KR101822820B1 - Solar power generation system that can prevent fire spread by using smart sensor - Google Patents

Abstract

The present invention relates to a photovoltaic power generation system for preventing fire spread by using a smart sensor. According to the present invention, the photovoltaic power generation system includes: multiple photovoltaic cell modules for absorbing the photovoltaic energy and converting the absorbed photovoltaic energy to the electrical energy; an inverter for converting the direct current generated by the photovoltaic cell modules to the alternating current; a junction box for collecting the direct current power between the photovoltaic cell modules and the inverter and transmitting the collected direct current power to the invert; a monitoring system for monitoring the operating state of the photovoltaic power generation system, managing data, etc.; a magnetic contact switch for cutting off an input voltage from an access point where multiple photovoltaic solar cell module strings access in parallel and the multiple photovoltaic cell module strings; a magnetic switch driver for providing an operating voltage to the magnetic contact switch; an auxiliary control unit for interlinking a power drive circuit of the magnetic contact switch and a drive circuit by a data signal of a smart sensor unit to control the power interruption; an SMPS for supplying minimum power for the operation of the drive circuit; and a smart sensor unit including a temperature sensor, a flame sensor, a smoke sensor, an ultraviolet rays sensor, and an infrared rays sensor at a terminal part where the photovoltaic cell module strings are connected in parallel in the junction box. The auxiliary control unit senses a fire condition from the smart sensor unit, and the sensing result is transmitted to a central control unit so the external and internal power are cut off gradationally, thereby preventing fire spread.

Description

       TECHNICAL FIELD [0001] The present invention relates to a solar power generation system capable of preventing a fire from spreading by using a smart sensor,

       The present invention relates to a system for preventing fire and fire spread of a photovoltaic power generation system. More particularly, the present invention relates to a system and method for simplifying a detection sensor circuit in a connection box using a separate magnetic contact switch and a smart sensor unit, The present invention relates to a photovoltaic power generation system capable of preventing the spread of fire by using a smart sensor capable of maximizing the economic life span of a connection system of a photovoltaic system and protecting and safeguarding industrial safety and peripheral assets.

       The solar cell module, which is the most important part of the photovoltaic power generation system, is installed in a place where outdoor or sunshine right can be securely secured due to the nature of direct exposure to the sunlight, and it is installed at a remote location from a power plant, There is a difficulty in securing the technology and safety for prevention of fire and prevention of fire spread in the photovoltaic power generation facilities and its associated facilities.

       In order to solve such a problem, a variety of monitoring systems for solar power generation and systems for responding to problems have been developed, and Korean Patent No. 10-0697338 has proposed a remote monitoring apparatus and method of solar power generation utilizing the Internet .

       Korean Patent No. 10-0697338 collects real-time data from RTU which collects data of PV system in real time from inverter and real-time data from RTU installed in the whole country, and real-time operation data and operation through TCP / IP Monitoring status of PV system facilities received from web server and web server that monitors data and accesses database of DB server and DB server to connect to database and users want to inquire on the Internet, We have been able to inquire about the status of power generation at each site, control operator information by site, inquire solar power generation system diagram, view detailed information of solar power generation status, view graph of power generation status, , Substantially simply the state of the photovoltaic system Only presented boman, solar power plants and do not provide the skills and safety for fire prevention and fire prevention in expanding its ancillary equipment is a problem.

1. Patent patent application No. 10-1470348 (a photovoltaic power generation system having a fire prevention device) includes a temperature measurement unit having a plurality of temperature sensors for measuring temperature of a connection panel, A controller for generating a control signal relating to a closed circuit between the solar cell array and the inverter when at least one of voltage, current and temperature measured by the measuring unit exceeds a reference value, A switch for shutting off a closed circuit between the battery array and the inverter, and the like. 2. Patent Application No. 10-1679829 (photovoltaic power generation system) discloses an arc detection unit for detecting an arc signal in at least one of an inverter and a solar photovoltaic module. A leakage current detector for detecting a leakage current; A smoke generation detecting section for detecting smoke generation; A trip control unit for selectively blocking current flow between the solar array and the inverter; And a controller unit for operating the trip control unit according to a signal detected from the arc detection unit, the leakage current detection unit, and the smoke generation detection unit. 3. In Korean Patent Laid-Open No. 10-2016-0044410 (fire suppression method of a connection unit in a photovoltaic power generation system), a step of receiving a detection signal from a flame detection sensor; Performing a predetermined fire suppression according to the intensity of the detection signal, wherein the fire suppression step includes: a sub-step of transmitting the generation of sparks to the remote server while the control module performs continuous monitoring; A sub-step of operating the main breaker to turn off the main circuit breaker and informing the remote server of the occurrence of a fire; And a sub-step of the control module judging that a fire has occurred and waiting to receive a smoke detection signal from the year-end stop.

