JP2008129663A - Photovoltaic power generation system having remote display function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To remotely monitor a photovoltaic power generation system having specifications different by delivery model with simple configurations. <P>SOLUTION: A monitored power unit side including a power control power source with a characteristic data detection means, and comprising a battery with a switching means and a photovoltaic power generation panel is provided with an MIB information storage device, a transmission/reception control means, and a communication interface for transmitting and receiving data from a communication line, and an SNMP agent function module to which an OID is attached is provided. On the other hand, the SNMP manager side is provided with: a communication interface, a transmission/reception control means, MIB database storage means, and an MIB database adding means having redundancy and adding information according to the difference of specifications, a display means, a first display control means, a characteristic data decision means and a second display control means, and the SNMP manager side and the agent function module are connected through a communication line, and remotely displayed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a photovoltaic power generation system that warns or displays at a management base where a service manager away from an installation location is located when abnormal heat generation or the like occurs during continuous operation or operation.

A solar system that can detect abnormalities in a system composed of solar cells, storage batteries, and control power supplies, dispatch repair personnel to the site at an early stage, and contribute to improving the safety and security of customers and improving customer satisfaction. As an example of a photovoltaic power generation system and a method for responding to similar requirements (in an electrical appliance), there has been disclosed Patent Document 1.

In paragraph (0006) of Patent Document 1, “a server for control that controls all home appliances in the home is provided, and this server is efficiently located in the kitchen. This server and home appliances are homes. Connected via a network line, they communicate with each other to implement a desired function using a predetermined protocol, while the control server communicates with an external personal computer, cellular phone, etc. via the Internet line network. It is connected to the device and communicates with an external communication device using the Internet protocol. " “At least one home appliance has a sub-controller inside and is located inside the home. On the other hand, the control server has a main controller inside and is located inside the home. Communication is performed with at least one home appliance using a communication protocol and a communication medium that can communicate, and each of the at least one external communication device includes a controller and is located outside the home and capable of two-way data communication. It communicates with the server using a communication protocol and communication medium. " However, although the components are described, there is no description of the specific technology for each component.

“JP 2001-218282”, “Home Appliance Network System and Operation Method”

In a solar power generation system, when an output failure due to abnormalities such as overheating of a solar battery, overdischarge or end of life of a storage battery, or a need for replacement due to deterioration of the storage battery occurs, the administrator is informed at an early stage, In order to promptly respond to repairs, etc., it operates economically and reliably with the function to notify remote service bases when an abnormality occurs in solar cells or storage batteries, ensuring safety and security for many customers There was a need to provide a practical system to give.

The solar power generation panel is configured by attaching 40 to 50 solar cells having output characteristics as shown in FIG. 3 and connecting them in series or in parallel. The no-load voltage is a low voltage V2 when it is dark in the morning and evening, but when it gets brighter, it outputs a voltage V1 higher than V2, which is 40 to 50 times the panel output voltage. The maximum power is shown at point a1, and the voltage is slightly lower than V1, but drops to near lower Vs at the time of failure. Detecting this reduced voltage and continuing to record it, for example, recording a change in voltage that has been reduced over a period of about 20 days, or whether it is in a faulty state or changing in a reduced voltage state due to continued rainy weather The engineer was deciding whether it was present at the delivery site.

Automatic judgment when there is a need for replacement due to poor power supply due to some abnormality of the solar battery or storage battery, or deterioration of the storage battery, etc. The challenge was to create a technology that could make a judgment and produce and provide a remotely-displayable solar power generation system at low cost.

In the present invention, the capacity of the storage battery connected in parallel to the solar battery has a capacity capable of continuing to supply power to the load throughout the year, for example, the power supply failure due to some abnormality of the storage battery, or the replacement of the storage battery In the system in which it is determined that a situation such as necessity has occurred and a warning is displayed, with respect to claim 1, the monitored power supply side comprising a solar battery, an auxiliary member such as a storage battery, and a control power supply apparatus The MIB information storage device for converting the characteristic value data detected by the detection means into a data bit string based on the MIB rules and storing it, the data transmission control means for transmitting the MIB data, and the data via a predetermined communication line An SNMP agent function module having a communication interface for transmission is attached to the monitored power supply device side, and SNMP money The communication interface, the MIB database storage means for receiving and storing the transmitted data, the MIB database additional recording means having redundancy so that additional data can be added, and comparing the characteristic data with the reference value to determine abnormality A determination means; a first display control means for displaying received data; a second display control means for controlling the display of the determination result; and a display means; data transmitted from the SNMP agent function module via a communication line; The determination result obtained by the determination unit is displayed on the display unit, and the solar power generation system capable of remote monitoring is provided.

