KR101787528B1 - Electrical Fire Prevention System of Photovoltaic Power System - Google Patents

Abstract

The present invention relates to an electric fire prevention system for a solar power generation facility, comprising: a unit solar light string including at least one solar panel; a connection panel for collecting solar photovoltaic power of the unit solar light string; And an inverter for converting the power of the photovoltaic power generation device into a commercial power, wherein the connection panel includes a voltage and current detection function, a reverse current prevention function, and a circuit protection function for the photovoltaic power generation At least one connecting electronic circuit board for measuring an amount of power generated by the unit solar string and determining whether the unit solar string is normal or not; A breaker for connecting the photovoltaic power to the inverter; A connection electronic circuit board and a plurality of connection terminals each of which is connected between the connection electronic circuit board and the circuit breaker; At least one connection failure detection sensor for detecting heat generated at the connection terminal; And at least one connection failure indicator for integrally managing the detection results of the plurality of connection failure detection sensors and indicating a detection state of connection failure of the connection terminals. Therefore, the present invention can prevent the occurrence of an arc or prevent an arc from occurring by forming a cut-out portion in the connecting electronic circuit board or securing a separation distance between the (+) and (- It is possible to prevent the occurrence of fire due to the connection failure, and it is possible to detect the connection failure at all the connection terminals through the connection failure detection sensor, which is a thermal sensitive element, so that the connection fire prevention can be prevented in advance, Loss, loss of life, and spread of the burden.

Description

{Electrical Fire Prevention System of Photovoltaic Power System}

The present invention relates to an electric fire prevention system for a photovoltaic power generation facility, and more particularly, to an electric fire prevention system for a photovoltaic power generation facility that detects a connection failure in a connection terminal in a connection electronic circuit board installed inside a connection board in real time, The present invention relates to an electric fire prevention system for a photovoltaic power generation facility capable of preventing an electric fire in advance.

Photovoltaic power generation uses solar photovoltaic energy, which is an unlimited supply of energy, and it does not generate vibration and noise because it does not require mechanical moving parts. It is possible to select from small power generation facilities to large power generation facilities It has advantages.

However, the solar power generation system has a possibility of fire due to the use of a current source among the direct current power sources. In recent years, the solar power generation system is explosively increasing, so that the possibility of fire is expected to be higher.

On the other hand, when analyzing the fire in the photovoltaic power system, the DC section and the DC section are mostly used. In the domestic case, the official section of the fire department has 48.2% Of the total population. However, in addition to fire counts at the fire department, it is considered to be 10 times larger than the statistical figures in the official data if the connection panel itself is lost. As the installation site increases sharply, more fire damage is expected.

The photovoltaic power generation system is based on a solar cell that converts the light energy transferred from the sunlight into electric energy. The unit solar cell has a small amount of energy to generate, so it is connected in parallel- And then serially connected in parallel to generate a galvanic current having a high voltage and current. In this case, the photovoltaic power generation system uses a connection module for collecting the output cable of the photovoltaic module, that is, a string cable in one place, and converts the summed high DC electricity from the connection module into AC power through the inverter, Link to the system.

In the photovoltaic power generation system, the connection panel requires that individual strings be connected in parallel in order to collect several pieces of photovoltaic electrical energy, which are made up of several solar modules connected in series. In order to prevent the electricity generated from one string cable from circulating through another string cable A diode for preventing reverse current must be added.

Typically, the power generated by one solar string is about 2. KW, and for a 100 KW power plant, 40 solar strings need to be connected in parallel. In this way, a plurality of electrical contacts are included in the connection board, a reverse current prevention diode must be used, and various electronic circuits for measuring voltage and current are installed for recent monitoring and control.

As described above, the photovoltaic power generation system can cause a fire due to an electrical contact failure or a diode overheating on a connection board where electrical wiring is gathered in one place. In a high humidity environment such as rainfall or coastal seawater, The conductive path is formed at the point where the distance between the gaps is the shortest among the substrates in the connection board, and an arc is generated, so that there is a great possibility of fire.