       It is an object of the present invention to provide a smart sensor for preventing a connection fire of a photovoltaic power generation system in advance by detecting and predicting a fire occurrence symptom by using a smart sensor unit, And to provide a photovoltaic power generation system capable of preventing a fire from spreading.

     In addition, the present invention can quickly and easily shut down the peripheral power circuit through a separate magnetic contact switch in the event of a fire in the connection panel of the solar power generation system, And to provide a photovoltaic power generation system capable of preventing the spread of fire by using a smart sensor capable of preventing economic, industrial, and personal damage from spreading.

       In addition, the present invention requires a large number of electric circuits by installing a plurality of detection sensors (flame detection sensors, etc.) for preventing fire, and each of these sensors is formed as one system and is commonly used as a line By using a smart sensor that can be connected in a simple manner to prevent fire or misconnection that can occur in a plurality of lines and to contribute to reduction of manufacturing cost by utilizing a plurality of electric circuit lines as a common line, And to provide a solar power generation system that can prevent solar radiation.

       In addition, the temperature sensor of the present invention can be installed in the inside of the backflow preventing diode and the connecting plate to prevent the fire due to the deterioration of the backflow preventing diode, And to provide a photovoltaic power generation system capable of preventing the spread of fire by using a smart sensor.

       In addition, the present invention is characterized in that the power circuit blocking function is performed in the auxiliary control unit, and when the auxiliary control unit abnormality occurs, the function is added to the central control unit of the monitoring system so that the function can be performed directly, In addition, it is possible to prevent a fire by providing a dual protection device so that the auxiliary control unit performs a central control unit function when the central control unit of the monitoring system abnormality occurs, And to provide a photovoltaic power generation system capable of preventing the spread of fire by using a sensor.

       In addition, according to the present invention, even if a solar power generation system is in normal operation or a fire occurs in a connection half, normal power is produced / supplied from the solar cell module on the primary side and high direct current power is connected. On the secondary side, Because the AC power is connected, it is impossible to shut off the electric circuit by the normal circuit breaker or relay. Therefore, the smart sensor that can prevent the fire by blocking the power circuit in a stepwise manner safely using the magnetic contact switch, Thereby providing a photovoltaic system.

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

       In order to accomplish the above object, the present invention provides a photovoltaic generation system capable of preventing the spread of fire by using a smart sensor, comprising: a plurality of solar cell modules that absorb solar energy and convert the solar energy into electric energy; An inverter for converting the direct current into AC, a connection panel for collecting DC power between the solar cell module and the inverter and monitoring the operation state of the solar power generation system, and data management; A connection point at which a plurality of solar cell module strings are connected in parallel, and a magnetic contact switch for blocking an input voltage at the plurality of solar cell module strings; A magnetic switch drive for providing an operating voltage to the magnetic contact switch; An auxiliary control unit for controlling the power cut-off by interconnecting the power drive circuit of the magnetic contact switch and the drive circuit based on the data signal of the smart sensor unit; An SMPS supplying at least power for operation of the drive circuit; A smart sensor unit having a temperature sensor, a flame sensor, a smoke sensor, an ultraviolet sensor, and an infrared sensor at a terminal portion of the solar cell module string connected in parallel; And the central control unit is notified of the occurrence of a fire in the smart sensor unit when the control unit detects the occurrence of a fire, so that the external power and the internal power are cut off step by step.

       The auxiliary control unit is associated with the smart sensor unit. When the data of the measured value sensed by each sensor of the smart sensor unit is input, the auxiliary control unit analyzes the data and notifies the central control unit of the monitoring system And the central control unit of the monitoring system determines whether or not the power circuit is shut off and issues an instruction to the auxiliary control unit so that the auxiliary control unit cuts off the relevant switch accordingly.

       In addition, the central control unit of the monitoring system receives the value detected by the control unit in the connection panel, makes it possible to monitor the display through the status panel at one time of day, And a function of controlling to cut off the power supplied to the current status display through the display unit.

