KR101298559B1 - Apparatus for monitering solar cell pannel having detecting device of flame - Google Patents

Abstract

PURPOSE: A monitoring device of a solar cell panel including a flame sensor is provided to maintain a constant power generation amount by quickly checking a solar cell having abnormality and washing the same. CONSTITUTION: A monitoring device (1) of a solar cell panel includes cell arrays (S1-S4), a supply board (3), a flame sensor (4), a detecting unit (5), a washing unit (9), and a control unit (6). The cell arrays combine cell modules converting sunlight into power and outputting the same. A connection board supplies the power generated in the cell arrays. The flame sensor is included in the connection board to sense flames. The detecting unit is included in the connection board to detect a voltage value from each cell array. The washing unit washes an abnormal cell module determined by a signal of the detecting unit. The control unit determines abnormality depending on whether a voltage value detected by transceiving a signal with the flame sensor, the detecting unit, and the washing unit is out of a reference value. [Reference numerals] (AA) Connection board; (BB) Inverter; (CC) Power board; (DD) Load

Description

Apparatus for monitering solar cell pannel having detecting device of flame}

The present invention relates to a monitoring device for a solar cell panel, and more particularly, by comparing voltage values of a plurality of solar cell panels, a solar cell capable of quickly identifying and maintaining an abnormality and rapidly detecting a flame. It relates to a monitoring device of the panel.

In general, photovoltaic power generation is an inverter converts a direct current generated from a solar panel into an alternating current to supply to each customer.

Such photovoltaic power generation may be generally performed by a system consisting of a plurality of solar cell panels, a connection panel, and an inverter.

Therefore, a monitoring function that can determine whether or not normal in the situation room for the entire photovoltaic power generation system is required.

Such a monitoring system designates a group in a solar panel composed of a plurality of solar cells, and has a communicator for each group or for each cell, and can monitor for abnormalities in the management server through the communicator.

In addition, the connection panel is provided with a flame detection sensor to detect the presence of a fire. In other words, there is a risk of fire if the connection panel is overloaded due to excessive power generation of photovoltaic power generation, a flame detection sensor is required to detect this in advance.

However, such a conventional monitoring system has a problem in that reliability is lowered due to a high frequency of malfunction when detecting a flame.

In addition, it is difficult to confirm the failure of a plurality of battery cells, and there is a problem that all solar panels must be inspected to determine whether there is a failure.

Patent Application No. 2012-109761 (Name: Fire Detection Device)

Therefore, the present invention has been proposed to solve the above problems, an object of the present invention can easily detect the flame of the connection panel, and also can quickly grasp the maintenance of the abnormality of the solar panel and maintain it. It is to provide a solar panel.

In order to achieve the above object, an embodiment of the present invention comprises at least one cell array is combined with a cell module for converting and outputting sunlight to a power source; A connection panel to which power generated in the cell array is supplied;

A flame detection unit provided in the connection panel and detecting a flame;

A detection unit provided in the connection panel and detecting a voltage value from each cell array;

A washing unit for washing the cell module determined to be abnormal by the signal of the detection unit; And

The apparatus for monitoring a solar cell panel includes a flame detector, a detector, and a controller configured to determine whether or not an abnormality is detected based on whether or not a voltage value detected by transmitting and receiving a signal from a washing unit is out of a reference value.

As mentioned above. The monitoring device of a solar panel according to the present invention has the following advantages.

First, there is an advantage that can minimize the occurrence of malfunction by improving the structure of the flame detection sensor.

Second, by placing resistors on the entry and exit of each solar cell and measuring the voltage value, there is an advantage that the amount of power generated can be kept constant by quickly identifying and cleaning the solar cell that has an abnormality.

Third, by placing the over-current blocking unit and the trip device in the connection panel, there is an advantage that can block the over-current due to excessive power production of photovoltaic power generation.

