JP3035193B2 - Remote information collection device for solar power generation facilities - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote information collecting device for monitoring the power generation status of a solar cell in a solar power generation facility utilizing solar energy at a remote management facility.

[0002]

2. Description of the Related Art In recent years, power generation equipment utilizing solar energy using a power generation device based on solar cells has been widely used due to a demand for power saving. Solar power generation facilities
Communication devices using public telephone lines and the like are used in order to monitor the power generation status of each photovoltaic energy-using power generation facility at a remote management facility since the power generation facilities are scattered and installed in various places. This communication device transmits data such as generated power measured by a data measuring device provided in a solar energy-utilizing power generation facility from a power generation side transmission / reception device to a management side transmission / reception device of a management facility via a public telephone line or the like. Things.

[0003]

However, in the conventional communication device of the solar energy utilizing power generating equipment, the solar energy utilizing power generating equipment transmits the measurement data almost every real time, for example, at regular time intervals. In addition, transmission is performed even during the daytime when the amount of power generated by the solar cell is large, and large noise generated by the inverter of the power generation device affects the transmission / reception device on the management side, the public telephone line, and the like, resulting in good communication. There is a problem that it may not be possible to do. Further, if the management-side transmitting / receiving device cannot correctly receive the measurement data transmitted from the solar energy-utilizing power generation facility, an operator of the management facility confirms the failure of the reception and operates the power-generating side transmitting / receiving device. It is necessary to prompt the user to resend the message, which causes a problem that the operation is troublesome. In addition, since a management facility under the jurisdiction of transmitting data for each photovoltaic power generation facility utilizing solar energy is defined, it is possible to receive this data at a management facility outside the jurisdiction and check the power generation status of any photovoltaic power generation facility. There was also a problem that it could not be done.

The present invention has been made in view of the above circumstances, and transmits measurement data based on a transmission instruction from a management facility, and automatically retransmits the data when reception fails. It is an object of the present invention to provide a remote information collection device for a solar energy-utilizing power generation facility capable of performing the above-mentioned operations.

[0005]

That is, in order to solve the above-mentioned problems, the present invention provides a solar energy generator having a power generation device using a solar cell and a data measurement storage device for measuring and storing the power generation status of the power generation device. A power transmitting / receiving device for transmitting data measured by the data measurement storage device is provided on the utilization power generation facility side, and the power generation transmission / reception device is provided on a management facility remote from the solar energy-utilizing power generation facility; In a remote information collection device of a solar energy-utilizing power generation facility provided with a management-side transmission / reception device that receives data transmitted by a communication line via a communication line, the management-side transmission / reception device includes: Data transmission instructing means for instructing the power transmitting and receiving device to transmit data,
Data reception determining means for determining whether or not the data sent from the power transmitting / receiving device has been correctly received, and the power transmitting / receiving device when the data reception determining means determines that data reception has failed. Data retransmission instructing means for instructing retransmission of data, and when a data transmission instruction is transmitted from the data transmission instructing means of the management side transmitting / receiving apparatus to the power generation side transmitting / receiving apparatus. ,
The data transmission means for transmitting the data measured and stored by the data measurement storage device and the data retransmission instruction from the data retransmission instruction means of the management-side transmission / reception device, the data retransmission instruction is transmitted first. Data retransmitting means for retransmitting the same data as the data.

The data transmitting means and the data retransmitting means of the power transmitting and receiving device transmit the transmission data by adding a terminal code to the end of the transmission data. The reception success is determined by detecting the terminal code at the end of the reception data.

[0007] According to the means, the data measurement storage device of the solar energy utilizing power generation equipment measures and stores the power generation status of the power generation device as needed. Then, when the data transmission instructing means of the management-side transmission / reception apparatus instructs the power generation-side transmission / reception apparatus to transmit data, for example, at night when the solar cell is not generating power, the data transmission means of the power generation-side transmission / reception apparatus stores the data. And send the data. Therefore, the management facility instructs transmission of all data for one day, for example, when the solar cell is not generating power, thereby reducing the influence of noise due to the inverter of the power generation device or the like when transmitting this data. be able to. In addition, since the data transmission instructing means of the power transmitting / receiving device transmits data in response to the transmission instruction by the data transmitting instructing device of the managing transmitting / receiving device, there are a plurality of management facilities, Even when the transmission instructing means appropriately instructs the transmission, the data can be transmitted to each management-side transmitting / receiving device.

In the management-side transmitting / receiving device, the data reception determining means determines whether or not the transmitted data has been correctly received. By instructing transmission,
The data retransmitting means of the power transmitting / receiving device is automatically retransmitted. Therefore, even when the data reception fails, it is not necessary for the operator to confirm the failure and prompt the user to retransmit the data.

