KR20180013357A - Solar cell generating system - Google Patents

Abstract

The present invention relates to a solar power generation system. The solar power generation system comprises: a solar battery module array collecting sunlight through multiple unit solar battery cells to produce electricity; a connection board unit collecting the electricity produced in the solar battery module array, and producing the electricity as a direct current power; and an inverter unit converting the direct current power into an alternating current power, and outputting the converted alternating current power to the outside. Defects of the multiple unit solar battery cells can be quickly detected.

Description

Solar power generation system {SOLAR CELL GENERATING SYSTEM}

The present invention relates to a solar power generation system, and more particularly, to a solar power generation system capable of monitoring an overall operation state of the solar power generation system.

Humans are living on fossil fuels such as petroleum, coal, and gas as their primary source of energy. However, recently, problems related to environmental pollution and depletion of fossil fuels have emerged, and interest in renewable energy to overcome this problem is increasing. At the center of renewable energy is the sun.

The sun gives human light and heat energy generously. So, humans have already used the heat of the sun for a long time as heat source for heating or hot water. However, the development of human technology not only exploited the heat energy of the sun but also developed to use the light energy of the sun.

The sun's light energy is converted into electrical energy through solar cells, and the converted electrical energy can be used in many places in human society. Nowadays, a solar power generation system is being developed, in which a panel with a solar cell is installed on a large scale to condense solar energy, which is sunlight energy, and use it to mass-produce electricity.

Solar power generation system is semi-permanent, relatively easy to maintain solar cell, is pollution-free, uses the light energy of the sun, and is becoming a future alternative energy production facility.

The photovoltaic power generation system basically generates the electric energy of the direct current by using the solar cell module which collects the solar energy, converts it into the alternating electric energy through the inverter and supplies it to the load connected with the electric power system. The extra electricity is transferred to the KEPCO system. If the load connected to KEPCO system is insufficient, electricity will be supplied from KEPCO.

The voltage of the electricity generated by the photovoltaic system depends on the size of the solar cell module. Therefore, although a larger solar cell module is being developed to obtain a higher voltage, there is a problem that the production cost becomes too high. For this reason, it is general that the solar cell module is composed of a plurality of unit solar cell cells and connected in series to generate electricity of a desired voltage.

However, in the solar power generation system, when one of the plurality of unit solar cells fails due to the series structure, the generated electricity is not transmitted to the inverter. Therefore, it is important to grasp the fault location of the solar cell accurately and quickly and to repair it.

In addition, the photovoltaic power generation system must be exposed to the natural environment because it has to concentrate sunlight. Therefore, the PV system may experience unexpected abnormal operation due to unexpected situations in the natural environment. One of them is a situation where the voltage of the electric transmission line in the solar power generation system becomes higher than a predetermined voltage.

Generally, when the voltage of the electricity transmission line becomes higher than the predetermined voltage, the electricity transmission is cut off by the fuse provided inside the solar power generation system. However, the blocking of the fuse means the blocking of the electric current immediately, which means that the manager can perform normal operation again by replacing the integrated fuse. Of course, fuses are the last stabilizers that can prevent the extreme conditions of the photovoltaic system, but frequent fuse blowing increases fatigue in managing the photovoltaic system.

(Document 1) Korean Patent Registration No. 10-1043237 (Photovoltaic Module, Jun. 15, 2011) (Document 2) Korean Patent Registration No. 10-1496199 (Solar Cell System Having Power Cutoff Function and Its Control Method)

Accordingly, it is an object of the present invention to provide a photovoltaic power generation system capable of quickly detecting a defective photovoltaic cell among a plurality of unit photovoltaic cells.

It is another object of the present invention to provide a solar power generation system capable of detecting a high voltage ideally generated in an electricity transmission line and storing it in a live part.

It is another object of the present invention to provide a photovoltaic power generation system in which a normal fuse and a redundancy fuse are provided to replace a normal fuse when the normal fuse can not be used and replace it with a redundancy fuse.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide an apparatus and method for controlling the same.

