KR102565851B1 - Photovoltaic module - Google Patents

Abstract

The present invention relates to a solar module. According to an embodiment of the present invention, a solar module includes a solar cell module having a plurality of solar cells and a power converter that converts DC power from the solar cell module and outputs AC power, and converts power. The device includes an inverter that converts DC power from the solar cell module into AC power, a control unit that controls the inverter, and receives power generation information from the solar cell module from the control unit, and transmits the power generation information without pairing with other external devices. , and includes a wireless communication unit that repeatedly transmits to the outside in a wireless manner. Accordingly, it is possible to conveniently perform monitoring of the solar module.

Description

Solar module {Photovoltaic module}

The present invention relates to a solar module, and more particularly, to a solar module capable of conveniently monitoring the solar module.

A photovoltaic module refers to a state in which solar cells for photovoltaic power generation are connected in series or parallel.

Meanwhile, when AC power is output from the solar module, communication with the gateway is performed through power line communication. However, for power line communication, there is an inconvenience such that the communication unit must be connected to a separate ground, and accordingly, there is a problem in that it is not easy to install the solar module.

In addition, when various types of information are transmitted to a gateway or the like by a power line communication method, there is a disadvantage in that considerable power consumption is required.

An object of the present invention is to provide a solar module capable of easily monitoring the solar module.

Meanwhile, another object of the present invention is to provide a solar module capable of transmitting generation amount information wirelessly through wireless communication rather than power line communication.

On the other hand, another object of the present invention is to provide a solar module capable of transmitting power generation information repeatedly in a wireless manner without pairing with other external devices.

A solar module according to an embodiment of the present invention for achieving the above object includes a solar cell module having a plurality of solar cells and a power converter for converting DC power from the solar cell module and outputting AC power. The power conversion device includes an inverter that converts DC power from the solar cell module into AC power, a control unit that controls the inverter, and receives power generation amount information of the solar cell module from the control unit and transfers the power generation amount information to other external sources. and a wireless communication unit for repeatedly transmitting to the outside in a wireless manner without pairing with a device.

Meanwhile, the wireless communication unit in the photovoltaic module according to an embodiment of the present invention repeatedly transmits generation amount information wirelessly at regular time intervals.

Meanwhile, the wireless communication unit in the photovoltaic module according to an embodiment of the present invention repeatedly transmits generation amount information, ID information of the photovoltaic module, AC voltage information, and DC voltage information wirelessly.

Meanwhile, the wireless communication unit in the photovoltaic module according to an embodiment of the present invention repeatedly transmits power generation information to the outside in a multicast manner.

On the other hand, the power converter in the solar module according to an embodiment of the present invention further comprises a converter for converting the level of DC power from the solar cell module, and a voltage step-down unit for stepping down the dc terminal voltage between the converter and the inverter, , The control unit operates based on the first DC power supply from the voltage step-down unit, and the wireless communication unit operates based on the second DC power supply from the voltage step-down unit.

Meanwhile, when a pairing request signal is received from an external mobile terminal, the wireless communication unit in the solar module according to an embodiment of the present invention transmits a pairing response signal corresponding to the pairing request signal and requests information from the mobile terminal. When this is received, information corresponding to the information request is transmitted to the mobile terminal between transmission timings of generation amount information that is periodically and repeatedly transmitted.

Meanwhile, when a pairing request signal is received from an external mobile terminal, the wireless communication unit in the solar module according to an embodiment of the present invention transmits a pairing response signal corresponding to the pairing request signal, and the controller controls the wireless communication unit. Through this, when firmware update information is received from the mobile terminal, based on the firmware update information, the firmware update is controlled to be performed.

Meanwhile, the wireless communication unit in the solar module according to an embodiment of the present invention wirelessly transmits power generation amount information only when the power generation amount of the solar cell module is greater than or equal to a reference value.

On the other hand, the wireless communication unit in the solar module according to an embodiment of the present invention repeatedly transmits the encrypted generation amount information to the outside in a wireless manner.

Meanwhile, the power conversion device in the solar module according to the embodiment of the present invention is disposed on the rear surface of the solar cell module.

According to an embodiment of the present invention, a solar module includes a solar cell module having a plurality of solar cells and a power converter that converts DC power from the solar cell module and outputs AC power, and converts power. The device includes an inverter that converts DC power from the solar cell module into AC power, a control unit that controls the inverter, and receives power generation information from the solar cell module from the control unit, and transmits the power generation information without pairing with other external devices. , and includes a wireless communication unit that repeatedly transmits to the outside in a wireless manner. Accordingly, it is possible to conveniently perform monitoring of the solar module.

