JP7179597B2 - Design support equipment for photovoltaic power generation systems - Google Patents

Description

The present invention relates to a photovoltaic system design support device that provides design support when installing a photovoltaic system into a building.

A photovoltaic power generation system may be installed in a building such as a house. A photovoltaic power generation system includes a photovoltaic power generation device that generates photovoltaic power and a power conversion device that converts the power generated by the photovoltaic power generation device from direct current to alternating current. A photovoltaic power generation device includes a plurality of photovoltaic modules (solar panels), and each of these photovoltaic modules is installed, for example, on the roof surface of a building. Also, the power converter is configured with one or more power conditioners.

By the way, in recent years, some design support systems have been proposed for providing design support when introducing a photovoltaic power generation system into a building (see Patent Document 1, for example). In such a design support system, first, the solar modules constituting the solar power generator are allocated (the number and arrangement) on the roof surface of the building. In this module allocation, the solar modules are allocated on the roof surface so that the power generation capacity of the solar power generation system is maximized, for example.

Then, the selection of the power conditioner that constitutes the power converter is performed. Power conditioners have a plurality of specifications with different capacities of power that can be input from a photovoltaic power generation device (hereinafter referred to as input capacities). Here, when selecting the power conditioners that make up the power converter, for example, the input capacity of the power converter (that is, the total input capacity of the power conditioners that make up the device) is the power generation capacity of the photovoltaic power generation device. Selection is performed so as to satisfy the above. In this case, all the power generated by the solar power generation device can be converted into AC power by the power conversion device, so that the power generated by the solar power generation device can be used without waste. .

Thus, by using the design support system described above, it is possible to allocate solar modules and select power conditioners according to the building (roof). Therefore, it is possible to propose to a customer a photovoltaic power generation system suitable for the building in which the customer lives.

JP-A-2004-164325

By the way, in the design support system described above, when selecting a power conditioner, the selection is made so that the input capacity of the power conversion device is greater than or equal to the power generation capacity of the solar power generation device. The power generation capacity of the photovoltaic power generation system (whole) is determined by the power generation capacity of the photovoltaic power generation device, which is the capacity on the lower side of the available capacity and the power generation capacity of the photovoltaic power generation device. That is, in this case, the power generation capacity of the photovoltaic power generation device becomes the power generation capacity of the photovoltaic power generation system as it is.

Here, of the inputtable capacity of the power conversion device, the portion exceeding the power generation capacity of the photovoltaic power generation device is wasted surplus capacity that is not used for power conversion. In other words, this surplus capacity is wasted capacity that does not contribute to the power generation of the photovoltaic power generation system. If the surplus capacity is large, the cost for the power generation (power generation capacity) of the solar power generation system (in other words, the cost per unit power generation) becomes unnecessarily high, so a system with poor cost effectiveness is proposed to the customer. It's going to be.

Therefore, when selecting a power conditioner, it is desirable that the selection be made so as to minimize the surplus capacity of the power converter. In other words, it is desirable that the selection be made so that the difference (capacity difference) between the inputtable capacity of the power conversion device and the power generation capacity of the solar power generation device is as small as possible.

However, since the input capacity of the power converter is determined by the combination and number of power conditioners to be selected, fine adjustment is considered difficult. Therefore, depending on the value of the power generation capacity of the photovoltaic power generation system, it may be difficult to select a power conditioner that minimizes the difference between the input capacity of the power converter and the power generation capacity of the photovoltaic power generation system. be done. In that case, the surplus capacity of the power converter becomes large, and a poor (low) cost-effective photovoltaic power generation system is proposed to the customer.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide a photovoltaic power generation system design support device capable of proposing a cost-effective photovoltaic power generation system to a customer. is.

In order to solve the above problems, a design support device for a photovoltaic power generation system according to a first aspect of the present invention includes a photovoltaic power generation device configured to have a plurality of photovoltaic modules and performing photovoltaic power generation, and one or more power conditioners. and a power conversion device that converts the power generated by the solar power generation device from direct current to alternating current, and provides design support when introducing the solar power generation system into a building. In a design support device, an installation surface information acquisition unit acquires information on an installation surface on which the solar module is installed in the building, and based on the installation surface information acquired by the installation surface information acquisition unit, a first module allocating means for allocating the solar modules constituting the solar power generation system on the installation surface; and the solar power generation system comprising the solar modules allocated by the first module allocating means. power generation capacity calculation means for calculating the power generation capacity of the solar power generation device, and the power generation capacity of the solar power generation device for which the input possible capacity, which is the power capacity that can be input from the solar power generation device for the power conversion device, is calculated by the power generation capacity calculation means A power conditioner selecting means for selecting the power conditioner constituting the power conversion device so as to be smaller than the capacity; a second module allocating means for allocating the photovoltaic modules constituting the photovoltaic power generation device on the installation surface so that the capacity is equal to or less than the input capacity of the power conversion device configured by the solar power generation device. Characterized by

According to the present invention, the solar modules constituting the solar power generation device are allocated on the installation surface (hereinafter referred to as first allocation) based on the acquired information on the installation surface of the building. Also, the power generation capacity is calculated for the photovoltaic power generation device obtained by the first allocation. The acquired installation surface information includes, for example, information regarding the size and shape of the installation surface.

Also, the power conditioner that constitutes the power converter is selected such that the inputtable capacity of the power converter is smaller than the calculated power generation capacity of the solar power generator. Then, the solar modules constituting the solar power generation device are allocated on the installation surface so that the power generation capacity of the solar power generation device is equal to or less than the input capacity of the power conversion device configured by the selected power conditioner. (hereinafter referred to as second allocation) is performed.

Here, the power generation capacity of the photovoltaic power generation device can be adjusted relatively finely according to the number and size of the photovoltaic modules to be allocated. Therefore, when allocating solar modules (second allocation) so that the power generation capacity of the solar power generation device is equal to or less than the input capacity of the power conversion device, the input capacity of the power conversion device and the solar power generation device It is possible to perform the allocation so that the difference in capacity from the power generation capacity is as small as possible or there is no difference in capacity. As a result, it is possible to minimize useless surplus capacity in the power converter or eliminate the surplus capacity, so it is possible to propose a highly cost-effective photovoltaic power generation system to customers. Become.

A design support device for a photovoltaic power generation system according to a second aspect of the invention is, in the first aspect, wherein the first module allocation means selects the photovoltaic power generation device such that the power generation capacity of the photovoltaic power generation device is maximized. It is characterized in that the solar modules to be constructed are allocated on the installation surface.

