KR101913546B1 - Intelligent Solar Power System Utilizing Fire Prevention and Shutdown Function - Google Patents

Abstract

The present invention relates to an intelligent photovoltaic generation system utilizing a fire prevention and shutdown function to prevent fire on a connection board of the photovoltaic generation system by detecting and predicting symptoms of fire. The intelligent photovoltaic generation system includes: a solar module array for converting solar light energy into electrical energy; an inverter for converting a direct current produced in the solar module array into an alternating current and transferring the alternating current to a power system; a connection board for collecting DC power between the solar module array and the inverter transfer the collected DC power to the inverter; a control unit for outputting a control signal for shutting off a power circuit; and a monitoring system for displaying power generation status information, connection board status information, and environment information in real time to support the monitoring and management of operations of the photovoltaic generation system. Accordingly, when the solar module array circuit of any one group of the group-specific parallel circuits has a problem and is shut off, other healthy circuits are shut off at the same time through a KIOSK control unit, so that damages are prevented.

Description

FIELD OF THE INVENTION [0001] The present invention relates to an intelligent solar power system utilizing a fire prevention and shutdown function,

The present invention relates to a photovoltaic power generation system, in which a separate redundant reverse current prevention diode is installed to prevent a current flowing in a module string from flowing backward, and a smart sensor unit is used to connect a detection sensor circuit to a + , Simplifies to drive line and facilitates shutdown of power circuit in inverter and connection panel. It is possible to extend fire by using smart sensor unit which can maximize economic life span and protection of industrial safety and peripherals and assets for connection part of PV system. The present invention relates to an intelligent photovoltaic power generation system using a preventive fire prevention and shutdown function.

Conventional photovoltaic power generation systems include a plurality of solar cell modules that absorb solar energy and convert it into electric energy, an inverter that converts the direct current produced by the solar cell module into an AC power, an inverter that converts the direct current power between the solar cell module and the inverter, , A monitoring system for monitoring the operation state of the solar power generation system, data management, and the like, and a configuration of a monitoring system in which a plurality of solar cell module strings are connected in parallel to each other, A magnetic switch switch for providing an operating voltage to the magnetic contact switch and a drive circuit based on a data signal of the power drive circuit of the magnetic contact switch and the data signal of the smart sensor unit, And an auxiliary control unit A SMPS for supplying at least electric power for operation, and a temperature sensor, a flame sensor, a smoke sensor, an ultraviolet sensor, an infrared sensor, and the like are provided in a terminal portion where solar cell module strings are connected in parallel, The smart sensor unit is configured to notify the central control unit of the occurrence of a fire in the control auxiliary unit so as to step-out the external and internal power.

The monitoring system is equipped with a monitoring system. The monitoring system monitors the power generation status in real-time, daily, monthly, yearly data recording, cause analysis in case of abnormality in order to support efficient operation monitoring and management of the solar power generation facility. , And displays the overall or local status of the photovoltaic power generation facility in real time by displaying it as an indoor type plate.

In the monitoring system, various information data of the solar cell module solar radiation amount, cell surface temperature, outside temperature, weather, humidity, current value, voltage value and power value can be received from the control unit and stored or monitored. The central control unit can perform overall control and command functions for the operation of the photovoltaic power generation facility through analysis of each kind of data.

Solar module arrays, which are the most important part of the solar power generation system, are installed in a place where the direct sunlight exposure can be ensured and outdoor sunlight can be securely secured. 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 .

The preceding literature collects real-time data from RTU that collects data of PV system in real-time through serial communication from inverter and RTU installed in the whole country and stores real-time operation data and operation status through TCP / IP , A web server that accesses data base DB server and DB server database to service the data that the user wants to access on the Internet, inquires the status of the PV system facilities received from the web server, , Site information management, information on solar power generation system, information on photovoltaic power generation status, view of power generation status, inquiry of site installation information, and system status monitoring. However, in reality, It only provides status information of the photovoltaic system. , There is a problem in that it does not provide the technology and safety for prevention of fire and prevention of spread of fire in the photovoltaic power generation facility and its attached facilities.

