KR102062217B1 - Fire Sensing Method of Connection Board For Solar cell Power System - Google Patents

Abstract

The present invention relates to a fire detection method for a photovoltaic system connection board. In the present invention, a disaster responsive connection box comprises: an earthquake detector detecting earthquakes; a fire detector detecting fires; a gas-injected fire extinguisher emitting gases to extinguish fires; and a control device. The control device comprises: a main CPU; a valve on/off controller connected with the gas-injected fire extinguisher; a sensing unit connected with the earthquake detector and the fire detector to receive and process a detection signal; a blocking control unit controlling a circuit breaker to cut off the power from a photovoltaic panel; a communication means for communication with a monitoring system; and a power unit supplying connection board using power. The fire detection method for a photovoltaic system connection board comprises: a first step of measuring the temperature at 1 second intervals; a second step of determining whether the temperature value was accumulated 120 times in 1 second intervals; a third step of calculating the average temperature by averaging 120 temperature values accumulated in 1 second intervals; a fourth step of measuring temperature at 1 second intervals; a fifth step of determining whether the temperature value was accumulated 10 times in 1 second intervals; a sixth step of obtaining the average of the short-term average temperature values through the average of 10 temperature values at the 1 second intervals; a seventh step of determining whether the short-term average temperature is above 1°C higher than the average normal temperature; and an eight step of recognizing the fire if the short-term average temperature is 1°C or higher in the seventh step and notifying the control device of the result. According to the present invention, the fire of the connection board can be quickly and accurately detected, thereby preventing the fire of the connection board.

Description

Fire Sensing Method of Connection Board For Solar cell Power System

The present invention relates to a photovoltaic system connection panel fire detection method, and more particularly, to measure the average value by accumulating the temperature value at intervals of 1 second through a fire detector for detecting the fire of the connection panel and continuously every 1 second By measuring the temperature value and comparing each other and comparing the difference between the normal temperature and the short-term average temperature to detect the fire of the interface, the fire detection of the interface can be detected quickly and accurately. The present invention relates to a fire detection method for a solar panel system connection panel.

The photovoltaic power generation system is to produce electric power by converting light energy incident from the sun into electric energy, and is located between a solar cell array, a solar cell array, and an inverter that converts light energy into electric energy of direct current. It consists of a connection panel for collecting the DC power generated in and a power converter (inverter) for converting the DC power into AC power.

Factors affecting the amount of photovoltaic power generation in photovoltaic power generation efficiency can be largely divided into natural and technical factors. The amount of light available from the sun by environmental conditions and climatic conditions is difficult to control artificially. Therefore, attention is being drawn to technically improving the problems of the devices forming the photovoltaic system.

In the case of a photovoltaic power generation system which is mainly installed in a secluded outdoor area, it is difficult to quickly detect an abnormal situation in case of a failure in photovoltaic power generation performance or failure. By the way, there is no choice but to judge the abnormality based on the measured amount of total generated power of the entire photovoltaic system.

In addition, even if an abnormal condition is detected, it is difficult to find the cause of the problem and take appropriate measures. In general, finding a problem in an abnormal state requires a non-destructive test using separate equipment such as a human visual inspection or a vortex inspection, and a large amount of power loss is unavoidable until it is operated in a normal state. Furthermore, it can lead to damage of the components of the photovoltaic system, and if the durability of each component is not satisfied, it also adversely affects the energy efficiency of obtaining alternative energy.

It looks at the connection panel of the conventional photovoltaic system. In the process of processing high voltage DC power provided by panel array, the solar power generation system may overheat the inside of the connection panel due to internal factors or cause a fire such as a short circuit due to condensation. The risk of overheating and fire increases even more. In addition, when an earthquake occurs, the solar system is seriously affected, and thus a power accident is likely to occur.

Need for disaster response interface

The access panel is not in a condition that can be maintained and managed by the administrator at all times. Therefore, when a fire occurs, it is necessary to detect fire automatically and extinguish the fire early.

In addition, when an earthquake occurs that may cause damage to the system, a function that detects an earthquake early and cuts off power to prevent further damage is required.

