KR102546243B1 - Arc detection cutoff device of photovoltaic module connector band using HF sensor and carrier frequency and method thereof - Google Patents

Abstract

The present invention includes one or more circuit breakers for blocking wires between the solar cell array 20 and the inverter 30; A plurality of HF sensors (Hydrogen Fluoride Sensor) installed on wires to detect high-frequency signals; a carrier driver 130 that transmits and receives a carrier wave to a wire, detects an arc frequency from the received carrier wave, and outputs carrier sensing data; and a calculation member 300 that synthesizes the sensing data of the HF sensors HF1 and HF2 and the sensing data of the carrier driver 130 and controls the circuit breaker 400 to shut off when an arc is detected. It relates to an arc detection and blocking device for a solar connection panel of a connection panel using an HF sensor including a carrier frequency.

Description

Arc detection cutoff device of photovoltaic module connector band using HF sensor and carrier frequency and method thereof}

The present invention relates to an arc detection and blocking device and method for a solar cell junction panel using a HF sensor and a carrier frequency.

FIG. 1 is a graph showing an example of a set of frequencies included in a cable on the DC side of a connecting board, and FIG. 2 is a block diagram showing a solar cell array, a connecting board, and an inverter.

Referring to FIGS. 1 and 2 , the solar cell connection board 10 integrates DC output from the plurality of solar cell arrays 20 and outputs the integrated DC to the inverter 30 . A DC cable is connected between the solar cell array 20 and the connection board. Here, the solar cell arc is a kind of discharge phenomenon that occurs in a circuit in which direct current flows, and may occur through a ground wire or may occur due to a long-term carbonization phenomenon due to twisting and aging of the wire, which may cause the wire to lose insulation.

As the arc is accompanied by strong light emission and a high temperature of thousands of degrees, it is important to block it as quickly as possible at the same time as it occurs to prevent it from leading to a fire.

Among the conventional technologies for detecting solar cell arcs in the connection panel 10, in detecting arc faults, a coil is wound around an iron core made of a special material, connected in series to a circuit like a CT, and an arc generation frequency is detected in case of an arc failure. When an arc occurs, a high-frequency measurement value from a sensor, about 1 mega health, is detected, and a resolution method is applied to find an arc fault.

However, in the prior art, although the time to arc detection satisfies the UL1699B safety standard of 57 mS, the frequency band is too high and the detection time is slow.

In addition, conventionally, a technique for detecting and blocking an arc discharge accident in 0.25 seconds or less has been proposed. However, the prior art as described above is known as a trend in which malfunctions frequently occur in foreign countries because the technology related to detecting and blocking DC arcs is not perfect.

In addition, the inverter 30 manufactured recently avoids installation of a backflow diode because of overheating, so when an arc is generated in the middle of the solar cell lead line, the power plant operation must be stopped due to a backflow phenomenon.

That is, as shown in FIG. 1, in the cable connected to the connection board 10, various shapes of noise are mixed depending on whether the switch is opened or closed or other loads are operated, and it is difficult to detect an accurate arc in such noise. It is a very difficult task, and it is urgent to develop a technology that can completely solve this problem.

KR 10-1677930 B1(2016.11.15)

An object of the present invention is to provide an arc detection and blocking device and method for a solar junction box using an HF sensor and a carrier frequency capable of accurate arc detection even when various high-frequency components are contained in a DC-side power cable in a solar junction box. do.

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

An embodiment of the present invention includes one or more breakers for blocking the wire between the solar cell array and the inverter, a plurality of HF sensors (Hdrogen Fluoride Sensor) installed on the wire to detect high-frequency signals, transmitting and receiving carrier waves on the wire And, a carrier driver for detecting the arc frequency from the received carrier and outputting carrier detection data, and synthesizing the detection data of the HF sensors (HF1 and HF2) and the detection data of the carrier driver to control the circuit breaker to be cut off when an arc is detected. It is possible to provide an arc detection and blocking device of a solar connection panel of a connection panel using an HF sensor including a calculation member and a carrier frequency.

