JP5004610B2 - Photovoltaic power generation system, management device, and power generation monitoring device - Google Patents

Description

  The present invention relates to a solar power generation system, a management device, and a power generation monitoring device, and particularly to a solar power generation system, a management device, and a power generation monitoring device that can prevent tampering of the amount of generated power.

  Currently, global warming is progressing due to carbon dioxide released from thermal power generation, automobiles, factories, and the like. For this reason, solar power generation is attracting attention as clean energy that does not emit carbon dioxide.

  A photovoltaic power generation system is installed as a distributed power source on the roof of a general household or the site of a factory. The solar power generation system has a function of connecting the generated power to a commercial system and causing a reverse power flow.

  Normally, once installed, the solar power generation system automatically reverses power to the commercial system during the time when sunlight is poured into the solar cell module, and at night time when the solar cell module does not receive sunlight. The belt is automatically disconnected from the commercial system.

  The solar cell module of the solar power generation system can normally continue to operate for more than 10 years.

  FIG. 14 shows a configuration example of such a photovoltaic power generation system. The DC power generated by the solar cell string 102 is converted into AC power by the inverter 104. The inverter 104 is connected to a commercial system 106 and a load (not shown) via a switch 105. A management device 107 for controlling the inverter 104 and the switch 105 is installed.

  In the solar power generation system of FIG. 14, the management device 107 activates the inverter 104 and closes the switch 105 when detecting that any of the solar cell strings 102 has started power generation.

  In addition, although the prior art about this invention was demonstrated based on the general technical information which the applicant acquired, the information which should be disclosed as prior art document information before filing in the range which an applicant memorize | stores The applicant does not have

  However, the above-described general photovoltaic power generation system has a problem that it is difficult to know an accurate power generation time. This will be described below.

  Since the solar cell string can continue to generate power for a long period of time, it is conceivable that the ownership right passes from the current user to another user.

  When ownership passes from the current user to another user, it is usually necessary to pay consideration. Power generation time is considered to be effective as one of the calculation criteria for the price.

  However, the current photovoltaic power generation system cannot record the power generation time of the solar cell string. This is especially true for solar cell modules.

  Furthermore, when recording the power generation time, it is expected that an illegal act of recording the power generation time is shorter than the actual time.

  Under such circumstances, it is difficult to buy and sell second-hand solar cell strings at an appropriate price.

  The present invention has been made in order to solve the above-described problems, and the object thereof is a solar power generation system capable of accurately knowing the power generation time of a solar cell string while avoiding the influence of fraud. The object is to provide a management device and a power generation monitoring device.

In order to achieve the above object, according to one aspect of the present invention, a photovoltaic power generation system includes a solar cell string having a plurality of solar cell modules, an inverter connected to the solar cell string, and an open / close connected to the inverter. A transmitter, a transmission device, and a management device. The inverter converts DC power generated by the solar cell string into AC power. The transmission device transmits power generation information to the management device . The power generation information is information indicating that the generated DC power value or voltage value exceeds a threshold value . The management device controls the inverter and the switch . The management device includes receiving means, identification information transmitting means, reply information receiving means, stop information receiving means, stop control means, and power generation time storage means . The receiving means receives power generation information from the transmission device. Identification information transmit means, when the receiving means receives the power information included in the received power information, and transmits the power generation module identification information for identifying a solar cell module that the power generation in the power generation monitoring device. Reply information receiving means receives a reply information indicating a reply to the transmission of the power generation module identification information from the power monitoring device. The stop information receiving means receives AC output stop information for stopping the output of AC power from the power generation monitoring device. Stop control means, if the time until receiving the transmission to either et Reply information generation module identification information to the power monitoring device from the power monitoring device exceeds a predetermined time, and the AC output stop information from the power monitoring device When received, a stop control signal for stopping the output of AC power is output to at least one of the inverter and the switch. The power generation time storage means adds a fixed time as the power generation usage time of the solar cell module each time the return information receiving means receives the return information from the power generation monitoring device without the stop control means outputting the stop control signal. Then, it is updated and stored in association with the power generation module identification information of the power generation module that is generating power.

In addition, the above-described transmission device includes power input means for inputting the generated DC power value or voltage value from any of the plurality of solar cell modules , storage means, detection means, and information transmission means. Is desirable. Storage means stores identification information of the power generation module that generates electric power is the power input means for inputting. The detection means detects whether the DC power value or voltage value input by the power input means exceeds a threshold value. Information transmitting means, while the DC power value or voltage value is input to the power input means exceeds a threshold value, and a benzalkonium be transmitted repeatedly generating information including identification information of the power generation module that generates electric power to the management apparatus desirable.