According to the present invention, as the first allocation, the solar modules are allocated on the installation surface so that the power generation capacity of the solar power generation device is maximized. Then, based on the photovoltaic power generation device obtained by the first allocation, the selection of power conditioners and the second allocation of solar modules are performed. As a result, it becomes possible to propose to customers a photovoltaic power generation system that has a large power generation capacity and is highly cost-effective.

A photovoltaic power generation system design support device according to a third aspect of the present invention is the power generation capacity of the photovoltaic power generation device configured by the photovoltaic modules allocated by the second module allocation means in the first or second invention. as the power generation capacity of the photovoltaic power generation system, the cost of the power conversion device configured by the power conditioner selected by the power conditioner selection means, and the second module allocation means a system cost calculation means for calculating the cost of the solar power generation device configured by the solar modules allocated by each, and calculating the sum of the calculated costs as the cost of the solar power generation system; It is characterized by having

According to the present invention, since the power generation capacity and the cost of the photovoltaic power generation system are calculated, it is possible to numerically show the cost-effectiveness of the photovoltaic power generation system to the customer.

A photovoltaic power generation system design support device according to a fourth aspect of the invention is, in any one of the first to third aspects of the invention, wherein the second module allocating means is arranged on the installation surface by the first module allocating means. The solar modules are allocated on the installation surface by removing a part of each solar module.

According to the present invention, the second allocation of the solar modules is performed by removing some of the solar modules allocated on the installation surface by the first allocation. This makes it possible to perform the second allocation relatively easily.

A design support device for a photovoltaic power generation system of a fifth invention is the photovoltaic power generation system in any one of the first to fourth inventions, wherein the inputtable capacity of the power conversion device is calculated by the power generation capacity calculation means. A first power conditioner selection means for selecting the power conditioner constituting the power conversion device so as to be equal to or greater than the power generation capacity of the device, and the solar module allocated by the first module allocation means. and the cost of the power conversion device configured by the power conditioner selected by the first power conditioner selection means, and the sum of the calculated costs and a first cost calculation means for calculating the cost of the solar power generation system, wherein the power generation capacity of the solar power generation system, the cost of which is calculated by the first cost calculation means, is calculated by the power generation capacity calculation means. It corresponds to the power generation capacity of the photovoltaic power generation device, and the first cost calculation means calculates the cost of the photovoltaic power generation system based on the calculated cost of the photovoltaic power generation system and the power generation capacity of the photovoltaic power generation system. When the cost per unit generation capacity calculated by the first cost calculation means exceeds the reference value, the second power conditioner as the power conditioner selection means A selection process of the power conditioner by a selection means and an allocation process of the solar modules by the second module allocation means are performed respectively.

In the above-described configuration in which the first allocation and the second allocation are performed as the allocation of the solar modules on the installation surface, the power generation capacity of the solar power generation device obtained by the first allocation is obtained by the second allocation. The power generation capacity of the photovoltaic power generation device is smaller. In other words, the power generation capacity of the photovoltaic power generation device obtained by the first allocation is larger than the power generation capacity of the photovoltaic power generation device obtained by the second allocation.

Therefore, in the present invention, after the power generation capacity of the photovoltaic power generation device obtained by the first allocation is calculated (by the power generation capacity calculation means), first, the input of the power conversion device (by the first power conditioner selection means) The power conditioners constituting the power conversion device are selected so that the available capacity is greater than or equal to the calculated power generation capacity of the photovoltaic power generation device. In this case, all the power generated by the photovoltaic power generation device is converted by the power conversion device, making it possible to obtain a photovoltaic power generation system with a relatively large power generation capacity.

Then, in the present invention, the cost per unit power generation capacity of the photovoltaic power generation system thus obtained is calculated. The cost per unit power generation capacity is an index showing the cost-effectiveness of the photovoltaic power generation system, and the lower the cost, the higher the cost-effectiveness. In this case, the cost-effectiveness of the solar power generation system obtained as described above can be confirmed, so if the cost-effectiveness is high, the generation capacity is relatively large and the cost-effectiveness It can provide customers with solar power generation systems.

In addition, if the cost per unit power generation capacity calculated as described above exceeds the reference value, that is, if the cost effectiveness of the solar power generation system obtained as described above is low, the second power conditioner The selection of the power conditioner by the power conditioner selection means (corresponding to the power conditioner selection means of claim 1) and the second allocation of the photovoltaic modules are performed respectively. As a result, in any case, it is possible to provide customers with a highly cost-effective photovoltaic power generation system.

A design support device for a photovoltaic power generation system of a sixth invention is the photovoltaic power generation system in any one of the first to fourth inventions, wherein the inputtable capacity of the power conversion device is calculated by the power generation capacity calculation means. By the first power conditioner selection means for selecting the power conditioner constituting the power conversion device so as to be equal to or greater than the power generation capacity of the device, and the power conditioner selected by the first power conditioner selection means capacity difference calculation means for calculating a capacity difference between the inputtable capacity of the configured power conversion device and the power generation capacity of the photovoltaic power generation device calculated by the power generation capacity calculation means, wherein the capacity difference When the capacity difference calculated by the calculation means exceeds a predetermined value, a selection process of the power conditioner by second power conditioner selection means as the power conditioner selection means, and the allocation of the second module. Allocation processing of the solar modules by means is performed respectively.

According to the present invention, as in the fifth invention, the first allocation of the solar modules and the selection (first selection) of the power conditioner by the first power conditioner selection means are performed, whereby the comparative It becomes possible to obtain a photovoltaic power generation system with a large power generation capacity.

Further, in the present invention, the difference between the input capacity of the power converter obtained by the first selection of the power conditioner and the power generation capacity of the photovoltaic power generation device obtained by the first allocation of the photovoltaic modules is calculated. be done. This capacity difference corresponds to useless surplus capacity that does not contribute to photovoltaic power generation, and the smaller the capacity difference, the higher the cost-effectiveness of the photovoltaic power generation system. In this case, the cost-effectiveness of the solar power generation system obtained as described above can be confirmed, so if the cost-effectiveness is high, the generation capacity is relatively large and the cost-effectiveness It can provide customers with solar power generation systems.

Further, when the calculated capacity difference exceeds a predetermined value, that is, when the cost-effectiveness of the photovoltaic power generation system obtained as described above is low, the second power conditioner selection means ( The selection of the power conditioner by the power conditioner selection means of claim 1) and the second allocation of the solar modules are performed respectively. As a result, in any case, it is possible to provide customers with a highly cost-effective photovoltaic power generation system.

As described above, according to the present invention, it is possible to obtain the same effect as the fifth invention.

The top view which shows the building in which the photovoltaic power generation system was provided. The figure which shows schematic structure of a design support apparatus. 4 is a functional block diagram showing the flow of design support processing; FIG. The top view which shows the photovoltaic power generation system obtained by design support processing.

