JP6696396B2 - Base unit and monitoring system - Google Patents

Description

  The present invention relates to a base unit and a monitoring system.

  In recent years, techniques for monitoring solar power generation systems have been developed. For example, Japanese Patent Laying-Open No. 2012-205078 (Patent Document 1) discloses the following solar power generation monitoring system. That is, the solar power generation monitoring system is a solar power generation monitoring system that monitors the power generation status of the solar cell panel, with respect to the solar power generation system that aggregates outputs from a plurality of solar cell panels and sends them to the power converter. There, provided in a place where the output electric paths from the plurality of solar cell panels are aggregated, a measuring device that measures the amount of power generation of each solar cell panel, and connected to the measuring device, the amount of power generated by the measuring device. Lower side communication device having a function of transmitting measurement data, upper side communication device having a function of receiving the measurement data transmitted from the lower side communication device, and the solar cell panel via the upper side communication device And a management device having a function of collecting the measurement data for each.

JP 2012-205078 A

  In the monitoring system for photovoltaic power generation described in Patent Document 1, measurement information may not be normally transmitted from the lower side communication device to the upper side communication device due to the communication environment such as the noise of the power line serving as the communication path and the wiring form. ..

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a master unit and a monitoring system that can more reliably transmit monitoring results of a plurality of solar cell panels. is there.

  (1) In order to solve the above problems, a master device according to an aspect of the present invention is a master device used in a monitoring system in a solar power generation system including a plurality of solar cell panels, and the monitoring system includes: Measurement information indicating a measurement result regarding the corresponding solar cell panel is provided with a plurality of slave units that transmit via a power line, and the master unit may collect the measurement results of the plurality of slave units in a predetermined cycle. A receiver is provided that receives the measurement information requested from the plurality of slaves, and a setting unit that sets a transmission operation of the measurement information by the slave, the setting unit being different for each slave. Set the content transmission operation.

  (5) In order to solve the above problems, a monitoring system according to an aspect of the present invention is a monitoring system used in a photovoltaic power generation system including a plurality of solar cell panels, and is a measurement related to the corresponding solar cell panel. Measurement information indicating the result, a plurality of slave units for transmitting via a power line, and a master unit for collecting the measurement results of the plurality of slave units, the master unit, the plurality of slave units in a predetermined cycle. Is required to collect the measurement results, the parent machine sets the operation of transmitting the measurement information by the child machine, and the parent machine sets the transmission operation of different contents for each child machine. ..

  (6) In order to solve the above problems, a monitoring system according to another aspect of the present invention is a monitoring system used in a photovoltaic power generation system including a plurality of solar cell panels, and relates to the corresponding solar cell panel. The measurement information indicating the measurement result, a plurality of slave units that transmit via a power line, and a master unit that collects the measurement results of the plurality of slave units, the master unit, the plurality of slaves in a predetermined cycle. Is required to collect the measurement results of the measurement device, the modulation method used by the slave device, the allowable number of retransmissions of the measurement information, the transmission timing of the measurement information, the transmission power of the measurement information, and the transmission of the measurement information At least one of the lengths of the periods is set to have different contents for each of the slaves.

  The present invention can be realized not only as a master unit including such a characteristic processing unit, but also as a method having the characteristic processing as steps, or for causing a computer to execute the steps of the characteristic processing. Can be realized as a program. Further, it can be realized as a semiconductor integrated circuit that realizes part or all of the parent device.

  Further, the present invention can be realized not only as a monitoring system including such a characteristic processing unit, but also as a method having such characteristic processing as steps, and executing the steps of such characteristic processing on a computer. It can be realized as a program for doing. Further, it can be realized as a semiconductor integrated circuit that realizes part or all of the monitoring system.

  ADVANTAGE OF THE INVENTION According to this invention, the monitoring result about several solar cell panels can be transmitted more reliably.

FIG. 1 is a diagram showing a configuration of a photovoltaic power generation system according to a first embodiment of the present invention. FIG. 2 is a diagram showing a configuration of the current collecting unit according to the first embodiment of the present invention. FIG. 3 is a diagram showing the configuration of the solar cell unit according to the first embodiment of the present invention. FIG. 4 is a diagram showing the configuration of the monitoring system according to the first embodiment of the present invention. FIG. 5: is a figure which shows the structure of the monitoring apparatus in the monitoring system which concerns on the 1st Embodiment of this invention. FIG. 6 is a diagram showing an example of a sequence of processing performed by the monitoring device at startup in the monitoring system according to the first embodiment of the present invention. FIG. 7: is a figure which shows the structure of the monitoring apparatus which concerns on the 1st Embodiment of this invention in detail. FIG. 8: is a figure which shows the structure of the collection apparatus in the monitoring system which concerns on the 1st Embodiment of this invention. FIG. 9 is a diagram showing an example of a setting information table stored in the storage unit of the collection device according to the first embodiment of the present invention. FIG. 10 is a diagram showing an example of the reception success / failure table held by the storage unit in the collection device according to the first embodiment of the present invention. FIG. 11 is a diagram showing the configuration of the monitoring system according to the second embodiment of the present invention. FIG. 12 is a diagram showing an example of a setting information table stored in the storage unit of the collection device according to the second embodiment of the present invention. FIG. 13 is a flowchart that defines an operation procedure when the collection device according to the second embodiment of the present invention processes measurement information. FIG. 14 is a flowchart that defines an operation procedure when the collection device according to the second embodiment of the present invention determines the transmission operation of the monitoring device and the relay device. FIG. 15 is a diagram showing an example of a setting content table used when the collecting apparatus according to the second embodiment of the present invention determines a transmission operation. FIG. 16 is a diagram showing an example of a setting content table used when the collection device according to the second embodiment of the present invention determines a transmission operation.

  First, the contents of the embodiments of the present invention will be listed and described.

  (1) A master device according to an embodiment of the present invention is a master device used in a monitoring system in a solar power generation system including a plurality of solar cell panels, and the monitoring system relates to the corresponding solar cell panels. Measurement information indicating a measurement result is provided with a plurality of slave units that transmit via a power line, the master unit is required to collect the measurement results of the plurality of slave units in a predetermined cycle, and the plurality of slave units A receiver that receives the measurement information from the device, and a setting unit that sets a transmission operation of the measurement information by the slave unit, and the setting unit sets the transmission operation with different contents for each slave unit. To do.

  With such a configuration, for example, the transmission operation of each slave unit can be set according to the success or failure of the reception of the measurement information from each slave unit, so that the slave unit with a low success rate of receiving the measurement information and It is possible to adjust the operation of transmitting the measurement information between the slave units having a high reception success rate. As a result, even when it is required to collect the measurement results of the slave unit in a predetermined cycle, the reception success rate of the slave unit with a low reception success rate is maintained while maintaining the reception success rate of the slave unit with a high reception success rate. Therefore, it is possible to improve the reception success rate of the measurement information from each child device as a whole. Therefore, the monitoring results of the plurality of solar cell panels can be transmitted more reliably.

  (2) Preferably, the setting unit further sets an operation of transmitting the measurement information by a relay device that relays the measurement information between the slave device and the master device via the power line.

  With such a configuration, for example, in the case where the success rate of receiving the measurement information relayed by the relay machine is low due to the poor transmission status of the measurement information between the relay machine and the master machine, the operation of transmitting the measurement information by the relay machine Can be set appropriately to improve the reception success rate.

