WO2021177545A1

WO2021177545A1 - Solar power generation system with heating element and method for controlling same

Info

Publication number: WO2021177545A1
Application number: PCT/KR2020/015856
Authority: WO
Inventors: 김준석; 송금석; 김은경; 장병석; 강문식
Original assignee: (주)파루
Priority date: 2020-03-05
Filing date: 2020-11-12
Publication date: 2021-09-10
Also published as: KR102144290B1

Abstract

An embodiment of the present invention comprises a solar power generation system having a heating element (61), comprising: a plurality of photovoltaic modules (50); heating parts (60) which have one or more heating elements (61, 61') and are installed on the rear surface of the photovoltaic modules (50) so as to generate heat; a sensor part (20) which detects the amount of snow and temperature; and a heater controller (10) which controls the heating parts (60) according to sensing information of the sensor part (20), wherein a plurality of heating parts (60) form one group (A, B), each group (A, B) is connected in series to the heater controller (10), and the heater controller (10) sequentially operates each group of the heating parts (60) according to the sensing information of the sensor part (20) with a delay time set for each group (A, B) of the heating parts (60) therebetween.

Description

Solar power generation system with heating element and method for controlling the same

The present invention relates to a solar power generation system having a heating element and a method for controlling the same.

In general, a method of using solar energy is largely divided into a method using solar heat and a method using sunlight. The method of using solar heat is a method of heating and power generation using water heated by solar heat, and it is called solar power generation. The method of making it work is called solar power generation.

Among the above-described methods, solar power generation is a photovoltaic effect (photovoltaic effect) in which an electromotive force by electrons/holes is generated by light energy when n-type doping on a silicon crystal and irradiating sunlight to a solar cell having a p/n junction ) to generate electricity, unlike existing energy sources such as fossil raw materials, it is a clean energy source that does not cause global warming, such as greenhouse gas emissions, noise, and environmental destruction, and there is no fear of exhaustion. In addition, unlike other wind power or sea water power, solar power generation facilities have the advantage of being free to install and low maintenance costs.

Solar power generation requires a solar cell for concentrating sunlight, a photovoltaic module that is an assembly of solar cells, and a solar array in which solar cells are uniformly arranged.

However, in the case of silicon solar cells, which are currently most widely used, when the temperature of the solar cell module increases, an output decrease of 05% per 1°C occurs. According to these characteristics, the output of photovoltaic power peaks in spring and autumn, not in summer, when the sun is the longest. This temperature rise is a major cause of the deterioration of the power generation efficiency of solar power generation. In addition, it has a disadvantage that dirt may easily accumulate on the solar cell module due to weather phenomena such as yellow sand or bad weather. When dirt accumulates on the solar cell module, the light transmittance and light absorptivity of the solar cell module is significantly lowered, so the power generation efficiency is lowered.

Therefore, in order to prevent a decrease in power generation efficiency due to such filth, snow, and rain, a solar power generation facility maintenance device is used. A facility to improve the efficiency of solar power generation is a cooling action that cools the temperature of the solar cell module and washing and snow removal accumulated on the solar cell module such as dirt, snow, rainwater, etc. It functions to maintain and manage solar power generation facilities.

In particular, when snow accumulates on the solar cell module, it is desirable to prevent the accumulation of snow on the solar cell module by rapidly generating heat when it snows, as a decrease in power generation efficiency and damage due to a load may occur.

Therefore, conventionally, a technique for removing snow by melting snow by heating the solar cell module by providing a heating element on the rear surface of the solar cell module has been proposed. However, in this case, as a plurality of heating elements installed for each solar cell module are simultaneously heated, there is a problem in that supply power is consumed.

Accordingly, the present invention has been devised to solve the problems of the related art as described above, and an object of the present invention is a solar power generation system having a heating element capable of reducing supply power by sequentially supplying power to a plurality of heating elements, and a photovoltaic power generation system and the same To provide a control method.

The present invention may include the following examples in order to achieve the above object.

An embodiment according to the present invention includes a plurality of solar cell modules and one or more heating elements, and is installed on the rear surface of the solar cell module to generate heat, and a sensor unit for detecting the amount of snow and temperature, and heat according to the sensing information of the sensor unit a heater controller for controlling the unit, wherein a plurality of the heating units form one group, each group is connected in series to the heater controller, and the heater controller has a delay time set for each group of the heating units according to the sensing information of the sensor unit. It is possible to provide a solar power generation system having a heating element, characterized in that it operates sequentially.