In particular, photovoltaic electricity operates as a DC current source, which has different characteristics than a commercial AC power source. In other words, the AC power is an alternating current in which the electricity supplied from the power plant is periodically changed in size and direction, while the DC power continues to flow. Therefore, when there is a problem in the DC power supply, the current is continuously supplied.

As a technology to prevent fire in PV system, there is a technology to prevent fire spread by operating an automatic fire extinguishing system when a smoke detector is installed inside a connection board. It detects flame, arc or gas, And the like.

Techniques for preventing or suppressing a fire by detecting an existing arc or fire are to operate a breaker or fire extinguishers when a fire occurs, but since the solar string continuously supplies generated power It is practically difficult to suppress the fire, and there is a fear that the electrical characteristics of the connection module in which high voltage / high current flows may cause personal injury.

On the other hand, as another technique for preventing fire in the photovoltaic power generation system, when a surveillance camera is installed inside the connection panel, it is possible to constantly monitor the contact failure and the arc. In this case, although the general camera can be used for the arc or fire monitoring inside the connection panel, the infrared camera is required to detect the heat generation due to the poor contact, so that the installation cost is too high.

On the other hand, the temperature can be measured by attaching a temperature IC sensor capable of directly measuring the heat to the rear surface or the periphery of the connection terminal. However, since a plurality of expensive sensors are required, the cost is inferior in terms of cost, It is not practicable that a cable for connecting each sensor, that is, a communication cable, must be increased.

Korean Patent No. 1533439 entitled "Photovoltaic Module with Electric Fire Monitoring and Diagnosis Function" Korean Registered Patent No. 1579939 "Photovoltaic power generation system with diagnostic function for electric fire due to overheating and arc detection"

The present invention prevents an arc from occurring on a connection electronic circuit board provided inside a connection board, detects a connection failure of all connection terminals having a high risk factor of fire through a connection failure detection sensor, The present invention provides an electric fire prevention system for a photovoltaic power generation facility that can prevent a fire for a connection panel by performing an operation.

In an embodiment, an electrical fire protection system for a solar power plant includes a unit solar string comprising at least one solar panel, a connection panel for collecting solar photovoltaic power of the unit solar photovoltaic string, And an inverter for converting the power of the photovoltaic power generation device into a commercial power, wherein the connection panel includes a voltage and current detection function, a reverse current prevention function, and a circuit protection function for the photovoltaic power generation At least one connecting electronic circuit board for measuring an amount of power generated by the unit solar string and determining whether the unit solar string is normal or not; A breaker for connecting the photovoltaic power to the inverter; A connection electronic circuit board and a plurality of connection terminals each of which is connected between the connection electronic circuit board and the circuit breaker; At least one connection failure detection sensor for detecting heat generated at the connection terminal; And at least one connection failure indicator for integrally managing the detection results of the plurality of connection failure detection sensors and indicating a detection state of connection failure of the connection terminals.

The electric fire prevention system of the photovoltaic power generation system may further include a determination unit for determining whether or not the fuse is disconnected for the circuit protection function of the connection unit, the connection failure of the connection terminal, the magnitude of the generated current and the generated voltage of the unit solar string, And a connection semi-integrated manager including a communication module for performing integrated management of a connection module including a temperature monitoring function and for remote monitoring of the photovoltaic power generation facility.

Wherein the connection electronic circuit board uses an input connection terminal through which the generated power of the unit solar string is inputted as a polarity separation terminal block so that the (+) terminal and the (-) terminal are separated from each other, And the output connection terminal is output in the form of a bus bar.

The connection electronic circuit board is characterized in that a cut-out portion is formed at a central portion to form a predetermined distance between the (+) terminal and the (-) terminal.

Wherein the connection electronic circuit board is formed with a single connection terminal to which only one polarity conductor of (+) polarity and (-) polarity is connected when the (+) terminal and the (-) terminal of the unit solar string are connected, So that the main current flows through the single connection terminal.

The cable ducts are arranged so that the positive (+) polarity and the negative (-) polarity conductors are separated from each other when the (+) terminal and the negative terminal of the unit solar light string are connected, And the duct is formed of a metal material.