       The auxiliary control unit monitors all data related to the external fire inputted through the smart sensor unit, shares the data information with the central control unit of the monitoring system, and normally stops the operation of the power plant according to the command of the central control unit Or to stop supplying power to the commercial power source finally.

       In addition, the central control unit of the monitoring system first disconnects the grid connection portion of the AC power source of the inverter output stage (Step 1) in order to safely shut off the large-capacity DC voltage and current drawn from the plurality of solar cell modules, The DC high-voltage circuit at the input of the inverter is cut off (step 2), the proper delay time is maintained (delay time) by the charge current of the line or the discharge time of the residual voltage after the two- (Step 3), and the current flowing from the conventional commercial power source is cut off by activating the phase-cutoff switch connected to the commercial power supply in the fourth step (step 4).

       According to the present invention, fire detection can be prevented beforehand in a connection panel of a photovoltaic power generation system by detecting and predicting a fire occurrence symptom by using a smart sensor unit.

       Further, the present invention can quickly and easily block the peripheral power circuit through a magnetic contact switch incorporated in a separate fire prevention system (a KIOSK external switch box), thereby preventing the fire from spreading to peripheral devices in the connection panel, , It is possible to prevent the spread of damage such as human life.

       In addition, the present invention requires a large number of electric circuits by installing a plurality of detection sensors (flame detection sensors, etc.) for preventing fire, and each of these sensors is formed as one system and is commonly used as a line It is possible to prevent fire or misconnection that can occur in a plurality of lines and to use the drive line as a common line.

       In addition, in the case of the temperature sensor of the present invention, it is possible to prevent the fire from expanding due to the prevention of fire due to the deterioration of the reverse-flow prevention diode, It is possible to prevent a fire due to a device inside the connection box or an ambient temperature rise by installing a detection sensor.

       Further, according to the present invention, the power circuit breaking operation is finally performed by the auxiliary control unit according to the occurrence of a fire, but the dual control unit is provided to directly perform the power circuit breaking operation in the central control unit when an abnormality occurs in the auxiliary control unit Thereby maximizing the effect of preventing fire.

       Further, even if the solar power generation system is in normal operation or in a fire in the connection half, normal power is produced / supplied from the solar cell module on the primary side and high DC power is connected to the primary side, Because the AC power is connected, the electric circuit can not be shut off by a normal circuit breaker or relay. Therefore, by using the magnetic contact switch, the power circuit is shut down safely step by step, thereby maximizing the effect of preventing the fire.

FIG. 1 is a schematic diagram showing an overall system for photovoltaic generation capable of preventing fire spread by using a smart sensor according to an embodiment of the present invention.
FIG. 2 is a view illustrating a configuration of a KIOSK external switch box of a photovoltaic power generation system capable of preventing fire spread by using a smart sensor according to an embodiment of the present invention. Referring to FIG.
3 is a block diagram of a smart sensor unit of a photovoltaic power generation system capable of preventing the spread of fire by using a smart sensor according to an embodiment of the present invention.

       While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

       Like reference numerals are used for like elements in describing each drawing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

       Hereinafter, a photovoltaic power generation system capable of preventing the spread of fire by using a smart sensor according to a preferred embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG.

       FIG. 1 shows a whole system for photovoltaic generation capable of preventing the spread of fire by using a smart sensor according to a preferred embodiment of the present invention. In the photovoltaic generation connection panel system according to the embodiment of the present invention, A controller 200, a smart sensor unit 210, an inverter 300, a monitoring system 400, a KIOSK external switch box 500, a connection terminal 510, a control unit 600, and the like can do.

       Generally, in a photovoltaic power generation facility, a solar photovoltaic module (100) is divided into solar cells, modules, and arrays that convert sunlight energy into electric energy in order to generate electricity using solar light.

       The connection unit 200 collects DC power between the solar cell module and the inverter and transfers the DC power to the inverter. The connection unit 200 prevents collision between the modules and prevents reverse current of power.

       The inverter 300 converts DC generated by the solar cell module 100 into AC and transmits the AC power to the power system. The inverter 300 generally includes a switchboard, and has an automatic operation stop function at sunrise and sunset, a maximum power follow- It is also possible to perform the MPPT control function.

       The monitoring system 400 monitors the power generation status in real-time to monitor and manage the power generation efficiency of the solar power generation facility, analyzes the cause of each day, monthly, yearly data recording and abnormality, To view the overall or local status of PV facilities.

