JP2010011388A - Photovoltaic generation system, communication apparatus, communication program, and method of controlling the photovoltaic generation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a photovoltaic generation system, a communication apparatus, a communication program and a method of controlling the photovoltaic generation system, for reducing the congestion in an administrative server when transmitting power generation state data for each of a plurality of photovoltaic generation devices to the administrative server. <P>SOLUTION: According to the communication apparatus 130, a transmission time decision section 130a decides a transmission time T<SB>T</SB>of power generation state data on the basis of a time at which measured output power of a photovoltaic generation device 100 becomes "0", and a time at which the output power becomes greater than "0". <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a solar power generation system, a communication device, a communication program used for the communication device, and a control method for the solar power generation system.

  Due to the recent increase in environmental awareness, there are an increasing number of cases where environmentally friendly solar power generation devices are provided in consumer homes and factories. Such a solar power generation device is widely used in various regions.

  Here, the photovoltaic power generation capable of acquiring aggregate data indicating the power generation status (for example, the current, voltage, power, solar radiation amount, etc. of the photovoltaic power generation device) in each of a plurality of photovoltaic power generation devices such as houses and factories by the management server The use of the system is under consideration. By using such aggregated data, for example, a service that informs each customer of the power generation status of each photovoltaic power generation device, or an added value related to the environmental value of the power generated by each photovoltaic power generation device (so-called “green” Electricity ") can be used.

  In such a photovoltaic power generation system, a communication device connected to each photovoltaic power generation device has at least one of current, voltage, power, and solar radiation amount data regarding the power generation status of each photovoltaic power generation device. , And transmitted to the management server every predetermined period (for example, 5 minutes). Each communication device is connected to each photovoltaic power generation device and is connected to a management server via a communication line. The management server acquires aggregated data for each photovoltaic power generation device by synthesizing the power generation status data received from each communication device in chronological order.

  However, if power generation status data is transmitted from each communication device to the management server at a predetermined interval, congestion occurs on the management server side, and the management server side communication line capacity or server processing capacity is exceeded. A normal response may not be returned from the server to each communication device. In this case, each communication device repeatedly retransmits the power generation status data every predetermined period (for example, 1 minute) until a normal response is returned from the management server. As a result, the retransmission from each communication device may cause congestion on the management server side again.

Here, since the content providing device is congested with the content providing request from each communication device, and as a result, it is not possible to respond to the request, each communication device receives an error message received from the content providing device, There has been proposed a method of changing a period during which a content provision request is retransmitted so that congestion does not occur (see Patent Document 1). According to this method, it is possible to reduce the occurrence of congestion again on the content providing apparatus side.
JP 2005-18727 A

  However, in the technique described in Patent Document 1, when the first content provision request before the retransmission from each communication device is transmitted to the content providing device, the occurrence of congestion on the content providing device side is avoided. I can't do it. Therefore, if the method described in Patent Document 1 is applied to the solar power generation system, there is a possibility that congestion occurs on the management server side when power generation status data is transmitted from each communication device to the management server. Therefore, there is room for reducing the occurrence of congestion on the management server side.

  Therefore, the present invention has been made in view of the above-described situation, and when transmitting the power generation status data of each of the plurality of solar power generation devices to the management server, the solar that can reduce the occurrence of congestion on the management server side. An object is to provide a photovoltaic power generation system, a communication device, a communication program, and a control method for a photovoltaic power generation system.

  A photovoltaic power generation system according to one aspect of the present invention includes a plurality of photovoltaic power generation apparatuses, a plurality of communication apparatuses connected to each of the plurality of photovoltaic power generation apparatuses, and a plurality of communication apparatuses via communication lines. A plurality of communication devices each including at least one of current, voltage, power, and amount of solar radiation regarding a power generation status of each of the plurality of solar power generation devices within a predetermined period. A power generation status data acquisition unit that acquires power generation status data, a transmission unit that transmits power generation status data to the management server via a communication line, and a transmission time that is a time for transmitting the power generation status data to the management server A transmission time determination unit, wherein the transmission time determination unit includes a first time when the power generation status data of each of the plurality of photovoltaic power generation devices is equal to or less than a first predetermined value, and a plurality of The power generation status data of each sunlight power generation apparatus based on at least one of the time of the second time is larger than the second predetermined value, and summarized in that determining the transmission time.

  According to the photovoltaic power generation system according to one feature of the present invention, utilizing the variation that occurs at the first time or the second time according to the difference between the longitude and latitude of the installation location of each photovoltaic power generation device, Access to the management server can be distributed. As a result, the occurrence of congestion on the management server side that receives the power generation status data can be reduced.

  In the solar power generation system according to one aspect of the present invention, at least one of the first predetermined value or the second predetermined value indicates that the power generation status data of each of the plurality of solar power generation devices is substantially zero. It may be a value.

  In the photovoltaic power generation system according to one aspect of the present invention, the transmission time determination unit may determine the transmission time based on a difference between the first time or the second time and a predetermined reference time. .