Therefore, the present invention has the effect of saving power supply by grouping a plurality of heating elements and sequentially operating each group with a time difference.

In addition, the present invention can conduct heat from the heating elements to the entire area of the solar cell module, thereby reducing the number of heating elements, thereby saving cost and energy.

1 is a block diagram illustrating a solar power generation system provided with a heating element according to the present invention.

2 is a block diagram illustrating a heater controller.

3 and 4 are perspective views illustrating a solar cell module in the present invention.

FIG. 5 is an exploded view of FIG. 4 .

6 is a cross-sectional view of a main part of FIG. 4 .

7 is a plan view illustrating a heat generating unit.

8 is a cross-sectional view illustrating a cross section of a heat generating unit.

9 is a plan view illustrating another embodiment of the heat generating unit.

FIG. 10 is a cross-sectional view illustrating the heating part of FIG. 9 .

11 and 12 are diagrams illustrating an operation example of a solar cell module.

13 is a flowchart illustrating a control method of a solar power generation system provided with a heating element.

14 is a flowchart illustrating step S310.

15 is a flowchart illustrating step S320.

This research was carried out with the support of the new and renewable energy core technology development (R&D) project of the Korea Institute of Energy Technology and Evaluation under the Ministry of Trade, Industry and Energy of the Republic of Korea under the supervision of Faroo Co., Ltd. It is a structure manufacturing technology (task unique number: 20193010014750), and the research period is from 2019.05.01 to 2021.12.31.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a solar power generation system provided with a heating element according to the present invention, and FIG. 2 is a block diagram illustrating a heater controller.

1 and 2, the photovoltaic power generation system provided with a heating element 61 according to the present invention includes a solar cell module 50 that converts incident sunlight into electric energy and outputs it, and a remote monitoring device from a distance. The control unit 90, the sensor unit 20 for detecting snow and rain, rainfall amount and/or wind speed, the heating unit 60 for heating the solar cell module 50, and a heater for controlling the heating unit 60 It may include a controller 10 , a power supply unit 40 for supplying power to the heating unit 60 , and an emergency switch 30 for outputting an emergency stop command.

The remote control unit 90 receives and outputs the state information (the amount of power generation, the presence or absence of a failure, detection information of the sensor unit 20) of the solar cell module 50 from a distance. Here, the remote control unit 90 may include a server located at a remote location, and it is also possible to transmit monitoring information to a set mobile terminal (not shown). The remote control unit 90 may install and modify the control program of the heater controller 10 (eg, change the setting conditions for controlling the heat generating unit 60 ) and update.

The sensor unit 20 includes a snow load sensor 21 for detecting the amount of snow, a wind speed sensor 23 for detecting wind speed, a temperature sensor 22 for detecting temperature, and a quantity sensor 24 for detecting rainfall. It may include at least one or more of The sensor unit 20 outputs sensing information to the heater controller 10 .

One or more heat generating units 60 are installed on the rear surface of each solar cell module 50 to generate heat under the control of the heater controller 10 . Here, a plurality of the heat generating units 60 are divided into one group (A, B). Accordingly, the heating unit 60 may be set in a plurality of groups A and B. Each group A and B of the heat generating unit 60 is electrically connected in series with the heater controller 10 . In addition, the heating units 60 belonging to the same group (A, B) are connected in parallel to each other.

Accordingly, the heating units 60 are sequentially turned on for each group (A, B), and the heating units 60 belonging to the same group (A, B) may be turned on or off at the same time. For example, the first heat generating unit 60 group A and the second heat generating unit 60 group B are connected in series with the heater controller 10 . Therefore, the heater controller 10 supplies power to the first heat generating unit 60 group (A), and then supplies power to the second heat generating unit 60 group (B) after a set delay time to operate it.

At this time, the heating units 60 belonging to the same group (A, B) are turned on at the same time power is supplied as they are connected in parallel with each other.

The detailed configuration of the heating unit 60 as described above will be described later.

The heater controller 10 is fixed to any one supporting structure among the plurality of solar cell modules 50 , and wired/wireless communication with the sensor unit 20 and the remote control unit 90 and/or the mobile terminal (not shown) The communication module 110 capable of this, the operation module 120 for calculating the power consumption for each group (A, B) of the heat generating unit 60, and the heat generating unit 60 group (A, B) between the delay time It may include a control module 130 for sequentially controlling the control module 130 , a switching module 140 for switching a power line, and a display module 150 for light-emitting display of operation and failure.