[Preceding technical literature]

Korea Patent Registration No. 10-1645656 (Registration date July 29, 2016) (Name of the invention: PV system with disaster prevention function)

The present invention has been proposed in view of the conventional necessity as described above, by measuring the average value through the accumulation of the temperature value in the connection panel through a fire detector and continuously measuring the temperature value and comparing with each other and the normal temperature and the short-term average temperature By comparing the difference between the two and detecting the fire of the connection panel, it is possible to quickly and accurately detect the fire of the connection panel, thereby providing a connection panel fire detection method of the new type of photovoltaic power generation system that can prevent the connection panel fire. have.

In accordance with an embodiment of the present invention for achieving the object as described above, a solar power generation system comprising a disaster response junction box and an inverter, the disaster response junction box is an earthquake detector for detecting an earthquake, fire It includes a fire detector for detecting, a gas injection type fire extinguisher for emitting a gas for extinguishing the fire, the control device, the control device CPU for transmitting and receiving control signals, a valve on / off controller connected to the gas injection type fire extinguisher, the earthquake detector and A sensing unit connected to a fire detector for receiving and processing a detection signal, a blocking control unit for controlling a breaker to cut off power from a solar panel, a communication means for communicating with a monitoring system, and a power supply for using a connection panel. In the solar power system connection panel fire detection method comprising a power supply,

A first step of measuring the temperature at one second intervals,

A second step of determining whether the temperature value has been accumulated 120 times at 1 second intervals,

A third step of calculating a normal temperature by averaging 120 temperature values accumulated in a one second interval thereafter;

Thereafter, the fourth step of measuring the temperature at intervals of 1 second,

Thereafter, a fifth step of determining whether the temperature value is accumulated 10 times at 1 second intervals,

Thereafter, a sixth step of obtaining a short-term average temperature value by averaging the ten temperature values at the 1 second intervals,

Thereafter, the seventh step of determining whether the short-term average temperature is more than 1 ℃ than the normal temperature,

An eighth step of recognizing a fire and notifying the control device of the result when the temperature is 1 ° C. or higher in the seventh step,

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The normal temperature calculated in the third step is continuously updated by a value continuously measured at a one second interval thereafter,

The short-term average temperature value calculated in the sixth step is characterized in that it is continuously updated by the value continuously measured at a one second interval thereafter,
The normal temperature calculated after the third step is continuously updated by a value which is subsequently measured sequentially at 1 second intervals,
The control device continuously updates the normal temperature while continuously measuring the temperature value at 1 second intervals, and also updates the short-term average temperature value while continuing to accumulate the temperature value 10 times at 1 second intervals,
After the normal temperature is calculated from 1 to 120 cumulative steps, the subsequent normal temperature is continuously updated from 121 times and subsequent processes are continuously updated, and the short-term average temperature value is calculated from 121 to 130 times at the same time. As the short-term average temperature value is continuously accumulated from 131 times through the subsequent process, the previous short-term average temperature value is continuously updated, and the controller compares the initial normal temperature and the initial short-term average temperature value to 1 The process of judging whether the temperature is above ℃ is continued, and the process of judging whether the temperature is above 1 ℃ is compared by comparing the continuously updated normal temperature and the short-term average temperature value.
It further includes two arc detectors for detecting the arc generated from the problem of the contact point of the electrical circuit,
The control unit of the control device, when the detection signal of the state from one arc detector is input to the control device, and then sends a detection signal to the monitoring system, and at the same time compares the temperature measurement value and judges that the fire of the fire extinguisher The fire detection method of the solar power generation system connection panel, characterized in that the eruption, and when both are detected to send a detection signal to the monitoring system and at the same time the gas of the fire extinguisher.

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As described above, according to the photovoltaic system connection panel fire detection method according to the present invention, the average temperature is measured by accumulating the temperature values of the connection panel through the fire detector, and the temperature values are continuously measured and compared with each other. By comparing the difference between the average temperature and detecting whether the connection panel is fired, it is possible to quickly and accurately detect the fire of the connection panel, thereby preventing the fire of the connection panel.

In addition, by installing a plurality of arc detectors and earthquake detectors in addition to the fire detector (fire sensor), it is possible to increase the reliability for the detection of the detection signal, and works together with the fire detection signal to prevent the safety accident of the connection panel. It has an effect.

