JP4666538B1 - Power generation system design apparatus, power generation system design method, and program - Google Patents

Abstract

A power generation system design apparatus for use in designing a power generation system is provided.
A tree having a root node of a connection point, a leaf node of a power generation device, a parent-child relationship of an intermediate node of an intermediate from the connection point to the power generation device, and attribute information on generation or reduction of power of each node A tree structure information storage unit 11 in which structure information is stored, a child node generation instruction information including attribute information of a child node to be generated, and an intermediate node generation instruction information including attribute information of an intermediate node to be generated 12. Add attribute information included in the received child node generation instruction information and child nodes corresponding to the attribute information to the tree structure information, and correspond to attribute information and attribute information included in the received intermediate node generation instruction information A change unit 13 for adding the intermediate node to the tree structure information and an output unit 16 for outputting the tree structure indicated by the tree structure information so as to be visually recognizable are provided.
[Selection] Figure 1

Description

  The present invention relates to a power generation system design apparatus for designing a power generation system represented by a tree structure.

Conventionally, when designing a power generation system that collects power generated by a natural energy power generation device, a template for the power generation system is prepared in advance, and parameters relating to power generation are changed in the template. It was broken. Moreover, all the power generation systems that do not fall under such a template have been designed manually.
In addition, the development of a design evaluation support system related to power generation such as solar cells has been performed (see, for example, Patent Document 1).

JP 2010-161913

  However, when a template is used as in the conventional power generation system design, it is necessary to design all power generation systems that do not apply to the template by hand, and the burden on the worker is very large. There was a problem to say. Moreover, by increasing the amount of templates, the rate of manual design can be reduced, but it is still impossible to completely eliminate manual design. This is because there is a range that cannot be covered by the template.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a power generation system design apparatus and the like that can arbitrarily design a power generation system.

  In order to achieve the above object, a power generation system design apparatus according to the present invention exists in a route node corresponding to a connection point, a leaf node corresponding to a natural energy power generation device, and a path from the connection point to the power generation device. Information on a tree structure indicating a parent-child relationship with an intermediate node corresponding to an intermediate that is an object, and information having attribute information indicating an attribute relating to generation or reduction of power corresponding to each node is stored. Tree structure information storage unit, instruction information for generating a new child node for an existing node in the tree structure, child node generation instruction information which is information including attribute information of the child node, and parent and child in the tree structure Intermediate node generation instruction information that is information on an instruction to generate a new intermediate node between two existing nodes that are in a relationship, and that includes attribute information of the intermediate node And when the reception unit receives the child node generation instruction information, the attribute information included in the child node generation instruction information and the child node corresponding to the attribute information are added to the tree structure information. When node generation instruction information is received, the attribute information included in the intermediate node generation instruction information and the change unit that adds the intermediate node corresponding to the attribute information to the tree structure information and the tree structure indicated by the tree structure information are visually displayed. And an output unit for outputting so that it can be recognized.

  With such a configuration, it is possible to design an arbitrary power generation system represented by a tree structure. Therefore, for example, even a small-scale system such as a household power generation system or a large-scale system such as a power generation system that generates power as a business can be designed.

In the power generation system design apparatus according to the present invention, the intermediate may include one or more selected from the group of a cable, a connection box, a DC / AC converter, a transformer, and a boosting unit.
With such a configuration, for example, a power generation system including a cable, a connection box, a DC / AC converter, a transformer, and the like can be designed.

In the power generation system designing apparatus according to the present invention, the intermediate node may include a dummy intermediate node that is an intermediate node for which no corresponding intermediate exists.
With such a configuration, a dummy intermediate node can be set. For example, a tree structure can be divided into an arbitrary partial tree structure where there is no intermediate node corresponding to the intermediate. For example, power generation can be evaluated in the partial tree structure.

In the power generation system design device according to the present invention, the tree structure includes leaf nodes corresponding to electric devices that consume power, and the tree structure information includes attribute information regarding power consumption corresponding to the leaf nodes. May be.
With such a configuration, it becomes possible to set a leaf node that consumes power, and a more detailed design is possible.

Further, in the power generation system design apparatus according to the present invention, the tree structure information includes the same parent tree as a parent when a plurality of the same partial tree structures having the same parent node as a parent exist in the tree structure in parallel. It has tree structure information indicating a sub-tree structure and number information indicating the number of the same sub-tree structure. The receiving unit also receives the number information, and the changing unit receives the number information received by the receiving unit. It may be added to the tree structure information.
With such a configuration, when there are a plurality of the same partial tree structures in parallel with the same parent node as the parent, they can be shown together, and the tree structure information can be simplified.

In the power generation system designing apparatus according to the present invention, the output unit may output each node of the tree structure and at least a part of the attribute information corresponding to each node.
With such a configuration, at least part of the attribute information is output.

In the power generation system design apparatus according to the present invention, the reception unit also receives an instruction for specifying a node in the tree structure output by the output unit, and the output unit corresponds to the node specified by the instruction received by the reception unit. Attribute information may also be output.
With such a configuration, attribute information corresponding to the designated node is output.

Further, in the power generation system design device according to the present invention, the tree structure includes an intermediate node corresponding to the intermediate that is the cable and an intermediate node corresponding to the intermediate that is the DC / AC converter, and the changing unit includes: The attribute information corresponding to the cable on the leaf side than the intermediate node corresponding to the DC / AC converter is determined according to the DC cable, and the attribute information corresponding to the cable on the route side than the intermediate node corresponding to the DC / AC converter is set. It is good also as a thing according to AC cable.
With this configuration, the cable attribute information can be automatically set.

In the power generation system designing apparatus according to the present invention, the tree structure includes an intermediate node corresponding to the intermediate that is the cable and an intermediate node corresponding to the intermediate that is the DC / AC converter. The attribute information corresponding to the cable on the leaf side of the intermediate node corresponding to the DC / AC converter corresponds to the mismatch in the cable corresponding to the AC cable and the cable on the route side than the intermediate node corresponding to the DC / AC converter. It may further include a consistency detection unit that detects a mismatch whose corresponding attribute information corresponds to the DC cable, and the output unit may also output the mismatch detected by the consistency detection unit.
With such a configuration, it becomes possible to automatically detect inconsistencies regarding the attribute information of the cable. As a result, the mismatch can be resolved with respect to the cable in which the mismatch is detected.

In addition, the power generation system design apparatus according to the present invention supports the root node by calculating the amount of generated power and the reduction in the amount of power from the leaf node to the root node using the attribute information included in the tree structure information. The simulation part which acquires the electric energy in the connection point to perform may further be provided, and an output part may also output the electric energy in the connection point which the simulation part acquired.
With such a configuration, it becomes possible to know the amount of power at the interconnection point by the designed power generation system.

In the power generation system design apparatus according to the present invention, the power generation device may be a solar cell.
With such a configuration, it is possible to design a solar cell power generation system.

  According to the power generation system design apparatus and the like according to the present invention, it is possible to design an arbitrary power generation system indicated by a tree structure.

The block diagram which shows the structure of the electric power generation system design apparatus by Embodiment 1 of this invention. The flowchart which shows operation | movement of the electric power generation system design apparatus by the embodiment The flowchart which shows operation | movement of the electric power generation system design apparatus by the embodiment The figure which shows an example of the display in the embodiment The figure which shows an example of the display in the embodiment The figure which shows an example of the display in the embodiment The figure which shows an example of the tree structure information in the embodiment The figure which shows an example of the attribute information in the embodiment The figure which shows an example of the display in the embodiment The figure which shows an example of the display in the embodiment The figure which shows an example of the tree structure information in the embodiment The figure which shows an example of the display in the embodiment The figure which shows an example of the tree structure information in the embodiment The figure which shows an example of the display in the embodiment The figure which shows an example of the solar radiation ratio for every month in the embodiment The figure which shows an example of the solar altitude etc. for every time in the embodiment The figure which shows an example of the voltage and electric power calculated in the embodiment The figure which shows an example of the voltage and electric power calculated in the embodiment Schematic diagram showing an example of the appearance of the computer system in the embodiment The figure which shows an example of a structure of the computer system in the embodiment

  Hereinafter, a power generation system designing apparatus according to the present invention will be described using embodiments. In the following embodiments, components and steps denoted by the same reference numerals are the same or equivalent, and repetitive description may be omitted.

(Embodiment 1)
A power generation system design apparatus according to Embodiment 1 of the present invention will be described with reference to the drawings. The power generation system design apparatus according to the present embodiment designs a power generation system represented by a tree structure.

  FIG. 1 is a block diagram showing a configuration of a power generation system design apparatus 1 according to the present embodiment. The power generation system design apparatus 1 according to the present embodiment includes a tree structure information storage unit 11, a reception unit 12, a change unit 13, a consistency detection unit 14, a simulation unit 15, and an output unit 16.

  The tree structure information storage unit 11 stores tree structure information. The tree structure information includes a root node corresponding to a connection point, a leaf node corresponding to a power generator of natural energy, an intermediate node corresponding to an intermediate existing in a path from the connection point to the power generation device, and Is a tree structure information indicating the parent-child relationship. The interconnection point is a point where a power generation system to be designed is connected to a commercial power system. Therefore, the most upstream side in the power generation system is a connection point. The natural energy power generation device is a power generation device using natural energy such as sunlight, wind power, hydropower, tidal power, wave power, etc., and may be a solar cell, for example, wind power generation or hydropower generation. It may be a generator such as tidal power generation or wave power generation. In this embodiment, the case where the power generation device is a solar cell will be mainly described. In addition, the intermediate may include one or more selected from the group of a cable, a connection box, a DC / AC converter, a transformer, and a boosting unit. That is, an intermediate node corresponding to one or more members selected from the group of cables, junction boxes, DC / AC converters, transformers, and boosting units may exist in the tree structure. Therefore, the intermediate node may be, for example, one corresponding to a cable or one corresponding to a connection box, and may be a DC / AC converter (hereinafter also referred to as “orthogonal converter”). It may be compatible, may be compatible with a transformer, or may be compatible with a boost unit. The orthogonal transformer may be called a power conditioner or a PCS (power conditioning subsystem). There may also be intermediate nodes corresponding to other intermediates. Further, a dummy intermediate node that is an intermediate node having no corresponding intermediate may exist in the intermediate node. The intermediate node may be used, for example, as a location for calculating the electric energy in the simulation unit 15. The tree structure may include leaf nodes corresponding to electric devices that consume power. The electric device that consumes electric power may be, for example, an air-conditioning electric device (air conditioner) for cooling an orthogonal transformer, a transformer, or the like, may be a lighting device, or may be a monitoring device, Electric equipment used in other power generation systems may be used. The root node is a node having no parent node. A leaf node is a node having no child node. An intermediate node is a node in which one parent node and one or more child nodes exist. The information indicating the tree structure includes, for example, information for identifying a parent node of each node (for example, a node ID of the parent node, a pointer indicating a position where the parent node information is stored, etc.). It may be information that has, for each node, information that identifies the child node of that node (for example, a node ID of the child node, a pointer that indicates the position where the child node information is stored, etc.) Alternatively, it may be information having information for specifying a parent node and a child node of each node. The information indicating the tree structure may be other information as long as the information can indicate the parent-child relationship of each node.

  Further, the tree structure information has attribute information indicating attributes relating to generation or reduction of power corresponding to each node. The attribute information related to the generation of power may be, for example, information indicating a voltage, a current, or the like during 100% power generation or during power generation under standard test conditions (STC: Standard Test Conditions). Further, the attribute information related to power reduction may be, for example, information indicating efficiency, information used to calculate power consumption at the node, information used to calculate resistance, and the like. There may be a node that does not correspond to the attribute information. For example, the corresponding attribute information does not have to exist in the root node corresponding to the interconnection point or the dummy intermediate node. Also, the corresponding attribute information may not exist in the intermediate node corresponding to the connection box. Further, in the case where a leaf node corresponding to an electrical device that consumes power is included in the tree structure, attribute information regarding power consumption corresponding to the leaf node may be included in the tree structure information.