The communication module 110 performs communication with the remote control unit 90 and/or a mobile terminal (not shown). For example, the communication module 110 may include a wireless communication device that is connected to the remote control unit 90 by wired communication as a wired communication device or is capable of wireless communication with a mobile terminal (not shown).

The control module 130 turns on or off one or more heat generating units 60 installed for each solar cell module 50 according to the amount of snow, temperature, wind speed and/or rainfall received from the sensor unit 20 . Here, the control module 130 may control the switching module 140 to sequentially operate each heat generating unit 60 for each set group (A, B).

For example, when the plurality of heat generating units 60 are simultaneously operated, more power than necessary is supplied than power consumption. Therefore, the heater controller 10 groups the heating units 60 to reduce such supply power, and sequentially operates the groups (A, B) of the heating units 60 with a delay time therebetween. do.

The operation module 120 calculates the power consumption for each heat generating unit 60 or each heat generating unit 60 grouped into a plurality of heat generating units 60 (A, B) for each group (A, B). Here, information on power consumption for each light emitting unit group (A, B) calculated by the operation module 120 is output to the control module 130 .

The control module 130 compares the set power consumption with the calculated power consumption, and if it does not fall within the set range, controls the display module 150 to indicate the occurrence of a failure, and controls the communication module 110 to control the remote control unit 90 and/or control to transmit a failure alert to a mobile terminal (not shown).

The switching module 140 energizes the output power line of the power supply unit 40 and the power line connected to each group (A, B) of the heating unit 60 under the control of the control module 130 . For example, the switching module 140 turns on the first power line and the power supply unit 40 connected to the group A of the first heating unit 60 under the control of the control module 130, and after a set delay time In the second heat generating unit 60, the power line between the second power line connected to the group (B) and the power supply unit 40 is energized.

The display module 150 emits light to indicate whether the control module 130 operates or not by the control or operation module 120 . To this end, the display module 150 may be composed of a plurality of LEDs emitting colored light so that on, off, and failure can be visually checked.

The emergency switch 30 outputs an emergency stop command so that the operator can manually turn off the heating unit 60 . The emergency stop command is output to the heater controller 10 , and the heater controller 10 turns off the entire heating unit 60 according to the emergency stop command output from the emergency switch 30 .

The power supply unit 40 may include a battery 42 for storing power generated by the solar cell module 50 and a commercial power supply unit 41 for converting and supplying external power. Here, the battery 42 and the commercial power supply unit 41 may selectively supply power to the heater controller 10 and the heating unit 60 by the heater controller 10 or a separate power control device (not shown).

For example, the power control device (not shown) may include an output power line of the commercial power source 41 and a power line connected to the heating unit 60 according to the charge amount of the battery 42 , or the output power of the battery 42 . It is also possible to control the switching so that the line and the power line of the heating unit 60 are connected.

The solar cell modules 50 are arranged in a state spaced apart from the ground by a support structure as a plurality, and convert the incident sunlight into electrical energy and output it. Here, the solar cell module may melt snow or ice accumulated on the upper surface by the heat generated by the heat generating unit 60 .

The structure of the solar cell module and the detailed configuration of the heat generating unit 60 will be described with reference to FIGS. 3 to 8 .

First, the configuration of the solar cell module will be described with reference to FIGS. 3 to 6 .

3 is a perspective view illustrating a solar cell module supported by a support pillar in the present invention, FIG. 4 is a perspective view illustrating a solar panel and a support frame, and FIG. 5 is an exploded view of FIG. FIG. 6 is a cross-sectional view of the main part of FIG. 4 , FIG. 7 is a plan view illustrating the heating unit, and FIG. 8 is a cross-sectional view illustrating the heating unit.

3 to 8 , the solar cell module includes a solar panel 51 to which sunlight is incident, a support frame 52 supporting the solar panel 51 , and a support frame 52 to be spaced apart from the ground. It includes a support structure for fixing it.

The solar panel 51 converts and outputs electric energy when sunlight is incident on it. Here, the solar panel 51 is fastened to the support frame 52 at both ends, so that a plurality of them are aligned.

The double support frame 52 has an upper inlet groove 521 through which the side end of the solar panel 51 is introduced from the upper end of the main body extending in one direction, and a lower fastening end that protrudes from the lower end and is fastened to the heating unit 60 ( 522) may be included.

Here, the support frame 52 may be supported by a support structure including a support pillar 53 as shown in FIG. 3 .