1 is a conceptual diagram illustrating a schematic configuration of a photovoltaic system according to the present invention.
2 is a table showing an example of the operation test and the non-operation test criteria of the existing differential sensor product inspection criteria.
3 is a flowchart sequentially showing an example of a connection panel fire detection method of a photovoltaic system according to the present invention.

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description.

However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

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. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention. In the following description of the present invention, the same reference numerals are used for the same elements in the drawings and redundant descriptions of the same elements will be omitted.

Hereinafter, with reference to the accompanying drawings will be described in detail embodiments of the connection panel fire detection method of the photovoltaic power generation system according to the present invention.

1 is a conceptual diagram illustrating a schematic configuration of a photovoltaic system according to the present invention, Figure 2 is a table showing an example of an operation test and a non-operation test standard of the existing differential sensor product inspection standards, Figure 3 is a present invention It is a flowchart which shows an example of the connection board fire detection method of the photovoltaic power generation system sequentially.

A photovoltaic power generation system according to the present invention will be described with reference to FIG. 1. As used herein, the term "connection board" refers to the disaster response junction box 110 below.

The photovoltaic power generation system 100 includes a disaster response junction box 110, an inverter 200, and a monitoring system 400.

That is, the disaster response junction box 110

Earthquake detector (10) for detecting earthquakes,

Fire detector 20 to continuously detect the temperature value in order to detect a fire,

One or more arc detectors (50,60) for detecting arcs,

A gas injection extinguisher (30) for ejecting a gas for extinguishing a fire,

Control device 40,

The control device 40

CPU 41 for transmitting and receiving a control signal,

A valve on / off controller 43 connected to the gas injection extinguisher 30,

A sensing unit 42 connected to the earthquake detector 10, the fire detector 20, and the arc detectors 50 and 60 to receive and process a detection signal;

Blocking control unit 44 for controlling the circuit breaker (MCCB, DC wiring breaker) 93 to cut off the power from the solar panel 300,

Communication means 46 for communication with the monitoring system 400, and

And a power supply unit 45 for supplying power for connection board use.

A positive (+) red cable 70 and a negative (-) blue cable 80 are connected between the inverter 200 and the circuit breaker 93. In the red cable 70 and the blue cable 80, the inverter is connected. The part connected to the (200) side is a general power (power) cable, the part connected to the breaker (93) side is characterized by consisting of a connector and a flame retardant cable, respectively.

Detailed descriptions of components such as internal components generally known in the disaster response junction box 110, fuses / diodes 91, bus bars 92, and ACB circuit breakers 94 are omitted. Let's do it. The EBL (AC Earth Leakage Circuit Breaker) 94 is controlled by the blocking controller 44.

The communication means 46 and the monitoring system 400 are assumed to be RS485 communication, but is not limited to this, other wired or wireless communication will of course be possible.

As shown in Figure 1, the disaster response junction box according to the present invention is provided with a fire detection and automatic fire extinguishing function.

In other words, the built-in temperature sensor capable of detecting overheating detects a fire by a differential algorithm (described in FIG. 3) when excessive temperature rise occurs within a certain time (a condition that cannot occur in normal climate and normal operation). And at the same time as the fire detection in the control board (refer to the control device 40) generates alarm information on the fire occurrence and transmits to the monitoring system 400 remotely and sends a cutoff signal to the breaker through the cutoff control unit 44 Disconnect power from

The driving principle of the operating device is that when the control device 40 recognizes the fire detection by the differential algorithm (a new algorithm is applied in the function of the differential detector according to the national fire law), the signal is transferred to the driving motor (not shown) of the gas injection extinguisher. The fire extinguisher valve (not shown) is opened to deliver the extinguishing agent. The medicinal herbs released are gaseous and can cause damage to the electrical device when sprayed into a liquid, while gaseous extinguishment can minimize damage to the electrical device.

In addition, the cable used for wiring from the connection panel to the inverter 200 is ideally used when the flame retardant cables (TFR-CV, F-CV, FR-CV), etc., are used. Only the half power output part) applies the flame retardant cable and uses the waterproof connector 80, and after the output of the connection panel, the general power line cable 70 is used to reduce the cost in the cost part. The mechanism of delivery can be blocked.