       In the monitoring system 400, various information data of the solar radiation amount of the solar cell module, the surface temperature of the cell, the outside temperature, the weather, the humidity, the current value, the voltage value and the power value are received from the control unit 600, And the central control unit of the monitoring system 400 can perform overall control and command functions of the photovoltaic power generation facility through analysis of each kind of data.

       The KIOSK external switch box 500 includes a magnetic contact switch 520, a magnetic switch drive 530, an auxiliary control unit 540, an SMPS 550, and a connection terminal 510, I want to.

       The control unit 600 can detect or monitor the output current value of the solar cell module string, the output voltage value of the solar cell module, the solar radiation value, the solar cell module surface temperature value, the outdoor air temperature value, And the control unit 600 can perform a control function according to a central control unit command of the monitoring system 400. [

       2 is a block diagram of a KIOSK external switch box of a photovoltaic power generation system capable of preventing fire spread by using a smart sensor according to an embodiment of the present invention. The KIOSK external switch box 500 includes a magnetic contact switch 520, a magnetic switch drive 530, an auxiliary control unit 540, an SMPS 550, a connection terminal 510, and the like.

       The KIOSK external switch box 500 is provided on the outside of the connection panel so that even if a fire occurs in the connection panel, the KIOSK external switch box 500 can be installed at a safe distance (depending on circumstances, it can be installed on the side and periphery of the connection panel) The external switch box 500 may be provided at an intermediate portion where a string of the output terminal of the solar cell module is connected to a connection bar, thereby blocking current and voltage flowing through the string.

      The magnetic contact switch 520 performs a switching operation using an electromagnet and a relay. When the magnetic contact switch 520 can not normally be turned on by a switch or a relay in a line through which a large current flows, the capacity of the magnetic contact switch 520 When 12V or 220V is connected to a small switch and electricity is applied, it is possible to turn ON / OFF a load with a large current by operating a large capacity contact of the magnet.

       According to the contents of the Electricity Newspaper (2014.4.4), 363 cases (45%) of the electric facilities (803 cases) occurred in the distribution panel / switchboard including the connection box, Since it is not a safe zone from fire, countermeasures against fire prevention are necessary.

       The magnetic switch drive 530 is a device for supplying a DC voltage so that the magnetic contact switch 510 can operate.

       The auxiliary control unit 540 is a kind of CPU (Control Processing Unit), and is linked with the smart sensor unit 210 and the central control unit of the monitoring system through a drive circuit, so that various data are mutually shared, And controls the cut-off operation of the switch 510.

       The auxiliary control unit 540 is associated with the smart sensor unit 210. The auxiliary control unit 540 receives data on the measured values sensed by the respective sensors of the smart sensor unit 210, The central control unit of the monitoring system 400 notifies the central control unit of the monitoring system 400 whether or not to block the electric circuit in consideration of the analyzed data and the surrounding data, The auxiliary control unit 540 performs an operation of disconnecting the relevant switch according to the central control unit command of the monitoring system.

       The auxiliary control unit 540 monitors all the data related to the external fire inputted through the smart sensor unit 210 and shares the inputted data information with the central control unit of the monitoring system 400, A photovoltaic power generation system capable of preventing the spread of fire can be provided by using a smart sensor which further includes a feature of stopping the operation of the power plant normally according to the command or making it possible to finally stop supplying power to the commercial power source.

       Alternatively, when a fire occurs in the central control unit of the monitoring system 400 and the control of the central control unit is impossible, the auxiliary control unit 540 adds a function to be performed by the central control unit, It is possible to provide a photovoltaic power generation system capable of preventing the spread of fire by using a smart sensor, which further includes a feature that the power supply unit 540 alone can stop the power supply or shut down the power supply to the commercial power supply.

       For reference, the normal fire detector operating temperature is set to operate at 80 ° C to 120 ° C. The ignition temperature of wood / paper starts to ignite at 300 ° C to 500 ° C. The ignition temperature of PVC, etc., And the ignition temperature of butane gas is 405 DEG C, but the fire in the confined space occurs at a high temperature of 1,000 DEG C or higher in a short time due to simultaneous ignition of the surrounding materials and generation of flame.