[0009] Here, the data reception determining means, when an error detecting code is added to the transmission data and transmitted, determines whether or not the reception was successful by the error detection by the error detecting code. You can judge. As an error detection method using an error detection code, a parity check such as a cyclic redundancy check (CRC) is generally used. Further, instead of the error detection code, an error correction code (error correction code) for performing error correction and detection of only an error that cannot be completely corrected by the error correction is performed.
correcting code) can also be added. In this case, even if an error occurs in the received data, the reception is determined to be successful if the error can be corrected. These error detections may be performed for all data, but may be detected, for example, in units of blocks obtained by dividing all data into fixed lengths. In this case, it is only necessary to retransmit only the block in which the error is detected.

[0010] According to the means, the terminal code is added to the end of the transmission data. Therefore, in the management transmitting / receiving apparatus, this terminal code appears in the received data,
It is possible to detect that the end of the data has been reached and the reception has been completed. Further, even when a redundant code such as an error detection code is not added to the transmission data, if the reception is stopped without the appearance of such a terminal code, the data reception determining unit can determine that the reception has failed. There is no need to perform error detection processing, and it is possible to easily determine whether or not reception has succeeded. Note that a unique code or a unique combination of codes that cannot appear in the data is used as the end code.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, and is a block diagram showing a configuration of a solar energy utilizing power generation facility.

The solar-energy-utilizing power generation facility 1 of this embodiment generates power using a solar cell 2 installed outdoors. The solar cell 2 includes a semiconductor element array of a solar cell that generates DC power according to the amount of solar radiation. This solar cell 2
DC power generated by the inverter 3 is converted into AC power by the inverter 3 and supplied to the low-voltage distribution line 4. The low-voltage distribution line 4 is connected to a power system via a service line 5. The inverter 3 is a stationary DC / AC converter using a semiconductor element. The low-voltage distribution line 4 is a distribution line for performing power distribution to a load (not shown) in a facility where the solar energy-utilizing power generation facility 1 is installed. Accordingly, the solar cell 2 supplies power to these loads in connection with the power system. In the drawings, protection devices such as a system interconnection protection device and a circuit breaker for wiring are not shown.

On the input / output line of the inverter 3, a DC-side power detection device 6 and an AC-side power detection device 7 are provided, and the voltage value and the current value detected by these power detection devices 6 and 7 are provided. Is sent to the data measuring device 8. The data measurement device 8 measures the DC-side input power and the AC-side output power of the inverter 3 based on the voltage value and the current value detected by the power detection devices 6 and 7. The data measuring device 8 also measures the amount of solar radiation and the temperature by using a pyranometer 9 and a thermometer 10 arranged near the installation position of the solar cell 2. Each data measured by the data measuring device 8 is
The data is sent to the data processing device 11 and temporarily stored. Also,
Each of these data can be displayed on a display 12 connected to the data measuring device 8 or printed by a printer 13. The data processing device 11 is an arithmetic processing storage device including a personal computer or the like, and is also used as a communication terminal by connecting to the public telephone line 14 via a serial interface and a modem (not shown).

The public telephone line 14 is connected to each of the management facilities 15,
The fifteen data processing devices 16, 16 are also connected via a serial interface and a modem (not shown). These data processing devices 16, 16 are also arithmetic processing storage devices such as personal computers and are used as communication terminals. In addition, each data processing device 16 includes:
A display 17 and a printer 18 are connected, respectively.
Data can be displayed and printed as appropriate.

The data processing device 11 of the solar power generation facility 1 and the data processing device 1 of any management facility 15
6 is connected via the public telephone line 14 as described above, so that data communication can be performed by an appropriate communication protocol. Then, the data processing device 16 of the management facility 15 can instruct transmission of the measurement data by transmitting the data to the data processing device 11 of the solar energy-based power generation facility 1. Further, when a reception error occurs during the reception of the measurement data, the data processing device 16 detects the reception error and instructs the data processing device 11 to retransmit the measurement data. When receiving the communication from the data processing device 16, the data processing device 11 of the solar energy-based power generation facility 1 transmits the measurement data stored in the storage device. At this time, an end code is added to the end of the measurement data to be transmitted. As the end code, a unique code that cannot exist in the measurement data or a unique combination of codes is used. Accordingly, the data processing device 16 detects that the reception of the measurement data has been completed normally when the terminal code appears in the received data, and determines that a reception error has occurred when the reception stops without the terminal code appearing. Also, when receiving a retransmission instruction from the data processing device 16, the data processing device 11 retransmits the same measurement data as the previously transmitted measurement data with the termination code added thereto. A redundant code such as an error detection code may be added to the measurement data to be transmitted, and the data processing device 16 may detect a reception error by performing error detection based on the redundant code. Further, it is also possible to divide the measurement data to be transmitted into blocks and detect a reception error for each block and retransmit when a reception error occurs.

