JP3392506B2 - Solar power generation simulator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photovoltaic power generation simulator that can simulate the characteristics of various photovoltaic power generators.

[0002]

2. Description of the Related Art A conventional simulation device will be described. The formula showing the characteristics of the solar cell is shown below.

[Equation 1] Here, I _o and K are constants, I _sh , R _s , and R _sh are values determined by illuminance and temperature, and I and V are current and voltage, respectively. Since a complicated formula such as this formula requires a large amount of calculation, it is difficult to find a solution in real time except for employing a very high-speed computer. Since it is very expensive to adopt such an ultra-high-speed computer, conventionally, in the above calculation, the calculation result is obtained in advance before the simulation starts, the result is stored in the memory, and the data is stored in the data. The characteristics were simulated based on it.

This conventional configuration will be described with reference to FIG.
Reference numeral 15 denotes a solar cell simulation device, and the storage device 10 stores voltage / current data indicating a pre-calculated solar power generation (hereinafter referred to as PV) characteristic. The interpolator 5 uses this P
The current d corresponding to the voltage currently output is calculated so as to match the V characteristic. The interpolator 5 outputs the current d to the output amplifier 6 as a set value. The output amplifier 6 controls the current to the inverter 8 according to this current setting. But,
The inlet voltage of the inverter 8 changes depending on the state of the load 9. This voltage is input to the interpolator 5 through the converter 7. With this change, the interpolation device 5 sets a new current again.

The details of the interpolator 5 will be described with reference to FIGS. 15 and 16. Note that although FIG. 15 and FIG. 16 are continuous figures, the figure numbers are separated for convenience. The interpolation device 5 starts control when the power is turned on. The interpolator 5 inputs PV characteristic data from the storage device (S101). Next, the voltage feedback g is input and substituted into V _F (S102). As a counter initial setting, x is set to 0 (S103). Table showing the contents of the voltage value V _x storage device 10 at the counter x (Fig. 1
7) and set to V _L (S104). Counter x
Is counted up (x = x + 1) (S105), the corresponding voltage value V _x is calculated and set to V _P (S106).
).

The current voltage feedback g is this V _L
And V _P are determined (S107). If it is not in the interval (in the case of No), the value of V _P is substituted into V _L (S104 ′), the count is again performed (S105), V _P is set again (S106), and the determination is made again (S106). S107) is implemented. In this way, the voltage range in which the current feedback voltage g is included is obtained. If S107 is satisfied, calculation of the current value is started. First, the current value I corresponding to V _L
L is obtained from PV data (S108). Then, in FIG. 16, a current value I _P corresponding to V _P is obtained (S109).
In order to perform linear interpolation between these points, a straight line passing through two points is obtained (S110).

Assuming that this straight line is y = a · x + b,

## EQU2 ## a = (I _P −I _L ) / K b = (I _L · V _P −V _L · I _P ) / K (2) where K = 1 / (V _P −V _L ). Calculation is performed according to this formula. From this linear equation, the current I _R according to the characteristic at the current feedback voltage value V _F is obtained by the equation (3) (S111).

## EQU3 ## I _R = aV _F + b (3) The resulting I _R is output to the interpolator 5 (S112).
).

As described above, the interpolator 5 can derive an output according to the relationship between voltage and current according to the characteristics of PV. Further, the output amplifying device 6 is used to implement the output to the inverter 8. When the measured value g of the voltage e measured by the converter 7 is different from the above feedback voltage g due to the current I _R output here, the above operation is further repeated to output the output voltage and current value of the output amplifier 6. Is in equilibrium. In this way, the solar cell was simulated.

[0008]

According to the above-mentioned prior art, the simulation can be performed only when the PV characteristic has a certain specific condition, and the test simulating the actual operation cannot be performed. The present invention has been made in view of the above circumstances, and an object thereof is to provide a solar power generation simulation device that can simulate a solar cell under various sunshine conditions.

