. The solar radiation amount mesh data 12 is temporal and spatial distribution data that is temporally distributed on a spatial mesh. For example, the spatial mesh interval is 1 km, for example, and the temporal axis interval is 1 for example. It's time. In order to improve the accuracy of the solar radiation amount mesh data 12, the solar radiation amount observation values 14 observed at the same time on the ground at a plurality of points in the region of the solar radiation amount mesh data 12 are input to the solar radiation amount correction function 30. The solar radiation amount correction function 30 generally corrects the solar radiation amount mesh data 12 according to the solar radiation amount observation value 14 so as to coincide with the solar radiation amount observation value 14 at or near the same point, and the correction result is the solar radiation amount / pseudo precipitation amount. Output to the conversion function 32.

  For each mesh point of the solar radiation amount mesh data 12, the solar radiation amount mesh data 12 (and the solar radiation amount observation value 14) and the clear sunny day solar radiation theoretical value 16 at the same time are input to the solar radiation amount / pseudo precipitation conversion function 32 of the CPU 10. . The clear daytime solar radiation amount theoretical value 16 is the theoretical solar radiation amount obtained at the corresponding time at each mesh point of the solar radiation amount mesh data 12, that is, the solar radiation amount in a state where there is no disturbance of solar radiation such as clouds and rain. The amount of solar radiation outside the atmosphere and the altitude and direction of the sun can be calculated from the information on the latitude and longitude of each mesh point and the observation date and time. It can be calculated as solar radiation.

The solar radiation amount / pseudo precipitation conversion function 32 calculates the pseudo precipitation according to the following formula from the corrected solar radiation mesh data from the solar radiation correction function 30 and the sunny solar radiation theoretical value 16. For each mesh point, using the relational expression when the factor that attenuates the sunny solar radiation theoretical value 16 is precipitation.
Pseudo precipitation = (1.0-corrected solar radiation mesh data / sunny solar radiation theoretical value) x 100
And Here, the maximum value of the pseudo precipitation is 100 mm / h.

  The simulated precipitation in the certain area thus calculated is stored as the simulated precipitation data file 52 in the hard disk 50 for the past certain period (tp to t0). In general, t0 is the latest past observation date and time when the solar radiation amount data 12 and 14 can be obtained, and tp indicates the past date and time that is a certain time earlier than t0. The file 52 stores pseudo-precipitation mesh data in a certain area for every hour within a certain period (tp to t0), that is, data indicating the temporal and spatial distribution of the pseudo-precipitation.

  The meteorological elements that block solar radiation are mainly clouds and precipitation / snowfall. In this example, the concept of simulated precipitation was introduced as an index for quantitative evaluation of these changes or movements. It should be noted that the simulated precipitation produced is not directly related to the precipitation itself. When the relational expression between the cloud thickness and the amount of solar radiation attenuation is used instead of the pseudo precipitation, the pseudo cloud quantity is quantitatively evaluated. The solar radiation amount / pseudo precipitation conversion function 32 can be said to be a means for quantitatively evaluating the attenuation of the solar radiation amount by substituting it with a weather element that can calculate the temporal and spatial movement deformation described later.

  The simulated precipitation movement deformation prediction function 34 of the CPU 10 refers to the terrain data 18 of the target area of the solar radiation amount mesh data 12, and from the simulated precipitation data file 52 for the future fixed period (tc to tf). Temporal changes in simulated precipitation distribution data are predicted at regular time intervals, for example, at 30-minute intervals. tc indicates the latest predicted date and time in the current or future, and tf indicates the predicted date and time in the future after a certain time from tc. In this embodiment, tp is 3 hours to 6 hours after tc.