Here, the attribute information for each node type will be briefly described.
The attribute information of the solar cell is information used to calculate the amount of power generated by the solar cell. For example, the voltage, current, and normal direction of the solar cell during 100% power generation or power generation under standard test conditions Azimuth angle, solar cell tilt angle, and the like.
The attribute information of the cable is information used to calculate the reduction in power in the cable, and may be, for example, the resistance of the cable, or information used to calculate the resistance of the cable (for example, a long length). , Cross-sectional area, number, material, etc.).
The attribute information of the quadrature transformer is information used to calculate the decrease in power in the quadrature transformer, and includes, for example, a DC voltage, an AC voltage, and an AC wiring system (for example, single-phase two-wire or three-way Phase 3 wire, etc.), conversion efficiency. The voltage may have a width. Further, the conversion efficiency may be set for each width of the input DC voltage.
The attribute information of the transformer is information used for calculating a reduction in power in the transformer, and may be, for example, a rated capacity, a no-load loss, a load loss, or a transformation ratio. In the present embodiment, it is assumed that the transformation ratio of the transformer is the transformation ratio when the leaf side is the primary voltage and the root side is the secondary voltage. That is, the voltage on the root side multiplied by the transformation ratio becomes the voltage on the leaf side. This is the same whether power is supplied from the leaf side to the root side or when power is supplied from the root side to the leaf side. Moreover, the voltage on the route side may be included in the attribute information of the transformer. This is because the voltage on the root side may be selected by tap switching.
The attribute information of an electric device that consumes power is information used to calculate the amount of power consumed by the electric device. For example, even if it is voltage, current (or power consumption), operation rate, etc. Good. The operating rate is the average rate at which the electrical equipment is operating. For example, if the operation rate is 50%, 50% of the electric energy is consumed in a certain period (for example, one month, one day, one hour, etc.).
In addition, at least a part of the information described above may not be included in the attribute information of the tree structure information, and information other than the information described above may be included in the attribute information of the tree structure information. . For example, in a cable, an orthogonal transformer, or a transformer, an upper limit value of an input voltage or current may be included in the attribute information.

  Also, the tree structure information includes a tree structure indicating one subtree structure having a parent node as a parent when a plurality of the same subtree structures having the same parent node as a parent exist in the tree structure in parallel. Information and number information indicating the number of the same subtree structure may be included. In this way, it is not necessary to repeatedly set the same sub-tree structure in the tree structure, the design is easy at the time of designing, and the grasping is easy when viewing the designed power generation system. Become.

  In the present embodiment, a case where the tree structure information includes node information corresponding to each node will be described. Each node information has attribute information and number information corresponding to the node. Each node information has information indicating a parent-child relationship of a tree structure. As described above, the information indicating the parent-child relationship may be, for example, information for specifying the parent node, information for specifying the child node, or the parent node and the child node. It may be information for specifying both. In the present embodiment, a case will be described in which node information includes information for specifying a parent node of a corresponding node. Further, the attribute information included in the tree structure information may be managed as a separate file or not.

  The tree structure information stored in the tree structure information storage unit 11 is accumulated by the changing unit 13. The storage in the tree structure information storage unit 11 may be temporary storage in a RAM or the like, or may be long-term storage. The tree structure information storage unit 11 can be realized by a predetermined recording medium (for example, a semiconductor memory, a magnetic disk, an optical disk, etc.).

  The reception unit 12 receives child node generation instruction information and intermediate node generation instruction information. The child node generation instruction information is information on an instruction to generate a new child node for an existing node in the tree structure. The child node generation instruction information is information including attribute information of a child node to be generated. Also, it is assumed that the parent node for the child node to be generated can be specified by the child node generation instruction information. The intermediate node generation instruction information is information on an instruction to generate a new intermediate node between two existing nodes having a parent-child relationship in a tree structure. The intermediate node generation instruction information is information including attribute information of the intermediate node to be generated. In addition, it is assumed that at least a child node for the intermediate node to be generated can be specified by the intermediate node generation instruction information. Since there is one parent node corresponding to a certain node, if the child node can be specified, the parent node corresponding to the generation target intermediate node can also be specified. As a result, the generation target intermediate node This is because the parent node and the child node can be specified. Further, when the above-described number information is included in the tree structure information, the receiving unit 12 may also receive the number information. The number information may or may not be included in the child node generation instruction information and the intermediate node generation instruction information.

  Moreover, the reception part 12 may receive information other than those. For example, the reception unit 12 may receive an instruction to delete an existing node in the tree structure. Further, the receiving unit 12 may receive an instruction to update an existing node in the tree structure. The update may be, for example, an update of attribute information, an update of number information, an update of a parent-child relationship of a tree structure, or another update.

  The reception unit 12 may receive information input from an input device (for example, a keyboard, a mouse, a touch panel, etc.), or receives information transmitted via a wired or wireless communication line. May be. The reception unit 12 may or may not include a device (for example, a modem or a network card) for reception. In addition, the reception unit 12 may be realized by hardware, or may be realized by software such as a driver that drives a predetermined device.

  When the receiving unit 12 receives the child node generation instruction information, the changing unit 13 adds the attribute information included in the child node generation instruction information and the child node corresponding to the attribute information to the tree structure information. That is, the changing unit 13 changes the tree structure information so that the child node instructed to generate by the child node generation instruction information is added to the tree structure, and adds the attribute information to the tree structure information. In the present embodiment, the changing unit 13 generates new node information according to the received child node generation instruction information, and the attribute information included in the received child node generation instruction information is included in the node information. to add. The changing unit 13 sets the parent-child relationship so that the parent node of the node corresponding to the generated node information becomes the parent node specified by the child node generation instruction information. When the number information is also received, the changing unit 13 adds the received number information to the generated node information.

  Further, when the receiving unit 12 receives the intermediate node generation instruction information, the changing unit 13 adds the attribute information included in the intermediate node generation instruction information and the intermediate node corresponding to the attribute information to the tree structure information. That is, the changing unit 13 changes the tree structure information so that an intermediate node whose generation is instructed by the intermediate node generation instruction information is added to the tree structure, and adds the attribute information to the storage image information. In the present embodiment, the changing unit 13 generates new node information according to the received intermediate node generation instruction information, and the attribute information included in the received intermediate node generation instruction information is included in the node information. to add. Also, the changing unit 13 sets the parent-child relationship so that the parent node of the node corresponding to the generated node information becomes the parent node specified by the intermediate node generation instruction information. The changing unit 13 updates the parent-child relationship so that the child node of the node corresponding to the generated node information becomes a child node specified by the intermediate node generation instruction information. When the number information is also received, the changing unit 13 adds the received number information to the generated node information.

  In addition, when the receiving unit 12 receives an instruction to delete an existing node, the changing unit 13 receives the tree structure information so that the node to be deleted is deleted from the tree structure according to the instruction. Update. In addition, when the tree structure information includes attribute information corresponding to the node to be deleted, the attribute information may be deleted. In the present embodiment, the changing unit 13 deletes the node information corresponding to the node to be deleted in response to the received instruction to delete the existing node. In addition, the changing unit 13 updates the parent-child relationship so that the child node of the node to be deleted becomes a child node of the parent node of the node to be deleted.

  In addition, when the receiving unit 12 receives an instruction to update an existing node, the changing unit 13 updates the tree structure information according to the instruction. In the present embodiment, for example, when new attribute information of a node to be updated is received, the changing unit 13 updates the attribute information of the node information corresponding to the node to be updated to new attribute information. May be. When information for specifying a new parent node of the node to be updated is received, the changing unit 13 accordingly specifies a parent node included in the node information corresponding to the node to be updated. The information may be updated.

  The consistency detection unit 14 detects a mismatch in the tree structure information in which the attribute information corresponding to the cable on the leaf side of the intermediate node corresponding to the DC / AC converter corresponds to the AC cable. In the case of a DC cable, since the number of cables is two, the consistency detector 14 detects a mismatch if the number of cables on the leaf side of the intermediate node corresponding to the DC / AC converter is not two. May be. For example, when the attribute information corresponding to the cable on the leaf side of the intermediate node corresponding to the DC / AC converter indicates that the number of cables is three, the consistency detection unit 14 detects the mismatch. May be.

  In addition, the consistency detection unit 14 detects a mismatch in the tree structure information in which the attribute information corresponding to the cable on the route side of the intermediate node corresponding to the DC / AC converter corresponds to the DC cable. If the AC wiring system of the DC / AC converter is “N line” (N is an integer of 2 or more), the number of cables in the AC cable on the root side of the DC / AC converter is N. Therefore, the consistency detection unit 14 may detect a mismatch if the number of cables on the route side from the intermediate node corresponding to the DC / AC converter is not N. For example, when the DC / AC converter converts DC into 3-line or 4-line AC, the attribute information corresponding to the cable on the route side of the intermediate node corresponding to the DC / AC converter indicates the cable When it is indicated that the number is two, the consistency detection unit 14 may detect inconsistency.

  When these mismatches are detected, the tree structure includes an intermediate node corresponding to the intermediate that is the cable and an intermediate node corresponding to the intermediate that is the DC / AC converter. become.

  The simulation unit 15 uses the attribute information included in the tree structure information to calculate the amount of generated power and the decrease in the amount of power from the leaf node to the root node, thereby generating power at the interconnection point corresponding to the root node. Get the quantity. If the tree structure includes a leaf node corresponding to an electric device that consumes power, the simulation unit 15 performs a calculation in consideration of the power consumption. In addition, when the tree structure information includes the number information, the simulation unit 15 calculates the power at the parent node of the partial structure tree when calculating the power amount at the parent node of the partial structure tree indicated by the number information. The amount of power obtained by multiplying the amount by the number indicated by the number information is used. For each leaf node, the simulation unit 15 calculates a voltage and a current according to the power generated or consumed at that leaf node. In addition, the simulation unit 15 inputs, for each intermediate node, the sum of all the power from one or more child nodes of the intermediate node, and considers the decrease in power in the intermediate node, thereby determining the intermediate node The power on the route side of When the power on the leaf side of the intermediate node is positive (that is, when power generation is performed on the leaf side), the simulation unit 15 subtracts the power decreasing at the intermediate node from the positive power on the leaf side. Thus, the power passed to the parent node can be calculated. Specifically, when the efficiency of the intermediate node is 90% and the power on the leaf side of the intermediate node is A (W), the simulation unit 15 sets 0 as the power on the root side of the intermediate node. .9 * A (W) can be calculated. When the power on the leaf side of the intermediate node is negative (that is, when power is consumed on the leaf side), the simulation unit 15 reduces the power on the intermediate node from the negative power on the leaf side. By adding, the power on the route side can be calculated. Specifically, when the efficiency of the intermediate node is 90% and the power on the leaf side of the intermediate node is A (W), the simulation unit 15 uses A as the power on the root side of the intermediate node as A /0.9 (W) can be calculated. This is because A (W) is necessary on the leaf side of the intermediate node, and A / 0.9 (W) needs to be received from the root side. In the case of consumption, the power may be expressed as minus. By performing such calculations sequentially from the leaf node to the root node, it is possible to know the amount of power at the interconnection point that is the root node, and to know the amount of power generated by the designed invention system. become. Note that the simulation unit 15 may calculate the power (W) as long as the power amount (Wh) can be calculated finally. Further, since the power (W) is a product of the voltage (V) and the current (A), the simulation unit 15 may calculate the voltage and the current. This is because, as will be described later, depending on the type of the intermediate node, it is necessary to perform calculation using voltage or current. Therefore, the simulation unit 15 may calculate the power amount of each node by calculating the voltage and current of each node at each time zone and time. When performing calculation using voltage and current, for example, when a calculation target node receives power from a plurality of child nodes, the sum of currents for the plurality of child nodes and a plurality of child nodes are calculated. Is used as the current and voltage on the leaf side of the node to be calculated (usually the voltage is the same for all of the plurality of child nodes). In addition, the calculation may be performed for each time zone, or may be performed for each period. For example, the time zone may be one hour or an integer time of 2 or more. The time may be, for example, one day, one week, one month, one year, or another time. Moreover, the simulation part 15 may acquire the electric energy in each node finally, or may acquire only the electric energy in a connection point.

  Here, a calculation method for each type of node will be specifically described. Each of a solar cell corresponding to a leaf node, a cable corresponding to an intermediate node, an orthogonal transformer, a transformer, a connection box, and an electric device that consumes power corresponding to a leaf node will be described. Regarding the leaf node, a method for calculating the voltage and the like on the root side will be described. For the intermediate node, a method for calculating the voltage on the root side using the voltage on the leaf side will be described. For the root node, the power of the root node can be calculated by summing the power on the root side of the child nodes of the root node. Further, in this simulation, it is assumed that calculation is performed from the leaf side toward the root side regardless of whether power is consumed or generated.