Earthquake Detection and Power Shutoff

According to the present invention, when the earthquake sensor 10 is installed in the connection box for earthquake detection and an earthquake of intensity that may damage the system occurs, the control device 40 cuts the input / output power of the solar system to prevent the earthquake. It prevents the primary damage, prevents secondary safety accidents such as fire due to power line damage and short circuit, etc., and transmits earthquake information to the monitoring system 400 in real time.

Conventional Differential Algorithm

Existing differential sensor product inspection criteria are as shown in FIG. That is, referring to Figure 2, the sensitivity of the differential spot detector should be suitable for the following test criteria according to the values of K, V, N, T, M, k, v, n, t and m for each type. .

Operation test

When operated in a vertical airflow at a K K higher than room temperature and at a wind speed of V cm / s, it shall operate within N seconds.

When operating in a horizontal air stream rising at a linear rate of T ° C / min from room temperature, it should be operated within M minutes.

Non-operational test

In the case of input into a vertical airflow at a temperature higher than room temperature by k ° C and with a wind speed of v cm / s, it shall not operate within n minutes.

In the case of input into a horizontal air stream rising at a linear rate of t ° C / min from room temperature, it shall not operate within m minutes.

[Source: Technical Standard for Type Approval and Product Inspection of No. 2017-05 Detector]

Existing Differential Fire Detection Method

Stair Rise-Check the temperature every certain time, and if the temperature is 30 ℃ higher than room temperature and put into 15cm / s vertical airflow, the stairs will be recognized within 30 seconds and the result will be notified.

Straight line up-cumulative When the value of checked temperature rises at a linear rate of 15 ℃ / min, it is recognized as a fire and the control unit is notified of the result.

Problems in applying the conventional differential type solar panel

If the temperature rises to 30 ℃ for up to 30 seconds, it is recognized as a fire and is operated. Therefore, the fire reaction rate is slow, and early detection and response of the early stage of fire occurrence is early and notified to the user. In particular, when differential fire detection is applied to the solar panel, it is difficult to detect the fire early, which may lead to a great damage.

Necessity of Differential Fire Detection Algorithm for Photovoltaic Junction Panel

In case of solar connection panel, it is mostly installed outside, so the outdoor temperature condition is different from the indoors, and the temperature rises rapidly due to self-heating, and the space area is relatively narrow, so the characteristics of the natural temperature and the temperature in case of fire Ascending patterns show a great deal of difference, and if there is no early detection of fire, secondary damage occurs, requiring a new precise and accurate differential algorithm.

Explanation of Differential Algorithm for Solar Junction Panel of the Present Invention

120 times (120 seconds) of temperature values are stored sequentially in order of calculating the average temperature, and the average temperature value (1st temperature value + 2nd temperature value +… 120th temperature value / 120 times) is calculated and stored. .

Since the temperature is updated in units of 1 second, the initial temperature value is deleted and the average value is updated to reflect the latest temperature value.

In order to measure short-term temperature change, ten times (10 seconds) of temperature value are stored sequentially and the short-term average temperature value (1st temperature value + 2nd temperature value +… 10th temperature value / 10 times) is stored. Calculate.

Since the temperature is updated in units of 1 second, the initial temperature value is deleted and the average value is updated to reflect the latest temperature value.

When the short-term average temperature is 1 ℃ higher than the normal temperature value is detected as a fire and transmits a signal to the control device (40).

Referring to FIG. 3, a flow chart of the differential algorithm for the solar panel is shown.

First, the temperature is measured at 1 second intervals (S2).

Thereafter, the controller 40 determines whether the temperature value has been accumulated 120 times at an interval of 1 second (S4).

Thereafter, the normal temperature is calculated after the step S4 (averaging the temperature values of 120 times for 1 second intervals).

Then, the temperature is measured at 1 second intervals (S8).

Then, it is determined whether the temperature value is accumulated 10 times at 1 second intervals (S10).

Then, the average of the short-term average temperature value is obtained (S12) (at this time, the temperature value is averaged 10 times at 1 second intervals).

