JP2006310780A - Solar energy power generation system - Google Patents

Solar energy power generation system Download PDF

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JP2006310780A
JP2006310780A JP2006050987A JP2006050987A JP2006310780A JP 2006310780 A JP2006310780 A JP 2006310780A JP 2006050987 A JP2006050987 A JP 2006050987A JP 2006050987 A JP2006050987 A JP 2006050987A JP 2006310780 A JP2006310780 A JP 2006310780A
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power generation
generation system
data
display device
power
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JP2006050987A
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Japanese (ja)
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Keiko Kaneuchi
啓晃 金内
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Kyocera Corp
京セラ株式会社
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Priority to JP2005096102 priority
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Priority to JP2006050987A priority patent/JP2006310780A/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00Integration of renewable energy sources in buildings
    • Y02B10/10Photovoltaic [PV]
    • Y02B10/14PV hubs
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar energy power generation system comprising a display device in which improvement of precision of diagnosis and early detection for abnormality and failure are enabled without lack of interest from a user. <P>SOLUTION: This solar energy power generation system comprises a solar battery, a power conversion device for converting a DC power generated by the solar battery into an AC power, a display device for displaying power generation data of the solar battery, a memory for recording the power generation data, and a processor for calculating the power generation data. The power generation data of the solar battery is recorded in the memory. When there is a variation larger than a specified amount in the power generation data, the fact of variation is displayed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a display method in which a user is likely to be interested and a photovoltaic power generation system having a function capable of improving the amount of power generation and determining a failure without the user's recognition.

  A method for displaying generated power and purchased / sold power in a conventional solar power generation system will be described with reference to FIG.

  The generated power photoelectrically converted by the solar cell 1 is collected in the junction box 2 and input to the power converter 3. The power conversion device 3 is connected to a commercial power source 5 or a household load 6 via an AC distribution board 4 and supplies the generated power to the commercial power source 5 in reverse flow or to the household load 6. is there. In the solar power generation system, in order to see the generated power of the solar cell 1 or the like, it is built in the main body of the power conversion device 3 or a display unit such as the display device 7 is provided separately from the power conversion device 3, Abnormal driving is visible. In general, the power conversion device 3 is located near the AC distribution board 4 and easily draws the power transmission line from the connection box 2, such as near the ceiling, entrance hall, and washroom, in consideration of heat dissipation and connection with the electrical wiring inside. In many cases, the display unit provided in the main body of the power conversion device 3 is difficult to visually recognize unless the user intends to check it. Therefore, it is preferable that the display device 7 is provided separately from the power conversion device 3 so as to be easily seen by the user, and is installed in a place where the visual recognition is easy. On the other hand, when the display device 7 and the power conversion device 3 are separated, the routing of the data communication cable for exchanging information such as generated power impairs the aesthetics of the house, and it is difficult to construct the wiring in the wall. Or problems such as limitation of the routing distance due to signal attenuation occur. Therefore, the transmission unit 8 is provided inside or outside the power conversion device 3 and the receiving unit 9 is provided inside or outside the display device 7 to transfer data by wireless communication, and the display unit 9 generates generated power and integrated power. It is preferable to display information such as power.

  In this way, the generated power and power consumption are periodically displayed on the display device 7 in graphs and numerical values in an environment that is easy to visually recognize, visually recognizing the difference between consumption and generated power, and the effect of reducing CO2 emissions, Knowing how much power is wasted can encourage users to always be aware of their power savings.

  In addition, there are many other display contents that can also be displayed for abnormalities and failures in the photovoltaic power generation system, and display is made for abnormalities and failures in power converters and abnormalities and failures in the commercial power system. Even when an abnormality or failure occurs, it can be recognized immediately.

  However, if the graph display or numerical display is used to visually capture the power generation and power consumption data of the solar power generation system, there is no specific problem presentation and a relatively abstract display (expression). As a result, users without specialized knowledge vaguely capture changes in power consumption. In addition, the contents displayed in the photovoltaic power generation system are mainly the accumulated power generation amount, the consumed power generation amount, and the instantaneous power generation amount, and these numerical data are the installation capacity, installation direction and the solar cell of the solar power generation system. The range of changes in numerical values is determined to some extent depending on the conditions such as the installation angle and the weather conditions of the installation area. For this reason, immediately after the installation of the photovoltaic power generation system, the accumulated data gives a novel impression, and there is no prior knowledge about changes in the data. I'm interested and watch the display device to know if there is a change in the data, but if I understand the contents of the data change to some extent, the similar changes will disappear and I will try to check the display device. The willingness is reduced, and not only the display related to the amount of electric power, which is the significance of installation of the display device, but also the transmission of warnings about the occurrence of various abnormalities is delayed.

  In addition, when an abnormality or failure occurs, the event that causes it must be immediately removed, but in the past, simply displaying the details of the abnormality or failure and informing the occurrence, Although the event that occurred could be recognized, but the user could not recognize the cause, there was the annoyance that had to contact the manufacturer or sales company with specialized knowledge about the solar power generation system and wait for the countermeasure. Also, manufacturers and sales companies had to understand the situation at the site to know how to deal with them, and it took time and effort to re-release them because they did not have the parts needed for repair.