1. A photovoltaic power generation system having a fire prevention device according to Japanese Patent No. 10-1470348 includes a temperature measurement unit having a plurality of temperature sensors for measuring the temperature of a connection panel, A control device 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 through the solar cell module exceeds a reference value, A switch for shutting off a closed circuit between the array and the inverter, and the like. 2. A solar photovoltaic system according to claim 1, wherein at least one of the inverter and the photovoltaic connection module has an arc detection unit for detecting an arc signal; 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. A method of fire suppression of an access unit in a solar power generation system, comprising: 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.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a fire prevention and shutdown function that can prevent a connection fire in a photovoltaic power generation system The goal is to provide an intelligent PV system.

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, The object of the present invention is to provide an intelligent photovoltaic power generation system using a smart sensor to prevent the spread of damages such as economic, industrial, and human life using fire prevention and shutdown function.

Further, in the present invention, a temperature sensor is provided in the smart sensor unit in multiple in the backflow prevention diode, the terminal circuit connection portion in the connection half, and the connection half to deteriorate the backflow prevention diode, deteriorate the terminal circuit connection portion in the connection half, And an object of the present invention is to provide an intelligent photovoltaic power generation system utilizing a smart sensor unit to prevent and prevent a fire caused by deterioration due to an ambient temperature rise.

In addition, the present invention is based on the provision of a redundant reverse current prevention diode in the KIOSK to prevent a short circuit current between a solar cell module or a string due to a line short circuit caused by an unexpected cause such as aging of a line connected to a solar module array, natural environment, dust, The object of the present invention is to prevent the loss and damage of the solar cell module due to overcurrent, overvoltage and unbalanced load.

In addition, in the present invention, a plurality of solar module array output circuits in the KIOSK and the connection module are divided into groups and configured in parallel to constitute a cut-off circuit. If a trouble occurs in any one of the solar module array circuits, And other healthy circuits at the same time, to prevent and minimize the associated damage

The problems to be solved by the present invention are not limited to the above-mentioned problems. Other technical subjects not mentioned will be apparent to those skilled in the art from the following description.

A solar photovoltaic power generation system according to the present invention comprises a solar module array for converting sunlight energy into solar energy, an inverter for converting a direct current produced in the solar module array into an AC power and transmitting it to a power system, And a switch for shutting off the cathode-side line of the solar module array, and a control circuit for interrupting the power circuit based on power generation status information, connection status information, and environmental information And a monitoring system for displaying power generation status information, connection status information, and environment information in real time in order to support operation monitoring and management of the solar power generation system. The KIOSK is connected to the solar module array line If a reverse current flows due to an accident, control the backflow prevention part and the magnetic contact switch to prevent reverse current And a KIOSK control unit, wherein the power circuit interrupting includes interrupting an output side and an input side circuit of the inverter, a cathode side circuit interception of the solar module array, and a commercial power supply side circuit interrupting, (DD, DD1, DD2) are provided between the cathode side and the connection terminal CC of the diode D and the connection terminal CC so that the reverse current flows even if a short circuit occurs at some point of either one string or at some point of the other string Wherein the connection circuit includes a smart sensor unit and the power circuit breaker is connected to a group of solar module array circuits in a groupwise parallel circuit via a KIOSK control unit If there is a problem, it blocks other healthy circuits at the same time and prevents the damage. Made of intelligent solar power system utilizing the fire protection and prevention, it characterized in that the box.

In addition, the power generation status information according to the present invention is at least one of a current value, a voltage value, and a power value, and the connection condition information includes at least one of a backflow prevention diode of the smart sensor unit, a PV terminal block, Wherein the environmental information is at least one of a solar radiation amount, an outside temperature, a weather, a humidity, and a surface temperature of a solar module module where the solar module array is installed. It is made up of an intelligent solar power generation system.

The power circuit cutoff according to the present invention is characterized in that the power circuit is cut off by assigning priority to the output side and input side circuit cutoff of the solar module array, the anode side circuit cutoff of the solar module array, and the commercial power supply side circuit cutoff And an intelligent photovoltaic power generation system utilizing fire prevention and shutdown function.