  (3) Preferably, the setting unit performs, as the transmission operation of the slave unit, a modulation method used by the slave unit, an allowable number of retransmissions of the measurement information, a transmission timing of the measurement information, a transmission power of the measurement information, And, at least one of the lengths of the transmittable period of the measurement information is set.

  With such a configuration, it is possible to shorten the transmission time of the child device with a good reception status, increase the opportunity to send the measurement information to the child device with a poor reception status, or prevent the measurement information transmission period from overlapping. Increase the transmission power of the slave unit with poor reception status, or decrease the transmission opportunity of measurement information to the slave unit with good reception status to increase the transmission opportunity of slave unit with poor reception status. be able to. As a result, it is possible to prevent the transmission failure of the measurement information due to the interference between the slaves and to improve the success rate of receiving the measurement information.

  (4) More preferably, the setting unit uses, as the transmission operation of the relay, at least one of a modulation method used by the relay, an allowable number of retransmissions of the measurement information, and a transmission power of the measurement information. Set one.

  With such a configuration, for example, with respect to a relay device that relays measurement information from a child device having a poor reception status, it is possible to shorten the time required to relay the measurement information, increase the opportunity to transmit the measurement information, Since the transmission power of information can be increased, the success rate of receiving measurement information can be further improved.

  (5) A monitoring system according to an embodiment of the present invention is a monitoring system used in a photovoltaic power generation system including a plurality of solar cell panels, and provides measurement information indicating measurement results regarding the corresponding solar cell panels, It is provided with a plurality of slave units that transmit via power lines and a master unit that collects the measurement results of the plurality of slave units, and the master unit collects the measurement results of the plurality of slave units at a predetermined cycle. Is requested, the master sets the operation of transmitting the measurement information by the slave, and the master sets the transmit operation of different contents for each slave.

  With such a configuration, for example, the transmission operation of each slave unit can be set according to the success or failure of the reception of the measurement information from each slave unit, so that the slave unit with a low success rate of receiving the measurement information and It is possible to adjust the operation of transmitting the measurement information between the slave units having a high reception success rate. As a result, even when it is required to collect the measurement results of the slave unit in a predetermined cycle, the reception success rate of the slave unit with a low reception success rate is maintained while maintaining the reception success rate of the slave unit with a high reception success rate. Therefore, it is possible to improve the reception success rate of the measurement information from each child device as a whole. Therefore, the monitoring results of the plurality of solar cell panels can be transmitted more reliably.

  (6) A monitoring system according to an embodiment of the present invention is a monitoring system used in a photovoltaic power generation system including a plurality of solar cell panels, and provides measurement information indicating measurement results regarding the corresponding solar cell panels, It is provided with a plurality of slave units that transmit via power lines and a master unit that collects the measurement results of the plurality of slave units, and the master unit collects the measurement results of the plurality of slave units at a predetermined cycle. Is required, at least one of the modulation method used by the slave, the allowable number of retransmissions of the measurement information, the transmission timing of the measurement information, the transmission power of the measurement information, and the length of the transmittable period of the measurement information. Any one of them is set to have a different content for each child device.

  With such a configuration, for example, the transmission operation of each slave unit can be set according to the success or failure of the reception of the measurement information from each slave unit, so that the slave unit with a low success rate of receiving the measurement information and It is possible to adjust the operation of transmitting the measurement information between the slave units having a high reception success rate. Specifically, for example, it is possible to shorten the transmission time of slave units with good reception conditions, increase the chances of transmitting measurement information to slave units with poor reception conditions, and prevent overlapping of measurement information transmission periods. , Increase the transmission power of the slave unit with poor reception status, or decrease the transmission opportunity of measurement information for the slave unit with good reception status to increase the transmission opportunity of slave unit with poor reception status can do. As a result, even when it is required to collect the measurement results of the slave units at a predetermined cycle, the transmission failure of the measurement information due to the interference between the slave units while maintaining the reception success rate of the slave units having a high reception success rate. Since it is possible to prevent the above, or to improve the reception success rate of the slave unit having a low reception success rate, it is possible to improve the reception success rate of the measurement information from each slave unit as a whole. Therefore, the monitoring results of the plurality of solar cell panels can be transmitted more reliably.

  Embodiments of the present invention will be described below with reference to the drawings. It should be noted that the same or corresponding parts in the drawings are designated by the same reference numerals and the description thereof will not be repeated. Further, at least a part of the embodiments described below may be arbitrarily combined.

<First Embodiment>
[Configuration of photovoltaic power generation system 401]
FIG. 1 is a diagram showing a configuration of a photovoltaic power generation system according to a first embodiment of the present invention.

  With reference to FIG. 1, the solar power generation system 401 includes four power collection units 60 and a PCS 8. The PCS 8 includes a copper bar 7 and a power conversion unit 9.

  In FIG. 1, four current collecting units 60 are representatively shown, but more or less current collecting units 60 may be provided.

  FIG. 2 is a diagram showing a configuration of the current collecting unit according to the first embodiment of the present invention. Referring to FIG. 2, the current collecting unit 60 includes four solar cell units 75 and a copper bar 72.

  In FIG. 2, four solar cell units 75 are representatively shown, but more or fewer solar cell units 75 may be provided.

  FIG. 3 is a diagram showing the configuration of the solar cell unit according to the first embodiment of the present invention.

  Referring to FIG. 3, solar cell unit 75 includes four solar cell panels 78 and a copper bar 77.

  In FIG. 3, four solar cell panels 78 are representatively shown, but more or fewer solar cell panels 78 may be provided.

  In the solar power generation system 401, output lines, that is, power lines from the plurality of solar cell panels 78 are electrically connected to the PCS 8.

  More specifically, the output line 1 of the solar cell panel 78 has a first end connected to the solar cell panel 78 and a second end connected to the copper bar 77. Each output line 1 is integrated into the output line 5 via the copper bar 77. The copper bar 77 is provided inside the junction box 76, for example.

  When receiving the sunlight, the solar cell panel 78 converts the energy of the received sunlight into DC power and outputs the converted DC power to the output line 1. Here, the solar cell panel 78 is, for example, a string in which a plurality of solar cell panels are connected in series.

  2 and 3, output line 5 has a first end connected to copper bar 77 and a second end connected to copper bar 72 in corresponding solar cell unit 75. Each output line 5 is integrated into the output line 2 via the copper bar 72. The copper bar 72 is provided inside the current collection box 71, for example.

  Referring again to FIG. 1, in the photovoltaic power generation system 401, the output lines 1 from the plurality of solar cell panels 78 are aggregated into the output line 5 and the output lines 5 are aggregated into the output line 2 as described above. , Each output line 2 is electrically connected to PCS8 which is an example of a power converter device.

  More specifically, each output line 2 has a first end connected to the copper bar 72 in the corresponding current collecting unit 60 and a second end connected to the copper bar 7. In the PCS 8, the internal line 3 has a first end connected to the copper bar 7 and a second end connected to the power conversion unit 9.

  The PCS 8 is provided inside the container 6, for example. In the PCS 8, the power conversion unit 9 outputs, for example, the DC power generated in each solar cell panel 78 to the output line 1, the copper bar 77, the output line 5, the copper bar 72, the output line 2, the copper bar 7, and the internal line 3. When received via the via, it converts the received DC power into AC power and outputs it to the grid.

[Configuration of monitoring system 301]
FIG. 4 is a diagram showing the configuration of the monitoring system according to the first embodiment of the present invention.

  Referring to FIG. 4, the monitoring system 301 includes four monitoring devices 101 and a collection device 151.