  As a means to solve such problems, the visual perception of the user by giving a variety of changes by displaying animations in addition to graphs and numerical values based on the amount of power generation and power consumption. A method of a display device system for improving the performance has been proposed (see, for example, Reference 1).

  Further, for determining abnormality or failure of the photovoltaic power generation system, a display method for diagnosing the cause of the failure by making full use of various measuring devices and complicated programs has been proposed (for example, see Reference 2). ).

Furthermore, a method of monitoring the state of the photovoltaic power generation system via a constant information communication network has been considered (for example, see Reference 3).
JP 2002-297229 A JP 2001-326375 A JP 2002-305844 A

  However, for example, in addition to the display contents related to power generation and consumption, such as the accumulated power generation amount, the power generation power consumption, and the instantaneous power generation amount, even if the display is performed using a specific environmental index such as the CO2 reduction amount, Even if the willingness to contribute to the environment persists, we will not continue to look at the numerical value of the display device.

  Moreover, even if the display of numerical data in the photovoltaic power generation system is richly changed using animation as in Patent Document 1, even if the display does not lose interest in the display, the animation The patterns are also finite and it is difficult to sustain the interest of the user regarding the display of the solar power generation system.

  For example, as a means to solve this problem, when a special screen or music is sounded according to the integrated power consumption, it is actively aroused, and a function to prevent interest in the display contents from being lost is provided. Or, there is a display method that expresses the integrated power consumption with CO2 conversion display and deforestation reduction display to make the user interested in the environment. In such a display method, At the stage, the amount of CO2 reduction and deforestation will increase immediately and will be intriguing, but when it reaches a certain amount, the digit of the value will increase, and the degree of change will become difficult to see, and the interest will fade. Also, even if the special screen is displayed when the accumulated power generation amount is 100% or 1000, it will be interesting at that moment, but it will take a very long time until the next special screen. On the contrary, in the meantime, it is predicted that the event will not occur, and it may be recognized that it is okay even if it is not seen, and the arousing effect may be further diminished.

  In this way, losing interest in the display device of the photovoltaic power generation system will not be transmitted even if notification of maintenance or minor problems are presented on the display part, resulting in a problem at a later date. (For example, not knowing that the decrease in the amount of solar power generation is an external factor and sufficient power generation is not possible. Etc.)

  In addition, a user who is familiar with solar power generation will check the display device with an interest in the state of the solar power generation system. Therefore, generally, a method is used in which changes are confirmed by comparing current data with reference to past data. For this reason, when confirming in detail, it is necessary to grasp past information on the user side.

  Also, if you check every day, you will check the change in the daily unit, so the problem that has gradually changed from the previous day is not noticed by the user, the problem occurs conversely In some cases, it is impossible to predict the situation and the problem will occur after a problem occurs.

  Furthermore, even if the user notices a change in the amount of power generated by the photovoltaic power generation system or a change in the power consumption, it is normal to know what the cause is due to the degree of knowledge of the photovoltaic power generation possessed by the user. Whether it is within the range or within the abnormal range may or may not be determined. Therefore, as a result, the user simply collects data and records a large amount of generated power, and records a small amount of information, so that the user can continue to be interested without finding any other use. In addition to the display that cannot be performed, the range of further effective utilization is limited by the difference in the knowledge of the users.

  In general, current display devices simply indicate numerical values, and the user must actively determine what the numerical values mean, and in order to make that determination Can not make a correct judgment without specialized knowledge of electricity and expertise of the photovoltaic power generation system. It had become. In addition, even if the power generation amount is simply large or small, the user has to memorize the comparison reference, which involves complicated work and loses interest in the display of the photovoltaic power generation system. It will cause.

  In addition, regarding the determination of abnormality or failure of the photovoltaic power generation system, in order to determine the abnormality or failure of the photovoltaic power generation system, a solar radiation meter or temperature / humidity meter is added to increase measurement accuracy with new data. In such a case, when the device is increased, the anxiety factor of the photovoltaic power generation system is increased when the device is broken. In addition, since a general solar power generation system is usually used for 10 years or more, if the number of devices increases, it will be necessary to take into consideration the aspect of life, etc., and the solar power generation system becomes complicated. End up. In addition, there is a problem that labor is increased even when constructing and installing a complicated photovoltaic power generation system.

  In addition, with conventional technology, it is possible to display information on instantaneous abnormalities or malfunctions in the photovoltaic power generation system, but abnormalities have occurred in specialized manufacturers and contractors regarding the causes of such malfunctions and malfunctions. I must tell you. At that time, in order to allow the manufacturer and contractor to prepare appropriate repair methods, the situation of the system, the state of use, the situation of use, and the weather However, it is very difficult to explain the situation of the system in a logical manner because many users have limited expertise in solar power generation. Therefore, depending on the degree of abnormality or failure, specialized manufacturers and contractors go to the site to grasp the status of the solar power generation system, and after various measurement data are measured, they can not enter the repair work. This is a very complicated task for both users and manufacturers. In addition, during that period, power generation must be stopped from a safety standpoint, resulting in a loss of power generation. Also, if the user tries to guide the system status logically with a booklet, etc., the system status is complicated and the question patterns are enormous. Just looking for what to do will require a lot of labor, will reduce the willingness to pursue the cause, and the booklet itself will also become thicker, so the amount of paper resources will increase.