[0009]

A photovoltaic power generation simulation device according to claim 1 of the present invention is a photovoltaic power generation that simulates the output of photovoltaic power generation by using photovoltaic power generation characteristic (hereinafter referred to as PV characteristic) data. In the simulation device, a sunshine calculation device that simulates the sunshine amount and temperature of sunlight, and a solar characteristic calculation device that obtains a current / voltage characteristic of solar power generation using each of the data,
A plurality of storage devices for storing the calculation results as table data (voltage / current data) and a first storage device provided between the solar characteristic calculation device and the storage devices to switch between the storage devices. A switching device, an interpolation period for calculating a current value corresponding to a voltage value currently output based on the table data so as to match the PV characteristic, and a switching device provided between the storage device and the interpolation device. A second switching device for switching the storage device to output to the interpolating device, an output amplifying device for inputting a set current from the interpolating device, and the first and second switching devices are operated in association with each other. And a switching control device.

A solar power generation simulation device according to a second aspect of the present invention is a solar power generation simulation device that simulates the output of solar power generation using PV characteristic data. A calculating device, a PV parameter calculating device that calculates a plurality of parameters included in a PV characteristic formula according to conditions, a parameter storage device that saves each calculated parameter value, and an exponential function value included in the PV characteristic formula. An exponential function storage device, a PV characteristic calculation device for calculating a PV characteristic formula with reference to the stored parameter values, exponential function values, and currently output voltage values, and the PV characteristic calculation And an output amplifying device for inputting a set current from the device.

A solar power generation simulation device according to a third aspect of the present invention is a solar power generation simulation device that simulates the output of solar power generation using PV characteristic data. A calculation device, a sunshine temperature data input / output device for inputting arbitrary sunshine temperature data from the sunshine calculation device, and a theoretical formula storage device for storing a theoretical formula representing the relation between current and voltage of solar power generation and the theoretical formula storage device. Substituting the sunshine temperature data from the sunshine temperature data input / output device into the theoretical formula according to the above, and outputting the PV characteristic data calculation device and the PV characteristic data to a plurality of storage devices to obtain the current / voltage characteristics of the photovoltaic power generation. A PV calculation device having a PV characteristic data output device; and a third switching device provided between the PV calculation device and each of the storage devices to switch between the storage devices for use. An interpolating device that calculates a current value corresponding to a voltage value that is currently output so as to match the PV characteristics in the memory device, and is provided between the memory devices and the interpolating device to switch between the memory devices. A fourth switching device for outputting to the interpolating device and a switching control device for operating the third and fourth switching devices in conjunction are provided.

[0012]

The solar power generation simulator according to [Claim 1] of the present invention creates changes in sunshine and temperature based on measured data,
The solar power generation characteristics are calculated according to the data. The calculation result is stored in the memory, and the interpolator determines the current to be output by using the output voltage as the feedback in accordance with the characteristic indicated by the memory data. At this time, the characteristics of the photovoltaic power generation change as the sunlight and temperature change with time. However, since the interpolator performs the output by relating the current to the voltage according to the photovoltaic power generation characteristic, it is impossible to set the change of the photovoltaic power generation characteristic according to the change of the sunshine and the temperature as it is.

Therefore, another storage device is prepared separately from the storage device to which the interpolation device is inputting, and the solar power generation characteristics are stored in this memory. By switching this storage device each time the sunshine or temperature is changed and updated, it is possible to set the photovoltaic power generation characteristics of various characteristics without interpolating the interpolation function. However, when switching and using in this way, the discontinuity of data at the time of switching becomes a problem. However, in this case, since the sunshine and temperature changes are slow changes in the unit of time, the fluctuation amount is sufficiently small compared to the cycle of the interpolator, and the fluctuation of the photovoltaic power generation characteristics when switching the storage device is significant. Don't

The solar power generation simulation device according to [Claim 2] of the present invention uses the PV characteristic formula (1) in the PV parameter calculation device.
A plurality of parameters included in the formula are calculated from conditions such as temperature and sunshine, and stored in the parameter storage device. Calculation and storage of this parameter are performed at any time. Then, the PV characteristic calculation device calculates the PV characteristic expression, and at this time, the parameters are read and used. The calculation of the exponential function included in the PV characteristic formula is performed by referring to the function value table recorded in the exponential function storage device.
It is used together with the characteristic calculation device. Based on the calculation result of the PV characteristic calculation device, electric power for realizing the PV characteristic is output.