1 is a view schematically showing an entire system of a solar panel according to an embodiment of the present invention.
FIG. 2 is a diagram schematically illustrating a structure of a flame detector shown in FIG. 1.
FIG. 3 is a view schematically illustrating a washing apparatus of the solar panel shown in FIG. 1.
4 is a view showing a channel portion of the connection panel shown in FIG.
FIG. 5 is a diagram illustrating a detector disposed in the connection panel shown in FIG. 1.
FIG. 6 is a view schematically illustrating a control unit structure of the connection panel shown in FIG. 1.
7 is a diagram schematically illustrating a structure of an overcurrent blocking unit.

Hereinafter, a monitoring apparatus for a solar cell panel according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figures 1 to 6, the monitoring device 1 of the solar panel proposed by the present invention is a combination of solar cells (C1, C2 ... C20) for converting and outputting sunlight to power At least one cell array (S1, S2, S3, S4);

A connection panel 3 to which power generated in the cell array is supplied;

A flame detector (4) provided in the connection panel (3) for detecting a flame;

A detection section (5) provided in the connection panel (3) for detecting a voltage value from each cell array (S1, S2, S3, S4);

A washing unit 9 for washing the solar cells C1, C2... C20 determined as abnormal by the signal of the detection unit 5; And

The flame detection unit 4, and the control unit 6 for determining whether there is an abnormality by whether or not the voltage value detected by transmitting and receiving signals from the detection unit 5 and the washing unit 9 is out of the reference value.

In the solar panel having such a structure, the cell array (S1, S2, S3, S4) has a structure in which a plurality of solar cell (C1, C2 ... C20) is combined with each other. Therefore, the power generated in each of the cell arrays S1, S2, S3, and S4 is supplied to the detection unit 5 through the channel unit 15 of the connection board 3.

In this case, the channel unit 15 is composed of a plurality of channels 15, and about 20 cell arrays S1, S2, S3, and S4 are connected to one channel.

And the flame detection unit 4, as shown in Figure 2, the ultraviolet sensor 7 for detecting the ultraviolet light generated from the flame; An amplifier 8 for amplifying the signal; A converter 10 for converting an analog signal into a digital signal; An optical sensor 14 for detecting light emitted from the flame; It includes a transmission unit 16 for receiving a signal from the ultraviolet sensor 7 and the optical sensor 14 and transmits the signal to the control unit 6 to determine whether the flame.

In the flame detection unit 4, the ultraviolet sensor 7 is a sensor for detecting ultraviolet light of the 180 ~ 270nm wavelength band emitted from the flame.

In general, when looking at the wavelength region generated by the flame, there is a unique wavelength band of 180 to 270 nm wavelength band, which is distinguished from the wavelength region such as sunlight and halogen lamps in the ultraviolet region.

The ultraviolet sensor 7 of the present invention detects the ultraviolet wavelength unique to the flame to determine the presence of the flame.

Various sensors may be used as the ultraviolet sensor 7, but a semiconductor sensor and a UV Tron sensor are mainly applied.

In addition, the amplifier 8 is connected to the ultraviolet sensor 7 to amplify the sensor output. This amplifier 8 is composed of a conventional amplifier circuit, that is, a circuit using two differential amplifiers in series.

The converter 10 is a circuit for converting the output of the amplifier stage into a digital signal. The converter 10 converts an analog signal generated according to the size of the flame into a digital signal.

In addition, the optical sensor 14 may detect whether the spark is actually generated by detecting the light emitted from the spark.

That is, the ultraviolet sensor 7 detects the frequency of a specific band of sunlight to determine whether a spark has occurred. In this case, the frequency of the specific band is not necessarily generated only from the flame, but from another light source. It may also occur and cause a malfunction.

Therefore, in order to prevent such a malfunction, in the present invention, the optical sensor 14 may be additionally provided to detect the actual light emitted from the flame, thereby secondarily detecting the occurrence of the flame.

The transmitter 16 is connected to the ultraviolet sensor 7 through the converter 10 and to the optical sensor 14.

Therefore, the transmitter 16 receives both the signal transmitted from the ultraviolet sensor 7 and the signal transmitted from the optical sensor 14.

The transmitter 16 transmits a signal to the controller 6, and the controller 6 receives a signal received from the ultraviolet sensor 7 and a signal received from the optical sensor 14, as described later. By comparing with, it is determined whether a spark has occurred and if so, whether it is a real flame.