  In addition, when a solar power generation system is constantly monitored through a communication network such as the Internet so that an abnormality or failure can be immediately determined, the communication network is always occupied, and the amount of data measured is extremely high. Therefore, it will be necessary to take troublesome work such as server management.

  Also, in the case of special situations that depend on the decline in power generation due to deterioration over time or the installation location of the photovoltaic power generation system, not abnormalities or malfunctions, for example, the shadows of trees are applied to the solar cells only in summer and the output is reduced. In the case of a decrease, the judgment is complicated to determine whether the output of the solar cell is abnormal or whether the sunshine is insufficient. Many external measuring instruments are required.

  Therefore, the object of the present invention is to improve the accuracy of diagnosis of abnormalities and failures and to detect early by allowing the user to determine the state of the photovoltaic power generation system through the display device with the participation of the user himself / herself. To maintain the interest by providing guidance on further effective use of the photovoltaic power generation system by conveying the meaning of the numerical value to the user, and also changing the power generation situation in which the user is most interested It is to provide a solar power generation system that allows the user to maintain interest in the solar power generation system by emphasizing and telling the user when this occurs.

  Another object of the present invention is to enable the user to easily grasp the state of the photovoltaic power generation system, and not to grasp the cause of a failure or abnormal state using a complicated device configuration. Without assembling logical causes, it is possible to easily recognize the status of failures and abnormalities, facilitate communication with manufacturers and contractors, and correctly check the system status of maintenance management and photovoltaic power generation systems. An object of the present invention is to provide a solar power generation system including a display system provided with a guidance function for guiding the operation.

  In order to solve the above problems, a solar power generation system of the present invention displays a solar cell, a power conversion device that converts DC power generated by the solar cell into AC power, and power generation data of the solar cell. A photovoltaic power generation system comprising a display device, a memory unit that records power generation data, and a processing unit that calculates power generation data, wherein the power generation data of the solar cell is recorded in the memory unit, and the power generation data is predetermined. When there is a change as described above, a display indicating that there has been a change is made.

  In another photovoltaic power generation system according to the present invention, when the power generation data has a predetermined change or more, it is displayed in an emphasized manner according to the importance of the change.

  In addition, another photovoltaic power generation system of the present invention is characterized in that, when there is a predetermined change or more in the power generation data, an event estimated by the change is displayed.

  Furthermore, another photovoltaic power generation system according to the present invention is characterized in that when there is a change in data to be recorded, remote transmission is performed through an information communication network according to the importance of the change.

  In addition, another solar power generation system of the present invention includes a solar cell, a power conversion device that converts DC power generated by the solar cell into AC power, and a display device that displays the power generation status of the solar cell. In the case of a solar power generation system, when a situation where an occurrence of abnormality is inferred in the solar power generation system occurs, the display device requests the user to collect information for investigating the cause of the occurrence of the abnormality, The cause of the occurrence of the abnormality is specified by the user inputting the information.

  Furthermore, in another photovoltaic power generation system of the present invention, the display device is connected to a center having weather information through an information communication network, and the weather information of the center is referred to when the user inputs the information. It is characterized by that.

  According to the solar power generation system of the present invention, a solar cell, a power conversion device that converts DC power generated by the solar cell into AC power, a display device that displays power generation data of the solar cell, and power generation A photovoltaic power generation system comprising a memory unit for recording data and a processing unit for calculating power generation data, wherein the power generation data of the solar cell is recorded in the memory unit, and the power generation data has a predetermined change or more. In the case of a change, a display indicating that there has been a change has been made, so that unlike the conventional display device, the amount of generated power and the amount of power consumed are simply updated and displayed in graphs and numerical values. This makes it possible for a person to easily recognize the difference between the state of the current photovoltaic power generation system and the current photovoltaic power generation system, and when this change occurs, the display unit Special table Or making a sound effect, it is possible to increase the recognition of changes, thereby enabling the user to use the display device without getting tired of the display device. As a result, it is possible to create a situation where the user is constantly monitoring the system status, and monitoring the generated power minimizes the loss of the generated power due to abnormalities in the PV system and misconfigurations. In addition to having the economic effect of reducing power consumption to a low level, it is possible to quickly detect abnormalities in the photovoltaic power generation system, which is also effective in terms of safety in maintenance and maintenance. Solar power generation that can increase the economic efficiency in the home by energy saving, because the user has higher energy conservation awareness than the device System is a display system.

  In addition, according to another photovoltaic power generation system of the present invention, when the power generation data changes more than a predetermined value, according to the importance of the change, the display is emphasized. It can be expected that the effects mentioned will be further enhanced.

  In addition, according to another photovoltaic power generation system of the present invention, when there is a change in data to be recorded, according to the importance of the change, it is remotely transmitted through an information communication network. The user can expect an effect that can provide a sense of security for the photovoltaic power generation system and an effect that makes it easy to know the necessity of maintenance and maintenance at an early stage, and that the user can interact with the display device. Because it keeps the interest, it has the effect of raising awareness of power saving and energy saving, and in turn raising interest in global environmental issues.