An embodiment embodying the present invention will be described below with reference to the drawings. In this embodiment, a design support device that provides design support when installing a photovoltaic power generation system in a building is embodied. Before explaining the design support device, an outline of a photovoltaic power generation system installed in a building will be explained below. FIG. 1 is a plan view showing a building provided with a photovoltaic power generation system.

As shown in FIG. 1, a building 11 is provided with a roof portion 12 . The roof part 12 is a hipped roof, and has a plurality of (specifically, four) roof surfaces 13 divided by ridges (specifically, large ridges and corner ridges). Of these roof surfaces 13, three roof surfaces 13a, excluding the roof surface 13 on the north side, which receives less sunlight, are installation surfaces for installing the solar modules 23 thereon.

The building 11 is provided with a photovoltaic power generation system 20 . The photovoltaic power generation system 20 includes a photovoltaic power generation device 21 that generates power by being irradiated with sunlight, and a power conversion device 22 that converts the DC power generated by the photovoltaic power generation device 21 into AC power. .

The photovoltaic power generation device 21 includes a plurality of photovoltaic modules 23 . The solar module 23 is a module (packaged) obtained by arranging a predetermined number of solar battery elements (solar battery cells), and is also called a solar panel. There are a plurality of types of solar modules 23 with different sizes and shapes, and in the example of FIG. 1, square or triangular solar modules 23 are used. A plurality of solar modules 23 are arranged side by side on each roof surface 13 a of the roof section 12 . Specifically, the photovoltaic power generation device 21 includes a plurality of arrays 24 (three in this embodiment) in which a plurality of photovoltaic modules 23 are combined with each other. 13a, respectively.

The power converter 22 is configured with one or more power conditioners 26 . The power conditioner 26 converts the DC power generated by the solar power generation device 21 into AC power. In the example of FIG. 1, the power conversion device 22 is configured with two power conditioners 26 and installed adjacent to the building 11 outdoors. The power conversion device 22 is connected to the photovoltaic power generation device 21 via a power line 28 . Specifically, the power conversion device 22 is connected to each array 24 of the photovoltaic power generation devices 21 via power lines 28 . Electric power (DC power) generated by the photovoltaic power generation device 21 is supplied to the power conversion device 22 via a power line 28, and the supplied DC power is converted into AC power in the power conversion device 22 (specifically, the power conditioner 26). is converted to The AC power is supplied from the power converter 22 to a distribution board (not shown) in the building 11 , and then supplied from the distribution board to various electric devices in the building 11 .

Next, an overview of the design support device 30 will be described with reference to FIG. FIG. 2 is a diagram showing a schematic configuration of the design support device 30. As shown in FIG.

As shown in FIG. 2, the design support device 30 is composed of a personal computer and has a CAD program for designing buildings. The design support device 30 is installed, for example, in a building manufacturer and used by the designer of the same manufacturer. The design support device 30 includes a control section 31 , an operation section 32 , a display section 33 and a storage section 34 .

The control unit 31 performs design support processing for design support when installing a photovoltaic power generation system in a building. The operation unit 32 performs various operations necessary for the design support processing, and includes a keyboard, a mouse, and the like. The display unit 33 displays various information such as the result of design support processing, and is composed of a display. In addition, the storage unit 34 stores various information necessary for the design support processing.

Next, the flow of design support processing executed by the design support device 30 will be described with reference to FIG. FIG. 3 is a functional block diagram showing the flow of design support processing. In the design support device 30, each functional block 41, 42, 45, 47, 48, 51 to 55 in FIG. . Further, here, it is assumed that the design support when introducing the photovoltaic power generation system 20 into the building 11 described above is performed by design support processing, and the design data (CAD data) of the building 11 is stored in advance in the storage unit. 34.

In the following, the details of the design support processing will be described with reference to FIG. 4 in addition to FIG. 3 as appropriate. FIG. 4 is a plan view showing the photovoltaic power generation system 20 obtained (designed) by the design support process. FIG. 4 also shows information about the power generation capacity and cost of the photovoltaic power generation system 20 .

As shown in FIG. 3 , the roof surface information acquisition unit 41 acquires information on each roof surface 13a (corresponding to the installation surface) on which the solar module 23 is installed in the roof section 12 of the building 11 . The roof surface information acquisition unit 41 acquires information on each roof surface 13a based on the design data (for example, roof plan data) of the roof unit 12 stored in the storage unit 34 . The acquired information on the roof surface 13a includes information on the size (width) and shape of the roof surface 13a. Note that the roof surface information acquisition unit 41 corresponds to installation surface information acquisition means.

Based on the information of each roof surface 13a acquired by the roof surface information acquisition unit 41, the first module allocation unit 42 allocates the solar modules 23 constituting the solar power generation device 21 on each roof surface 13a ( placement). When allocating the solar modules 23, a solar module database 43 storing information on a plurality of types of solar modules 23 is used. The solar module database 43 stores a plurality of solar modules 23 having different shapes and sizes (specifically, their outer shape data). For example, the solar module database 43 stores square, triangular, and trapezoidal solar modules 23 as solar modules 23 having different shapes.

The first module assigning unit 42 reads out from the solar module database 43 a plurality of solar modules 23 (the outline drawing data thereof) corresponding to the size and shape of the roof surface 13a, and assigns the read solar modules 23 to each roof surface. 13a, respectively. In this case, the allocation of the solar modules 23 on each roof surface 13a is performed, for example, on roof plan data (CAD data).

In addition, the first module allocation unit 42 allocates the solar modules 23 on the roof surface 13a so that the total module area of the solar modules 23 constituting the solar power generation device 21 is maximized. . In other words, the first module assigning unit 42 assigns the total power generation capacity of each solar module 23 constituting the solar power generation device 21 to the maximum, that is, to maximize the power generation capacity of the solar power generation device 21 . , each solar module 23 is allocated. FIG. 4(a) shows the allocation state of the solar modules 23 allocated in this manner. The first module allocating section 42 corresponds to first module allocating means.

Incidentally, the power generation capacity of the photovoltaic power generation device 21 is the capacity of power that can be generated by the device 21, in other words, the maximum value of power that can be generated by the device 21 (solar module The same is true for the power generation capacity of 23). Also, the power generation capacity of the photovoltaic power generation device 21 is sometimes referred to as the installed capacity (loading capacity) or the installed capacity.