       In a photovoltaic power generation facility, a backflow prevention diode is formed by connecting a plurality of strings in parallel, and a reverse current prevention diode is installed for each string. When one backflow prevention diode is broken, a large voltage difference with a normal string is generated, Temperature detec- tion and monitoring of the backflow prevention diode is important because it easily deteriorates and the reverse current flows, which causes a large damage to the entire solar cell module.

       Therefore, the temperature sensor is installed in the inside of the backflow preventing diode and the connecting board in order to prevent the fire from spreading due to the prevention of the fire due to the deterioration of the backflow prevention diode preferentially, and at the same time, It is possible to prevent the fire due to the ambient temperature rise inside the device or the junction box inside the junction box.

       For example, in view of the fact that the maximum operating temperature of the diode is 125 ° C., the backflow prevention diode is measured twice or more times per day at a detection temperature of 100 ° C. to 110 ° C., or the fire detector's nominal operating temperature is 80 ° C.- 120 ℃, if the detection temperature around the internal terminals of the connection panel is measured twice or more times per day from 80 ℃ ~ 100 ℃, it is determined that there is a fire, so that the preparation for breaking the electric circuit can be made.

       The data information, which can be determined as a fire occurrence symptom, includes a value of a current value, a voltage value, and a power value measured by the control unit 600, and determines a correlation with a sensed sensor value generated in the smart sensor unit 210 It is possible to compare the relationships and to detect and prevent signs of fire.

       For example, in the temperature sensor of the smart sensor unit 210, the temperature of the back-flow prevention diode of the string line is measured at 100 ° C to 110 ° C at least twice a day, If the current value, the voltage value, and the power value of the string line are suddenly increased or decreased from the reference average value while the detection temperature is measured twice or more times at 80 ° C to 100 ° C per day, It may mean blocking the power circuit as a quick check of the reverse-current prevention diode of the string line concerned and as a precaution against the fire.

       If one or more of the values detected in the lowest range among the ranges of the threshold values of the other sensors other than the temperature sensor and the temperature sensor appear overlapping, the auxiliary control unit 540 determines that the fire is a sign of occurrence, The central control unit of the system can be invited to interrupt the electric circuit.

      The SMPS 550 is a device for supplying voltage to the drive circuit between the KIOSK external switch box 500 and the smart sensor unit 210 by supplying at least electric power for operation of the drive circuit

      The connection terminal 510 is disposed inside the KIOSK external switch box 500 and connects to a circuit input or output through the KIOSK external switch box 500.

       FIG. 3 is a block diagram of a smart sensor unit of a photovoltaic power generation system capable of preventing fire spread by using a smart sensor according to an embodiment of the present invention. The smart sensor unit 210 includes a temperature sensor, It has a sensor, a smoke sensor, an ultraviolet sensor, an infrared sensor, a comparator, an AD converter, a decoder, a buffer and a regulator. Each sensor is commonly connected to a + wire, And is interrelated with the auxiliary control unit 540 and the central control unit of the monitoring system to share various data information.

       The temperature sensor of the smart sensor unit 210 detects the temperature of the terminal portion inside the connection half and the number of the reverse current prevention diodes 2 It is installed and detects two temperatures in parallel.

       The operation of the smart sensor unit 210 is performed by amplifying the analog signals of (1) to (4) and outputting a signal level through the A / D converter when one of the two signals is outputted through the comparator at a predetermined level, After coding the types of signals output by the sensors with a predetermined digital value, signals are transmitted to the auxiliary control unit 540 in the KIOSK external switch box 500 and the central control unit of the monitoring system via these buffers , And if necessary, the associated power circuit is blocked by the corresponding control system.

      The monitoring system 400 is provided with a central control unit for real-time monitoring of the power generation status, daily, monthly, yearly data recording and cause analysis in the event of occurrence of abnormality in order to support efficient operation monitoring and management of the solar power generation facility Control can be performed.

       The central control unit of the monitoring system 400 stores / manages all of the sensed sensor values input to the smart sensor unit 210, analysis values in the auxiliary control unit 540, data values in the control unit 600, And when an indication of the occurrence of a fire is detected, the auxiliary control unit 540 may block the related power circuit step by step to prevent the fire spread in advance.

       In addition, even when a fire has already occurred in a connection panel or the like, the present invention can quickly and easily block the related power circuits in a step-by-step manner so that the fire is no longer extended to the solar cell module 100 or peripheral facilities. It is possible to prevent expansion to nearby facilities.