In particular, communication power consumption can be reduced by transmitting generation amount information wirelessly through wireless communication instead of power line communication.

On the other hand, by repeatedly transmitting to the outside in a wireless manner without pairing with other external devices, it is possible to transmit generation amount information to a plurality of external devices. Accordingly, one-to-many communication or many-to-many communication is possible.

Meanwhile, the wireless communication unit in the photovoltaic module according to an embodiment of the present invention repeatedly transmits generation amount information wirelessly at regular time intervals. Accordingly, it is possible to conveniently perform monitoring of the solar module.

Meanwhile, the wireless communication unit in the photovoltaic module according to an embodiment of the present invention repeatedly transmits generation amount information, ID information of the photovoltaic module, AC voltage information, and DC voltage information wirelessly. Accordingly, it is possible to conveniently perform monitoring of the solar module.

Meanwhile, the wireless communication unit in the photovoltaic module according to an embodiment of the present invention repeatedly transmits power generation information to the outside in a multicast manner. Accordingly, generation amount information can be transmitted to a plurality of external devices.

On the other hand, the power converter in the solar module according to an embodiment of the present invention further comprises a converter for converting the level of DC power from the solar cell module, and a voltage step-down unit for stepping down the dc terminal voltage between the converter and the inverter, , The control unit operates based on the first DC power supply from the voltage step-down unit, and the wireless communication unit operates based on the second DC power supply from the voltage step-down unit. Accordingly, communication power consumption can be reduced.

Meanwhile, when a pairing request signal is received from an external mobile terminal, the wireless communication unit in the solar module according to an embodiment of the present invention transmits a pairing response signal corresponding to the pairing request signal and requests information from the mobile terminal. When this is received, information corresponding to the information request is transmitted to the mobile terminal between transmission timings of generation amount information that is periodically and repeatedly transmitted. Accordingly, information requested by the mobile terminal can be transmitted at a time point other than a regular interval.

Meanwhile, when a pairing request signal is received from an external mobile terminal, the wireless communication unit in the solar module according to an embodiment of the present invention transmits a pairing response signal corresponding to the pairing request signal, and the controller controls the wireless communication unit. Through this, when firmware update information is received from the mobile terminal, based on the firmware update information, the firmware update is controlled to be performed. Accordingly, it is possible to conveniently perform a firmware update.

Meanwhile, the wireless communication unit in the solar module according to an embodiment of the present invention wirelessly transmits power generation amount information only when the power generation amount of the solar cell module is greater than or equal to a reference value. Accordingly, it is possible to efficiently monitor the solar module.

On the other hand, the wireless communication unit in the solar module according to an embodiment of the present invention repeatedly transmits the encrypted generation amount information to the outside in a wireless manner. Accordingly, only preset external devices can receive related information.

1 is a diagram illustrating a conventional photovoltaic system.
2A is a diagram illustrating an example of a photovoltaic system including a photovoltaic module according to an embodiment of the present invention.
2B to 2D are diagrams illustrating other examples of a solar system including a solar module according to an embodiment of the present invention.
3A is a front view of a solar module according to an embodiment of the present invention.
FIG. 3B is a rear view of the solar module of FIG. 3A.
4 is an example of an internal circuit diagram of a power conversion device according to an embodiment of the present invention.
5 is another example of an internal circuit diagram of a power converter according to an embodiment of the present invention.
6 is a diagram illustrating an operating method of a solar module according to an embodiment of the present invention.
7A to 9 are diagrams referenced in the description of the operation method of FIG. 6 .

In this specification, a method capable of reducing the ripple of an input current input to a converter in a solar module is proposed.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

The suffixes "module" and "unit" for the components used in the following description are simply given in consideration of ease of writing this specification, and do not themselves give a particularly important meaning or role. Accordingly, the “module” and “unit” may be used interchangeably.

1 is a diagram illustrating a conventional photovoltaic system.

Referring to the drawing, the photovoltaic system 10x of FIG. 1 may include a solar cell module 100x, a power converter 500x, a grid 90 and a gateway 80.

Meanwhile, the solar module 50x may include a solar cell module 100x and a power converter 500x.

The solar cell module 100x may include a plurality of solar cells, convert sunlight into an electrical signal, and output a direct current voltage (Vdcx).

Meanwhile, the power converter 500x may convert the input DC voltage Vdcx into AC power Vacx and output the converted AC power Vacx.

Meanwhile, the power converter 500x may perform power line communication for communication with the gateway 80 .

Accordingly, the power conversion device 500x may transmit generation amount information and the like to the gateway 80 and receive various types of information from the gateway 80 through the power line communication method.