The first power generation capacity calculation unit 44 calculates the power generation capacity P of the solar power generation device 21 configured by the solar modules 23 allocated by the first module allocation unit 42 . As a result, the power generation capacity P of the photovoltaic power generation device 21 having the maximum power generation capacity in the main building 11 is calculated. In the following description, the photovoltaic power generation device 21 configured by such module allocation is also referred to as a photovoltaic power generation device 21A. In the example of FIG. 4A, the power generation capacity of the photovoltaic power generation device 21A is calculated as 6 kw. Note that the first power generation capacity calculation unit 44 corresponds to power generation capacity calculation means.

The first power conditioner selection unit 45 determines that the input possible capacity V, which is the capacity of power that can be input from the photovoltaic power generation device 21 (maximum value of power that can be input) for the power conversion device 22, is determined by the first power generation capacity calculation unit. The power conditioner 26 constituting the power conversion device 22 is selected so that the power generation capacity P of the photovoltaic power generation device 21 (21A) calculated by 44 is greater than or equal to (V≧P). When selecting the power conditioner 26, a power conditioner database 46 storing information on a plurality of types of power conditioners 26 is used. The power conditioner database 46 stores a plurality of power conditioners 26 having different input capacities, which are capacities of electric power that can be input from the photovoltaic power generation device 21 . The first power conditioner selection unit 45 selects a plurality of power conditioners 26 stored in the power conditioner database 46 so that the inputtable capacity V of the power conversion device 22 is greater than or equal to the power generation capacity P of the solar power generation device 21A. One or a plurality of power conditioners 26 constituting the power conversion device 22 are selected from among them. The available input capacity of the power conversion device 22 corresponds to the sum of the available input capacities of one or more power conditioners 26 that make up the power conversion device 22 (the power conditioners 26 that make up the power conversion device 22 In one case, the available input capacity of the power conditioner 26 becomes the available input capacity of the power converter 22.).

Further, in the first power conditioner selection unit 45, the capacity difference (V− The power conditioner 26 constituting the power conversion device 22 is selected so that P) is minimized. Here, when the inputtable capacity V of the power conversion device 22 is set to be equal to or greater than the power generation capacity P of the solar power generation device 21, the capacity of the solar power generation device 21, which is the smaller capacity of the respective capacities V and P, is The power generation capacity P determines the power generation capacity of the photovoltaic power generation system 20 . That is, in this case, the power generation capacity P of the solar power generation device 21 becomes the power generation capacity of the solar power generation system 20 as it is. Therefore, in such a case, the amount of the inputtable capacity V of the power conversion device 22 that exceeds the power generation capacity P of the solar power generation device 21, that is, the portion corresponding to the capacity difference (VP) is It becomes a useless surplus capacity that does not contribute to power generation. If this surplus capacity is large, the cost for the power generation capacity of the photovoltaic power generation system 20 increases, resulting in a system with poor cost effectiveness. Therefore, as described above, the first power conditioner selection unit 45 selects the power conditioner 26 that constitutes the power conversion device 22 so that the capacitance difference (VP) is minimized. there is The first power conditioner selection unit 45 corresponds to first power conditioner selection means.

In the example of FIG. 4A, the first power conditioner selection unit 45 selects two power conditioners 26 with the same specifications (that is, the same input capacity). Therefore, in the example of FIG. 4( a ), the power converter 22 is composed of two power conditioners 26 . These power conditioners 26 have an input capacity of 5.5 kw. Therefore, in the example of FIG. 4A, the input possible capacity V of the power conversion device 22 is 5.5 kw × 2 = 11 kw, and the input possible capacity V of the power conversion device 22 and the solar power generation device 21 (21 A ) and the power generation capacity P (6 kw) is 11 kw - 6 kw, so that the capacity difference (VP) is 5 kw. In this case, although the first power conditioner selection unit 45 selects the power conditioner 26 so that the capacitance difference (VP) is the smallest, the capacitance difference (VP) is relatively small. In other words, the surplus capacity of the power conversion device 22 is relatively large. This is probably because the inputtable capacity V of the power converter 22 is determined by the combination and number of the power conditioners 26, and fine adjustment is difficult.

Incidentally, a plurality of power conditioners 26 with different input capacities stored in the power conditioner database 46 have different costs (expenses). It's becoming Therefore, in the first power conditioner selection unit 45, the power conversion device 22 is configured so that the capacitance difference (VP) is minimized, that is, the input capacity V of the power conversion device 22 is minimized. Ultimately, selecting the power conditioner 26 that does so also means selecting the power conditioner 26 so that the cost of the power conversion device 22 is the lowest.

As described above, according to the processing by the functional blocks 41, 42, 44, and 45 described above, the photovoltaic power generation system 20 (hereinafter also referred to as the photovoltaic power generation system 20A) having the maximum power generation capacity in the main building 11 is obtained. (See FIG. 4(a)).

The first cost calculation unit 47 calculates the cost of the solar power generation device 21A configured by the solar modules 23 allocated by the first module allocation unit 42 and the power conditioner selected by the first power conditioner selection unit 45. 26 (hereinafter also referred to as power converter 22A). Then, the first cost calculator 47 adds the calculated cost of the photovoltaic power generation device 21A and the calculated cost of the power conversion device 22A to calculate the total cost of the photovoltaic power generation system 20A. The first cost calculator 47 corresponds to the first cost calculator.

The first cost calculation unit 47 calculates the cost of the photovoltaic power generation device 21A based on the unit price per kw (per unit power generation capacity) of the photovoltaic module 23 constituting the device 21A. In the example of FIG. 4A, the unit price per kw of the solar module 23 is 200,000 yen. In addition, the power generation capacity P of the solar power generation device 21A, that is, the power generation capacity P of the solar power generation device 21A configured by each solar module 23 is 6 kw as described above. Therefore, the cost of the photovoltaic power generation device 21A is calculated as 1,200,000 yen from 6 kW×200,000 yen.

Further, the first cost calculator 47 calculates the cost of the power conversion device 22A based on the cost of the power conditioner 26 that constitutes the device 22A. Cost information of the power conditioner 26 is stored in the power conditioner database 46 . Therefore, based on the stored cost information of the power conditioner 26, the cost of the power converter 22A is calculated. In the example of FIG. 4A, the price (cost) per unit of the power conditioner 26 selected by the first power conditioner selection unit 45 is 200,000 yen. Therefore, the cost of the power converter 22A is calculated as 400,000 yen by multiplying 2 units by 200,000 yen. Therefore, in the example of FIG. 4A, the cost of the solar power generation system 20A is calculated as 1.2 million yen (the cost of the solar power generation device 21A) + 400,000 yen (the cost of the power conversion device 22A) to be 1.6 million yen. be.