According to an aspect of the present invention, there is provided a solar cell module including a plurality of solar cell modules including a plurality of unit solar cell units, A solar cell module array for collecting electricity to produce electricity; A connection half unit for collecting the electricity produced in the solar cell module array and producing it as DC power; And an inverter unit converting the direct current power into alternating current power and outputting the alternating current power to the outside, wherein each of the plurality of solar cell modules includes a row line and a column line which are equal to or less than the number of the plurality of unit solar cells of the corresponding solar cell module, And a failure detector for detecting the failure of each of the plurality of unit solar cells through the row line and the column line, wherein the connection half unit determines whether or not the failure generated in the failure detection unit is communicated to the outside And a communication unit for providing the electric power to the manager.

In the present invention, the connection half unit may include: an input unit for receiving electricity generated from the solar cell module array; A detecting unit for detecting a state value of electricity output from the input unit; A charging unit connected to the input unit and charging the electricity input through the input unit in response to the detection result of the detection unit; And a blocking unit for blocking the input unit and the output unit when the voltage level of the electric power output from the input unit becomes higher than a predetermined voltage level.

In the present invention, it is preferable that the input unit and the cut-off unit are formed in a modular form on a substrate, and the output end including a high current member is connected to one end of the substrate.

In the present invention, it is preferable that the communication unit is configured to receive the detection result of the detection unit, the charging state of the charging unit, and the operation state of the blocking unit and provide the received information to the manager.

In the present invention, the shielding portion may include: a normal fuse member connected in a normal operation; A redundancy fuse member selectively connected between the input unit and the output terminal after the normal fuse member is cut off; And a control unit for connecting the redundancy fuse member instead of the normal fuse member under the control of the manager.

The solar power generation system according to the present invention provides the following effects.

The present invention has the effect of rapidly detecting and repairing defective solar cell cells among a plurality of unit solar cell cells, thereby improving electric productivity through continuous electricity production.

The present invention has the effect of increasing the energy utilization rate by separately charging the high voltage electricity generated in an unexpected situation without wasting it.

The present invention can minimize the management time associated with the fuse because monitoring the operation status after the fuse being used is shut off and replacing it with the redundancy fuse prepared according to the result.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 is a block diagram for explaining a photovoltaic power generation system according to an embodiment of the present invention;
Fig. 2 is a view for explaining the solar cell module array 10 of Fig. 1; Fig.
3 is a block diagram for explaining the DC connection half unit 20 of FIG.

The description of the present invention is merely an example for structural or functional explanation, and the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, the embodiments are to be construed as being variously embodied and having various forms, so that the scope of the present invention should be understood to include equivalents capable of realizing technical ideas. Also, the purpose or effect of the present invention should not be construed as limiting the scope of the present invention, since it does not mean that a specific embodiment should include all or only such effect.

Meanwhile, the meaning of the terms described in the present application should be understood as follows.

The terms "first "," second ", and the like are intended to distinguish one element from another, and the scope of the right should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, but there may be other elements in between. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

It is to be understood that the singular " include "or" have ", as used herein, is intended to encompass a plurality of expressions, unless the context clearly dictates otherwise, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

In each step, the identification code (e.g., a, b, c, etc.) is used for convenience of explanation, the identification code does not describe the order of each step, Unless otherwise stated, it may occur differently from the stated order. That is, each step may occur in the same order as described, may be performed substantially concurrently, or may be performed in reverse order.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used predefined terms should be interpreted to be consistent with the meanings in the context of the related art and can not be interpreted as having ideal or overly formal meaning unless explicitly defined in the present application.

1 is a block diagram for explaining a photovoltaic power generation system according to an embodiment of the present invention.

1, a photovoltaic power generation system includes a solar cell module array in which a plurality of solar cell modules including a plurality of unit solar cell cells are arranged and solar light is condensed through the plurality of unit solar cell cells, (10); A DC connection half unit 20 for collecting the electricity produced by the solar cell module array 10 to produce DC power; And an inverter unit 30 for converting the DC power into AC power and outputting the AC power to the outside.