In the above embodiment, the HF sensor includes a first HF sensor and a second HF sensor, and the first HF sensor and the second HF sensor are connected in parallel to the ground line.

In addition, the first HF sensor and the second HF sensor are characterized in that a coil is wound around a ring of a high-frequency iron core.

In addition, an embodiment of the present invention may further include a plurality of CT sensors (Current Transformer Sensor) and a data synthesis unit that synthesizes sensing data of the CT sensors and sensing data of the carrier driver and outputs the synthesized data to the calculation member.

The above embodiment further includes a third low-frequency filter for filtering harmonic noise from sensed data of the CT sensor and a first amplifier for amplifying the sensed data that has passed through the third low-frequency filter and outputting the amplified result to the data synthesis unit.

In the above embodiment, the arithmetic member comprises a first synthesis module for synthesizing the detected data and reference signal of the HF sensor and the synthesized data output from the data synthesizer, and an arithmetic module for blocking and controlling the circuit breaker according to the detection signal of the first synthesizing module. can include

Another embodiment of the present invention, a) receiving the detection data of a plurality of CT sensors installed in a plurality of circuit breakers each blocking the wires connected to the load and the carrier wave transmitted to the wires, mixing, demodulating and detecting the arc frequency band synthesizing the included carrier detection data, b) synthesizing the detection data including the high frequency detection signals of the HF sensors, the reference signal, and the synthesized data output from the data synthesis unit in step a), c) a calculation module In the synthesized data of step b), when an arc is detected, a step of controlling a circuit breaker may be included.

Therefore, the present invention has an effect of improving safety by preventing failure and fire by enabling accurate arc detection in a distribution box to which a plurality of loads are connected, and enabling construction at a lower cost.

1 is a graph showing an example of a set of frequencies included in a cable on the DC side of a connecting board.
2 is a block diagram showing a solar cell array, a connecting board, and an inverter.
3 is a block diagram showing an arc detection and blocking device for a solar cell connecting panel using an HF sensor and a carrier frequency according to the present invention.
4 is a detailed view of FIG. 3 .
5 is a schematic diagram illustrating another embodiment of the present invention.
6 is a flowchart illustrating a method of detecting and blocking an arc of a solar cell connection panel using a HF sensor and a carrier frequency according to the present invention.
7 is a flowchart illustrating step S100.
8 is a flowchart illustrating step S200.
9 is a flowchart illustrating step S300.
10 to 14 are photographs of measured waveforms.

Hereinafter, an embodiment of the present invention will be described in detail through exemplary drawings. However, this is not intended to limit the scope of the present invention.

In adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description will be omitted.

In addition, the size or shape of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms specifically defined in consideration of the configuration and operation of the present invention are only for describing the embodiments of the present invention, and do not limit the scope of the present invention.

FIG. 3 is a block diagram showing an arc detection and blocking device for a solar junction panel using a HF sensor and a carrier frequency according to the present invention, and FIG. 4 is a detailed view of FIG. 3 .

2 and 3, the present invention is characterized in that a plurality of circuit breakers 400 are controlled to cut off the solar cell array 20, the inverter 30, and the external power line by detecting an arc in the connection panel. .

Specifically, the present invention relates to a sensor member 100 having a HF sensor unit 110, a current sensor unit 120, and a carrier wave driver 130 in the connection board 10, a filter unit 210, and an amplification unit 220 ) And a signal processing member 300 including a data synthesis unit 230, a calculation member 300, a main circuit breaker (M), a plurality of circuit breakers 400 and a reference signal generator 500 may be included. there is.

The filter unit 210, the amplification unit 220, and the data synthesis unit 230 may be installed as one control board.

In addition, the reference signal generation unit 500 is connected to an external system power line to supply power to the control board and simultaneously generates and outputs a square wave reference signal. To this end, the reference signal generator may include a photoelectric conversion module and a buffer.

The HF sensor unit 110 has a hydrogen fluoride sensor and includes a plurality of HF sensors HF1 and HF2 that sense high frequencies included in the wire. Here, the HF sensor unit 110 includes a first HF sensor HF1 for detecting the high frequency of the first wire and a second HF sensor HF2 for detecting the high frequency of the second wire.