According to another aspect of the present invention, the management device is used in photovoltaic power generation system, a management apparatus that controls an inverter and switch. The solar power generation system includes a solar cell string having a plurality of solar cell modules, an inverter connected to the solar cell string, a switch connected to the inverter, a transmission device, and a management device. The inverter converts DC power generated by the solar cell string into AC power. The transmission device transmits power generation information. The power generation information indicates that the generated DC power value or voltage value exceeds a threshold value . Management apparatus includes a receiving unit, an identification information transmitting unit, and return information receiving means, and stop control means, and a power generation time storage means. The receiving means receives power generation information from the transmission device. Identification information transmit means, when the receiving means receives the power information included in the received power information, and transmits the power generation module identification information for identifying a solar cell module that the power generation in the power generation monitoring device. Reply information receiving means receives the reply information indicating a reply to the transmission of the power generation module identification information from the power monitoring device. The stop control means, when the time from when the power generation module identification information is transmitted to the power generation monitoring device until the return information is received from the power generation monitoring device exceeds a predetermined time, and when the AC output stop information is received from the power generation monitoring device in, a stop control signal for stopping the output of the AC power, to force out in respect of at least one inverter and switchgear. The power generation time storage means adds a fixed time as the power generation usage time of the solar cell module each time the return information receiving means receives the return information from the power generation monitoring device without the stop control means outputting the stop control signal. Then, it is updated and stored in association with the power generation module identification information of the power generation module that is generating power .

According to another aspect of the present invention, a power generation monitoring device includes a solar cell string having a plurality of solar cell modules, an inverter connected to the solar cell string and converting DC power generated by the solar cell string into AC power, A switch connected to the inverter; a management device that controls the inverter and the switch; and a transmission device that transmits power generation information indicating that the generated DC power value or voltage value exceeds a threshold to the management device. This is a power generation monitoring device used in a solar power generation system. The management device includes receiving means, identification information transmitting means, reply information receiving means, stop information receiving means, stop control means, and power generation time storage means. The receiving means receives power generation information from the transmitting device. When the reception unit receives the power generation information, the identification information transmission unit transmits the power generation module identification information that is included in the received power generation information and identifies the solar cell module that is generating power to the power generation monitoring device. The reply information receiving means receives reply information indicating a reply to the transmission of the power generation module identification information from the power generation monitoring device. The stop information receiving means receives AC output stop information for stopping the output of AC power from the power generation monitoring device. The stop control means, when the time from when the power generation module identification information is transmitted to the power generation monitoring device until the return information is received from the power generation monitoring device exceeds a predetermined time, and when the AC output stop information is received from the power generation monitoring device In addition, a stop control signal for stopping the output of the AC power is output to at least one of the inverter and the switch. The power generation time storage means adds a fixed time as the power generation usage time of the solar cell module each time the return information receiving means receives the return information from the power generation monitoring device without the stop control means outputting the stop control signal. Then, it is updated and stored in association with the power generation module identification information of the power generation module that is generating power. Power monitoring apparatus includes a Reply means, and signal generating means, and the signal counting means, and counting reset means, a count value over detecting means and a stop information transmitting means. Reply means receives the power generation module identification information transmitted from the management device, to send reply information to the management apparatus. Signal generating means generates a signal at a constant period. Signal counting means counts the number of signals that are signals generating means generates. The count reset means resets the count value by the signal number counting means when receiving the power generation module identification information transmitted from the management device. The count value over detecting means detects whether or not the count value by the signal number counting means exceeds a predetermined value. Stop information transmitting means, when the count value over detecting means has detected that exceeds a predetermined value, it sends AC output stop information to the management device.

  The solar power generation system, the management device, and the power generation monitoring device according to the present invention can accurately know the power generation time of the solar cell string without being affected by fraud.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

<First embodiment>
Hereinafter, the photovoltaic power generation system according to the first embodiment of the present invention will be described.

  FIG. 1 is a diagram showing a configuration of a photovoltaic power generation system according to the present embodiment. Referring to FIG. 1, the photovoltaic power generation system according to the present embodiment includes a plurality of solar cell strings 102, inverters 104, switches 105, and transmission devices connected to output terminals of solar cell strings 102. 304, a management device 307, a power generation monitoring server 309, and a communication device 310 are included. In this embodiment, “disconnection” means disconnection of a circuit.