In addition, the monitoring system according to the present invention includes a mobile notification module, which is connected to a smart sensor unit in the connection module, and is connected to a backflow prevention diode, a PV terminal block, a temperature sensor installed inside the connection panel, A warning message is notified to a mobile popup window and a measurement value and a measurement position are displayed in a text message to display a measurement value and a position And an intelligent photovoltaic power generation system utilizing a fire prevention and shutdown function.

In addition, the monitoring system according to the present invention includes a mobile notification module, which is connected to the smart sensor unit in the connection module and is connected to a backflow prevention diode, a PV terminal block, a temperature sensor installed inside the connection panel, When the detection sensor installed on at least one of the smoke detection sensors is activated and the breaker is cut off, the cutoff warning message is notified to the mobile popup window and the cutoff circuit and the cutoff position are displayed in a text message And an intelligent photovoltaic power generation system utilizing the fire prevention and shutdown function.

Further, the backflow prevention unit according to the present invention is characterized by comprising a redundant reverse current prevention diode (DD) connected to the cathode side of the strings constituting the solar cell array and a connection terminal (CC) connected to the redundant reverse current prevention diode And intelligent photovoltaic power generation system utilizing fire prevention and shutdown function.

Further, in the power circuit cut-off according to the present invention, when the output circuit of a plurality of solar module arrays is divided into groups and connected in parallel through the KIOSK control unit, when a trouble occurs in any one of the solar module array circuits, And an intelligent photovoltaic power generation system that utilizes fire prevention and shutdown functions, including the ability to block other healthy circuits at the same time to prevent damage.

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 cut off the peripheral power circuit through the magnetic contact switch incorporated in the KIOSK when the connection of the solar power generation system occurs, thereby preventing the fire from spreading to the peripheral devices in the connection panel, , It is possible to prevent the spread of damage such as human life.

Further, in the present invention, a temperature sensor is provided in the smart sensor unit in multiple in the backflow prevention diode, the terminal circuit connection portion in the connection half, and the connection half to deteriorate the backflow prevention diode, deteriorate the terminal circuit connection portion in the connection half, It is possible to simultaneously prevent the fire caused by the deterioration due to the rise in the ambient temperature and to prevent the fire from spreading by using the smart sensor unit.

In addition, the present invention provides a redundant reverse current prevention diode in the KIOSK, and a short circuit current flows between the solar cell modules due to a line short circuit caused by an unexpected cause such as line aging of the solar cell module or string, natural environment, dust, It is possible to prevent the loss of the solar cell module due to the overcurrent, the overvoltage and the unbalanced load and the increase of the fire.

In addition, when an abnormal symptom or a fire occurs in the connection counterboard backflow prevention diode, the PV terminal block, the temperature sensor installed inside the connection panel, or the flame or the smoke sensor through the mobile notification module, Or the measurement value of the fire point and the measurement position are indicated by a text message to prevent the fire from spreading in advance and the loss and fire of the solar cell module which can quickly deal with the initial response due to the fire symptom or occurrence It is possible to prevent the occurrence of the problem.

In addition, the present invention includes a mobile notification module, and when an abnormal symptom or a fire occurs in the connection backflow prevention diode, the PV terminal, the temperature sensor installed inside the connection panel, or the flame or the smoke sensor, The warning message and the position of the breaker are displayed in a text message to prevent the spread of the fire and to prevent the expansion of the loss and fire of the solar cell module capable of promptly handling the initial response in the future based on the operation of the breaker It is effective.

In the present invention, a plurality of solar module array 100 output stages in the KIOSK 200 and the connection module 300 are divided into groups and configured in parallel, If there is a problem in the circuit, the other circuit is cut off at the same time as the problematic circuit is cut off, and the related damage is originally prevented and minimized.