However, since this power line communication method requires significant power consumption, there is a disadvantage in that the power efficiency of the solar module 50x is lowered.

In addition, since the gateway 80 must separately include a power line communication unit, manufacturing cost increases.

Accordingly, the present invention proposes a method of transmitting information of a solar module to the outside by a wireless communication method rather than a power line communication method.

In particular, a method for one-to-many communication or many-to-many communication without pairing with other external devices is proposed. This will be described with reference to FIG. 2A below.

2A is a diagram illustrating an example of a photovoltaic system including a photovoltaic module according to an embodiment of the present invention.

Referring to the drawing, a photovoltaic system 10a according to an embodiment of the present invention may include a photovoltaic module 50 and a gateway 80.

The photovoltaic module 50 includes a solar cell module 100 having a plurality of solar cells, and a power conversion device 500 that converts DC power (Vdc) from the solar cell module to output AC power (Vac). can be provided.

AC power (Vac) output from the power converter 500 may be supplied to the grid 90 .

The solar cell module 100 may include a plurality of solar cells, convert sunlight into an electrical signal, and output a DC voltage (Vdc).

Meanwhile, the power conversion device 500 may convert the input DC voltage (Vdc) into AC power (Vac) and output it.

Meanwhile, the power converter 500 may perform wireless communication, not power line communication, to transmit data to the outside.

In particular, the power converter 500 may repeatedly transmit power generation information to the outside in a wireless manner without pairing with other external devices. Accordingly, monitoring of the solar module 500 can be easily performed.

In this way, power consumption information can be reduced by transmitting generation amount information wirelessly through wireless communication instead of power line communication.

On the other hand, the power conversion device 500 can transmit generation amount information to a plurality of external devices by repeatedly transmitting to the outside in a wireless manner without pairing with other external devices. Accordingly, one-to-many communication or many-to-many communication is possible.

Power generation amount information transmitted from the power converter 500 is received by a mobile terminal 600 located nearby, and the mobile terminal 600 may wirelessly transmit such information to the gateway 80.

Therefore, since the gateway 80 does not need to include a power line communication unit for power line communication, manufacturing costs and the like can be reduced.

In addition, the gateway 80 can easily obtain information on the solar module 500 through the mobile terminal 600 or the like.

2B to 2D are diagrams illustrating other examples of a solar system including a solar module according to an embodiment of the present invention.

Referring to the drawings, the photovoltaic system 10b according to the embodiment of the present invention of FIGS. 2B to 2D includes a plurality of photovoltaic modules 50a, 50b, ..., 50n and a gateway 80. can do.

Unlike FIG. 2A, in the other photovoltaic system 10b, a plurality of photovoltaic modules 50a, 50b, ..., 50n are connected in parallel to each other, and a plurality of photovoltaic modules 50a, 50b, ... ,50n) can output each AC power.

The plurality of photovoltaic modules 50a, 50b, ..., 50n include a plurality of solar cell modules 100a, 100b, ..., 100n, and each solar cell module 100a, 100b, ..., 100n ) may be provided with power converters 500a, 500b, ..., 500n disposed on the rear surface.

The plurality of power converters 500a, 500b, ..., 500n may output AC power, respectively. AC power output from each of the plurality of power converters 500a, 500b, ..., 500n may be supplied to the grid 90.

Meanwhile, the plurality of power converters 500a, 500b, ..., 500n may perform wireless communication, not power line communication, to transmit data to the outside.

In particular, the plurality of power converters 500a, 500b, ..., 500n may repeatedly transmit power generation information to the outside in a wireless manner without pairing with other external devices. Accordingly, it is possible to conveniently perform monitoring of the plurality of photovoltaic modules 50a, 50b, ..., 50n.

In this way, power consumption information can be reduced by transmitting generation amount information wirelessly through wireless communication instead of power line communication.

On the other hand, the plurality of power converters 500a, 500b, ..., 500n can transmit generation amount information to a plurality of external devices by repeatedly transmitting to the outside in a wireless manner without pairing with other external devices. there will be Accordingly, one-to-many communication or many-to-many communication is possible.

Power generation amount information, etc. transmitted from the plurality of power converters 500a, 500b, ..., 500n is received by the mobile terminal 600 located in the vicinity, and the mobile terminal 600 transmits such information to the gateway. (80) can be transmitted wirelessly.

FIG. 2B illustrates a case where the mobile terminal 600 is located near an n-th photovoltaic module 50n among a plurality of photovoltaic modules 50a, 50b, ..., 50n.