In the first cost calculation unit 47, further, based on the calculated cost of the solar power generation system 20A and the power generation capacity of the solar power generation system 20A, per unit power generation capacity (per 1 kw) of the solar power generation system 20A Calculate costs. In this case, the cost per unit power generation capacity of the photovoltaic power generation system 20A is calculated by dividing the cost of the photovoltaic power generation system 20A by the power generation capacity of the photovoltaic power generation system 20A. As described above, the power generation capacity of the photovoltaic power generation system 20A corresponds to the power generation capacity P of the photovoltaic power generation device 21A calculated by the first power generation capacity calculation unit 44. In this case, the cost of the photovoltaic power generation system 20A is is divided by the power generation capacity P of the photovoltaic power generation device 21A calculated above, the cost per unit power generation capacity of the photovoltaic power generation system 20A is calculated. In the example of FIG. 4A, the cost of the photovoltaic power generation system 20A is 1.6 million yen, and the power generation capacity P of the photovoltaic power generation device 21A is 6 kw. Therefore, the cost per unit power generation capacity of the photovoltaic power generation system 20A is calculated as 267,000 yen/kw from 1,600,000 yen/6 kw.

The cost evaluation unit 48 evaluates the cost effectiveness of the photovoltaic power generation system 20A based on the cost per unit power generation capacity of the photovoltaic power generation system 20A calculated by the first cost calculation unit 47 . That is, the cost evaluation unit 48 determines whether or not the cost per unit power generation capacity calculated by the first cost calculation unit 47 exceeds a predetermined reference value. If the cost of the solar power generation system 20A exceeds the standard value, the cost-effectiveness of the solar power generation system 20A is evaluated as poor (low), and if the cost per unit power generation capacity does not exceed the standard value, the cost-effectiveness is Evaluate as good (high).

In the example of FIG. 4A, as described above, the cost per unit power generation capacity of the photovoltaic power generation system 20A is calculated as 267,000 yen/kw. Moreover, said reference value is set to 250,000 yen/kw, for example. Therefore, in the example of FIG. 4A, the cost evaluation unit 48 determines that the cost per unit power generation capacity exceeds the reference value, and as a result, evaluates that the cost effectiveness of the photovoltaic power generation system 20A is poor. be done.

When the cost evaluation unit 48 evaluates that the cost effectiveness of the photovoltaic power generation system 20A is good, the process proceeds to output processing by the output unit 55, which will be described later, and the cost information calculated by the first cost calculation unit 47 is calculated. Output (display) to the display unit 33 . After the output process, the design support process ends.

On the other hand, when the cost evaluation unit 48 evaluates that the cost-effectiveness of the photovoltaic power generation system 20A is poor, a process of newly designing (design support) the photovoltaic power generation system 20 with high cost-effectiveness. I do. Therefore, the processing will be described below. Further, in the following description, description will be made with reference to FIG. 4(b) in addition to FIG.

As shown in FIG. 3 , the second power conditioner selection unit 51 determines that the available input capacity V of the power conversion device 22 is the power generation capacity of the photovoltaic power generation device 21 (21A) calculated by the first power generation capacity calculation unit 44. The power conditioner 26 that constitutes the power conversion device 22 is selected so as to be smaller than P (V<P).

Like the first power conditioner selection unit 45 , the second power conditioner selection unit 51 uses the power conditioner database 46 when selecting the power conditioner 26 . That is, the second power conditioner selection unit 51 selects the power so that the available input capacity V of the power conversion device 22 is smaller than the power generation capacity P of the solar power generation device 21A calculated by the first power generation capacity calculation unit 44. One or a plurality of power conditioners 26 constituting the power conversion device 22 are selected from among the plurality of power conditioners 26 stored in the conditioner database 46 . Specifically, in the second power conditioner selection unit 51, the difference ( PV) is selected so that the power conditioner 26 constituting the power converter 22 is selected. The second power conditioner selection unit 51 corresponds to power conditioner selection means and second power conditioner selection means.

In the example of FIG. 4B, only one power conditioner 26 is selected by the second power conditioner selection unit 51 . Specifically, in the example of FIG. 4(b), the two power conditioners 26 of the same specification selected by the first power conditioner selection unit 45 (see FIG. 4(a)) are reduced by one. The remaining one power conditioner 26 is selected. Thus, in the example of FIG. 4B, the power conversion device 22 is composed of one power conditioner 26 . Therefore, the input capacity V of the power conversion device 22 is 5.5 kw, which is 5.5 kw×1 unit.

The second module allocation unit 52 selects the power converter 22 (hereinafter, also referred to as the power converter 22B The solar modules 23 constituting the solar power generation device 21 are allocated on the roof surface 13a so that the input capacity V is less than or equal to (P≦V). Specifically, the second module allocation unit 52 removes a part of each solar module 23 (see FIG. 4(a)) allocated on the roof surface 13a by the first module allocation unit 42. The above allocation is performed on the roof surface 13a. The second module allocating section 52 corresponds to second module allocating means.

Further, in the second module allocation unit 52, the capacity difference (VP) between the available input capacity V of the power conversion device 22B and the power generation capacity P of the solar power generation device 21 is minimized (as much as possible) or The solar modules 23 constituting the solar power generation device 21 are allocated on the roof surface 13a so as to eliminate the capacity difference (VP). Here, when allocating the solar modules 23, by adjusting the number and size of the solar modules 23 to be allocated, the power generation capacity P of the solar power generation device 21 configured by the solar modules 23 can be relatively increased. It can be finely adjusted. Therefore, the second module allocating unit 52 can allocate the solar modules 23 so that the capacity difference (VP) is reduced or eliminated. . Therefore, in this case, the surplus capacity of the power conversion device 22B can be reduced or eliminated, and the photovoltaic power generation system 20 with high cost effectiveness can be obtained.

In the example of FIG. 4B, the second module allocation unit 52 selects two solar modules 23 (specifically, triangular solar modules 23) among the solar modules 23 allocated by the first module allocation unit 42. ) is removed, the above allocation is performed. As a result, in the example of FIG. 4(b), the power generation capacity P of the photovoltaic power generation device 21 is reduced from 6 kw (see FIG. 4(a)) to 5.5 kw. Therefore, in the example of FIG. 4B, the power generation capacity P (5.5 kw) of the photovoltaic power generation device 21 is the same as the input possible capacity V (5.5 kw) of the power conversion device 22B, so that each capacity There is no capacitance difference (VP) between V and P.