1 shows a solar power generation system according to a preferred embodiment of the present invention.
2 is a block diagram of the KIOSK of the solar power generation system according to the present invention.
Figure 3 shows the connection of a solar module array, a KIOSK backflow prevention part, and a connection module according to the present invention.
Figure 4 shows the current flow in accordance with the shorting of either line on the anode side in the strings of the solar module array.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. For convenience of explanation, elements shown in the drawings may be exaggerated, omitted, or schematically represented.

Hereinafter, a solar power generation system according to a preferred embodiment of the present invention will be described.

1 shows a solar power generation system according to a preferred embodiment of the present invention.

A solar power generation system according to an embodiment of the present invention includes a solar module array 100, a KIOSK 200, a connection unit 300, an inverter 400, a control unit 500, and a monitoring system 600 .

The solar module array 100 converts the solar light energy into electrical energy. As an embodiment, the solar module array 100 is composed of a plurality of strings, and one string is formed by connecting a plurality of solar modules SCM in series.

The KIOSK 200 includes a backflow prevention unit 210, a magnetic contact switch 220 and a KIOSK control unit 230. The KIOSK 200 includes an external switch box installed separately from the connection unit 300, When the connection unit 300 and the control unit 500 are in a state of being out of control when a fire occurs or an emergency state can not be interrupted and the KIOSK 200 system is activated and the switch is turned off, The detailed function and the driving will be described later in the description of FIG.

The connection unit 300 collects the DC power produced from the solar module array 100 and transmits the collected DC power to the inverter 400. The connection block 300 prevents collision between the strings of the solar module array 100 and prevents reverse current flow. The connection unit 300 is provided with a smart sensor unit 310 for detecting environmental information and power generation status information inside the connection unit 300.

Also, the connection unit 300 may be provided with a reverse current prevention unit, a reverse voltage prevention unit, a current measurement unit, a voltage measurement unit, a power measurement unit, and a temperature measurement unit, It is also possible to install a temperature sensor in each part to measure the internal temperature, reverse voltage prevention part temperature, reverse current prevention part temperature, current measurement part temperature and PCB temperature.

In the case of the KIOSK 200 and the connection module 300, a plurality of output modules of the solar module array 100 are divided into groups, and the isolation circuits are formed in parallel. In case of a problem, even though the problematic circuit should be cut off and the other good circuit should not cause a problem, there is a possibility that the damage is enlarged to a large extent due to a trouble in other sound circuit due to unexpected phenomenon. If one of the circuits in which a problem occurs is interrupted for the sake of original prevention, the other harmful circuits are simultaneously cut off, thereby preventing the related damage from being minimized.

The smart sensor unit 310 may include at least one of a temperature sensor, a flame sensor, a smoke sensor, an ultraviolet sensor, and an infrared sensor. The smart sensor unit 310 may also detect a change in a current value, a voltage value, Such as an ammeter, a voltmeter, or the like. The sensing signal output from the smart sensor unit 310 is transmitted to the control unit 500. In this case, when the sensing signal is out of the preset allowable value, the control unit 500 outputs a control signal for interrupting the circuit in the system Output.

Referring to FIG. 1, backflow prevention diodes D1, D2, and D3 are provided in the connection block 300. FIG. In the photovoltaic power generation system, the backflow prevention diodes D1, D2, and D3 are provided for each string. If the backflow prevention diodes D1, D2, and D3 connected to one terminal of one string are broken, So that the remaining reverse-flow preventing diodes D1, D2 and D3 are easily deteriorated and a reverse current flows. Since this reverse current causes a large damage to the entire solar cell module, the temperature sensing of the backflow prevention diodes (D1, D2, D3) is more important than anything else.

     For reference, the normal fire detector operating temperature is designed to operate at 80 ° C to 120 ° C. The ignition temperature of wood, paper, etc. begins to ignite at 300 ° C to 500 ° C. The ignition temperature of PVC ignites at 455 ° C And the ignition temperature of butane gas and the like can be ignited at 405 ° C. In a closed space, fire occurs at the same time because the surrounding material is ignited and flame is generated.

