Fire sign detection system for functional power facility

Abstract

The present invention relates to a fire sign detection system for a power facility, the system performing a comprehensive evaluation using thermal information resulting from an electric arc occurring in a power cable as well as information such as temperature, humidity, and luminance inside the power facility to detect signs of a fire in advance to prompt an inspection. In addition, the system is easy to install and enables comprehensive fire prediction and determination in the power facility, along with accurate, error-free diagnosis.

Description

Fire detection system for functional power facilities

[0001] The present invention relates to a fire sign detection system for power facilities, and more specifically, to a functional fire sign detection system for power facilities that detects fire signs in advance to induce inspection, is easy to install, and enables comprehensive fire prediction and judgment of power facilities.

[0002] Due to the rapid development of industry in recent years, there has been a trend toward larger capacities in various industrial sites, including ultra-high voltage, high current, and large-scale heat supply systems. Consequently, significant efforts are being made to enhance the stability and reliability of energy and heat supply systems to provide high-quality energy and heat. In particular, more advanced scientific equipment is required for the stable operation of such large-capacity facilities. For these large-capacity heat supply systems and high-voltage, high-current transmission and distribution facilities, sensors or measuring instruments must be installed directly on the equipment.

[0003]

[0004] Generally, the installation of sensor modules is essential for some equipment included in large-capacity power facilities, such as circuit breakers, transformers, generators, and power line connections, and it is necessary to protect large-capacity power facilities from abnormal situations such as overheating, overvibration, and overcurrent by detecting temperature, vibration, or current through these sensor modules.

[0005] In conventional sensor modules, if even minute resistance occurs in the flow of energy transmitted due to vibration, deterioration, or piping abnormalities in equipment at high voltage, high current, or large capacity energy transmission sites, heat generation and vibration occur, causing abnormalities in equipment designed to withstand normal energy transmission, leading to accidents such as melting, arc discharge, short circuit, and ground fault, and ultimately resulting in material breakdown, which can cause sudden secondary damage due to the interruption of the energy source supplied by the equipment, and the sensing module may not operate normally, resulting in erroneous sensing information.

[0006]

[0007] In the current era, there is a demand for electrical safety and electrical disaster prevention systems suitable for user facility environments in U-city environments utilizing newly implemented ubiquitous technology, advanced information and communication technology, and spatial utilization technology.

[0008] While conventional switchboards and low-voltage distribution panels were manual, there has recently been a trend toward evolving systems that incorporate electronic controllers to measure power quality and quantity and transmit the data digitally. However, existing distribution panels lacked critical functions for measuring and transmitting electrical safety hazards, making them insufficient for direct application to the U-city system, which aims to improve convenience and safety in daily life through the integration of IT technology.

[0009] Typically, the main causes of electrical fires among electrical disasters are short circuits, overcurrents, arcs, and leakage currents. In addition, the surrounding environment of the user's facilities (waterlogging, gas, temperature, poor connection of home outlets) is also a major cause.

[0010] In particular, unannounced power outages and electrical accidents frequently occur in existing switchgear due to internal component failures and insulation degradation. This is because existing switchgear completely lacked measures to detect arcs and partial discharges, which are necessary to prevent power outages and accidents in advance.

[0011] In addition, household distribution panels only cut off the power supply by operating internal circuit breakers in the event of a short circuit or overload, but there is almost no equipment to provide information regarding the safety status of the distribution panel itself, gas information caused by overload or overheating in the circuit breaker connections or wiring inside the distribution panel, connection failures installed in all buildings such as houses, apartments, commercial buildings, and office buildings, and power consumption, so the actual function to prevent fire accidents in advance is lacking.

[0012]

[0013] Regarding systems for monitoring power facilities, numerous prior art documents have been disclosed and registered in addition to Korean Patent Publication No. 10-2012-0137623.

[0014]

[0015] The aforementioned prior art is characterized by comprising, in a power facility monitoring system, a data acquisition agent distributed adjacent to the power facility that detects, stores, and transmits events occurring according to the state of the power facility; a monitoring agent that recognizes the state of the power facility through events transmitted from the data acquisition agent, analyzes the recognized state of the power facility, and displays it in real time through a GUI; a server agent that communicates with a plurality of agents and transmits events generated by each agent to related agents to perform data relay between each agent; and a control agent that corrects power facility analysis data for each agent transmitted from the server agent and applies it to the operation of the power facility.

[0016]

[0017] However, conventional systems for diagnosing and monitoring power equipment such as generators, transformers, and GIS (Gas Insulated Switchgear), including the aforementioned prior art, have separate data measurement means and servers for each power equipment, that is, each individual system is independently configured such as a generator vibration diagnosis system, a generator turn-short circuit monitoring system, a generator partial discharge measurement system, a transformer ultrasonic diagnosis system, and a GIS UHF partial discharge measurement system, and servers for these are configured individually.

[0018] Therefore, there was a problem of increasing overall installation and operating costs in the operation of power facilities, and there was a limitation in that acquired data could only be analyzed through software installed on each server.

[0019]

[0020] In this regard, the applicant has provided registered patent No. 10-2132355 (fire sign detection system for power facilities, hereinafter referred to as prior art) to solve the above-mentioned problem.

[0021] The present invention aims to provide a fire sign detection system for functional power equipment that further improves upon the aforementioned prior art, thereby preventing fires by inducing inspections through the detection of fire signs in advance by attaching it to fire-vulnerable parts, and also enables low-power operation while reducing installation costs by being easy to install in a clip form and manufactured in an ultra-compact size.

[0022]

[0023] In addition, power facility fire detection systems of the prior art and prior art determine fire detection through changes according to temperature,

[0024] The present invention is a further improved version of this, and aims to provide a fire sign detection system for power equipment that can make accurate and error-free diagnoses by not only utilizing thermal information resulting from arc generation in power cables but also comprehensively judging temperature, humidity, and illuminance information inside the power equipment to diagnose fire signs.

[0025]

[0026] The present invention further improves upon the prior art to increase the contact density and elasticity with the bimetal and further enhance the heat transfer efficiency generated in the power cable. The purpose of the invention is to provide a fire indication detection system for a functional power facility that performs the function of rapidly transferring heat generated in the power cable to the bimetal by providing a thermally conductive buffer on the contact surface of the bimetal to increase the contact density and elasticity with the power cable.