Here, the first HF sensor HF1 and the second HF sensor HF2 are installed on a line between the solar cell array 20 and the inverter 30, and are connected in parallel to a ground line and/or a charging unit (not shown).

Preferably, the output line for outputting the detection data (high frequency detection signal) of the first HF sensor HF1 and the second HF sensor HF2 is made of a material having a lower frequency characteristic than ferrite. This is to prevent signal loss due to impedance resistance.

That is, the first HF sensor HF1 and the second HF sensor HF2 may be manufactured to detect high frequencies by induction current by winding a coil around a ring of a high frequency iron core.

In addition, the first HF sensor HF1 and the second HF sensor HF2 are respectively provided on the N line and the P line of the primary line of the inverter 30, for example. As shown in FIG. 1, this is to remove frequencies caused by innumerable harmonics.

For example, when HF sensors are installed in parallel pairs, they serve as a group of ZCTs, so when various frequencies above the audible frequency generated by reverse flow in the inverter 30 cross from the minus band to the plus band, the same size A pulse with a periodic function of can be extinguished by Faraday's law of electromagnetic induction.

However, a strong spark is generated in the arc depending on the resistance of the ground contact failure, and an arc fault necessarily exists in the distorted frequency of the current flowing as the wire melts due to high heat.

Therefore, the HF sensors HF2 and HF2 are connected in parallel to remove all periodic functions of noise included in the DC power supply and detect only the intrinsic arc fault leading to fire. However, when checking FIG. 11 , noise can be confirmed in the pre-arc situation or in the entire high-frequency sensor waveform (detection data of the HF sensor). That is, unnecessary noise cannot be completely removed between 1° and 180° of a cycle based on the power company standard.

Therefore, the present invention applies a carrier wave (carrier frequency) described later as an alternative to this. This will be explained through the carrier driver 130 below.

The current sensor unit 120 includes a ZCT sensor 122 and a plurality of CT sensors (Current Transformer Sensors) 121 .

The double ZCT sensor 122 senses leakage current between the solar cell array 20 and the inverter 30 . The ZCT sensor 122 outputs leakage current detection data to the calculation member 300 .

The CT sensor 121 is installed on a wire connected to the circuit breaker 400 of the wire on the inverter 30 side and outputs sensing data. Here, the calculation member 300 may detect the arc using the current fluctuation rate sensed by the CT sensor 121 .

The carrier driver 130 transmits a carrier wave on the second wire and receives the carrier wave on the first wire. Such a carrier wave includes an arc frequency when an arc is generated, and is combined with high-frequency detection data of the HF sensor unit 110 and current fluctuation rate detection data of the CT sensor 121 to accurately detect an arc.

The carrier driver 130 includes, in detail, a carrier transmission module 131 outputting a carrier wave to a second wire, a first oscillation module 132 oscillating and modulating a carrier wave, and a carrier receiving module 133 receiving a carrier wave on the first wire. ), a demodulation module 135 that mixes and demodulates the carrier wave reception data of the carrier wave reception module 133, and a second oscillation module 134 that reproduces the carrier wave output from the carrier wave transmission module 131.

The carrier wave transmission module 131 outputs the carrier wave to the second wire. The carrier wave may include an arc frequency when an arc occurs in wires connected to each solar cell array 20 like PLC communication.

The first oscillation module 132 oscillates the carrier wave as described above, and the carrier transmission module 131 processes the carrier wave at a frequency oscillated by the first oscillation module 132 and irradiates the electric wire. At this time, when an arc is generated in any one of the load circuits, for example, as in wire communication, the frequency of the irradiated carrier comes back with the carrier.

The carrier wave receiving module 133 receives a carrier wave on the first wire. The carrier wave is returned including the arc frequency at which the arc will occur, and the carrier wave receiving module 133 receives it.

The demodulation module 135 drives the second oscillation module 134 to reproduce the carrier wave (carrier frequency) transmitted from the carrier wave transmission module 131, mixes the reproduced carrier wave and the received carrier wave, and detects only the arc frequency. detect arc frequency.

