JP6308892B2 - Solar power monitor system - Google Patents

Description

  The present invention relates to a photovoltaic power generation monitor system.

In recent years, there has been a growing interest in reducing CO ₂ emissions, a cause of global warming, and alternative energy for fossil fuels that are expected to be exhausted. Photovoltaic systems are attracting attention. A monitor device that is connected to such a solar power generation system and displays generated power information that is data indicating the power generation status of the solar power generation system is also commercially available.

  The main information displayed by the monitor device is information on the power generated by the solar module and converted from direct current to alternating current by the power conditioner, information on buying and selling power with the power company, and power consumption used in the home. There is information. These generated power information, purchased / sold power information, and consumed power information are generally measured by a measuring device and then sent to a monitor device for display.

  Recently, due to changes in the subsidy system, there are increasing cases of installing multiple power conditioners in response to the larger-scale full purchase system. In such a case, it is necessary to perform settings related to communication with a plurality of power conditioners in the monitor device, and the initial setting tends to be a complicated operation.

JP2012-088260A

  In Patent Document 1, a system in which a monitor device and a plurality of power conditioners are connected is disclosed. In such a system, when initializing communication between a monitoring device and multiple inverters, whether or not communication is generally established for each inverter from the monitoring device. A method of confirming the above can be considered. However, this method has a problem that the work load of the user increases as the number of power conditioners increases.

  The present invention has been made in view of the above, and an object of the present invention is to obtain a photovoltaic power generation monitoring system that does not increase a user's work load even if the number of power conditioners to be connected increases in the initial setting of communication. And

  In order to solve the above-described problems and achieve the object, the present invention is a measurement that is connected to a plurality of power conditioners that convert DC power generated by a solar cell into AC power and obtains power generated by the solar cell. A photovoltaic power generation monitor system that communicates with the measurement device and displays the generated power on a display screen, wherein the power conditioner is connected to the power conditioner Identifier setting means for setting the identifier, and the measuring device comprises power conditioner detection means for acquiring the number of connected power conditioners connected to the measuring device and the identifier, and the photovoltaic power generation system Monitor device can be installed by specifying the number of inverters installed by the user. A determination by a power conditioner setting status determination means that determines whether or not the number of installed units and the number of connected units match, and whether or not the identifier has an overlap, and determination by the power conditioner setting status determination unit Determination result display means for displaying a message based on the result on the display screen.

  According to the present invention, in the initial setting of communication, there is an effect that even if the number of power conditioners to be connected increases, the user's work load does not increase.

FIG. 1 is a diagram showing a connection configuration of a photovoltaic power generation system and a photovoltaic power generation monitoring system according to an embodiment of the present invention and a distribution board in a house. FIG. 2 is a diagram showing an example of an initial setting screen for inputting the number of installed inverters in the photovoltaic power generation system monitoring apparatus according to the embodiment of the present invention. FIG. 3 is a diagram illustrating a flowchart of the operation of the photovoltaic power generation monitor system according to the embodiment of the present invention. FIG. 4 is a diagram illustrating an example of a normal screen after determination of the setting condition of the power conditioner in the photovoltaic power generation system monitoring apparatus according to the embodiment of the present invention. FIG. 5: is a figure which shows an example of the abnormal screen after the setting condition determination of the power conditioner in the solar power generation system monitor apparatus concerning embodiment of this invention.

  Embodiments of a photovoltaic power generation monitor system according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment.
FIG. 1 is a diagram showing a connection configuration of a photovoltaic power generation system and a photovoltaic power generation monitoring system according to an embodiment of the present invention and a distribution board 20 in a house. The solar power generation system includes one or more sets of a solar cell array 1 and a power conditioner 2 connected to the solar cell array 1. The solar power generation monitor system includes a measuring device 6 and a solar power generation system monitor device 7.