After that, it is determined whether the short-term average temperature is more than 1 ℃ than the average temperature (S14).

If it is 1 ° C or more in step S14, the fire is recognized and the control device 40 is notified of the result (S16).

The normal temperature calculated after the step S4 is continuously updated by the values sequentially measured at 1 second intervals thereafter, and the short-term average temperature value calculated at the step S10 is continuously updated at 1 second intervals thereafter. It is characterized in that it is continuously updated by the value which is measured sequentially. In other words, the controller continuously updates the normal temperature while continuously measuring the temperature value at 1 second intervals, and updates the short-term average temperature value continuously while continuously accumulating the temperature value 10 times at 1 second intervals. It is done. That is, since the normal temperature is calculated from one to 120 cumulative cycles, the subsequent normal temperatures are continuously updated from 121 times and subsequent processes are continuously accumulated. In addition, from 121 to 130 times will be used in the process of calculating the short-term average temperature value at the same time. Likewise, the short-term average temperature value is continuously accumulated from 131 times, and the previous short-term average temperature value is continuously updated. The controller continues the process of determining whether the temperature is 1 ° C or higher by comparing the initial normal temperature and the initial short-term average temperature value, and the temperature is 1 ° C or higher by comparing the continuous temperature and the short-term average temperature value which are continuously updated. The process of judging authorization is continued.

In the above description, the one-second interval temperature value accumulation count, the one-second interval temperature measurement, and the tenth temperature value accumulation count are not limiting and may be variable.

According to the fire detection method of the connection panel of the photovoltaic power generation system according to the present invention, by comparing the difference between the normal temperature and the short-term average temperature while measuring the average value and continuously measuring the temperature value by accumulating the temperature value By detecting whether the fire can be detected quickly and accurately, it is possible to prevent the fire.

In addition, two arc detectors were installed in the embodiment of the present invention, and two arc detectors were installed at appropriate positions according to the direction detected by the arc detector, in particular, in a direction capable of detecting almost all parts of the junction box (the number of installations). Is not limited to two), if the arc generated from the problem of the connection contact of the electrical circuit through the two arc detector, the detection of both ON (ie, AND condition) state from the two arc detector When the signal is input to the control device, the arc detection signal information is characterized in that the transmission through the communication network to the monitoring system.

In addition, the control unit of the control device sends a detection signal to the monitoring system after the detection signal of the state from one arc detector is input to the control device,

When the detection signal of both on state is input to the control device, the control signal is output to the cutoff control unit to control the breaker for blocking the photovoltaic input / output power, and the operation signal is output to the gas injection extinguisher. Gas may be ejected.

Meanwhile, the earthquake detector may prepare for an earthquake by transmitting a detection signal to a monitoring system when an earthquake of a predetermined magnitude or more is detected according to a set magnitude.

As described above, according to the present invention, the condition for fire detection is accumulated at an interval of 1 second to calculate a normal temperature, and then the temperature detection through the temperature sensor is accumulated 10 times at an interval of 1 second, and then compared with the normal temperature. If the temperature difference between the sensor and the temperature sensor is over 1 ℃, it recognizes it as a fire and outputs a fire signal. Through this fire signal, it outputs a control signal that can operate the fire extinguishing system and through this, It is characterized in that the devices operate in conjunction with each other to operate in the on state, through which it detects the fire faster than conventional, and the accuracy of the fire detection accumulates the fire detection interval accumulates and the difference between the current temperature and the normal temperature Compared to the faster it is made faster fire detection speed and accuracy is characterized.

In addition, it is possible to perform a fire extinguishing function by outputting an operation signal to the gas injection type fire extinguisher by providing a gas injection type fire extinguisher, which has not been presented before, in addition to detecting a fire.

Through this, it is possible not only to meet the existing detector conditions, but also to solve the fire detection speed and fire extinguishing device operation problem, which were problems in the conventional sensor detection method.

In addition, by adding an arc detector to the connection panel, it detects the arc generated from the problem of the contact point of the electric circuit and cuts off the power in the same way as the fire signal.In this case, it is not caused by the fire detection. The control signal is not output to operate the fire extinguisher, but the present invention is not limited thereto, and the gas injection fire extinguisher may be programmed and set to operate sequentially after the breaker is unconditionally operated.

