KR101077748B1 - Solar power generation information display apparatus for solar power generation system - Google Patents

Abstract

The present invention relates to a power generation display device for a photovoltaic power generation system to display the power generation amount of the photovoltaic power generation system so as to be easily identified.

According to an aspect of the present invention, there is provided a power generation display device of a solar power generation system for supplying power generated from a solar cell to a plurality of loads through a power converter, the apparatus comprising: a first communication unit configured to receive power conversion information from the power converter in real time; A generation amount calculator configured to calculate a generation amount using the received power conversion information; A control unit controlling a display unit to be described later according to the calculated power generation amount; And a display unit for displaying the calculated amount of power generated by the control signal of the controller so as to be distinguished according to the degree. It provides a power generation display device of the solar power system comprising a.

Solar power, power generation, power converter, power generation, surplus power generation, solar cell

Description

SOLAR POWER GENERATION INFORMATION DISPLAY APPARATUS FOR SOLAR POWER GENERATION SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power generation display device of a solar power generation system, and more particularly, to a power generation display device of a photovoltaic power generation system for displaying the power generation amount of a solar power generation system so as to be easily identified at home.

The photovoltaic system is a system that directly converts sunlight into electrical energy using solar cells without the aid of a generator. In general, the photovoltaic power generation system is composed of a solar cell, a storage battery, and a power converter. Photovoltaic systems have attracted much attention recently because they are free from pollution, can be generated only as needed where needed, and are easy to maintain.

The photovoltaic power generation system converts DC power generated by using a solar cell into AC power through a power converter to supply various loads such as homes and businesses. Homes and businesses use the power generated by the solar power generation system, and if there is not enough power, they can use commercial power supplied by the utility company. In the case of such a photovoltaic power generation system, if the power generation state can be easily and accurately checked, the photovoltaic power generation system can be efficiently operated and energy can be efficiently used according to the amount of power generation.

However, in the conventional photovoltaic system, only the photovoltaic power or commercial power is displayed. Therefore, since only power generation information of the current state is known and power generation amount is not displayed, it is not possible to confirm whether or not surplus power generation has occurred or power generation shortage. As in overseas cases, it is very likely that a customer will build a system that sells the surplus generation generated from the solar power generation system to the power market, so the customer needs to check whether the surplus generation occurs. If the status of power generation can be easily displayed in real time, solar power can be supplied in a timely manner when the purchase price is high, thereby enabling economic operation.

However, in the related art, there is a problem that the user cannot use the generated power in a timely manner since only a display of only what kind of power generation is being performed and a technology for directly displaying the amount of photovoltaic power generation are not proposed.

In addition, in the conventional photovoltaic power generation system, since it is not possible to determine how much power generation, it is not possible to determine how much surplus power or how much power is insufficient, so that energy cannot be used efficiently and passively induce energy saving. Is holding.

Accordingly, in the technical field, there has been a demand for the development of a technology that can easily display the amount of power generated by the photovoltaic power generation system and allow the user to easily and quickly check the amount of power generated at home.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a power generation display device of a photovoltaic power generation system, which displays the amount of photovoltaic power generation in a photovoltaic power generation system in real time so as to easily identify the home.

The present invention for achieving the above object,

An apparatus for displaying power generation in a photovoltaic power generation system that supplies power generated from a solar cell to a plurality of loads through a power converter, the apparatus comprising: a first communication unit configured to receive power conversion information from the power converter in real time; A generation amount calculator configured to calculate a generation amount using the received power conversion information; A control unit controlling a display unit to be described later according to the calculated power generation amount; And a display unit for displaying the calculated amount of power generated by the control signal of the controller so as to be distinguished according to the degree. It provides a power generation display device of the solar power system comprising a.

In an embodiment of the present disclosure, the first communication unit receives power conversion information using any one of the power converter and wired or wireless communication.

In an embodiment of the present disclosure, the display unit displays the calculated power generation amount by dividing the calculated power generation into a plurality of preset stages according to the degree of size.

In this case, the display unit preferably includes a light emitting diode (LED) for emitting a plurality of colors distinguished from each other according to the calculated amount of power generation.

In addition, the display unit may display the calculated power generation amount numerically in each step.

The display unit may display the calculated power generation amount as any one selected from among a predetermined reference amount, a reference amount, and a reference amount or more.

In an embodiment of the present disclosure, the display unit may be formed in an electrical outlet for using power generated in the photovoltaic power generation system to display the amount of power generated outside.

In an embodiment of the present disclosure, the display unit may be implemented as a detachable plug that can be connected to and disconnected from a power line between the power converter and a load to display the power generation to the outside.