The solar cell module array 10 is a structure for collecting sunlight to produce electricity. The solar cell module array 10 includes a plurality of solar cell modules, and each of the plurality of solar cell modules 110 (see FIG. 2) includes a plurality of unit solar cell cells UN (see FIG. 2). A plurality of unit solar cells (UN) are connected to each other in series, and sunlight condensed in a plurality of unit solar cells (UN) is output as electric energy.

The DC connection half unit 20 is a structure for collecting the electricity produced by the solar cell module array 10 to generate DC power. The detailed configuration and operation of the DC connection half unit 20 will be described in detail in FIG.

The inverter unit 30 converts the AC power output from the DC connection half unit 20 into AC power that can be generally used and finally outputs the AC power. The output power (V_OUT) output from the inverter unit (30) is charged to the installed charger or delivered to the charger and sold.

2 is a view for explaining the solar cell module array 10 of FIG.

Referring to FIG. 2, the solar cell module array 10 includes a solar cell module 110 including a plurality of unit solar cells UN; And a failure detection unit 120 for detecting the failure T1 of each of the plurality of unit solar cell UN.

For convenience of explanation, it is assumed that the solar cell modules 110 are arranged in an array of 10 rows and 10 columns and include a total of 100 unit solar cells (UN). Then, each unit solar cell (UN) may cause defects in a natural environment for some reason or another.

The failure detection unit 120 is configured to detect whether or not each of the plurality of unit solar cells UN is defective. The defect detection unit 120 is connected to each of the plurality of unit solar cells UN, and particularly to the horizontal lines and the vertical lines of the plurality of unit solar cells UN.

In other words, a line connected between the plurality of unit solar cell cells UN and the defect detection unit 120 can be divided into a horizontal line and a vertical line, and the lines corresponding to ten horizontal lines of the unit solar cell UN The first to tenth column lines C1 to C10 corresponding to the ten vertical lines of the first to tenth row lines R1 to R10 and the unit solar cell UN.

That is, the solar cell module 110 including 100 multiple unit solar battery cells UN includes ten first to tenth row lines R 1 to R 10) and ten first to tenth column lines C1, ..., C10, respectively. Therefore, if a failure occurs in the fourth unit cell (UN) of the fourth unit cell, the defective unit (T1) is transmitted through the fourth row line (R4) and the third column line (C3) (120) can detect whether or not a failure (T1) of the fourth vertical third unit solar cell (UN) is bad.

As will be described later, the defectiveness (T1) detected by the defect detection unit 120 is transmitted to the communication unit 240 (see FIG. 3) provided in the DC connection half unit 20 and is provided to the administrator, It is possible to quickly select and repair the unit solar cell UN in which a failure has occurred.

The photovoltaic power generation system according to the embodiment of the present invention detects the failure T1 of the unit solar cell UN included in each of the plurality of solar cell module arrays 10 quickly and informs the manager thereof, Thereby quickly repairing the unit solar cell (UN) in which the failure occurs, thereby providing an environment in which the solar power generation system can continuously produce electricity. And, this means electricity cost savings due to improvement of electric productivity and improvement of production.

3 is a block diagram for explaining the DC connection half unit 20 of FIG.

Referring to FIG. 3, the DC connection half unit 20 includes an input unit 210 for receiving electricity generated from the solar cell module array 10; A detecting unit 220 for detecting a state value of electricity output from the input unit 210; A charging unit 230 connected to the input unit 210 for charging electricity input through the input unit 210 in response to a detection result of the detection unit 220; And a cutoff unit 240 for cutting off the input unit 210 and the output unit 250 when the voltage level of the electric power output from the input unit 210 becomes higher than a predetermined voltage level.