  The solar cell array 1 is configured by connecting a plurality of solar cell modules in series or in parallel, and is installed on the rooftop of a house. Each of the inverters 2 includes ID (IDentification) setting means 21 that is an identifier setting means for setting each identifier to itself.

  The solar cell array 1 receives sunlight and generates power to generate DC power. The power conditioner 2 converts the DC power generated in the solar cell array 1 into AC power. The output line 5 of the power conditioner 2 is connected to the distribution board 20. The distribution board 20 includes a branch breaker 30 connected to the output line 5, a branch breaker 31 connected to the system power supply 3 which is a commercial power supply, branch breakers 32 and 33 connected to electrical devices 41 and 42 in a house, and a measuring device. A branch breaker 34 connected to the power line 10 to 6. The alternating current from the solar power generation system is consumed by the electrical devices 41 and 42 in the house via the branch breakers 30, 32 and 33 in the distribution board 20.

  When the generated power of the solar power generation system is low during cloudy weather or rainy weather, or when power generation by the solar power generation system is not possible such as at night, the power is supplied from the system power supply 3 via the distribution board 20 to the electric equipment 41. , 42. That is, power purchase is performed. If the generated power of the photovoltaic power generation system is larger than the total power consumed by the electrical devices 41 and 42 in the house at that time, the surplus generated power is supplied via the distribution board 20 to the system power supply 3. The current is reversed. That is, power is sold.

  The photovoltaic power generation system monitoring device 7 includes power conditioner installation number designation means 71, detection request means 72, power conditioner setting status judgment means 73, and judgment result display means 74. These functions are realized by application software and hardware included in the photovoltaic power generation system monitoring device 7. The photovoltaic power generation system monitoring device 7 further includes an input / output unit 75. Specifically, the input / output unit 75 may be a monitor or a liquid crystal display (LCD) to which a keyboard and a mouse are connected, or an input unit and an output unit are integrated like a touch panel. It may be a thing.

  The measuring device 6 is connected to all the power conditioners 2 through a communication line 8 wired between the power conditioners 2. The measuring device 6 receives from the power conditioner 2 power information such as the value of the generated power generated by the solar power generation system via the communication line 8. The measuring device 6 includes power conditioner detection means 61 that detects the connected power conditioner 2.

  Moreover, the current sensor 9 for detecting trading power mounted in the distribution board 20 measures the value and direction of the current flowing between the system power supply 3 which is a commercial power supply and the distribution board 20. Therefore, when current flows from the distribution board 20 toward the grid power supply 3, power is sold. When current flows from the grid power supply 3 toward the distribution board 20, power purchase is performed. Can be seen. The measuring device 6 collects values of electric power sales power and electric power purchased from the measurement result of the current sensor 9 for detecting electric power purchased and sold.

  The power line 10 connects the measuring device 6 and the distribution board 20. The measuring device 6 is connected to an outlet wired from, for example, one branch breaker 34 in the distribution board 20 or directly connected to the secondary side of the branch breaker 34, thereby supplying power via the power line 10. Is secured. The measuring device 6 measures the voltage value of the power source obtained through the power line 10 and performs calculation with the current value obtained by the current sensor 9 for detecting the purchased / sold power, that is, the purchased / sold power data, that is, the sold / sold power. Electric power data or purchased power data is obtained.

The measuring device 6 obtains power consumption from the generated power obtained from the power conditioner 2 and the traded power obtained as described above by the following calculation.
(A) When power is sold: Power consumption = Generated power-Power sold (b) When power is purchased: Power consumed = Generated power + Power purchased

  The photovoltaic power generation system monitoring device 7 displays the power or power amount data or graph obtained by the measuring device 6 on the display screen of the input / output unit 75. That is, the value of the generated power, the value of the sold power, the value of the purchased power obtained by the measuring device 6 through data collection and calculation via the communication line 8, the current sensor 9 for buying and selling power and the power line 10, And the value of the power consumption currently consumed by each electric equipment 41 and 42 is displayed on the display screen of the input-output part 75. FIG. The measuring device 6 and the photovoltaic power generation system monitoring device 7 exchange data with each other by wired communication or wireless communication.