The connection failure detection sensor uses a thermistor, and at least three thermistors are connected in parallel for an input connection terminal, an output connection terminal, and a fuse terminal for circuit protection of the unit solar string.

Wherein the connection electronic circuit board includes a control unit for measuring the amount of power generated by the unit solar light string through the voltage and current sensing function and determining the normal operation of the unit solar light string through the disconnection detection function, And a fire prevention processor using the connection failure detection sensor.

Wherein the fire prevention processor includes a temperature measurement module for measuring and displaying the temperature A when the temperature is higher than the reference temperature reference and the temperature B when the temperature is lower than the reference temperature through the connection failure detection sensor; A connection failure indication module for comparing the temperature A and the temperature B with a predetermined alarm set temperature and for indicating an individual connection failure when the temperature A and the temperature B are higher than the alarm set temperature; If the temperature difference between the A temperature and the B temperature is greater than the predetermined threshold by comparing the A temperature and the B temperature relatively when the A temperature and the B temperature are lower than the alarm set temperature, A connection failure judgment module for comparing the difference of the second current at the temperature and judging that the heat is generated due to the connection failure if the difference between the first current and the second current is small; And a communication module for integrating the data generated by the temperature measurement module, the connection failure indication module and the connection failure determination module and transmitting the combined data to the connection semi-integrated management device for integrated management of the connection half.

Wherein the fire alarm analysis processing unit measures an internal average temperature of the connection module and analyzes the internal temperature of the connection module according to the temperature A And a temperature information collection module for collecting temperature B; A temperature correction module for detecting a minimum value and a maximum value of the A temperature and the B temperature, and correcting the collected A temperature and B temperature to the current temperature; An alarm generating module for comparing the maximum value of the A temperature and the B temperature with a predetermined alarm set temperature and generating an alarm when the maximum value of the A temperature and the B temperature is higher than the alarm set temperature; A blocking operation module for outputting a blocking signal indicating a blocking operation of the circuit breaker when the highest value of the A temperature and the B temperature exceeds a preset trip setting value; And a communication module for collecting information generated from the temperature information collecting module, the temperature correcting module, the alarm generating module and the blocking operation module as state information and transmitting the collected information to an external device.

The electric fire prevention system of the photovoltaic power generation system of the present invention is a system in which a cut-off portion is formed on a connection electronic circuit board or a separation distance between (+) and (- This makes it possible to prevent the occurrence of arcing or to prevent the occurrence of fire due to the occurrence of an arc, and it is possible to detect the connection failure of all connection terminals through a connection failure detection sensor as a thermal sensitive element, Therefore, it is possible to minimize the economic loss due to the connection fire, the damage of the person, and the spread of the burden.

1 is a view for explaining an electric fire prevention system of a solar power generation facility according to an embodiment of the present invention.
2 is a view for explaining an internal configuration and a placement state of a general connection module.
3 is a view for explaining an internal configuration and an arrangement state of an electric fire prevention system of a solar power generation facility according to the present invention.
Fig. 4 is a view for explaining a connection electronic circuit board which is a part of Fig. 1; Fig.
Fig. 5 is a view for explaining a configuration of a fire prevention processor of a control part which is a part of Fig. 1; Fig.
6 is a flow chart for explaining the operation of the fire prevention processor of FIG.
7 is a view for explaining the configuration of a fire analysis processing unit of the connection semi-integrated management unit, which is a component of Fig. 1
8 is a flowchart for explaining the operation of the fire analysis processing unit in Fig.

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

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

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

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

It should be understood that the singular " include "or" have "are to be construed as including a stated feature, number, step, operation, component, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

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

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

1 is a view for explaining an electric fire prevention system of a solar power generation facility according to an embodiment of the present invention.

Referring to FIG. 1, a photovoltaic power generation system includes a unit solar light string 110, a connection unit 200, and an inverter 300 including at least one solar panel 100.

The solar panel 100 collects incident solar light to produce electric energy, and the unit solar string 110 is a group in which at least one solar panel 100 is connected in series, Collects the solar photovoltaic power of the unit solar photonic string 110, and the inverter 300 converts the solar photovoltaic power into commercial power and outputs it.