In the remote information collecting apparatus for a solar energy utilizing power generation facility having the above-mentioned configuration, the data processing apparatus 16 of the management facility 15 automatically starts the timer at a suitable time at night, for example, by starting a timer. A call is transmitted to one data processing apparatus 11 to instruct data transmission. Then, the data processing device 11 of the solar energy utilizing power generation facility 1 receives the instruction and transmits the stored measurement data. Therefore, the solar energy utilizing power generation equipment 1
Since the data processing device 11 transmits the measurement data during the night when the solar cell 2 does not generate power, it can perform communication in a good line state without being affected by noise generated in the inverter 3 or the like during power generation. it can. In addition, since the data processing device 16 of another management facility 15 can similarly instruct transmission, the arbitrary management facility 15 can receive the measurement data.

The data processing device 16 of the management facility 15
Then, when the terminal code is found in the received data, the end of the measurement data is reached and it can be determined that the reception has been completed normally.
Success or failure of reception can be easily detected. If the reception stops without the termination code appearing, it is determined that a reception error has occurred and retransmission is instructed.
1 retransmits the measurement data in response to this instruction, so that the operator of the management facility 15 does not need to confirm the reception error and prompt the user to retransmit the data by operation.

In this embodiment, the solar energy
The case where the data processing device 11 of the power generation facility 1 and the data processing device 16 of the management facility 15 are connected via the public telephone line 14 has been described, but a dedicated line is used instead of the public telephone line 14 or wireless communication is used. Remote information collection may be performed.

[0020]

As is apparent from the above description, according to the remote information collecting apparatus for the solar energy utilizing power generation equipment of the present invention, the transmission of the measurement data from the solar energy utilizing power generating equipment is performed by the management facility. Therefore, communication can be performed in a good line state during a time period, such as at night, when the influence of noise from the inverter is less likely. In addition, a plurality of management facilities can individually acquire data and perform a confirmation operation or the like. In addition, the management facility automatically retransmits the data when the data reception fails, so that the operator does not need to confirm the data reception failure and prompt the user to retransmit the data.

Further, if the reception success is determined based on the terminal code added to the end of the transmission data, complicated remote information collection processing becomes unnecessary, and communication can be performed in a simple procedure.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention and showing a configuration of a solar energy-utilizing power generation facility.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 solar energy-utilizing power generation equipment 2 solar cell 3 inverter 6 power detection device 7 power detection device 8 data measurement device 9 pyranometer 10 thermometer 11 data processing device 14 public telephone line 15 management facility 16 data processing device

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Akio Takano 6-1-1-1 Takanodai, Sugito-machi, Sugito-cho, Kita-Katsushika-gun, Saitama Prefecture (72) Inventor Masaru Takai 4-10-2 Higashi-Funabashi, Funabashi City, Chiba Prefecture −105 (72) Inventor Hiromune Nomura 3-2-5 Kasumigaseki, Chiyoda-ku, Tokyo Showa Shell Sekiyu K.K. (72) Inventor Masumi Obata 1st Nishinosho Inomabacho, Kichijoin, Minami-ku, Kyoto Japan Inside Battery Co., Ltd. (72) Akira Kitagawa Inventor: 1 Kinoshoin Nishinosho Inobaba-cho, Minami-ku, Kyoto Japan Battery Co., Ltd. (56) References JP-A-7-147728 (JP, A) JP-A Sho 58-157231 (JP, A) JP-A-60-256824 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G05F 1/67 H04B 17/00

Claims (2)

(57) [Claims] 1. The data measured by the data measurement storage device is transmitted to a solar energy-using power generation facility having a power generation device using a solar cell and a data measurement storage device that measures and stores the power generation status of the power generation device. A transmitting / receiving device for receiving data transmitted by the transmitting / receiving device via a communication line at a management facility remote from the solar power generation facility. In the remote information collection device of the solar power generation equipment utilizing solar energy, the power generation device is not generating power to the management-side transmission / reception device.
A data transmission instruction means for instructing transmission of data to the generator-side transmitting and receiving apparatus at a data receiving determination means for determining whether data sent from the generator-side transmitting and receiving device has been received correctly, the data Data retransmission instructing means for instructing the power transmitting / receiving apparatus to retransmit data when the reception determining means determines that data reception has failed is provided. A data transmission unit for transmitting data measured and stored by the data measurement storage device when a data transmission instruction is transmitted from a data transmission instruction unit of the transmission / reception device; Data retransmitting means for retransmitting the same data as previously transmitted when an instruction to retransmit data is sent from the instruction means. Remote information collection device for solar energy-utilizing power generation equipment. 2. The data transmitting means and the data retransmitting means of the power transmitting / receiving apparatus perform transmission by adding a terminal code to the end of transmission data, and the data receiving determining means of the managing transmitting / receiving apparatus performs reception. 2. The remote information collection device for solar energy-utilized power generation equipment according to claim 1, wherein the reception success is determined by detecting a terminal code at the end of the data.