The second power generation capacity calculation unit 53 calculates the power generation capacity P of the photovoltaic power generation device 21 (hereinafter also referred to as the photovoltaic power generation device 21B) configured by the solar modules 23 allocated by the second module allocation unit 52. do. Here, as described above, the second module assigning unit 52 sets the power generation capacity P of the solar power generation device 21 to be less than or equal to the input capacity V of the power conversion device 22B. The optical modules 23 are allocated on the roof surface 13a. For this reason, the photovoltaic power generation system 20 (hereinafter referred to as the This will determine the power generation capacity of the photovoltaic power generation system 20B). That is, in this case, the power generation capacity P of the photovoltaic power generation device 21B is directly the power generation capacity of the photovoltaic power generation system 20B. Therefore, the second power generation capacity calculator 53 also calculates the power generation capacity of the photovoltaic power generation system 20B by calculating the power generation capacity P of the photovoltaic power generation device 21B.

In the example of FIG. 4B, the power generation capacity P of the photovoltaic power generation device 21B, that is, the power generation capacity of the photovoltaic power generation system 20B is calculated as 5.5 kw. Therefore, the power generation capacity of the photovoltaic power generation system 20B is slightly smaller than the power generation capacity (6 kw) of the above-described photovoltaic power generation system 20A. It should be noted that the second generation capacity calculation unit 53 corresponds to system capacity calculation means.

The second cost calculation unit 54 calculates the cost of the solar power generation device 21B configured by the solar modules 23 allocated by the second module allocation unit 52 and the power conditioner selected by the second power conditioner selection unit 51. 26 are calculated respectively. Then, the second cost calculation unit 54 adds the calculated cost of the photovoltaic power generation device 21B and the calculated cost of the power conversion device 22B to calculate the cost of the entire photovoltaic power generation system 20B. The second cost calculator 54 corresponds to system cost calculator.

Like the first cost calculation unit 47, the second cost calculation unit 54 calculates the cost of the photovoltaic power generation device 21B based on the unit price per kw of the solar module 23 constituting the device 21B. In the example of FIG. 4(b), the unit price per kw of the solar module 23 is 200,000 yen (this point is the same as in the example of FIG. 4(a)), and the power generation capacity of the solar power generation device 21B is is 5.5 kw. Therefore, the cost of the photovoltaic power generation device 21B is calculated as 1,100,000 yen by calculating 5.5 kw×200,000 yen.

Further, in the second cost calculation section 54, similarly to the first cost calculation section 47, the cost of the power conversion device 22B is calculated based on the cost of the power conditioner 26 constituting the device 22B. That is, based on the cost information of the power conditioner 26 stored in the power conditioner database 46, the cost of the power converter 22B is calculated. In the example of FIG. 4(b), the price (cost) per unit of the power conditioner 26 selected by the second power conditioner selection unit 51 is 200,000 yen (this point is shown in FIG. 4(a) ) example). Therefore, the cost of the power conversion device 22B is calculated as 200,000 yen by multiplying 1 unit by 200,000 yen. Therefore, in the example of FIG. 4B, the cost of the photovoltaic power generation system 20B is calculated as 1.3 million yen by adding 1.1 million yen (the cost of the photovoltaic power generation device 21B) + 200,000 yen (the cost of the power conversion device 22B). be.

The second cost calculation unit 54 further calculates the cost of the solar power generation system 20B based on the calculated cost of the solar power generation system 20B and the power generation capacity of the solar power generation system 20B calculated by the second power generation capacity calculation unit 53. Calculate the cost per unit power generation capacity (per 1 kW). In this case, the cost per unit power generation capacity of the photovoltaic power generation system 20B is calculated by dividing the cost of the photovoltaic power generation system 20B by the power generation capacity of the photovoltaic power generation system 20B. In the example of FIG.4(b), the cost of the solar power generation system 20B is 1,300,000 yen, and the power generation capacity of the solar power generation system 20B is 5.5 kw. Therefore, the cost per unit power generation capacity of the photovoltaic power generation system 20B is calculated as 236,000 yen/kw from 1,300,000 yen/5.5 kw. Therefore, in the photovoltaic power generation system 20B, the cost per unit power generation capacity is lower than the cost per unit power generation capacity (267,000 yen/kw) of the photovoltaic power generation system 20A described above. It is lower than the reference value in the cost evaluation unit 48 that is calculated. Therefore, the photovoltaic power generation system 20B is more cost-effective than the photovoltaic power generation system 20A described above.

The output unit 55 calculates the cost of the photovoltaic power generation system 20A and the cost per unit power generation capacity calculated by the first cost calculation unit 47, and the cost and unit of the photovoltaic power generation system 20B calculated by the second cost calculation unit 54. and the cost per power generation capacity are output to the display unit 33 respectively. Thereby, the display unit 33 displays the cost information of each of the photovoltaic power generation systems 20A and 20B.

In addition to the cost information, the output unit 55 outputs information (allocation information) about the solar modules 23 allocated by the first module allocation unit 42 and the first power conditioner selection unit 45 for the solar power generation system 20A. Information on the power conditioner 26 selected by is output to the display unit 33 . Similarly, for the photovoltaic power generation system 20B, in addition to the cost information, information (allocation information) of the solar modules 23 allocated by the second module allocation unit 52, and the second power conditioner selection unit Information on the power conditioner 26 selected by 51 is output to the display unit 33 . Therefore, the display unit 33 displays information on the solar module 23 and information on the power conditioner 26 in addition to the above cost information for each of the solar power generation systems 20A and 20B. As a result, it is possible to propose the photovoltaic power generation system 20A with the maximum power generation capacity and the photovoltaic power generation system 20B with high cost effectiveness to the customer.

Note that the output unit 55 may output the cost information and the like of each of the photovoltaic power generation systems 20A and 20B to a printer or the like instead of or in addition to outputting the information to the display unit 33 .

According to the configuration of the present embodiment described in detail above, the following excellent effects are obtained.

Based on the acquired information on the roof surface 13a of the building 11, the first module allocation unit 42 allocates the solar modules 23 constituting the solar power generation device 21 on the roof surface 13a. Further, the first power generation capacity calculation unit 44 calculates the power generation capacity of the photovoltaic power generation device 21 ( 21 A) configured by the solar modules 23 allocated by the first module allocation unit 42 .

In addition, the second power conditioner selection unit 51 selects the power conversion device 22 so that the available input capacity of the power conversion device 22 is smaller than the power generation capacity of the solar power generation device 21 (21A) calculated by the first power generation capacity calculation unit 44. A power conditioner 26 that constitutes the power converter 22 is selected. Then, in the second module allocation unit 52, the power generation capacity of the photovoltaic power generation device 21 is determined as the input available capacity of the power conversion device 22 (22B) configured by the power conditioner 26 selected by the second power conditioner selection unit 51. The solar modules 23 constituting the solar power generation device 21 are allocated on the roof surface 13a as follows.