  Furthermore, according to another photovoltaic power generation system of the present invention, when there is a change in the data to be recorded, according to the importance of the change, by remote transmission through the information communication network, Even when the display device cannot be confirmed due to the absence of the user, the administrator can check the state of the change, providing the user with a greater sense of security, and at the same time being more effective in terms of maintenance management. It becomes a display device of a solar power generation system.

  In addition, according to another photovoltaic power generation system of the present invention, when checking the status or searching for the cause of failure or abnormality, the visual status of the photovoltaic power generation system that can be visually confirmed by the user, the weather status, the power generation status, By inputting to the determination unit as a material for determining abnormality or failure, it is possible to determine an abnormal situation with a simple circuit configuration. The user does not need specialized knowledge about the photovoltaic power generation system, and by inputting necessary information according to the flowchart shown in the display unit 211, the user can grasp the power generation status, abnormality, and failure state. This basic information is logically assembled and reported according to the flowchart, so that when a serious abnormality or failure occurs, the event can be accurately communicated to experts such as manufacturers and contractors. It is safe and easy to maintain, and has the effect of reducing the complexity of maintenance management.

  Further, in the display configuration unit in the display device, by having a function of hierarchically determining the importance of change, for example, when a large number of changes occur at the same time, emphasize a high priority, In addition, by having a function of preferentially emphasizing things with a large range of change, it can be expected that the effects described above can be further enhanced by conveying the meaning of the change to the user.

  Further, in the determination unit, when a change occurs in comparison with the data stored in the storage unit based on the data of the generated power amount and the power consumption amount obtained from the photovoltaic power generation system, For the meaning of changes, the cause that the judgment unit guesses is displayed, and the display contents are displayed hierarchically and concretely from abstract expressions, and the diagnosis of the cause of the change is diagnosed in cooperation with the user. By proceeding with the process, the user can understand the cause of the change, which gives a sense of security to the photovoltaic power generation system. In addition, since the user can interact with the display device, the user's ease of contact with the machine can be improved, and not only power saving and energy saving awareness but also interest in maintenance and output improvement can be raised.

  Note that the determination result data described above can be transmitted to the server 303 by providing the information communication network connection unit 302 to the power converter 301 as shown in FIG. , It is possible to collectively manage the history and numerical data for the results of the user's determination, and to make judgments based on accumulated data for abnormalities and failures with respect to secular changes, This has the effect of eliminating the complexity of recording changes one after another. In addition, it is possible to propose to the user the points necessary for investigating more detailed causes based on the judgment results. Therefore, it is possible to reduce the burden on both the user and the manufacturer, such as a person who performs maintenance intentionally due to a minor abnormality. There is an effect that.

  Hereinafter, embodiments of a photovoltaic power generation system according to the present invention will be described in detail based on the drawings schematically shown.

  As shown in FIG. 3, the electric power generated by the solar cell 401 is collected by the connection box 402 and input to the power converter 403. The power converter 403 orthogonally converts the input DC power into AC power, and supplies power to the commercial power system 419 via the AC distribution board 404 to the commercial power system 419 or the household load 420. Here, as the solar cell 401, a polycrystalline silicon solar cell, a single crystal silicon solar cell, a thin film solar cell such as amorphous silicon, or the like is preferably used, and a module in which a plurality of solar cells are collected is further connected in series and parallel. An array is generally arranged, and the output wiring of the solar cell module is synthesized in the junction box 402.

The output of the solar cell 401 synthesized in the connection box 402 is input to the power conversion device 403, and current, voltage, power, and the like are measured by the generated power measurement unit 412 and the power consumption measurement unit 413 in the power conversion device 403. And transmitted through the transmission unit 405. As the data transmitted at this time, the measured numerical value may be sent as it is, but the power amount and the integrated power may be calculated and the numerical value may be sent. Numerical data such as current and voltage is recorded in the recording unit 414 in the power converter 403. Then, based on the data in the recording unit 414, information obtained based on the data is transmitted to the display device 406 through the transmission unit 405 by the determination unit 415 in the power conversion device 403. The transmission form may be a wireless or wired connection method using a cable or a method of superimposing a data signal on a system voltage waveform. The transmitted data is received by the receiving unit 407 of the separately installed display device 406 and displayed on the display unit 408. The communication means between the transmission unit 405 and the reception unit 407 is preferably wireless. However, the transmission unit 405 may be provided outside the power conversion device 403, and a communication method using infrared rays may be provided for only a part of the straight section. In this case, the resistance to external noise and the structure can be simplified. The power supply to the display unit 408 and the like in the display device 406 is supplied from a commercial power source via the power supply unit 409.

  Of the various types of data displayed on the display device 406, data calculated as an integrated power amount may not be calculated by the power conversion device 403 but may be calculated by the microcomputer 410 in the display device 406. Good. By doing in this way, data, such as generated electric power, are memorize | stored in the non-volatile memory which makes a memory part, and also the power converter which performs the setting of the clock part 411 and the said clock part 411 in the said power converter device 403 By providing the operation unit 416, it is possible to display daily generated power, hourly generated power, and the like. Furthermore, the electric energy after one hour is predicted based on the integrated electric energy and the electric energy consumed in the home, for example, based on the integrated electric energy of 5 minutes. Also, since the date and time when the abnormal operation occurred can be left as data, even if the power generation amount at that time is low, valuable information such as whether the solar radiation has fallen in the morning or evening due to sudden changes in sunlight due to cloudy daylight You can get. In addition, the microcomputer 410 in the display device 406 is provided with a display configuration unit 417 for effectively displaying the data transmitted by the power conversion device 403. In the display device 406, the display device operation unit 418 is used when performing screen feed operation when there are a plurality of screens displayed by the display configuration unit 417 as necessary.