  Before the initial setting of the solar power generation system monitoring device 7, the user including the contractor is required for communication of the power conditioner 2 by the ID setting means 21 of each of the plurality of power conditioners 2. An ID that is an identifier is set in advance. The set ID is held by a storage unit (not shown) included in each power conditioner 2. Here, the IDs set by the ID setting means 21 in the respective power conditioners 2 are different from each other, and each is an identifier having a uniqueness among a plurality of IDs.

  Next, in the initial setting of the solar power generation system monitoring device 7, the user designates the number of installed power conditioners 2 by the power conditioner installed number designation means 71. Specifically, the number of inverters installed number designation means 71 displays an initial setting screen as shown in FIG. 2 on the display screen of the input / output unit 75, for example. The subsequent operation of the photovoltaic power generation monitor system will be described with reference to the flowchart of FIG.

  The user designates the number of installed inverters 2 on the screen of FIG. Then, when the user subsequently presses the detection button 15 (FIG. 3, step S101), the inverter-installed-unit designation unit 71 accepts the number of units designated by the user. At the same time, when the detection button 15 is pressed, a detection request is transmitted from the detection request means 72 to the measuring device 6 (step S102).

  The power conditioner detection means 61 of the measuring device 6 that has received the detection request detects the power conditioner 2 connected to the measuring device 6 at that time, and how many power conditioners 2 are connected, Is acquired (step S103). Specifically, for example, a packet for requesting ID notification is broadcast from the measuring device 6 to the plurality of power conditioners 2 via the communication line 8. Then, each power conditioner 2 that has received the packet sends a reply packet including information of its own ID to the measuring device 6. The power conditioner detection means 61 is connected to the measuring device 6 based on the number of the power conditioners 2 that have sent the reply packets together with the IDs obtained from the reply packets from the power conditioners 2. The number of connected inverters 2 is acquired.

  The information on the number of connected inverters 2 and the ID acquired by the power conditioner detection means 61 as described above is transferred from the measuring device 6 to the photovoltaic power generation system monitoring device 7. Then, the power conditioner setting status determination means 73 determines whether or not the number of installations received by the power conditioner installation quantity designation means 71 and the number of connected power conditioners 2 acquired by the power conditioner detection means 61 are the same. Is determined (step S104).

  When it is determined that the number of installed inverters is the same as the number of installed inverters and the number of connected inverters 2 (step S104: Yes), the power conditioner setting status determining unit 73 It is determined whether or not the IDs acquired by the na detector 61 are duplicated (step S105). If there is no overlap (No at Step S105), the determination result display means 74 inputs / outputs a normal screen as shown in FIG. 4, for example, based on the determination result of the power conditioner setting status determination means 73 at Steps S104 and S105. The data is displayed on the display screen of the unit 75 (step S106).

  The screen shown in FIG. 4 shows the number of connected power conditioners 2 and the IDs acquired by the power conditioner detection means 61, and no problem occurs in the determination by the power conditioner setting status determination means 73. Therefore, for the final confirmation to the user, for example, a message such as “Press OK button if there is no problem, please press the detection button to detect again” is displayed. If there is no problem, the user presses the OK button 16 to complete the setting.

  When it is determined in step S104 that the number of installed inverters received by the power conditioner installation number specifying means 71 is different from the number of connected power conditioners 2 acquired by the power conditioner detecting means 61 (step S104: No), or When it is determined in step S105 that the ID acquired by the power conditioner detection unit 61 is duplicated (step S105: Yes), the determination result display unit 74 displays an abnormal screen as shown in FIG. Is displayed on the display screen (step S107). In the screen shown in FIG. 5, the number of connected inverters 2 and the IDs are also shown. However, since there is a problem in the determination by the power conditioner setting status determination unit 73, for example, “ A message such as “The number is different from the specified number or the ID is duplicated. Please re-specify or check the power supply and connection of the power conditioner and ID assignment and press the detection button again” is displayed.