Accordingly, the mobile terminal 600 receives information from the n-th power converter 500n among the plurality of power converters 500a, 500b, ..., 500n, and transmits the received information to the gateway 80. can be sent to

2C illustrates a case in which the mobile terminal 600 is located near a second solar module 50b among a plurality of solar modules 50a, 50b, ..., 50n.

Accordingly, the mobile terminal 600 receives information from the second power converter 500b among the plurality of power converters 500a, 500b, ..., 500n, and transmits the received information to the gateway 80. can be sent to

FIG. 2D illustrates a case where the mobile terminal 600 is located near a first solar module 50a among a plurality of solar modules 50a, 50b, ..., 50n.

Accordingly, the mobile terminal 600 receives information from the first power converter 500a among the plurality of power converters 500a, 500b, ..., 500n, and transmits the received information to the gateway 80. can be sent to

As such, since information on the plurality of photovoltaic modules 50a, 50b, ..., 50n can be received through the mobile terminal 600, the plurality of photovoltaic modules 50a, 50b, ..., 50n) can be easily monitored.

Therefore, since the gateway 80 does not need to include a power line communication unit for power line communication, manufacturing costs and the like can be reduced.

3A is a front view of a solar module according to an embodiment of the present invention, and FIG. 3B is a rear view of the solar module of FIG. 3A.

Referring to the drawings, a solar module 50 according to an embodiment of the present invention may include a solar cell module 100 and a junction box 200 positioned on a rear surface of the solar cell module 100 .

The junction box 200 may include a power converter 500 that performs power conversion.

Meanwhile, the power converter 500 may include at least one bypass diode that is bypassed in order to prevent a hot spot in the case of a shadow.

4 and the like illustrate that three bypass diodes (Da, Db, and Dc in FIG. 4 ) are provided corresponding to the four solar cell strings in FIG. 3 .

Meanwhile, the power converter 500 in the junction box 200 may convert DC power supplied from the solar cell module 100 . This will be described with reference to FIG. 4 below.

Meanwhile, the solar cell module 100 may include a plurality of solar cells.

In the drawing, a plurality of solar cells are connected in a row by a ribbon to form a solar cell string 140. Accordingly, six strings 140a, 140b, 140c, 140d, 140e, and 140f are formed, and each string includes 10 solar cells. Meanwhile, unlike the drawings, various modifications are possible.

Meanwhile, each solar cell string may be electrically connected by a bus ribbon. FIG. 3 shows that the first solar cell string 140a and the second solar cell string 140b are connected by the bus ribbons 145a, 145c, and 145e disposed under the solar cell module 100, respectively, in the third aspect. The cell string 140c and the fourth solar cell string 140d are electrically connected to each other, and the fifth solar cell string 140e and the sixth solar cell string 140f are electrically connected.

In addition, FIG. 3 shows that the second solar cell string 140b and the third solar cell string 140c are connected by the bus ribbons 145b and 145d disposed above the solar cell module 100, respectively, in the fourth aspect. It is exemplified that the cell string 140d and the fifth solar cell string 140e are electrically connected.

Meanwhile, the ribbon connected to the first string, the bus ribbons 145b and 145d, and the ribbon connected to the fourth string are electrically connected to first to fourth conductive lines (not shown), respectively, and the first to fourth 4 conductive lines (not shown) are bypass diodes in the junction box 200 (Da, Db, Dc in FIG. ) can be connected.

At this time, the opening formed in the solar cell module 100 may be formed corresponding to an area where the junction box 200 is located.

4 is an example of an internal circuit diagram of a power conversion device according to an embodiment of the present invention.

Referring to the drawing, the power converter 500 in the junction box 200 may convert DC power from the solar cell module 100 and output the converted power.

To this end, the power converter 500 may include a converter 530, an inverter 540, a control unit 550 for controlling them, and a wireless communication unit 580.

In addition, the power converter 500 may further include a bypass diode unit 510 for bypassing, a capacitor unit 520 for storing DC power, and a filter unit 570 for filtering output AC power. can

Meanwhile, the power converter 500 includes an input current detector (A), an input voltage detector (B), a converter output current detector (C), a converter output voltage detector (D), an inverter output current detector (E), and an inverter output A voltage detector (F) may be further provided.

Meanwhile, the controller 550 may control the converter 530 and the inverter 540 .

The bypass diode unit 510 may include bypass diodes Dc, Db, and Da respectively disposed between the first to fourth conductive lines (not shown) of the solar cell module 100. . At this time, the number of bypass diodes is one or more, and preferably one smaller than the number of conductive lines.