  In FIG. 4, four monitoring devices 101 provided corresponding to one current collecting unit 60 are representatively shown, but more or a smaller number of monitoring devices 101 may be provided.

  The monitoring system 301 is used for the solar power generation system 401. In the monitoring system 301, sensor information in the monitoring device 101, which is a child device, is transmitted to the collecting device 151, which is a parent device, regularly or irregularly.

  The monitoring device 101 is provided in the current collection unit 60, for example. More specifically, four monitoring devices 101 are provided corresponding to the four solar cell units 75, respectively. Each monitoring device 101 is electrically connected to the corresponding output line 1 and output line 5, for example.

  The monitoring apparatus 101 measures the current of each output line 1 in the corresponding solar cell unit 75 with a sensor. The monitoring device 101 may be configured to measure the voltage of each output line 1 in the corresponding solar cell unit 75 with a sensor.

  The collection device 151 is provided, for example, near the PCS 8. More specifically, the collection device 151 is provided corresponding to the PCS 8 inside the container 6, for example, and is electrically connected to the copper bar 7 via the signal line 46. The collection device 151 may be provided outside the container 6.

  The monitoring device 101 and the collection device 151 perform power line communication (PLC: Power Line Communication) via the output lines 2 and 5 to transmit and receive information.

  More specifically, each monitoring device 101 transmits measurement information indicating the measurement result of the current or voltage of the corresponding output line. The collection device 151 collects the measurement result of each monitoring device 101.

  Hereinafter, the direction from the monitoring device 101 to the collecting device 151 is referred to as an upward direction, and the direction from the collecting device 151 to the monitoring device 101 is referred to as a downward direction.

[Configuration of Monitoring Device 101]
FIG. 5: is a figure which shows the structure of the monitoring apparatus in the monitoring system which concerns on the 1st Embodiment of this invention. In FIG. 5, output line 1, output line 5 and copper bar 77 are shown in more detail.

  Referring to FIG. 5, output line 1 includes a plus side output line 1p and a minus side output line 1n. The output line 5 includes a plus side output line 5p and a minus side output line 5n. The copper bar 77 includes a plus side copper bar 77p and a minus side copper bar 77n.

  Although not shown, the copper bar 72 in the collector box 71 shown in FIG. 2 includes a plus side copper bar 72p and a minus side copper bar 72n corresponding to the plus side output line 5p and the minus side output line 5n, respectively.

  The positive side output line 1p has a first end connected to the corresponding solar cell panel 78 and a second end connected to the positive side copper bar 77p. The negative side output line 1n has a first end connected to the corresponding solar cell panel 78 and a second end connected to the negative side copper bar 77n.

  The positive side output line 5p has a first end connected to the positive side copper bar 77p and a second end connected to the positive side copper bar 72p in the collector box 71. The negative side output line 5n has a first end connected to the negative side copper bar 77n and a second end connected to the negative side copper bar 72n in the current collection box 71.

  The monitoring device 101 includes a current detection unit 11, four sensors 16, and a communication unit 14. Note that the monitoring device 101 may include more or less sensors 16 depending on the number of output lines 1.

  The monitoring device 101 is provided, for example, near the solar cell panel 78. Specifically, the monitoring device 101 is provided, for example, inside a connection box 76 provided with a copper bar 77 to which the output line 1 to be measured is connected. The monitoring device 101 may be provided outside the connection box 76.

  The monitoring device 101 is electrically connected to, for example, the plus side output line 5p and the minus side output line 5n via the plus side power source line 26p and the minus side power source line 26n, respectively. Hereinafter, each of the plus side power source line 26p and the minus side power source line 26n is also referred to as a power source line 26.

  Monitoring device 101 operates, for example, using the electric power received from output line 5 via power supply line 26.

  Each monitoring device 101 transmits the measurement information indicating the measurement result regarding the corresponding solar cell panel 78 via itself and the power line connected to the collection device 151.

  FIG. 6 is a diagram showing an example of a sequence of processing performed by the monitoring device at startup in the monitoring system according to the first embodiment of the present invention.

  FIG. 7: is a figure which shows the structure of the monitoring apparatus which concerns on the 1st Embodiment of this invention in detail.

  With reference to FIG. 7, the monitoring device 101 includes a current detection unit 11, a processing unit 12, a counter 13, a communication unit 14, a storage unit 15, and four sensors 16.

  Referring to FIGS. 6 and 7, in monitoring device 101, for example, when solar cell panel 78 receives sunlight and starts power generation, power can be received from output line 5 through power supply line 26. It is activated (step S102).

  More specifically, the processing unit 12 in the monitoring apparatus 101 is activated when receiving power from a power supply circuit (not shown) of the monitoring apparatus 101, includes the ID of the own monitoring apparatus 101, and requests the setting information described below. Create a request for information.

  The processing unit 12 creates an information request packet in which the transmission source ID is the ID of the self monitoring apparatus 101, the transmission destination ID is the ID of the collection apparatus 151, and the data portion is the information request, and the created information request packet Is output to the communication unit 14.

  The communication unit 14 transmits the information request packet to the collection device 151 (step S104). The communication unit 14 can perform power line communication via the output line with the collection device 151 that collects the measurement results of the plurality of monitoring devices 101. More specifically, the communication unit 14 can send and receive information via the output lines 2 and 5. Specifically, the communication unit 14 performs power line communication with the collection device 151 via the power supply line 26 and the output lines 2 and 5.

  FIG. 8: is a figure which shows the structure of the collection apparatus in the monitoring system which concerns on the 1st Embodiment of this invention. In FIG. 8, the output line 2, the inner line 3 and the copper bar 7 are shown in more detail.

  Referring to FIG. 8, output line 2 includes a plus side output line 2p and a minus side output line 2n. The internal line 3 includes a plus side internal line 3p and a minus side internal line 3n. The copper bar 7 includes a plus side copper bar 7p and a minus side copper bar 7n.

  The positive side output line 2p has a first end connected to the positive side copper bar 72p in the current collection box 71 of the corresponding current collecting unit 60, and a second end connected to the positive side copper bar 7p. The negative side output line 2n has a first end connected to the negative side copper bar 72n and a second end connected to the negative side copper bar 7n in the current collection box 71 of the corresponding current collection unit 60.

  The positive side inner line 3p has a first end connected to the positive side copper bar 7p and a second end connected to the PCS 8. The negative side inner line 3n has a first end connected to the negative side copper bar 7n and a second end connected to the PCS 8.

  The collection device 151 includes a PLC communication unit (reception unit) 42, a processing unit (setting unit) 43, a LAN (Local Area Network) communication unit 44, a storage unit 45, and a counter 47.

  The collecting device 151 is used for the monitoring system 301 in the solar power generation system 401 including the plurality of solar cell panels 78.

  The collection device 151 is required to collect the measurement results of the plurality of monitoring devices 101 at a predetermined collection cycle. Here, the collection cycle is set to 60 seconds by the standard, for example.

  FIG. 9 is a diagram showing an example of a setting information table stored in the storage unit of the collection device according to the first embodiment of the present invention.

  With reference to FIGS. 6, 8 and 9, for example, the ID of the monitoring device 101 managed by its own collection device 151 is registered in the storage unit 45. Further, in the storage unit 45, setting information (hereinafter, also referred to as slave unit setting information) for setting the measurement information transmission operation by the monitoring apparatus 101 is registered for each monitoring apparatus 101, that is, for each ID. There is.