The support structure is not limited to that shown in the drawings, and a rotating device may be added to be rotated according to the position of sunlight.

The heating unit 60 includes a heating element 61 that generates heat when power is supplied, a support means 62 for fixing the heating element 61 to the solar panel 51 , and a support means 62 to a support frame 52 . It includes a fastening means (63) for fastening, and a fixing means (64) for pressing the fastening means (63) to the support frame (52).

The heating element 61 includes a substrate 611 , an electrode 616 , a heating pattern 612 printed on the substrate 611 to constitute a heating wire, and a protective layer 613 applied on the upper surface of the heating pattern 612 ) and an adhesive layer 614 laminated on the upper surface of the protective layer 613 , and a heat insulating material 615 .

The substrate 611 is a film of an insulating material and has a thin thickness (eg, 0.1 mm to 5 mm).

The heating pattern 612 extends to the positive and negative electrodes 616, respectively, and heats up when power is supplied. That is, the heating pattern 612 functions as a heating wire. In addition, the heating pattern 612 may be printed on one surface of the substrate 611 by conductive ink. For example, the conductive ink is applied to one surface of the substrate 611 as silver nano ink to configure the heating pattern 612 .

The protective layer 613 is, for example, a liquid resin containing carbon, and is applied to the upper surface of the heating pattern 612 to perform insulation, electromagnetic wave shielding, and protection functions.

The adhesive layer 614 is formed on the upper surface of the protective layer 613 and is in close contact with the rear surface of the solar cell module 50 . For example, the adhesive layer 614 is a double-sided tape, with one side exposed first and adhered to the upper surface of the protective layer 613 , and then the adhesive solution on the opposite side is exposed and adhered to the back surface of the solar cell module 50 . Here, the adhesive layer 614 performs a function of temporarily adhering until the support means 62 is fixed.

The heat insulating material 615 blocks the heat generated by the heating pattern 612 from being conducted to the support means 62 .

The support means 62 may be fixed to the rear surface of the solar panel 51 by accommodating the heating element 61 on one surface. For example, the support means 62 is a metal bar made of aluminum extending in one direction, and the heating element is adhered to the upper surface to press and fix the heating element to the rear surface of the solar panel 51 . Here, the support means 62 may further include a bending end 622 extending downward from the front and rear surfaces or both sides so that the fastening means 63 can be fastened in a fitting manner and the ends are bent.

The fastening means 63 includes a long groove 632 facing inward from both sides, a short groove 631 extending from the front or rear to both sides, and a fixing hole 633 to which the fixing means 64 is screwed.

The long groove 632 is a long groove 632 facing inward on both sides, and the bent end 622 of the support means 62 is fitted.

The short groove 631 is a groove facing inward from the front to both sides, into which the lower fastening end 522 of the support frame 52 is fitted.

The fixing hole 633 is threaded on the inner surface so as to be screwed with the fixing means 64 such as bolts or screws.

Here, the fixing means 64 presses the short groove 631 while being screwed with the fastening means 63 as bolts or screws. That is, as for the fastening means 63 , the bent end 622 is fitted into the long groove 632 , and the lower fastening end 522 of the support frame 52 is fitted into the short groove 631 . And the fixing means 64 is fastened to the fixing hole 633 and rotated in the connection state of the fastening means 63 as described above to tighten the short groove 631 . Accordingly, the lower fastening end 522 of the support frame 52 may be fixed within the short groove 631 by tightening the short groove 631 by the fixing means 64 .

A plurality of heat generating units 60 may be installed on one supporting means 62 . That is, two or more heat generating units 60 may be fixed to one solar cell module 50 by one supporting means 62 . Another embodiment of the heating unit 60 will be described with reference to FIGS. 9 and 10 .

9 is a plan view illustrating another embodiment of the heating unit, and FIG. 10 is a cross-sectional view of the heating unit of FIG. 9 .

9 and 10 , another embodiment of the heating unit 60 includes two or more heating elements 61 , a support means 62 , and a heat-conducting sheet 65 for conducting heat of the heating elements 61 . do.

Here, the support means 62 includes a housing 621 capable of accommodating two or

more heating elements

61 and 61 ′ on the inside, electrodes 616 of the heating elements 61 and a power supply line extending from the power supply unit 40 . It may include a power connector board 623 for connecting.