The temperature of the backflow prevention diode is measured in the range of 100 ° C to 110 ° C or the temperature of the connection terminal inside the connection panel 300 is in the range of 80 ° C to 100 ° C Or the ambient temperature inside the connection panel 300 is measured in the range of 80 DEG C to 100 DEG C and the predetermined allowable range in relation to the smoke and flame means a general nominal operating tolerance value of the smoke and flame sensor .

The inverter 400 converts the direct current produced by the solar module array 100 into alternating current and transmits it to the power system.

Also, the control unit 500 can use the power generation state detection values such as the current, voltage, and power detected as the detection of the abnormal symptom. It is possible to judge the occurrence of fire by analyzing the change of measured current value, voltage value and power value.

The control unit 500 is installed inside the backflow prevention diodes D1, D2 and D3, the PV terminal block and the connection board 300 in the temperature sensor of the smart sensor unit 310, And transmits the measured values to the monitoring system 600 when the measured values are out of a predetermined allowable range, and when the measured values are measured by the respective sensors If it is determined that there is an abnormality in the occurrence of fire by comparing the correlation with the detected value of the power generation state such as current, voltage, electric power, etc. outside the predetermined allowable range, the breaker is sequentially blocked through the control command for the breaker operation. The facts are transmitted to the monitoring system 600 so that relevant countermeasures can be taken.

The control unit 500 may be configured such that in a group-by-group parallel disconnect circuit configuration of a plurality of output modules of the solar module array 100 installed in the connection module 300, a group of the solar module array 100 circuits Even though the problematic circuit should be cut off and the other circuit should not cause a problem, there is a case that the problem is caused to other sound circuit due to unexpected phenomenon and the damage is enlarged to a large scale. If any one of the circuits is interrupted, the other circuit is shut down at the same time to prevent economic, material and personal damage from being minimized.

Here, for example, in the temperature sensor of the smart sensor unit 310, the temperature of the backflow prevention diodes D1, D2, and D3 of the string is measured at 100 ° C to 110 ° C twice or more per day, Or the temperature of the terminal circuit connection portion inside the connection panel 300 is measured twice or more at 80 ° C to 100 ° C per day or the detection temperature around the internal terminals of the connection panel 300 is measured at 80 ° C to 100 ° C per day Or the number of times the current, voltage, or power of the string suddenly increases or decreases from the reference average value is measured twice or more per day, or in the case of the smoke and flame sensor, the value exceeds the nominal allowable value range (D1, D2, D3) of the corresponding string through the correlation, and a case in which one or more of the six variable factors simultaneously change, ), Inside the connection panel 300 The connection terminal state, the internal environment state of the connection panel 300, and the state of the line that is opened in the connection panel 300 can be checked and confirmed in advance, so that it is possible to perform a preliminary determination of a fire and proactive measures accordingly.

The control unit 500 may include a voltage meter and an ammeter installed in the connection unit 300, a sensor installed in the smart sensor unit 310, power generation status information detected from sensors installed in the solar power generation facility, And outputs a control signal for interrupting the power circuit therefrom. It also outputs power generation status information, connection status information, and environmental information to the monitoring system.

The control unit 500 according to the present invention controls a control signal for a closed circuit between the solar module array 100 and the inverter 400 when at least one of the measured voltage, current, and temperature exceeds a predetermined allowable value And the switch between the solar module array 100 and the inverter 400 is driven in accordance with the control signal to shut off the closed circuit. The comparative analysis results show that any one or more of the six variable factors It is possible to block the related circuit breaker even when the circuit breaker changes at the same time, and it is also possible to use the two circuit breakers by selecting or merging them.

The switches provided on the anode side and the cathode side of the solar module array 100 can be shut off according to the control signal of the control unit 500 according to the present invention. It is preferable that only the switch provided on the cathode side of the solar module array 100 is cut off according to the control signal of the control unit 500. [ And it is also possible to cut off the switch provided on the input side or the output side of the inverter 400. [

3, the switch installed on the KIOSK 200 may be cut off to block the cathode side of the solar module array 100, and preferably, the anode side of the solar module array 100 may be blocked And the switches provided on the cathode side and the cathode side are cut off. In addition, it is possible to configure the solar module array 100 to block the commercial power supplied to the photovoltaic system related office using the magnetic contact switch 220 installed in the KIOSK 200 when a fire occurs in the connection module 300, The input side and the output side of the inverter 400, and the commercial power supply side of the inverter 400. In this way, the expansion of the fire can be prevented. The switch may be a magnetic contact switch 220.