  The slave unit setting information includes, for example, transmission timing of measurement information, length of transmittable period of measurement information, allowable number of retransmissions of measurement information, modulation method, and transmission power of measurement information. included. The slave unit setting information is collected for each ID in the setting information table DST1 shown in FIG.

  In this example, the IDs of 30 monitoring devices 101 are registered in the setting information table DST1, and the default value of the slave device setting information is registered corresponding to each ID.

  More specifically, in order to collect the measurement information from 30 monitoring devices 101 within 60 seconds, for example, 2 seconds is registered as the default value of the length of the transmittable period.

  The default value of the transmission timing is registered so that the transmission timing difference between the monitoring devices 101 is 2 seconds so that the transmission enabled periods of the registered monitoring devices 101 do not overlap.

  For example, zero is registered as the default value of the allowable number of retransmissions. As the default value of the modulation method, for example, the normal transmission mode is registered. As the default value of the transmission output of the measurement information, for example, small output is registered. In this example, since the time required to transmit the measurement information is, for example, about 500 milliseconds, it is possible to register the allowable number of retransmissions of 3 times or less. It is also possible to register a high speed transmission mode as a modulation method. Further, it is possible to register a large output as the transmission output of the measurement information.

  The counter 47 counts clock pulses generated by, for example, an oscillation circuit using a crystal oscillator, and holds the counted value. This count value indicates, for example, the current time.

  The PLC communication unit 42 can perform power line communication with the monitoring device 101 via the output line.

  Specifically, the PLC communication unit 42 can send and receive information via the output lines 2 and 5. Specifically, the PLC communication unit 42 performs power line communication with the monitoring device 101 via the signal line 46 and the output lines 2 and 5.

  More specifically, the PLC communication unit 42 is electrically connected to the plus side copper bar 7p and the minus side copper bar 7n via the plus side signal line 46p and the minus side signal line 46n, which are the signal lines 46, respectively. .

  For example, the PLC communication unit 42 receives various packets from the plurality of monitoring devices 101 via the output lines 2 and 5, the copper bars 7 and 72, and the signal line 46.

  For example, when the PLC communication unit 42 receives the information request packet from the activated monitoring apparatus 101, the PLC communication unit 42 outputs the received information request packet to the processing unit 43.

  The processing unit 43 sets the operation of transmitting the measurement information by the monitoring device 101. In addition, the processing unit 43 sets a transmission operation having different contents for each monitoring device 101.

  Specifically, the processing unit 43, for example, as the transmission operation of the monitoring apparatus 101, the modulation method used by the monitoring apparatus 101, the allowable number of times of retransmission of measurement information, the transmission timing of measurement information, the transmission output of measurement information, and the transmission of measurement information. These are set such that at least one of the lengths of the transmittable periods differs for each monitoring device 101.

  More specifically, when the processing unit 43 receives the information request packet from the PLC communication unit 42, the processing unit 43 acquires the information request and the ID of the monitoring device 101 from the received information request packet, and sets the slave unit corresponding to the acquired ID. The information is acquired from the setting information table DST1 held in the storage unit 45.

  Further, the processing unit 43 acquires a count value from the counter 47 and creates time information indicating the acquired count value.

  In the processing unit 43, for example, the transmission source ID is the ID of the own collection device 151, the transmission destination ID is the ID of the monitoring device 101 that is the transmission source, and the data portion is the setting including the slave unit setting information and the time information. An information packet is created, and the created setting information packet is output to the PLC communication unit 42.

  The PLC communication unit 42 transmits the setting information packet received from the processing unit 43 to the monitoring device 101 of the transmission source via the signal line 46, the copper bar 7 and the output lines 2 and 5 (step S106).

  Referring to FIGS. 6 and 7, in monitoring system 301, at least one of the modulation method, the allowable number of retransmissions, the transmission timing, the transmission output, and the length of the transmittable period is set by the operation of collecting apparatus 151 as described above. One of them is set to have different contents for each monitoring device 101.

  Upon receiving the setting information packet from the collection device 151, the communication unit 14 of the monitoring device 101 outputs the received setting information packet to the processing unit 12.

  When the processing unit 12 receives the setting information packet from the communication unit 14, the processing unit 12 acquires the slave device setting information and the time information from the received setting information packet, and according to the contents of the acquired slave device setting information, the processing unit 12 of its own monitoring device 101. While setting the transmission operation, the slave unit setting information is stored in the storage unit 15 (step S108).

  Further, the processing unit 12 synchronizes the time with the collection device 151 by rewriting the count value in the counter 13 similar to the counter 47 shown in FIG. 8 to the count value indicated by the time information.

  The processing unit 12 creates measurement information indicating the measurement result of the current or voltage of the corresponding output line 1 in time for the transmission timing indicated by the slave device setting information. That is, the processing unit 12 creates measurement information indicating the measurement result of the sensor 16.

  More specifically, the processing unit 12 outputs the measurement command to the current detection unit 11 a predetermined time before the transmission timing indicated by the slave device setting information.

  The sensor 16 measures the current of the output line 1. More specifically, the sensor 16 is, for example, a Hall element type current probe. The sensor 16 measures the current flowing through the output line 1 to be measured, using the electric power received from the power supply circuit (not shown) of the monitoring device 101.

  More specifically, when the sensor 16 is supplied with power from the power supply circuit of the monitoring device 101, for example, the sensor 16 measures the current flowing through the corresponding negative output line 1n and sends a signal indicating the measurement result to the current detection unit 11. Output. The sensor 16 may measure the current flowing through the positive output line 1p.

  When receiving a measurement command from the processing unit 12, for example, the current detection unit 11 digitally outputs a signal obtained by performing signal processing such as averaging and filtering on each measurement signal received from each sensor 16 according to the received measurement command. The converted digital signal is output to the processing unit 12 as a response to the measurement command.

  The processing unit 12 creates measurement information in which the ID of the sensor 16 and the ID of the self monitoring device 101 corresponding to the measurement value indicated by the digital signal received from the current detecting unit 11 are added, and the transmission source ID is the self monitoring device. A measurement information packet having the ID of 101, the transmission destination ID of the collection device 151, and the data portion of the measurement information is created. Then, the processing unit 12 outputs the created measurement information packet to the communication unit 14. The processing unit 12 may include the sequence number in the measurement information packet.

  The communication unit 14 transmits the measurement information packet received from the processing unit 12 to the collection device 151.

  Referring again to FIG. 8, the PLC communication unit 42 in the collection device 151 receives the measurement information from the plurality of monitoring devices 101. More specifically, the PLC communication unit 42 receives, for example, the measurement information packets from the plurality of monitoring devices 101 via the output lines 5 and 2.

  The processing unit 43 acquires the measurement information indicating the measurement result of the current or voltage of the output line 1 from the measurement information packet from the monitoring device 101 received by the PLC communication unit 42. The processing unit 43 stores, for example, the acquired measurement information in the storage unit 45 in association with the ID of the monitoring device 101 included in the measurement information.

  The LAN communication unit 44 transmits / receives information to / from the terminal device 161 and the higher-level device 162 according to the Ethernet (registered trademark) standard, for example.

  The upper system device 162 is, for example, a cloud server, and periodically transmits a measurement information request to the collection device 151.

  For example, when the processing unit 43 receives a measurement information request from the higher-level device 162 via the LAN communication unit 44, the processing unit 43 acquires the measurement information stored in the storage unit 45 and the ID of the corresponding monitoring device 101, and transmits the measurement information request via the LAN communication unit 44. Is transmitted to the host device 162.