[0027] In order to solve the above-mentioned objectives and requirements, the present invention,

[0028] The system is configured to include: a plurality of arc detection units, each coupled to a plurality of power cables in the power facility and detecting resistance heat generated by arc occurrence and transmitting it externally via wireless communication; a transmission terminal configured in the power facility to receive arc detection signals detected by each arc detection unit and transmit them externally; a repeater that receives and amplifies arc detection signals from the transmission terminal to overcome radio shadow areas and extend and expand the transmission distance; a collector that receives arc detection signals from the repeater and collects arc information data generated in the power facility; and a management server that receives, stores, and analyzes data regarding arc information of the power facility collected from the collector. The arc detection unit comprises a battery that supplies power; a wireless communication unit that operates by receiving power from the battery and transmits the detected arc information externally via wireless communication; a bimetal that detects resistance heat of the power cable due to arc occurrence in the power cable and mechanically turns on or off to selectively connect the battery and the wireless communication unit; a light-emitting unit that lights up and emits light when the bimetal operates and transmits arc information via the wireless communication unit; and a first unit that houses the light-emitting unit, the wireless communication unit, and the battery. The present invention aims to provide a fire sign detection system for a functional power facility comprising: a storage case; a second storage case connected to the first storage case and storing the bimetal; a connecting part configured on the side of the second storage case and connected to the power cable; a track switch configured in the internal storage space of the first storage case and driven by external operation to perform periodic communication checks between a transmitter and a receiver; and a track switch operating hole configured on the surface of the first storage case for external operation of the track switch.

[0029]

[0030] In addition, the present invention provides a fire sign detection system for a functional power facility, characterized in that the arc detection receiver (300) described above includes a temperature sensor unit (310), a humidity sensor unit (320), and an illuminance sensor unit (330), and performs the function of detecting the temperature, humidity, smoke generation, and illuminance inside the power facility and transmitting the information to a management server (700).

[0031]

[0032] In addition, the present invention has the above-mentioned management server (700) equipped with a fire prediction judgment unit (800), and

[0033] The above-described fire prediction judgment unit (800) is configured to include a fire detection judgment unit (810) and a fire warning unit (820), thereby providing a fire sign detection system for a functional power facility.

[0034]

[0035] In addition, the present invention provides a fire sign detection system for a functional power facility, characterized in that the arc detection transmitter and the arc detection receiver are configured as separate or integrated units.

[0036] In addition, the present invention provides a fire sign detection system for a functional power facility characterized by the power facility being assigned a unique ID.

[0037] In addition, the present invention provides a fire sign detection system for a functional power facility, characterized in that the fastening part is fastened to the power cable in the form of a clip.

[0038] In addition, the present invention provides a fire sign detection system for a functional power facility, characterized in that the fastening part is fastened to the power cable in the form of a clamp.

[0039] In addition, the present invention provides a fire sign detection system for functional power equipment characterized by the wireless communication unit of the present invention communicating with neighboring wireless communication units using weak radio waves.

[0040] In addition, the bimetal of the present invention provides a fire sign detection system for a functional power facility, characterized by detecting resistance heat resulting from arc generation within approximately 5 cm from the generation part when an arc occurs in the power cable.

[0041] In addition, the present invention provides a fire sign detection system for a functional power facility, characterized in that the first storage case of the present invention has an antenna attached thereto for transmission of the wireless communication unit.

[0042] In addition, the present invention provides a fire sign detection system for a functional power facility, characterized in that the power facility is one of a switchboard, a solar inverter, a solar junction box, a distribution board, a motor control board, an ESS, or a household electric distribution box.

[0043]

[0044] In addition, the present invention provides a fire indication detection system for functional power equipment, characterized in that the bimetal has a thermally conductive buffer attached to one surface.

[0045]

[0046] In addition, the wireless network including the transmission terminal, repeater, and collector of the present invention provides a fire sign detection system for functional power equipment characterized by having a built-in secondary battery so that it can operate even in an emergency.

[0047]

[0048] In addition, the present invention provides a fire sign detection system for a functional power facility, characterized in that the arc detection receiver has a sensor embedded therein that detects temperature, humidity, and illuminance, and periodically transmits this information to the management server via the transmission terminal.

[0049]

[0050] In addition, the present invention provides a fire sign detection system for functional power equipment, characterized in that the management server receives and analyzes a fire sign detection signal along with temperature, humidity, and illuminance, and displays an inspection message for the corresponding power equipment according to the situation.

[0051] The present invention is a further improvement of the prior art, and the fire sign detection system for functional power equipment according to the present invention not only utilizes thermal information resulting from arc generation in power cables but also comprehensively determines temperature, humidity, and illuminance information inside the power equipment to diagnose fire signs, thereby providing the effect of making an accurate and error-free diagnosis.

[0052]

[0053] The fire indication detection system for functional power equipment according to the present invention comprises a bimetal that operates by detecting resistance heat generated by an arc in a power cable. By supplying power to a wireless communication unit via a battery when an arc occurs and transmitting a detection signal externally, the battery is used only when an arc occurs, thereby providing the effect of reducing battery consumption.

[0054]

[0055] In addition, the fire sign detection system of a functional power facility according to the present invention enables low-power operation and minimizes interference with other surrounding points by utilizing weak radio waves to communicate with each other among a plurality of fire sign detection systems disposed within the power facility.

[0056]

[0057] In addition, the fire sign detection system for functional power equipment according to the present invention is attached to fire-vulnerable parts to detect fire signs in advance, thereby enabling the prevention of fire by guiding inspections.

[0058]

[0059] In addition, the fire sign detection system for functional power equipment according to the present invention can be installed in the form of a clip on the power cable in a fire-vulnerable part, making installation easy without turning off the power or cutting the power cable, and can reduce installation costs by being manufactured in an ultra-compact size.

[0060]

[0061] In addition, since the fire sign detection system for functional power facilities according to the present invention is easy to install on power cables, it can be installed in existing or newly constructed power facilities to more easily detect fires in advance and induce inspection.

[0062] FIG. 1 is a schematic diagram illustrating a fire sign detection system for functional power equipment according to the present invention.

[0063] FIG. 2 is an exploded configuration diagram of a fire sign detection system for a functional power facility according to the present invention.

[0064] FIG. 3 is a perspective view schematically showing an arc detection unit according to the present invention.