The housing 621 is formed with upright wall surfaces on the front and rear left and right sides to form a space for accommodating the plurality of heating elements 61 and a space for installing the power connector board 623 . Here, the housing 621 may include an upright partition wall 621a to partition a space in which the power connector board 623 is installed and a space in which the heating elements 61 are accommodated. Preferably, the partition wall 621a has a plurality of cutouts (not shown) so that the positive (+) and negative (-) electrodes 616 and the power connector board 623 can be interconnected, or The height of the partition wall 621a may be adjusted.

Here, the housing 621 may include a bent end 622 that extends and bends downward so that the fastening means 63 of the embodiment described above is fitted, so that the support frame (by the fastening means 63 and the fixing means 64) 52) can be fixed.

The power connector board 623 electrically energizes the terminal (not shown) to which the electrode 616 of the heating element 61 is connected, the power line extending from the power supply unit 40, and the electrodes of the heating elements 61 and 61'. A circuit may be configured. Here, the power connector board 623 is fixed to the space partitioned by the partition wall 621a of the housing 621 by an adhesive or other fixing fixtures (screws or bolts).

The heating elements 61 and 61' are installed to be spaced apart from each other as, for example, the first heating element 61 and the second heating element 61', respectively, the substrate 611, the heating element 61, and the protective layer 613. and a heat insulating material 615 and/or an adhesive layer 614 . At this time, the first heating element 61 and the second heating element 61 ′ are electrically connected to the power connector board 623 , and are connected in parallel with each other.

The heat conduction sheet 65 is laminated on the upper surfaces of the plurality of heating elements 61 and 61' to conduct heat. For example, the heat conductive sheet 65 may include a resin layer 651 made of an insulating material and a heat conductive metal wire 652 embedded in the resin layer 651 .

Here, the adhesive layer 614 of the heating element 61 is applied to the upper surface of the resin layer 651 as a double-sided tape.

Alternatively, the heat conductive sheet 65 may be laminated on the upper surface of the adhesive layer 614 . In this case, the heat conduction sheet 65 may be temporarily attached to the rear surface of the solar panel 51 by a separate double-sided tape and then completely fixed by the support means 62 .

The resin layer 651 insulates the heat-conducting metal wire 652 embedded therein by applying and curing an insulating liquid resin.

The heat-conducting metal wire 652 extends in a form embedded in the resin layer 651 to conduct heat generated from the heating elements 61 to the entire rear surface of the solar panel 51 . Here, the heat-conducting metal wire 652 may be formed in a mesh shape as it cross-extends in the horizontal and vertical directions. The heat-conducting metal wire 652 is preferably manufactured in an area that can be installed on the entire rear surface of the solar panel 51 .

In general, the solar cell module 50 may vary in real time according to the position of sunlight. Therefore, the present invention can also be applied to a solar cell module to which a solar tracking device capable of changing the posture of the solar cell module 50 according to the position of the sun as described above is added. This will be described with reference to FIGS. 11 and 12 .

11 and 12 are views showing another embodiment of the solar cell module in the present invention.

11 and 12 , the present invention provides a rotational part 80 that deforms the position of the solar cell module 50 and a rotational driving part that operates the rotational part 80 under the control of the heater controller 10 ( 70) may be included. In addition, the rotating unit 80 will be briefly described with only the main configuration and principle as the technology applied to the tracking device of the generally known solar cell module 50 is applied. However, the rotation unit 80 to be described below does not limit the present invention, and corresponds to any device capable of changing the position of the solar cell module 50 .

The rotation driving unit 70 drives the rotation unit 80 installed in the solar cell module 50 under the control of the heater controller 10 or the remote control unit 90 .

The rotation unit 80 is between the cylinder 81 operated by the control of the rotation driving unit 70 , the rotation bar 82 connected to the cylinder 81 , and the solar cell module 50 and the rotation bar 82 . It includes a connection bar 83 that is rotatably connected in the and a support bar 84 for supporting the solar cell module 50 .

When an operation command is inputted from the rotation driving unit 70 , the cylinder 81 moves the rotation bar 82 forward or backward.

The support bar 84 is rotatably connected between the rotation bar 82 and the solar cell module 50 . That is, the support bar 84 rotates the solar cell module 50 counterclockwise or clockwise when the rotation bar 82 is moved forward.

Therefore, the heater controller 10 detects the amount of snow according to the detection signal of the snow sensor 21, and when the detected amount of snow exceeds the set standard, controls the rotation driving unit 70 to set the solar cell module 50 in an upright position. control to keep

This can prevent snow accumulation by deforming the solar cell module 50 to an upright posture when the snow accumulation time is faster than the snow melting time by the heating element 61 .