  FIG. 10 is a diagram showing an example of the reception success / failure table held by the storage unit in the collection device according to the first embodiment of the present invention.

  With reference to FIGS. 4, 8 and 10, the reception success / failure table RT1 indicates the reception status of the measurement information from each monitoring device 101 managed by the collection device 151. For example, the processing unit 43 writes the success / failure of reception of the measurement information packet from each monitoring device 101 managed by the own collection device 151 in the reception success / failure table RT1 for each collection cycle.

  The administrator of the monitoring system 301 performs, for example, an operation for browsing the contents of the reception success / failure table RT1 using a Web GUI (Graphical User Interface) or the like in order to confirm the reception status of the measurement status packet by the collection device 151. This is performed for the terminal device 161.

  The terminal device 161 transmits the table content request to the collection device 151 according to the operation by the administrator.

  When the processing unit 43 in the collection device 151 receives the table content request from the terminal device 161 via the LAN communication unit 44, the processing unit 43 acquires the reception success / failure table RT1 shown in FIG. The data format of the reception success / failure table RT1 is converted into a data format that can be displayed by the Web GUI.

  The processing unit 43 transmits the converted reception success / failure table RT1 to the terminal device 161 via the LAN communication unit 44. The processing unit 43 may periodically transmit the reception success / failure table RT1 to the terminal device 161 via the LAN communication unit 44.

  In the terminal device 161, the reception success / failure table RT1 transmitted from the collection device 151 is displayed on a Web browser or the like. The administrator views the reception success / failure table RT1 and recognizes that the reception status of the measurement information from the monitoring device 101 having the IDs of 2, 5 is poor.

  Since the reception success rate of the measurement information from the monitoring device 101 having the ID of 2 is about 50%, the administrator instructs the terminal device 161 to perform the operation of setting the maximum allowable number of retransmissions to three times. To do.

  Further, for example, since the reception success rate of the measurement information from the monitoring apparatus 101 having the ID of 5 is zero, the administrator transmits the modulation method of the monitoring apparatus 101 having the ID of 4 having a high reception success rate at high speed. The terminal device 161 is operated to switch to the mode and reduce the length of the transmittable period to less than 1 second.

  Further, the administrator sets the transmittable period length of the monitoring device 101 having the ID of 5 to be longer than 3 seconds by using the empty slot by shortening, and sets the allowable number of retransmissions larger than 5 times, and The terminal device 161 is operated to set the transmission output to the high output.

  When the terminal device 161 receives an operation by the administrator, the terminal device 161 creates operation information indicating the received operation content and transmits the created operation information to the collection device 151.

  Referring again to FIG. 8, when the processing unit 43 in the collection device 151 receives the operation information from the terminal device 161 via the LAN communication unit 44, the processing unit 43 stores the setting information table DST1 stored in the storage unit 45 according to the received operation information. Update.

  The processing unit 43 creates three setting information packets each including the slave unit setting information corresponding to the IDs 2, 4, and 5 in the updated setting information table DST1, and creates each setting information packet by 2, 4 , 5 to the monitoring device 101 having IDs via the PLC communication unit 42.

  As a result, the transmission operation of the monitoring device 101 having the IDs 2, 4, and 5 is changed according to the corresponding slave device setting information.

  In the monitoring system according to the first embodiment of the present invention, the collecting device 151 is configured to set the transmission operation of each monitoring device 101, but the configuration is not limited to this. For example, the configuration may be such that the administrator directly sets the transmission operation of each monitoring device 101. Specifically, when the administrator browses the reception success / failure table RT1 shown in FIG. 10 and recognizes the existence of the monitoring device 101 having a low reception success rate, the administrator directly operates the monitoring device 101 to directly detect the monitoring device 101. The transmission operation may be set.

  By the way, in the monitoring system for photovoltaic power generation described in Patent Document 1, when the measurement information cannot be normally transmitted from the lower side communication device to the upper side communication device due to the communication environment such as the noise of the power line which is the communication path and the wiring form. There is.

  More specifically, for example, a PCS 8 that generates noise is often provided near the higher-level communication device, that is, the collection device 151. In such a radio environment, the noise level in the vicinity of the collecting device 151 becomes high.

  For example, when the collecting device 151 transmits a signal including a packet to the lower communication device, that is, the monitoring device 101, the noise level is high and the signal level is high near the collecting device 151. Then, the noise level and the signal level are similarly attenuated according to the transmission distance from the collection device 151. For this reason, in the transmission of the signal in the downlink direction, the S / N ratio is generally maintained, so that the communication quality in the downlink direction is often good.

  On the other hand, when the monitoring device 101 transmits a signal including a packet to the collection device 151, the noise level is low and the signal level is high in the vicinity of the monitoring device 101. Then, while the signal level is attenuated according to the transmission distance from the monitoring device 101, the noise level becomes high in the vicinity of the collecting device 151, so that the S / N is deteriorated in the upstream signal transmission. Therefore, the communication quality in the upstream direction is often poor.

  That is, although downlink packets such as setting information packets are satisfactorily transmitted, it is difficult to transmit uplink packets such as measurement information packets.

  On the other hand, the collecting device according to the first embodiment of the present invention is used for the monitoring system 301 in the solar power generation system 401 including the plurality of solar cell panels 78. The monitoring system 301 includes a plurality of monitoring devices 101 that transmit measurement information indicating the measurement result of the corresponding solar cell panel 78 via the power line. The collection device 151 is required to collect the measurement results of the plurality of monitoring devices 101 at a predetermined collection cycle. The PLC communication unit 42 in the collection device 151 receives the measurement information from the plurality of monitoring devices 101. The processing unit 43 sets the operation of transmitting the measurement information by the monitoring device 101. Then, the processing unit 43 sets a transmission operation having different contents for each monitoring device 101.

  With such a configuration, for example, the transmission operation of each monitoring device 101 can be set according to the success or failure of the reception of the measurement information from each monitoring device 101, and thus the monitoring device having a low success rate of receiving the measurement information. It is possible to coordinate the operation of transmitting the measurement information between the monitoring device 101 and the monitoring device 101 having a high reception success rate. Accordingly, even when it is required to collect the measurement results of the monitoring apparatus 101 at a predetermined collection cycle, the monitoring apparatus having a low reception success rate while maintaining the reception success rate of the monitoring apparatus 101 having a high reception success rate. Since the reception success rate of 101 can be improved, the reception success rate of measurement information from each monitoring device 101 can be improved overall. Therefore, the monitoring results of the plurality of solar cell panels can be transmitted more reliably.

  Further, in the collecting apparatus according to the first embodiment of the present invention, the processing unit 43 uses the modulation method used by the monitoring apparatus 101, the allowable number of retransmissions of measurement information, and the transmission timing of measurement information as the transmission operation of the monitoring apparatus 101. , At least one of the transmission power of the measurement information and the length of the transmittable period of the measurement information is set.

  With such a configuration, the transmission time of the monitoring device 101 having a good reception status is shortened, the chances of transmitting the measurement information to the monitoring device 101 having a poor reception status are increased, and the overlapping of the transmission period of the measurement information is prevented. In other words, the monitoring device 101 having a poor reception condition may increase the transmission power, or the monitoring device 101 having a good reception condition may reduce the transmission opportunity of the measurement information to transmit the monitoring device 101 having a poor reception condition. Can be increased. As a result, it is possible to prevent the transmission failure of the measurement information due to the interference between the monitoring devices 101 and to improve the success rate of receiving the measurement information.