[0065] FIG. 4a is a perspective view schematically showing the internal configuration of the arc detection unit according to the present invention.

[0066] FIG. 4b is an additional configuration diagram of the thermally conductive buffering section and current information providing section of the arc detection unit according to the present invention.

[0067] FIG. 4c is a detailed configuration diagram of the current information providing unit of the arc detection unit according to the present invention.

[0068] FIG. 5 is a drawing showing a GIS-based Web UI to which the fire sign detection system for functional power facilities according to the present invention is applied.

[0069] FIG. 6 is a configuration diagram of an arc detection receiver of a fire sign detection system for a functional power facility according to the present invention.

[0070] FIG. 7a is a configuration diagram of the management server and fire prediction judgment unit of the fire sign detection system for functional power equipment according to the present invention.

[0071] FIG. 7b is a detailed configuration diagram of the fire prediction judgment unit of the management server of the fire sign detection system for a functional power facility according to the present invention.

[0072]

[0073] FIG. 1 is a schematic diagram for explaining a fire sign detection system for power equipment according to the present invention, FIG. 2 is a schematic diagram of the fire sign detection system for power equipment of FIG. 1, FIG. 3 is a schematic perspective view of the arc detection unit of FIG. 1, and FIG. 4a is a schematic perspective view of the internal configuration of the arc detection unit of FIG. 3.

[0074]

[0075] As illustrated in FIGS. 1 to 4a, the fire detection system for power equipment according to the present invention comprises: a plurality of arc detection units (200) connected to a power cable (100) of power equipment (1000) and detecting resistance heat around the power cable (100) generated by an arc and transmitting it to the outside via wireless communication; a transmission terminal (400) coupled to one side of the power equipment (1000) and receiving an arc detection signal from the plurality of arc detection units (200) and transmitting it to the outside; a repeater (500) that receives an arc detection signal from the transmission terminal (400), amplifies it to overcome radio wave blind spots, and extends and expands the transmission distance; a collector (600) that receives an arc detection signal from the repeater (500) and collects arc information data generated in the power equipment (1000); and a management server (700) that receives, stores, and analyzes data regarding the arc information of the power equipment (100) collected from the collector (600).

[0076]

[0077] The power equipment according to the present invention is configured to include a distribution panel that supplies electricity to the equipment, and the equipment includes a generator, a transformer, a GIS (Gas Insulated Switchgear), an electric motor, etc., and the power equipment is a concept that includes a device or means that includes or combines controlling, supplying, or using power.

[0078]

[0079] At this time, the arc detection unit (200) is attached to a part of the power cable (100) that is vulnerable to fire by means of a clip, clamp, or adhesive, and a plurality of arc detection units (200) are installed inside the power equipment to detect arcs.

[0080]

[0081] Additionally, the arc detection unit (200) includes a wireless communication unit (220), wherein the wireless communication unit (220) comprises N arc detection transmitters that detect resistance heat caused by arc generation and transmit a fire sign abnormality signal via weak radio waves, and an arc detection receiver (300) that communicates with the arc detection transmitters in an N:1 ratio, receives the fire sign detection signal when it occurs, and transmits it to the transmission terminal (400) in an external network.

[0082]

[0083] That is, the arc detection unit (200) is configured to include a wireless communication unit (220), wherein the wireless communication unit (220) is configured to include N arc detection transmitters that detect resistance heat resulting from arc generation and transmit a fire sign abnormal signal via weak radio waves, and the arc detection receiver (300) communicates with the arc detection transmitters in an N:1 ratio and performs the function of receiving the fire sign detection signal when it occurs and transmitting it to the transmission terminal (400) in an external network.

[0084]

[0085] A fire sign detection signal received through the arc detection receiver (300) is transmitted to an external management server (700) through the transmission terminal (400), and the management server (700) determines whether or not it is a fire through analysis and sends an inspection message for the corresponding power equipment (1000) depending on the situation.

[0086]

[0087] Meanwhile, the arc detection receiver (300) has internal temperature and humidity sensors and an illuminance sensor, and periodically transmits temperature, humidity, and / or illuminance information inside the power equipment (1000) to an external management server (700), and the management server (700) can analyze the fire more quickly by comparing it with a reference value. The arc detection receiver (300) may also be equipped with a function to detect odors.

[0088]

[0089] In the case of the prior art, the arc detection receiver (300) detects only the resistance heat resulting from the arc generation of the arc detection unit (200) and provides only a weak signal therefor, thereby determining whether there is a sign of fire, and thus has the problem of not being able to accurately determine whether a fire has occurred inside the power equipment or an error in judgment occurs.

[0090]

[0091] The present invention solves the above-mentioned problem and performs the function of more accurately determining whether a fire has occurred in power equipment by using information sensed inside the arc detection receiver (300), such as temperature, humidity, and illuminance.

[0092]

[0093] The arc detection receiver (300) of the present invention includes a temperature sensor unit (310), a humidity sensor unit (320), and an illuminance sensor unit (330), and performs the function of detecting the temperature, humidity, whether smoke is generated, illuminance, etc. inside the power equipment and transmitting the information to a management server (700).

[0094]

[0095] As shown in FIG. 6, the arc detection receiver (300) described above includes a temperature sensor unit (310), a humidity sensor unit (320), and an illuminance sensor unit (330).

[0096]

[0097] The temperature sensor unit (310) of the present invention refers to a device or means that performs the function of measuring the temperature inside the power facility.

[0098]

[0099] The humidity sensor unit (320) of the present invention refers to a device or means that performs the function of measuring humidity inside a power facility.

[0100]

[0101] The illuminance sensor unit (330) of the present invention refers to a device or means that performs the function of detecting illuminance inside a power facility.

[0102]

[0103] Accordingly, the above-described arc detection receiver (300) transmits information regarding the resistance heat detected by the arc detection unit (200) mounted on the power cable (100) and information regarding the temperature, humidity, illuminance, etc. inside the power equipment to the management server (700) to determine whether there are signs of fire in the power equipment.

[0104]

[0105] The management server (700) of the present invention is equipped with a fire prediction judgment unit (800) and determines whether there are signs of fire in the power equipment by using information that detects resistance heat due to arc generation transmitted from the arc detection receiver (300) and information such as the temperature, humidity, and illuminance inside the power equipment.