  In the case of the present embodiment, the solar cell string 102 is configured by connecting eight single crystal silicon solar cell modules 110 in series. The inverter 104 converts the DC power output from each of the solar cell strings 102 into an effective power form (for example, AC power). The inverter 104 not only converts the DC power output from each of the solar cell strings 102 into an effective power form, but also maximizes the generated power of each solar cell string 102 by the maximum power point tracking control of the management device 307. . The switch 105 disconnects the connection point with the commercial system 106 (and consequently the load connected to the commercial system 106). In this embodiment, the switch 105 is a power relay. The management device 307 is equipped with a microcomputer. The transmission device 304 transmits a power signal. In the present embodiment, the power signal is a signal indicating whether or not the magnitude of the DC power generated by the solar cell string 102 exceeds a threshold value. The management device 307 manages the output of AC power converted by the inverter 104. The management device 307 has a function of communicating with the solar cell module 110, a function of transmitting a control signal for opening and closing to the switch 105, and a function of controlling the inverter 104. The power generation monitoring server 309 communicates with the communication device 310. Similarly to the management device 307, the power generation monitoring server 309 also includes a microcomputer. The communication device 310 relays communication between the management device 307 and the power generation monitoring server 309. The communication protocol is not particularly limited. For example, communication between the management device 307 and the communication device 310 may be performed according to the Internet protocol, and communication between the power generation monitoring server 309 and the communication device 310 may be performed according to Bluetooth (registered trademark).

  In this embodiment, the inverter 104, the switch 105, the management device 307, and the communication device 310 are included in one power conditioner.

  The power generation monitoring server 309 may be near the solar cell string 102 or may be in a remote place.

  In addition, an IC tag 212 is attached to each solar cell module 110. The IC tag 212 stores identification information for identifying the solar cell module 110. When the photovoltaic power generation system according to the present embodiment is installed, the IC tag 212 communicates with the management device 307, so that the identification information is transmitted to the management device 307. The management device 307 stores the received identification information in a memory card 240 described later. By referring to this information, the management device 307 can identify the solar cell module 110.

  FIG. 2 is a diagram illustrating a configuration of a microcomputer mounted on the management apparatus 307. Referring to FIG. 2, the microcomputer mounted on management device 307 includes a CPU (Central Processing Unit) 220, a RAM (Random Access Memory) 222, a ROM (Read Only Memory) 224, a keyboard 226, and a display 228. A memory driving device 230, a communication interface 232, an IC tag communication device 234, and an I / O (Input / Output) port 236.

  CPU220 performs a calculation. The CPU 220 is also a unit that controls each part of the microcomputer. The RAM 222 temporarily stores data used by the CPU 220. The ROM 224 stores a program executed by the CPU 220 and the like. The keyboard 226 is a device for the microcomputer administrator to input information by generating a signal corresponding to the operation of the microcomputer administrator. The display 228 is a device that displays information, which includes a liquid crystal panel or the like. The memory driving device 230 reads information and programs recorded on the memory card 240. The memory driving device 230 is also a device that records information on the memory card 240. The communication interface 232 communicates with the communication device 310. The IC tag communication device 234 receives the identification information transmitted by the IC tag 212. The I / O port 236 receives a signal indicating information and outputs a control signal.

  The I / O port 236 includes a plurality of input terminals 2362 and a plurality of output terminals 2364. The input terminal 2362 receives a power signal from the transmission device 304. One input terminal 2362 receives a power signal from only one transmission device 304. The output terminal 2364 outputs a control signal to the inverter 104 or the switch 105. One output terminal 2364 outputs a control signal only to one of the inverter 104 or the switch 105.

  In the present embodiment, the types of information recorded on the memory card 240 include total usage time data of the solar cell module 110 and identification information of the solar cell module 110. The memory card 240 records time data associated with the identification information of the solar cell module 110 as total usage time data of the solar cell module 110.

  FIG. 3 is a functional block diagram of the CPU 220 according to FIG. Referring to FIG. 3, the function of CPU 220 according to the present embodiment includes a transmission control unit 2202, an operation control unit 2204, and a stop control unit 2206.

  The transmission control unit 2202 controls the communication interface 232 to transmit identification information to the power generation monitoring server 309 when any of the input terminals 2362 receives a power signal. The transmitted identification information is the identification information corresponding to the input terminal 2362 that has received the power signal among the identification information stored in the memory card 240. When the voltage of the DC power output from the solar cell string 102 exceeds the threshold value, the operation control unit 2204 outputs a control signal for starting operation to the inverter 104, and outputs a control signal for closing the circuit to the switch 105. The I / O port 236 is controlled to output to When the period from the transmission of the identification information to the reception of the return information corresponding to the identification information exceeds the threshold value, the stop control unit 2206 outputs a control signal for stopping the output of the AC power from any of the output terminals 2364. The I / O port 236 is controlled as follows.

  FIG. 4 is a diagram illustrating a configuration of the transmission device 304. Referring to FIG. 4, transmission device 304 includes a voltage detection sensor 3042 and a signal transmission device 3044.