  In this case, the user performs work for solving the problem. Specifically, the number of installed inverters 2 is redesignated on the screen of FIG. Or, by referring to the list of IDs of the displayed power conditioner 2, the ID setting unit 21 may reset the ID so that there is no duplication, or the power supply and connection of the power conditioner 2 may be confirmed. Correct it to the setting you intended. In addition, the number of installed units may be re-designated after correcting the deficiencies in power supply or connection. Thereafter, the detection button 15 is pressed on the screen of FIG. 5 (step S101). Since the detection button 15 of FIG. 5 and the detection button 15 of FIG. 2 have the same function, after step S101, the process proceeds to step S102 as described above.

  As described above, according to the photovoltaic power generation monitor system according to the embodiment of the present invention, at the time of initial setting of communication between the monitor device and the plurality of power conditioners, it is only necessary to designate the number of installed power conditioners. The connection status with the inverter is detected, the number of inverters connected and the list of IDs is displayed, and whether there are any problems with the inverter connection or ID assignment Can be determined. Thereby, at the time of the initial setting of the monitor device, the contractor can simply and surely complete the connection setting with the power conditioner only by specifying the number of installed power conditioners.

  Furthermore, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent requirements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the above embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and is described in the column of the effect of the invention. In the case where a certain effect can be obtained, a configuration from which this configuration requirement is deleted can be extracted as an invention. Furthermore, the constituent elements over different embodiments may be appropriately combined.

  As described above, the photovoltaic power generation monitoring system according to the present invention is useful when the number of power conditioners is increased, and is particularly suitable for a photovoltaic power generation monitoring system having a measuring device for obtaining power generated by a solar battery. ing.

  DESCRIPTION OF SYMBOLS 1 Solar cell array, 2 Power conditioner, 3 System power supply, 5 Output line, 6 Measuring apparatus, 7 Solar power generation system monitor apparatus, 8 Communication line, 9 Current sensor for detecting buying and selling electric power, 10 Power line, 20 Distribution board, 21 ID setting means, 30, 31, 32, 33, 34 Branch breaker, 41, 42 Electrical equipment, 61 Power conditioner detection means, 71 Power conditioner installation number designation means, 72 Detection request means, 73 Power conditioner setting status Determination means, 74 Determination result display means, 75 Input / output unit.

Claims (4)

A measuring device connected to a plurality of power conditioners for converting DC power generated by the solar cell into AC power, and obtaining power generated by the solar cell, and communicating with the measuring device and displaying the generated power on a display screen A solar power generation monitor system, and a solar power generation monitor system comprising:
The power conditioner includes an identifier setting unit that sets an identifier for the power conditioner.
The measuring device includes power conditioner detection means for acquiring the number of connected inverters connected to the measuring device and the identifier.
The solar power generation system monitoring device is
Installation number designation means for receiving the number of installed inverters designated by the user;
Power conditioner setting status determination means for determining whether the number of installed units and the number of connected units match and whether or not the identifier is duplicated;
A determination result display means for displaying a message on the display screen based on the determination result by the inverter setting status determination means;
A photovoltaic power generation monitor system comprising: The photovoltaic power generation monitoring system according to claim 1, wherein the determination result display means displays the number of connected units and the identifier on the display screen together with the message. The determination result display means prompts the user to correct the installed number or the identifier when the installed number and the connected number do not match, or when the identifier is duplicated Is displayed on the display screen,
The power conditioner setting status determination means determines again whether or not the number of installed devices and the number of connected devices match after the correction and whether or not the identifiers are duplicated. Item 3. The photovoltaic power generation monitor system according to item 1 or 2. The solar power generation system monitoring apparatus according to claim 1, 2, or 3, wherein the solar power generation system monitoring device transmits a request for acquiring the number of connected units and the identifier to the power conditioner detection means. .

Images