The demodulation module 135 mixes the frequency locally oscillated by the second oscillation module 134 and the carrier received by the carrier receiving module 133 and modulates the frequency to a new frequency (hereinafter referred to as carrier sensing data). The signal (carrier sensing data) modulated by the demodulation module 135 may be a component (arc frequency) in addition to the carrier wave transmitted on the wire.

The filter unit 210 may include a plurality of filters that limit the detected data of the CT sensor 121, the carrier wave driver 130, and the HF sensor unit 110 to a set band. In detail, the filter unit 210 includes a first low-frequency filter 211 and a second low-frequency filter 212 filtering the detected data of the first HF sensor HF1 and the second HF sensor HF2.

The first low-frequency filter 211 and the second low-frequency filter 212 filter harmonic noise with a band set in sensing data output from the first HF sensor HF1 and the second HF sensor HF2, respectively.

In addition, the filter unit 210 may include a third low-frequency filter 213 for low-frequency filtering of the detected data of the CT sensor 121 . The third low-frequency filter 213 filters harmonic noise among current sensing data output from the CT sensor 121 .

The amplifier 220 includes a high frequency error amplifier 223, a first amplifier 221 and a second amplifier 222.

The dual high frequency error amplifier 223 calculates an error between the high frequency of the first HF sensor HF1 and the high frequency of the second HF sensor HF2 passing through the first low frequency filter 211 and the second low frequency filter 212 and It is amplified and synthesized into one high-frequency signal and output.

The first amplifier 221 amplifies current sensing data of the CT sensor 121 that has passed through the third low frequency filter 213 .

The second amplifier 222 amplifies carrier sensing data that has passed through the mixing and demodulation module 135 .

The data synthesis unit 230 synthesizes current sensing data and carrier sensing data of the CT sensor 121 amplified by the first amplifier 221 and the second amplifier 222, respectively. Here, the data synthesis unit 230 outputs synthesized data only when the arc frequency is included in both the current sensing data and the carrier sensing data.

That is, the data synthesizer 230 is an AND gate and outputs synthesized data only when both signals include an arc.

The reference signal generator 500 includes a photoelectric conversion module 510 installed on the input side of the external system power and a modulation module 520 that converts and outputs the signal output from the photoelectric conversion module 510 into pulses of a set level. include The reference signal output from the modulation module 520 corresponds to the power frequency modulation of FIG. 10 .

The calculation member 300 combines the reference signal and the high frequency signal of the HF sensor 110 with the frequency counter 311 that counts the frequency of the high frequency signal of the HF sensor unit 110 output from the high frequency error amplifier 223. It includes a first synthesis module 312, an arithmetic module 340, a communication module 320, a buzzer and a temperature sensor (or thermometer).

The frequency counter 311 measures the number of pulses per set time. Such a measurement result may increase arc pulse discrimination.

The first synthesizing module 312 secondarily synthesizes the reference signal, sensed data of the HF sensor unit 110, and synthesized data of the carrier wave and the CT sensor 121. Here, the reference signal corresponds to a square wave according to photoelectric conversion in the reference signal generator 500 .

For example, the first synthesis module 312 calculates '0' when no arc is included in any one of the sensing data of the HF sensor unit 110 and the synthesis data of the carrier and CT sensor 121, and the arc component in both. It can be composed of an AND gate that outputs '1' when it is sensed. That is, the first synthesis module 312 outputs synthesis data only when arc components are detected in both input sense data.

The communication module 320 transmits an arc generation detection signal. Here, the communication module 320 is a wired/wireless communication device such as Internet TCP/IP or Wi-Fi communication, and is a communication capable terminal for receiving arc generation information such as a monitoring terminal, server, or mobile terminal located in a remote location, or a remotely located terminal. Alerts and information can be transmitted.

When synthesized data of the first synthesizing module 316 is received, the calculation module 340 calculates whether an arc is generated and controls the circuit breaker 400 to shut off. This will be described with reference to FIGS. 12 and 13 .