The present invention includes the configuration as described above, and below, a control method of a solar power generation system having the heating element 61 using the configuration as described above will be described.

13, in the present invention, the heater controller 10 collects detection information from the sensor unit 20, step S100, comparing the detection information with a set standard, step S200, and the heating unit 60 group (A) , step S300 of sequentially operating each B), step S400 of detecting on/off of the emergency switch 30, and step S500 of turning off the heating elements 61 by cutting off the power when the emergency switch 30 is turned on. .

Step S100 is a step in which the heater controller 10 collects detection information of the sensor unit 20 . The heater controller 10 receives snow amount detection information of the snow load sensor 21 , temperature detection information of the temperature sensor 22 , wind speed detection information of the wind speed sensor 23 , and rainfall detection information of the water quantity sensor 24 . do.

Step S200 is a step in which the heater controller 10 compares detected information with set information. For example, the heater controller 10 sets a standard for operating the heating element 61 according to the amount of snow, temperature, wind speed, and rainfall. For example, the heating element 61 may be operated when the temperature is below the set temperature or the wind speed exceeds the set value even when it snows or snows stop, and when it is detected below the set temperature and/or the set wind speed or more after it rains or stops can

That is, the heater controller 10 may set criteria for combining the amount of snow, rainfall, temperature, and wind speed.

Step S300 is a step in which the heater controller 10 sequentially operates the heating elements 61 when the detection information corresponds to the condition set in step S200 . Here, the heating units 60 including the heating element 61 are set in a plurality of groups A and B, and each of the heating units 60 groups A and B is connected in series to the heater controller 10 . In addition, the heating elements 61 belonging to the same group (A, B) are connected in parallel.

Therefore, the heater controller 10, for example, operates the second heat generating unit 60 group (B) after a set delay time elapses after operating the first heat generating unit (60) group (A). As described above, the heater controller 10 sequentially operates the groups A and B of the heating unit 60 at a set delay time period.

Here, the switching module 140 of the heater controller 10 sequentially connects the output power line of the power supply unit 40 and the power line connected to the corresponding heating unit 60 groups A and B. Therefore, the supply power output from the power supply unit 40 is not for simultaneously operating the entire heating unit 60 group (A, B), but can be reduced as it is sequentially supplied for each heating unit 60 group (A, B). .

Step S400 is a step in which the heater controller 10 detects on/off of the emergency switch 30 . Here, the emergency switch 30 may be manually operated by an administrator and may be provided integrally with the heater controller 10 .

Alternatively, the remote control unit 90 may remotely control the emergency switch 30 or transmit an emergency stop command.

Accordingly, the heater controller 10 detects whether the emergency switch 30 is turned on or an emergency stop command from the remote control unit 90 is received after the heating element 61 is operated.

Step S500 is a step in which the heater controller 10 turns off the groups A and B of the heating unit 60 when an emergency stop command is received. For example, when the emergency switch 30 is turned on or an emergency stop command is received from the remote control unit 90 , the switching module 140 is connected in series with the power supply unit 40 and the heating unit 60 for each group (A, B). cut off the power line.

Of these, step S300 may include a step S310 for vertically controlling the solar cell module 50 according to the amount of snow, and a step S320 for detecting whether or not the groups A and B of the heating unit 60 are faulty. This will be described with reference to FIGS. 14 and 15 .

14 is a flowchart illustrating step S310.

Referring to FIG. 14 , step S310 includes step S311 of detecting snow load, step S312 of sequentially driving for each group (A, B) of the heat generating unit 60, step S313 of comparing the set first snow load amount with the detected snow amount, and , a step S314 of comparing a time reference when a snow load exceeding the set first snow load is detected, a step S315 of comparing the detected snow amount with a set second snow amount if it does not correspond to a set time standard, a set time standard or a set second When the amount of snow falls, a step S316 of controlling the solar cell module 50 upright, and a step S317 of controlling the groups (A, B) of the heat generating units 60 at a differential cycle according to the temperature and/or wind speed standard are included.

Step S311 is a step in which the heater controller 10 receives detection information of the snow load sensor 21 . The heater controller 10 receives sensing information of the sensor unit 20 in real time.