Meanwhile, power supplied from the cell arrays S1, S2, S3, and S4 to the channel unit 15 is supplied to the detector 5, and the detector 5 is disposed in the connection panel 3, and each cell array S1 is provided. Based on the voltage values supplied from S2, S3, and S4, the abnormal solar cell C1, C2, C20 is determined.

The detector 5 includes a pair of side resistances 23 and 25 connected to one end of each solar cell C1, C2 ... C20, respectively; A pair of output resistors 26 and 28 connected to the other end, respectively; Voltage branch points 27 and 29 branched between the entry and exit resistors 23, 25, 26 and 28, respectively; A MUX 20 to which voltages of the respective solar cells C1, C2, ... C20 are inputted; A / D converter 21 is included.

In the pair of entrance and exit resistances, the entrance resistances of the solar cells C1, C2 ... C20 are the first resistor 23 and the second resistor 25, and the solar cells C1, C2. The exit resistance of C20) is the third resistor 26 and the fourth resistor 28.

In addition, the voltage branch point connected between the first resistor 23 and the second resistor 25 is the first voltage branch point 27, and the voltage branch point connected between the third resistor 26 and the fourth resistor 28. Is the second voltage branch point 29.

In this case, the voltage values of the first voltage branch point 27 and the second voltage branch point 29 may be calculated by the following equations, respectively.

V1 = (V1 * R2) / (R1 * R2) -------------- Equation 1

V2 = (V2 * R4) / (R3 * R4) ---------------- Equation 2

(V1: voltage value of the first voltage branch point R1: first resistor R2: second resistor

V2: voltage value of the second voltage branch point R3: third resistor R4: fourth resistor)

The voltage values of the first and second voltage branch points 27 and 29 as described above are input to the MUX 20.

In this manner, resistors are disposed at both ends of all of the solar cells C1, C2, ... C20, and voltage branch points are disposed therebetween to obtain respective voltage values.

At this time, since each solar cell (C1, C2 ... C20) is assigned a unique number, the voltage of each solar cell (C1, C2 ... C20) is input to the MUX (20), respectively In addition, the corresponding solar cells C1, C2, C20 may be recognized.

Therefore, the controller 6 may determine the voltage values of the respective solar cells C1, C2, ... C20 based on the voltage values input to the MUX 20.

As such, the voltage value input to the MUX 20 is transmitted to the control unit 6, and the control unit 6 calculates the voltage value and compares the result value with a previously input reference value to determine whether or not the reference value is different. To judge.

In more detail, as shown in FIG. 5, the control unit 6 includes a MUX 20, an input unit 39 for inputting a voltage value and a signal from the flame detection unit 4; A memory 45 for storing a reference value and a reference value for spark generation in advance; A first determination unit 41 comparing the input voltage value with the reference value of the memory 45 to determine whether there is an abnormality; A second determination unit 42 determining whether sparks are generated by signals of the ultraviolet sensor 7 and the optical sensor 14 received from the transmission unit 16; A first output unit 43 for outputting a signal to the cleaning unit 9 when there is an abnormality as a result of the determination of the first determination unit 41; And a second output unit 44 for outputting a signal to the fire extinguishing unit when there is an abnormality as a result of the determination of the second determination unit 42.

In the controller 6, the maximum and minimum values of voltages generated in the solar cells C1, C2... C20 are preset in the memory 45.

In addition, the memory 45 stores a range value as a reference for determining whether a signal detected from the ultraviolet sensor 7 and the optical sensor 14 indicates the generation of a flame.

In addition, the first determination unit 41 compares the voltage value and the reference value inputted from each solar cell C1, C2 ... C20.

As a result of the comparison, when the input voltage value is out of the reference value, it may be determined that an abnormality has occurred in the corresponding solar cells C1, C2, ... C20. When an abnormality occurs in the cell, it leads to a decrease in the amount of power generation. Therefore, it is necessary to solve the abnormality of the cell promptly.