The connection board 200 includes a reverse current prevention diode 210, a fuse 220 for a circuit protection function, a voltage sensing circuit unit 230 for sensing the generation voltage of the unit solar string 110, a unit solar string 110, A breaker 225 for connecting or disconnecting the inverter 300, a break line monitoring circuit 250 for detecting and displaying a fault of the fuse 220 and the diode 210, And detects the amount of power generated by each unit solar string 110 through the disconnection display circuit unit 260, the voltage sensing circuit unit 230 and the current sensing circuit unit 240, And a control unit 215 for determining whether or not the optical string 110 is normally operated.

The connection block 200 includes a reverse current prevention diode 210, a protection function fuse 220, a voltage sensing circuit portion 230, a current sensing circuit portion 240, a disconnection monitoring circuit portion 250, a disconnection display circuit portion 260, The control unit 215 is implemented on the connection electronic circuit board 205 and the connection electronic circuit board 205 is connected to the unit solar light strings 110 is connected to the photovoltaic power.

At this time, since a connection failure may occur at the connection terminal 270 through which a high voltage and a high current flow, the connection panel 200 may be provided with a connection failure sensor 280 around the connection terminal 270, And a connection failure indication unit 290 for detecting the heat generated in the connection failure detection unit 270, and separately displaying the connection failure status while integrally managing the connection failure detection sensor 280.

In order to sense heat due to the connection failure, the connection electric circuit board 205 is provided with an expensive sensor for detecting smoke, an arc or a gas. However, in the present invention, By attaching the connection failure detection sensor 280 as a sensor, it is possible to detect the heat generated due to the connection failure in real time.

The connection failure detection sensor 280 uses a thermistor whose resistance value varies depending on the temperature. For example, the thermistor is a thermosensitive element that varies from 10 k? At 25 占 폚 to 25? K at 40 占 and from 80? To 1.2?.

The connection failure detection sensor 280 needs to be installed at each of the input connection terminal, the output connection terminal, and the fuse terminal of each unit solar string 110, and therefore at least three units are required for each connection electronic circuit board 205.

In the case of using three connection failure detection sensors 280, a complicated operation circuit for reading the change amount of the resistance value and converting it to the temperature should be added. In the present invention, three connection failure detection sensors 280 are connected in series or parallel to operate as one sensor in order to reduce the complexity of the circuit. In the present invention, three connection failure detection sensors 280 are connected in parallel to detect a high temperature, and the maximum temperature is sensed by a minimum resistance value.

On the other hand, the connection panel 200 measures the voltage and current of all the unit solar strings 110 and determines the presence or absence of disconnection of the fuse 220, connection failure of the connection terminal 270, And a connection half integrated manager 295 for integrated monitoring of the internal temperature, and the integrated manager 295 can remotely communicate with an external device via a communication module (not shown).

FIG. 2 is a view for explaining an internal configuration and an arrangement state of a general connection panel, and FIG. 3 is a view for explaining an internal configuration and an arrangement state of an electric fire prevention system of a photovoltaic power generation facility according to the present invention.

Referring to FIG. 2, a general connection board 200 connects unit solar strings 110 in parallel, collects the generated power of all the unit solar strings 110, and sends them to the inverter 300. That is, all the unit solar strings 110 are connected to the breaker 225 through the connecting electronic circuit board 205. Therefore, the connection electronic circuit board 205 is designed to have sufficient electrical stability, and the connection terminal 270 connected to the outside is formed of a material having a minimum withstand voltage of 1000 V class rating.

In addition, the input / output of the connection terminal 270 is arranged so as to be separated from each other in left and right (or up and down) for convenience of wiring and convenience of circuit design.

However, the condensation phenomenon may occur inside the connection block 200 in an extreme situation such as seawater and high humidity environment. Due to such condensation phenomenon, at the point where the inter-pole distance of the connection electronic circuit board 205 is the shortest A conductive path may be formed and an arc may be generated. Particularly, the generated power of the solar light string 110 operates as a DC current source, which may lead to a large fire due to a single arc.