Step S312 is a step in which the heater controller 10 sequentially operates for each group (A, B) of the heating unit 60 when snow is detected. When the snow starts to fall, the heater controller 10 sequentially operates the heating unit 60 for each group (A, B). At this time, when the set delay time elapses after any one of the plurality of heat generating units 60 groups A and B is operated, the heater controller 10 supplies power to the next heat generating unit 60 groups A and B. control to supply

In step S313 , the heater controller 10 receives the snow load amount detection information from the snow load sensor 21 and compares it with a set first snow load amount. Here, the heater controller 10 continuously receives the detection information of the snow load sensor 21 even after the heating element 61 is operated and compares the sensed snow load amount with the set first snow load amount.

Step S314 is a step in which the heater controller 10 detects whether the set first snowfall amount corresponds to the set time reference. For example, the time reference may include a time zone from after sunset to before sunrise. Accordingly, the heater controller 10 compares the current time with the time reference through its own timer.

In step S315 , if the current time does not correspond to the time reference, the heater controller 10 detects whether the snow load amount detected by the snow load sensor 21 corresponds to the set second snow load amount. Here, the second snow load is set to be larger than the first snow load.

Step S316 is a step in which the heater controller 10 controls the solar cell module 50 upright when the time reference or the second snow load is sensed. The heater controller 10 outputs an operation command to the rotation driving unit 70 when it corresponds to the snow load amount set according to the detection information of the snow load sensor 21 .

Therefore, the rotation driving unit 70 operates the rotation unit 80 to transform the solar cell module 50 into an upright posture. Therefore, as the solar cell module 50 maintains an upright posture, all of the previously accumulated snow may fall to the ground, and the amount of snow accumulated thereafter may be minimized.

Step S317 is a step in which the heater controller 10 controls the groups A and B of the heating units 60 to operate in a differential cycle according to the sensing information of the sensor unit 20 . For example, after the solar cell module 50 is erected, the heater controller 10 may alternately turn on and off for a set period of time for which the heating unit 60 groups A and B are set according to temperature, wind speed, and time. control so that

For example, the heater controller 10 controls so that the on time of the groups A and B of the heating unit 60 is longer and the off time is shorter as the temperature is lower and the wind speed is stronger.

Also, the heater controller 10 may turn the heating element 61 off and/or release the upright position when the heating element 61 off criterion and/or the upright release condition are met in step S317 .

The off criterion of the heating element 61 may be set such that any one or more of temperature (eg, 20° C. or higher), wind speed, and rainfall are combined, and the upright release condition is a combination of time, snow load, and temperature. can be

Step S320 will be described with reference to FIG. 15 . 15 is a flowchart illustrating a failure detection step in step S320.

Referring to FIG. 15 , step S320 includes a step S321 of measuring power consumption for each group (A, B) of each heating unit 60 in the heater controller 10, and a consumption among groups (A, B) of the heating unit 60 Step S322 for detecting an abnormality in the group (A, B) of the heating unit 60 according to whether there is a difference between power and set power consumption, and step S323 for waiting for a set time when an abnormality is detected, and consumption after the standby time Step S324 of re-measuring power, step S325 of detecting a failure after re-measurement, and step S326 of outputting and transmitting a failure alert.

Step S321 is a step in which the heater controller 10 measures the power consumption for each heat generating unit 60 group (A, B). The operation module 120 calculates power consumption for each group (A, B) of each heat generating unit 60 supplied with power by the switching module 140 . Here, the arithmetic module measures power consumption for each set time period, and the control module 130 compares the set power consumption standard with the power consumption of each heat generating unit 60 group (A, B) calculated by the arithmetic module 120 . to detect any abnormality.

For example, the first heating unit 60 group (A) includes a first heating element 61 and a second heating element 61 ′, among which the first heating element 61 is not operated due to a failure, and the second Only the heating element 61' can be operated. Therefore, in the group (A) of the first heating unit 60, as only one heating element (61, 61') is operated, the power consumption is reduced to half compared to the normal operation.

And the power consumption standard is set to the range of power consumption used when the heating unit 60 group (A, B) is operated.

Accordingly, the control module 130 may detect whether there is an abnormality based on the actual power consumption calculated by the operation module 120 and the set power consumption standard.

Step S323 is a step of waiting for a time set in the heater controller 10 .

Step S324 is a step in which the heater controller 10 re-measures the power consumption of the groups A and B of the heating unit 60 for which the abnormality is detected in step S322 after the standby time. The operation module 120 re-measures the power consumption of the group (A, B) of the heating unit 60 for a set time after the standby time, and outputs the result.

Step S325 is a step of detecting whether there is a failure by comparing the re-measured power consumption by the heater controller 10 with a set power consumption standard. The control module 130 detects a failure based on whether there is a difference between the re-measured power consumption of the operation module 120 and the set power consumption standard.