  Here, regarding the operation flow of the display method of the display device of the photovoltaic power generation system of the present invention, a flowchart of a method for effectively displaying when the measurement data of the photovoltaic power generation system that the user is most interested in changes. An example will be described in detail with reference to the schematic diagrams. In addition, as a system of the display apparatus of the photovoltaic power generation system used for description, the same system configuration as that shown in FIG. 3 will be used.

  As shown in FIG. 4, first, numerical data such as the amount of generated power is measured from the generated power measurement unit 412 and the power consumption measurement unit 413 in the power conversion device 403. Thereafter, the measured data is stored in the recording unit 414. The stored data is compared with the data recorded by the determination unit 415 according to a predetermined determination criterion as appropriate. Then, when there is a change, the data with change information is transmitted to the display device 406 through the transmission unit 405. The received data is received by the receiving unit 407 provided in the display device 406. The importance level for displaying the received data on the display configuration unit 417 is determined. When a plurality of changes occur simultaneously or compared with past changes, it is determined which items are to be displayed with priority and the highest emphasis. Then, according to this importance, the display unit 408 displays that a change has occurred.

  Specifically, instantaneous peak generated power data is stored in the storage unit 414, and the determination unit 415 compares the value as appropriate. When the instantaneous peak generated power updates the maximum value, data indicating update of the maximum value and numerical data of the maximum value are transmitted to the display device 406. The transmitted data is received by the receiving unit 407. The display configuration unit 417 then ranks for other changes and errors. As a result, when it is the most important change among the changes that have been made so far, the fact that this instantaneous peak generated power has been updated is displayed with the highest emphasis.

  As a result, the user does not need to refrain or store data from time to time, and can pick up and recognize that there has been a change. Being able to experience the movement and changes in the system allows you to continue to be interested in the solar power generation system, which allows the user to monitor the solar power generation system while enjoying and unconsciously. It becomes a display device of a solar power generation system that can be discovered early, and can be particularly effective for maintenance and entertainment that can reduce the amount of generated power and minimize accidents.

  In this system, the determination criterion of the determination unit 415 can be set manually by the power converter operation unit 416. Thereby, it is possible to display the data update information according to the user's preference. Similarly, it is assumed that the same operation can be performed in the comparison period of each data. For example, if the instantaneous peak generated power is recorded 3 times higher than the previous value in the past week, the value is The setting is to update. The clock unit 411 is used when setting this period.

  Next, a method in which the determination unit 415 determines a situation inferred from the data based on the data recorded by the recording unit 414, and displays the determination result to convey to the user. Will be described with reference to the flowchart of FIG. First, numerical data such as the amount of generated power is measured from the generated power measuring unit 412 and the power consumption measuring unit 413 in the power converter 403. Thereafter, the measured data is stored in the recording unit 414. The stored data is compared with the data recorded by the determination unit 415 according to a predetermined determination criterion as appropriate. Then, when it is estimated that the photovoltaic power generation system is in a state to be displayed, the data with report information is transmitted to the display device 406 through the transmission unit 405. The received data is received by the receiving unit 407 provided in the display device 406. Based on the received data, the display configuration unit 417 displays the report item cause in a hierarchical manner so that the user can estimate the cause of the report item.

  Specifically, first, when the determination unit 415 confirms the data in the storage unit 414, the accumulated power generation amount for the past one week, which is one of the report item items, is 50% of the installed capacity of the solar cell. % Or less. At this time, information indicating this is transmitted to the receiving unit 407 provided in the display device 406 via the transmitting unit 405. In response to this information, the display configuration unit 417 performs display based on the information so that the user can investigate the cause of the occurrence in a hierarchical manner. For example, as the first screen, a comment “A day with low power generation continues for a week” is displayed. On the other hand, if the user cannot guess the cause or cause, the process proceeds to the second screen. At this time, the screen feed operation is performed by the user through the display device operation unit 418. The second screen shows the probable cause. "Is there a shadow?" "How was the weather?" And if the user determines that it is related to the weather, the third screen “The amount of power generation on a rainy day will be lower than the amount of power generation on a sunny day.” "The power generation may be recorded" and the influence of the weather on the photovoltaic power generation system.

  By doing so, it is possible to avoid overlooking the gradual change of the photovoltaic power generation system, display the cause that the judgment part guesses about the contents that each data means, and display the display contents from the abstract expression. By shifting to a specific display hierarchically and diagnosing the cause of the change, the user can understand the cause of the change. As a result, it is possible to expect an effect that can provide a sense of security for the solar power generation system and an effect that makes it easy to determine the time when maintenance is required, and it can be used by interacting with the display device and the user. Contributing to maintaining the interests of consumers, raising awareness of energy conservation and energy conservation, and in turn increasing the interest in global environmental issues.