  In the solar power generation system according to one aspect of the present invention, the transmission time may be from the first time to the second time.

  In the photovoltaic power generation system according to one aspect of the present invention, the transmission time determination unit may update the determined transmission time based on information unique to an area where each of the plurality of photovoltaic power generation devices is provided. .

  In the photovoltaic power generation system according to one aspect of the present invention, the transmission time determination unit may set the most characteristic time among the one time detected in the past as the one time of the current time.

  A communication device according to one aspect of the present invention is connected to a solar power generation device, and generates power generation status data that is at least one of current, voltage, power, and amount of solar radiation regarding a power generation status of the solar power generation device to a management server. A communication device that transmits via a communication line, a power generation status data acquisition unit that acquires power generation status data, a transmission unit that transmits power generation status data to the management server, and a time at which the power generation status data is transmitted to the management server A transmission time determination unit that determines a certain transmission time, and the transmission time determination unit includes a first time when the power generation status data of the solar power generation device is equal to or lower than a first predetermined value, and the power generation status data of the solar power generation device. The gist is to determine the transmission time based on at least one of the second times that is greater than the second predetermined value.

  A communication program according to one aspect of the present invention is connected to a photovoltaic power generation apparatus, and generates power generation status data that is at least one of current, voltage, power, and solar radiation amount regarding the power generation status of the photovoltaic power generation apparatus to a management server. A step of acquiring power generation status data in a computer functioning as a communication device that transmits via a communication line, a first time when the power generation status data of the solar power generation device is equal to or lower than a first predetermined value, and the solar power generation device Determining a transmission time, which is a time for transmitting the power generation status data to the management server, based on at least one of the second times when the power generation status data of the power generation is greater than the second predetermined value; and the power generation status to the management server The gist is to execute the step C of transmitting data at a transmission time.

  A control method according to one aspect of the present invention includes a plurality of photovoltaic power generation apparatuses, a plurality of communication apparatuses connected to each of the plurality of photovoltaic power generation apparatuses, and a plurality of communication apparatuses connected via communication lines. A plurality of communication devices, each of which is at least one of current, voltage, power, and amount of solar radiation related to the power generation status of each of the plurality of solar power generation devices. Step A for acquiring power generation status data, each of the plurality of communication devices, a first time when the power generation status data of each of the plurality of solar power generation devices is equal to or less than a first predetermined value, and power generation of each of the plurality of solar power generation devices Determining a transmission time, which is a time for transmitting the power generation status data to the management server, based on at least one of the second times when the status data is greater than the second predetermined value; Each of the plurality of communication devices, and summarized in that and a step C of transmitting the power status data via the communication line to the management server.

  According to the present invention, when transmitting power generation status data of each of a plurality of photovoltaic power generation apparatuses to the management server, the photovoltaic power generation system, the communication apparatus, and the communication apparatus that can reduce the occurrence of congestion on the management server side are provided. It is possible to provide a communication program to be used and a control method for the photovoltaic power generation system.

  Next, an embodiment of the present invention will be described with reference to the drawings. In the description of the drawings in the following embodiments, the same or similar parts are denoted by the same or similar reference numerals.

[First Embodiment]
In the present embodiment, (1) a schematic configuration of the photovoltaic power generation system, (2) a detailed configuration of the communication device, (3) an operation of the communication device, and (4) an operation / effect will be described.

(1) Schematic Configuration of Solar Power Generation System A schematic configuration of the solar power generation system according to the first embodiment will be described below with reference to the drawings. FIG. 1 is a schematic diagram illustrating a configuration of a photovoltaic power generation system according to the first embodiment.

  As shown in FIG. 1, the photovoltaic power generation system includes a plurality of customers 10 (customers 10 </ b> A to 10 </ b> X), a network 20, and a management server 30.

  Each customer 10 is distributed and located in a wide area with different longitude and latitude. Therefore, the sunrise and sunset times are different for each customer 10. Each consumer 10 includes a solar power generation device 100, a power conditioner 110, a power meter 120, a communication device 130, a distribution board 140, and a load 150.

  The solar power generation device 100 outputs direct-current power by receiving sunlight in a time period from sunrise to sunset. Here, since the time of sunrise and sunset is different for each customer 10, it should be noted that the output time zone in which the photovoltaic power generation apparatus 100 outputs DC power differs between the customer 10A and the customer 10X. . The output time zone also depends on the installation environment of the photovoltaic power generation apparatus 100, the altitude of the installation location, and the like. However, an object of the present invention is to distribute the transmission time in each communication device 130, as will be described later, and not to accurately calculate the sunrise and sunset times. Therefore, in the following description, the output time zone is determined by longitude and latitude for the sake of simplicity.

  The wattmeter 120 measures the AC power output from the power conditioner 110 in real time. That is, the wattmeter 120 can indirectly measure the output power of the solar power generation device 100 in real time.