[0106]

[0107] The fire prediction judgment unit (800) of the present invention is configured to include a fire detection judgment unit (810) and a fire warning unit (820).

[0108]

[0109] As seen in FIG. 7b, the fire prediction judgment unit (800) is configured to include a fire detection judgment unit (810) and a fire warning unit (820).

[0110]

[0111] The fire detection judgment unit (810) of the present invention performs the function of generating primary fire warning information when the temperature deviates from the reference temperature range using detection information regarding resistance heat due to arc generation transmitted from the arc detection unit (200), and generating secondary fire warning information by identifying detection information regarding the temperature, humidity, smoke generation, illuminance, etc. inside the power equipment provided by the arc detection receiver (300), and transmitting it to the fire warning unit (820).

[0112]

[0113] The present invention performs the function of determining that a fire has occurred when a temperature judgment unit (811) is added to a fire detection judgment unit (810) and the temperature (C) inside the power equipment exceeds the range of a reference temperature (BT0) and persists for a certain period of time (T0) or longer.

[0114]

[0115] In other words, the interior of the power equipment remains within the normal temperature range when there are no abnormal signs, but if the power equipment overheats or a fire occurs, the temperature inside the power equipment rises.

[0116]

[0117] In this way, the occurrence of a fire in the power equipment is determined by using the temperature information provided by the temperature sensor unit (310).

[0118]

[0119] Generally, the temperature of the power equipment is low in winter and high in summer, so the temperature inside the power equipment measured by the temperature sensor (310) is different, and the temperature of the power cable (100) itself is also different depending on the season.

[0120]

[0121] Accordingly, the present invention performs the function of modifying the reference temperature range when the temperature inside the power facility rises above a certain temperature by applying the temperature correction unit (811-1) to the temperature judgment unit (811) described above based on the temperature information provided by date and time.

[0122]

[0123] The temperature information provided by date and time as described above can be received by the management server (700) connected to a communication such as the internet, so that the temperature of that day can be provided by time.

[0124]

[0125] That is, when the reference temperature range (BT0) is set, if the average temperature of a specific day is RT, the reference temperature range (BT) reset through the correction providing unit (611) is reset as follows.

[0126]

[0127] The reset reference temperature range (BT) = BT(0) + α(RT), and

[0128] Here, α is set as a constant and is defined as any number from 0 to 1.

[0129]

[0130] For example, even if the reference temperature range (BT0) is set to 50 degrees and the system is configured to determine the possibility of a fire occurring when the temperature exceeds 50 degrees and persists for a certain period of time,

[0131] If the average temperature (RT) on a specific day is 40 degrees and α is set to 0.4, as follows:

[0132] Reset reference temperature range (BT) = 50 degrees + 0.4 (40 degrees) = 66 degrees

[0133] It is reset to 66 degrees and the function of determining the possibility of a fire is performed only when the temperature is maintained for a certain period of time or longer.

[0134]

[0135] The present invention performs the function of determining whether a fire has occurred in a power facility through humidity information provided by a humidity sensor unit (320) by adding a humidity judgment unit (812) to the fire detection judgment unit (810) described above.

[0136]

[0137] When resistance heat caused by arc generation in a power cable (100) inside a power facility continues for a certain period of time or longer, the relative humidity around the power cable (100) decreases relatively.

[0138]

[0139] That is, when the power equipment is operating safely, the relative humidity (RH0) and the resistance heat caused by arc generation continue for a certain period of time or longer, the relative humidity (RH) around the power cable (100) decreases, and thus, when the rate of change (C) of relative humidity exceeds the standard range for a certain period of time or longer, it can be determined that a fire has occurred.

[0140]

[0141] Therefore, the rate of change of relative humidity (C) is defined as = (relative humidity when the power equipment is operating safely (RH0) - relative humidity around the power cable (100) (RH)) / (relative humidity when the power equipment is operating safely (RH0)).

[0142]

[0143] In this case, if the rate of change C of relative humidity exceeds CO, which is the set standard range, and continues for longer than the standard set time T0, it may be determined that a fire has occurred.

[0144] That is, C0 = 0.3, T0 = 1 hour, etc. can be set, and if these conditions are satisfied, it is determined that a fire has occurred.

[0145]

[0146] The present invention performs the function of detecting whether a fire has occurred in a power facility by adding an illuminance determination unit (813) to the above-mentioned fire detection judgment unit (810) and using illuminance information provided by the illuminance sensor unit (330).

[0147]

[0148] When a fire occurs in a power cable (100) inside a power facility, smoke may be generated or soot may be generated from a polymer material cable, so a change in the illuminance inside the power facility may occur, and the function of detecting whether a fire has occurred in the power facility is performed through the degree of illuminance.

[0149]

[0150] The above-mentioned illuminance detection unit (813) performs the function of determining that a fire has occurred when the illuminance provided by the illuminance sensor unit (330) is greater than or equal to the illuminance difference rate (RI) between the illuminance (I0) when no fire has occurred and the current illuminance (I).

[0151]

[0152] Therefore, the illuminance difference rate (RI) is defined as = (illuminance in the absence of fire (I0) - current illuminance (I)) / (illuminance in the absence of fire (I0)).

[0153]

[0154] In this case, if the illuminance difference rate (RI) exceeds the set standard range RIO and continues for longer than the standard set time T0, it may be determined that a fire has occurred.

[0155] That is, RI0 = 0.2, T0 = 0.5 hours, etc. can be set, and if these conditions are met, it can be determined that a fire has occurred.

[0156]

[0157] The present invention performs the function of the above-described fire detection judgment unit (810) having a fire comprehensive judgment unit (814) added to it, comprehensively judging the fire occurrence possibility information provided by the above-described temperature judgment unit (811), humidity judgment unit (812), and illuminance determination unit (813), generating secondary fire warning information, and transmitting it to the fire warning unit (820).

[0158]

[0159] As an example of the comprehensive judgment algorithm of the fire comprehensive judgment unit (814) described above, if the fire occurrence condition of the temperature judgment unit (811) is satisfied and one or more fire occurrence conditions of the humidity judgment unit (812) or the illuminance detection unit (813) are satisfied, the function of generating secondary fire warning information and transmitting it to the fire warning unit (820) can be performed.