Therefore, when the controller 6 determines that the cell is abnormal, the first output unit 43 transmits a signal to the cleaning unit 9 so that the surface of the solar cell C1, C2, C20, etc. Foreign matters such as dust remaining in can be removed.

Then, the second determination unit 42 is transmitted from the ultraviolet sensor 7 to determine whether or not the digitized signal falls within a predetermined range while passing through the AD conversion unit.

If the signal falls within the predetermined range, it is primarily determined that a spark has occurred inside the connection panel 3.

In addition, the digital signal transmitted from the optical sensor 14 passes through the converter 10 to determine whether the digitized signal falls within a predetermined range.

At this time, the second determination unit 42 is in a state in which it is determined that the spark is generated by the signal received from the ultraviolet sensor 7.

In this state, when the signal received from the optical sensor 14 is within a predetermined range, it may be determined that a spark has occurred.

As described above, in the present invention, the generation of the flame can be stably sensed by overlapping the ultraviolet sensor 7 and the optical sensor 14.

In addition, when it is determined that the flame has occurred, the second determination unit 42 transmits a signal to the fire extinguisher through the second output unit 44 to extinguish the flame.

On the other hand, the washing unit 9 is disposed in the space between each cell array (S1, S2, S3, S4) at least one or more injectors 13 for spraying water to the cell array (S1, S2, S3, S4) Wow; It is connected to the injector 13 and includes a pump 11 for supplying water.

A plurality of injectors 13 are disposed and are disposed between the cell arrays S1, S2, S3, and S4, respectively, and the water injection direction is disposed toward the cell arrays S1, S2, S3, and S4. . In addition, the injector 13 may spray water by having a structure such as a spring cooler.

At this time, one solar cell (C1, C2 ... C20) constituting the injector 13 and the cell array (S1, S2, S3, S4) may correspond one-to-one, one injector 13 It may cover several solar cells (C1, C2 ... C20).

Therefore, when the control unit 6 transmits a signal to the pump 11 and the pump 11 is driven, water is pumped from the water reservoir and supplied to the injector 13, and then the solar cells C1 and C2 having abnormalities are generated. ... may be sprayed on C20).

As such, water is injected into the solar cells C1, C2 ... C20, which are abnormally generated by the water injector 13, thereby removing foreign substances remaining on the surface of the solar cells C1, C2 ... C20. Power generation can be restored to normal.

If necessary, an air injector 12 may be provided, such as the water injector 13. That is, after the water injection to the solar cells (C1, C2 ... C20), high-pressure air from the air injector 12 to remove the water remaining on the surface of the solar cells (C1, C2 .. C20) can be sprayed on the surface.

As such, by operating the water injector 13 and the air injector 12 together, foreign matter remaining on the surface of the solar cells C1, C2, C20 can be quickly removed.

In the above description, only the water injector 13 is installed alone or the water injector 13 and the air injector 12 are installed together. However, the present invention is not limited thereto, and only the air injector 12 may be provided.

That is, foreign matter remaining on the surface of the solar cells C1, C2 ... C20 may be removed by pneumatic pressure only by the air injector 12.

Thus, the water injector 13 or the air injector 12 can be selected suitably according to the specification of a photovoltaic power generation system.

On the other hand, the flame detection unit 4 is provided in the connection panel to detect the flame generated from the connection panel to prevent the fire in advance.

On the other hand, as another embodiment of the present invention, an overcurrent relay 33 (Fig. 7) may be additionally arranged in the connection panel 3.

The overcurrent blocking unit 33 is disposed inside the connection panel 3, and is connected to the channel unit 15 so that power supplied from the plurality of cell arrays S1, S2, S3, and S4 may be applied to each circuit. Over current can be cut off in advance.

In more detail, as shown in FIG. 7, the overcurrent blocking unit 33 includes: a relay circuit C1 for blocking overcurrent under predetermined control; An input current sensing circuit C2 for sensing an input current from a power line; A setting circuit C3 which sets an overcurrent value randomly; A comparison circuit C4 for comparing the sensed signal input from the input current sensing circuit with a reference voltage of a setting circuit and outputting a resultant signal; And a relay control circuit C5 for outputting a control signal for controlling the supply of current to the relay circuit when the comparison signal input from the comparison circuit is an overcurrent.