  In this example, the case where the situation is conveyed only by characters has been described as an example. However, in terms of enhancing interactivity, a method may be used in which a unique character is displayed on the display screen to notify the user in a conversational manner.

  In addition, the amount of generated power has been described this time with regard to the criteria, but this is not a limitation, and there are few information that can be used as multiple criteria that can be applied to multiple events that apply to PV system events. It is preferable to increase the accuracy of the question.

  Furthermore, in this example, the case where processing is completed in the photovoltaic power generation system has been described as an example, but information communication is performed via an information communication network connection unit 302 provided in the power conversion device 301 as illustrated in FIG. A method of connecting to the server 303 through a network is also conceivable. By performing collective management with the server 303 or the like, even if the user is absent and the display device 304 cannot be confirmed, the administrator side can confirm the change state, so that the user can feel secure even during the absence period. At the same time, it is a display device of a solar power generation system that is more effective than conventional in terms of maintenance management. When communicating with the server, the unidirectional communication from the display device side can sufficiently satisfy the requirements, but by using bidirectional communication, the power conversion device is stopped by remote operation, etc. Thus, the display device of the solar power generation system has a higher effect of eliminating the complicated operation of actually operating by a person.

  An embodiment of another photovoltaic power generation system according to the present invention will be described below in detail based on the drawings schematically shown.

    As shown in FIG. 6, the photovoltaic power generation system includes a solar cell 401, a power conversion device 403, and a display device 406. The power conversion device 403 includes a generated power measurement unit 412, a power consumption measurement unit 413, a recording unit 414 including a memory unit, a clock unit 411, a determination unit 415, a power conversion device operation unit 416, and a transmission unit 405. The display device 406 includes a receiving unit 407, a display unit 408, a microcomputer unit 410, an input unit 421, and a display device operation unit 418.

  Since the flow of the electric power generated by the solar cell 401 has been described with reference to FIG. 3, it will be omitted and a specific example of the display device will be described.

  The microcomputer 410 inside the display device 406 is provided with a display configuration unit 417 for effectively displaying the data transmitted by the power conversion device 403. At this time, in the display device 406, when there are a plurality of screens displayed by the display configuration unit 417 as necessary, a display operation unit 418 is used to perform a screen feed operation. By using 418 when answering the flow of the survey content necessary to determine the state of the failure or abnormality or the state of the solar power generation system, the user investigated by further providing an input unit 421 Data can also be input as part of the determination data.

  In addition, although not essential, the power conversion device 403 may include the information communication network connection unit 423 connected to the information communication network 422 to enable information communication with the server 424.

  Next, the outline and operation of the entire system will be described using the flowchart of FIG. 7 schematically showing the display method of the display device of the photovoltaic power generation system of the present invention.

  As shown in FIG. 7, when a change occurs in measurement data such as a change in power generation status, abnormality, or failure in the photovoltaic power generation system, a status display indicating the possibility is first displayed on the display unit 408. The user is then asked whether to investigate the cause of the situation. The user looks at the display device 406 and operates the display operation unit 418 to select the cause or not (when the cause is known such as construction is being performed) and investigate the cause. If the user selects to perform, the information necessary for the user is answered through the input unit 421 and the display operation unit 418 according to the questions of the display device 406 shown on the display unit 408 sequentially. For this question, you may enter a fixed value, such as the nominal power generation capacity of a conventional PV system, but what about the weather around the house at that time ( It is desirable to use a lot of visual information that is relatively difficult to check using equipment, such as whether there is a shower or the like, whether there is any shadow on the roof, or whether it is dirty. Information that cannot be known only with the sensors of such devices is essential in investigating the cause, and guides the user in a form that can be confirmed even by users without special knowledge to confirm environmental information for analysis of the cause. By making necessary data available, information for investigating the cause is accumulated, and by analyzing the situation based on the information, it is possible to derive a more accurate cause. Finally, the result of analysis is displayed on the display unit 408 of the display device 406.

  Next, a flowchart of a method for effectively displaying individual parts in the flowchart when the abnormality, failure, or measurement data changes in the photovoltaic power generation system will be described with reference to FIG.

  First, numerical data such as the amount of generated power is measured from the generated power measuring unit 412 and the power consumption measuring unit 413 in the power converter 403. Thereafter, the measured data is stored in the recording unit 414. The stored data is compared with the data recorded by the determination unit 415 according to a predetermined determination criterion as appropriate. Then, when there is a change, the data with change information is transmitted to the display device 406 through the transmission unit 405. The received data is received by the receiving unit 407 provided in the display device 406. The importance level for displaying the received data on the display configuration unit 417 is determined. When a plurality of changes occur simultaneously or compared with past changes, it is determined which items are to be displayed with priority and the highest emphasis. Then, according to this importance, the display unit 408 displays that a change has occurred.

  Specifically, for example, data of accumulated generated power for a certain period is stored in the storage unit 414, and the determination unit 415 compares the value appropriately. Then, when a period in which the value of the integrated power amount does not reach a certain amount of power generation occurs, it is determined that there is an abnormality or failure in the photovoltaic power generation system, and a display indicating that the cause investigation is to be performed is performed. .