[0160]

[0161] The above-mentioned fire warning unit (820) performs the function of transmitting primary fire warning information or / and secondary fire warning information provided by the above-mentioned fire detection judgment unit (810) to the manager's terminal (710) to notify whether there is a sign of fire in the power facility.

[0162]

[0163] Although it is described that the arc detection transmitter is configured inside the arc detection unit (200) and the arc detection receiver (300) is configured separately from the arc detection unit (200), this is not limited thereto, and an integrated transmitter and receiver may be configured within the arc detection unit (200) to enable arc detection transmission and reception.

[0164]

[0165] Meanwhile, the above-mentioned power equipment (1000) is configured such that a control panel is built inside a main body on a metal enclosure, which includes a low-voltage and high-voltage distribution board or distribution board, a motor control board, a solar inverter (power converter), a solar junction box, an ESS, etc., and has various electrical control means, power cables connecting them, and switches and measuring instruments for controlling the control means. Meanwhile, the above-mentioned distribution board includes a household electrical distribution box.

[0166] The transmission terminal (400) is configured to be attached to at least one outer or inner surface of the power facility (1000).

[0167] The above repeater (500) can wirelessly connect the transmission terminal (400) to the collector (600) respectively. For example, at least one repeater (500) may be located between the transmission terminal (400) and the collector (600). The transmission terminal (400) can transmit the corresponding metering data through a predetermined path. The collector (600) can receive the data transmission path of the transmission terminal (400). For example, the arc information data may include the data transmission path of the corresponding transmission terminal (400).

[0168] The above repeater (500) is necessary to extend the transmission distance to a wireless network and improve the communication environment.

[0169] A transmission terminal (400) is installed by connecting it to the meter of each consumer within a cell with a radius of about 1 km centered on the above collector (600), and if communication with the above collector (600) is good, the transmission terminal (400) is configured to directly connect to the collector (600), and if not, a relay (500) is installed by selecting a location appropriate for the radio wave environment and the network is configured through the installed relay (500).

[0170] The collector (600) can receive arc information data from the transmission terminal (400). The arc information data may include data collected by the transmission terminal (300). The transmission terminal (400) may include a unique number. For example, each transmission terminal (300) may be assigned a unique number based on its location.

[0171] The collector (600) can receive location information of each transmission terminal (400) along with arc information data of each transmission terminal (400). For example, the arc information data may include a unique number of the transmission terminal (400).

[0172] When the collector (600) receives arc information data received from the transmission terminal (400), it may use various types of wireless networks including private network communication in the UHF band (e.g., GSM (Global System for Mobile Communications), EDGE (Enhanced Data Rates for GSM Evolution), GPRS (General Packet Radio Service), CDMA (Code Division Multiple Access), Time Division-CDMA (TD-CDMA), UMTS (Universal Mobile Telecommunications System), LTE (Long Term Evolution), or other cellular networks), local area networks (LAN), and various wired networks such as RS232, RS485, and D-PLC.

[0173] The above collector (600) is capable of UHF and communication type interfaces and has an Ethernet interface built in.

[0174] Meanwhile, the wireless network including the transmission terminal (400), repeater (500), and collector (600) has a secondary battery (not shown) built in so that it can operate even in an emergency.

[0175] The above management server (700) is configured to receive arc information data from the above collector (600), manage it, and transmit various command signals.

[0176] Each component of the fire sign detection system for power facilities according to the present invention is designed with an ultra-low power hardware design to enable ultra-low power data communication that allows for long-term normal operation by battery driving, and is designed with a low-power MAC protocol and a low-power metering operation structure for low-power control and efficient low-power data communication.

[0177]

[0178] The arc detection unit (200) comprises a battery (210) that supplies power, a wireless communication unit (220) that operates by receiving power from the battery (210) and transmits the detected arc information to the outside via wireless communication, a bimetal (230) that detects resistance heat of the power cable (100) due to arc generation in the power cable (100) and is mechanically turned on or off to selectively connect the battery (210) and the wireless communication unit (220), a light-emitting unit (240) that lights up and emits light when the bimetal operates and sends arc information through the wireless communication unit (220), a first storage case (250) that houses the light-emitting unit (240), the wireless communication unit (220), and the battery (210), a second storage case (260) that is connected to the first storage case (250) and houses the bimetal (230), and a component configured on the side of the second storage case (260). It is configured to include a fastening part (270) that is fastened to a power cable (100), a track switch (280) configured in the internal storage space of the first storage case (250) and driven by external operation to perform periodic communication checks between a transmitter and a receiver, and a track switch operating hole (290) configured on the surface of the first storage case (250) for external operation of the track switch (280).

[0179]

[0180] Here, the connecting part (270) is in the form of a clamp and is opened by artificial operation from one side, and when the operation is stopped, it is closed so that it can be freely attached to and detached from a desired part of the power cable (100).

[0181]

[0182] Therefore, the above-mentioned connecting part (270) is manufactured in the form of a clip so that it can be easily installed at the desired location of the power cable (100) without turning off the power or cutting the power cable (100).

[0183]

[0184] In addition, the above-mentioned connecting part (270) can be easily attached to and detached from the power cable (100) using an adhesive that is detachable from the power cable (100), and provides ease of attachment such that, if necessary, the bimetal (230) can be attached in a structure that allows for good heat transfer from the power cable (100).

[0185]

[0186] The above-mentioned detachable adhesive is a polymer resin type adhesive, and it is very effective to use an adhesive composed of 10 to 50 parts by weight of methacrylic anhydride, 10 to 20 parts by weight of ethyl acrylic acid, 0.1 to 2 parts by weight of dibutyltin dilaurate, 1 to 10 parts by weight of isopropyl isostearate, and 1 to 5 parts by weight of tetramethylammonium, mixed with 100 parts by weight of polyolefin resin.

[0187]

[0188] The above-mentioned polymer resin adhesive contains an adhesion-enhancing additive that performs the function of significantly enhancing adhesive strength and adhesion power.

[0189]

[0190] It is preferable to mix 0.5 to 2 parts by weight of the above-mentioned adhesion reinforcing additive based on 100 parts by weight of the polyolefin resin.

[0191]

[0192] The above-mentioned adhesion-strengthening additive refers to a composition formed by mixing 5 to 20 parts by weight of dipropylene glycol, 1 to 10 parts by weight of isoprene, and 0.5 to 50 parts by weight of methylene diisocyanate with 100 parts by weight of polyether polyol modified glycerin.