  The movement of the fluid can be predicted by an advection model, for example. The simulated precipitation movement deformation prediction function 34 also applies the advection model to the temporal and spatial simulated precipitation distribution data in the file 52 and calculates the movement / deformation of the simulated precipitation distribution for the future at regular time intervals. . As shown in Fig. 2 (A), the pseudo precipitation distribution is divided into a number of small areas in the space, and the pseudo precipitation is compared in the time axis direction in units of small areas, so that the movement in units of small areas is performed. A vector can be calculated. As a result, movement / deformation in units of one or a small number of small regions can also be grasped quantitatively. FIG. 2A shows the state of the movement vector in units of small areas, and FIG. 2B shows the movement vector in units of small areas shown in FIG. 2A roughly in the entire 3 × 3 small area. An example expressed with simple motion vectors is shown.

  In the present embodiment, the influence of topography is taken into account when predicting the temporal change of the pseudo precipitation distribution during the short time in the future from the movement vector thus obtained. The terrain data 18 is, for example, 1 km mesh terrain data, and the wind direction is considered in 16 directions. For example, on the windward side of a mountainous area, clouds are likely to be generated due to the updraft, and thus acts to increase precipitation. Conversely, on the leeward side of the mountain, the cloud is lost by the downdraft, so the precipitation is weakened. The simulated precipitation movement deformation prediction function 34 adds the correction of the influence due to the terrain to the future simulated precipitation to obtain the predicted simulated precipitation. The obtained predicted simulated precipitation mesh data (x, y, tc to tf) is stored in the hard disk 50 as a predicted simulated precipitation data file 54.

  If it is sufficient to obtain the solar radiation amount prediction only for a specific prediction target area in the subsequent processing, the file 54 includes, at a minimum, predicted pseudo precipitation data (temporal distribution) of the target prediction target area. Data) only. In addition, when only the solar radiation amount prediction at a specific prediction target date and time is necessary on the time axis, the predicted simulated precipitation data (spatial distribution data) of the target prediction target date and time is minimally stored in the file 54. Only need to be stored. Further, when it is necessary to predict the amount of solar radiation at a specific prediction target date and time at a specific prediction target point, the file 54 is at least a spot of the target prediction target date and time of the target prediction target point. Only predicted simulated precipitation data need be stored.

The global solar radiation amount conversion function 36 of the CPU 10 refers to the theoretical value 20 of the sunny solar radiation amount at the predicted date and time t between tc and tf, and is the inverse relationship to the relational expression in the solar radiation / pseudo precipitation conversion function 32. Using the formula, the predicted simulated precipitation in the file 54 is converted into global solar radiation. Since the converted solar radiation amount is a predicted value here, it is expressed as a predicted solar radiation amount. That is, the global solar radiation amount conversion function 36 performs the following for each predicted date and time on each mesh.
Predicted global solar radiation = (1.0−predicted simulated precipitation / 100) × sunny solar radiation theoretical value is calculated. The total solar radiation amount conversion function 36 stores the mesh data of the conversion result in the predicted solar radiation amount data file 56 of the hard disk 50. The predicted solar radiation data stored in the predicted solar radiation data file 56 is the temporal and spatial distribution of the predicted solar radiation, that is, within a certain region including the prediction target point for a certain period (tc to tf) ahead of the present. Shows the distribution of predicted solar radiation.

  The clear sunny solar radiation amount theoretical value 20 can be calculated in the same manner as the clear sunny solar radiation amount theoretical value 16. That is, the sunny day solar radiation amount theoretical value 20 can be calculated based on the solar radiation amount calculated from the latitude and longitude of each mesh point and the predicted date and time (tc to tf), and the altitude and direction of the sun.

  The prediction target point extraction function 38 of the CPU 10 predicts a future fixed period (tc to tf) of the prediction target point (X, Y) from the predicted solar radiation data file 56 of the hard disk 50 according to the latitude / longitude data 22 of the prediction target point. Extract solar radiation data. The predicted solar radiation amount data of the prediction target point is referred to as point predicted solar radiation amount data. If the prediction target point is on the mesh, the predicted solar radiation amount data on the mesh is extracted as the point predicted solar radiation amount data. If the prediction target point is not on the mesh, the predicted solar radiation amount on the surrounding mesh Is interpolated or interpolated to generate predicted solar radiation data on the prediction target point. The predicted solar radiation amount data extracted by the prediction target point extraction function 38 indicates a temporal change or temporal distribution of the predicted solar radiation amount in the future fixed period (tc to tf) at the prediction target point (X, Y). Of course, the temporal change in the predicted solar radiation amount is unnecessary, and when only the predicted solar radiation amount at a specific time is desired to be known, the predicted solar radiation amount at the specific time may be extracted from the file 56.