  Next, a procedure for investigating the cause will be described with reference to the flowchart of FIG. Here, a case where the accumulated power generation amount of the solar power generation system is reduced will be described as an example. First, several questions are asked. For example, users who do not have specialized knowledge such as `` Is the solar cell shaded? '', `` How was the weather during the period? '', `` Is the grid voltage high? '' Even if the instructions are followed, observable questions are sequentially displayed on the display unit 408. In response to the question, the user inputs answer data using the display device operation unit 418 or the input unit 421. As a result, for example, by adding visual information that the weather is good, the cause of the decrease in the power generation output is not an abnormality of the solar cell, but the output of the solar cell is accompanied by an increase in the system voltage observed by the voltage sensor. You can conclude that there is a restriction and present it to the user. Conventionally, in such an example, even if the output of the solar cell is measured with a sensor, the voltage is high, but the current does not flow because the current is suppressed on the commercial power system side, so it is assumed that the solar cell is abnormal However, according to the method of the present invention, the cause of the abnormality or failure is logically clarified even when a correct cause is inferred for such a phenomenon and the manufacturer is requested to deal with it. Therefore, it is possible to respond smoothly.

  Further, as another example regarding the question content, by using the data of the recording unit 414 and the determination unit 415, it is possible to provide a question near the core of the cause. In the above example, the question “Is there a shadow on the solar cell” alone is very vague and the user does not know when and how to investigate. Therefore, if the data of the recording unit 414 or the determination unit 415 determines that the output of the solar cell is decreasing between 2 pm and 3 pm, for example, the user displays the status of the solar cell at the specified time. Check it. As a result, the user is alone in the fact that the output has fallen due to the influence of the shadow that the user did not expect, such as the season, the state of the leaves, the influence of the building constructed after installing the solar cell This makes it possible to make an objective determination. Further, in the weather situation, the day when the generated power is low is picked up by the data of the recording unit 414 and the determination unit 415. The user obtains the weather condition of the day when the output is low through the information communication network 423 and the server 424. By comparing with the amount of power generated based on the obtained information, it is possible for the user to determine whether the output reduction of the photovoltaic power generation system of the day is due to the weather or other causes It becomes.

  Also in the example described above, “shadows are made on the solar cell panel” “shadows such as fallen leaves are made on the solar cell panel” “weather conditions on a certain day” using electric devices Complex equipment is required for sensing. However, by using a display device as in the present invention, a user who does not have specialized knowledge about the photovoltaic power generation system can solve the problem by simply answering the logically configured question flow chart. A simple photovoltaic power generation system can be provided without using a failure cause system that uses a complicated circuit configuration because the user can be guided so that the correct procedure is performed toward be able to. Furthermore, by simply checking the status of the solar power generation system on its own, the user will have a sense of familiarity with the solar power generation system, and will be motivated to further improve power generation and save electricity.

  As described above, in the present invention, without using a complicated circuit configuration or many electrical devices such as sensors, based on information from the user, logically abnormal or malfunction of the photovoltaic power generation system, current situation, etc. Can be grasped even by users who do not have specialized knowledge.

  Furthermore, in this example, the case of unidirectional communication was introduced in the solar power generation system, but more effective maintenance can be performed by performing bidirectional communication with the server. By performing collective management with the server 424 or the like, even if the user is absent and the display device 406 cannot be confirmed, the administrator side can confirm the state of change, and at the same time, the user can further feel secure. It becomes a display device of a photovoltaic power generation system that is more effective than conventional in terms of maintenance management. When communicating with the server, the unidirectional communication from the display device side can sufficiently satisfy the requirements, but by using bidirectional communication, the power conversion device is stopped by remote operation, etc. Thus, the display device of the solar power generation system has a higher effect of eliminating the complicated operation of actually operating by a person.

  In addition, this time, we explained by taking the output reduction of the photovoltaic power generation system as an example, but in addition to this, we investigate the cause of any abnormalities such as abnormal sounds and abnormal vibrations, which seems to be abnormal or faulty, interactively with the user. It is possible to do.

  In addition, it is not limited to abnormalities or failures. For example, in the same method, it is possible to make a search for improvement for performance improvement such as what is a negative factor for ideal generated power. It is possible to perform a high factor analysis.

It is a schematic circuit block diagram which illustrates typically the embodiment of the conventional photovoltaic power generation system which concerns on this invention. It is the schematic explaining typically the embodiment using the information communication network in the solar energy power generation system which concerns on this invention. 1 is a schematic circuit diagram schematically illustrating an embodiment of a solar power generation system according to the present invention. It is a flowchart figure in the case of highlighting and displaying that the measured value of the solar energy power generation system which concerns on this invention changed. It is a flowchart figure in the case of displaying the event estimated by the measured value of the solar energy power generation system which concerns on this invention. 1 is a schematic circuit diagram schematically illustrating an embodiment of a solar power generation system according to the present invention. It is an operation | movement flowchart figure which shows the outline of the electric power generation condition of the photovoltaic power generation system which concerns on this invention, an abnormality, and the cause investigation of failure. It is a flowchart figure which shows the method of displaying effectively when abnormality, failure, and measurement data of the solar power generation system which concern on this invention change. It is a flowchart figure explaining the procedure at the time of conducting the cause investigation of the photovoltaic power generation system concerning the present invention.