[0193]

[0194] The present invention provides a polymer resin-type adhesive containing functional additives that prevent the weakening of adhesive strength due to continuous thermal stress and ultraviolet rays, thereby significantly increasing the durability of the adhesive strength.

[0195]

[0196] It is preferable to mix 0.1 to 2 parts by weight of the above-mentioned functional additive based on 100 parts by weight of the polyolefin resin.

[0197]

[0198] The above-mentioned functional additive comprises 10 to 30 parts by weight of chloropolypropylene, 10 to 30 parts by weight of acrylate, 10 to 30 parts by weight of polyester polyol, 10 to 30 parts by weight of ethyl acrylic acid, 5 to 20 parts by weight of maleic anhydride, and 1 to 10 parts by weight of ethanediol, in addition to 100 parts by weight of ethylene glycol.

[0199]

[0200] The materials of the first storage case (250) and the second storage case (260) of the arc detection unit (200) described above can be varied, and preferably, they are made of a polymer resin that is resistant to heat, has good durability so that no damage occurs, and is resistant to deterioration due to long-term use.

[0201]

[0202] The present invention is characterized in that the first storage case (250) and the second storage case (260) of the arc detection unit (200) described above are made of a polymer resin that withstands high temperatures well, has high strength, and withstands weathering caused by temperature changes inside the power equipment well.

[0203]

[0204] The above-mentioned polymer resin may be a polymer resin using polyvinyl chloride, polyethylene, polypropylene, polystyrene, or polyester alone or a mixture of two or more types.

[0205]

[0206] It is preferable to use the above-mentioned polymer resin composed of 10 to 100 parts by weight of polyester in 100 parts by weight of polyethylene.

[0207]

[0208] As the material of the above-mentioned case, the polymer resin may include functional additives to significantly enhance durability and cold resistance.

[0209]

[0210] In the present invention, it is preferable to mix 1 to 10 parts by weight of a functional additive with 100 parts by weight of the above-mentioned polymer resin to significantly improve durability and cold resistance.

[0211]

[0212] The above-mentioned functional additive is effective when composed by mixing 10 to 20 parts by weight of silicon oxide, 1 to 5 parts by weight of aminoethyl silane, 1 to 3 parts by weight of aluminum hydroxide, and 0.5 to 1 part by weight of zinc oxide with 100 parts by weight of calcium carbonate.

[0213]

[0214] In this invention, a strength reinforcing agent is added to the above-mentioned polymer resin to significantly increase the strength of the case.

[0215]

[0216] In the present invention, it is preferable that 0.1 to 5 parts by weight of a strength reinforcing agent be mixed with 100 parts by weight of a polymer resin.

[0217]

[0218] The above-mentioned strength reinforcing agent refers to a composition formed by mixing 50 to 200 parts by weight of methyl methacrylate, 5 to 20 parts by weight of methyl acrylic acid, and 10 to 30 parts by weight of dimethylene glycol with 100 parts by weight of acrylonitrile.

[0219]

[0220] The present invention includes a heat-strengthening composition in the above-described polymer resin to perform the function of preventing breakage and damage to the above-described case due to high temperature and heat.

[0221]

[0222] It is very effective to mix 0.5 to 2 parts by weight of the above-mentioned heat-strengthening composition based on 100 parts by weight of polymer resin.

[0223]

[0224] The above-mentioned heat-strengthening composition refers to a composition formed by mixing 10 to 30 parts by weight of silicon oxide, 5 to 20 parts by weight of aluminum oxide (Al2O3), 1 to 10 parts by weight of alginic acid, 5 to 30 parts by weight of carboxymethyl cellulose, and 10 to 60 parts by weight of ammonium phosphate with 100 parts by weight of polylactic acid (PLA).

[0225]

[0226] The present invention may include a natural composition in the above-mentioned polymer resin, thereby enhancing the eco-friendliness of the polymer resin and significantly increasing the acid and alkali resistance of the case.

[0227]

[0228] It is preferable that the above-mentioned natural composition contains 0.01 to 0.5 parts by weight based on 100 parts by weight of polymer resin.

[0229]

[0230] The above-mentioned natural composition refers to a composition extracted by mixing 10 to 50 parts by weight of longan fruit, 10 to 30 parts by weight of *Jeolgukdae*, 80 to 120 parts by weight of *Yamyak*, 10 to 30 parts by weight of *Gallugen* root, and 50 to 80 parts by weight of *Sokdan* with 100 parts by weight of *Cypripedium macranthum*.

[0231]

[0232] The present invention provides a high effect in preventing the problem of the polymer resin, which is the material of the case, from oxidizing and weakening by adding a functional reinforcing additive to the aforementioned polymer resin.

[0233]

[0234] It is preferable to mix 0.001 to 0.005 parts by weight of the above-mentioned functional enhancing additive based on 100 parts by weight of the polymer resin.

[0235]

[0236] The above-mentioned functional enhancing additive refers to a composition extracted by mixing 80 to 120 parts by weight of Fritillaria, 10 to 30 parts by weight of fermented rice, and 80 to 120 parts by weight of Panax notoginseng with 100 parts by weight of Cuscuta japonica.

[0237]

[0238] The above-mentioned natural composition and functional enhancement additive can be extracted by adding 1,000 parts by weight of 75-85% [mass%] ethanol to 100 parts by weight of the above-mentioned mixed raw material, refluxing for 2-4 hours, and concentrating the filtrate under reduced pressure using a rotary evaporator.

[0239] Such an extract can be extracted in the form of 5 to 25 parts by weight based on 100 parts by weight of the mixed raw materials, and it is desirable to add this extract in the form of powder.

[0240]

[0241] Meanwhile, the first and second storage cases (250, 260) are joined vertically, and the power cable (100) passes through the connection part (270), so that the power cable (100) does not protrude to the side of the first and second storage cases (250, 260).

[0242]

[0243] The above bimetal (230) is turned ON when the temperature of the power cable (100) reaches a reference temperature due to arc generation, and supplies power from the battery (210) to the wireless communication unit (220) to wirelessly transmit a detection signal of arc generation through the wireless communication unit (220).

[0244]

[0245] The above bimetal (230) maintains an OFF state when the temperature of the power cable (100) is below a reference temperature, thereby blocking the supply of power from the battery (210) to the wireless communication unit (220), and turns ON when the temperature is above the reference temperature, thereby supplying power from the battery (210) to the wireless communication unit (220).