12 is a waveform obtained by measuring the entire waveform after arc generation, and FIG. 13 is a waveform output by detecting an arc situation caused by fluctuations in switching opening and closing. In the above situation, the calculation module 340 simultaneously operates the breaker 400 installed on the output side of the solar cell array 20, the breaker 400 installed on the input side of the inverter 30, and the breaker 400 installed on the input side of the external grid power. Control. As a result of confirmation through the measured waveform, the present invention can accurately sense the arc through the combination of the HF sensor and the CT sensor and the carrier wave.

A plurality of breakers 400 may be installed for each line between the solar cell array 20 and the inverter 30 . For example, as for the circuit breaker, the first circuit breaker MC1 is installed on the output side of the solar cell array 20, the second circuit breaker MC2 is installed on the input side line of the inverter 30, and the third circuit breaker MC2 is installed on the external system line side. A circuit breaker (MC3) may be installed.

In addition, a fourth circuit breaker MC4 may be installed on the output side (AC output) of the inverter 30 .

Such a plurality of breakers 400 can be selectively controlled according to whether the calculation module 340 detects an arc.

The above description describes an embodiment of detecting an arc in a line between the solar cell array 20 and the inverter 30 .

As shown in FIG. 5 , a plurality of solar cell arrays 20 may be connected to one inverter 30 . Therefore, each solar cell array 20 is connected to the inverter 30 through a separate line. Therefore, the present invention can be connected to detect an arc for each connection wire of each solar cell array 20, and the calculation member can selectively block and/or release individual wires of a plurality of solar cell arrays 20.

The present invention includes an arc detection blocking method of a solar panel using a HF sensor and a carrier frequency achieved through the above configuration, which will be described with reference to FIGS. 6 and 7 .

6 is a flowchart of a multi-channel arc detection and blocking method using a HF sensor and a carrier frequency according to the present invention.

Referring to FIG. 6 , the present invention includes a step S100 of synthesizing the CT sensor 121 sensed data and the received carrier sensed data, and a step S200 of synthesizing the sensed data of the HF sensor unit 110 and the synthesized data of step S100. , a step S300 of detecting an arc in the synthesized data of step S200, and a step S400 of controlling a circuit breaker when an arc is detected in step S300.

Of these, step S100 will be described with reference to FIG. 7 and step S200 with reference to FIG. 8, respectively.

7 is a flowchart illustrating step S100.

Referring to FIG. 7 , step S100 includes a step S111 filtering CT sensor 121 sensed data, a step S112 amplifying the filtered CT sensor 121 sensed data, a step S121 mixing and demodulating carrier wave received data, and a demodulation step. A step S122 of amplifying the received carrier data, a step S131 of synthesizing, and a step S132 of detecting an arc in the synthesized data.

Step S111 is a step of outputting the sensed data output from the CT sensor 121 as frequencies other than commercial frequencies through the third low-frequency filter 213 .

Step S112 is a step of amplifying the sensed data of the CT sensor 121 that has passed through the third low-frequency filter 213 in the first amplifier 221 and outputting the amplified data to the data synthesis unit 230 .

Step S121 is a step of mixing and demodulating carrier wave received data. Here, the carrier wave driver 130 outputs a carrier wave to the wire as a frequency oscillated by the first oscillation module 132 in the carrier wave transmission module 131 . The carrier receiving module 133 receives the carrier from the wire, and the demodulation module 135 mixes and demodulates the frequency locally oscillated by the second oscillation module 134 to detect and output a frequency other than the carrier.

Step S122 is a step of amplifying the carrier sensing data output from the demodulation module 135 in the second amplifier 222 . The second amplifier 222 amplifies the carrier sensing data and outputs it to the data synthesis unit 230 .

Step S131 is a step of synthesizing the sensing data of the CT sensor 121 and the carrier wave reception data in the data synthesis unit 230 .

In step S132, when the data synthesis unit 230 detects an arc in both the CT sensor 121 detection data and the carrier wave reception data, it outputs synthesis data to the first synthesis module 312.

8 is a flowchart illustrating step S200.