  The power conditioner 110 has a function of converting DC power output from the solar power generation device 100 into AC power. The power conditioner 110 is driven when the DC power output from the photovoltaic power generation apparatus 100 is larger than a predetermined value. Therefore, when the DC power output from the solar power generation device 100 is smaller than the predetermined value, AC power is not output from the power conditioner 110. As described above, when measuring the AC power output from the power conditioner 110, the AC power is not output from the power conditioner 110 even if a minute DC power is output from the photovoltaic power generation apparatus 100. In the following description, when AC power is not output from the power conditioner 110, the output power of the photovoltaic power generation apparatus 100 is substantially 0, so that it is simply described as “0”.

  The communication device 130 is connected to the wattmeter 120 and acquires and stores power generation status data regarding the power generation status of the solar power generation device 100. The communication device 130 determines a transmission time that is a time for transmitting the power generation status data by a method described later. The communication device 130 transmits the power generation status data to the management server 30 at the determined transmission time. In the first embodiment, the communication device 130 transmits the power generation status data once in a predetermined period. The function of the communication device 130 will be described later. In the present embodiment, since the communication device 130 transmits the power generation status data once a day, the predetermined period is approximately 24 hours.

  Here, the power generation status data is at least one of current, voltage, power, and amount of solar radiation related to the power generation status of the photovoltaic power generation apparatus 100. Specifically, the power generation status data includes the direct current flowing from the solar power generation device 100, the voltage of the solar power generation device 100, the output power of the solar power generation device 100, the transition of the amount of solar radiation, or the solar power generation device. The output power of 100, the integrated amount of solar radiation amount, and the like. The solar radiation amount is the amount of radiant energy received from the sun per unit time in the unit area of the solar power generation device 100. The solar radiation amount is measured by converting the solar radiation amount into an electrical signal using a photoelectric element or the like. Is common. Here, in this embodiment, transition data of output power of the solar power generation device 100 will be described as an example of power generation status data.

  Distribution board 140 is connected to the power system via power transmission line 35. The distribution board 140 supplies tidal power transmitted through the power transmission line 35 to the load 150. The distribution board 140 supplies the output power of the solar power generation device 100 to the load 150. The distribution board 140 can transmit the output power of the photovoltaic power generation apparatus 100 to the transmission line 35 as reverse power flow power.

  The load 150 is tidal power transmitted through the power transmission line 35 or home appliances that operate while consuming the output power of the solar power generation device 100.

  The network 20 is a mobile phone network, an 802.11x-compliant wireless LAN network, the Internet, or the like. The network 20 is connected to a plurality of communication devices 130 via the connection line 15. The network 20 is connected to the management server 30 via the connection line 25. Here, it should be noted that the connection line 15, the network 20, and the connection line 25 constitute a communication line that connects the plurality of communication devices 130 and the management server 30. Each of the solar power generation devices 100 is connected to the communication device 130 via the power conditioner 110 and the wattmeter 120.

  The management server 30 receives the power generation status data from each of the plurality of communication devices 130 every predetermined period (approximately 24 hours). The management server 30 acquires aggregated data that continuously indicates the transition of the output power of each solar power generation device 100 by connecting the power generation status data received from each communication device 130 in time series order. Such aggregated data is used for feedback to each consumer and for use as output power of each photovoltaic power generation apparatus 100 as green power.

(2) Detailed Configuration of Communication Device Next, a detailed configuration of the communication device 130 will be described with reference to the drawings. FIG. 2 is a functional block configuration diagram of the communication device 130 according to the first embodiment. As illustrated in FIG. 2, the communication device 130 includes a memory 131, a power generation status data acquisition unit 132, a power generation start time determination unit 133, a power generation end time determination unit 134, a reference time / dispersion width calculation unit 135, and a transmission time calculation unit 136. And a transmission unit 137.

  Here, the power generation start time determination unit 133, the power generation end time determination unit 134, the reference time / dispersion width calculation unit 135, and the transmission time calculation unit 136 constitute a transmission time determination unit 130a according to the present embodiment. The transmission time determination unit 130a has a first time when the output power of the photovoltaic power generation apparatus 100 measured by the wattmeter 120 is equal to or less than a first predetermined value (≈0), and the output power is a second predetermined value (≈0). ) Based on the larger second time, the transmission time for transmitting the power generation status data to the management server 30 is determined. That is, the transmission time determination unit 130a sets a threshold value corresponding to the output power (power generation status data) and compares the threshold value with that.

  The memory 131 stores the output power of the solar power generation device 100 measured in real time by the power meter 120. The output power stored in the memory 131 is erased after the power generation status data is transmitted by the transmission unit 137.

  The power generation status data acquisition unit 132 acquires power generation status data indicating the transition of the output power of the solar power generation device 100 within a predetermined period (approximately 24 hours). FIG. 3 is a schematic diagram illustrating an example of power generation status data. The power generation status data transmitted this time is temporally continuous with the power transmission status data transmitted last time. The power generation status data may be a list of numerical data, a waveform diagram, or the like.