  In addition, the monitoring system according to the first embodiment of the present invention is used for a photovoltaic power generation system 401 including a plurality of solar cell panels 78. The plurality of monitoring devices 101 transmit measurement information indicating the measurement result regarding the corresponding solar cell panel 78 via the power line. The collection device 151 collects the measurement results of the plurality of monitoring devices 101. The collection device 151 is required to collect the measurement results of the plurality of monitoring devices 101 at a predetermined collection cycle. The collection device 151 sets the operation of transmitting the measurement information by the monitoring device 101. Then, the collection device 151 sets a transmission operation having different contents for each monitoring device 101.

  With such a configuration, for example, the transmission operation of each monitoring device 101 can be set according to the success or failure of the reception of the measurement information from each monitoring device 101, and thus the monitoring device having a low success rate of receiving the measurement information. It is possible to coordinate the operation of transmitting the measurement information between the monitoring device 101 and the monitoring device 101 having a high reception success rate. Accordingly, even when it is required to collect the measurement results of the monitoring apparatus 101 at a predetermined collection cycle, the monitoring apparatus having a low reception success rate while maintaining the reception success rate of the monitoring apparatus 101 having a high reception success rate. Since the reception success rate of 101 can be improved, the reception success rate of measurement information from each monitoring device 101 can be improved overall. Therefore, the monitoring results of the plurality of solar cell panels can be transmitted more reliably.

  In addition, the monitoring system according to the first embodiment of the present invention is used for a photovoltaic power generation system 401 including a plurality of solar cell panels 78. The plurality of monitoring devices 101 transmit measurement information indicating the measurement result regarding the corresponding solar cell panel 78 via the power line. The collection device 151 collects the measurement results of the plurality of monitoring devices 101. The collection device 151 is required to collect the measurement results of the plurality of monitoring devices 101 at a predetermined collection cycle. Then, at least one of the modulation method used by the monitoring apparatus 101, the allowable number of retransmissions of measurement information, the transmission timing of measurement information, the transmission power of measurement information, and the length of the transmittable period of measurement information is the monitoring apparatus 101. Different contents are set for each.

  With such a configuration, for example, the transmission operation of each monitoring device 101 can be set according to the success or failure of the reception of the measurement information from each monitoring device 101, and thus the monitoring device having a low success rate of receiving the measurement information. It is possible to coordinate the operation of transmitting the measurement information between the monitoring device 101 and the monitoring device 101 having a high reception success rate. Specifically, for example, it is possible to shorten the transmission time of the monitoring device 101 having a good reception condition, increase the opportunity of transmitting the measurement information to the monitoring device 101 having a poor reception condition, or to overlap the transmission period of the measurement information. To prevent the monitoring device 101 in the poor reception condition from increasing the transmission power, or to reduce the chance of transmitting the measurement information to the monitoring device 101 in the good reception condition to transmit the monitoring device 101 in the poor reception condition. You can increase opportunities. As a result, even when it is required to collect the measurement results of the monitoring apparatuses 101 at a predetermined collection cycle, interference between the monitoring apparatuses 101 is maintained while maintaining the reception success rate of the monitoring apparatuses 101 having a high reception success rate. Since it is possible to prevent the transmission failure of the measurement information and to improve the reception success rate of the monitoring apparatus 101 having a low reception success rate, it is possible to improve the reception success rate of the measurement information from each monitoring apparatus 101 as a whole. You can Therefore, the monitoring results of the plurality of solar cell panels can be transmitted more reliably.

  Next, another embodiment of the present invention will be described with reference to the drawings. It should be noted that the same or corresponding parts in the drawings are designated by the same reference numerals and the description thereof will not be repeated.

<Second Embodiment>
The present embodiment relates to a monitoring system including a repeater as compared with the monitoring system according to the first embodiment. Except for the contents described below, the monitoring system is the same as the monitoring system according to the first embodiment.

  FIG. 11 is a diagram showing the configuration of the monitoring system according to the second embodiment of the present invention. Referring to FIG. 11, monitoring system 302 further includes a repeater 171 as compared with monitoring system 301 shown in FIG.

  The repeater 171 may be provided corresponding to all the current collecting units 60 included in the monitoring system 302, or may be provided corresponding to a part of the current collecting units 60 included in the monitoring system 302.

  The relay device 171 relays information between the monitoring device 101 and the collection device 151 via an output line, for example. That is, the monitoring device 101 and the collection device 151 can perform power line communication with the relay device 171 via the output line.

  That is, the monitoring device 101 and the relay device 171 perform transmission and reception of information by performing power line communication via the output line 5. In addition, the collection device 151 and the relay device 171 perform transmission / reception of information by performing power line communication via the output line 2.

  More specifically, the communication unit 14 in the monitoring device 101 performs power line communication with the collection device 151 via the power supply line 26, the output lines 2 and 5, and the relay device 171.

  The PLC communication unit 42 in the collection device 151 performs power line communication with the monitoring device 101 via the signal line 46, the output lines 2 and 5, and the relay device 171.

  The relay device 171 relays the information request packet, the setting information packet, and the measurement information packet between the monitoring device 101 and the collection device 151 via the output line.

  Referring again to FIG. 8, in the collection device 151 in the monitoring system 302, the connection information indicating the connection relationship between the monitoring device 101 and the relay device 171 in the monitoring system 302 is stored in the storage unit 45.

  More specifically, the ID of the relay device 171 connected to the collecting device 151 is registered in the connection information, and the ID of the monitoring device 101 connected to the registered relay device 171 is the relay device. It is registered in association with the ID 171. These IDs are registered by the administrator, for example.

  FIG. 12 is a diagram showing an example of a setting information table stored in the storage unit of the collection device according to the second embodiment of the present invention.

  With reference to FIG. 12, the storage unit 45 stores, for example, the ID of the relay device 171 managed by the own collection device 151. Further, in the storage unit 45, setting information (hereinafter, also referred to as relay setting information) for setting the transmission operation of the measurement information by the relay 171 is registered for each relay 171 or each ID. There is.

  The repeater setting information includes, for example, the allowable number of retransmissions of measurement information, the modulation method, and the transmission output of measurement information. The repeater setting information is collected for each ID in the setting information table DST2 shown in FIG.

  In this example, the IDs of three repeaters 171 are registered in the setting information table DST2, and the default value of the repeater setting information is registered corresponding to each ID.

  More specifically, for example, zero is registered as the default value of the allowable number of retransmissions. For example, the normal transmission mode is registered as the default value of the modulation method. For example, a small output is registered as the default value of the transmission output of measurement information.

  The repeater 171 performs its own transmission operation setting process, similar to the transmission operation setting process in the monitoring apparatus 101. Specifically, the relay device 171 acquires the relay device setting information from the collection device 151 at the time of startup, and sets the measurement information transmission operation based on the acquired relay device setting information.

  Each device in the monitoring system 302 includes a computer, and an arithmetic processing unit such as a CPU in the computer reads out a program including some or all of the steps of the following flowchart from a memory (not shown) and executes the program. The programs of these plural devices can be installed from the outside. The programs of these plural devices are distributed in a state of being stored in a recording medium.

  FIG. 13 is a flowchart that defines an operation procedure when the collection device according to the second embodiment of the present invention processes measurement information.

  Referring to FIG. 13, in collection device 151 in monitoring system 302, processing for changing the transmission operation of monitoring device 101 and relay device 171 is automatically performed based on the reception status of measurement information.

  First, the collection device 151 waits until the measurement information packet is received or the collection of the measurement information from each monitoring device 101 managed by itself in each collection cycle (hereinafter, also referred to as unit collection) is completed ( (NO in step S202 and NO in step S204).