With respect to claim 2, the monitoring power supply apparatus is provided with a switching operation means in addition to a detection means, and a transmission / reception control means for transmission / reception from a communication line is provided at the service base. On the SNMP manager side, switching operation command means is provided, the switching operation means is operated by the signal transmitted to the SNMP agent function module and received, and the load (and / or) storage battery is connected / disconnected, so that it does not change ( (Or changed) characteristic value data is displayed on the display means, and the solar power generation system capable of remote monitoring is provided.

3. The remote-monitorable solar light according to claim 1, wherein the detection means includes detection means for determining whether it is daytime when solar power generation is possible or nighttime when solar power generation is impossible. A power generation system was adopted.

With regard to claim 4, the daytime determination device is a daytime determination device in which a day / night distinction sensor 20 installed to receive the illuminance around the place where the photovoltaic power generation panel receives light is connected to the detection means 3. The output voltage of the photovoltaic power generation panel S is detected only when the daytime determiner determines that it is daytime. For this reason, the output voltage of the photovoltaic power generation panel S that is low in the evening is not erroneously determined as “failure” or “abnormal”.

With respect to claim 5, the detection means 3 is connected to the solar cell heat generation sensor 21 for progressive measurement, and it is completely detected that the normal temperature of the solar cell will increase and the solar cell will become abnormal. It was set as the photovoltaic power generation system which can be monitored remotely which is a detection means to detect before it breaks down. Here, the progressive measurement is a time comparison comparative temperature detection method in which the temperature increases with time. For example, the temperature difference T1 is stored in comparison with the temperature 10 minutes ago, and the temperature difference T2 in the next 10 minutes. Further, the temperature difference T3 in the next 10 minutes is stored, and when the values of T1, T2, and T3 increase in order, an “abnormal” signal is generated when the rapidly rising temperature is captured. .

With regard to claim 6, in the photovoltaic power generation system, the monitored power supply device issues a command for collecting numerical data that can determine the voltage of the storage battery or the end of life in order to determine the characteristic value of the storage battery. This is a remotely-monitored photovoltaic power generation system that is a monitored power supply device that includes a power supply function judgment means for output.

With respect to claim 7, the SNMP agent function module 8 is a remotely monitored solar power generation system which is an SNMP agent function module including a memory device having an object identifier (OID) assigned to each network monitored power supply device. .

With regard to claim 8, the SNMP agent function module is an SNMP agent function module formed by a memory device and a CPU device, each of which is provided with a number for each monitored power supply, and can be remotely monitored. A power generation system was adopted.

According to the ninth aspect of the present invention, the remote monitoring is performed such that the characteristic value stored in the MIB information storage device 5 of the monitored power supply device includes any one or all of the characteristic values capable of determining the temperature of the semiconductor element or the failure. Possible solar power generation system.

With respect to claim 10, the characteristic values stored in the MIB database storage means 30 are input voltage, input current, input power, output voltage, output current, output power, voltage / current of a predetermined part inside the monitored power supply device. , A solar power generation system capable of remote monitoring, including any or all of the characteristic values of the attached members.

With regard to claim 11, remote monitoring is possible, wherein the characteristic values of the incidental members stored in the MIB database storage means include reference characteristic values that can determine abnormality and failure in addition to voltage, current, and temperature. A solar power generation system.

According to a twelfth aspect of the present invention, the remotely monitored solar power generation system is characterized in that the data stored in the MIB information storage means is controlled according to SNMP (Simple Network Management Protocol) and transmitted / received.

In the present invention, it is detected that an abnormality has occurred in the solar cell, a power supply failure due to some abnormality of the storage battery connected in parallel to the solar battery, or a need for replacement due to deterioration of the storage battery, etc., and a warning / display As a result, it is possible to respond quickly and to supply power continuously to the load. Since the output voltage of the photovoltaic power generation panel is detected only when the daytime determiner determines that it is daytime, the output voltage of the photovoltaic power generation panel that is low in the evening will not be misjudged as “failure” or “abnormal”. In addition, the abnormality of the solar cell can be judged without taking 20 days. Since the solar cell heat generation sensor 21 detects that the solar cell will become abnormal in the progressive measurement before it completely fails, when the values of T1, T2, and T3 increase in order, it rapidly increases When an incoming temperature is detected, an "abnormal" signal is generated, so that damage to the surroundings due to overheating of the solar cell can be prevented.