  Needless to say, when the predicted simulated precipitation data stored in the predicted simulated precipitation data file 54 is already limited to the prediction target points, the point extraction by the prediction target point extraction function 38 is unnecessary. In other words, the prediction target point extraction function 38 may be executed before the global solar radiation amount conversion function 36 is executed.

  Since the calculation of this embodiment takes a large amount of data, the calculation process takes time, and when the predicted solar radiation amount data file 56 can be generated, the solar radiation amount observed value at or near the predicted date and time at the prediction target point. May have been obtained. The correction function 40 of the CPU 10 functions when the amount of solar radiation is observed at such a prediction target point. That is, the correction function 40 uses the predicted solar radiation amount data for a certain period (tc to tf) of the prediction target point (X, Y) extracted by the prediction target point extraction function 38 as the observed solar radiation amount at the same time of the prediction target point. The error is corrected by inserting linearly outside the error. However, since it becomes unclear in the future, the correction amount is reduced with the passage of time. Such correction can improve the prediction accuracy of the latest predicted value. Predicted solar radiation amount data for a certain period (tc to tf) corrected by the correction function 40 is stored as a file 58 in the hard disk 50.

For example, the correction function 40 sets the difference between the predicted solar radiation amount and the observed value at the predicted date and time that coincides with or close to the observation date and time as the actual value, and multiplies the actual value by a weighting factor that decreases as the predicted date and time increases. Add to the predicted amount of solar radiation. When expressed in mathematical formulas, for example,
Correction predicted value (i) = predicted value (i) −actual correction value × (maximum correction time−i) / maximum correction time actual correction value = predicted value (0) −observed value. However, the maximum correction time is the length of time to be corrected here, and is, for example, 6 when correcting predicted values up to 6 hours ahead. i indicates the time from the observation date and time of the observed value to the predicted date and time, and is 0 to 6 hours in this embodiment. The predicted value (i) is the predicted value of the predicted time i, and the corrected predicted value (i) is the predicted value (predicted solar radiation amount) corrected by the function 40. The predicted value (0) is a predicted value of the predicted date and time that matches or substantially matches the date and time when the observed value was obtained.

  Whereas the point predicted solar radiation data in the file 58 is the global solar radiation amount, the solar cell is generally installed in an inclined direction in consideration of power generation efficiency and snowfall. The inclination direction of the solar cell may be fixed or may be automatically changed so as to follow the sun. However, in the case of a scale equipment, the direction is generally fixed.

  The amount of solar radiation is divided into a directly achieved component directly incident from the sun, a scattering component 1 scattered in the atmosphere, and a scattering component 2 reflected and incident on the ground. The total solar radiation for the horizontal plane is the sum of the directly achieved component and the scattering component 1. However, in the case of a panel with an inclination angle, if the scattering component 2 from the ground is further added, it becomes nearly perpendicular to the sun. , The direct achievement increases. For the calculation of the directly achieved component and the scattering component incident on the surface having such an inclination angle, the Perez model or “Amedas Meteorological Data” p. The Erbs model described in H.341 can be used, and these models are also used in this embodiment.

  The solar position calculation function 42 of the CPU 10 uses the latitude and longitude information of the prediction target point (X, Y) and the prediction date and time of the point prediction solar radiation data file 58 to calculate the amount of solar radiation outside the atmosphere and the sun direction at the prediction date and time of the prediction target point. And calculate the solar altitude.