The priority order is such that the output voltage of the inverter 400, the input of the inverter 400, the anode of the solar module array 100, It is preferable to set the power circuit to be cut off in priority order of commercial power.

1, 1, 2, and 3 are sensors for detecting environmental information. In FIG. 1, reference numeral 1 denotes an inclined surface irradiation sensor at the place where the system is installed, 2 denotes a solar cell surface temperature sensor, and 3 denotes an ambient temperature sensor.

The monitoring system 600 displays power generation status information, connection status information, and environment information in real time for efficient operation monitoring and management of the photovoltaic power generation system. The monitoring system includes power generation status information such as a current value, a voltage value, a power value and the like as well as the ambient temperature of the elements installed inside the connection board 300, particularly the check valves (D1, D2, D3) Temperature and the like of the connection module 300 and environment information such as the solar radiation amount, the outside temperature, the weather, the humidity, the surface temperature of the solar cell module, and the like at the place where the solar module array 100 is installed, Store and display it.

   The monitoring system 600 may further include a mobile notification module and may be connected to the backflow prevention diodes D1, D2 and D3, the PV terminal block and the connection module (not shown) through the smart sensor unit 310 installed in the connection module 100 The control unit 500 transmits the measured values of the temperature sensor provided in the inside of the connection unit 300 and the detection sensor for detecting the smoke and the flame installed in the connection unit 300 to the control unit 500, If a measurement value of at least one of the detection sensors is detected in a predetermined tolerance range or more, the measurement value is transmitted to the monitoring system 600 so that the manager can manage the measurement value. A warning message is also displayed on the mobile pop- At the same time as the notification, the measured value and the measured position are displayed in a text message so that the position of the breaker can be known, thereby promptly performing efficient management and countermeasures This is possible

The monitoring system 600 may further include a mobile notification module and the backflow prevention diodes D1, D2, and D3, the PV terminal block, and the connection module (not shown) through the smart sensor unit 310 installed in the connection unit 300 The control unit 500 transmits the measured values of the temperature sensor provided in the control unit 300 and the detection sensor for detecting the smoke and the flame installed in the connection unit 300 to the control unit 500, When the detection sensor installed in at least one of the sensors detects a measurement value exceeding a predetermined allowable range and the breaker is interrupted, the interception warning message is informed to the mobile popup window and the interrupter position is indicated by a text message It is possible to make effective management and response measures possible.

FIG. 2 is a configuration diagram of a KIOSK of a solar power generation system according to the present invention, and FIG. 3 shows a connection of a solar module array, a KIOSK backflow prevention part, and a connection module according to the present invention.

The KIOSK 200 blocks the anode side and cathode side lines of the solar module array 100. In one embodiment, it is possible to block only the cathode-side line. Also, the KIOSK 200 prevents burn-out of the solar cell module due to a short-circuit between the strings of the solar module array 100.

To this end, the KIOSK 200 according to the present invention includes a back-flow prevention unit 210, a magnetic contact switch 220, a KIOSK control unit 230, a switch driver for supplying driving power to the magnetic contact switch 220, ) Internal configuration and associated systems needed to operate the circuit.

The KIOSK 200 is installed between the solar module array 100 and the connection module 300. The KIOSK 200 is installed at a distance from the connection panel 300 so as to safely protect the connection panel 300 even if a fire occurs. For example, it can be installed on the connection half-side and the periphery.

The backflow prevention unit 210 in the KIOSK 200 is connected to the cathode side terminal of the solar module array 100, that is, the cathode side terminals of each string. Although three strings are shown in FIG. 3, more strings can be installed. The strings all have the same number of solar cell modules connected in series.