The power generation start time determination unit 133 determines a power generation start time that is a time at which power generation by the solar power generation device 100 is started. Specifically, the power generation start time determination unit 133 detects the time when the value of the output power currently stored in the memory 131 is greater than “0” as the temporary power generation start time T _S1 . The predetermined value determined that the output power at this time is substantially larger than 0 is the second predetermined value, and T _S1 is the second time. The power generation start time determination unit 133 stores the temporary power generation start time T _S0 having the earliest time among the temporary power generation start times T _S1 detected up to the previous transmission process. The power generation start time determination unit 133 determines the earlier one of the stored temporary power generation start time T _S0 and the temporary power generation start time T _S1 detected this time as the power generation start time T _S2 .

FIG. 3 shows a case where the stored temporary power generation start time T _S0 is earlier than the temporary power generation start time T _S1 detected this time. The temporary power generation start time T _S0 is generally the earliest time on the day of “summer solstice”, and from that day onward, the temporary power generation start time T _S0 set on that day becomes the power generation start time T _S2 . As described above, the power generation start time determination unit 133 sets the most characteristic time among the temporary power generation start times T _S0 detected in the past as the power generation start time T _S2 .

The power generation end time determination unit 134 determines a power generation end time that is a time when power generation by the solar power generation device 100 ends. Specifically, the power generation end time determination unit 134 detects the time when the value of the output power currently stored in the memory 131 becomes “0” as the provisional power generation end time T _E1 . The predetermined value determined that the output power at this time has become substantially zero is the first predetermined value, and T _E1 is the first time. The power generation end time determination unit 134 stores the temporary power generation end time T _E0 having the _latest time among the temporary power generation end times T _E1 detected up to the previous transmission process. The power generation end time determination unit 134 determines the later one of the stored temporary power generation end time T _E0 and the temporary power generation end time T _E1 detected this time as the power generation end time T _E2 .

FIG. 3 shows a case where the stored temporary power generation end time T _E0 is earlier than the temporary power generation end time T _E1 detected this time. The temporary power generation end time T _E0 is generally the latest time on the day of “summer solstice”, and from that date onward, the temporary power generation end time T _E0 detected on that day becomes the power generation end time T _E2 . As described above, the power generation end time determination unit 134 sets the most characteristic time among the provisional power generation end times T _E0 detected in the past as the power generation end time T _E2 .

The reference time / dispersion width calculation unit 135 calculates a time period from the power generation end time T _E2 to the power generation start time T _S2 as the transmission dispersion width W ₂ . Transmission time each communication device 130 is a time to transmit the power status data is distributed in a time zone of the transmission dispersion width W _2. Further, the reference time / dispersion width calculation unit 135 sets an intermediate time between the power generation end time T _E2 and the power generation start time T _S2 as the transmission reference time _TC2 .

Transmission time calculating section 136, transmission section 137 calculates a transmission time T _T is the time to transmit the power status data. Specifically, the transmission time calculation unit 136 calculates the time from the dispersion reference time T _C1, which is an intermediate time of the preset power generation end width W ₁ , to the power generation end time T _E2 as the end difference D ₁ . .

Here, the power generation termination width W ₁ is preset to a time zone including the time at which the photovoltaic device 100 is expected to end power generation. Therefore, the power generation end time _{T E2} of each photovoltaic power generator 100 is distributed by the power generation termination width _W within _1.

Then, the transmission time calculation section 136 calculates the ratio of the finished difference D _1, as the ratio of the transmission difference D ₂ is equal to the transmitted dispersion width W _2, a transmission difference D ₂ with respect to the generator to complete the width W ₁ . _{That, W 1: D 1 = W} 2: calculates a transmission difference _{D 2} satisfying the relation of _{D 2.}

Then, the transmission time calculation section 136, based on the transmitted reference time _{T C2} and transmits difference _{D 2,} calculates the transmission time _{T T.} Specifically, as illustrated in FIG. 3, when the power generation end time T _E2 is later than the dispersion reference time T _C1 , the transmission time calculation unit 136 adds the transmission difference D ₂ to the transmission reference time T _C2. Thus, the transmission time T _T is calculated. On the other hand, when the power generation end time T _E2 is earlier than the dispersion reference time T _C1 , the transmission time calculation unit 136 calculates the transmission time T _T by subtracting the transmission difference D ₂ from the transmission reference time T _C2. . As described above, the transmission time determination unit 130a determines the transmission time T _T that is the time at which the power generation status data is transmitted to the management server 30.

The transmission unit 137 transmits the power generation status data up to the transmission time T _T to the management server 30 at the determined transmission time T _T.

(3) Operation of Communication Device Next, the operation of the communication device 130 according to the present embodiment will be described with reference to the flowchart shown in FIG.

  In step S <b> 101, the communication device 130 acquires the output power of the solar power generation device 100 measured in real time by the power meter 120.