[Solar cell]
For solar cells, the attribute information corresponding to the solar cell (strictly speaking, attribute information corresponding to the leaf node corresponding to the solar cell) includes the current and voltage during power generation under standard test conditions, that is, the nominal output current. And the nominal output voltage. In addition, in a recording medium (not shown), it is assumed that the solar radiation ratio corresponding to the ratio of sunlight reaching the ground is stored at regular intervals. For example, if it is cloudy or rainy, the amount of solar radiation reaching the solar cell will be lower than in sunny weather. Therefore, using the past meteorological information (for example, meteorological information for the past 20 years), the insolation amount in the past with respect to the insolation amount of the standard test conditions at regular intervals (for example, every week, every month, etc.) It is assumed that the solar radiation ratio that is the ratio of the above is calculated, and information indicating the ratio (ratio) is stored in advance. Moreover, the simulation part 15 shall acquire the solar altitude (angle which makes a horizontal 0 degree | times and a zenith 90 degree | times) according to a date, and the azimuth | direction angle of a sun. Solar altitude and azimuth can be acquired according to latitude and longitude. Note that the solar altitude and azimuth corresponding to the altitude may be acquired together with the latitude and longitude. This acquisition may be, for example, acquisition by calculating the solar altitude or the like, or acquisition using information (for example, see FIG. 16) that associates the date and time with the altitude and azimuth angle of the sun. Also good. Further, the attribute information corresponding to the solar cell may include an azimuth angle in the normal direction of the solar cell and an inclination angle of the solar cell (an inclination angle with respect to the horizontal, where the horizontal is 0 degree). And the simulation part 15 calculates the cosine (cos (theta)) of angle (theta) which a solar ray and the normal line of a solar cell make about a certain time slot | zone, for example. And the electric current which a solar cell produces | generates is computable by multiplying the calculated cosine cos (theta), the solar radiation ratio of the time which wants to calculate the electric power generation amount of a solar cell, and the electric current at the time of the electric power generation of standard test conditions. In addition, since the voltage of a solar cell hardly changes according to electric power generation amount, the voltage at the time of the electric power generation of standard test conditions will be used as an electric power generated voltage. That is, the voltage and current on the root side of the solar cell are as follows.
Root side voltage = nominal output voltage (V)
Route side current = cos θ × (insolation ratio (%) / 100) × nominal output current (A)
The amount of power determined by the calculated current and the voltage at the time of power generation under the standard test conditions is the amount of power generated by the solar cell. Originally, the power generation amount of the solar cell is indicated by electric power, but in the calculation at the upper node, current and voltage values may be required. The voltage or the calculated current may be stored in a recording medium (not shown). The calculation method described here is a simple calculation method that approximates that all the solar radiation corresponds to direct sunlight. A calculation method when the solar radiation is divided into direct solar radiation and scattered solar radiation will be described later.

[cable]
For a cable, it is assumed that the resistance (Ω) of the cable can be acquired by using attribute information corresponding to the cable. Therefore, the simulation unit 15 acquires the resistance of the cable. And the voltage drop by a cable is computable by following Formula using the acquired resistance. The simulation unit 15 can calculate the voltage on the cable root side by subtracting the calculated voltage drop from the voltage on the leaf side of the cable. Note that the current on the route side of the cable is the same as the current on the leaf side of the cable. When there are a plurality of child nodes on the leaf side of the cable, the current on the leaf side of the cable is the sum of the currents on the root side of the plurality of child nodes.

Voltage drop (V) = K x resistance (Ω) x current (A)
Here, K is a coefficient corresponding to the wiring system (electric system) and is as follows.
Wiring method K value DC 2-wire system 2
AC single-phase two-wire system 2
AC single-phase three-wire system 1
AC three-phase three-wire system 3 ^1/2
AC three-phase four-wire system 1

  Therefore, when the voltage on the leaf side of the cable is D (V) and the total current on the leaf side is E (A), if the resistance of the cable is R (Ω), the voltage on the route side of the cable Is D−K × R × E (V), and the current on the root side is E (A).

  In addition, about a wiring system, it becomes a direct current | flow 2-line system between a solar cell and an orthogonal converter, and the root node side becomes an alternating current wiring system produced | generated by the orthogonal converter rather than the orthogonal converter. Further, when there is no orthogonal transformer or AC / DC converter in the upper node of the electric device that consumes power, the wiring method of the upper node is the same as that of the root node. On the other hand, when an orthogonal converter or an AC / DC converter is present at a higher node of the electrical device, the same applies to the case of the solar cell. That is, between the electrical equipment and the orthogonal transformer or AC / DC converter, the leaf side wiring system is used, and the root node side of the orthogonal converter or AC / DC converter is the root side wiring system.

  In addition, if there is an electrical device that consumes power on the leaf side of the cable, current flows from the cable root side to the cable leaf side, so the amount of power consumed is lower on the upper side of the cable. Higher than the side. Specifically, when the voltage on the leaf side of the cable is D (V) and the total current on the leaf side is E (A), the cable route is assumed to be R (Ω). The voltage on the side is D + K × R × E (V), and the current on the root side is E (A).

[Orthogonal transformer]
For an orthogonal transformer, the input voltage, output voltage, and efficiency of the orthogonal transformer can be known by referring to attribute information corresponding to the orthogonal transformer. Accordingly, by using them, the voltage and current on the root side corresponding to the voltage and current on the leaf side can be calculated. In the present embodiment, the case where the leaf side of the orthogonal transformer is a direct current and the root side is an alternating current will be described. For example, the input DC voltage of the orthogonal transformer is 200 to 600 (V), the output AC voltage is B (V), the efficiency is C (%), and the DC voltage on the leaf side of the orthogonal transformer is D (V ), When the current is E (A), the voltage on the root side is B (V), and the current on the root side is D × E × (C / 100) / B (A). Here, D is assumed to be in the range of 200 to 600.

  Although the orthogonal transformer has been described here, the calculation is performed in the same manner when there is an electrical device that operates on a direct current on the leaf side and the AC / DC converter is used on the upper side of the electrical device. It can be carried out. For example, when the AC voltage on the root side of the AC / DC converter is B (V), the efficiency is C (%), the DC voltage on the leaf side is D (V), and the current is E (A) The voltage on the root side is B (V), and the current is D × E × (100 / C) / B (A).

[Connection box]
In the present embodiment, it is assumed that no power reduction occurs in the junction box. Therefore, the sum of the output powers of the child nodes of the connection box is passed to the parent node of the connection box. In the case of calculation using voltage and current, as described above, the sum of all currents on the leaf side of the junction box becomes the current on the root side, and the voltage on the leaf side of the junction box (usually the multiple child nodes) The voltage is the same for all), but it becomes the voltage on the root side as it is. Note that the calculation related to the dummy intermediate node can be performed in the same manner as the connection box.

[Transformer]
For the transformer, the loss (W) in the transformer can be calculated by the following equation using the attribute information corresponding to the transformer.
Loss (W) = No-load loss (W) + (Input ratio) ² x Load loss (W)
Here, “input ratio = input power / rated capacity of transformer”. The no-load loss is consumed even when the transformer does not perform transformation. Therefore, when the power of all nodes lower than the transformer is 0, the transformer behaves in the same manner as an electric device that consumes power corresponding to the no-load loss.

Further, when calculating the output voltage and output current from the transformer, an approximation is made that the loss affects the output current. Then, for example, AC of D (V) and E (A) is input from the leaf side of the transformer, the transformation ratio is N, the no-load loss is F (W), and the load loss is G (W) If the rated capacity is H (VA), the loss (W) is F + (D × E / H) ² × G. Further, since the voltage (V) on the route side is D / N, the current (A) on the route side is N × E−N × {F + (D × E / H) ² × G} / D. .

When power is consumed on the leaf side of the transformer, the calculation is performed as follows. For example, D (V) and E (A) alternating current is consumed on the leaf side of the transformer, the transformation ratio is N, no-load loss is F (W), and load loss is G (W). Assume that the capacity is H (VA). In addition, since power is actually supplied from the root side to the leaf side, the input ratio on the root side of the transformer must be used. Here, the input ratio on the root side and the input on the leaf side must be used. The calculation is performed by approximating that the ratio (strictly speaking, the output ratio) is equal. Then, the loss (W) is F + (D × E / H) ² × G. Further, since the voltage (V) on the route side is D / N, the current (A) on the route side is N × E + N × {F + (D × E / H) ² × G} / D.

[Electric appliances that consume power]
For electrical devices that consume power, the attribute information corresponding to the electrical device includes the voltage (V), power consumption (W), and operation rate (%) of the electrical device. Therefore, the simulation part 15 can know the voltage (V) and electric current (A) consumed by the electric equipment by using them. The current (A) is L × (M / 100) / J, where J (V) is the voltage of the electrical device, L (W) is the power consumption, and M (%) is the operation rate. .

  Note that the calculation at the upper node of the electric device that consumes power is performed so that the power on the lower side of the node can be secured even if the reduction in power at the node to be calculated is taken into consideration. The power of is calculated. For example, if the efficiency of a node to be calculated is 90% and P (W) is consumed on the lower side of the node, P / 0.9 (W) is required on the upper side of the node. become.

  Further, the power may be attenuated depending on the shape of each node, connection terminals, and other characteristics. Therefore, when performing the calculation for each node, the voltage, current, and power on the root side of each node may be calculated by multiplying by a coefficient corresponding to the characteristics related to the attenuation of power. The calculation at each node is not limited to the above method, and other calculations may be performed. For example, in the transformer, the case where the loss affects only the current has been described, but the calculation may be performed so that the loss affects both the current and the voltage.

  For each node, formulas for calculating the voltage and current on the root side are stored in a recording medium (not shown), and the simulation unit 15 may read and use it. At that time, two expressions, that is, when the power on the leaf side is positive (when generated) and when it is negative (when consumed) may be stored.

  As a whole of the tree structure, the simulation unit 15 acquires the amount of electric power as follows. First, the simulation unit 15 calculates the amount of power generated at the leaf node and the amount of power consumed at the leaf node. The simulation unit 15 specifies the type of leaf node (for example, a solar cell or an electric device that consumes power) from which the amount of power is acquired, and reads an expression corresponding to the type. Then, the simulation unit 15 calculates the voltage and current on the root side according to the read expression. In addition, in the calculation regarding a solar cell, the simulation part 15 shall perform the calculation which also used the solar radiation ratio etc. as mentioned above. In the calculation, the coefficient of the read expression may be acquired using attribute information corresponding to the leaf node.

  Next, the simulation unit 15 acquires the power amount for an intermediate node in which the power amounts of all the child nodes have already been acquired. Specifically, the simulation unit 15 specifies the type of intermediate node (for example, a cable, a transformer, an orthogonal transformer, a connection box, a dummy intermediate node, etc.) from which power is acquired by using the tree structure information. To do. The simulation unit 15 determines whether the power on the leaf side of the intermediate node is positive or negative. Then, the simulation unit 15 reads, from a recording medium (not shown), equations for calculating the root-side voltage and current of the intermediate node according to the type of the intermediate node and the sign of the power on the leaf side. Note that the simulation unit 15 uses the attribute information corresponding to the intermediate node to acquire the coefficient of the read expression. As described above, the attribute information can be considered to include the parameters in the formula used for calculating the node type and the power amount on the root side of the node. Finally, the simulation unit 15 calculates the voltage and current on the root side of the intermediate node by using an expression into which the voltage, power, coefficient, and the like on the leaf side are substituted. The calculated voltage and current may be stored in a recording medium (not shown) until output by the output unit 16 is performed. At that time, it may be stored in association with information for identifying the node. Moreover, the simulation part 15 can calculate the electric energy of a root node by repeatedly calculating this intermediate node to a root node.

  When the number information corresponding to the leaf node or the intermediate node is other than “1”, the simulation unit 15 multiplies the calculated power amount by the value indicated by the number information for the leaf node or the intermediate node. The amount of power is calculated as the amount of power on the root side of the leaf node or intermediate node. When the electric energy is indicated by voltage and current, the simulation unit 15 calculates the current on the root side by multiplying the calculated current by the value indicated by the number information.

  When the intermediate node is a transformer and the power on the leaf side of the intermediate node is 0, as described above, the simulation unit 15 determines that the intermediate node has no load loss ( The power (= no load loss) on the route side may be acquired assuming that the electric device consumes only the power W) (having an operation rate of 100%). When dividing the power into voltage and current, the simulation unit 15 is, for example, a node on the lower side of the transformer, and the nearest node that can determine the voltage (for example, an orthogonal converter or a solar cell). ) Is the voltage on the leaf side of the intermediate node corresponding to the transformer, the power on the root side is equal to the voltage on the root side (= voltage on the leaf side / transformation ratio) and the current on the root side ( = Route side power / route side voltage).

  The output unit 16 outputs so that the tree structure indicated by the tree structure information can be visually recognized. That is, the output by the output unit 16 may be a display on a display device (for example, a CRT or a liquid crystal display), may be a transmission for display on a transmission destination device, It may be an accumulation or a delivery to another component for display. Moreover, in those outputs, the display may be replaced with printing. In the present embodiment, the case where the output unit 16 performs display on a display device will be described. Note that a method of generating a tree structure figure indicated by the tree structure information from the tree structure information is already known, and the description thereof is omitted. Further, in the tree structure output by the output unit 16, it is preferable that each node included in the tree structure can be identified. For example, the node name may be included in each node of the tree structure.