In the solar power generation simulation device according to [Claim 3] of the present invention, the sunshine temperature data from the sunshine calculation device is input to the sunshine temperature data input / output device by the PV calculation device. The sunshine temperature data input / output device sends the sunshine temperature data to the PV characteristic data calculation device. At this time, the PV characteristic data calculation device calls a theoretical formula indicating the relationship between the voltage and the current of the photovoltaic power generation stored in the theoretical formula storage device, and substitutes the illuminance and the temperature of the sunshine temperature data into this theoretical formula, The PV characteristic data with a small amount of data and capable of showing the PV characteristic with high accuracy is calculated. The calculated PV characteristic data is sent to the PV characteristic data output device, from which it is output at high speed to the switching storage device.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the solar power generation simulation device according to [Claim 1] of the present invention will be described with reference to FIG. Figure in Figure 1
The same parts as 14 are designated by the same reference numerals and the description thereof is omitted. 1 is a sunshine calculation device which measures and stores sunshine temperature data. 2 is a PV calculation device which inputs sunshine temperature data and calculates solar power generation characteristic data. 20 is a switching storage device, 2
It has one switching device 3, 4, two storage devices 10, 11, and a switching control device 12. The operation of the switching storage device is as follows.

First, the data from the PV calculation device 2 is first inputted and stored in the storage device 10 selected by the switching device 3. When the data storage in this storage device is completed, the switching control device 12 issues a switching request to the switching device 3. Switching control device
12 synchronously issues a switching request to the other switching device 4.
In response to the switching request, the switching device 4 that has received this request receives the interpolation device 5
The input paths of the storage devices 10 and 11 to be input to are switched. The rest of the configuration is the same as in FIG.

The operation of claim 1 of the present invention will be described with reference to FIG. First, the sunshine calculation device 1 stores the actually measured sunshine temperature data, and when the simulation is started, the measured data is measured in PV at a basic cycle according to the actual time.
The sunshine temperature data a is output to the calculation device 2. The PV calculation device 2 that has received the sunshine temperature data a calculates the photovoltaic power generation characteristics according to the sunshine temperature data a. The calculation formula is shown in Eq. (1). The result of this calculation is a curve shown in schematic FIG. 17, but if this graph itself is stored, the data size etc. becomes too large and it is not practical.

Therefore, the data is set to a predetermined voltage. That is, this result is expressed in the data shown in the table of FIG. When the calculation by the PV calculation device 2 is completed, the PV characteristic data b1 of the calculated result is output and stored in the storage device 10. The PV calculation device 2 stores the calculated data in a storage device.
After the data is stored in 10, the switching control device 12 outputs the data of the end of storage in the storage device. Upon receiving this output, the switching control device 12 outputs a switching request to the switching device 3. The switch 3 is switched by a flip-flop, and PV characteristic data
b2 and PV characteristic data b3 are selected in order.

As a result, the PV characteristic data b1 switches the data flow to the PV characteristic data b3. When the switching control device 12 outputs a switching request to the switching device, it outputs a switching completion request to the PV computing device 2. When the PV calculation device 2 reads this completion data, new sunshine temperature data a is input again, and new data is calculated accordingly. Upon completion of the calculation, the data is output to the newly selected storage device 11 this time. After the output, the switching request is output again to the switching device 3.

On the other hand, the interpolator 5 performs almost the same processing as the conventional one, but in the present invention, the operation is changed as follows so that the storage device can be properly switched. Since switching cannot be performed while the interpolator 5 is inputting either the storage device 10 or 11, a switching permission flag indicating that PV characteristic data is being input is provided. This situation will be described with reference to FIGS. Although FIG. 2 and FIG. 3 are only one drawing, they are shown separately for convenience. When the interpolator 5 starts, the switching permission flag is cleared (S201). After clearing, PV characteristic data is input from the storage device 10 or 11 (S101). When the input from the storage device is completed, the switching permission flag is set (S202). After that, the same interpolation calculation as the conventional one is performed.