  In step S <b> 102, the communication device 130 determines whether the output power of the solar power generation device 100 is greater than “0”. When the output power of the solar power generation device 100 becomes larger than “0”, the process proceeds to step S103. On the other hand, when the output power of the photovoltaic power generation apparatus 100 is not greater than “0”, the process returns to step S101.

In step S103, the communication apparatus 130 detects the time when the value of the output power is greater than “0” as the temporary power generation start time T _S1 .

In step S104, the communication device 130 determines whether or not the temporary power generation start time T _S1 detected this time is earlier than the stored temporary power generation start time T _S0 . If the temporary power generation start time T _S1 is earlier, the process proceeds to step S105. On the other hand, when temporary power generation start time _TS0 is earlier, the process proceeds to step S106.

In step S105, the communication device 130 sets the temporary power generation start time T _S1 to the power generation start time T _S2 .

In step S106, the communication device 130 sets the temporary power generation start time T _S0 to the power generation start time T _S2 .

  In step S107, the communication device 130 determines whether or not the output power of the solar power generation device 100 has become “0”. When the output power of the solar power generation device 100 becomes “0”, the process proceeds to step S108. On the other hand, when the output power of the photovoltaic power generation apparatus 100 is not “0”, the process repeats step S107.

In step S108, the communication device 130 detects the time when the value of the output power becomes “0” as the provisional power generation end time T _E1 .

In step S107, the communication device 130 determines whether or not the temporary power generation end time T _E1 detected this time is later than the stored temporary power generation end time T _E0 . If the provisional power generation end time T _E1 is later, the process proceeds to step S110. On the other hand, if the temporary power generation end time T _E0 is later, the process proceeds to step S111.

In step S110, the communication device 130 sets the temporary power generation end time T _E1 to the power generation end time T _E2 .

In step S111, the communication device 130 sets the temporary power generation end time T _E0 to the power generation end time T _E2 .

In step S112, the communication device 130, based on the power generation end time _{T E2} and power generation start time _{T S2,} it calculates the transmission dispersion width _{W 2.}

In step S113, the communication device 130 calculates the transmission reference time T _C2 based on the power generation end time T _E2 and the power generation start time T _S2 .

In step S114, the communication device 130, based on the power generation end time _{T E2} and distributed reference time _{T C1,} it calculates a termination difference _{D 1.}

In step S115, the communication device 130 calculates the ratio of the finished difference _{D 1,} as the ratio of the transmission difference _{D 2} is equal to the transmitted dispersion width _{W 2,} a transmission difference _{D 2} with respect to the generator to complete the width _{W 1.}

In step S116, the communication device 130, based on the transmitted reference time _{T C2} and transmits difference _{D 2,} calculates the transmission time _{T T.}

In step S117, the communication device 130, in the transmission time _{T T,} and transmits the power generation state data to the transmission time _{T T} to the management server 30.

(Function and effect)
According to the communication device 130 according to the first embodiment, the transmission time determination unit 130a is configured to measure the time when the measured output power of the solar power generation device 100 is “0” and the time when the output power is greater than “0”. based on, to determine the transmission time T _T of the power generation state data.

Here, since the sunrise time and sunset time differ according to the longitude and latitude at which each photovoltaic power generation device 100 is located, the time when the output power of each photovoltaic power generation device 100 is “0” and the output power is “0”. The time that becomes larger is different. Therefore, as long as the photovoltaic power generator 100 is the longitude and latitude is not the same position, it is possible to disperse the transmission time T _T at each communication device 130 in the time zone of the transmission dispersion width W _2. That is, the access to the management server 30 is distributed by utilizing the fact that the power generation end time T _E2 and the power generation start time T _S2 vary according to the difference between the longitude and latitude of the installation locations of the respective solar power generation devices 100. ing. As a result, the occurrence of congestion on the management server side that receives the power generation status data can be reduced.

Further, according to the communication device 130 according to the first embodiment, the power generation status data is transmitted within the time period from the power generation end time T _E2 to the power generation start time T _S2 at the transmission time T _T. Therefore, each communication device 130 can transmit the power generation status data in a time zone when there is a margin in communication resources of each customer 10.

[Second Embodiment]
The second embodiment will be described below with reference to the drawings. In the following, differences between the first embodiment and the second embodiment described above will be mainly described.

Specifically, in the first embodiment described above, the transmission dispersion width W ₂ is calculated based on the power generation end time T _E2 and the power generation start time T _S2 , but in the second embodiment, the transmission dispersion width W _2. A fixed value set in advance is used. Therefore, the communication device 130 according to the second embodiment does not include the power generation start time determination unit 133 and the reference time / dispersion width calculation unit 135.

(1) Detailed Configuration of Communication Device The detailed configuration of the communication device 130 will be described with reference to the drawings. FIG. 5 is a functional block configuration diagram of the communication device 130 according to the second embodiment. As illustrated in FIG. 5, the communication device 130 includes a memory 131, a power generation status data acquisition unit 132, a power generation end time determination unit 134, a transmission distribution width memory 138, a transmission time calculation unit 136, and a transmission unit 137.