  Further, when the consistency detection unit 14 detects a mismatch, the output unit 16 may output the mismatch detected by the consistency detection unit 14. In addition, when the simulation unit 15 acquires the power amount or the like at the connection point, the output unit 16 may output the power amount or the like at the connection point acquired by the simulation unit 15.

  The output unit 16 may or may not include an output device (for example, a display device or a printer). The output unit 16 may be realized by hardware, or may be realized by software such as a driver that drives these devices.

Next, operation | movement of the electric power generation system design apparatus 1 by this Embodiment is demonstrated using the flowchart of FIG.
(Step S101) The receiving unit 12 determines whether or not child node generation instruction information has been received. If child node generation instruction information is received, the process proceeds to step S102, and if not, the process proceeds to step S104.

  (Step S102) The changing unit 13 changes the tree structure information stored in the tree structure information storage unit 11 so that a child node to be generated is added according to the received child node generation instruction information.

  (Step S103) The output unit 16 outputs the tree structure information after the change. Then, the process returns to step S101.

  (Step S104) The receiving unit 12 determines whether intermediate node generation instruction information has been received. If intermediate node generation instruction information is received, the process proceeds to step S105, and if not, the process proceeds to step S107.

  (Step S105) The changing unit 13 changes the tree structure information stored in the tree structure information storage unit 11 so that an intermediate node to be generated is added according to the received intermediate node generation instruction information.

  (Step S106) The output unit 16 outputs the tree structure information after the change. Then, the process returns to step S101.

  (Step S107) The reception unit 12 determines whether an instruction to delete a node has been received. If an instruction to delete a node is received, the process proceeds to step S108. If not, the process proceeds to step S110.

  (Step S108) The changing unit 13 changes the tree structure information stored in the tree structure information storage unit 11 so that the node to be deleted is deleted in response to the received instruction to delete the node.

  (Step S109) The output unit 16 outputs the changed tree structure information. Then, the process returns to step S101.

  (Step S110) The consistency detection unit 14 determines whether or not to perform detection related to consistency. And when performing the detection regarding consistency, it progresses to step S111, and when that is not right, it progresses to step S113. For example, the consistency detection unit 14 may determine that the detection related to the consistency is performed after the child node or the intermediate node is added, or the power generation system design apparatus 1 performs the detection related to the consistency. When an instruction to this effect is received, it may be determined that detection regarding consistency is performed. In the present embodiment, the latter case will be described.

  (Step S111) The consistency detection unit 14 performs detection related to consistency.

  (Step S <b> 112) The output unit 16 outputs a result of detection related to consistency by the consistency detection unit 14. Note that the output unit 16 may perform this output only when inconsistency is detected, or may perform output even if inconsistency is not detected. Then, the process returns to step S101.

  (Step S113) The simulation unit 15 determines whether to perform a simulation. If the simulation is performed, the process proceeds to step S114. If not, the process returns to step S101. Note that the simulation unit 15 may determine that the simulation is performed when the power generation system design apparatus 1 receives an instruction to perform the simulation, for example.

  (Step S114) The simulation part 15 performs simulation and acquires the electric energy in a connection point. The acquired electric energy may be stored in a recording medium (not shown). Details of this processing will be described later with reference to the flowchart of FIG.

  (Step S115) The output unit 16 outputs a simulation result. The simulation result includes at least the electric energy at the interconnection point. Then, the process returns to step S101.

  In the flowchart of FIG. 2, a process of changing a tree structure information so that a node update instruction may be received in accordance with the received update instruction may be performed. In the flowchart of FIG. 2, the process is ended by power-off or a process end interrupt.

The flowchart of FIG. 3 is a flowchart showing details of the simulation process (step S114) in the flowchart of FIG.
(Step S201) The simulation unit 15 acquires the hierarchical level of each node using the tree structure information stored in the tree structure information storage unit 11. This hierarchical level is based on the root node. Further, the hierarchical level of the child node is a value larger by 1 than the hierarchical level of the parent node of the child node. In the present embodiment, the hierarchical level of the root node is “1”. Note that a method of acquiring the hierarchical level of each node using tree structure information, for example, node information, is already known and will not be described.

  (Step S202) The simulation unit 15 sets the counter M to the maximum value of the hierarchy level acquired in Step S201.

  (Step S <b> 203) The simulation unit 15 calculates generated power, consumed power, reduced power, and the like for all nodes having a hierarchical level of “M”. As described above, this calculation is performed for leaf nodes by calculating generated power and consumed power. In addition, this calculation refers to the tree structure information for the intermediate node, identifies the child node of the intermediate node, and uses the power on the root side of the identified child node to determine the root side of the intermediate node. This is done by calculating the power. Further, this calculation is performed by referring to the tree structure information for the root node, specifying child nodes of the root node, and summing the power on the root side of the specified child node.

  (Step S204) The simulation unit 15 decrements the counter M by 1. By doing so, the node to be calculated is close to the root node by one layer.

  (Step S205) The simulation unit 15 determines whether the counter M is equal to zero. If the value is equal to 0, the calculation up to the root node has been completed, so the process proceeds to step S206. Otherwise, the process returns to step S203.

  (Step S206) The simulation unit 15 determines whether to repeat the processing from step S202. If it is repeated, the process returns to step S202. If not, the process returns to the flowchart of FIG. For example, when acquiring the amount of electric power for one day by accumulating the amount of electric power every hour or acquiring the amount of electric power for one year by accumulating the amount of electric power for every day, The simulation unit 15 may determine that the calculation is repeated until the calculation of the last time or the last day is completed, and may determine that the calculation is not repeated if the calculation of the last time or the last day is completed.

  In the flowchart of FIG. 3, when the processes in steps S202 to S205 are repeated, the process of summing the electric energy in each process may be performed after the determination in step S206 is NO.

  Next, operation | movement of the electric power generation system design apparatus 1 by this Embodiment is demonstrated using a specific example. In this specific example, the output unit 16 displays the tree structure on a display (not shown).

  First, it is assumed that the user inputs an instruction to start the design of the power generation system to the power generation system design apparatus 1 by operating a mouse or the like. Then, the output unit 16 reads the tree structure information stored in the tree structure information storage unit 11 and displays the tree structure. It is assumed that the tree structure information includes only information on the root node corresponding to the interconnection point. Then, the output unit 16 performs the display shown in FIG. In FIG. 4, only the root node “connection point” is displayed. It is assumed that the node ID of the root node “connected point” is “N001”.

  It is assumed that the user clicks and selects the root node “linkage point” by operating the mouse or the like. Then, as shown in FIG. 4, the root node “connected point” is highlighted. Next, it is assumed that the user clicks the “create child node” button. Then, the fact that the “child node generation” button has been clicked is accepted by the accepting unit 12, and that fact is passed to the output unit 16 via a route (not shown). When the output unit 16 receives that the “child node generation” button has been clicked, the output unit 16 displays a screen shown in FIG. 5 that requests input of node information relating to a newly generated child node. Information for generating this screen is stored in a recording medium (not shown), and the output unit 16 may perform the display of FIG. 5 by reading it. In FIG. 5, input of the name of the node displayed on the screen, the number of the nodes, and the type of the nodes is required. In this specific example, it is assumed that a solar cell, a cable, an orthogonal transformer, a connection box, a transformer, an electric device, and a dummy intermediate node can be selected as the node type. Here, as shown in FIG. 5, the user inputs the name “PCS”, selects the number “1” from the pull-down menu, selects the type “orthogonal transformer” from the pull-down menu, and clicks the “OK” button. Suppose you click. Then, the name “PCS”, the number “1”, and the type “orthogonal transformer” are received by the receiving unit 12 and temporarily stored in a recording medium (not shown). Also, the type “orthogonal transformer” is passed to the output unit 16 via a path (not shown).

  Upon receiving the type “orthogonal transformer”, the output unit 16 issues an ID of the “orthogonal transformer” and displays a screen requesting input of an attribute corresponding to the orthogonal transformer of the issued ID. Here, “orthogonal transformer 001” is issued as the ID of the orthogonal transformer, and a screen requesting input of the attribute of the orthogonal transformer identified by the ID is displayed. Information for generating this screen is stored in a recording medium (not shown) for each type of node, and the output unit 16 may display the screen by reading it. In the screen, as shown in FIG. 6, it is assumed that the user inputs a DC voltage range, an AC voltage, an AC wiring method, and an efficiency, and clicks an “OK” button. Then, a DC voltage “250 to 600 (V)”, an AC voltage “200 (V)”, an AC wiring method “three-phase three-wire”, and an efficiency “90 (%)” are received by the receiving unit 12. By this reception, the child node generation instruction information is completely received (step S101). Then, the reception unit 12 receives the name “PCS”, the number “1”, the type “orthogonal transformer”, and the DC voltage “250 to 600 (V)” and the AC voltage “200 ( V) ”, AC wiring method“ three-phase three-wire ”, efficiency“ 90 (%) ”, ID“ orthogonal transformer 001 ”issued by the output unit 16, and node ID“ N001 ”currently highlighted. ”(This node may be referred to as“ node N001 ”. The same applies to other nodes hereinafter) and an instruction to generate a child node is passed to the changing unit 13. Then, the changing unit 13 generates node information corresponding to the child node having the node ID “N001”. The node information is indicated by the second record in FIG. The node ID “N002” is a node ID issued when generating the node information. The name and number information are information input by the user, and the parent node ID is the node ID of the currently highlighted node. The attribute information is an ID of an orthogonal transformer corresponding to the node. Further, the changing unit 13 separately accumulates attribute information corresponding to the ID of the orthogonal transformer in the tree structure information storage unit 11 as shown in FIG. 8A (step S102). In addition, in the attribute information of the orthogonal transformer in FIG. 8A, the ID of the corresponding orthogonal transformer, the lower limit (V) of the DC voltage, the upper limit (V), the AC voltage (V), the wiring method, Efficiency (%) is associated. These voltages and the like are values received by the receiving unit 12.

  Thereafter, the output unit 16 refers to the tree structure information shown in FIG. 7 and displays the tree structure as shown in FIG. 9 (step S102). In the tree structure of FIG. 9, the root node “linkage point” and its child node “PCS” are displayed. In the display of this tree structure, the “name” of each node is displayed so that the parent-child relationship of each node can be understood. A method for displaying a tree structure using information indicating the tree structure is already known, and a description thereof will be omitted.

  Next, it is assumed that the user clicks and highlights the node “PCS” that is a child node of the generation-target intermediate node, and then clicks the “generate intermediate node” button. Then, the fact that the “intermediate node generation” button has been clicked is received by the reception unit 12, the node ID “N002” of the highlighted node N002 is temporarily stored, and the “intermediate node generation button” is displayed. The clicked result is passed to the output unit 16 via a route (not shown). When the output unit 16 receives that the “intermediate node generation” button has been clicked, the output unit 16 displays a screen requesting input of node information relating to the newly generated intermediate node, as in the case of child node generation. It is assumed that the user inputs the name “transformer”, the number “1”, and the type “transformer” in accordance with the display on the screen. Then, they are received by the receiving unit 12 and stored in a recording medium (not shown). Also, an ID “transformer 001” corresponding to the type “transformer” is issued, and a screen requesting input of attribute information corresponding to the ID “transformer 001” is displayed. Assume that the user inputs a rated capacity (kVA), no-load loss (W), load loss (W), and transformation ratio on the screen, and clicks an “OK” button as shown in FIG. Then, the input attribute information is received by the receiving unit 12. By this reception, the intermediate node generation instruction information is completely received (step S104). Then, the reception unit 12 receives the name received so far, the attribute of the transformer received this time, the issued ID, and an instruction to generate a new intermediate node as a parent node of the node N002. The data is passed to the changing unit 13. Then, the changing unit 13 generates the node N003 as a child node of the node N001 that is the parent node of the node N002 at that time, and also changes the node N002 so that the node N002 becomes a child node of the generated node N003. Update the parent node ID. As a result, node information corresponding to the third record in FIG. 11 and transformer attribute information corresponding to the first record in FIG. 8B are stored in the tree structure information storage unit 11 (step S105). ). Thereafter, the output unit 16 refers to the tree structure information shown in FIG. 11 and displays the tree structure as shown in FIG. 12 (step S106).

  Thereafter, when the user repeats the generation of the child node, the tree structure information becomes as shown in FIG. 13, and the attribute information corresponding to the tree structure information becomes as shown in FIG. Suppose that the display according to the tree structure information is as shown in FIG. In FIG. 14, “100 ×” displayed in the connection box indicates that 100 connection boxes are connected to the cable. The “100” corresponds to the number information “100” of the connection boxes in the tree structure information of FIG. Further, according to the tree structure information shown in FIG. 13, the attribute information of each node is stored in the tree structure information storage unit 11 as shown in FIG. 8. As for the cable, as shown in FIG. 8C, attribute information indicating the length, the cross-sectional area, and the number of pieces is stored. For the solar cell, as shown in FIG. 8D, the voltage and current during power generation under the standard test conditions, the azimuth angle in the normal direction of the solar cell panel, and the inclination angle of the solar cell panel The attribute information shown is stored. The maximum current is the current under standard test conditions. For electrical devices that consume power, attribute information indicating voltage, power consumption, and operation rate is stored.