According to the present invention, by installing a plurality of one or more arc detectors and earthquake detectors in addition to the fire detection sensor can increase the reliability for the detection of the detection signal, it is operated in conjunction with the fire detection signal can prevent the safety accident of the connection panel in advance. .

In addition, according to the present invention, when it is recognized as a fire detection signal is transmitted to the gas injection type fire extinguisher driving motor (not shown) to open the fire extinguisher valve to release the extinguishing agent. This medicinal herb can damage electrical devices when sprayed with liquids, while minimizing damage to electrical devices at the same time as gas fire extinguishing.

As described above, the best embodiment has been disclosed in the drawings and the specification. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not intended to limit the scope of the invention as defined in the meaning or claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

10: Earthquake Detector
20: fire detector
30: gas fire extinguisher
40: controller
50,60: arc detector
70: (+) Red Cable
80: (-) blue cable
100: solar power system
110: disaster response junction box
200: inverter
300: solar panel
400: monitoring system

Claims (5)

A photovoltaic power generation system comprising a disaster response interface and an inverter, wherein the disaster response interface is an earthquake detector for detecting an earthquake, a fire detector for detecting a fire, a gas injection extinguisher for ejecting a gas to extinguish a fire, and control. The control device includes a main CPU, a valve on / off controller connected to a gas injection fire extinguisher, a sensing unit connected to the earthquake detector and the fire detector to receive and process a detection signal from a solar panel. In the solar power generation system connection panel fire detection method comprising a cut-off control unit for controlling a circuit breaker for shutting off power, a communication means for communicating with a monitoring system, and a power supply unit for supplying power for using a connection panel.
A first step of measuring the temperature at one second intervals,
A second step of determining whether the temperature value has been accumulated 120 times at 1 second intervals,
A third step of calculating a normal temperature by averaging 120 temperature values accumulated in a one second interval thereafter;
Thereafter, the fourth step of measuring the temperature at intervals of 1 second,
Thereafter, a fifth step of determining whether the temperature value is accumulated 10 times at 1 second intervals,
Thereafter, a sixth step of obtaining a short-term average temperature value by averaging the ten temperature values at the 1 second intervals,
Thereafter, the seventh step of determining whether the short-term average temperature is more than 1 ℃ than the normal temperature,
An eighth step of recognizing a fire and notifying the control device of the result when the temperature is 1 ° C. or higher in the seventh step,
The normal temperature calculated in the third step is continuously updated by a value continuously measured at a one second interval thereafter,
The short-term average temperature value calculated in the sixth step is characterized in that it is continuously updated by the value continuously measured at a one second interval thereafter,
The normal temperature calculated after the third step is continuously updated by a value which is subsequently measured sequentially at 1 second intervals,
The control device continuously updates the normal temperature while continuously measuring the temperature value at 1 second intervals, and also updates the short-term average temperature value while continuing to accumulate the temperature value 10 times at 1 second intervals,
After the normal temperature is calculated from 1 to 120 cumulative steps, the subsequent normal temperature is continuously updated from 121 times and subsequent processes are continuously updated, and the short-term average temperature value is calculated from 121 to 130 times at the same time. As the short-term average temperature value is continuously accumulated from 131 times through the subsequent process, the previous short-term average temperature value is continuously updated, and the controller compares the initial normal temperature and the initial short-term average temperature value to 1 The process of judging whether the temperature is above ℃ is continued, and the process of judging whether the temperature is above 1 ℃ is compared by comparing the continuously updated normal temperature and the short-term average temperature value.
It further includes two arc detectors for detecting the arc generated from the problem of the contact point of the electrical circuit,
The control unit of the control device, when the detection signal of the state from one arc detector is input to the control device, and then sends a detection signal to the monitoring system, and at the same time compares the temperature measurement value and judges that the fire of the fire extinguisher The solar power generation system connection panel fire detection method characterized in that the ejection, and if both are detected to send a detection signal to the monitoring system and at the same time the gas of the fire extinguisher.


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