  Here, the power generation end time determination unit 134, the transmission distribution width memory 138, and the transmission time calculation unit 136 constitute a transmission time determination unit 130a according to the second embodiment.

The power generation end time determination unit 134 stores the time when the value of the output power currently stored in the memory 131 becomes “0”. When the time when the value of the output power becomes “0” is after the power generation limit time _{TL, the} power generation end time determination unit 134 sets the time as the power generation end time T _E2 . Here, the power generation limit time _TL is a time at which the power generation end time T _E2 does not arrive unless the weather is irregular. Therefore, when the time when the value of the output power becomes “0” is before the power generation limit time T _L , the power generation end time determination unit 134 does not set the time as the power generation end time T _E2 . Incidentally, the power generation limit time T _L is the start time of the power generation termination width W _1.

Submit dispersion width memory 138 stores the transmission dispersion width W ₂ is a preset fixed value. Transmitting the dispersion width _{W 2} of the second embodiment, as shown in FIG. 6, 0:00 to 4:00 of the time zone.

The transmission time calculation unit 136 starts transmission processing of power generation status data that is a preset end time of the power generation end width W ₁ at a transmission processing start time T _M.

The transmission time calculation unit 136 calculates a time from the dispersion reference time T _C1, which is an intermediate time of the power generation end width W ₁ , to the power generation end time T _E2 as the end difference D ₁ . Next, the transmission time calculation unit 136 calculates a transmission difference D ₂ that satisfies the relationship W ₁ : D ₁ = W ₂ : D ₂ . Then, the transmission time calculation section 136, based on the transmitted reference time _{T C2} and transmits difference _{D 2,} as shown in FIG. 6, calculates the transmission time _{T T.}

On the other hand, transmission time calculating section 136, if the power generation end time determination unit 134 can not be set to the power generation end time T _E2, power generation end time generation end time T _E2 in the previous transmission processing in the current transmission process T _E2 Or the power generation end time T _E2 can be set at a random time in the time zone of the power generation end width W ₁ .

As described above, the transmission time determination unit 130a according to the second embodiment determines the transmission time T _T for transmitting power status data to the management server 30.

The transmission unit 137 transmits the power generation status data up to the transmission time T _T to the management server 30 at the determined transmission time T _T.

(2) Operation of Communication Device Next, the operation of the communication device 130 according to the present embodiment will be described with reference to the flowchart shown in FIG.

  In step S <b> 201, the communication device 130 acquires the output power of the solar power generation device 100 measured in real time by the power meter 120 as needed.

In step S202, the communication apparatus 130 determines whether or not the transmission processing start time _TM has arrived. If the transmission process start time _TM has arrived, the process proceeds to step S203. When the transmission processing start time T _M has not come, the process returns to step S201.

  In step S203, the communication device 130 stores the time when the value of the output power stored in the memory 131 becomes “0”.

In step S204, the communication device 130 determines whether or not the time when the value of the output power becomes “0” is after the power generation limit time _TL . If it is after the power generation limit time _TL , the process proceeds to step S205. If it is before the power generation limit time _TL , the process proceeds to step S209.

In step S205, the communication device 130, based on the power generation end time _{T E2} and distributed reference time _{T C1,} it calculates a termination difference _{D 1.}

In step S206, the communication device 130 calculates the ratio of the finished difference _{D 1,} as the ratio of the transmission difference _{D 2} is equal to the transmitted dispersion width _{W 2,} a transmission difference _{D 2} with respect to the generator to complete the width _{W 1.}

In step S207, the communication device 130, based on the transmitted reference time _{T C2} and transmits difference _{D 2,} calculates the transmission time _{T T.}

In step S208, the communication device 130, in the transmission time _{T T,} and transmits the power generation state data to the transmission time _{T T} to the management server 30.

On the other hand, in step S209, the communication apparatus 130 determines whether or not the power generation end time T _E2 in the previous transmission process is stored. If the power generation end time _TE2 in the previous transmission process is stored, the process proceeds to step S210. If the power generation end time _TE2 in the previous transmission process is not stored, the process proceeds to step S211.

In step S210, the communication device 130 sets the power generation end time _{T E2} in the previous transmission processing as a generator end time _{T E2} in the current transmission process.

In step S211, the communication device 130 sets the random generation end time _{T E2} between the transmission dispersion width _{W 2.}

(Function and effect)
According to the communication device 130 according to the second embodiment, the transmission time determination unit 130a transmits the power generation status data transmission time T _T based on the time when the measured output power of the solar power generation device 100 is “0”. To decide.