  Next, assume that the user clicks the “Consistency detection” button in the display of FIG. Then, the accepting unit 12 accepts an instruction to detect consistency (step S110), and passes an instruction to detect consistency to the consistency detecting unit 14. Upon receiving the consistency detection instruction, the consistency detection unit 14 refers to the tree structure information and performs a detection process related to consistency (step S111). Specifically, the consistency detection unit 14 first detects node information of the orthogonal transformer by performing a search with the search key “orthogonal transformer” in the attribute information of the tree structure information. In this case, the node information of the node N002 is hit. Next, the consistency detection unit 14 detects the node of the cable existing from the node of the orthogonal transformer to the root node by following the parent node of the node information corresponding to the detected orthogonal transformer. The detection is performed by detecting a node including “cable” in the attribute information, which exists from the node N002 of the orthogonal transformer to the root node (node having no parent node ID). In this case, since the node of the cable does not exist, the consistency detection unit 14 detects the node of the cable existing from the node N002 to the leaf node. The detection is performed by detecting a node including “cable” in the attribute information existing from the node N002 of the orthogonal transformer to a leaf node (a node having no parent node as a parent node). . In this case, the node N004 is detected as a cable node. Then, the consistency detecting unit 14 determines whether or not the attribute information corresponding to the cable on the leaf side from the orthogonal transformer corresponds to the AC cable. In this case, since the number of cables of the attribute information shown in FIG. 8C corresponding to the cable ID “cable 001” is “2”, the consistency detection unit 14 does not detect inconsistency. . As a result, the output unit 16 displays the detection result “no inconsistency” regarding consistency (step S112). In this specific example, a case has been described in which a detection result relating to consistency is output even when no inconsistency is detected, but this need not be the case. If no mismatch is detected, the detection result may not be output, and the detection result may be output only when the mismatch is detected.

  Next, assume that the user clicks the “simulation” button in the display of FIG. Then, the reception unit 12 receives an instruction to perform a simulation (step S113), and passes the instruction to perform a simulation to the simulation unit 15. Then, the simulation unit 15 refers to the tree structure information and performs a simulation (step S114). In this simulation, the simulation unit 15 uses information shown in FIGS. 15 and 16 stored in a recording medium (not shown). FIG. 15 is information indicating the solar radiation ratio for each month, and is calculated according to the rate at which sunlight reaches the position of the solar cell using past weather information. FIG. 16 is information having date and time, sun altitude, and sun azimuth in association with each other in Osaka, Japan. The date and time when there is no solar altitude or azimuth is before sunrise or after sunset, indicating that there is no sunlight irradiated to the solar cell. Further, in this specific example, in the simulation, the electric energy at the connection point is calculated every hour from January 1 to December 31 in 2010, and these are totaled to obtain one year of 2010. A case of calculating the total power amount of will be described.

  First, the simulation unit 15 acquires the hierarchical level of each node of the tree structure indicated by the tree structure information in FIG. 13 (step S201). Specifically, the simulation unit 15 sets the hierarchy level of the root node to “1” and sets the hierarchy level of the child node of the root node to “2”. In addition, the hierarchy level of the child node of the node at the hierarchy level “2” is set to “3”. As described above, the simulation unit 15 repeatedly executes the process of setting the hierarchy level of the child node of the node of the hierarchy level “N” to “N−1” until the hierarchy level of the leaf node is calculated. Moreover, the simulation part 15 calculates a hierarchy level about all the nodes. The simulation unit 15 may store information having a node ID and a hierarchical level of the node identified by the node ID in association with each other in a recording medium (not shown).

  Next, the simulation unit 15 acquires a maximum hierarchy level that is a hierarchy level having the largest value from the hierarchy levels corresponding to all nodes. In the case of the tree structure information of FIG. 13, the maximum hierarchical level is “6”. Therefore, the simulation unit 15 sets the counter M to the maximum hierarchy level “6” (step S202).

  After that, the simulation unit 15 calculates the amount of power related to each node whose hierarchy level is the maximum hierarchy level “6” (step S203). In this specific example, since the node having the hierarchical level “6” is only the node of the solar cell, the simulation unit 15 performs the calculation at 0:00 on January 1, 2010 for the node of the solar cell. In this case, since the sun does not come out, the voltage and current of the solar cell are zero. Therefore, even if it is multiplied by the number “5” indicated by the number information, the voltage and current become 0, and the simulation unit 15 is the node at 0 o'clock on January 1, 2010 as shown in the first record in FIG. A voltage “0” and a current “0” corresponding to N006 are stored in a recording medium (not shown).

  Next, the simulation unit 15 updates the counter to “5” (steps S204 and S205), and calculates the amount of power for each node having a hierarchical level of “5” (step S203). In this specific example, since the node whose hierarchy level is “5” is only the node of the connection box, the simulation unit 15 performs the calculation for the node. Specifically, since the connection box only collects the power input from the leaf side and outputs it to the root side, the voltage “0” and the power “0” of the child node N006 are set to 1 in FIG. Get from the second record. Then, the voltage and current obtained by multiplying them by the number “100” indicated by the number information are stored as shown in the second record of FIG.

  Next, the simulation unit 15 updates the counter to “4” (steps S204 and S205), and calculates the electric energy related to each node having the hierarchical level “4” (step S203). In this specific example, since the nodes having a hierarchy level of “4” are a cable node and an air conditioner node, the simulation unit 15 first calculates the cable. As for the cable, as in the case of the connection box, the voltage and current output to the route side are both “0”. On the other hand, for the air conditioner, the attribute information shown in FIG. 8E, that is, the voltage “400 (V)”, the power consumption “12000 (W)”, and the operation rate “100 (%)” are read out. Since the rate is 100%, a voltage of 400 (V) and a current of 30 (A) are acquired. Since the air conditioner is an electric device that consumes electric power, the current is described as a negative value as shown in the fourth record in FIG. The fourth record shows that 400 × 30 = 12000 (W) is consumed at the node N008 at 0:00 on January 1, 2010. In addition, since the negative sign (minus sign) of the current indicates that power is consumed, a positive value may be used when the current value is used in later calculations.

  Next, the simulation unit 15 updates the counter to “3” (steps S204 and S205), and calculates the electric energy related to each node having the hierarchical level “3” (step S203). In this specific example, since the node having a hierarchy level of “3” is a PCS node and a transformer node, the simulation unit 15 first calculates the PCS. As for the PCS, as in the case of the cable, the voltage and current output to the route side are both “0”. On the other hand, for the transformer, the attribute information is indicated by the second record in FIG. 8B, and the voltage 400 (V) and the current 30 (A) are consumed at the node N008 of the air conditioner that is a child node of the transformer. Therefore, the voltage and current on the root side are calculated as described in the simulation for the transformer. In this calculation, it is assumed that the current 30 (A) is used, and the current of the calculation result is attached with a minus sign and accumulated in FIG. As a result, the voltage at the node N007 at 0 o'clock on January 1, 2010 is 200 (V), and the current is −61.4 (A).

  Next, the simulation unit 15 updates the counter to “2” (steps S204 and S205), and calculates the electric energy related to each node having the hierarchical level “2” (step S203). In this specific example, since the node having the hierarchical level “2” is a transformer node, the simulation unit 15 calculates the voltage and current on the root side in the same manner as described above. In the calculation, since the current on the leaf side is a negative value “−61.4 (A)”, the simulation unit 15 uses the formula when power is consumed on the leaf side of the transformer. Calculation shall be performed. As a result, the voltage at the node N003 at 0:00 on January 1, 2010 is 20 k (V), and the current is −0.664 (A).

  Next, the simulation unit 15 updates the counter to “1” (steps S204 and S205), and calculates the electric energy related to each node having the hierarchical level “1” (step S203). In this specific example, the node “1” at the hierarchical level is the node of the connection point, and its child node is only the node N003, and there is no reduction in the amount of power at the connection point, so the node N001 of the connection point The voltage and current are the same as those of the node N003. Therefore, the electric energy at the interconnection point for 1 hour on January 1, 2010 is 0 k (V) × (−0.664) (A) = − 13.28 (kWh). Therefore, at the connection point in that hour, the amount of power of 13.28 (kWh) is supplied from the outside of the power generation system, that is, from the commercial power system (electric power company).

  Thereafter, since the calculation until 23:00 on December 31, 2010 has not been completed, it is determined that the calculation is repeated (steps S204 to 206), and the simulation unit 15 sets 1 at 1 o'clock on January 1, 2010. Calculation in time is performed (steps S202 to S205). Thereafter, the calculation is performed every hour.

  Here, a case where power generation by a solar cell is performed, that is, a simulation at 9:00 on January 1, 2010 will be briefly described. In that case, as shown in FIG. 16, the solar altitude is 22.08 degrees and the azimuth is 142.51 degrees. Further, as shown in FIG. 8 (d), since the azimuth angle of the solar cell is 180 degrees and the inclination angle is 30 degrees, the simulation unit 15 uses them to calculate the solar rays and the solar cell. Calculate the cosine of the angle with the normal. Its cosine is “0.693”. The cosine may be calculated as follows, for example. First, both the direction of solar rays and the normal direction of solar cells are expressed using angles of the same coordinate system (for example, polar coordinate system). Next, the inner product of the unit vector in the direction of sunlight in the coordinate system and the unit vector in the direction normal to the solar cell is calculated. Then, the value of the inner product of the two unit vectors becomes the cosine of the angle formed by the solar ray and the normal line of the solar cell. Further, referring to the January solar radiation ratio 85 (%) in FIG. 15, the simulation unit 15 generates a current 0.693 × 0.85 × 2≈1.178 (A ) Is calculated. Since the number information corresponding to the node N006 in the tree structure information shown in FIG. 13 is “5”, the simulation unit 15 obtains a value obtained by multiplying the current by 5 1.178 × 5 = 5.89 (A). Are stored as the current of the node N006 at 9:00 on January 1, 2010, as shown in FIG.

  Next, in the connection box that is closer to the root node by one layer than the solar cell, the current value on the upper node side of the solar cell is simply multiplied by 100, so the current of the node N005 is 5.89 × 100 = 589 ( A).

Next, the simulation unit 15 performs calculation related to the cable that is closer to the root node by one layer than the connection box. Therefore, the simulation unit 15 refers to the attribute information shown in FIG. 8C corresponding to the cable and calculates the resistance of the cable. In this specific example, all the cables are assumed to be copper wires. Further, 1.78 × 10 ⁻⁸ (Ω · m) is used as the volume resistivity of copper. Therefore, the resistance is 1.78 × 10 ⁻⁸ × 500 / (100 × 10 ⁻⁶ ) = 0.089 (Ω). Since the current on the leaf side of the cable is 589 (A), the voltage drop in the cable is 2 × 0.089 × 589≈105 (V). Therefore, the voltage on the route side of the cable is 500−105 = 395 (V). Note that the voltage and current of the node N002 corresponding to the air conditioner are 400 (V) and −30 (A), as described above.

  Next, the simulation unit 15 performs calculation related to the orthogonal transformer that is closer to the root node by one layer than the cable. The power on the route side of the cable is 395 × 589 = 232655 (W), and 90% of the power is converted into an alternating current with a voltage of 200 (V), so the voltage and current on the route side of the orthogonal transformer are 200 ( V), 232655 × 0.9 / 200≈1047 (A). Note that the voltage and current of the node N007 corresponding to the transformer, which is the parent node of the air conditioner, are 200 (V) and −61.4 (A), as described above.

  Next, the simulation unit 15 performs calculation related to a transformer that is closer to the root node by one layer than the orthogonal transformer. The current on the root side of the node N002 corresponding to the orthogonal transformer that is a child node of the transformer is 1047 (A), and the current on the root side of the node N007 corresponding to the transformer that is a child node of the transformer is −61. Since 4 (A), the current on the leaf side of the transformer is 1047-61.4≈986 (A). Accordingly, when the voltage and current on the root side of the node N003 are calculated in the same manner as described above, they are 20 k (V) and 9.77 (A). Therefore, the voltage and current of the node N001 corresponding to the interconnection point are also the same as the node N003. In this way, the calculation at 9:00 on January 1, 2010 is completed. The result is as shown in FIG. Therefore, at 1 hour on January 1st, 2010, at the connection point, a power amount of 20 k × 9.77≈195 (kWh) is output from the power generation system to the outside, that is, to the commercial power system (electric power company). Will be.