  The voltage detection sensor 3042 detects whether or not the magnitude of DC power output from the solar cell string 102 exceeds a threshold value. The signal transmission device 3044 transmits a power signal corresponding to the detection result by the voltage detection sensor 3042 to the management device 307. When the power signal indicates that the magnitude of the DC power output by the solar cell string 102 exceeds the threshold value, power generation information indicating that the magnitude of the DC power exceeds the threshold value is transmitted.

  FIG. 5 is a diagram illustrating a configuration of a microcomputer mounted on the power generation monitoring server 309. Referring to FIG. 5, the microcomputer mounted on power generation monitoring server 309 includes a CPU 220, a RAM 222, a ROM 224, a keyboard 226, a display 228, a memory driving device 230, a communication interface 232, and a wireless communication device 238. And an I / O port 236.

  In the case of the present embodiment, the wireless communication device 238 communicates with the communication device 310 wirelessly. The communication device 310 communicates with the management device 307. As a result, the power generation monitoring server 309 communicates indirectly with the management device 307.

  FIG. 6 is a functional block diagram of the CPU 220 according to FIG. Referring to FIG. 6, the function of CPU 220 according to the present embodiment includes a signal generation unit 2210, a counting unit 2212, and a transmission control unit 2214.

  The signal generator 2210 generates a signal at a constant period. The counter 2212 counts the number of signals generated by the signal generator 2210 while the communication interface 232 receives the identification information. The transmission control unit 2214 transmits the return information to the management device 307 when the number of signals counted by the counting unit 2212 is equal to or less than the threshold, and stops when the number of signals counted by the counting unit 2212 exceeds the threshold. The communication interface 232 is controlled to transmit information to the management device 307.

  FIG. 7 is a flowchart showing the update of the total usage time data executed by the management apparatus 307. FIG. 8 is a flowchart showing the reply of information executed by the power generation monitoring server 309. With reference to FIG. 7 and FIG. 8, operation | movement of a solar energy power generation system based on the above structures is demonstrated.

  As a result of the light hitting the solar cell string 102 and the solar cell module 110 starting power generation, if the voltage of the DC power output from the solar cell string 102 exceeds the threshold, the voltage detection sensor 3042 detects that fact. The signal transmission device 3044 transmits a power signal to the management device 307. The input terminal 2362 of the management device 307 receives the power signal. When the power signal is transmitted, the CPU 220 operating as the operation control unit 2204 detects that the solar cell module 110 has started power generation (step S250).

  When detecting that the power generation has started, the CPU 220 operating as the operation control unit 2204 causes the inverter 104 to start operation and causes the switch 105 to close the circuit. For this purpose, the operation control unit 2204 controls the I / O port 236 so as to output control signals to the inverter 104 and the switch 105 (step S252).

  When the inverter 104 starts operation and the switch 105 closes the circuit, the CPU 220 operating as the transmission control unit 2202 reads the identification information stored in the memory card 240 and transmits the identification information to the power generation monitoring server 309. The communication interface 232 is controlled as follows. The communication interface 232 transmits the identification information to the power generation monitoring server 309 via the communication device 310 (step S254). The transmitted identification information is identification information of the solar cell module 110 included in the solar cell string 102 during power generation. In the case of the present embodiment, the CPU 220 operating as the transmission control unit 2202 controls the communication interface 232 so as to transmit identification information at a constant cycle. The cycle is 1 minute.

  Meanwhile, the signal generation unit 2210 of the power generation monitoring server 309 generates a signal at a predetermined cycle. The counter 2212 counts the number of generated signals (step S270). While the number of signals is counted, the transmission control unit 2214 determines whether or not the communication interface 232 has received the identification information (step S272).

  If communication interface 232 has not yet received the identification information (NO in step S272), transmission control unit 2214 determines whether the number of signals counted by counting unit 2212 (the number of counters) has exceeded a threshold value. (Step S278). If the number of counters has not yet exceeded the threshold value (NO in step S278), the processes in step S270, step S272, and step S278 are repeated.

  Thereafter, since communication interface 232 receives the identification information (YES in step S272), counting unit 2212 resets the number of counters (step S274). When the number of counters is reset, the transmission control unit 2214 controls the communication interface 232 to send back reply information including the received identification information (step S276). The communication interface 232 returns reply information including the identification information.

  The reply information is returned to the communication interface 232 of the management apparatus 307 via the communication apparatus 310. The CPU 220 operating as the stop control unit 2206 is waiting for reply information (step S256).