[0246]

[0247] In the prior art, the arc detection unit (200) performs the function of detecting when an arc occurs in the power cable (100) and transmitting a detection signal wirelessly, thereby determining whether a fire has occurred. The present invention further improves this by accurately measuring the temperature of the power cable (100) when an arc occurs, thereby performing the function of providing additional data for determining whether a fire has occurred inside the power facility.

[0248]

[0249] As shown in FIG. 4b, the present invention further improves upon the aforementioned prior art by providing a current information providing unit (232) that provides current information to an arc detection unit (200), and when the battery is activated by the bimetal (230), the current information providing unit (232) is activated to perform the function of providing current information (IF) to a wireless communication unit (220).

[0250]

[0251] As seen in FIG. 4c, the current information providing unit (232) is connected to the battery (210) and has a resistance unit (232-1) inside. When the battery voltage (V0) is constant, the resistance value (R) increases proportionally when the temperature (T) rises in the resistance unit, and the current (I) changes accordingly. A current measurement sensor is provided in the resistance unit according to the temperature change of the power cable (100), and the accurate temperature (T) of the power cable (100) can be measured through the measured current information (IF).

[0252]

[0253] The above-mentioned current information (IF) is provided to an arc detection receiver (300) through a wireless communication unit (220), and the arc detection receiver (300) transmits it to a management server (700), and the fire prediction judgment unit (800) of the management server (700) determines whether a fire has occurred.

[0254]

[0255] The fire detection judgment unit (810) of the fire prediction judgment unit (800) of the present invention determines the temperature of the power cable (100) by passing the current information (IF) of the resistance unit according to the temperature (T) of the power cable (100) through a calibration line, or by using the current information (IF) of the current information providing unit (232) transmitted from the arc detection receiver (300) through the calibration formula (1) below, which is pre-set.

[0256]

[0257] That is, the temperature (T) of the power cable (100) = T0+[(V0 / I-R0) / α] ----calibration formula (1)

[0258] Here, T0 ; reference temperature (when no arc occurs),

[0259] V0: Battery voltage

[0260] I ; Current Information (IF) Current Value

[0261] R0: Reference resistance value of the resistor

[0262] α: Resistance constant depending on temperature (i.e., derived from empirical or empirical formulas as R=R0 + α(T-T0))

[0263]

[0264] It performs the function of making a strong judgment that a fire has occurred in the power equipment when the temperature change (△T) exceeds a set range during a reference time (e.g., between 10 and 20 minutes) through the temperature information of the power cable (100) as described above.

[0265]

[0266] Meanwhile, the bimetal (230) of the prior art has a cushioning rubber attached to one surface. The cushioning rubber is formed in a molding structure to prevent damage to the bimetal (230) and to increase the contact density.

[0267]

[0268] The present invention further improves upon the prior art described above by providing a thermally conductive buffer (231) on the contact surface of the bimetal to increase the contact density and elasticity with the bimetal and to further increase the heat transfer efficiency generated in the power cable (100), thereby performing the function of rapidly transferring heat generated in the power cable (100) to the bimetal (230).

[0269]

[0270] As shown in FIG. 4b, the thermally conductive buffer (231) is characterized by being made of a thermally conductive material in which conductive particles are added to a polymer material, thereby increasing the contact density and elasticity with the power cable (100) and significantly increasing the thermal efficiency, thereby enabling a more effective fire detection effect.

[0271]

[0272] The above-mentioned thermally conductive material is preferably composed of 5 to 20 parts by weight of a conductive material mixed with 100 parts by weight of a polymer material composed of a mixture of polyamide, silicone, diethylene glycol, ammonium sulfate, magnesium sulfate, and calcium stearate.

[0273]

[0274] Preferably, the above-mentioned polymer material is composed by mixing 10 to 50 parts by weight of silicon, 5 to 20 parts by weight of diethylene glycol, 5 to 10 parts by weight of ammonium sulfate, 1 to 5 parts by weight of magnesium sulfate, and 1 to 5 parts by weight of calcium stearate with 100 parts by weight of polyamide.

[0275]

[0276] Polymer material with such a composition has high contact density and elasticity with the power cable (100), and also exhibits significantly higher heat transfer efficiency compared to other rubber materials.

[0277]

[0278] The above-mentioned conductive material is preferably composed by mixing 10 to 20 parts by weight of aluminum nitride (AlN) and 10 to 20 parts by weight of boron nitride (BN) with 100 parts by weight of aluminum oxide (Al2O3).

[0279] Such a conductive material performs the function of rapidly transferring heat generated in the power cable (100) to the bimetal (230).

[0280]

[0281] The present invention may mix functional additives into the above-mentioned polymer material to prevent oxidation by heat and enhance durability.

[0282]

[0283] The above-mentioned functional additive can be composed by mixing 0.5 to 2 parts by weight based on 100 parts by weight of polyamide.

[0284]

[0285] The above-mentioned functional additive refers to a composition formed by mixing 1 to 10 parts by weight of alginate, 5 to 30 parts by weight of carboxymethyl cellulose, 1 to 10 parts by weight of tin, 5 to 10 parts by weight of acetic acid, and 2 to 5 parts by weight of graphite with 100 parts by weight of phosphoric acid.

[0286]

[0287] In addition, an antenna (not shown) is attached to the first storage case (250) for transmission of the wireless communication unit (220).

[0288] The above-mentioned light-emitting unit (240) is composed of an LED and lights up when an arc occurs during an inspection of power equipment by an administrator or customer, making it easier to recognize the occurrence of an arc from the outside.

[0289]

[0290] The above arc detection unit (200) is installed in multiple units within a single power facility (1000), and as multiple power facilities (1000) are installed depending on the building, each power facility (1000) is assigned a unique ID (not shown). Therefore, the exact location where the arc occurred can be identified according to the ID, allowing for faster repair of the fault or extinguishing of the fire.

[0291]

[0292] The arc detection unit (200) is connected to the power cable (100) in the form of a clip, clamp, or adhesive, that is, the arc detection unit (200) is connected to the connection part of the power cable (100) and configured to detect and react to resistance heat caused by arc generation.