Here, the power generation capacity of the photovoltaic power generation device 21 can be adjusted relatively finely according to the number and size of the photovoltaic modules 23 to be allocated. Therefore, when allocating the solar modules 23 so that the power generation capacity of the solar power generation device 21 is equal to or less than the input capacity of the power conversion device 22, the input capacity of the power conversion device 22 and the power conversion device 21 It is possible to perform the allocation so that the difference in capacity from the power generation capacity is as small as possible or there is no such difference in capacity. As a result, it is possible to minimize the useless surplus capacity in the power conversion device 22 (22B) or eliminate the surplus capacity, so that the photovoltaic power generation system 20 (20B) with high cost effectiveness can be realized. It becomes possible to propose to customers.

The first module allocation unit 42 allocates the solar modules 23 on the roof surface 13a so that the power generation capacity of the solar power generation device 21 is maximized. In this case, based on the photovoltaic power generation device 21 (21A) obtained by such module allocation, the second power conditioner selection unit 51 selects the power conditioner 26, and the second module allocation unit 52 selects the solar module 23 allocation is performed. As a result, it is possible to propose to customers the photovoltaic power generation system 20 (20B) that has a large power generation capacity and is highly cost-effective.

The second power generation capacity calculation unit 53 calculates the power generation capacity of the photovoltaic power generation system 20B, and the second cost calculation unit 54 calculates the cost of the photovoltaic power generation system 20B. It is possible to show the cost-effectiveness of Specifically, the second cost calculation unit 54 calculates the cost per unit power generation capacity of the photovoltaic power generation system 20B based on the calculated power generation capacity and cost of the photovoltaic power generation system 20B. It is possible to present the cost-effectiveness of the power generation system 20B to the customer in an easy-to-understand manner.

Further, the first cost calculation unit 47 calculates the cost per unit power generation capacity of the solar power generation system 20A having the maximum power generation capacity, and the output unit 55 calculates the calculated unit power generation of the solar power generation system 20A. Both the cost per capacity and the calculated cost per unit power generation capacity of the photovoltaic power generation system 20B are output to the display unit 33 . As a result, it is possible to present the cost-effectiveness of each of the photovoltaic power generation systems 20A and 20B to the customer while comparing them.

The second module allocating unit 52 removes a part of each solar module 23 allocated on the roof surface 13a by the first module allocating unit 42, thereby allocating the solar modules 23 on the roof surface 13a. is done. As a result, module allocation by the second module allocation section 52 can be performed relatively easily.

In the configuration of the above embodiment in which the first allocation by the first module allocation unit 42 and the second allocation by the second module allocation unit 52 are performed as the allocation of the solar modules 23 on the roof surface 13a, the first allocation The power generation capacity of the photovoltaic power generation device 21B obtained by the second allocation is smaller than the power generation capacity of the photovoltaic power generation device 21A obtained. In other words, the power generation capacity of the photovoltaic power generation device 21A obtained by the first allocation is larger than the power generation capacity of the photovoltaic power generation device 21B obtained by the second allocation.

Therefore, in the above embodiment, after the power generation capacity of the photovoltaic power generation device 21A obtained by the first allocation is calculated, the first power conditioner selection unit 45 selects the input possible capacity of the power conversion device 22 (22A). is greater than or equal to the calculated power generation capacity of the photovoltaic power generation device 21A. In this case, all of the power generated by the photovoltaic power generation device 21A is converted by the power conversion device 22A, making it possible to obtain the photovoltaic power generation system 20A with a relatively large power generation capacity.

Then, for the photovoltaic power generation system 20A thus obtained, the cost per unit power generation capacity is calculated in the first cost calculator 47 . In this case, since the cost effectiveness of the solar power generation system 20A can be confirmed, if the cost effectiveness is high, the solar power generation system 20A with relatively large power generation capacity and high cost effectiveness can be sent to the customer. can provide.

Further, when the cost per unit power generation capacity of the photovoltaic power generation system 20A exceeds the reference value, that is, when the cost effectiveness of the photovoltaic power generation system 20A is low, the second power conditioner selection unit 51 The selection of the power conditioner 26 by the second module allocation unit 52 and the allocation of the solar modules 23 by the second module allocation unit 52 are performed respectively. As a result, in any case, it is possible to provide the customer with a highly cost-effective photovoltaic power generation system 20 (20B).

The present invention is not limited to the above embodiments, and may be implemented as follows, for example.

In the above-described embodiment, the solar modules 23 are allocated in the first module allocation unit 42 so that the power generation capacity of the solar power generation device 21 is maximized. No assignment need be made. For example, the photovoltaic modules 23 may be allocated so that the power generation capacity of the photovoltaic power generation device 21 is equal to or greater than a predetermined target value.

- When selecting the power conditioner 26 constituting the power conversion device 22 in the first power conditioner selection unit 45, the number of circuits of the power conditioner 26, the conversion efficiency, and the like may be considered. Similarly, the second power conditioner selection unit 51 may also select power conditioners 26 in consideration of the number of circuits, conversion efficiency, and the like.

In the above embodiment, the second power conditioner selection unit 51 selects the power conditioners 26 by reducing the number of power conditioners 26 selected by the first power conditioner selection unit 45. The second power conditioner selection unit 51 does not necessarily have to perform selection in this manner. For example, the power conditioner 26 having a smaller input capacity than the power conditioner 26 selected by the first power conditioner selection unit 45 (in other words, the power conditioner 26 selected by the first power conditioner selection unit 45 The selection may be made by extracting the smaller power conditioner 26 ) from among the power conditioners 26 stored in the power conditioner database 46 . In this case also, the second power conditioner selection unit 51 sets the inputtable capacity of the power conversion device 22 to be smaller than the power generation capacity of the solar power generation device 21 calculated by the first power generation capacity calculation unit 44. , the power conditioner 26 can be selected.

The input capacity V of the power conversion device 22A configured by the power conditioner 26 selected by the first power conditioner selection unit 45 and the power generation of the photovoltaic power generation device 21A calculated by the first power generation capacity calculation unit 44 A capacitance difference (VP) from the capacitance P may be calculated (corresponding to capacitance difference calculation means). This capacity difference (VP) corresponds to useless surplus capacity that does not contribute to photovoltaic power generation, and the smaller the capacity difference, the higher the cost effectiveness of the photovoltaic power generation system 20A. In this case, the cost-effectiveness of the photovoltaic power generation system 20A can be confirmed, so if the cost-effectiveness is high, the customer is provided with the photovoltaic power generation system 20A that has a large power generation capacity and is highly cost-effective. be able to.