  Further, the CPU 220 operating as the stop control unit 2206 determines whether or not there is an abnormality in communication based on whether or not reply information has been received (step S258). The CPU 220 operating as the stop control unit 2206 determines that there is an abnormality in communication based on the time detected by the built-in timer unless the return information is received for a certain period of time. The CPU 220 operating as the stop control unit 2206 determines that there is an abnormality in communication even when it receives stop information that is a signal to stop the operation of the inverter 104 instead of return information.

  In this case, since it is determined that there is no abnormality in communication (NO in step S258), CPU 220 and memory drive device 230 operating as operation control unit 2204 receive received reply information from the time data stored in memory card 240. The data corresponding to the identification information included in is updated (step S262). In the present embodiment, this update increases the time represented by the data by one minute. The increase of 1 minute is because the communication interface 232 transmits identification information every minute. If the communication interface 232 transmits identification information every two minutes, the time increased by this update is two minutes.

  Thereafter, when there is no light in the solar cell string 102 and the solar cell module 110 stops generating power, the power signal transmitted by the signal transmission device 3044 indicates that the voltage of the DC power output by the solar cell string 102 is less than or equal to the threshold value. As shown. When that happens, the CPU 220 operating as the transmission control unit 2202 controls the communication interface 232 so as to stop transmission of identification information to the power generation monitoring server 309. When the transmission of the identification information is stopped, the reply information is not returned.

  Meanwhile, the transmission control unit 2214 of the power generation monitoring server 309 determines whether or not the number of counters exceeds a threshold (step S278). Initially, since the number of counters has not yet exceeded the threshold value (NO in step S278), the processes in step S270, step S272, and step S278 are repeated.

  However, since the number of counters eventually exceeds the threshold value (YES in step S278), transmission control unit 2214 controls communication interface 232 so as to return stop information (step S280). The communication interface 232 transmits stop information.

  The stop information is returned to the communication interface 232 of the management device 307 via the communication device 310. The CPU 220 operating as the stop control unit 2206 determines that there is an abnormality in communication when the communication interface 232 receives the stop information.

  In this case (YES in step S258), CPU 220 operating as stop control unit 2206 controls I / O port 236 so as to output a control signal to inverter 104 and switch 105. The output control signals are a signal for stopping the operation of the inverter 104 and a signal for opening the circuit (step S260). Further, the time data stored in the memory card 240 is not updated.

  In addition, even when the communication between the management device 307 and the power generation monitoring server 309 is interrupted and the reply information is not returned, the CPU 220 operating as the stop control unit 2206 determines that the communication is abnormal. . Also in this case (YES in step S258), CPU 220 stops the operation of inverter 104 and causes switch 105 to open the circuit (step S260).

  As described above, the photovoltaic power generation system according to the present embodiment records the power generation time data of the photovoltaic power generation system. Moreover, when reply information is not returned or when stop information is received, the photovoltaic power generation system according to the present embodiment does not convert the generated DC power into AC power. As a result, AC power cannot be obtained if transmission of identification information is blocked or reception of reply information is blocked. If the communication is interrupted, AC power cannot be obtained, so that such interference is prevented. Since the interference is prevented, the memory card 240 records an accurate operation time. As a result, it is possible to provide a photovoltaic power generation system and a management device that can accurately know the power generation time of the solar cell string while avoiding the influence of fraudulent acts.

  Note that in step S262 according to the modification of the present embodiment, only one of the signal for stopping the operation of the inverter 104 and the signal for opening the circuit may be output.

<Second Embodiment>
Hereinafter, the solar power generation system according to the second embodiment of the present invention will be described.

  FIG. 9 is a diagram showing the configuration of the photovoltaic power generation system according to the present embodiment. Referring to FIG. 9, the photovoltaic power generation system according to the present embodiment is connected to each of a plurality of solar cell strings 102, inverters 104, switch 105, and solar cell module 110 included in solar cell strings 102. A transmission device 306, a management device 308, a power generation monitoring server 309, and a communication device 310.

  The transmission device 306 repeatedly transmits power generation information including identification information of the solar cell module 110 while the magnitude of the DC power generated by the solar cell module 110 exceeds the threshold value.

The management device 308 manages the output of AC power converted by the inverter 104.
FIG. 10 is a diagram illustrating a configuration of a microcomputer mounted on the management apparatus 308. Referring to FIG. 2, the microcomputer mounted on management device 308 includes CPU 220, RAM 222, ROM 224, keyboard 226, display 228, memory drive device 230, communication interface 232, and I / O port 236. And a wireless communication device 238.

  In the case of this embodiment, the wireless communication device 238 performs wireless communication with the transmission device 306. As a result, the power generation information is transmitted from the transmission device 306 to the management device 308.