  Then, when receiving the measurement information packet (YES in step S202), the collection device 151 stores the measurement information included in the received measurement information packet (step S220).

  Next, the collection device 151 waits until a new measurement information packet is received or unit collection is completed (NO in step S202 and NO in step S204).

  When the unit collection is completed (YES in step S204), the collection device 151 records the success or failure of the reception of the measurement information packet in the unit collection in the reception success / failure table RT1 (step S206).

  Next, the collection device 151 confirms whether or not the measurement information has been received from the monitoring device 101 (hereinafter also referred to as the target monitoring device) whose transmission operation is to be changed (step S208).

  When confirming that the measurement information has been received from the target monitoring device (YES in step S208), the collecting device 151 deletes the target monitoring device from the reset table for recording the target monitoring device (step S222). ..

  Next, the collection device 151 confirms that the measurement information cannot be received from the target monitoring device (NO in step S208), or deletes the target monitoring device from the reset table (step S222), and the reception success / failure table. For example, referring to RT1, it is confirmed whether or not there is the monitoring apparatus 101 that has failed to receive the measurement information a predetermined number of times in succession (step S210).

  When the collection device 151 confirms that there is the monitoring device 101 that has failed to receive the measurement information a predetermined number of times consecutively (YES in step S210), the collection device 151 refers to the resetting table, and the confirmed monitoring device 101 becomes the resetting table. If not registered (NO in step S212), the confirmed monitoring device 101 is registered as a target monitoring device in the reset table, and the number of changes in the transmission operation of the target monitoring device is set to zero (step S226).

  Next, the collection apparatus 151 determines whether the confirmed monitoring apparatus 101 is registered in the reset table (YES in step S212) or registers the monitoring apparatus 101 in the reset table (step S226), Transmission operation is determined (step S214).

  Next, the collection device 151 creates the slave device setting information and the relay device setting information according to the determined transmission operation (step S216).

  Next, the collection device 151 transmits the created slave device setting information and relay device setting information to the target monitoring device and the corresponding relay device 171 (step S218).

  Next, the collection device 151 waits until it receives a measurement information packet or completes a new unit collection (NO in step S202 and NO in step S204).

  On the other hand, when the collection device 151 confirms that there is no monitoring device 101 that has failed to receive the measurement information continuously for a predetermined number of times (NO in step S210), it deletes all the target monitoring devices registered in the reset table. (Step S224).

  Next, the collection device 151 waits until it receives a measurement information packet or completes a new unit collection (NO in step S202 and NO in step S204).

  FIG. 14 is a flowchart that defines an operation procedure when the collection device according to the second embodiment of the present invention determines the transmission operation of the monitoring device and the relay device. FIG. 14 shows details of the operation in step S214 of FIG.

  15 and 16 are diagrams showing an example of a setting content table used when the collection device according to the second embodiment of the present invention determines a transmission operation.

  With reference to FIGS. 14 to 16, first, the processing unit 43 in the collection device 151 selects one target monitoring device registered in the reset table (step S300).

  Next, the processing unit 43 confirms, based on the connection information, whether or not the measurement information from the selected target monitoring device has been received via the relay device 171 (step S302).

  When the processing unit 43 confirms that the measurement information is received via the relay device 171 (YES in step S302), for example, the measurement information transmission operation by the relay device 171 and the measurement information transmission operation by the monitoring device 101 are set. (Step S304). More specifically, for example, as the transmission operation of the repeater 171, the processing unit 43 sets the allowable number of retransmissions of the measurement information, the modulation method used by the repeater 171 and the transmission output of the measurement information.

  Specifically, the processing unit 43 refers to the setting content table TT1 shown in FIG. 15 and acquires the transmission operation corresponding to the number of times the transmission operation of the target monitoring device has been changed. Then, the processing unit 43 creates the slave device setting information and the relay device setting information according to the acquired transmission operation.

  More specifically, when the number of changes in the transmission operation is less than or equal to 2, the processing unit 43 maintains the default values of the modulation method, the transmission output of the measurement information, and the length of the transmittable period, and the repeater The allowable number of retransmissions in any one of 171 and the monitoring apparatus 101 is changed.

  Since the time required to transmit the measurement information is approximately 500 milliseconds as described above, the maximum allowable number of retransmissions of the repeater 171 is 2. On the other hand, the time required for the measurement information from the monitoring device 101 to be received by the collection device 151 via the relay device 171 is approximately 1000 milliseconds, so the maximum allowable number of retransmissions of the monitoring device 101 is 1. ..

  When the number of changes in the transmission operation is 3 or 4, the processing unit 43 keeps the modulation scheme and the length of the transmittable period at default values, and increases the transmission output of the relay device 171 and the monitoring device 101, for example. The output is changed, and the allowable number of retransmissions in either the repeater 171 or the monitoring apparatus 101 is changed.

  When the number of changes in the transmission operation is 5 or 6, the processing unit 43 keeps the length of the transmittable period at the default value and sets the modulation method of one of the relay device 171 and the monitoring device 101. The transmission mode is changed to the high-speed transmission mode, the transmission output of the repeater 171 and the monitoring device 101 is changed to a high output, and the allowable number of retransmissions of either the repeater 171 or the monitoring device 101 is changed.

  Specifically, when the modulation method of the repeater 171 is set to the high-speed transmission mode, the maximum transmittable period of the monitoring apparatus 101 can be increased, so that the maximum transmittable period of the monitoring apparatus 101 can be ensured. It is possible. Further, when the modulation method of the monitoring apparatus 101 is set to the high-speed transmission mode, it is possible to secure a longer transmittable period of the repeater 171, so that it is possible to increase the maximum value of the allowable number of retransmissions of the repeater 171 to 3. Is.

  When the number of changes in the transmission operation is 7 to 9, the processing unit 43 extends the length of the transmittable period to 3 seconds and sets the modulation method of either the relay device 171 or the monitoring device 101 to the high-speed transmission mode. The transmission output of the repeater 171 and the monitoring device 101 is changed to a large output, and the allowable number of retransmissions in either the repeater 171 or the monitoring device 101 is changed.

  On the other hand, when the processing unit 43 confirms that the measurement information is directly received from the selected target monitoring device based on the connection information (NO in step S302), the processing unit 43 refers to the setting content table TT2 illustrated in FIG. Acquire the transmission operation corresponding to the number of changes of the transmission operation of the device. Then, the processing unit 43 creates slave unit setting information according to the acquired transmission operation.

  More specifically, when the number of changes in the transmission operation is 0 to 2 or less, the processing unit 43 sets the modulation method, the transmission output of the measurement information in the monitoring device 101, and the length of the transmittable period to the default values. It is maintained and the allowable number of retransmissions in the monitoring apparatus 101 is changed to 1 to 3 times.

  When the number of changes in the transmission operation is 3, the processing unit 43 maintains the modulation method and the length of the transmittable period at the default values, changes the transmission output of the measurement information to the large output, and the monitoring device 101 Change the allowable number of retransmissions to 3.

  When the number of changes in the transmission operation is 4 or 5, the processing unit 43 extends the length of the transmittable period to 3 seconds, changes the transmission output of the measurement information to a large output, and retransmits the monitoring device 101. Change the allowable number to 4 or 5 respectively.

  Next, when the processing unit 43 determines the communication operation according to the setting content table TT1 (step S304) or the communication operation according to the setting content table TT2 (step S308), the processing unit 43 increments the change number of the transmission operation (step S304). S306).