  The direct divergence separation function 44 of the CPU 10 refers to the amount of solar radiation outside the atmosphere at the prediction date and time, the sun azimuth and the solar altitude calculated by the solar position calculation function 42, and the point predicted solar radiation of the same prediction date and time from the file 58. The total solar radiation amount indicated by the quantity data is separated into direct solar radiation amount and scattered solar radiation amount.

  And the inclined surface solar radiation amount calculation function 46 of CPU10 is the inclination angle and azimuth | direction of a solar cell, the solar radiation amount outside the atmosphere by the solar position calculation function 42, the solar azimuth | direction and the solar altitude, the direct solar radiation amount and scattering from the direct scattering separation function 44 From the solar radiation amount and the total solar radiation amount indicated by the point predicted solar radiation amount data of the predicted date and time from the file 48, an inclined surface solar radiation amount (predicted inclined surface solar radiation amount) incident on the solar cell is calculated.

  The predicted inclined surface solar radiation amount of the predicted dates and times tc to tf obtained in this way is displayed and printed by the display printing device 60, and becomes a power generation plan document. The display printing device 60 includes an image display device, a printer, or both.

  Of course, the hard disk 50 and the files 52 to 58 recorded here may exist locally or on the network, and the files 52 to 58 need to be recorded on a single recording medium. There is no.

  Although the invention has been described with reference to specific illustrative embodiments, various modifications and alterations may be made to the above-described embodiments without departing from the scope of the invention as defined in the claims. This is obvious to an engineer in the field to which the present invention belongs, and such changes and modifications are also included in the technical scope of the present invention.

10: CPU
12: Insolation amount mesh data 14: Insolation amount observation value 16: Clear daytime solar radiation amount theoretical value 18: Topographic data 20: Prediction date and time clear solar radiation amount theoretical value 22: Prediction point latitude / longitude data 24: Prediction point point Observed solar radiation value 26: Latitude / longitude data 28 of the prediction target point 28: Solar cell tilt angle / azimuth 30: Solar radiation correction function 32: Solar radiation / pseudo precipitation conversion function 34: Pseudo precipitation movement deformation prediction function 36: All Solar radiation conversion function 38: Prediction target point extraction function 40: Correction function 42: Solar position calculation function 44: Direct scattering separation function 46: Inclined solar radiation calculation function 50: Hard disk 52: Pseudo precipitation data file 54: Prediction simulation Precipitation data file 56: Predicted solar radiation data file 58: Predicted solar radiation data file 60: Display printing device

Claims (15)