Therefore, the electric fire prevention system of the photovoltaic power generation facility of the present invention is arranged so as to secure a separation distance between the (+) conductor and the (-) conductor of the solar string 110 as shown in FIG.

(+) Polarity (+) polarity to sufficiently separate the (+) and (-) terminals of the input connection terminal of the solar light string 110 in order to prevent the fire caused by the arc generated inside the connection board 200 The terminal board 273 and the (-) polarity terminal board 272 are used in the form of a busbar in order to reduce the use of cable wires, which are likely to cause poor contact between the connecting electronic circuit board 205 and the circuit breaker 225 do.

At this time, the insulation fixing devices 301 and 302 for electrical insulation are provided at predetermined intervals in the conductors arranged inside the connection block 200.

As a result, the (+) conductor and the (-) conductor can be prevented from being simultaneously connected in one connection electronic circuit board 205, thereby physically suppressing arc generation.

Fig. 4 is a view for explaining a connection electronic circuit board which is a part of Fig. 1; Fig.

4A, the connection electronic circuit board 205 in the general connection panel has an input connection terminal of the solar string 110 connected to the (+) terminal and a (-) terminals are connected at the same time, and the output connection terminal is also connected to the breaker 225 at the (+) terminal and the (-) terminal simultaneously.

In this connection electronic circuit board 205, even if the distance between the (+) conductor and the (-) conductor is secured, the occurrence rate of the arc may be increased when moisture or conductive foreign matter due to external factors is inserted. When carbonization due to arc is generated, the connecting electronic circuit board 205, which is an electrical insulator, becomes a conductor and forms a complete conductive path, thereby causing a high current to flow on the connecting electronic circuit board 205 and causing a fire.

4 (b), the connection electronic circuit board 205 is formed at its center with a cut-out portion 206 having a predetermined length. The cut-out portion 206 includes a positive terminal and a negative terminal. So that the separation distance between the terminals can be physically secured.

In the case where conductive foreign matter is temporarily adhered to the connection electronic circuit board 205 formed with the cut-out portion 206, when the conductive foreign matter is carbonized and removed, the cut- So that only the carbonized portion is damaged and no fire occurs.

Referring to FIG. 4C, the connection electronic circuit board 205 is connected to the single connection terminals 274 and 275 so that only one polarity line of the (+) polarity and the (-) polarity is connected, . At this time, the single connection terminals 274 and 275 are (-) terminals, and the main current flows through the (-) terminal. At this time, a positive (+) terminal, that is, an S + terminal 276 is used for the voltage measurement, and since no current flows in the S + terminal, the possibility of arc generation is very low.

(+) / (-) polarity is not disposed on one cable duct when the (+) terminal and the (-) terminal of each unit solar optical string 110 are connected to the connecting electronic circuit board 205 Cable ducts for positive (+) conductors and cable ducts for negative (-) conductors are arranged separately from each other. Cable ducts are also made of metal because they are vulnerable to fire.

As such, due to the disposition of the conductors where the terminals of (+) polarity and (-) polarity are separated, the connection electronic circuit board 205 can secure stability even when a conductive foreign matter is adhered, Even if heat is generated due to connection failure at the polarity separation terminal 271, there is an advantage that it is merely disconnection and no fire occurs.

FIG. 5 is a view for explaining the configuration of the fire prevention processor of the control unit, which is a component of FIG. 1, and FIG. 6 is a flowchart for explaining the operation of the fire prevention processor of FIG.

Referring to FIGS. 5 and 6, since a plurality of connection failure detection sensors 280 connected in parallel can reduce the total resistance when the ambient temperature of the connection terminal 270 is increased on average, the control unit 215 detects a plurality of connection failure It may be difficult to judge which sensor of the sensor 280 has sensed the temperature rise.

Therefore, the control unit 215 of the fire prevention processor 400 implements a fire prevention function using the connection failure detection sensor 280. The fire prevention processor 400 detects the internal average temperature of the connection unit 200 and other peripheral electronic circuit boards 205 And compares the present current amount difference to detect whether or not the connection terminal 270 is defective.