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment according to the present invention. FIG. 2 is a block diagram showing a second embodiment according to the present invention. Since the same reference numerals are common to FIGS. 1 and 2, duplicate explanation in FIG. 2 is omitted. The first embodiment has been described in detail, and with respect to FIG. 2, the second embodiment, which is a simplified type that can be provided at low cost, has been described mainly with respect to the differences from FIG. 1. First, the monitored power supply device A will be described. The photovoltaic power generation panel S is connected to the control power supply circuit INV via the switching means 16 and is connected to the load 1 and the incidental member 2 (storage battery etc.) 2 via the switching means 16. The storage battery 2 is supplied by transforming the output voltage of the photovoltaic power generation panel S, and is charged or discharged to a load to supplement the output when the photovoltaic power generation panel S is short of voltage. The control power supply circuit INV includes a function for adjusting a DC voltage and an inverter for converting to an AC voltage. The monitored power supply device A is constituted by the above-described portions, the detection means 3, and the switching control means 4.

Here, the detection means 3 is the detection means 3 including a daytime determination device that determines whether it is daytime when solar power generation is possible or nighttime when solar power generation is impossible. The day / night distinction sensor 20 is connected to the detection means 3, and the output voltage of the photovoltaic power generation panel S is detected only when the daytime determiner determines that it is daytime. For this reason, the low output voltage in the case of a failure or abnormality and the low output voltage in the evening of the photovoltaic power generation panel S are mistakenly determined so as not to be determined as “failure” or “abnormal” at night. Further, the detecting means 3 is connected to the solar cell heat generation sensor 21 and detects that the normal temperature of the solar cell becomes higher and the solar cell is out of order.

Next, the SNMP agent function module 8 will be described. The MIB information storage device 5, the communication interface 7, and the transmission / reception control means 18 constitute an SNMP agent function module 8 that is attached to the monitored power supply device A. Data stored in the MIB information storage device is controlled and transmitted / received in accordance with SNMP (Simple Network Management Protocol). (In FIG. 2, the transmission / reception control means 18 replaces the data transmission control means 6.) It is responsible for remote control and remote display of the monitored power supply device A by communicating with the SNMP manager M described later via the communication line 9. ing. The MIB information storage device 5 is formed of a memory device and a CPU device that store OIDs (object identifiers) assigned to respective delivery destinations (users).

The output voltage of the photovoltaic power generation panel S and the voltage of the storage battery are detected by the detection means 3 and transmitted to the SNMP manager M for remote display. Both the output voltage of the photovoltaic power generation panel S and the voltage of the storage voltage are loaded. The difference between the voltage when the current is passed and the voltage when there is no load is important for determining whether or not it is a failure or end of life. A signal is transmitted from the SNMP manager M side to the switching control means 4 so that it can be commanded.

Next, an SNMP manager that communicates with the SNMP agent function module 8 from a remote location will be described. The SNMP manager M, which communicates via the communication line 9 and is responsible for remote control and remote display of the monitored power supply A, has a communication interface 10, transmission / reception control means 11, MIB database storage means 30, and MIB database addition. Means 12, first display control means 13, second display control means 14, determination means 15, switching operation command means 17 (there is no such means because no switching operation command is possible in FIG. 2) and display. Means D.

The MIB database storage means 30 converts the characteristic value data into a data bit string based on the MIB rules and stores it. A switching operation command means 17 is provided on the SNMP manager (M) side, and the switching operation means 16 is remotely operated by a signal transmitted to the SNMP agent function module 8 and received, and the load 1 (and / or) storage battery 2 is connected. The characteristic value data that is not changed or changed is displayed on the display means (D). The characteristic value of the storage battery 2 (ancillary member) stored in the MIB database accumulating means 30 can be determined by predicting abnormalities and failures such as internal impedance in addition to voltage, current, and temperature. As described above, since the characteristic value serving as the reference value is included, the determination result obtained by the function of the determining means for comparing and determining the reference value and the observed value is displayed on the display means (D).

A switching operation command means 17 is provided on the SNMP manager (M) side, and the switching operation means 16 is remotely operated by a signal transmitted to the SNMP agent function module 8 and received, and the load 1 (and / or) storage battery 2 is connected. -When the characteristic value data fluctuates between loaded and unloaded, it is possible to determine whether or not the storage battery 2 is near the end of life with the data displayed on the display means D, so the output of this power generation system does not stop suddenly Then, a warning is displayed quickly. The second embodiment (FIG. 2) is a simple type that does not have a function of connecting / disconnecting the load 1 (and / or) the storage battery 2, so that it can be roughly judged by the characteristic value data at the time of load.

The detection means 3 is a detection means 3 capable of detecting one or more characteristic values of the characteristic value of the monitored power supply device that can determine the temperature of the semiconductor element of the constituent element or a failure such as a short circuit between terminals. It is connected to a predetermined part of the control power circuit INV.

The SNMP agent function module 8 is an SNMP agent function module formed by a memory device and a CPU device having an object identifier (OID) assigned to each network monitored power supply device. This is advantageous in that it can be accessed by an easy and inexpensive method and the abnormality can be determined economically.