The input unit 210 is configured such that the DC connection half unit 20 receives electricity generated from the solar cell module array 10 and transmits the received electricity to the output unit 250 through the cutoff unit 240. In the input unit 210, electricity having a predetermined state value is output according to the design of the plurality of unit solar battery cells UN. However, if the voltage of the electric power outputted from the input unit 210 increases unexpectedly, the blocking unit 240 disposed at the subsequent stage senses the voltage and completely disconnects the input unit 210 and the output unit 250.

The detection unit 220 is configured to detect an electric state value output from the input unit 210. The detection unit 220 detects a state value of the electricity, and detects a state value that is below a state where the normal state is exceeded and the cutoff unit 240 performs a shutoff operation. That is, the non-dangerous state value is detected so as not to be in the normal state but to perform the blocking operation. The detection result is supplied to the charging unit 230. [

The charging unit 230 is configured to charge the electricity delivered from the input unit 210 and is activated in response to the detection result of the detection unit 220. That is, the charger 230 is activated when the state of the electric power transmitted from the input unit 210 is not a normal state but is not dangerous enough to perform the blocking operation, so that the electric power can be charged.

The blocking unit 240 is configured to perform a blocking operation when the voltage level of the electric power output from the input unit 210 is in an unexpected state and is dangerous. The blocking unit 240 may include a diode and a fuse connecting the input unit 210 and the output unit 250. Here, the diode is configured to prevent the reverse bias state, and the fuse is configured to cut off the input unit 210 and the output stage 250.

The output terminal 250 is configured to transmit the electric power output from the blocking unit 240 to the inverter unit 30. 3, the input unit 210 and the cutoff unit 240 are shown one by one. However, as shown in FIG. 1, the input unit 210 and the cutoff unit 240 are provided for each line input to the DC connection half unit 20, Should be connected. The output terminal 250 is connected to the cut-off portions 240 to collect the electricity and transfer the collected electricity to the inverter unit 30. Therefore, the output terminal 250 is preferably formed of a member for high current.

Here, the input unit 210 and the blocking unit 240 may be modularized in one substrate. In this case, the output unit 250 separately formed from the substrate may be connected to the substrate using a physical connection member.

On the other hand, the communication unit 260 determines whether or not the failure T1 of the failure detector 120 (see Fig. 1), the detection result T2 of the detector 220, the charging state T3 of the charger 230, And receives the operation state T4 of the unit 240 and provides the operation state to the administrator. The manager checks whether the plurality of unit solar cell UN is defective (T1), the detection result (T2) of the state value of electricity flowing through the line input to the shutoff unit 240, A charging state T3 of the shutoff unit 240 and an operation state T4 of an opening and a short circuit of the shutoff unit 240 are used as data for totally managing the photovoltaic power generation system.

The solar power generation system according to the embodiment of the present invention can monitor the overall operation state of the solar power generation system, thereby providing an environment for smartly managing the solar power generation system.

Although not shown in the drawing, the blocking unit 240 is basically provided with a normal fuse member connected between the input unit 210 and the output terminal 250. In addition, the blocking unit 240 according to the embodiment of the present invention further includes a redundancy fuse member and a control unit in addition to the normal fuse member.

Here, the normal fuse is a fuse used when the solar power generation system according to the embodiment of the present invention is installed. That is, a normal fuse member is used until the fuse is blown off due to abnormal conditions after the solar power generation system is installed.

Then, when the normal fuse member is disconnected due to the abnormal symptom, the manager generally dispatches the normal fuse member to replace the normal fuse member. If it is not immediately replaced, the power produced before the replacement is not transmitted to the inverter unit 30, so quick dispatch and replacement work is the first method to prevent power waste. However, there is a possibility that the manager's operation may be delayed depending on the situation, and the configuration for this is a redundancy fuse member.

The redundancy fuse member selectively connects between the input unit 210 and the output terminal 250 by a control unit under the control of the administrator. When the redundant fuse member is connected by the manager, the photovoltaic power generation system can operate normally as in the conventional case. Of course, when an unexpected state occurs again, the redundancy fuse member is also broken like the normal fuse member. However, the administrator can manage the time accordingly.