The fire prevention processor 400 includes a temperature measurement module 410, a connection failure indication module 420, a connection failure determination module 430, and a communication module 440.

The temperature measurement module 410 measures and displays the temperature A and the temperature B of the connection terminals at different positions via the connection failure detection sensor 280. (S101)

The connection failure indication module 420 compares the A temperature and the B temperature with the preset alarm set temperature, and when the A and B temperatures are higher than the alarm set temperature, the individual connection failure (S102 to S104) For example, an identification number or an identification color (for example, colored LED) is set in advance for each of the connection failure detecting sensors 280 provided at the input connecting terminal, the output connecting terminal and the fuse terminal And the connection failure display section 290 displays the identification number or identification color of the connection failure detection sensor 280 that senses the temperature rise so that it is possible to identify to which connection terminal 270 the connection failure has occurred.

If the A temperature and the B temperature are lower than the alarm set temperature, there is no fire risk, but the connection failure judgment module 430 compares the A temperature and the B temperature relative to each other to check the heating state at the connection terminal 270 If the temperature difference between the A temperature and the B temperature is greater than a preset threshold value, the connection failure determination module 430 compares the temperature difference between the first current at the A temperature and the B temperature If the difference between the first current and the second current is small, it is judged that heat is generated due to the connection failure, and the connection failure state is individually alarmed. (S106 to S109)

The communication module 440 collectively transmits the data generated by the temperature measurement module 410, the connection failure indication module 420 and the connection failure determination module 430 to the connection half integration manager 295. In operation S110,

FIG. 7 is a diagram for explaining the configuration of a fire analysis processing unit of the connection semi-integrated management unit, which is a component of FIG. 1, and FIG. 8 is a flowchart for explaining the operation of the fire analysis processing unit of FIG.

The control unit 215 of the connection electronic circuit board 205 performs the analysis of the measured temperature and the fire prevention operation primarily through the connection failure detection sensor 280 through the fire prevention processing unit 400, The fire prevention processing unit 295 performs a fire analysis processing function to secondarily perform detailed analysis using the data transmitted through the fire prevention processing unit 400. [

7 and 8, the fire analysis processing unit 700 includes a temperature information collection module 710, a temperature correction module 720, an alarm generation module 730, a shutdown operation module 740, and a communication module 750, .

The temperature information collection module 710 measures the internal average temperature of the connection module 200, collects the A temperature and the B temperature of the unit solar strings transmitted through the fire prevention processor 400, And collects status information (S201, S202)

Since the connection failure detection sensor 280 is connected in parallel with the thermistor, which is a thermal sensitive device, the influence of the ambient temperature affects the measured temperature A and temperature B, Module 720 performs a task of calibrating the measured A temperature and B temperature to the current temperature by the connection half integrated manager 295. [ That is, the thermistor used as the connection failure detection sensor 280 is not limited to sensing only the generation of heat due to the connection failure at the connection terminal 270, but also affected by the reaction depending on the ambient temperature, .

Accordingly, the temperature correction module 720 corrects the A temperature and the B temperature to the current temperature to remove the influence on the ambient temperature, and detects the A temperature and the B temperature of all the unit solar strings 110 (S203, S204)

When the maximum value of the temperature A and the temperature B is higher than the preset alarm temperature, the alarm generating module 730 issues an alarm and notifies the administrator of the alarm when the maximum value of the temperature A and the temperature B becomes higher than the alarm set temperature. , S206)

When the maximum value of the A temperature and the B temperature is lower than the alarm set temperature but the trip setting value is exceeded, the cutoff operation module 740 cuts off the flow of the current by interrupting the breaker 225 connected to the inverter 300 Pre-shut off to prevent heat from fire due to connection failure. (S207, S208)

The communication module 750 integrates information generated in the temperature information collection module 710, the temperature correction module 720, the alarm generation module 730 and the blocking operation module 740 into status information so that the administrator can remotely monitor the communication module 750 And then remotely transmits it to the external device (S209)