The backflow prevention unit 210 included in the KIOSK 200 according to the present invention includes redundant reverse current prevention diodes DD, DD1 and DD2 connected to the respective strings and a connection terminal CC. Preferably, the cathode (cathode) of at least one of the redundant reverse current prevention diodes DD, DD1 and DD2 is connected to the negative terminal of the string and connected to the anode of one or more redundant reverse current prevention diodes DD, DD1 and DD2 Is electrically connected to one connection terminal CC.

The connection terminal CC of the backflow prevention part 210 is connected to the magnetic contact switch 220. The magnetic contact switch 220 is used as a switch to block a large-capacity line at a low voltage by using electromagnets and relays. When the magnetic contact switch 220 can not be turned ON or OFF by a normal switch or a relay in a line through which a large current flows, 12 V or 220 V is connected to a switch having a small capacity through a magnetic contact switch 220, It is possible to easily turn ON / OFF the load through which the large current flows, and the magnetic contact switch 220 is interconnected with the KIOSK control unit 230. [

The KIOSK control unit 230 includes a switch driver for controlling the operation of the magnetic contact switch 220 and supplying driving power to the magnetic contact switch 220 and a cutoff switch for each string. However, the switch may be constituted by one switch by configuring a common terminal for a plurality of string-by-string break switches.

The KIOSK control unit 230 also serves to prevent the photovoltaic module from being damaged due to a short circuit on some string lines by using the redundant reverse current prevention diodes DD, DD1 and DD2 of the backflow prevention unit 210 In case a fire occurs in the connection panel 300 and the shutoff system of each circuit is not operated or the shutoff system of each circuit is not operated due to an abnormality of the control unit 500 or a fire, Unit 310 and the control unit 500 so as to be operable to control the functions and roles of the smart sensor unit 310 and the control unit 500 in case of need, The control and the magnetic contact switch 220 are operated to analyze the same data as that of the smart sensor unit 310 and the control unit 500, It can be controlled to perform a single command.

The KIOSK control unit 230 may be configured such that in the configuration of the parallel cut-off circuit for each group of the output terminal circuits of the plurality of solar module arrays 100 installed in the KIOSK 200, In order to prevent the problem from occurring due to an unexpected phenomenon and to cause other problems to occur due to unexpected phenomena, it is necessary to use a circuit in which a problem occurs If blocked, other healthy circuits may also be blocked at the same time to minimize the damage.

Hereinafter, the function of the redundant reverse current prevention diode provided in the backflow prevention portion of the present invention will be described.

4 shows the flow of current according to a short circuit of any two of the strings of the solar module array.

In the circuit shown in Fig. 4 (A), only the connection terminals are provided and redundant reverse current prevention diodes DD, DD1 and DD2 are not provided. In such a circuit, two strings constitute the normal power generation and operation However, when any one of the string circuits is short-circuited to constitute a closed circuit, the solar cell module can not produce normal power and the solar cell module may be damaged due to the overcurrent and overvoltage due to the short circuit current. In particular, In the case of the battery module, the resistance and the load applied to each module are not uniform, and the overcurrent and the overvoltage applied to each solar cell module also appear differently, resulting in a greater loss.

If there is a small number of solar cell modules connected to the A string and there is a large number of solar cell modules connected to the B string, if a short circuit occurs between the A point of the A string and the B point of the B string, A short-circuit current flows, so that the B string generates more voltage and power than the A string, and either one of the solar cell modules may be burned out.

However, when the redundant reverse current prevention diodes DD, DD1 and DD2 are provided between the cathode side of the string and the connection terminal CC as shown in Fig. 4 (B), the potentials of the redundant reverse current prevention diodes DD, DD1 and DD2 The cathode is connected to the negative pole side of the string and the anode of the redundant reverse current prevention diodes DD, DD1 and DD2 is connected to the connection terminal CC so that a short circuit occurs at point A of the A string and point B of the B string It is possible to prevent the formation of a closed circuit between the strings by preventing the reverse current from flowing due to the redundant reverse current prevention diodes (DD, DD1, DD2), so that the solar cell module may be burned or fired due to short- .