The bypass diodes Dc, Db, and Da receive solar DC power from the solar cell module 100, in particular, from first to fourth conductive lines (not shown) in the solar cell module 100. In addition, the bypass diodes Dc, Db, and Da may be bypassed when a reverse voltage is generated in the DC power supply from at least one of the first to fourth conductive lines (not shown).

Meanwhile, DC power that has passed through the bypass diode unit 510 may be input to the capacitor unit 520 .

The capacitor unit 520 may store input DC power input through the solar cell module 100 and the bypass diode unit 510 .

Meanwhile, in the drawing, the capacitor unit 520 is illustrated as having a plurality of capacitors Ca, Cb, and Cc connected in parallel to each other, but, unlike this, a plurality of capacitors are connected in series-parallel mixture or grounded in series. It is also possible to connect to the terminal. Alternatively, it is also possible that the capacitor unit 520 includes only one capacitor.

The converter 530 may convert the level of the input voltage from the solar cell module 100 through the bypass diode unit 510 and the capacitor unit 520 .

In particular, the converter 530 may perform power conversion using DC power stored in the capacitor unit 520 .

Meanwhile, the converter 530 according to an embodiment of the present invention will be described in more detail with reference to FIG. 6 .

Meanwhile, switching elements in the converter 530 may be turned on/off based on a converter switching control signal from the control unit 550 . As a result, level-converted DC power may be output.

The inverter 540 may convert the DC power converted by the converter 530 into AC power.

In the drawing, a full-bridge inverter is exemplified. That is, the upper and lower arm switching elements (S1 and S3) and the lower arm switching elements (S2 and S4) connected in series with each other form a pair, and a total of two pairs of upper and lower arm switching elements are parallel to each other (S1, S2, S3 and S4) connected to Diodes may be connected in anti-parallel to each of the switching elements SW1 to SW4.

The switching elements SW1 to SW4 in the inverter 540 may be turned on/off based on an inverter switching control signal from the control unit 550 . As a result, AC power having a predetermined frequency can be output. Preferably, it has the same frequency as the alternating current frequency of the grid (approximately 60 Hz or 50 Hz).

Meanwhile, the capacitor C may be disposed between the converter 530 and the inverter 540.

The capacitor C may store the level-converted DC power of the converter 530 . Meanwhile, both ends of the capacitor C may be referred to as a dc terminal, and accordingly, the capacitor C may be referred to as a dc terminal capacitor.

Meanwhile, the input current detector A may detect the input current ic1 supplied from the solar cell module 100 to the capacitor unit 520 .

Meanwhile, the input voltage detector B may detect the input voltage Vc1 supplied from the solar cell module 100 to the capacitor unit 520 . Here, the input voltage Vc1 may be the same as the voltage stored across the capacitor unit 520 .

The sensed input current ic1 and input voltage vc1 may be input to the controller 550 .

Meanwhile, the converter output current detection unit (C) detects the output current (ic2) output from the converter 530, that is, the dc stage current, and the converter output voltage detection unit (D) detects the output voltage output from the converter 530. (vc2), i.e. detect the dc terminal voltage. The detected output current ic2 and output voltage vc2 may be input to the controller 550 .

Meanwhile, the inverter output current detection unit E detects the current ic3 output from the inverter 540, and the inverter output voltage detection unit F detects the voltage vc3 output from the inverter 540. The detected current ic3 and voltage vc3 are input to the controller 550 .

Meanwhile, the controller 550 may output a control signal Scc for controlling the switching elements of the converter 530 . In particular, the controller 550 controls at least one of the detected input current ic1, input voltage vc1, output current ic2, output voltage vc2, output current ic3, or output voltage vc3. Based on this, turn-on timing signals of the switching elements in the converter 530 may be output.

Meanwhile, the control unit 550 may output an inverter control signal Sic for controlling each switching element SW1 to SW4 of the inverter 540 . In particular, the controller 550 controls at least one of the detected input current ic1, input voltage vc1, output current ic2, output voltage vc2, output current ic3, or output voltage vc3. Based on this, a turn-on timing signal of each switching element SW1 to SW4 of the inverter 540 may be output.

Meanwhile, the controller 550 may calculate a maximum power point for the solar cell module 100 and, accordingly, control the converter 530 to output DC power corresponding to the maximum power.

Meanwhile, the filter unit 570 may be disposed at an output terminal of the inverter 540 .

The filter unit 570 includes a plurality of passive elements, and the phase difference between the AC current io and the AC voltage vo output from the inverter 540 is based on at least some of the plurality of passive elements. can be adjusted.