In addition, in the configuration in which the capacity difference (VP) is calculated in this way, if the calculated capacity difference (VP) exceeds a predetermined value, that is, the cost of the solar power generation system 20A When the effect is low, the selection of the power conditioner 26 by the second power conditioner selection unit 51 and the allocation of the solar modules 23 by the second module allocation unit 52 may be performed. In this case, in any case, it is possible to provide the customer with a highly cost-effective photovoltaic power generation system 20 (20B).

- In the above embodiment, the process of selecting the power conditioner 26 by the first power conditioner selection unit 45 may not be performed. In this case, the selection process of the power conditioner 26 is only the process by the second power conditioner selection section 51 . Even in such a case, it is possible to obtain a highly cost-effective photovoltaic power generation system 20 by performing module allocation by the second module allocation unit 52 after the selection process.

In the above embodiment, the solar modules on the roof surface 13a are removed by the second module allocation unit 52 by removing a part of each solar module 23 allocated on the roof surface 13a by the first module allocation unit 42. 23 assignments were made. That is, in the above-described embodiment, the second module allocation unit 52 performs allocation using the solar modules 23 allocated by the first module allocation unit 42. However, the second module allocation unit 52 does not necessarily It is not necessary to allocate the solar modules 23, and the solar modules 23 may be allocated on the roof surface 13a from scratch. In this case, as in the allocation of the solar modules 23 by the first module allocation unit 42, the solar module database 43 may be used for allocation.

In the above embodiment, the installation surface of the solar module 23 in the building 11 is the roof surface 13a, and the information of the roof surface 13a is acquired by the roof surface information acquisition unit 41 (corresponding to installation surface information acquisition means). However, the installation surface of the solar module 23 is not limited to the roof surface, and may be set to the outer wall surface of the building. In that case, the information of the outer wall surface may be obtained by the installation surface information obtaining means.

DESCRIPTION OF SYMBOLS 11... Building, 12... Roof part, 13a... Roof surface as an installation surface, 20... Solar power generation system, 21... Solar power generation device, 22... Power conversion device, 23... Solar module, 26... Power conditioner, 30... Design support device, 31... Control unit, 34... Storage unit, 41... Roof surface information acquisition unit as installation surface information acquisition means, 42... First module allocation unit as first module allocation means, 44... Power generation capacity First power generation capacity calculation unit as calculation means 45 First power conditioner selection unit as first power conditioner selection means 47 First cost calculation unit as first cost calculation means 51 Power conditioner Second power conditioner selection unit as selection means and second power conditioner selection means, 52 second module allocation unit as second module allocation means, 53 second generation capacity calculation unit as system capacity calculation means, 54 . . . a second cost calculation unit as system cost calculation means;

Claims (6)

A photovoltaic power generation device configured with a plurality of photovoltaic modules to generate photovoltaic power, and one or more power conditioners configured to convert power generated by the photovoltaic power generation device from direct current to alternating current A design support device for a photovoltaic power generation system that provides design support when introducing a photovoltaic power generation system including a power conversion device for conversion into a building,
installation surface information acquisition means for acquiring information on an installation surface on which the solar module is installed in the building;
a first module allocating means for allocating the solar modules constituting the solar power generation device on the installation surface based on the installation surface information acquired by the installation surface information acquisition means;
a power generation capacity calculation means for calculating a power generation capacity of the solar power generation device configured by the solar modules allocated by the first module allocation means;
The power conversion device is operated such that an inputtable capacity, which is a power capacity that can be input from the solar power generation device, of the power conversion device is smaller than the power generation capacity of the solar power generation device calculated by the power generation capacity calculation means. power conditioner selection means for selecting the power conditioner to constitute;
The solar power generation device that configures the solar power generation device such that the power generation capacity of the solar power generation device is equal to or less than the inputtable capacity of the power conversion device that is configured by the power conditioner selected by the power conditioner selection means. a second module allocating means for allocating solar modules on the installation surface;
A design support device for a photovoltaic power generation system, comprising: The first module allocating means allocates the photovoltaic modules constituting the photovoltaic power generation device on the installation surface so that the power generation capacity of the photovoltaic power generation device is maximized. Item 1. A device for supporting design of a photovoltaic power generation system according to Item 1. system capacity calculation means for calculating the power generation capacity of the solar power generation device configured by the solar modules allocated by the second module allocation means as the power generation capacity of the solar power generation system;
Cost of the power conversion device configured by the power conditioner selected by the power conditioner selection means, and cost of the solar power generation device configured by the solar modules allocated by the second module allocation means and a system cost calculation means for calculating the sum of the calculated costs as the cost of the photovoltaic power generation system;
The design support device for a photovoltaic power generation system according to claim 1 or 2, characterized by comprising: The second module allocation means allocates the solar modules on the installation surface by removing a part of the solar modules allocated on the installation surface by the first module allocation means. 4. The design support device for a photovoltaic power generation system according to any one of claims 1 to 3. A first power that selects the power conditioner constituting the power conversion device such that the inputtable capacity of the power conversion device is equal to or greater than the power generation capacity of the solar power generation device calculated by the power generation capacity calculation means a conditioner selection means;
The cost of the photovoltaic power generation device configured by the photovoltaic modules allocated by the first module allocation means, and the power conversion configured by the power conditioner selected by the first power conditioner selection means a first cost calculation means for calculating the cost of the device, and calculating the sum of the calculated costs as the cost of the photovoltaic power generation system;
The power generation capacity of the solar power generation system for which the cost is calculated by the first cost calculation means corresponds to the power generation capacity of the solar power generation device calculated by the power generation capacity calculation means,
The first cost calculation means calculates a cost per unit power generation capacity of the photovoltaic power generation system based on the calculated cost of the photovoltaic power generation system and the power generation capacity of the photovoltaic power generation system;
When the cost per unit power generation capacity calculated by the first cost calculation means exceeds the reference value, the power conditioner selection process by the second power conditioner selection means as the power conditioner selection means 5. The design support device for a photovoltaic power generation system according to claim 1, wherein the photovoltaic module assigning process by the second module assigning means is performed. A first power that selects the power conditioner constituting the power conversion device such that the inputtable capacity of the power conversion device is equal to or greater than the power generation capacity of the solar power generation device calculated by the power generation capacity calculation means a conditioner selection means;
between the available input capacity of the power conversion device configured by the power conditioner selected by the first power conditioner selection means and the power generation capacity of the solar power generation device calculated by the power generation capacity calculation means; and a capacity difference calculation means for calculating the capacity difference,
When the capacity difference calculated by the capacity difference calculation means exceeds a predetermined value, the power conditioner selection process by a second power conditioner selection means as the power conditioner selection means; 5. The design support device for a photovoltaic power generation system according to claim 1, wherein the photovoltaic modules are assigned by a 2-module assigning means.

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