Explanation of symbols

1: Solar cell 2: Junction box 3: Power conversion device 4: AC distribution board 5: Commercial power supply 6: Home load 7: Display device 8: Transmission unit 9: Reception unit 201: Power conversion device 202: Measurement of generated power Unit 203: power consumption measurement unit 204: recording unit 205: determination unit 206: clock unit 207: transmission unit 208: display device 209: reception unit 210: display configuration unit 211: display unit 212: operation unit 213: power supply unit 301: Power conversion device 302: Information communication network connection unit 303: Server 304: Display device 401: Solar cell 402: Connection box 403: Power conversion device 404: AC distribution board 405: Transmission unit 406: Display device 407: Reception unit 408: Display unit 409: Power supply unit 410: Microcomputer unit 411: Clock unit 412: Generated power measurement unit 413: Power consumption measurement unit 414: Recording unit 415: Determination unit 416: Power conversion device operation unit 17: display configuration unit 418: display operation unit 419: the commercial power source 420: domestic load

Claims (6)

  1. A solar cell, a power conversion device that converts DC power generated by the solar cell into AC power, a display device that displays power generation data of the solar cell, a memory unit that records power generation data, and power generation data A photovoltaic power generation system comprising a processing unit for calculating, wherein the power generation data of the solar cell is recorded in a memory unit, and if there is a change in the power generation data more than a predetermined value, an indication that there has been a change is displayed. A photovoltaic power generation system characterized in that it is performed.
  2. 2. The photovoltaic power generation system according to claim 1, wherein when the power generation data changes more than a predetermined value, the power generation data is displayed in an emphasized manner according to the importance of the change.
  3. The solar power generation system according to claim 1, wherein when the power generation data has a predetermined change or more, an event estimated by the change is displayed.
  4. The photovoltaic power generation system according to claim 1, wherein when there is a change in data to be recorded, remote transmission is performed through an information communication network according to the importance of the change.
  5. A solar power generation system comprising a solar cell, a power conversion device that converts DC power generated by the solar cell into AC power, and a display device that displays the power generation status of the solar cell, the solar power generation system When a situation in which the occurrence of an abnormality is inferred occurs, the display device requests that the user collect information for investigating the cause of the abnormality, and the user inputs the information to generate the abnormality. A solar power generation system characterized by identifying the cause of
  6. The display device is connected to a center having weather information through an information communication network,
    6. The photovoltaic power generation system according to claim 5, wherein when the user inputs the information, the weather information of the center is referred to.
JP2006050987A 2005-03-29 2006-02-27 Solar energy power generation system Pending JP2006310780A (en)

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Cited By (7)

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Publication number Priority date Publication date Assignee Title
WO2011101916A1 (en) 2010-02-19 2011-08-25 オーナンバ株式会社 Method for detecting failure of photovoltaic power system
WO2011104931A1 (en) * 2010-02-26 2011-09-01 株式会社 東芝 Fault diagnosis device and fault diagnosis method
JP2011181614A (en) * 2010-02-26 2011-09-15 Toshiba Corp Device and method for fault diagnosis
JP2011233584A (en) * 2010-04-23 2011-11-17 Toshiba Corp Abnormality diagnostic apparatus of photovoltaic power system
JP2014112582A (en) * 2012-12-05 2014-06-19 Pacific Ind Co Ltd Cluster state monitoring device
JP2014220393A (en) * 2013-05-09 2014-11-20 太平洋工業株式会社 Cluster state monitor
CN104485889A (en) * 2015-01-08 2015-04-01 江苏蓝天光伏科技有限公司 Failure detection method for photovoltaic power generation units with multiple same mounting dip angles

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011101916A1 (en) 2010-02-19 2011-08-25 オーナンバ株式会社 Method for detecting failure of photovoltaic power system
US8482309B2 (en) 2010-02-19 2013-07-09 Onamba Co., Ltd. Failure detecting method for a solar power generation system
WO2011104931A1 (en) * 2010-02-26 2011-09-01 株式会社 東芝 Fault diagnosis device and fault diagnosis method
JP2011181614A (en) * 2010-02-26 2011-09-15 Toshiba Corp Device and method for fault diagnosis
US9209743B2 (en) 2010-02-26 2015-12-08 Kabushiki Kaisha Toshiba Fault detection apparatus and fault detection method
AU2010346725B2 (en) * 2010-02-26 2013-11-28 Kabushiki Kaisha Toshiba Fault diagnosis device and fault diagnosis method
JP2011233584A (en) * 2010-04-23 2011-11-17 Toshiba Corp Abnormality diagnostic apparatus of photovoltaic power system
JP2014112582A (en) * 2012-12-05 2014-06-19 Pacific Ind Co Ltd Cluster state monitoring device
JP2014220393A (en) * 2013-05-09 2014-11-20 太平洋工業株式会社 Cluster state monitor
CN104485889A (en) * 2015-01-08 2015-04-01 江苏蓝天光伏科技有限公司 Failure detection method for photovoltaic power generation units with multiple same mounting dip angles

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