Meanwhile, a first cable 31 connected to a grid cable may be electrically connected to an output terminal of the filter unit 570 .

Meanwhile, the wireless communication unit 580 may receive power generation information of the solar cell module 100 from the fisherman 550 and repeatedly transmit the power generation information to the outside in a wireless manner without pairing with other external devices. . Accordingly, monitoring of the solar module 500 can be easily performed.

In particular, communication power consumption can be reduced by transmitting generation amount information wirelessly through wireless communication instead of power line communication.

On the other hand, by repeatedly transmitting to the outside in a wireless manner without pairing with other external devices, it is possible to transmit generation amount information to a plurality of external devices. Accordingly, one-to-many communication or many-to-many communication is possible.

Meanwhile, the wireless communication unit 580 repeatedly transmits power generation amount information wirelessly at regular time intervals. Accordingly, it is possible to conveniently perform monitoring of the solar module.

Meanwhile, the wireless communication unit 580 repeatedly transmits generation amount information, photovoltaic module ID information, AC voltage information, and DC voltage information wirelessly. Accordingly, it is possible to conveniently perform monitoring of the solar module.

Meanwhile, the wireless communication unit 580 repeatedly transmits power generation amount information to the outside in a multicast manner. Accordingly, generation amount information can be transmitted to a plurality of external devices.

Meanwhile, when a pairing request signal is received from the external mobile terminal 600, the wireless communication unit 580 transmits a pairing response signal corresponding to the pairing request signal and receives the information request from the mobile terminal 600. In this case, information corresponding to the information request is transmitted to the mobile terminal 600 between transmission timings of generation amount information that is periodically and repeatedly transmitted. Accordingly, information requested by the mobile terminal 600 can be transmitted at a time point other than a regular interval.

Meanwhile, when a pairing request signal is received from the external mobile terminal 600, the wireless communication unit 580 transmits a pairing response signal corresponding to the pairing request signal, and the control unit 550, the wireless communication unit 580 When firmware update information (Inf_firm) is received from the mobile terminal 600 through , based on the firmware update information (Inf_firm), the firmware update is controlled to be performed. Accordingly, it is possible to conveniently perform a firmware update.

Meanwhile, the wireless communication unit 580 wirelessly transmits power generation amount information only when the power generation amount of the solar cell module 100 is greater than or equal to a reference value. Accordingly, it is possible to efficiently monitor the solar module.

Meanwhile, the wireless communication unit 580 repeatedly transmits the encrypted generation amount information to the outside in a wireless manner. Accordingly, only preset external devices can receive related information.

Meanwhile, the wireless communication unit 580 may perform low power based Bluetooth (BLE) communication.

5 is another example of an internal circuit diagram of a power converter according to an embodiment of the present invention.

Referring to the drawings, a power converter 500 according to an embodiment of the present invention includes a converter 530 that converts the level of DC power from a solar cell module and a voltage Vdc at both ends of the converter 530. The DC terminal capacitor (C) to store, the inverter 540 that converts the voltage (Vdc) at both ends of the converter 530 into AC power and outputs it, and the dc terminal voltage between the converter 530 and the inverter 540 ( A voltage step-down unit 595 for stepping down Vdc, a controller 550 for controlling the converter 530 and the inverter 550, and a wireless communication unit 580 for performing wireless communication may be provided.

The voltage step-down unit 595 may step down the dc link voltage Vdc to output the first DC power supply Vdc1 and the second DC power supply Vdc2.

The control unit 550 may operate based on the first DC power supply Vdc1 from the voltage step-down unit 595, and the wireless communication unit 580 may operate based on the second DC power supply from the voltage step-down unit 595 ( Based on Vdc2), it can operate.

At this time, it is preferable that the level of the second DC power supply (Vdc2) is lower than that of the first DC power supply (Vdc1). Accordingly, the wireless communication unit 580 is driven with low power.

6 is a diagram illustrating an operating method of a solar module according to an embodiment of the present invention, and FIGS. 7A to 9 are diagrams referenced in the description of the operating method of FIG. 6 .

First, referring to FIG. 6 , the wireless communication unit 580 of the solar module 500 wirelessly transmits solar module information Inf repeatedly at regular time intervals (S610). Accordingly, the mobile terminal 600 may wirelessly receive the solar module information Inf (S612).

Here, the photovoltaic module information (Inf) includes ID information (Infsa) of the photovoltaic module, current power generation information (Infsb), 1-hour power generation information (Infsc), 1 day power generation information (Infsd), 1 as shown in FIG. 7B. Weekly power generation information (Infse), monthly power generation information (Infsf), total cumulative power generation information (Infsg), AC voltage information (Infsh), AC frequency information (Infsi), DC voltage information (Infsj), inverter status information (Infsk) etc. may be included.