[0293]

[0294] Each arc detection unit (200) within the above power facility (1000) communicates with each other using weak radio waves, and the arc detection unit (200) detects the temperature resulting from the arc generation within approximately 5 cm from the generation unit when an arc occurs in the power cable (100) and responds.

[0295]

[0296] The above battery (210) enables low power consumption through the use of weak radio waves, and thus performs the function of miniaturizing the size by using a coin battery.

[0297]

[0298] In the embodiment of the present invention, the above wireless communication unit (220) uses private network communication in the UHF band. Meanwhile, the above wireless communication unit (220) can use various types of wireless networks including private network communication in the UHF band (e.g., GSM (Global System for Mobile Communications), EDGE (Enhanced Data Rates for GSM Evolution), GPRS (General Packet Radio Service), CDMA (Code Division Multiple Access), Time Division-CDMA (TD-CDMA), UMTS (Universal Mobile Telecommunications System), LTE (Long Term Evolution), or other cellular networks), local area networks (LAN), and various wired networks such as RS232, RS485, and D-PLC.

[0299]

[0300] For example, if the wireless communication unit (220) is a short-range communication network, the short-range communication network may be any one of Wireless LAN, Wi-Fi, Bluetooth, Zigbee, WFD (Wi-Fi Direct), UWB (ultra wideband), infrared communication (IrDA, infrared Data Association), BLE (Bluetooth Low Energy), and NFC (Near Field Communication).

[0301] As another example, if network data access element(s) are part of a GSM network, the network data access element(s) may include one or more of a BTS (base transceiver station), a BSC (Base Station Controller), a MSC (Mobile Switching Center), a SGSN (Serving GPRS Support Node), etc.

[0302] As another example, if the network data access element(s) are part of a LAN, the network data access element may include one or more network switches, routers, hubs, modems, etc.

[0303]

[0304] The above bimetal (230) is made by stacking and bonding two types of thin metals with different coefficients of thermal expansion, that is, different degrees of expansion and contraction depending on changes in temperature. When the temperature rises, the side with the larger coefficient of thermal expansion expands more and bends to the opposite side. Then, when the temperature drops again, it returns to its original state.

[0305]

[0306] Meanwhile, an alloy of nickel (Ni) and iron (Fe) is used as a metal that does not expand well, and for a metal that expands well, one of the following is used: an alloy of nickel, manganese, and iron; an alloy of nickel, molybdenum, and iron; or an alloy of nickel, manganese, and copper (Cu).

[0307] The above bimetal (230) can be configured to open or close a switch by utilizing its property of bending according to temperature, and the bimetal (230) itself can be used as a switch to control a circuit.

[0308]

[0309] Therefore, in the present invention, by utilizing the properties of the bimetal (230) as described above, the switch operation is made when the temperature generated by the arc in the power cable (100) rises higher than the standard, thereby preventing fire and other incidents and protecting the equipment.

[0310]

[0311] Figure 5 is a diagram showing a GIS-based Web UI with a fire sign detection system for power facilities according to the present invention applied.

[0312] As shown in FIG. 5, multiple power facilities (distribution boards) (1000) are installed within a building, and multiple arc detectors (200) are installed in fire-vulnerable parts inside the power facilities (1000) to detect signs of fire. When there are no abnormal signs, blue light is emitted to determine a normal state, and when there are signs of fire, red light is emitted so that the manager can respond more quickly.

[0313] At this time, the location, status, and temperature information of each distribution panel are displayed on the screen of the management server (700).

[0314]

[0315] The above-mentioned management server (700) is connected to a terminal (710), and the terminal (700) of the present invention is a concept that includes a terminal of a user or a terminal of an administrator using the system of the present invention.

[0316]

[0317] The above-mentioned terminal (700) is a concept that includes a conventional PC, laptop, mobile phone, tablet PC, etc.

[0318]

[0319] In addition to inducing the manager to inspect the distribution box when the 'inspection' message is displayed, the arc detection receiver (300) may transmit temperature, humidity, smoke, and illuminance data inside the power equipment (1000) to the management server (700) and compare them with reference data values ​​to display an inspection message when abnormal data is detected.

[0320]

[0321] Meanwhile, although the technical concept of the present invention has been described above together with the accompanying drawings, this is merely an illustrative explanation of preferred embodiments of the present invention and is not intended to limit the invention. Furthermore, it is evident that anyone with ordinary knowledge in the technical field to which the present invention pertains can make various modifications and imitations within the scope of the technical concept of the present invention without departing from its scope.

[0322]

[0323] The present invention is useful for industries that produce, manufacture, sell, distribute, and research equipment for detecting signs of fire in power facilities.

[0324]

[0325] In particular, the present invention is useful for industries that produce, manufacture, sell, distribute, and research systems for detecting signs of fire in functional power equipment using temperature, humidity, and illuminance information resulting from arc generation in power equipment.

Claims

1. A plurality of arc detection units (200) connected to a power cable (100) of a power facility (1000) and detecting resistance heat around the power cable (100) generated by an arc and transmitting it to the outside via wireless communication, and The above arc detection unit (200) includes a wireless communication unit (220), and The above wireless communication unit (220) comprises an arc detection transmitter and an arc detection receiver (300), and A transmission terminal (400) coupled to one side of the above power facility (1000) and receiving an arc detection signal from the plurality of arc detection units (200) and transmitting it to the outside, and A repeater (500) that receives an arc detection signal from the transmission terminal (400), amplifies it to overcome radio shadow areas, and extends and expands the transmission distance, and A collector (600) that receives an arc detection signal from the above relay (500) and collects arc information data generated in the above power facility (1000), and A fire detection system for a functional power facility, comprising a management server (700) that receives, stores, and analyzes data regarding information about the power facility (100) collected from the collector (600).

2. In Paragraph 1, A fire detection system for a functional power facility, characterized in that the above-described arc detection receiver (300) includes a temperature sensor unit (310), a humidity sensor unit (320), and an illuminance sensor unit (330), and performs the function of detecting the temperature, humidity, smoke generation, and illuminance inside the power facility and transmitting the information to a management server (700).

3. In Paragraph 1, The above-mentioned management server (700) is equipped with a fire prediction judgment unit (800), and A fire sign detection system for a functional power facility, characterized in that the above-mentioned fire prediction judgment unit (800) comprises a fire detection judgment unit (810) and a fire warning unit (820).

Images