The operation of the switching control device 12, which is the feature of this time, will be described with reference to FIG. Since the switching control device 12 wants to operate when the calculation is completed by the PV calculation device 2,
The switching request from the computer 2 is input (S150). The presence / absence of this request is checked (S151).
The request from the computer 2 is input again for checking (S150). If there is a request, input is made as to whether or not permission has been given from the interpolating device 5 (S152).

The presence / absence of permission input is checked (S153),
If the permission is not input here, the permission is input again to wait for permission (S152). If permission is given, the output is output so as to be switched to the switch 3 or the switch 4, and the switching is performed at the same time (S154). Further, in order to request a new calculation to the PV calculation device 2 again, the completion of switching is set by P.
It is output to the V calculation device 2 (S155).

According to [Claim 1] of the present invention, since the conventional calculation can be performed only by a high-performance computer, the simulation can be performed only with certain specific data. It is possible to use it as an effective simulator because it is possible to set various changing data in real time at low cost with a powerful computer.

An embodiment of the solar power generation simulation device according to [Claim 2] of the present invention will be described with reference to FIG. In this embodiment, an arithmetic unit such as a microprocessor is used to faithfully simulate the situation where the output changes with time. 5, parts that are the same as those in FIG. 1 are given the same reference numerals, and descriptions thereof will be omitted. 2-1 is a PV parameter calculation device, which is a PV required for calculating the PV characteristic formula (1).
Calculate the parameter M. The PV parameter M is as described above.

Since the PV characteristic calculation device 31 calculates the equation (1), the parameter storage device 30 and the exponential function storage device 32 are used.
See the contents of. The PV characteristic calculation device 31 calculates the calculated current value d corresponding to the voltage output feedback value g obtained via the converter 7. An exponential function storage device (hereinafter referred to as an exp storage device) is a device in which the exponential function in the equation (1) is calculated in advance and stored in a table format. Other configurations are the same as those in FIG.

The operation of the embodiment according to [Claim 2] of the present invention will be described with reference to FIG. The sunshine calculation device 1 obtains the temperature and sunshine data a as shown in FIGS.
Enter. The PV parameter calculation device 2-1 uses the sunshine temperature data a to calculate the parameters I _sh and I in the equation (1).
Calculate _o , R _s , R _sh (denoted by M in FIG. 5). This calculation considers the properties of the materials used for the solar cell,
This can be performed relatively easily by using a calculation formula obtained theoretically or experimentally.

Since the temperature and the sunshine change with time as shown in FIG. 6, the solar cell simulator 15
It is necessary to simulate PV so that the output of the PV changes. Therefore, the PV parameter calculation device 2-1 repeats the calculation of the parameter M at a constant cycle such that the change is not too large, and the progress thereof is stored in the parameter storage device 30.
Save in the format shown in (A).

As shown in FIG. 7B, the exponential function storage device 32 is one in which exponential function values are calculated in advance and stored in a table format. By giving a variable h,
The exponential function value l = exp (h) is obtained.

FIG. 8 is a flowchart showing the processing contents of the PV characteristic calculation device 31. First, the initial value I _* of I is determined (S81). Next, the parameter M calculated in advance is read. Further, the feedback value g is input to the output voltage e of the PV simulator 15 via the converter 7 and used as V = g (S83). Further, in the equation (1), various parameters I _sh , I _o , K, R _s , and R _sh are used by referring to the contents of the parameter storage device 30 to obtain I (S84).

However, since the equation (1) has the variable I on both sides and cannot simply derive I, a convergence calculation method such as the Newton-Raphson method is used (S86). that time,

[Mathematical formula-see original document] h = K (V + R _* I _* ) (I _* is an expected value of I) Since an exponential function value of h = exp (h) is required, this is referred to the exponential function storage device 32. Get (S85).