Here, since the sunset time differs depending on the longitude and latitude of the installation location of each photovoltaic power generation device 100, the time when the output power of each photovoltaic power generation device 100 becomes “0” It is time peculiar to the place of installation. Therefore, since the transmission time T _T determined based on such a time can be a time specific to each communication device 130, it is possible to transmit power generation status data from each communication device 130 to the management server 30 all at once. Can be suppressed. As a result, it is possible to reduce the occurrence of congestion on the management server 30 side that receives the power generation status data.

Further, according to the communication apparatus 130 according to the second embodiment, it is possible to use a preset fixed value as a transmission variance width W _2. Therefore, it is not necessary to calculate the transmission dispersion width W ₂ in the communication device 130, it is possible to reduce the processing load in the communication device 130.

[Other Embodiments]
Although the present invention has been described with reference to the above-described embodiments, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

For example, in the above-described embodiment, the communication device 130 is connected to the power meter 120, but the communication device 130 may be connected to the power conditioner 110. The power conditioner 110 can also measure the output power of the solar power generation device 100. The communication device 130 may be connected to an ammeter provided between the solar power generation device 100 and the power conditioner 110. Even with an ammeter, it is possible to indirectly measure the output power of the photovoltaic power generation apparatus 100. When communication device 130 is connected to an ammeter, power generation start time T _S2 is set based on the time when the value of output power becomes greater than a predetermined value (≠ 0), and the value of output power is set to a predetermined value. It is preferable to set the power generation end time _TE2 based on the time when (≠ 0) or less. This is because the current is measured if there is a slight amount of light even at midnight, and it is necessary to determine that the sunset is below the predetermined value. In this case, the predetermined value may be a value indicating that the output power of the photovoltaic power generator is substantially zero.

In the above-described embodiment, the power generation start time T _S2 is set based on the time when the value of the output power stored in the memory 131 becomes larger than “0”. However, the present invention is not limited to this. It is not a thing. The power generation start time T _S2 may be set when the value of the output power stored in the memory 131 is greater than “predetermined period 0”. Similarly, in the above-described embodiment, the power generation end time T _E2 is set based on the time when the value of the output power stored in the memory 131 becomes “0”. When it is “predetermined period 0”, the power generation end time _TE2 may be set.

Further, in the above embodiment, transmission dispersion width W ₂ has been set at night impact on the communication environment of each customer 10 are expected to be relatively small, but is not limited thereto. Transmitting the dispersion width W ₂ may be set in the daytime.

  Further, although not particularly mentioned in the above-described embodiment, the power generation status data may be encrypted by the communication device 130.

  In the first embodiment described above, the first time that was the latest in the past and the second time that was the earliest in the past were set as the “most characteristic time”, but the first time that was the earliest in the past and the latest that was the latest in the past. The second time may be the “most characteristic time”.

In the second embodiment described above, the output power of the photovoltaic power generation apparatus 100 is based on the time becomes "0", but determines the transmission time T _T of the power generation situation data is not limited thereto. Transmission time T _T, the output power of the photovoltaic device 100 may be determined based on the larger time than "0".

Moreover, in 2nd Embodiment mentioned above, although the time when the output electric power of the solar power generation device 100 became "0" was set as the electric power generation end time _TE2 , it is not limited to this. Similarly to the first embodiment described above, the power generation end time T _E2 may be set with reference to the temporary power generation start time T _E0 that is the earliest time among the temporary power generation start times detected up to the current transmission process. .

Although not particularly mentioned in the second embodiment described above, the transmission time determination unit 130a may update the transmission time T _T based on “information specific to the area where the solar power generation device 100 is provided”. preferable.

  Here, “information peculiar to the area where the photovoltaic power generation apparatus 100 is provided” refers to the population, population density, regional temperament, regional policy, and the like in the area. For example, in a region with a high population density, a large number of photovoltaic power generation devices 100 may be located on substantially the same longitude and latitude. Therefore, there is a possibility that the power generation status data may be transmitted simultaneously from a large number of communication devices 130 in a specific time zone.

Therefore, the communication device 130 for transmitting power status data to this specific time period, it is preferable to change the transmission time T _T using a predetermined conversion method. Specifically, when the occurrence of congestion is predicted after 120 minutes, the transmission time T _T of the communication device 130 at which the transmission time T _T arrives after X minutes is calculated based on the following equation (1). The transmission time T _T 'is updated.

T _T ′ = 120 + (X−120) × k (1)
According to the above formula (1), by appropriately setting the coefficient k, it is possible to suppress power generation status data from being transmitted all at once in a specific time zone. Further, the degree of suppression can be adjusted according to the magnitude of the coefficient k.

  In addition, the power generation end time greatly depends on the weather of the day. The influence of such weather can be reduced by storing the latest power generation end time in the past or by performing an irregular process with an error when the power generation end time is earlier than a predetermined time.

  It should be noted that each process / procedure described in each embodiment described above can be implemented as a computer program and executed by a PC or the like.

  Thus, it should be understood that the present invention includes various embodiments and the like not described herein. That is, the invention specific matter of a claim includes the reasonable range grasped | ascertained from the said indication.