In an embodiment of the present invention, the power generation display device includes a second communication unit for receiving power consumption measurement information of the load from the outside; And a surplus generation amount calculation unit calculating surplus generation amount by using the generation amount calculated by the generation amount calculation unit and the power consumption of the received load; In this case, the display unit displays the surplus power generation amount according to the degree by the control signal of the control unit, respectively.

In this case, the display unit displays the calculated surplus power generation amount into a plurality of preset stages according to the degree of size.

In this case, the display unit displays the surplus power generation amount as one selected from the preset reference amount, the reference amount, and the reference amount or more.

In this case, the display unit preferably includes a light emitting diode (LED) for emitting a plurality of colors distinguished from each other according to the size of the surplus power generation.

According to the present invention, the amount of power generated in the solar power generation system can be easily and conveniently checked at home.

In addition, according to the present invention by distinguishing the degree of the photovoltaic power generation amount, the user can determine the excess or shortage of the power generation amount.

In addition, according to the present invention, it is possible to sell power in a timely manner in the power market because the amount of power generated in the photovoltaic system can be confirmed in real time.

Furthermore, according to the present invention, since information on the amount of photovoltaic power generation is possible in real time, the photovoltaic power generation system can be efficiently operated and energy can be efficiently used.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the present invention, detailed descriptions of well-known functions or configurations will be omitted when it is determined that the detailed descriptions may unnecessarily obscure the subject matter of the present invention.

1 is a block diagram illustrating a power generation display device of a solar power generation system according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the power generation display device 100 according to an exemplary embodiment of the present invention includes a first communication unit 110, a power generation unit 120, a controller 130, and a display unit 140. In another embodiment of the present invention, the power generation display device 100 may further include a second communication unit 150 and a surplus power generation calculator 160.

The photovoltaic system 10 to which the power generation display device 100 of the present invention is applied provides the DC power generated by using the solar cell 11 to the power converter 12, and the power converter 12 is DC. The power is converted into AC power and supplied to the plurality of loads 13. In this case, the power consumption of the plurality of loads 14 is measured by the power consumption measuring device 14. The power consumption measuring device 14 may use, for example, a conventional power meter.

The solar cell 11 is constructed by joining a P-type semiconductor and an N-type semiconductor. When sunlight is irradiated on the solar cell 101, holes and electrons are generated in the solar cell 11 by the energy of the sunlight. At this time, holes move toward the P-type semiconductor, electrons move to the N-type semiconductor, and when a potential difference occurs, current flows. The power generated through this process is provided to the plurality of loads 13 through the power converter 12.

The first communication unit 110 communicates with the power converter 12. Such communication may use any one selected from wired or wireless communication. To this end, the power converter 12 is provided with a wired or wireless communication module for performing wired or wireless communication with the first communication unit 110. In particular, the first communication unit 110 according to the present invention receives the conversion information of the power generated in the photovoltaic system 10 from the power converter 12 in real time. That is, the power converter 12 grasps the power conversion information when converting the DC power generated from the solar cell 11 to AC power, and converts the power conversion information through a wired / wireless communication module (not shown). It is to transmit in real time to 110.

The generation amount calculator 120 calculates the amount of generation of the solar power generation system 10 in real time using the power conversion information transmitted from the power converter 12 through the first communication unit 110. As a result, it is possible to determine how much power is generated in the photovoltaic system.

The controller 130 controls and manages an overall operation of the power generation display device 100 of the present invention. In particular, the controller 130 controls the display on the display unit 140, which will be described later, according to the amount of power calculated by the generation amount calculating unit 120, and controls to display the calculated amount of power generation differently according to the magnitude of the size.

The display unit 140 operates by the control signal of the controller 130 and displays the calculated amount of power generation so as to be distinguished according to the degree. The display unit 140 may be installed at any place that can be easily identified by the user. For example, the display unit 140 may be installed in the home so that the user can check the home. As a result, the power generation amount of solar light is distinguished from each other through the display unit 140 so that the user can easily check the power generation amount.

On the other hand, the second communication unit 150 receives the usage information of the power used in the plurality of loads 13 from the power consumption measuring device 14. Similar to the first communication unit 110, the second communication unit 150 also receives power usage information from the power consumption measuring device 14 using either wired communication or wireless communication. To this end, the power consumption measuring device 14 includes a wired / wireless communication module (not shown) for performing wired / wireless communication with the second communication unit 150.

The surplus generation calculation unit 160 is responsible for calculating the surplus generation amount using the power generation amount calculated by the generation amount calculating unit 120 and the power consumption of the load 13 received through the second communication unit 150. Such surplus power generation can be obtained, for example, by generating power minus power consumption. Therefore, the surplus generation amount may have any one of + value, 0 or-value. A positive value means that the power is left when the amount of power generation is greater than the power consumption, and a negative value means that power is insufficient to supply the load 13 when the amount of power generation is less than the power consumption.