In this embodiment, a high speed microprocessor is used. By performing the calculation process as shown in FIG. 8, the calculated value d of the current value to be output by the PV simulator 15 is obtained. This calculated current value d is input to the output amplifier 6.

Although not shown, the output amplifying device 6 is composed of a converter device and tries to supply the output current e corresponding to the calculated current value d as the output power.
A deviation occurs between the output voltage at this time and the voltage value g used when calculating the calculated current value d (especially when the magnitude of the load on the load side is changing).

For this reason, the PV characteristic calculation device 31 performs a process of feeding back the voltage value repeatedly to calculate and output the calculated current value d (S88). This repetitive calculation and output operation are performed in a very short cycle (cycle of the order of μsec), and the output voltage and current of the PV simulator 15 satisfy the formula (1), that is, the PV characteristic is realized. Immediately settle into an equilibrium state like that. Thus, in the embodiment of [Claim 2] according to the present invention, the output of solar power generation is realized.

According to the above-described embodiment, an arithmetic unit such as a microprocessor whose performance has been remarkably improved in recent years is used as a part of the control unit to obtain a device that faithfully simulates the output characteristics of the photovoltaic power generation unit. Moreover, it is possible to simulate a situation in which the output changes with time. Therefore, when testing a device that should be a load on the solar cell, it is not necessary to use a real solar cell, and the test can be performed very easily using a simulated device in a limited indoor space. .

FIG. 9 is a block diagram showing an embodiment of the solar power generation simulator according to [Claim 3] of the present invention. 9, the same parts as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, 2-2 is a PV computer,
This PV calculation device calculates the sunshine temperature data a from the sunshine calculation device 1
From the sunshine temperature data input / output device 500 which is input from the PV characteristic data calculation device 502 and the theoretical formula ((1) formula) that represents the relationship between the solar power generation current and voltage, and the power is turned on. Then, this theoretical formula ((1)) is output to the PV characteristic data calculation device 502, and the theoretical formula storage device 501 that outputs the sunshine temperature data to the theoretical formula ((1)) is used as a parameter. A PV characteristic data calculation device 502 for calculating PV characteristic data showing PV characteristics with high accuracy and data;
It comprises a PV characteristic data output device 503 which outputs characteristic data to a storage device.

Furthermore, the PV characteristic data calculation device 502 uses the sunshine temperature.
I determined by degree data_sh, R_s, R_shSunshine seeking
Temperature constant calculation device 504 and maximum current I_scAsk for I_scArithmetic
Output device 505 and maximum voltage V_ocAsk for V_ocCalculation device 506
And the maximum power V_op, I _opAsk for V_op-I_opCalculation
Device 507 and other PV characteristics for obtaining voltage V and current I
It is composed of the data creation device 508. Also, switch memory
The switching control device 12 in the device 20 sends the control signal to the switching device 3,
4 is configured to give.

The operation of the PV calculation device 2-2 in the solar power generation simulation device according to [claim 3] of the present invention will be described. 10 and 11 show a flowchart of an embodiment according to [claim 3]. Although FIG. 10 and FIG. 11 are one figure, they are divided into two for convenience. First, PV calculation device 2-2
When the power of the device is turned on (S520), the theoretical storage device 501
Is the theoretical formula ((1)
Equation) is output to the PV characteristic data calculation device 502 (S521).
). Further, the sunshine temperature data input / output device 500 inputs sunshine temperature data a including illuminance and temperature from the sunshine calculation device 1 (S22).

The sunshine temperature data input / output device 500 outputs the input sunshine temperature data a to the sunshine temperature constant calculating device 504 (S523). The sunshine temperature constant calculation device 504 obtains I _sh , R _s , and R _sh from the input sunshine temperature data (S
524). The obtained I _sh , R _s , and R _sh are the I _sc calculation device 505 and the V _oc calculation device 506 of the PV characteristic data calculation means 502.
, V _op −I _op calculation device 507 (S525).
The I _sc calculation device 505 substitutes V = 0 into the theoretical formula (equation (1)) and performs a numerical calculation to obtain the maximum current I _sc (S526).