  FIG. 11 is a functional block diagram of the CPU 220 according to FIG. Referring to FIG. 11, the function of CPU 220 according to the present embodiment includes a transmission control unit 2208, an operation control unit 2204, and a stop control unit 2206.

  When the wireless communication device 238 receives the power generation information from the transmission device 306, the transmission control unit 2208 controls the communication interface 232 to transmit the identification information to the power generation monitoring server 309. The transmitted identification information is identification information included in the power generation information.

  FIG. 12 is a diagram illustrating a configuration of the transmission device 306. Referring to FIG. 12, transmission apparatus 306 includes a power input unit 3062, an identification information storage unit 3064, and an information transmission unit 3066.

  The power input unit 3062 is a unit that receives DC power input by any of the solar cell modules 110 included in the solar cell string 102. The identification information storage unit 3064 stores identification information of the solar cell module 110 that inputs DC power among the solar cell modules 110 included in the solar cell string 102. The information transmission unit 3066 repeatedly transmits the power generation information wirelessly while the magnitude of the DC power input to the power input unit 3062 exceeds the threshold value. The power generation information includes the identification information stored in the identification information storage unit 3064.

  Other hardware configurations are the same as those in the first embodiment described above. The function about them is the same. Therefore, detailed description thereof will not be repeated here.

  FIG. 13 is a flowchart showing the update of the total usage time data executed by the management apparatus 308. With reference to FIG. 13 and FIG. 8, operation | movement of a solar energy power generation system based on the above structures is demonstrated. In the flowchart shown in FIG. 13, the same step numbers are assigned to the processes shown in FIG. These processes are the same. Therefore, detailed description thereof will not be repeated here.

  When light hits the solar cell string 102 and the solar cell module 110 starts power generation, the magnitude of the power increases. The power received by the power input unit 3062 also increases. As a result, when the magnitude of the power generated by the solar cell string 102 exceeds the threshold value, the power input unit 3062 can receive the power necessary for transmitting the identification information. When power necessary for transmitting the identification information is input, the information transmission unit 3066 reads the identification information from the identification information storage unit 3064, and repeatedly transmits the power generation information including the identification information to the management device 308. When the power generation information is transmitted, the management device 308 detects that the solar cell module 110 has started power generation (step S350).

  When it is detected that power generation is started, the CPU 220 operating as the transmission control unit 2208 transmits identification information to the power generation monitoring server 309 via the communication device 310 through the process of step S252 (step S354). The transmitted identification information is identification information included in the power information received by the wireless communication device 238. Thereby, the identification information of the solar cell module 110 during power generation is transmitted. In the case of the present embodiment, the management device 308 transmits identification information to the power generation monitoring server 309 at a constant cycle. The cycle is 1 minute.

  In the meantime, the power generation monitoring server 309 repeats the processes of step S270, step S272, and step S278, and waits for identification information.

  Thereafter, when receiving the identification information (YES in step S272), communication interface 232 of power generation monitoring server 309 returns the reply information including the identification information through the process of step S274 (step S276).

  The reply information is returned to the communication interface 232 of the management apparatus 308 via the communication apparatus 310. The CPU 220 operating as the stop control unit 2206 is waiting for reply information (step S256).

  Further, the CPU 220 operating as the stop control unit 2206 determines whether or not there is an abnormality in communication based on whether or not reply information has been received (step S258).

  In this case, since it is determined that there is no abnormality in communication (NO in step S258), CPU 220 and memory drive device 230 operating as operation control unit 2204 receive received reply information from the time data stored in memory card 240. The data corresponding to the identification information included in is updated (step S262).

  Thereafter, when there is no light in the solar cell string 102 and the solar cell module 110 stops generating power, sufficient power is not supplied to the transmission device 306. When sufficient power is not supplied, the transmission device 306 does not transmit power generation information. When transmission of power generation information is interrupted, the CPU 220 operating as the transmission control unit 2202 cannot transmit identification information to the power generation monitoring server 309. If the identification information cannot be transmitted, the reply information is not returned.

  In the meantime, the power generation monitoring server 309 repeats the processes of step S270, step S272, and step S278. However, since the number of counters eventually exceeds the threshold (YES in step S278), transmission control unit 2214 controls communication interface 232 so as to return stop information. The communication interface 232 of the power generation monitoring server 309 transmits stop information (step S280).

  The stop information is returned to the communication interface 232 of the management device 308 via the communication device 310. The CPU 220 of the management device 308 operating as the stop control unit 2206 determines that there is an abnormality in communication when the communication interface 232 receives the stop information.

  In this case (YES in step S258), CPU 220 operating as stop control unit 2206 stops the operation of inverter 104 and causes switch 105 to open the circuit (step S260).