Step S326 is a step of alerting a failure when the power consumption re-measured by the heater controller 10 is different from the set power consumption standard. The failure alarm may be transmitted directly to the remote control unit 90 and a mobile terminal (not shown). Alternatively, the heater controller 10 may operate the display module 150 to display whether there is a malfunction or not.

As described above, the present invention sets a plurality of heating units 60 provided with one or more heating elements 61 and 61' as one heating unit 60 group (A, B), and each heating unit ( 60) Groups (A, B) can be operated sequentially at a set delay time interval to reduce supply power, Since the heating time of the heating element 61 can be shortened, energy can be saved.

Claims

a plurality of solar cell modules 50 each having a solar panel 51 and a support frame 52 supporting the solar panel 51;

a heating unit 60 having one or more heating elements 61 and 61 ′ and installed on the rear surface of the solar panel 51 to generate heat;

The sensor unit 20 for detecting the amount of snow and temperature; and

Includes; heater controller 10 for controlling the heating unit 60 according to the sensing information of the sensor unit 20;

The heating part 60 is

Form one group (A, B) as a plurality, each group (A, B) is connected in series to the heater controller (10),

The heater controller 10 sequentially operates the heating element 61 according to the detection information of the sensor unit 20 with a delay time set for each group (A, B) of the heating unit 60 therebetween; Equipped with solar power system.
The method according to claim 1,

An emergency switch 30 for outputting an emergency stop command to the heater controller 10; Solar power generation system having a heating element 61 further comprising.
The method according to claim 1, The heating element (61)

a pattern 612 printed on the substrate 611 with conductive ink;

a protective layer 613 laminated on the upper surface of the pattern 612 ;

an adhesive layer 614 adhered to the rear surface of the solar panel 51 on the upper surface of the protective layer 613 ; and

an insulator 615 for blocking heat from the lower surface of the substrate 611; Solar power generation system having a heating element comprising a.
The method according to claim 1,

Support means 62 for supporting the heating element 61 on the rear surface of the solar panel 51; including,

The support means 62 is

A solar power generation system having a heating element, characterized in that extending in one direction to support the heating element 61 stacked on the upper surface.
The method according to claim 4, wherein the lower fastening end (522) extending from the lower end of the support frame (52) is directed inward to enter the short groove (631), both sides are inwardly extended and bent from both sides of the support means (62) downwardly extending and bending It further includes; a long groove 632 fitted to the end 622, and a fastening means 63 including one or more fixing holes 633 screwed to the fixing means 64;

The short groove 631 is

The fixing means 64 screwed into the fixing hole 633 is pressed while rotating to press the lower fastening end 522 of the support frame 52; a photovoltaic system with a heating element, characterized in that.
The method according to claim 4, The heating element (61)

A solar power generation system having a heating element (61), characterized in that;
a) collecting information detected from the sensor unit 20 in the heater controller 10 , at least one of snow load and temperature;

b) comparing the criteria set by the heater controller 10 with the received sensing information;

c) dividing the plurality of heating elements 61 into one group (A, B) in the heater controller 10 and sequentially operating the plurality of groups (A, B) with a set delay time therebetween;

d) detecting on/off of the emergency switch 30 in the heater controller 10; and

e) When the emergency switch 30 is turned on, the control method of a solar power generation system having a heating element 61 comprising the step of turning off the heating elements 61 by cutting off the power.
The method according to claim 7, c) step

c-1) When snow is detected by the heater controller 10, when a set delay time elapses after any one of the plurality of heat generating units 60 groups (A, B) is operated, the next heat generating unit 60 controlling to supply power to the groups (A, B);

c-2) comparing the amount of snow detected by the heater controller 10 with a set first snow amount;

c-3) when the heater controller 10 detects a set first snow load, detecting whether it corresponds to a set time standard;

c-4) detecting, by the heater controller 10, if the current time does not correspond to the time reference, whether the detected snow load corresponds to a set second snow load (second snow load > first snow load);

c-5) controlling the solar cell module 50 upright when the heater controller 10 detects a time reference or a second snow load; and

c-6) so that the heater controller 10 is alternately turned on and off for a set time according to the temperature, wind speed, and time after the heater controller 10 is erected by the solar cell module 50 Controlling; including;

In step c-6), the lower the temperature and the stronger the wind speed, the longer the on time of the groups (A, B) of the heat generating part 60 is, and the shorter the off time; a heating element 61 is provided A control method of a solar power generation system.