       The reason why the central control unit of the monitoring system 400 sequentially disconnects the power circuit is that when the solar power generation system is normally operating or when a fire occurs in the connection panel, Since the high DC power is connected to the generator and the high AC power is connected from the KEPCO to the secondary side, it is not possible to shut off the electric circuit by the normal circuit breaker or the relay. Therefore, And to cut off the power circuit in a step-by-step manner safely using a magnetic contact switch.

       Accordingly, in order to safely shut off the large-capacity DC voltage and current drawn from a plurality of solar cell modules, the sequential power circuit breaking method firstly disconnects the grid connection portion of the AC power source of the inverter output stage (Step 1) The DC high-voltage circuit at the input of the inverter is cut off (step 2), the proper delay time is maintained (delay time) by the charge current of the line or the discharge time of the residual voltage after the two- (Step 3), the fourth phase is to shut off the phase-change shut-off device (the switch that cuts off the commercial power supplied to the office) to block the current flow to the existing phase phase (step 4) Can be prevented.

       In the case where a failure occurs in the auxiliary control unit 540 in the central control unit of the monitoring system 400 and the shutdown operation for the magnetic contact switch 520 can not be performed, The function of the direct monitoring system 400 can be performed by the central control unit of the direct monitoring system 400 to perform the dual control function.

       The central control unit of the monitoring system 400 receives the value detected by the control unit in the connection unit 200 and makes it possible to monitor the display through the status board at one time of day, The power of the power supply to the current state display can be cut off through the signal detected by the power supply unit.

       While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example, and it is to be understood that the invention is not limited to the disclosed embodiments. It will be readily apparent that such substitutions, modifications, and alterations are possible.

100: Solar cell module 200: Connection panel
300: Inverter 400: Monitoring system
500: KIOSK external switch box 600: Control unit
510: connection terminal 520: magnetic contact switch
530: Magnetic switch drive 540: Auxiliary control unit
550: SMPS

Claims (5)

A plurality of photovoltaic modules for absorbing solar energy and converting the photovoltaic energy into electric energy, an inverter for converting direct current to alternating current produced in the solar cell module, a connection panel for collecting the direct current power between the solar cell module and the inverter, A monitoring system for monitoring the operation state of the photovoltaic system and data management, a connection point where a plurality of solar cell module strings are connected in parallel, and a magnetic contact switch for blocking an input voltage at the plurality of solar cell module strings; An auxiliary control unit for controlling the power cutoff by connecting the power drive circuit of the magnetic contact switch and the drive circuit based on the data signal of the smart sensor unit to each other, At least the power supply for the operation of the drive circuit And,; the SMPS; and a connection half inside the solar cell module string, the temperature in the terminal area are connected in parallel sensors, flame sensors, smoke sensors, ultraviolet sensors, infrared sensors, etc. The smart sensor unit having
The central control unit of the monitoring system detects the occurrence of a fire in the smart sensor unit when it is detected by the control sub unit that the AC power source of the inverter output stage is used as a primary power source for safely shutting down the large- (Step 1), the DC high voltage circuit at the input terminal of the inverter is cut off (step 2), and the delay time is maintained with the charge current of the line or the residual voltage of the line after the step 2 cutoff Delay time), the magnetic contact switch of the input terminal of the string is cut off (step 3), and the current flowing from the conventional commercial power supply is cut off by activating the phase cutoff switch connected to the commercial power supply 4 A photovoltaic power generation system that can prevent the spread of fire by using smart sensors.
The method according to claim 1,
Wherein the auxiliary control unit is associated with a smart sensor unit and the auxiliary control unit analyzes the data and notifies the central control unit of the monitoring system when the data of the measured value sensed by each sensor of the smart sensor unit is input, Wherein the central control unit of the monitoring system determines whether or not to block the power circuit, and when the command is issued, the auxiliary control unit cuts off the relevant switch accordingly. .
The method according to claim 1,
The central control unit of the monitoring system receives the value detected by the control unit in the connection panel and makes it possible to monitor the display through the status board at one time of day, and after the sunset, And a control unit for controlling the power supply unit to shut off power supplied to the display unit.
The method according to claim 1,
The auxiliary control unit monitors all the data related to the external fire inputted through the smart sensor unit, shares the data with the central control unit of the monitoring system, stops the operation of the power plant normally according to the command of the central control unit , And finally, the power supply to commercial power can be stopped.
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