  In addition, when the communication between the management device 308 and the power generation monitoring server 309 is interrupted, the reply information is not returned. The CPU 220 operating as the stop control unit 2206 determines that there is an abnormality in communication. Also in this case (YES in step S258), CPU 220 stops the operation of inverter 104 and causes switch 105 to open the circuit (step S260).

  As described above, the photovoltaic power generation system according to the present embodiment records the power generation time data of the photovoltaic power generation system for the solar cell module 110. Moreover, when reply information is not transmitted or stop information is received, the solar power generation system according to the present embodiment does not convert the generated DC power into AC power. As a result, AC power cannot be obtained if transmission of identification information is blocked or reception of reply information is blocked. If the communication is interrupted, AC power cannot be obtained, so that such interference is prevented. Since the interference is prevented, the memory card 240 records an accurate operation time. As a result, it is possible to provide a photovoltaic power generation system and a management device that can accurately know the power generation time of the solar cell string while avoiding the influence of fraudulent acts.

  Moreover, the solar power generation system which concerns on this Embodiment records the operation time of the solar cell module 110 corresponding to the identification information, when the reply information corresponding to the identification information which the transmitter 306 transmitted is received. Thereby, the operation time can be recorded for each solar cell module 110. Since the operation time can be recorded for each solar cell module 110, the value of the used solar cell string 102 can be appropriately evaluated even when a part of the solar cell module 110 included in the solar cell string 102 is replaced.

  In addition, the photovoltaic power generation system according to the present embodiment wirelessly communicates power generation information. When transmitting the power generation information by connecting the transmission device 306 to the solar cell module 110, the management device 308 receives many pieces of identification information of the solar cell module 110. Performing such reception by wired communication leads to an increase in installation cost and an increase in risk that information on power generation time is erroneously recorded. When the power generation information is wirelessly communicated, an increase in installation cost and such an increase in risk are avoided.

  Note that in step S262 according to the modification of the present embodiment, only one of the signal for stopping the operation of the inverter 104 and the signal for opening the circuit may be output.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a figure which shows the structure of the solar energy power generation system which concerns on the 1st Embodiment of this invention. It is a figure which shows the structure of the microcomputer mounted in the management apparatus which concerns on the 1st Embodiment of this invention. It is a functional block diagram of CPU of the management apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the structure of the transmitter which concerns on the 1st Embodiment of this invention. It is a figure which shows the structure of the microcomputer mounted in the electric power generation monitoring server which concerns on the 1st Embodiment of this invention. It is a functional block diagram of CPU of the electric power generation monitoring server which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the procedure of control of the update process of the data of the total use time which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the procedure of control of the reply process of the information which concerns on the 1st Embodiment of this invention. It is a figure which shows the structure of the solar energy power generation system which concerns on the 2nd Embodiment of this invention. It is a figure which shows the structure of the microcomputer mounted in the management apparatus which concerns on the 2nd Embodiment of this invention. It is a functional block diagram of CPU of the management apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows the structure of the transmitter which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows the procedure of control of the update process of the data of the total use time which concerns on the 2nd Embodiment of this invention. It is a figure which shows the structure of a general photovoltaic power generation system.

Explanation of symbols

  102 Solar cell string, 104 Inverter, 105 Switch, 106 Commercial system, 107,307,308 Management device, 110 Solar cell module, 212 IC tag, 220 CPU, 222 RAM, 224 ROM, 226 Keyboard, 228 Display, 230 Memory Drive device, 232 communication interface, 234 IC tag communication device, 236 I / O port, 238 wireless communication device, 240 memory card, 304,306 transmission device, 309 power generation monitoring server, 310 communication device, 2202, 2208, 2214 transmission control Unit, 2204 operation control unit, 2206 stop control unit, 2210 signal generation unit, 2212 counting unit, 2362 input terminal, 2364 output terminal, 3042 voltage detection sensor, 3044 signal transmission device, 30 2 power input unit, 3064 identification information storage unit, 3066 data transmission unit.