In this overcurrent interruption section, the setting circuit C3 is connected to a switch 34 protruding from the surface of the connection board 3. Thus, the user can pre-input the overcurrent value by appropriately rotating these switches 34 clockwise or counterclockwise.

In this way, the overcurrent interruption unit 33 can safely protect the circuit by blocking the overcurrent when the overcurrent is transmitted to the internal circuit of the connection panel 3 in advance.

In addition, the overcurrent blocking unit 33 may be connected to a trip device 32 disposed inside the connection panel 3 to trip the circuit when an overcurrent is applied.

The trip device 32 may be a variety of methods, such as thermal electronic (TM), fully electronic (ODP, HM), electronic.

For example, in the case of fully electronic, a current flows through the coil part. If a current above the reference value flows, a magnetic flux is generated by the principle of the electromagnet, and the plunger inside the oil dash pot (ODP) moves and moves upwards. You attract a certain amateur. The amateur then trips the breaker by moving the trip cross bar.

1: Monitoring device of solar panel
3: connection board
4: flame detector
5: detector
6:
S1, S2, S3, S4: Cell Array
C1, C2, C3, C4 ... C20: solar cell

Claims (8)

At least one cell array in which a cell module converting and outputting sunlight into a power source is combined;
A connection panel to which power generated in the cell array is supplied;
A flame detection unit provided in the connection panel and detecting a flame;
A detection unit provided in the connection panel and detecting a voltage value from each cell array;
A washing unit for washing the cell module determined to be abnormal by the signal of the detection unit; And
And a control unit for determining whether there is an abnormality based on whether the detected voltage value is out of a reference value by transmitting and receiving a signal from the flame detection unit, the detection unit, and the cleaning unit. The apparatus of claim 1, wherein the flame detector comprises: an ultraviolet sensor configured to detect ultraviolet rays generated from the flame; An amplifier for amplifying a signal; A converter for converting an analog signal into a digital signal; An optical sensor for detecting light emitted from the flame; Receiving a signal from the ultraviolet sensor and the optical sensor and transmits to the control unit for monitoring the solar cell panel including a transmission unit to determine whether the flame. The method of claim 1,
The detector includes a pair of resistors connected to one end and the other end of each solar cell, respectively; A plurality of voltage branch points each branched between the pair of resistors; MUX to which the voltage value of each solar cell is input; Monitoring device for solar panel including A / D converter. The method of claim 3,
The voltage value of the plurality of voltage branch points monitoring device of the solar panel can be respectively calculated by the following formula.
V1 = (V1 * R2) / (R1 * R2) -------------- Equation 1
V2 = (V2 * R4) / (R3 * R4) ---------------- Equation 2
(V1: voltage value of the first voltage branch point R1: first resistor R2: second resistor
V2: voltage value of the second voltage branch point R3: third resistor R4: fourth resistor) The method of claim 3,
The control unit includes a MUX, an input unit for receiving a voltage value and a signal from the flame detection unit; A memory for storing a reference value and a reference value for spark generation in advance; A first determining unit comparing the input voltage value with a reference value of the memory to determine whether there is an abnormality; A second judging unit determining whether sparks are generated by signals of an ultraviolet sensor and an optical sensor received from the transmitter; A first output unit which outputs a signal to the cleaning unit when there is an error as a result of the determination of the first determination unit; The monitoring device of the solar cell panel comprising a second output unit for outputting a signal to the fire extinguishing unit when there is an abnormality in the determination result of the second determination unit. The method of claim 1,
At least one sprayer disposed in a space between each cell array and spraying water onto the cell array; A pump connected to the injector to supply water; Monitoring device for solar panels comprising a water reservoir. 6. The method of claim 5,
The cleaning unit is a monitoring device of a solar panel further comprises an air injector. The method of claim 1,
Monitoring device for solar panels, in which an overcurrent breaker and tripping device can be further arranged.

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