The V _oc calculation device 506 uses the theoretical formula ((1)) as I
By substituting = 0 and performing numerical calculation, the maximum voltage V
_{Find oc} (S527). V _op −I _op calculation device 507
V _op and I _op that maximize I are calculated ((S528). As a calculation method, first, the voltage V is applied to both sides of the theoretical formula (equation (1)).
Multiply This gives the following equation for the power P.

[0041]

[Equation 5] P = V · I = V · I _sh −V · I _o exp [K
(V + R _s · I)] − V (V + R _s · I) / R _{sh The} maximum point in the above equation is when dP / dI = 0, so by calculating the values of V and I in this case, V _op , I
_{The op} can be calculated (S528).

I _sc and V _oc calculated by the I _sc calculator 505
V _oc calculated by the calculator 506 and V _op −I _op calculator 50
V _op and I _op calculated in step 7 are PV characteristic data creating devices.
It is sent to 508 (S529). PV characteristic data creation device 508
As shown in FIG. 12, when I ≦ I _op , the current is divided into 50 at regular intervals, and the value of this current (I ₁ , I ₂ , ..., I ₄₉ )
Is substituted into the theoretical formula (Formula (1)), and the value of the corresponding voltage (V ₁ , V ₂ , ..., V ₄₉ ) is obtained by performing numerical calculation (S530).

Here, V ₀ = V _oc and V ₅₀ = V _op .
When I ≧ I _op , the voltage is divided into 50 at regular intervals, and the value of this voltage (V ₅₁ , V ₅₂ , ..., V ₉₉ ) is substituted into the theoretical formula (Equation (1)) to perform numerical calculation. The value of the corresponding current (I ₅₁ , I ₅₂ , I ₅₃ , ..., I ₉₉ ) is determined by (S531).
). Here, I ₅₀ = I _op and I ₁₀₀ = I _sc .

The PV characteristic data creating device 508 has obtained I
PV characteristic data as shown in FIG. 13 is created from the data of _{0 to} I ₁₀₀ and V _{0 to} V ₁₀₀ (S532). PV created
The characteristic data is sent to the PV characteristic data output device 503 (S533). The PV characteristic data output device 503 outputs the PV characteristic data to the switching storage device 20 (S534).

According to the above-described embodiment, it becomes possible to calculate the PV characteristic data at high illuminance and temperature which change momentarily. This PV characteristic data can express the PV characteristic with a small amount and with high accuracy.

[0046]

As described above, according to the present invention, a solar cell having various characteristics can be simulated, so that an inverter test using the solar cell as a power source can be efficiently performed regardless of the place and the weather. be able to.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a solar power generation simulation device according to [Claim 1] of the present invention.

FIG. 2 is a flowchart of an interpolation calculation device in an embodiment according to [claim 1] of the present invention.

FIG. 3 is a flowchart of an interpolation calculation device in an embodiment according to [claim 1] of the present invention.

FIG. 4 is a flowchart of a switching control device in an embodiment according to [claim 1] of the present invention.

FIG. 5 is a configuration diagram of an embodiment of the solar power generation simulation device according to [Claim 2] of the present invention.

FIG. 6 is a diagram showing changes in temperature and illuminance with time.

FIG. 7 is a configuration diagram of a storage device according to [claim 2] of the present invention.

FIG. 8 is a flowchart showing the operation of the PV characteristic calculation device according to [claim 2] of the present invention.

FIG. 9 is a configuration diagram of an embodiment of the solar power generation simulation device according to [claim 3] of the present invention.

FIG. 10 is a flowchart of an embodiment according to [claim 3] of the present invention.

FIG. 11 is a flowchart of an embodiment according to [claim 3] of the present invention.

FIG. 12 is an explanatory diagram when a PV characteristic curve and characteristic data of one embodiment according to [claim 3] of the present invention are created.