It is the schematic which shows the structure of the solar energy power generation system which concerns on 1st Embodiment. It is a functional block block diagram of the communication apparatus 130 which concerns on 1st Embodiment. It is a figure which shows an example of the electric power generation status data which concern on 1st Embodiment. It is a flowchart which shows operation | movement of the communication apparatus 130 which concerns on 1st Embodiment. It is a functional block block diagram of the communication apparatus 130 which concerns on 2nd Embodiment. It is a figure which shows an example of the electric power generation status data which concern on 2nd Embodiment. It is a flowchart which shows operation | movement of the communication apparatus 130 which concerns on 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Consumer 15 ... Connection line 20 ... Network 25 ... Connection line 30 ... Management server 35 ... Power transmission line 100 ... Solar power generation device 110 ... Power conditioner 120 ... Wattmeter 130 ... Communication device 130a ... Transmission time determination part 131 ... Memory 132 ... Power generation status data acquisition unit 133 ... Power generation start time determination unit 134 ... Power generation end time determination unit 135 ... Reference time / dispersion width calculation unit 136 ... Transmission time calculation unit 137 ... Transmission unit 138 ... Transmission distribution width memory 140 ... Power distribution Panel 150 ... Load

Claims (9)

A plurality of solar power generation devices;
A plurality of communication devices connected to each of the plurality of photovoltaic power generation devices;
A photovoltaic power generation system including a management server connected to each of the plurality of communication devices via a communication line,
Each of the plurality of communication devices
A power generation status data acquisition unit that acquires power generation status data that is at least one of current, voltage, power, and amount of solar radiation regarding the power generation status of each of the plurality of photovoltaic power generation devices within a predetermined period;
A transmission unit for transmitting the power generation status data to the management server via the communication line;
A transmission time determination unit that determines a transmission time that is a time for transmitting the power generation status data to the management server;
The transmission time determination unit includes a first time when the power generation status data of each of the plurality of photovoltaic power generation devices is equal to or lower than a first predetermined value, and the power generation status data of each of the plurality of solar power generation devices is a second predetermined The transmission time is determined based on at least one of the second times that is greater than the value. The at least one of the first predetermined value or the second predetermined value is a value indicating that the power generation status data of each of the plurality of photovoltaic power generation devices is substantially zero. The photovoltaic power generation system described in 1. 3. The transmission time determination unit according to claim 1, wherein the transmission time determination unit determines the transmission time based on a difference between the first time or the second time and a predetermined reference time. 4. Solar power system. The solar power generation system according to any one of claims 1 to 3, wherein the transmission time is between the first time and the second time. 5. The transmission time determination unit updates the determined transmission time based on information specific to an area where each of the plurality of photovoltaic power generation devices is provided. 6. The described solar power generation system. The sunlight according to any one of claims 1 to 5, wherein the transmission time determination unit sets the most characteristic time among the one time detected in the past as the one time of the current time. Power generation system. The communication device is connected to a solar power generation device and transmits power generation status data, which is at least one of current, voltage, power, and amount of solar radiation, related to the power generation status of the solar power generation device, to a management server via a communication line. And
A power generation status data acquisition unit for acquiring the power generation status data;
A transmission unit for transmitting the power generation status data to the management server;
A transmission time determination unit that determines a transmission time that is a time for transmitting the power generation status data to the management server;
The transmission time determination unit includes a first time when the power generation status data of the solar power generation device is equal to or less than a first predetermined value, and a second time when the power generation status data of the solar power generation device is greater than a second predetermined value. The communication apparatus, wherein the transmission time is determined based on at least one of the times. Connected to a solar power generation device, and functions as a communication device that transmits power generation status data that is at least one of current, voltage, power, and solar radiation amount to the management server via a communication line regarding the power generation status of the solar power generation device To the computer
Step A for acquiring the power generation status data;
At least one of the first time when the power generation status data of the solar power generation device is equal to or less than a first predetermined value and the second time when the power generation status data of the solar power generation device is greater than a second predetermined value. Based on the process B for determining a transmission time, which is a time for transmitting the power generation status data to the management server,
A communication program that causes the management server to execute the step C of transmitting the power generation status data at the transmission time. A solar power generation system including a plurality of solar power generation devices, a plurality of communication devices connected to each of the plurality of solar power generation devices, and a management server connected to each of the plurality of communication devices via a communication line Control method,
Each of the plurality of communication devices acquires a power generation status data that is at least one of current, voltage, power, and amount of solar radiation regarding the power generation status of each of the plurality of solar power generation devices, and
Each of the plurality of communication devices has a first time when the power generation status data of each of the plurality of solar power generation devices is equal to or lower than a first predetermined value, and the power generation status data of each of the plurality of solar power generation devices is second. Determining a transmission time that is a time for transmitting the power generation status data to the management server based on at least one of the second times that is greater than a predetermined value; and
Each of the plurality of communication devices includes a step C of transmitting the power generation status data to the management server via the communication line.

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