In this case, the controller 130 may further perform a function of controlling the display on the display unit 140 according to the amount of surplus power generation calculated by the surplus power generation calculator 160. That is, the controller 130 controls the display on the display unit 140 according to the surplus generation amount calculated by the surplus generation amount calculation unit 160, and controls to display the calculated surplus generation amount separately according to the degree. As a result, the display unit 140 further performs a function of displaying the surplus power generation amount calculated as described above by the control signal of the controller 130 to be distinguished according to the degree. Through this process, the present invention enables the user to easily check the amount of surplus generation by distinguishing and displaying the amount of surplus generation of sunlight through the display unit 140.

Through such a configuration, the power generation display device 100 of the present invention displays the power generation information and the surplus power generation information of the power generated in the solar power generation system according to the magnitude of the size, so that the current power generation state can be confirmed. The display can be checked at any place set by the user, such as in the home, so that the user can easily and conveniently grasp the power generation status in real time. In this way, the user can check timely when there is a large amount of power generation, and can sell power at the time when the selling price of the power is high, thereby taking economic benefits, and when the amount of power generation is small, the user can increase the energy use efficiency by adjusting the load. have.

2 is an exemplary embodiment of a display unit of a power generation display according to an embodiment of the present invention, and FIG. 3 is an example of an implementation of a display unit of a power generation display according to another embodiment of the present invention.

Referring to the exemplary embodiment illustrated in FIG. 2, the display unit 140 according to the present invention may be formed in an electrical outlet 20 for using power generated in the photovoltaic system 10. It is important that the display unit 140 displays power generation in different stages to be distinguished from each other. In the embodiment of FIG. 2 (a), the display unit 140 has different colors according to power generation using a plurality of light emitting diodes (LEDs). A plurality of LEDs are implemented to emit light, and in the embodiment of FIG. 2 (b), the amount of power generated is directly displayed as a numerical value. Such numerical value is preferably displayed digitally.

Referring to another embodiment illustrated in FIG. 3, the display unit 140 according to the present invention has a detachable form that can be connected to and disconnected from a power line between the power converter 12 and the load 13 of the photovoltaic system 10. It may be implemented as a plug 30. Herein, it is important that the display unit 140 divides the amount of power generation into a plurality of stages so as to be distinguished from each other. In the exemplary embodiment of FIG. It is expressed numerically.

In the embodiment of the display unit 140, as with the amount of power generation, the amount of surplus power generation may be displayed in different stages by being divided into a plurality of stages according to the magnitude of the size.

 Meanwhile, in the preferred embodiment of the present invention, the power generation amount may be displayed in three stages, that is, below the reference amount or the reference amount or less than the preset reference amount. In this case, for example, the reference amount may be displayed in red, the reference amount may be green, and the reference amount may be displayed in blue. Here, the configuration for implementing the display unit 140 on the electrical outlet 20 and the plug 30 to display the amount of power generation can be easily implemented by those skilled in the art, so a detailed description thereof will be omitted.

By implementing the display unit 140 through these implementations, the user can easily and simply check the amount of power generation or surplus power generation in the home. The display unit 140 according to this embodiment may be installed at any place that can be easily identified by the user as well as the home.

4 is a flowchart illustrating an operation of a power generation display device according to an exemplary embodiment.

In FIG. 4, for example, the degree of power generation is displayed in three stages. Referring to FIG. 4, when the power generation display device 100 according to the present invention generates power in the solar power generation system 10 (S101), any one of wired communication and wireless communication is used from the power converter 12. To receive the amount of power generation information (S103). At this time, it is determined whether the received power generation amount is larger than the preset reference amount (S105). If the power generation amount is larger than the reference amount, the first LED is turned on (S107). . Here, when the power generation amount is the same as the reference amount, the second LED is turned on (S111). When the power generation amount is not the same as the reference amount, the second LED is determined to be smaller than the reference amount (S113).

5 is a flowchart illustrating an operation of a surplus power generation display device according to another exemplary embodiment of the present invention.

In FIG. 5, for the sake of convenience of explanation, the degree of surplus power generation is displayed in three stages. Referring to FIG. 5, the power generation display device 100 according to the present invention receives power generation information from the power converter 12 of the solar power generation system 10 (S201). In addition, the power consumption information of the load 13 is received from the external power consumption measuring device 14 (S203).

Subsequently, surplus power generation amount is calculated using the received solar power generation amount and power consumption (S205). Such surplus generation can be calculated by subtracting the power consumption from the load 13 from the solar generation.