Meanwhile, the wireless communication unit 580 wirelessly transmits power generation amount information only when the power generation amount of the solar cell module 100 is greater than or equal to a reference value. Accordingly, it is possible to efficiently monitor the solar module.

Accordingly, the wireless communication unit 580 may not transmit the solar module information Inf of FIG. 7B when the amount of power generated by the solar cell module 100 is less than the reference value.

Alternatively, when the amount of power generation of the solar cell module 100 is less than the reference value, the wireless communication unit 580 transmits only the ID information (Infsa) of the photovoltaic module in the photovoltaic module information (Inf) of FIG. 7B and transmits Infsb to Infsk may not transmit.

Alternatively, the wireless communication unit 580, when the amount of power generation of the solar cell module 100 is less than the reference value, ID information (Infsa) of the photovoltaic module in the photovoltaic module information (Inf) of FIG. 7B, AC voltage information (Infsh), Only AC frequency information (Infsi), DC voltage information (Infsj), and inverter state information (Infsk) may be transmitted, and Infsb to Infsg may not be transmitted.

Next, the mobile terminal 600 may transmit the received photovoltaic module information Inf to the gateway 80 (S614).

Meanwhile, the wireless communication unit 580 of the present invention may repeatedly transmit power generation amount information to the outside in a multicast manner. Accordingly, one-to-many communication or many-to-many communication may be possible.

Meanwhile, at times ta, 2ta, 3ta, and 4ta of FIG. 7A, the wireless communication unit 580 of the solar module 500 periodically transmits solar module information (Infa, Infb, Infc, and Infd), respectively, It is exemplified that the mobile terminal 600 receives them respectively. Accordingly, monitoring of the solar module 500 can be easily performed.

In particular, since power generation information is included in the solar module information (Infa, Infb, Infc, Infd), it is possible to conveniently monitor the power generation of the solar module 500.

Meanwhile, the wireless communication unit 580 of the present invention can support a unicast method as well as a multicast method. That is, through pairing with the mobile terminal 600, one-to-one communication is also possible.

The mobile terminal 600 may transmit a pairing request signal (S620), and the wireless communication unit 580 of the solar module 500 receives the pairing request signal (S622) and transmits a pairing response signal in response thereto. (S625), and the mobile terminal 600 may receive a pairing response signal (S622). Accordingly, pairing may be completed between the wireless communication unit 580 of the solar module 500 and the mobile terminal 600 .

Meanwhile, after completion of pairing, the mobile terminal 600 may transmit a specific information request (S630), and the wireless communication unit 580 of the photovoltaic module 500 receives the specific information request (S632) and responds thereto. and transmits information (S635), and the mobile terminal 600 can receive the information (S637).

7A , at a time point of 3ta+Tb, a pairing request signal (Pair_req) and a pairing response signal (Pair_res) are transmitted, pairing is performed, and at a time point of 3ta+Tc, an information request (Inf1_req) is sent to the wireless communication unit 580. is received at 3ta+Td, and corresponding information Inf1 is transmitted to the wireless communication unit 580 at time point 3ta+Td.

Accordingly, information on the photovoltaic module 500 can be conveniently acquired through the mobile terminal 600 on an irregular basis.

8a to 8c illustrate that many-to-many communication is performed between a plurality of photovoltaic modules 50a, 50b, 50c, ... and a plurality of mobile terminals 600a, 600b, 600c, ... .

A plurality of photovoltaic modules (50a, 50b, 50c, ...) can transmit photovoltaic module information repeatedly at regular time intervals, and a plurality of mobile terminals (600a, 600b, 600c, ...) , information of each solar module may be received.

First, as shown in FIG. 8A, at a time point Ta, a plurality of solar modules 50a, 50b, 50c, ... transmit solar module information (Infa1, Infa2, Infa3, ...), and thus Accordingly, the plurality of mobile terminals 600a, 600b, 600c, ... may receive the respective solar module information (Infa1, Infa2, Infa3, ...).

Next, as shown in FIG. 8B, at the time point Tb, the plurality of solar modules 50a, 50b, 50c, ... transmit solar module information (Infb1, Infb2, Infb3, ...), and thus Accordingly, the plurality of mobile terminals 600a, 600b, 600c, ... may receive the respective solar module information (Infb1, Infb2, Infb3, ...).