  Next, the processing unit 43 confirms whether or not all target monitoring devices registered in the reset table have been selected (step S310).

  When the processing unit 43 confirms that all the target monitoring devices registered in the reset table are not selected (NO in step S310), the target monitoring device is selected from the unselected target monitoring devices in the reset table. Is selected (step S300).

  On the other hand, when the processing unit 43 confirms that all the target monitoring devices registered in the resettable have been selected (YES in step S310), the processing of determining the transmission operation ends.

  In the collection device according to the second embodiment of the present invention, the processing unit 43 performs, as the transmission operation of the relay device 171, the allowable number of retransmissions of measurement information, the transmission output of measurement information, and the modulation used by the relay device 171. Although the configuration is such that the method is set, it is not limited to this. The processing unit 43 may be configured to set at least one of the allowable number of retransmissions, the transmission output, and the modulation scheme as the transmission operation of the repeater 171.

  As described above, in the collection device according to the second embodiment of the present invention, the processing unit 43 further performs the measurement by the relay device 171 that relays the measurement information between the monitoring device 101 and the collection device 151 via the power line. Set the information transmission operation.

  With such a configuration, for example, when the reception success rate of the measurement information relayed by the relay 171 is low because the transmission state of the measurement information between the relay 171 and the collection device 151 is not good, the measurement information by the relay 171 is low. By appropriately setting the transmission operation of, the reception success rate can be improved.

  Further, in the collecting apparatus according to the second embodiment of the present invention, the processing unit 43, as the transmission operation of the relay device 171, the modulation method used by the relay device 171, the allowable number of times of retransmission of measurement information, and the transmission of measurement information. At least one of the electric power is set.

  With such a configuration, for example, the time required for relaying the measurement information to the relay device 171 that relays the measurement information from the monitoring device 101 having a poor reception status can be shortened, or the opportunity to transmit the measurement information can be increased. Since the transmission power of the measurement information can be increased, the success rate of receiving the measurement information can be further improved.

  Since other configurations and operations are similar to those of the monitoring system according to the first embodiment, detailed description will not be repeated here.

  Note that it is possible to appropriately combine some or all of the constituent elements and operations of the respective devices according to the first and second embodiments of the present invention.

  It should be considered that the above-described embodiments are exemplifications in all respects and are not restrictive. The scope of the present invention is shown not by the above description but by the claims, and is intended to include meanings equivalent to the claims and all modifications within the scope.

  The above description includes the following additional features.

[Appendix 1]
A base unit used for a monitoring system in a solar power generation system including a plurality of solar cell panels,
The monitoring system includes a plurality of slave units that transmit measurement information indicating measurement results regarding the corresponding solar cell panels via a power line,
The master unit is required to collect the measurement results of the plurality of slave units in a predetermined cycle,
A receiving unit that receives the measurement information from the plurality of slaves,
A setting unit configured to set a transmission operation of the measurement information by the slave unit,
The setting unit sets the transmission operation having different contents for each of the slaves,
The slave unit is located in the vicinity of the corresponding solar cell panel, measures the current or voltage output from the corresponding solar cell panel, according to the setting information, the measurement information indicating the measurement result, self and Transmitting to the master unit via the power line connected to the master unit,
The master unit is located in the vicinity of a power converter that converts DC power generated by the plurality of solar cell panels into AC power,
The setting unit is a base unit that sets the transmission operation having different contents for each of the slaves based on a reception status of the measurement information from the plurality of slaves.

[Appendix 2]
A monitoring system used in a solar power generation system including a plurality of solar cell panels,
A plurality of slave units that transmit measurement information indicating the measurement results regarding the corresponding solar cell panel via a power line,
A master unit that collects the measurement results of the plurality of slave units,
The master unit is required to collect the measurement results of the plurality of slave units in a predetermined cycle,
The master unit sets the operation of transmitting the measurement information by the slave unit,
The parent device sets the transmission operation having different contents for each child device,
The slave unit is located in the vicinity of the corresponding solar cell panel, measures the current or voltage output from the corresponding solar cell panel, according to the setting information, the measurement information indicating the measurement result, self and Transmitting to the master unit via the power line connected to the master unit,
The master unit is located in the vicinity of a power converter that converts DC power generated by the plurality of solar cell panels into AC power,
The monitoring system, wherein the parent device sets the transmission operation having different contents for each of the child devices based on the reception status of the measurement information from the plurality of child devices.

[Appendix 3]
A monitoring system used in a solar power generation system including a plurality of solar cell panels,
A plurality of slave units that transmit measurement information indicating the measurement results regarding the corresponding solar cell panel via a power line,
A master unit that collects the measurement results of the plurality of slave units,
The master unit is required to collect the measurement results of the plurality of slave units in a predetermined cycle,
At least one of the modulation method used by the slave unit, the allowable number of retransmissions of the measurement information, the transmission timing of the measurement information, the transmission power of the measurement information, and the length of the transmittable period of the measurement information is the It is set to different contents for each cordless handset,
The slave unit is located in the vicinity of the corresponding solar cell panel, measures the current or voltage output from the corresponding solar cell panel, according to the setting information, the measurement information indicating the measurement result, self and Transmitting to the master unit via the power line connected to the master unit,
The said master unit is a monitoring system located in the vicinity of the power converter device which converts into the alternating current power the direct current power generated by the said several solar cell panel.

1,2,5 Output line 3 Internal line 6 Container 7 Copper bar 8 PCS
9 power converter 11 current detector 12 processor 13 counter 14 communication unit 15 storage unit 16 sensor 26 power supply line 42 PLC communication unit (reception unit)
43 Processing unit (setting unit)
44 LAN communication section 45 Storage section 46 Signal line 47 Counter 60 Current collecting unit 71 Current collecting box 72 Copper bar 75 Solar cell unit 76 Junction box 77 Copper bar 78 Solar cell panel 101 Monitoring device (slave unit)
151 Collection device (base unit)
161 Terminal device 162 Host device 171 Repeater 301,302 Monitoring system 401 Photovoltaic power generation system

Claims (3)

A base unit used for a monitoring system in a solar power generation system including a plurality of solar cell panels,
The monitoring system includes a plurality of slave units that transmit measurement information indicating measurement results regarding the corresponding solar cell panels via a power line,
The master unit is required to collect the measurement results of the plurality of slave units in a predetermined cycle,
A receiving unit that receives the measurement information from the plurality of slaves,
A setting unit configured to set a transmission operation of the measurement information by the slave unit,
The setting unit sets the transmission operation having different contents for each of the slaves ,
The setting unit further sets a transmission operation of the measurement information by a relay device that relays the measurement information between the slave device and the master device via the power line . The setting unit sets, as the transmission operation of the repeater, at least one of a modulation method used by the repeater, an allowable number of times of retransmission of the measurement information, and a transmission power of the measurement information. The base unit according to Item 1 . A monitoring system used in a solar power generation system including a plurality of solar cell panels,
A plurality of slave units that transmit measurement information indicating the measurement results regarding the corresponding solar cell panel via a power line,
A master unit that collects the measurement results of the plurality of slave units,
The master unit is required to collect the measurement results of the plurality of slave units in a predetermined cycle,
The master unit sets the operation of transmitting the measurement information by the slave unit,
The parent device sets the transmission operation having different contents for each child device ,
The monitoring system, wherein the master further sets an operation of transmitting the measurement information by a relay device that relays the measurement information between the slave and the master via the power line .

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