Subsequently, it is determined whether the surplus generation amount calculated in this way is larger than the preset reference amount (S207). If the surplus generation amount is larger than the reference amount, the first LED is turned on (S209). If the surplus generation amount is smaller than the reference amount, the surplus generation amount is equal to the reference amount. It is determined (S211). Here, if the surplus power generation amount is the same as the reference amount, the second LED is turned on (S213). If the surplus power generation amount is not the same as the reference amount, it is determined that the surplus power generation amount is smaller than the reference amount (S215).

Through these processes, the user determines whether the amount of power generation and the amount of surplus power generation are compared with the reference amount according to whether the first, second, and third LEDs are lit. 4 and 5 illustrate the display in three steps as an example, but may be divided into more or less steps as described above.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments. Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope of the appended claims, The genius will be so self-evident. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Recently, as environmental issues have emerged as social issues, interest in solar power generation systems using clean energy sources has increased. Photovoltaic systems are very useful not only for businesses but also for homes because they use the infinite resource of the sun. This photovoltaic energy is stored in the battery and can be used economically because the amount of use can be adjusted as needed.

In view of this aspect, the present invention displays the amount of power generated in the photovoltaic power generation system so that the user can easily and conveniently check the house, and in particular, by displaying the degree of the amount of generated power so as to display whether there is surplus power or lack of power at home. It can be actively used in homes and businesses that operate solar power systems.

1 is a block diagram illustrating a power generation display device of a solar power generation system according to an exemplary embodiment of the present invention.

2 is an example of implementation of a display unit of a power generation display device according to an exemplary embodiment of the present invention.

3 is a diagram illustrating an implementation of a display unit of a power generation display device according to another exemplary embodiment.

4 is a flowchart illustrating an operation of a power generation display device according to an exemplary embodiment.

5 is a flowchart illustrating an operation of a surplus power generation display device according to another exemplary embodiment of the present invention.

 Explanation of symbols on the main parts of the drawings

20: electric outlet 30: plug

110: first communication unit 120: power generation calculator

130: control unit 140: display unit

150: second communication unit 150: surplus power generation calculation unit

Claims (12)

In the power generation display device in the photovoltaic power generation system for supplying the power generated from the solar cell to a plurality of loads through the power converter, A first communication unit configured to receive power conversion information from the power converter in real time; A second communication unit which receives power consumption measurement information of the load from an external device; A generation amount calculator configured to calculate a generation amount using the received power conversion information; A surplus generation calculation unit configured to calculate a surplus generation amount by using the generation amount calculated by the generation amount calculation unit and the power consumption of the received load; A controller for controlling a display unit to be described later according to the calculated amount of generated power and the amount of surplus generated power; And a display unit for displaying the calculated amount of power generated by the control signal of the controller so as to be distinguished according to the degree, and displaying the amount of excess power generated according to the degree according to the control signal of the controller. Power generation display of the system. The method according to claim 1, wherein the first communication unit, A power generation display device for receiving a power conversion information using any one of the power converter and wired or wireless communication. The method of claim 1, wherein the display unit, The amount of power generation display device of the solar power system for displaying the calculated amount of power divided into a plurality of preset stages according to the degree of size. The method of claim 3, wherein the display unit, A power generation display device of a solar power generation system including a light emitting diode (LED) to emit a plurality of colors distinguished from each other according to the magnitude of the calculated power generation amount. The method of claim 3, wherein the display unit, Power generation display device for displaying the calculated amount of power generation step by step numerical value. The method of claim 3, wherein the display unit, And a power generation amount display device of the photovoltaic power generation system for displaying the calculated power generation amount as one selected from among a predetermined reference amount, a reference amount, and an abnormal value of the reference amount. The method of claim 1, wherein the display unit, Power generation display device of the solar power system is formed in the electrical outlet for using the power generated in the solar power system to display the power generation to the outside. The method of claim 1, wherein the display unit, A power generation display device of a photovoltaic power generation system implemented by a detachable plug that can be connected to and disconnected from a power line between the power converter and a load to externally display the power generation amount. delete The method of claim 1, wherein the display unit, The power generation display device of the solar power system for displaying the calculated surplus amount of power generation divided into a plurality of stages set in advance according to the degree of size. The method of claim 10, wherein the display unit, The power generation amount display device of the solar power generation system for displaying the surplus power generation amount to any one selected below the predetermined reference amount, the reference amount and above the reference amount. The method of claim 10, wherein the display unit, And a light emitting diode (LED) for emitting a plurality of colors distinguished from each other according to the amount of surplus power generation.

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