  The simulation unit 15 performs such calculation until December 23rd at 23:00, and calculates the total amount of electric power per hour at the interconnection point. As a result, it is assumed that the total amount of power for one year at the interconnection point is ABC (kWh). Then, the output unit 16 displays “ABC (kWh)” that is the simulation result (step S115). The display allows the user to know the amount of power in one year of 2010. Note that the output unit 16 may output information indicating the voltage and current of each node shown in FIGS. 17 and 18, for example. By viewing the output, the user can identify a node with a large reduction in power, and can change the design of the power generation system accordingly. For example, referring to FIG. 18, it can be seen that the voltage drop in the cable is large. Therefore, the user may change the design so that the voltage drop in the cable does not increase by shortening the length of the cable or increasing the cross-sectional area of the cable. Moreover, you may make a design change in another location.

  It is assumed that the user has inserted node N009 of a cable having two cables between the interconnection point (node N001) and the transformer (node N003). Then, the tree structure information is changed accordingly (steps S104 to S106). Thereafter, when the user clicks the “consistency detection” button, the reception unit 12 receives a detection instruction regarding consistency (step S110), and the consistency detection unit 14 performs a detection process regarding consistency (step S111). ). Specifically, the consistency detection unit 14 identifies the node N002 corresponding to the orthogonal transformer, and traces the parent node of the node N002, thereby detecting the cable existing from the node of the orthogonal transformer to the root node. Detect nodes. In this case, the node N009 of the cable is detected, and the consistency detecting unit 14 determines whether or not the attribute information corresponding to the cable on the route side from the orthogonal transformer corresponds to the DC cable. The consistency detector 14 refers to the attribute information of the node N002 to acquire the AC wiring method “3-wire”. And when the cable which exists in the route | root side rather than an orthogonal transformation device is not "3-wire", it means that the cable does not respond | correspond to alternating current. Therefore, the consistency detection unit 14 obtains the number of cables “2” from the attribute information of the node N009, and since there are not three, the consistency detection unit 14 has an inconsistency in the cable corresponding to the node N009. Detect what to do. As described above, the mismatch is not detected on the leaf side of the orthogonal transformer, and the description thereof is omitted. Thereafter, the output unit 16 outputs that there is a mismatch in the cable corresponding to the node N009 (step S112). This output may be, for example, displaying a graphic indicating inconsistency at the display position corresponding to the node N009. The user can delete the node or change the attribute of the node according to the output of the detection result regarding the consistency.

  The receiving unit 12 may receive an instruction to delete an existing node, and the changing unit 13 may delete the node according to the instruction. In that case, in the node information of the node whose parent node is the node to be deleted, the node information is updated so that the node ID of the parent node of the node to be deleted becomes the parent node ID. . The receiving unit 12 may receive an instruction to update an existing node, and the changing unit 13 may update the node information according to the instruction.

  Moreover, the simulation part 15 may perform a simulation by considering factors other than the said description. For example, the simulation unit 15 may perform the simulation in consideration of a decrease in the amount of power generation according to the shadow on the solar cell panel caused by buildings around the solar cell. When considering the shadow, the simulation unit 15 may consider a reduction in the amount of power generation corresponding to the shadow, for example, by multiplying the amount of power not generated by the shadow on the panel by the amount of power generated by the panel. .

It goes without saying that an intermediate node corresponding to the boosting unit may exist. The step-up unit performs step-up with direct current. For example, if a leaf node of a solar cell that generates 500 V and a leaf node of a solar cell that generates 300 V have the same parent node, the 500 V solar cell is caused by the voltage difference between the two leaf nodes. An electric current will flow to the 300V solar cell. Therefore, in that case, a boosting unit is provided as a parent node of the leaf node of the 300V solar cell, and the boosting unit boosts 300V to the same voltage (in this case, 500V) as the other leaf nodes. It is possible to prevent a current from flowing from one leaf node to another leaf node. Also in the boosting unit, power loss occurs due to boosting. Therefore, for example, the power on the route side may be calculated as in the case of the orthogonal transformer. For example, the voltage on the root side is a boosted voltage (in the above example, 500 V). Further, the current on the root side can be calculated in the same manner as in the case of the orthogonal transformer. Note that the efficiency of the boosting unit may be constant, or may be set for each voltage or power width on the leaf side.
Further, the information such as the solar radiation ratio is shown for explanation of this specific example, and does not necessarily follow the actual weather information.

  As described above, according to the power generation system design apparatus 1 according to the present embodiment, it is possible to design an arbitrary power generation system represented by a tree structure. For example, it is possible to design freely from a small scale such as a household power generation system to a large scale such as a power generation system that generates power as a business. In addition, it is possible to simulate the amount of power that can be generated in the power generation system designed as described above. In addition, since a dummy intermediate node can be set, it is possible to know the amount of power at a location where no node exists.

  Note that the output unit 16 may also output attribute information corresponding to nodes in the tree structure. For example, the reception unit 12 also receives an instruction (for example, mouse over, click, tap, etc.) for specifying a node in the tree structure output by the output unit 16, and the output unit 16 receives the instruction received by the reception unit 12. The attribute information corresponding to the node specified by may be output. For example, in FIG. 14, when the mouse pointer is placed on the PCS (mouse over), the output unit 16 corresponds to the ID “orthogonal transformer 001”, which is attribute information corresponding to the node N002 of the PCS. The attribute information to be read may be read from the tree structure information storage unit 11 and the attribute information may be output.

  The output unit 16 may output each node of the tree structure and at least a part of the attribute information corresponding to each node. For example, in FIG. 14, “DC 250 to 600 V, AC 200 V (three-phase three-wire), 90%” may be displayed on the node N002 of the PCS. Alternatively, a part of the information may be displayed. For example, “DC 250 to 600 V, AC 200 V (three-phase three-wire)” may be displayed.

  In the tree structure indicated by the tree structure information stored in the tree structure information storage unit 11, an intermediate node corresponding to the intermediate that is a cable and an intermediate node corresponding to the intermediate that is a DC / AC converter are When included, the changing unit 13 sets the attribute information corresponding to the cable on the leaf side of the intermediate node corresponding to the DC / AC converter according to the DC cable, and more than the intermediate node corresponding to the DC / AC converter. The attribute information corresponding to the cable on the route side may be in accordance with the AC cable. That is, when inputting cable attribute information, the number of cables on the leaf side of the orthogonal transformer is automatically set to “2”, and the number of cables on the root side of the orthogonal transformer is set. May be automatically set to the same number as the AC wiring system of the orthogonal transformer. The same number as the wiring system means that the number is set to N when the wiring system is “N line”. By doing in this way, generation | occurrence | production of the mismatch regarding the number of cables can be prevented. Therefore, in this case, it is not necessary to detect the consistency of the cable. When the detection related to the consistency is not performed, the power generation system design device 1 may not include the consistency detection unit 14.

  Moreover, although the simulation part 15 demonstrated the case where the electric power amount for every hour was calculated in this Embodiment, it may not be so. The amount of power may be calculated every time zone other than one hour, for example, every two hours or every three hours. For example, when calculating the electric energy every three hours, the voltage and current every three hours are calculated, and the electric energy corresponding to the three hours is calculated using the calculated voltage and current. Moreover, the simulation part 15 may calculate the electric energy for every day. For example, using the average of the cosine of the solar ray and the normal of the solar cell, the average daily voltage and current at the solar cell node and other nodes are calculated. The daily amount of electricity may be calculated using the daily sunshine hours. Also, for a representative day of the month (for example, 15th, etc.), the amount of power for one month is calculated by calculating the amount of power for the day and multiplying the amount of power by the number of days in one month. The amount may be calculated. In this case, the amount of electricity for one year can be calculated by calculating the amount of electricity for 12 days per month.

  In the present embodiment, a case has been described in which the leaf nodes included in the tree structure are only those corresponding to the power generators of natural energy, but this need not be the case. For example, a leaf node corresponding to the battery may be included in the tree structure. In that case, an intermediate node corresponding to a charge / discharge controller that controls charging / discharging exists at an upper node of the battery. The intermediate node corresponding to the charge / discharge controller is usually a node having the same parent node as the intermediate node corresponding to the orthogonal transformer. In the charge / discharge controller, conversion between direct current and alternating current, charge control, and discharge control are performed. At the time of simulation, the charge / discharge controller may perform the calculation assuming that the behavior is the same as that of the orthogonal transformer. In the simulation, it may be calculated that the battery behaves in the same manner as an electric device that consumes power during charging, and behaves like a solar cell during discharging. Whether the battery is discharged or charged is determined by the charge / discharge controller. Therefore, at the time of simulation, the battery discharge / charge may be determined by making a determination similar to that of the charge / discharge controller. In the simulation, the charge amount of the battery may be stored in association with the leaf node corresponding to the battery.

  Further, in the dummy intermediate node, it may be possible to set a time and a time zone when the dummy intermediate node is effective. For example, by setting such a dummy intermediate node in an upper node of an electric device that consumes power, it becomes possible to specify a time and a time zone in which the electric device consumes power. For example, the time may be specified by month, may be specified by day of the week, or may be specified by both. The time zone may be specified, for example, from 7 o'clock to 9 o'clock or from 17 o'clock to 21 o'clock. Specifically, if a setting is made that a range from 7 o'clock to 9 o'clock is valid from Monday to Friday of every month for a certain dummy intermediate node, the setting is made during simulation. The total amount of power on the leaf side of the dummy intermediate node is the amount of power on the root side only during the time and time period (that is, from 7:00 to 9:00 from Monday to Friday). In the band (that is, other than 7:00 to 9:00 from Monday to Friday, and all day on Saturday and Sunday), the total amount of power on the root side of the dummy intermediate node is zero. When such a dummy intermediate node is used, it is not necessary to set the operation rate as the attribute information of the leaf node corresponding to the electric device that consumes power. By using the dummy intermediate node in which the effective time and time zone are set, there is an advantage that the time zone and time to be used can be collectively set for a plurality of electric devices during simulation. For example, it is considered that a plurality of electric devices (for example, an air conditioner and a television set) existing in the same room are often used at the same time. In such a case, a plurality of electric devices existing in the same room is used. By using the dummy intermediate node, it is possible to make a setting to operate only at the same time and time.

  Further, in the present embodiment, the case where the node corresponding to the interconnection point is the root node has been described. However, this need not be the case. For example, for one root node, there may be child nodes corresponding to a plurality of interconnection points whose simulation conditions are changed. Even in that case, in the actual design or simulation, the design or simulation is performed on the partial tree structure having the node corresponding to the interconnection point as the root node. Therefore, even in such a case, it can be considered that the tree structure has a node corresponding to the interconnection point as a root node by paying attention to the partial tree structure.

  In addition, options related to the power generation system and parameters may be set. The option setting is a setting as to whether or not various options of the power generation system are taken into consideration, for example, a setting as to whether or not a shadow on the panel of the solar cell is taken into consideration. The parameter setting is a parameter setting used in the power generation system, for example, a temperature characteristic setting of the solar cell. Such option settings and parameter settings may be managed as child nodes of the root node corresponding to the interconnection point. In that case, the node related to the setting of the option or the setting of the parameter is not a calculation target of the electric energy in the simulation. In addition, specific data for option settings and parameter settings may be displayed in the tree structure, or when a node corresponding to option settings or parameter settings is selected in the tree structure, the selection Specific data of option settings and parameter settings corresponding to the designated nodes may be displayed. Further, the simulation unit 15 may perform a simulation at the time of simulation by referring to the option settings and parameter settings.

  As described above, the tree structure indicated by the tree structure information includes at least a root node corresponding to the interconnection point (this root node may be a root node in the partial tree structure as described above), power generation Any tree structure may be used as long as it indicates a parent-child relationship between a leaf node corresponding to a device and an intermediate node corresponding to an intermediate object, and the tree structure may further include nodes corresponding to other elements.

  In addition, the consistency detection unit 14 may perform detection related to consistency other than detection of consistency related to the cable. When an upper limit voltage or current is set for a cable, an orthogonal transformer, a transformer, a booster unit, or the like, the possibility of exceeding the upper limit may be detected as a mismatch. In this inconsistency detection, for example, a simulation is performed when power generation under standard test conditions or 100% power generation is performed at a leaf node corresponding to a power generation device, and at that time, it is determined whether or not the upper limit is exceeded at each node. However, if the upper limit is exceeded, inconsistency may be detected. In addition, using the simulation result by the simulation unit 15, when the voltage or current on the leaf side or the voltage or current on the root side of a certain node exceeds the set upper limit voltage or current, consistency detection is performed. The unit 14 may detect inconsistency. Further, the consistency detection unit 14 has a configuration in which the voltage on the root side of the boosting unit is not determined even though there is an intermediate node corresponding to the boosting unit in the tree structure (in this case, If the boosting unit does not know how much the voltage on the leaf side should be boosted), the mismatch may be detected.