Referring to FIG. 8 , step S200 includes step S211 of filtering the detected data of the HF sensor unit 110, step S212 of amplifying the filtered detected data of the HF sensor unit 110, and synthesis of the reference signal and step S100. A step S213 of synthesizing the data and the amplified HF sensor detection data and a step S214 of detecting an arc from the synthesized data.

Step S211 is a step of low-frequency filtering the sensed data of the HF sensor unit 110. Here, the HF sensor unit 110 has a first HF sensor HF1 and a second HF sensor HF2 connected in parallel, and outputs sensing data to the first low-frequency filter 211 and the second low-frequency filter 212, respectively. . Accordingly, the first low-frequency filter 211 and the second low-frequency filter 212 remove harmonic noise except for the low-frequency band set in the sensing data of the HF sensors.

Step S212 is a step of calculating and amplifying errors of detected data of the HF sensor filtered by the first low-frequency filter 211 and the second low-frequency filter 212, respectively. The high-frequency error amplifier 223 calculates errors of the sensed data of the HF sensor filtered by the first low-frequency filter 211 and the second low-frequency filter 213, respectively, and amplifies the difference to output as one sensed data.

Step S213 is a step of synthesizing the synthesized data of step S100, the reference signal, and the sensed data of the HF sensor in the first synthesizing module 312. The first synthesizing module 312 synthesizes the synthesized data synthesized in step S100, the filtered sensing data of the HF sensors HF1 and HF2, and the reference signal.

Here, the first synthesis module 312 outputs the synthesis data to the first synthesis module when an arc is detected among the synthesized data.

Step S300 is a step in which the calculation module 340 receives the synthesis data of the first synthesis module 312 and detects an arc. Here, the first synthesis module 312 outputs synthesis data if an arc is included in the synthesis data of step S100 and the sensing data of the HF sensor.

In step S400, when an arc is detected in the calculation module 340, the circuit breakers MC1 and MC2 between the solar cell array 20 and the inverter 30, or the circuit breaker MC3 connected to the external grid power, and the inverter 30 ) is a step of controlling to block at least one of the output side circuit breakers (MC4). Here, the arithmetic module 340 may selectively control the circuit breaker 400 in which the arc is detected, or control all circuit breakers 400 to operate at the same time.

For example, when an arc is detected in any one of the wires extending for each of the plurality of solar cell arrays 20 as shown in FIG. 5, the calculation module 340 can selectively control only the circuit breaker 400 installed on the corresponding wire. there is.

In addition, the arithmetic module 340 activates the buzzer 330 to alarm arc generation, transmits an alarm to a remotely located monitoring terminal through the communication module 320, or remotely operates a remotely located communicable alarm. You can control it.

As described above, the present invention synthesizes the current fluctuation rate of the CT sensor and the sensed data included in the received carrier wave in the connection board connecting the plurality of solar cell arrays 20 and the inverter 30 so as to be energized. When arcs are included in the recorded data, more accurate arc detection is possible in any environment as the final decision is made whether or not to detect arcs by synthesizing them with the high-frequency detection data of the HF sensor.

In addition, in the above-described method description, signs indicating steps or the order of description do not limit the scope of the invention, and can be changed according to embodiments.

Although the present invention has been shown and described in relation to specific embodiments, it is known in the art that the present invention can be variously improved and changed without departing from the technical spirit of the present invention provided by the claims below. It will be self-evident to those skilled in the art.

100: sensor member 110: HF sensor unit
120: current sensor unit 121: CT sensor
122: ZCT sensor 130: carrier wave driver
131: carrier transmission module 132: first oscillation module
133: carrier wave reception module 134: second oscillation module
135: demodulation module 200: signal processing member
210: filter unit 211: first low-frequency filter
212: second low-frequency filter 213: third low-frequency filter
220: amplifier 221: first amplifier
222: second amplifier 223: high frequency error amplifier
230: data synthesis unit 300: calculation member
311: frequency counter 312: first synthesis module
320: communication module 330: buzzer
340: calculation module HF1, HF2: HF sensor
400, MC1, MC2, MC3, MC4: Breaker
500: reference signal generator