FIG. 13 is an explanatory diagram of PV characteristic data of one example according to [claim 3] of the present invention.

FIG. 14 is a conventional configuration diagram.

FIG. 15 is a flowchart of a conventional interpolation calculation device.

FIG. 16 is a flowchart of a conventional interpolation calculation device.

FIG. 17 is a configuration diagram of conventional PV storage data.

[Explanation of symbols]

1 sunshine calculation device 2 PV calculation device 3, 4 switching device 5 interpolation device 6 output amplification device 7 converter 8 inverter 9 load 10, 11 storage device 12 switching control device 15 solar cell simulation device 20 switching storage device 30 parameter storage device 31 PV characteristic calculation device 32 Exponential function storage device 500 Sunlight temperature data input / output device 501 Theoretical expression storage device 502 PV characteristic data calculation device 503 PV characteristic data output device 504 Sunlight temperature constant calculation device 505 _Isc calculation device 506 _Voc calculation device 507 V _op −I _op calculation device 508 PV characteristic data creation device

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshikazu Tanba No. 1 Toshiba-cho, Fuchu-shi, Tokyo Inside the Fuchu factory, Toshiba Corporation (56) Reference JP-A-2-128206 (JP, A) JP-A- 13084 (JP, A) JP 59-160218 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G05B 23/00-23/02 H01L 31/04

Claims (3)

(57) [Claims] 1. Solar power generation characteristics (hereinafter referred to as PV characteristics)
A solar power generation simulation device that simulates the output of solar power generation using data, and a sunshine calculation device that simulates the sunshine amount and temperature of sunlight, and the current / voltage characteristics of solar power generation using each of the above data A solar characteristic calculation device, a plurality of storage devices for storing the calculation results as table data (voltage / current data), the solar characteristic calculation device, and
Using switches the respective storage device is provided between the respective storage devices
Based on the table data and the first switching device used
An interpolation period for calculating the current value corresponding to the voltage value currently being output to match the V characteristics, the said respective storage device
Interpolation device by switching between storage devices provided between the device and the interpolation device
A second switching device for outputting to the output, an output amplifying device for inputting a set current from the interpolating device, and the first and second
And a switching control device for operating the switching devices in conjunction with each other . 2. A solar power generation simulation device for simulating the output of solar power generation using PV characteristic data, and a sunshine calculation device for simulating the sunshine amount and temperature of sunlight, and a plurality of parameters included in the PV characteristic formula. and PV parameter calculation unit for calculating in accordance with the conditions, and a parameter storage device for storing the parameter values that are the calculated and exponential storage device for storing the exponential value included in the PV characteristic equation, which is the storage PV for calculating the PV characteristic formula by referring to each parameter value, exponential function value and voltage value currently output PV
A photovoltaic power generation simulation device comprising: a characteristic calculation device; and an output amplification device for inputting a set current from the PV characteristic calculation device. 3. A solar power generation simulation device for simulating the output of solar power generation using PV characteristic data, and a sunshine calculation device for simulating the sunshine amount and temperature of sunlight, and an arbitrary sunshine temperature from the sunshine calculation device. A theoretical formula storage device for storing a theoretical formula representing the relationship between the sunshine temperature data input / output device for inputting data and the current / voltage of photovoltaic power generation and the theoretical formula storage device
The sunshine temperature or data input-output device based on the theoretical expression by
A PV characteristic data calculating apparatus for substituting the sunshine temperature data for obtaining the current / voltage characteristics of photovoltaic power generation, and a PV characteristic data outputting apparatus for outputting the PV characteristic data to a plurality of storage devices ; The PV computing device and the
It is provided between each storage device and used by switching each storage device.
The third switching device used and the PV characteristics in the storage device.
Current value corresponding to the voltage value currently output to match
Interpolating device for calculating, and each storage device and the interpolating device
It is installed between and to switch each storage device and output to the interpolator.
A fourth switching device for storing the switching device, and the third and fourth switching devices.
A solar power generation simulation device, comprising: a switching control device that operates the device in conjunction with each other .