Moreover, although the calculation method about the solar cell at the time of simulation was mentioned above, the calculation method is an example and it cannot be overemphasized that different calculation may be performed. Normally, power, voltage, and current generated by a solar cell under standard test conditions are disclosed as the nominal output of the solar cell. Therefore, when the nominal output is included in the attribute information, a simulation may be performed using the nominal output. Specifically, the amount of solar radiation under standard test conditions is 1000 W / m ² . Therefore, the nominal output is an output when the solar radiation amount is 1000 W / m ² . In addition, it is assumed that the amount of solar radiation of each hour of each month averaged using past weather information (for example, the average for the past 20 years) is stored in a recording medium (not shown). Here, the amount of solar radiation can be divided into direct solar radiation corresponding to direct sunlight and scattered solar radiation corresponding to scattered light. In addition, a function that can calculate the ratio between the amount of direct solar radiation and the amount of scattered solar radiation with the solar position (solar altitude and azimuth angle of the sun) as an argument (here called “direct-scattering / scattering ratio function”) Is known). Therefore, the simulation unit 15 reads the amount of solar radiation “P (W / m ² )” in the month and day in which the simulation is performed. Moreover, the sun position corresponding to the date and time zone is acquired, and the ratio of the direct solar radiation amount corresponding to the solar position and the scattered solar radiation amount is acquired using the direct / scattering ratio function. It is assumed that the ratio between the direct solar radiation amount and the scattered solar radiation amount is Q: (1-Q). However, 0 ≦ Q ≦ 1. The amount of scattered solar radiation reaches the solar cell regardless of the direction of the normal line of the solar cell, but the amount of direct solar radiation is the amount obtained by multiplying the cosine (cos θ) of the angle θ between the solar ray and the normal line of the solar cell. Will reach the solar cell. Therefore, the amount of solar radiation used for power generation in the solar cell is P × {Q × cos θ + (1−Q)} (W / m ² ). As a result, power generation is performed at a rate of P × {Q × cos θ + (1−Q)} / 1000. Therefore, the voltage and current on the root side of the solar cell are as follows.
Root side voltage = nominal output voltage (V)
Route side current = P × {Q × cos θ + (1−Q)} × nominal output current / 1000 (A)
Therefore, the simulation part 15 may calculate the electric energy of a solar cell using this type | formula instead of the above-mentioned type | formula.

In the above calculation method for the cable at the time of simulation, the case where the voltage drop is calculated has been described. However, even if the calculation is performed assuming that the power loss corresponding to the voltage drop is replaced with the current loss and the voltage does not change. Good. In this case, if the voltage on the leaf side of the cable is D (V), the total current on the leaf side is E (A), and the resistance of the cable is R (Ω), the voltage on the route side of the cable The current is as follows:
Cable route side voltage = D (V)
Current on the route side of the cable = E−K × R × E ² / D (A)
Further, when there is an electric device that consumes power on the leaf side of the cable, the following equation is obtained.
Cable route side voltage = D (V)
Cable side current = E + K x R x E ² / D (A)
Therefore, the simulation unit 15 may calculate the power amount of the cable using these formulas instead of the above formulas.

  In addition, when the dummy intermediate node in which the effective time and the time zone are set exists in the upper node of the electric device that consumes power, the simulation unit 15 operates 100% up to the dummy intermediate node. The power consumption is calculated in the same way as the rate, and in the calculation at the dummy intermediate node, if the calculation target time and time zone are not valid time or time zone, the voltage on the root side of the dummy intermediate node If the current and power are set to 0, and the time and time zone to be calculated are valid times and time zones, the voltage, current and power on the root side of the dummy intermediate node are It may be the same as the voltage, current, and power on the side.

  The simulation unit 15 calculates the power loss at each intermediate node as a current loss as described in the above cable, and the simulation is performed so that the voltage does not change between the leaf side and the root side of the intermediate node. May be performed. That is, an expression that allows the simulation unit 15 to perform such a calculation may be set. In this way, when the intermediate node or the root node has a plurality of child nodes, it becomes easy to equalize the voltages on the root side of the plurality of child nodes.

  In addition, for example, for each node, the simulation unit 15 determines the voltage, current, and power on the leaf side, the voltage, current, and power on the root side, and the power decreased on the node (= leaf power−root power) ) May be calculated. Such information may be stored in a recording medium (not shown) and output by the output unit 16. Further, although not the simulation result, the leaf side wiring method and the route side wiring method of each node may be stored together with the simulation result together with the voltage and current of each node.

  In the present embodiment, the case where the power generation system design apparatus 1 includes the simulation unit 15 has been described. However, when the simulation is not performed, the power generation system design apparatus 1 may not include the simulation unit 15. In this case, the device is designed only. Even in such a case, it is preferable that the attribute information included in the tree structure information includes the necessity for the simulation so that the simulation can be performed in another device or the like.

  Moreover, although this embodiment demonstrated the case where the electric power generation system design apparatus 1 was provided with the consistency detection part 14, when not performing the detection regarding consistency, the electric power generation system design apparatus 1 sets the consistency detection part 14 in it. It does not have to be provided.

  Further, in the present embodiment, a case has been described in which there are leaf nodes corresponding to electric devices that consume power, intermediate nodes corresponding to cables, connection boxes, orthogonal transformers, transformers, and the like. Of these, one or more nodes may not exist. Further, although the dummy intermediate node has been described, the dummy intermediate node may not be included in the tree structure.

  Moreover, although the said embodiment demonstrated the case where the electric power generation system design apparatus 1 was stand-alone, the electric power generation system design apparatus 1 may be a stand-alone apparatus, and may be a server apparatus in a server client system. Good. In the latter case, the output unit or the reception unit may receive input or output information via a communication line.

  In the above embodiment, each process or each function may be realized by centralized processing by a single device or a single system, or may be distributedly processed by a plurality of devices or a plurality of systems. It may be realized by doing.

  In the above embodiment, the information exchange between the components is performed by one component when, for example, the two components that exchange the information are physically different from each other. It may be performed by outputting information and receiving information by the other component, or when two components that exchange information are physically the same, one component May be performed by moving from the phase of the process corresponding to to the phase of the process corresponding to the other component.

  In the above embodiment, information related to processing executed by each component, for example, information received, acquired, selected, generated, transmitted, or received by each component In addition, information such as threshold values, mathematical formulas, addresses, etc. used by each component in processing is retained temporarily or over a long period of time on a recording medium (not shown) even when not explicitly stated in the above description. It may be. Further, the storage of information in the recording medium (not shown) may be performed by each component or a storage unit (not shown). Further, reading of information from the recording medium (not shown) may be performed by each component or a reading unit (not shown).

  In the above embodiment, when information used by each component, for example, information such as a threshold value, an address, and various setting values used by each component may be changed by the user Even if it is not specified in the above description, the user may be able to change the information as appropriate, or it may not be. If the information can be changed by the user, the change is realized by, for example, a not-shown receiving unit that receives a change instruction from the user and a changing unit (not shown) that changes information in accordance with the change instruction. May be. The change instruction received by the receiving unit (not shown) may be received from an input device, information received via a communication line, or information read from a predetermined recording medium, for example. .

  In the above embodiment, when two or more components included in the power generation system design apparatus 1 have communication devices, input devices, etc., the two or more components have a physically single device. Or may have separate devices.

  In the above embodiment, each component may be configured by dedicated hardware, or a component that can be realized by software may be realized by executing a program. For example, each component can be realized by a program execution unit such as a CPU reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory. In addition, the software which implement | achieves the electric power generation system design apparatus 1 in the said embodiment is the following programs. In other words, this program has a root node corresponding to the interconnection point, a leaf node corresponding to the power generator of natural energy, and an intermediate node corresponding to the intermediate that is present in the path from the interconnection point to the power generation device. Can access a tree structure information storage unit in which tree structure information is stored, which is attribute information indicating attributes related to generation or reduction of power corresponding to each node. Information on the instruction to generate a new child node for an existing node in the tree structure, child node generation instruction information that is information including attribute information of the child node, and an existing parent-child relationship in the tree structure This is information on an instruction to generate a new intermediate node between two nodes and receives intermediate node generation instruction information which is information including attribute information of the intermediate node. When the receiving unit and the receiving unit receive the child node generation instruction information, the attribute information included in the child node generation instruction information and the child node corresponding to the attribute information are added to the tree structure information, and the receiving unit generates the intermediate node When the instruction information is received, the attribute information included in the intermediate node generation instruction information and the change unit for adding the intermediate node corresponding to the attribute information to the tree structure information, the tree structure indicated by the tree structure information can be visually recognized. It is a program for functioning as an output unit that outputs to the.

  In the program, the functions realized by the program do not include functions that can be realized only by hardware. For example, functions that can be realized only by hardware such as a modem and an interface card in a reception unit that receives information and an output unit that outputs information are not included in at least the functions realized by the program.

  Further, this program may be executed by being downloaded from a server or the like, and a program recorded on a predetermined recording medium (for example, an optical disk such as a CD-ROM, a magnetic disk, a semiconductor memory, or the like) is read out. May be executed by Further, this program may be used as a program constituting a program product.

  Further, the computer that executes this program may be singular or plural. That is, centralized processing may be performed, or distributed processing may be performed.

  FIG. 19 is a schematic diagram illustrating an example of an external appearance of a computer that executes the program and realizes the power generation system design apparatus 1 according to the embodiment. The above-described embodiment can be realized by computer hardware and a computer program executed on the computer hardware.

  19, the computer system 900 includes a computer 901 including a CD-ROM (Compact Disk Read Only Memory) drive 905, a keyboard 902, a mouse 903, and a monitor 904.

  FIG. 20 is a diagram illustrating an internal configuration of the computer system 900. In FIG. 20, in addition to the CD-ROM drive 905, a computer 901 is connected to an MPU (Micro Processing Unit) 911, a ROM 912 for storing a program such as a boot-up program, and the MPU 911. A RAM (Random Access Memory) 913 that temporarily stores and provides a temporary storage space, a hard disk 914 that stores application programs, system programs, and data, and a bus 915 that interconnects the MPU 911, ROM 912, and the like Prepare. The computer 901 may include a network card (not shown) that provides connection to the LAN.

  A program for causing the computer system 900 to execute the function of the power generation system design apparatus 1 according to the above embodiment may be stored in the CD-ROM 921, inserted into the CD-ROM drive 905, and transferred to the hard disk 914. Instead, the program may be transmitted to the computer 901 via a network (not shown) and stored in the hard disk 914. The program is loaded into the RAM 913 when executed. The program may be loaded directly from the CD-ROM 921 or the network.

  The program does not necessarily include an operating system (OS) or a third-party program that causes the computer 901 to execute the functions of the power generation system design apparatus 1 according to the above embodiment. The program may include only a part of an instruction that calls an appropriate function (module) in a controlled manner and obtains a desired result. How the computer system 900 operates is well known and will not be described in detail.

  Further, the present invention is not limited to the above-described embodiment, and various modifications are possible, and it goes without saying that these are also included in the scope of the present invention.

  As described above, according to the power generation system design apparatus and the like according to the present invention, the effect that an arbitrary power generation system represented by a tree structure can be designed is obtained, which is useful as an apparatus for designing a power generation system.