Next, as shown in FIG. 8C, at the time point Tc, the plurality of solar modules 50a, 50b, 50c, ... transmit solar module information (Infc1, Infc2, Infc3, ...), and thus Accordingly, the plurality of mobile terminals 600a, 600b, 600c, ... may receive the respective solar module information (Infc1, Infc2, Infc3, ...).

Accordingly, according to the many-to-many communication, the plurality of mobile terminals 600a, 600b, 600c, ... can periodically obtain information on a plurality of solar modules.

9 illustrates transmission of firmware update information (Inf_firm) from the mobile terminal 600 .

Referring to the drawing, the wireless communication unit 580 of the power converter 500 in the solar module 50 may receive firmware update information Inf_firm.

And, the firmware update information (Inf_firm) may be delivered to the control unit 550 within the power converter 500.

When firmware update information (Inf_firm) is received from the mobile terminal 600 through the wireless communication unit 580, the control unit 550 of the power converter 500, based on the firmware update information (Inf_firm), You can control when updates are performed. Accordingly, using the wireless communication unit 580, it is possible to simply update the firmware.

The solar module according to the present invention is not limited to the configuration and method of the embodiments described above, but all or part of each embodiment is selectively combined so that various modifications can be made. may be configured.

In addition, although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific embodiments described above, and the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. Of course, various modifications are possible by those skilled in the art, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

Claims (10)

A solar cell module having a plurality of solar cells;
A power conversion device that converts DC power from the solar cell module and outputs AC power;
The power conversion device,
an inverter that converts DC power from the solar cell module into AC power;
a control unit controlling the inverter; and
A wireless communication unit that receives information on the amount of power generation of the solar cell module from the control unit and repeatedly transmits the information on the amount of power generation to the outside in a wireless manner without pairing with other external devices,
The power conversion device,
a converter for converting a level of DC power from the solar cell module;
Further comprising a voltage stepping unit for stepping down the dc terminal voltage between the converter and the inverter;
Based on the first DC power from the voltage step-down unit, the control unit operates,
Based on the second DC power from the voltage step-down unit, the wireless communication unit operates,
The second DC power source is smaller than the first DC power source. Features solar modules. A solar cell module having a plurality of solar cells;
A power conversion device that converts DC power from the solar cell module and outputs AC power;
The power conversion device,
an inverter that converts DC power from the solar cell module into AC power;
a control unit controlling the inverter; and
A wireless communication unit that receives information on the amount of power generation of the solar cell module from the control unit and repeatedly transmits the information on the amount of power generation to the outside in a wireless manner without pairing with other external devices,
The wireless communication unit,
Only when the amount of power generated by the solar cell module exceeds the reference value, the information on the amount of power generation is transmitted wirelessly;
The solar module characterized in that only ID information is transmitted when the amount of power generated by the solar cell module is less than a reference value. A solar cell module having a plurality of solar cells;
A power conversion device that converts DC power from the solar cell module and outputs AC power;
The power conversion device,
an inverter that converts DC power from the solar cell module into AC power;
a control unit controlling the inverter; and
A wireless communication unit that receives information on the amount of power generation of the solar cell module from the control unit and repeatedly transmits the information on the amount of power generation to the outside in a wireless manner without pairing with other external devices,
The wireless communication unit,
A solar module characterized in that the encrypted power generation information is repeatedly transmitted to the outside in a wireless manner. According to any one of claims 1 to 3,
The wireless communication unit,
The solar module, characterized in that repeatedly transmitting the power generation amount information wirelessly at regular time intervals.
According to any one of claims 1 to 3,
The wireless communication unit,
The photovoltaic module characterized in that the power generation information, ID information of the photovoltaic module, AC voltage information, and DC voltage information are repeatedly transmitted wirelessly.
According to any one of claims 1 to 3,
The wireless communication unit,
The solar module characterized in that the power generation information is repeatedly transmitted to the outside in a multicast method.
According to any one of claims 1 to 3,
The wireless communication unit,
When a pairing request signal is received from an external mobile terminal, a pairing response signal corresponding to the pairing request signal is transmitted;
The solar module characterized in that when an information request is received from the mobile terminal, information corresponding to the information request is transmitted to the mobile terminal between transmission timings of power generation amount information that is periodically and repeatedly transmitted. According to any one of claims 1 to 3,
The wireless communication unit,
When a pairing request signal is received from an external mobile terminal, a pairing response signal corresponding to the pairing request signal is transmitted;
The control unit,
The solar module characterized in that when firmware update information is received from the mobile terminal through the wireless communication unit, based on the firmware update information, control to perform a firmware update. According to any one of claims 1 to 3,
The solar module, characterized in that the power conversion device is disposed on the rear surface of the solar cell module. delete

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