At this time, whether or not the redundancy fuse member is connected is preferably determined based on a result of analyzing the overall operation information of the photovoltaic power generation system provided to the manager in the communication unit 260. After the connection of the redundancy fuse member is determined, the control of the blocking unit 240 is controlled remotely to connect the redundancy fuse member.

The solar power generation system according to the embodiment of the present invention can use a redundancy fuse member in place of the normal fuse member when the normal fuse member and the redundancy fuse member are provided. This replacement operation is possible because the solar power generation system according to the embodiment of the present invention can monitor not only the outside but also the inside of the system, thereby allowing the administrator to minimize the system management time.

The blocking unit 240 further includes a blocking member (not shown) for blocking the blocking unit 240 and the output unit 250 when the current flows back through the output unit 250.

The blocking member is preferably formed in an anti-fuse type. That is, at first, the blocking member is short-circuited between the blocking unit 240 and the output terminal 250, and when the predetermined voltage is applied to both ends by the control unit (not shown), the blocking member is opened. Here, the control unit is configured to detect a current flowing back to the blocking unit 240 and to apply a predetermined voltage across the blocking member.

For reference, when the inverter unit 30 of FIG. 1 fails, an AC current may flow back to the DC connection half unit 20, and the control unit detects the AC current flowing backward and opens the blocking member. Accordingly, in the solar power generation system according to the embodiment of the present invention, when the inverter unit 30 fails, the AC current that flows back to the shutoff part 240 of the DC connection half unit 20 is blocked, The cause of the failure can be eliminated.

The embodiments and the accompanying drawings described in the present specification are merely illustrative of some of the technical ideas included in the present invention. Therefore, it is to be understood that the embodiments disclosed herein are not for purposes of limiting the technical idea of the present invention, but rather are not intended to limit the scope of the technical idea of the present invention. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: solar cell module array
20: DC connection half unit
30: inverter unit

Claims (7)

1. A solar cell module comprising: a plurality of solar cell modules including a plurality of unit solar cells and a solar cell module array for collecting sunlight through the plurality of unit solar cells to produce electricity;
A connection half unit for collecting the electricity produced in the solar cell module array and producing it as DC power; And
And an inverter unit for converting the DC power into AC power and outputting the AC power to the outside,
Each of the plurality of solar cell modules
A plurality of solar cell modules connected to the solar cell module through a row line and a column line, the number of which is equal to or less than the number of the plurality of unit solar cell cells of the corresponding solar cell module, And a detection unit,
The connection half unit
And a communication unit for externally communicating whether or not a defect generated in the defect detection unit is provided to an administrator
Solar power system.
The method according to claim 1,
The connection half unit includes:
An input unit for receiving electricity generated from the solar cell module array;
A detecting unit for detecting a state value of electricity output from the input unit;
A charging unit connected to the input unit and charging the electricity input through the input unit in response to the detection result of the detection unit; And
And a blocking unit for blocking the input unit and the output terminal when the voltage level of the electric power output from the input unit becomes higher than a predetermined voltage level
Solar power system.
3. The method of claim 2,
Wherein the input unit and the blocking unit are formed in a modular fashion on a substrate,
And the output terminal including the high current member is connected to one end of the substrate
Solar power system.
3. The method of claim 2,
The communication unit is configured to receive the detection result of the detection unit, the charging state of the charging unit, and the operation state of the blocking unit and provide the received information to the manager
Solar power system.
3. The method of claim 2,
The cut-
A normal fuse member connected during normal operation;
A redundancy fuse member selectively connected between the input unit and the output terminal after the normal fuse member is cut off; And
And a control unit for connecting the redundancy fuse member instead of the normal fuse member under the control of the manager
Solar power system.
3. The method of claim 2,
And a blocking member of an anti-fuse type formed between the blocking portion and the output terminal
Solar power system.
The method according to claim 6,
And a control unit for detecting a current flowing back to the blocking unit and opening the blocking member
Solar power system.

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