DESCRIPTION OF SYMBOLS 1 Power generation system design apparatus 11 Tree structure information storage part 12 Reception part 13 Change part 14 Consistency detection part 15 Simulation part 16 Output part

Claims (9)

A parent-child relationship between a root node corresponding to a connection point, a leaf node corresponding to a power generator of natural energy, and an intermediate node corresponding to an intermediate that is present in the path from the connection point to the power generation device A tree structure information storage unit for storing tree structure information that is attribute information indicating attributes relating to generation or reduction of power corresponding to each node,
It is information of an instruction to generate a new child node for an existing node in the tree structure, child node generation instruction information that is information including attribute information of the child node, and an existing parent-child relationship in the tree structure A receiving unit that receives intermediate node generation instruction information that is information on an instruction to generate a new intermediate node between two nodes and includes information on the attribute of the intermediate node;
When the reception unit receives child node generation instruction information, the attribute information included in the child node generation instruction information and a child node corresponding to the attribute information are added to the tree structure information, and the reception unit is an intermediate node A change unit that adds attribute information included in the intermediate node generation instruction information and an intermediate node corresponding to the attribute information to the tree structure information when receiving the generation instruction information;
An output unit for outputting the tree structure indicated by the tree structure information so that the tree structure can be visually recognized ,
The tree structure information includes a tree structure indicating one subtree structure having a parent node as a parent when a plurality of the same subtree structures having the same parent node as a parent exist in the tree structure in parallel. Information and number information indicating the number of the same subtree structure,
The reception unit also receives number information,
The power generation system design device , wherein the changing unit adds the number information received by the receiving unit to the tree structure information . A parent-child relationship between a root node corresponding to a connection point, a leaf node corresponding to a power generator of natural energy, and an intermediate node corresponding to an intermediate that is present in the path from the connection point to the power generation device A tree structure information storage unit for storing tree structure information that is attribute information indicating attributes relating to generation or reduction of power corresponding to each node,
It is information of an instruction to generate a new child node for an existing node in the tree structure, child node generation instruction information that is information including attribute information of the child node, and an existing parent-child relationship in the tree structure A receiving unit that receives intermediate node generation instruction information that is information on an instruction to generate a new intermediate node between two nodes and includes information on the attribute of the intermediate node;
When the reception unit receives child node generation instruction information, the attribute information included in the child node generation instruction information and a child node corresponding to the attribute information are added to the tree structure information, and the reception unit is an intermediate node A change unit that adds attribute information included in the intermediate node generation instruction information and an intermediate node corresponding to the attribute information to the tree structure information when receiving the generation instruction information;
An output unit for outputting the tree structure indicated by the tree structure information so that the tree structure can be visually recognized,
The tree structure includes an intermediate node corresponding to an intermediate that is a cable, and an intermediate node corresponding to an intermediate that is a DC / AC converter,
The changing unit has attribute information corresponding to the cable on the leaf side of the intermediate node corresponding to the DC / AC converter corresponding to the DC cable, and the cable on the route side of the intermediate node corresponding to the DC / AC converter. A power generation system design device that has corresponding attribute information corresponding to the AC cable. A parent-child relationship between a root node corresponding to a connection point, a leaf node corresponding to a power generator of natural energy, and an intermediate node corresponding to an intermediate that is present in the path from the connection point to the power generation device Information of a tree structure including an intermediate node corresponding to an intermediate that is a cable and an intermediate node corresponding to an intermediate that is a DC / AC converter, and corresponding to each node A tree structure information storage unit for storing tree structure information that is attribute information indicating attributes relating to generation or reduction of power;
It is information of an instruction to generate a new child node for an existing node in the tree structure, child node generation instruction information that is information including attribute information of the child node, and an existing parent-child relationship in the tree structure A receiving unit that receives intermediate node generation instruction information that is information on an instruction to generate a new intermediate node between two nodes and includes information on the attribute of the intermediate node;
When the reception unit receives child node generation instruction information, the attribute information included in the child node generation instruction information and a child node corresponding to the attribute information are added to the tree structure information, and the reception unit is an intermediate node A change unit that adds attribute information included in the intermediate node generation instruction information and an intermediate node corresponding to the attribute information to the tree structure information when receiving the generation instruction information;
In the tree structure information, the attribute information corresponding to the cable on the leaf side of the intermediate node corresponding to the DC / AC converter corresponds to the mismatch corresponding to the AC cable, and the intermediate information corresponding to the DC / AC converter A consistency detector that detects mismatches in which attribute information corresponding to the cable on the route side corresponds to the DC cable;
An output system design apparatus comprising: an output unit that outputs a tree structure indicated by the tree structure information so that the tree structure can be visually recognized, and outputs a mismatch detected by the consistency detection unit. A parent-child relationship between a root node corresponding to a connection point, a leaf node corresponding to a power generator of natural energy, and an intermediate node corresponding to an intermediate that is present in the path from the connection point to the power generation device A tree structure information storage unit for storing tree structure information, which is attribute information indicating attributes relating to generation or reduction of power corresponding to each node, a reception unit, and a change unit And a power generation system design method processed using the output unit,
A first accepting step for accepting child node generation instruction information, which is information on an instruction for generating a new child node for an existing node in the tree structure, and the information includes attribute information of the child node; ,
When the changing unit receives the child node generation instruction information in the first reception step, the attribute information included in the child node generation instruction information and the child node corresponding to the attribute information are added to the tree structure information A first changing step to:
An intermediate node generation instruction that is information on an instruction for generating a new intermediate node between two existing nodes having a parent-child relationship in the tree structure, and that includes attribute information of the intermediate node A second accepting step for accepting information;
When the change unit receives the intermediate node generation instruction information in the second reception step, the attribute information included in the intermediate node generation instruction information and the intermediate node corresponding to the attribute information are added to the tree structure information A second change step to:
An output step for outputting the output unit so that the tree structure indicated by the tree structure information can be visually recognized ;
The tree structure information includes a tree structure indicating one subtree structure having a parent node as a parent when a plurality of the same subtree structures having the same parent node as a parent exist in the tree structure in parallel. Information and number information indicating the number of the same subtree structure,
In the first or second receiving step, the number information is also received,
In the first or second changing step, the power generation system design method of adding the number information received in the first or second receiving step to the tree structure information . A parent-child relationship between a root node corresponding to a connection point, a leaf node corresponding to a power generator of natural energy, and an intermediate node corresponding to an intermediate that is present in the path from the connection point to the power generation device A tree structure information storage unit for storing tree structure information, which is attribute information indicating attributes relating to generation or reduction of power corresponding to each node, a reception unit, and a change unit And a power generation system design method processed using the output unit,
A first accepting step for accepting child node generation instruction information, which is information on an instruction for generating a new child node for an existing node in the tree structure, and the information includes attribute information of the child node; ,
When the changing unit receives the child node generation instruction information in the first reception step, the attribute information included in the child node generation instruction information and the child node corresponding to the attribute information are added to the tree structure information A first changing step to:
An intermediate node generation instruction that is information on an instruction for generating a new intermediate node between two existing nodes having a parent-child relationship in the tree structure, and that includes attribute information of the intermediate node A second accepting step for accepting information;
When the change unit receives the intermediate node generation instruction information in the second reception step, the attribute information included in the intermediate node generation instruction information and the intermediate node corresponding to the attribute information are added to the tree structure information A second change step to:
An output step for outputting the output unit so that the tree structure indicated by the tree structure information can be visually recognized;
The tree structure includes an intermediate node corresponding to an intermediate that is a cable, and an intermediate node corresponding to an intermediate that is a DC / AC converter,
In the first and second changing steps, the attribute information corresponding to the cable on the leaf side of the intermediate node corresponding to the DC / AC converter corresponds to the DC cable, and the intermediate node corresponding to the DC / AC converter is used. A method for designing a power generation system, in which attribute information corresponding to the cable on the route side corresponds to the AC cable. A parent-child relationship between a root node corresponding to a connection point, a leaf node corresponding to a power generator of natural energy, and an intermediate node corresponding to an intermediate that is present in the path from the connection point to the power generation device Information of a tree structure including an intermediate node corresponding to an intermediate that is a cable and an intermediate node corresponding to an intermediate that is a DC / AC converter, and corresponding to each node Using a tree structure information storage unit that stores tree structure information that is attribute information indicating attributes relating to generation or reduction of power, a reception unit, a change unit, a consistency detection unit, and an output unit A power generation system design method to be processed,
A first accepting step for accepting child node generation instruction information, which is information on an instruction for generating a new child node for an existing node in the tree structure, and the information includes attribute information of the child node; ,
When the changing unit receives the child node generation instruction information in the first reception step, the attribute information included in the child node generation instruction information and the child node corresponding to the attribute information are added to the tree structure information A first changing step to:
An intermediate node generation instruction that is information on an instruction for generating a new intermediate node between two existing nodes having a parent-child relationship in the tree structure, and that includes attribute information of the intermediate node A second accepting step for accepting information;
When the change unit receives the intermediate node generation instruction information in the second reception step, the attribute information included in the intermediate node generation instruction information and the intermediate node corresponding to the attribute information are added to the tree structure information A second change step to:
In the tree structure information, the consistency detection unit has a mismatch in which the attribute information corresponding to the cable on the leaf side of the intermediate node corresponding to the DC / AC converter corresponds to the AC cable, and the DC / AC converter A consistency detecting step for detecting mismatching in which attribute information corresponding to a cable on a route side from an intermediate node corresponding to the one corresponding to a DC cable;
A first output step for outputting the output unit so that the tree structure indicated by the tree structure information can be visually recognized;
A power generation system design method comprising: a second output step in which the output unit outputs a mismatch detected in the consistency detection step. A parent-child relationship between a root node corresponding to a connection point, a leaf node corresponding to a power generator of natural energy, and an intermediate node corresponding to an intermediate that is present in the path from the connection point to the power generation device A computer capable of accessing a tree structure information storage unit in which tree structure information is stored, which is attribute information indicating attributes related to generation or reduction of power corresponding to each node.
It is information of an instruction to generate a new child node for an existing node in the tree structure, child node generation instruction information that is information including attribute information of the child node, and an existing parent-child relationship in the tree structure A receiving unit that receives intermediate node generation instruction information that is information on an instruction to generate a new intermediate node between the two nodes, and includes attribute information of the intermediate node;
When the reception unit receives child node generation instruction information, the attribute information included in the child node generation instruction information and a child node corresponding to the attribute information are added to the tree structure information, and the reception unit is an intermediate node A change unit that adds the attribute information included in the intermediate node generation instruction information and the intermediate node corresponding to the attribute information to the tree structure information when receiving the generation instruction information;
Function as an output unit that outputs so that the tree structure indicated by the tree structure information can be visually recognized ;
The tree structure information includes a tree structure indicating one subtree structure having a parent node as a parent when a plurality of the same subtree structures having the same parent node as a parent exist in the tree structure in parallel. Information and number information indicating the number of the same subtree structure,
The reception unit also receives number information,
The change unit adds the number information received by the receiving unit to the tree structure information . A parent-child relationship between a root node corresponding to a connection point, a leaf node corresponding to a power generator of natural energy, and an intermediate node corresponding to an intermediate that is present in the path from the connection point to the power generation device A computer capable of accessing a tree structure information storage unit in which tree structure information is stored, which is attribute information indicating attributes related to generation or reduction of power corresponding to each node.
It is information of an instruction to generate a new child node for an existing node in the tree structure, child node generation instruction information that is information including attribute information of the child node, and an existing parent-child relationship in the tree structure A receiving unit that receives intermediate node generation instruction information that is information on an instruction to generate a new intermediate node between the two nodes, and includes attribute information of the intermediate node;
When the reception unit receives child node generation instruction information, the attribute information included in the child node generation instruction information and a child node corresponding to the attribute information are added to the tree structure information, and the reception unit is an intermediate node A change unit that adds the attribute information included in the intermediate node generation instruction information and the intermediate node corresponding to the attribute information to the tree structure information when receiving the generation instruction information;
Function as an output unit that outputs so that the tree structure indicated by the tree structure information can be visually recognized;
The tree structure includes an intermediate node corresponding to an intermediate that is a cable, and an intermediate node corresponding to an intermediate that is a DC / AC converter,
The changing unit has attribute information corresponding to the cable on the leaf side of the intermediate node corresponding to the DC / AC converter corresponding to the DC cable, and the cable on the route side of the intermediate node corresponding to the DC / AC converter. A program that sets corresponding attribute information according to the AC cable. A parent-child relationship between a root node corresponding to a connection point, a leaf node corresponding to a power generator of natural energy, and an intermediate node corresponding to an intermediate that is present in the path from the connection point to the power generation device Information of a tree structure including an intermediate node corresponding to an intermediate that is a cable and an intermediate node corresponding to an intermediate that is a DC / AC converter, and corresponding to each node A computer capable of accessing a tree structure information storage unit in which tree structure information, which is attribute information indicating attributes relating to generation or reduction of power, is stored;
It is information of an instruction to generate a new child node for an existing node in the tree structure, child node generation instruction information that is information including attribute information of the child node, and an existing parent-child relationship in the tree structure A receiving unit that receives intermediate node generation instruction information that is information on an instruction to generate a new intermediate node between the two nodes, and includes attribute information of the intermediate node;
When the reception unit receives child node generation instruction information, the attribute information included in the child node generation instruction information and a child node corresponding to the attribute information are added to the tree structure information, and the reception unit is an intermediate node A change unit that adds the attribute information included in the intermediate node generation instruction information and the intermediate node corresponding to the attribute information to the tree structure information when receiving the generation instruction information;
In the tree structure information, the attribute information corresponding to the cable on the leaf side of the intermediate node corresponding to the DC / AC converter corresponds to the mismatch corresponding to the AC cable, and the intermediate information corresponding to the DC / AC converter A consistency detection unit that detects mismatching in which attribute information corresponding to the cable on the route side corresponds to the DC cable;
A program for outputting a tree structure indicated by the tree structure information so that the tree structure can be visually recognized, and functioning as an output unit for outputting a mismatch detected by the consistency detection unit.

Images