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

100: Solar panel 110: Unit solar string
200: connection board 205: connection electronic circuit board
210: reverse current prevention diode 220: fuse
215: Control unit 280: Connection failure detection sensor
290: connection failure indicator 295: connection half integration manager
400: Fire Prevention Unit
700: Fire analysis processor

Claims (10)

1. A solar power generation system comprising: a unit solar string including at least one solar panel; a connection unit for collecting solar photovoltaic power of the unit solar photovoltaic string; and an inverter for converting the solar photovoltaic power into commercial power In a fire protection system,
In the above-
And a circuit protection function for measuring the amount of power generated by the unit solar light string and determining whether the unit solar light string is normally operated or not At least one connecting electronic circuit board;
A breaker for connecting the photovoltaic power to the inverter;
A connection electronic circuit board and a plurality of connection terminals each of which is connected between the connection electronic circuit board and the circuit breaker;
A connection failure in which at least three thermistors are connected in parallel to sense heat generated from an input connection terminal, an output connection terminal, and a fuse terminal for circuit protection of the unit solar string, Detection sensor;
At least one connection failure indication unit for integrally managing detection results of the plurality of connection failure detection sensors and indicating a detection state of connection failure of the connection terminals; And
The integrated management of the connection module including the function of monitoring whether the fuse is disconnected for the circuit protection function of the connection module, the connection failure of the connection module, the magnitude of the generated current and the generated voltage of the unit solar string, And a connection semi-integrated manager including a communication module for remote monitoring of the photovoltaic power generation facility,
The connection electronic circuit board includes a temperature measurement module for measuring and displaying A temperature and B temperature of connection terminals at different positions via the connection failure detection sensor, comparing the A temperature and the B temperature with predetermined alarm set temperatures A connection failure indication module for indicating an individual connection failure when the temperature A and the temperature B are higher than the alarm set temperature; and a connection failure indication module for indicating a connection failure when the temperature A and the temperature B are lower than the alarm set temperature, If the temperature difference between the A temperature and the B temperature is larger than the preset threshold value, the difference between the first current at the A temperature and the second current at the B temperature is compared to determine whether the difference between the first current and the second current is small The connection failure determination module, and the data generated in the temperature measurement module, the connection failure indication module, and the connection failure determination module, which are determined as the occurrence of heat due to the connection failure, And a communication module for transmitting the management information to the connection semi-integrated management device for integrated management of the semi-integrated management module,
And a fire analysis processor for analyzing the data received through the fire prevention processor, wherein the fire analysis processor measures an internal average temperature of the connection module, A temperature correction module for correcting the collected A temperature and B temperature to a current temperature and detecting a minimum value and a maximum value of the A temperature and the B temperature; And an alarm generating module for generating an alarm when the maximum value of the A temperature and the B temperature is higher than the alarm set temperature, and a maximum value of the A temperature and the B temperature are set to a predetermined trip setting value A shutdown operation module for outputting a shutoff signal for instructing a shutoff operation of the circuit breaker, And a communication module for collecting information generated in the module and the blocking operation module as state information and transmitting the collected information to an external device.
delete The method according to claim 1,
The connecting electronic circuit board includes:
An input connection terminal to which generated power of the unit solar light string is inputted is used as a polarity separation terminal so that a (+) terminal and a (-) terminal are separated from each other,
And the connection terminal of the output connection terminal from which the generated power of the unit solar string is output is used in the form of a bus bar.
The method according to claim 1,
Wherein the connection electronic circuit board has a cut-out portion formed at a central portion thereof to form a predetermined distance between the (+) terminal and the (-) terminal.
The method according to claim 1,
Wherein the connection electronic circuit board is formed with a single connection terminal to which only one polarity conductor of (+) polarity and (-) polarity is connected when the (+) terminal and the (-) terminal of the unit solar string are connected, And the main current flows through the single connection terminal.
The method according to claim 1,
Wherein the connecting electronic circuit board is disposed so that cable ducts are separated from each other such that a lead wire of positive polarity and a lead of negative polarity are separated from each other when the (+) terminal and the negative terminal of the unit solar string are connected, Wherein the cable duct is formed of a metal material. delete delete delete delete

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