Observation value input means (30) for inputting solar radiation observation value data of a predetermined area including a prediction target point in a past predetermined period retroactive from the present;
A solar radiation / meteorological element conversion means (32) for referring to the theoretical value of sunny solar radiation and converting the observed solar radiation data into temporal and spatial distribution data of weather elements that interfere with the solar radiation;
A movement deformation prediction means (34) for referring to the topography of the predetermined area and predicting temporal and spatial movement and deformation of the temporal and spatial distribution data of the weather element obtained by the solar radiation amount / meteorological element conversion means; ,
Insolation amount conversion means (36) for converting the data of the meteorological element predicted by the movement deformation prediction means into a predicted global solar radiation amount with reference to a theoretical value of sunny solar radiation on the corresponding date and time.
The solar radiation amount prediction apparatus characterized by comprising.   The observation value input means inputs a solar radiation amount observation value observed by a different means for at least one of the predetermined area and the predetermined period, and corrects any solar radiation amount observation value with another solar radiation amount observation value. The solar radiation amount prediction apparatus according to claim 1, further comprising: means.   The solar radiation amount forecasting device according to claim 1 or 2, wherein the meteorological element is a pseudo precipitation amount indicating the precipitation amount in a pseudo manner.   The solar radiation amount prediction according to any one of claims 1 to 3, further comprising correction means for correcting the predicted global solar radiation amount of the prediction target point according to an observation value of the prediction target point. apparatus.   Furthermore, it has an inclined surface solar radiation amount calculating means (42 to 46) for calculating the solar radiation amount incident on the solar cell by referring to the inclination angle and direction of the solar cell from the predicted global solar radiation amount of the solar cell installation point. The solar radiation amount prediction apparatus according to any one of claims 1 to 4, wherein: An observation value input step (30) for inputting the solar radiation amount observation value data of a predetermined area including the prediction target point in the past predetermined period from the present to the computer;
A solar radiation amount / meteorological element conversion step (32) in which the computer converts the solar radiation amount observation value data into temporal and spatial distribution data of the weather element disturbing the solar radiation amount with reference to the theoretical value of the sunny solar radiation amount. When,
A movement deformation prediction step in which the computer refers to the topography of the predetermined area and predicts temporal and spatial movement and deformation of the temporal and spatial distribution data of the weather element obtained by the solar radiation / meteorological element conversion step. (34)
A solar radiation amount conversion step (36) in which the computer converts the data of the meteorological element predicted by the movement deformation prediction step into a predicted global solar radiation amount with reference to the theoretical value of the sunny solar radiation amount at the corresponding date and time.
The solar radiation amount prediction method characterized by comprising.   The observation value input step is a step in which the computer inputs any one of the solar radiation observation values of a plurality of types of solar radiation observation values observed by different means for the predetermined area and / or the predetermined period. The solar radiation amount prediction method according to claim 6, further comprising a step of correcting with the amount observation value.   The solar radiation amount prediction method according to claim 6 or 7, wherein the meteorological element is a pseudo precipitation amount indicating the precipitation amount in a pseudo manner.   The computer according to any one of claims 6 to 8, further comprising a correction step of correcting the predicted global solar radiation amount at the prediction target point according to an observation value at the prediction target point. Solar radiation amount prediction method.   Further, the computer includes an inclined surface solar radiation amount calculating step for calculating the solar radiation amount incident on the solar cell by referring to the inclination angle and direction of the solar cell from the predicted global solar radiation amount at the solar cell installation point. The solar radiation amount prediction method according to claim 6, wherein the solar radiation amount is predicted. A solar radiation amount prediction program for predicting solar radiation amount using a computer,
An observation value input function (30) for inputting solar radiation observation value data of a predetermined area including a prediction target point in a past predetermined period retroactive from the present;
A solar radiation / meteorological element conversion function (32) for converting the observed solar radiation amount data into temporal and spatial distribution data of a weather element that disturbs the solar radiation amount with reference to the theoretical value of the sunny solar radiation amount;
A movement deformation prediction function (34) that refers to the topography of the predetermined area and predicts temporal and spatial movement and deformation of the temporal and spatial distribution data of the weather element obtained by the solar radiation / meteorological element conversion function; ,
A solar radiation amount conversion function (36) for converting the data of the meteorological element predicted by the movement deformation prediction function into a predicted global solar radiation amount with reference to a theoretical value of sunny solar radiation at the corresponding date and time.
The solar radiation amount prediction program characterized by realizing.   The observation value input function causes the computer to input an observation value of solar radiation observed by different means for at least one of the predetermined area and the predetermined period, and any one of the solar radiation observation values is measured by another solar radiation observation value. The solar radiation amount prediction program according to claim 11, further comprising a correction function for correcting the solar radiation amount.   The solar radiation amount prediction program according to claim 11 or 12, wherein the meteorological element is a pseudo precipitation amount indicating the precipitation amount in a pseudo manner.   Furthermore, the said computer implement | achieves the correction | amendment function which correct | amends the said prediction global solar radiation amount of the said prediction target point according to the observation value of a prediction target point, The any one of Claim 11 thru | or 13 characterized by the above-mentioned. Solar radiation forecast program.   An inclined surface solar radiation amount calculation function (42 to 42) further causing the computer to calculate the solar radiation amount incident on the solar cell with reference to the inclination angle and direction of the solar cell from the predicted global solar radiation amount at the solar cell installation point. 46) is implemented, The solar radiation amount prediction program of any one of Claims 11 thru | or 14 characterized by the above-mentioned.

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