The redundant reverse current prevention diodes DD, DD1 and DD2 provided in the backflow prevention part 210 of the KIOSK 200 according to the present invention prevent the closed circuit from being formed at the connection terminal CC and prevent the formation of a closed circuit in the natural environment, The solar cell module can be prevented from being burned or fired due to an unexpected short circuit of the line.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the present invention is not limited to the disclosed exemplary embodiments, but various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention.

100: solar module array
200: KIOSK (external switch)
210:
220: Magnetic contact switch
230: KIOSK control unit
300: Connection board
310: Smart sensor unit
400: Inverter
500: Control unit
600: Monitoring system
CC: Connection terminal
D1, D2, D3: Backflow prevention diode
DD, DD1, DD2: Redundant reverse current prevention diode
SCM: Solar module

Claims (7)

A solar module array for converting solar light energy into electrical energy,
An inverter for converting a direct current produced in the solar module array into an alternating current and transmitting it to a power system,
A connection module for collecting DC power between the solar module array and the inverter and transferring the DC power to the inverter,
A control unit for outputting a control signal for interrupting a power circuit based on KIOSK including a switch for shutting off the cathode side line of the solar module array, power generation status information, connection status information and environment information,
And a monitoring system for displaying power generation status information, connection status information, and environment information in real time for operation monitoring and management support of the photovoltaic power generation system,
The KIOSK includes a reverse current blocking unit for preventing reverse current and a KIOSK control unit for controlling the magnetic contact switch when a reverse current due to an accident occurs in the solar module array line,
The power circuit interception includes interrupting the output side and input side circuit of the inverter, interrupting the cathode side circuit of the solar module array, and interrupting the commercial power supply side circuit
The backflow prevention part is provided with a redundant reverse current prevention diode (DD, DD1, DD2) between the cathode side of the string constituting the solar module array and the connection terminal (CC), and a part of one string And blocking the flow of reverse current to prevent the strings from becoming closed circuits even if a short circuit occurs at the point, wherein the connection module includes a smart sensor unit,
The power circuit cut-off includes a function of preventing damage to the other solar modules at the same time when a trouble occurs in a group of solar module array circuits in the group-specific parallel circuit through the KIOSK control unit, Intelligent photovoltaic power generation system utilizing fire prevention and blocking function.
The method according to claim 1,
Wherein the power generation status information is at least one of a current value, a voltage value, and a power value, and the connection condition information includes at least one of a backflow prevention diode of the smart sensor unit, a PV terminal block, a temperature sensor installed inside the connection panel, Wherein the environment information is at least one of a solar radiation amount, an outside temperature, a weather, a humidity, and a surface temperature of the solar cell module at a place where the solar module array is installed. Power generation system.
The method according to claim 1,
Characterized in that the power circuit breaker is provided with a priority for blocking the output side and the input side circuit of the inverter of the solar module array, blocking the anode side circuit of the solar module array, and blocking the commercial power supply side circuit, Intelligent photovoltaic system utilizing blocking function.
The method according to claim 1,
Wherein the monitoring system comprises a mobile notification module, wherein the mobile notification module is connected to a smart sensor unit in the connection module, and is connected to a backflow prevention diode, a PV terminal block, a temperature sensor installed inside the connection panel, If at least one of the detection sensors installed in any one of the sensors detects a measurement value exceeding a predetermined allowable range, a warning message is notified to the mobile popup window and the measurement value and the measurement position are displayed in a text message Wherein the fire prevention and shut-off function is used for the solar power generation system.
The method according to claim 1,
Wherein the monitoring system comprises a mobile notification module, wherein the mobile notification module is connected to a smart sensor unit in the access panel to detect a backflow prevention diode, a PV terminal block, a temperature sensor installed inside the connection panel, or a flame or smoke sensor Wherein when a breaker is cut off by operating at least one of the detection sensors, the breaker warning message is notified to the mobile popup window and the breaker position is displayed in a text message so that the breaker position can be known. And intelligent photovoltaic system utilizing blocking function. delete delete

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