Claims (10)

One or more circuit breakers that cut off the wires between the solar cell array 20 and the inverter 30;
A plurality of HF sensors (Hydrogen Fluoride Sensor) installed on wires to detect high-frequency signals;
a carrier driver 130 that transmits and receives a carrier wave to a wire, detects an arc frequency from the received carrier wave, and outputs carrier sensing data;
a calculation member 300 that synthesizes the sensing data of the HF sensors HF1 and HF2 and the sensing data of the carrier driver 130 and controls the circuit breaker 400 to shut off when an arc is detected;
A plurality of CT sensors (Current Transformer Sensor) 121 installed in the circuit breaker 400; and
a data synthesis unit 230 synthesizing sensing data of the CT sensors 121 and sensing data of the carrier wave driving unit 130 and outputting the synthesized data to the calculation member 300; including,
The calculation member 300 is
a first synthesizing module 312 that synthesizes the detected data of the HF sensor and the reference signal and synthesized data output from the data synthesizer 230; and
An arithmetic module 340 for blocking and controlling the circuit breaker 400 according to the detection signal of the first synthesis module 312; An arc detection and blocking device for a photovoltaic junction panel using an HF sensor and a carrier frequency including a.
The method according to claim 1, the HF sensor
It is installed on each wire and includes a first HF sensor (HF1) and a second HF sensor (HF2),
The first HF sensor (HF1) and the second HF sensor (HF2) are connected in parallel to the ground line; An arc detection and blocking device for a solar panel using a HF sensor and a carrier frequency.
The method according to claim 2, the first HF sensor (HF1) and the second HF sensor (HF2)
winding a coil on a ring of high-frequency iron core; An arc detection and blocking device for a solar panel using a HF sensor and a carrier frequency.
delete The method of claim 1,
a third low-frequency filter 213 filtering harmonic noise from the sensing data of the CT sensor 121; and
A first amplifier 221 that amplifies the sensing data that has passed through the third low-frequency filter 213 and outputs the amplified data to the data synthesis unit 230; Arc detection and blocking device of a solar junction panel using a HF sensor and a carrier frequency.
The method of claim 2,
a first low-frequency filter 211 filtering harmonic noise from the detected data output from the first HF sensor HF1;
a second low frequency filter 212 filtering harmonic noise from the sensed data output from the second HF sensor HF2; and
a high-frequency error amplifier for calculating and amplifying the error of the sensed data filtered by the first low-frequency filter 211 and the second low-frequency filter, respectively, and outputting the result to the calculation member 300; An arc detection and blocking device for a photovoltaic junction panel using a HF sensor and a carrier frequency further comprising a.
delete a) The detection data of the plurality of CT sensors 121 installed in the plurality of circuit breakers 400 that block the wires connected to the load and the carrier wave transmitted to the wires are received, mixed, demodulated, and detected to include the arc frequency band synthesizing the detected carrier sensing data;
b) synthesizing the detection data including the high-frequency detection signals of the HF sensors, the reference signal, and the synthesized data output from the data synthesis unit 230 in step a); and
c) controlling the circuit breaker 400 when an arc is detected in the synthesized data of step b) in the calculation module 340; including,
a) step
When the arc frequency is included in both the detection data of the CT sensor and the carrier detection data, synthesized data is output,
b) step
outputting synthesized data when an arc component is detected in both the detected data of the HF sensor unit 110 and the synthesized data of the carrier wave and CT sensor 121 in step a); A method for detecting and blocking an arc of a solar panel using an HF sensor and a carrier frequency,
The method of claim 8, in step a)
Sensing data of the CT sensor 121 is output to the data synthesis unit 230 after filtering and amplifying noise; A method for detecting and blocking an arc in a solar panel using an HF sensor and a carrier frequency.
The method according to claim 8, in step b), the sensing data of the HF sensor
Outputs from the first HF sensor HF1 and the second HF sensor HF2 connected in parallel are each harmonic noise filtered and error amplified; A method for detecting and blocking an arc in a solar panel using an HF sensor and a carrier frequency.

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