The surrounding damage caused by overheating of the solar cell can be prevented in advance, the situation such as the need to replace the storage battery has been detected, the warning and display can respond quickly and promptly, and it can continue to be loaded without interruption A solar power generation system that can be remotely inspected to enable power supply. It has the effect of giving safety and security to many customers, and has great industrial value.

It is a block diagram which shows 1st Embodiment by this invention. It is a block diagram which shows 2nd Embodiment by this invention. It is an output characteristic figure of a photovoltaic power generation panel.

Explanation of symbols

1 Load 2 Storage battery (Attachment member)
3 Detection means 4 Switching control means 5 MIB information storage device 6 Data transmission control means 7 Communication interface 8 SNMP agent function module 9 Communication line 10 Communication interface 11 Transmission / reception control means 12 MIB database additional recording means 13 First display control means 14 First 2 Display control means 15 Determination means 16 Switching operation means 17 Switching operation command means 18 Transmission / reception control means 20 Day / night distinction sensor 21 Solar cell heat generation sensor 30 MIB database storage means A Monitored power supply D Display means INV Control power supply circuit M SNMP Manager S Photovoltaic panel

Claims (12)

A MIB information storage device that converts characteristic value data detected by the detection means of the monitored power supply device including a photovoltaic power generation panel, a control power source, and an auxiliary member (storage battery, etc.) into a data bit string based on the MIB rules, and a MIB; An SNMP agent function module having a data transmission control means for transmitting data and a communication interface for transmitting the data through a predetermined communication line is attached to the monitored power supply device side, while being remotely installed A communication interface on the SNMP manager side, an MIB database storage means for receiving and storing transmitted data, an MIB database additional recording means having redundancy so that additional data can be added, and determining abnormalities by comparing with characteristic data and reference values Control means, first display control means for displaying received data, and display of judgment results Remote-monitorable solar, comprising: second display control means and display means for displaying data transmitted and received from the SNMP agent function module and judgment data obtained by the judgment means on the display means Photovoltaic system. On the monitored power supply device side, a detecting means and further a switching operation means are provided, a transmission / reception control means for transmitting / receiving from a communication line is provided, and a switching operation command means is provided on the SNMP manager side, A remote-monitorable photovoltaic power generation system, wherein a switching operation means is operated with a signal transmitted to and received by an SNMP agent function module, and the characteristic value data which has not changed or has been changed is displayed on a display means. 3. The remotely-monitorable solar power generation system according to claim 1, wherein the detection unit includes a daytime determination unit that determines whether it is daytime in which solar power generation is possible or nighttime in which solar power generation is impossible. The daytime determination device is a daytime determination device in which a day / night distinction sensor (20) installed so as to receive illuminance around a place where the photovoltaic power generation panel receives light is connected to the detection means (3). Photovoltaic power generation system that can be monitored remotely. The detection means 3 includes a solar cell heat generation sensor 21 having a progressive measurement function for detecting the temperature by a time-measurement comparison temperature detection method in which the temperature increases with time. The temperature of the solar cell increases and the solar cell is in an abnormal state. 5. The remotely-monitorable photovoltaic power generation system according to claim 1, wherein the photovoltaic power generation system is a detection means for detecting that a failure will occur before it completely fails. The monitored power supply apparatus includes a power supply function determining means for issuing a numerical data collection command capable of determining the voltage of the storage battery or the end of life in order to determine the characteristic value of the storage battery as an accessory member. The solar power generation system capable of remote monitoring according to any one of claims 1 to 5. 7. The remotely monitorable photovoltaic power generation system according to claim 1, wherein the SNMP agent function module is an NMP agent function module including a memory device having an object identifier (OID) assigned to each network monitored power supply device. 8. The SNMP agent function module according to claim 1, wherein the SNMP agent function module is an SNMP agent function module formed by a memory device to which a number for each delivery destination is assigned for each monitored power supply and a CPU device. Solar power system. 9. The remote according to claim 1, wherein the characteristic value stored in the MIB information storage device 5 of the monitored power supply device includes any one or all of characteristic values capable of determining the temperature or failure of the semiconductor element. A solar power generation system that can be monitored. The characteristic values stored in the MIB database storage means are input voltage, input current, input power, output voltage, output current, output power, voltage / current of a predetermined part inside the monitored power supply device, and characteristic values of attached members. The solar power generation system capable of remote monitoring according to any one of claims 1 to 9, wherein any one or all of the above are included. 11. The remote monitoring according to claim 1, wherein the characteristic values of the incidental members stored in the MIB database storage means include reference characteristic values that can determine abnormality and failure in addition to voltage, current, and temperature. Possible solar power generation system. 12. The remotely-monitorable photovoltaic power generation system according to claim 1, wherein the data stored in the MIB information storage means is controlled according to SNMP (Simple Network Management Protocol) and transmitted / received.

Images