Claims (4)

A solar cell string having a plurality of solar cell modules;
An inverter connected to the solar cell string and converting DC power generated by the solar cell string into AC power;
A switch connected to the inverter;
A management device for controlling the inverter and the switch;
Look including a transmitting apparatus for transmitting power information indicating that the generated electric DC power or voltage value exceeds the threshold value to the management device,
The management device
Receiving means for receiving the power generation information from the transmitter;
When the receiving means receives the power generation information, identification information transmission means for transmitting to the power generation monitoring device power generation module identification information that is included in the received power generation information and identifies the solar cell module that is generating power,
A reply information receiving means for receiving return information indicating a reply to the transmission of the power generation module identification information from the power generation monitoring device,
AC output stop information for stopping output of the AC power, stop information receiving means for receiving from the power generation monitoring device,
When the time from when the power generation module identification information is transmitted to the power generation monitoring device until the return information is received from the power generation monitoring device exceeds a predetermined time, and when the AC output stop information is received from the power generation monitoring device when the stop control signal for stopping the output of the AC power, and because the stop control means you outputs and to at least one of said inverter and said switches,
Each time the return information receiving means receives the return information from the power generation monitoring device without the stop control means outputting the stop control signal, a certain time is added as the power generation usage time of the solar cell module. And a power generation time storage means that updates and stores the generated power generation module in association with the power generation module identification information . The transmitter is
A power input means for inputting a DC power or voltage value and previous SL generation from any one of said plurality of solar cell modules,
Storage means for storing identification information of the power generation module that the power generating said power input means for inputting,
Detecting means for detecting whether or not the DC power value or voltage value input by the power input means exceeds the threshold;
Information transmitting means for transmitting the power generation information including identification information of the power generation module that is generating power to the management device ;
Wherein the information transmitting means, while the DC power value or voltage value is input to the power input means exceeds the threshold value, that sends repeat the previous SL power generation information to the management apparatus, according to claim 1 Solar power system. A solar cell string having a plurality of solar cell modules, an inverter connected to the solar cell string and converting DC power generated by the solar cell string into AC power, a switch connected to the inverter, and the power generation a direct current power or voltage values are used in the photovoltaic power generation system including a transmitting apparatus for transmitting power information indicating that exceeds the threshold value, that control said switch and said inverter control apparatus ,
Receiving means for receiving the power generation information from the transmitter;
When the receiving means receives the power generation information, identification information transmission means for transmitting to the power generation monitoring device power generation module identification information that is included in the received power generation information and identifies the solar cell module that is generating power,
A reply information receiving means for receiving return information indicating a reply to the transmission of the power generation module identification information from the power generation monitoring device,
AC output stop information for stopping output of the AC power, stop information receiving means for receiving from the power generation monitoring device,
When the time from when the power generation module identification information is transmitted to the power generation monitoring device until the return information is received from the power generation monitoring device exceeds a predetermined time, and when the AC output stop information is received from the power generation monitoring device when the stop control signal for stopping the output of the AC power, and because the stop control means you outputs and to at least one of said inverter and said switches,
Each time the return information receiving means receives the return information from the power generation monitoring device without the stop control means outputting the stop control signal, a certain time is added as the power generation usage time of the solar cell module. And a power generation time storage unit that updates and stores the generated power generation module in association with the power generation module identification information . A solar cell string having a plurality of solar cell modules, an inverter connected to the solar cell string and converting DC power generated by the solar cell string into AC power, a switch connected to the inverter, and the inverter And a management device for controlling the switch, and a solar power generation system including a transmission device for transmitting power generation information indicating that the generated DC power value or voltage value exceeds a threshold to the management device A power generation monitoring device,
The management device
Receiving means for receiving the power generation information from the transmitter;
When the receiving means receives the power generation information, identification information transmitting means for transmitting to the power generation monitoring device power generation module identification information that is included in the received power generation information and identifies the solar cell module that is generating power. ,
Reply information receiving means for receiving from the power generation monitoring device return information indicating a reply to the transmission of the power generation module identification information;
AC output stop information for stopping output of the AC power, stop information receiving means for receiving from the power generation monitoring device,
When the time from when the power generation module identification information is transmitted to the power generation monitoring device until the return information is received from the power generation monitoring device exceeds a predetermined time, and when the AC output stop information is received from the power generation monitoring device when the stop control signal for stopping the output of the AC power, and because the stop control means you outputs and to at least one of said inverter and said switches,
Each time the return information receiving means receives the return information from the power generation monitoring device without the stop control means outputting the stop control signal, a certain time is added as the power generation usage time of the solar cell module. And a power generation time storage means for updating and storing in association with the power generation module identification information of the power generation module generating the power,
And returning means for receiving the power generation module identification information transmitted from the management apparatus transmits the reply information to the management device,
A signal generating means for generating a signal at a period of a constant,
Signal number counting means for counting the number of signals generated by the signal generating means;
Count reset means for resetting the count value by the signal number counting means when receiving the power generation module identification information transmitted from the management device;
Count value over detection means for detecting whether the count value by the signal number counting means exceeds a predetermined value;
Wherein when the count value over detecting means detects that exceeds the predetermined value, and a stop information transmitting means for transmitting said AC output stop information to the management apparatus, the power generation monitoring device.

Images