KR101606704B1 - Distributing Panel Having Power Line Checking Device and Protective Relay Operation Sound Warning Device - Google Patents

Distributing Panel Having Power Line Checking Device and Protective Relay Operation Sound Warning Device Download PDF

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Publication number
KR101606704B1
KR101606704B1 KR1020150188757A KR20150188757A KR101606704B1 KR 101606704 B1 KR101606704 B1 KR 101606704B1 KR 1020150188757 A KR1020150188757 A KR 1020150188757A KR 20150188757 A KR20150188757 A KR 20150188757A KR 101606704 B1 KR101606704 B1 KR 101606704B1
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South Korea
Prior art keywords
temperature
housing
bus bars
current
unit
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KR1020150188757A
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Korean (ko)
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이완해
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주식회사 일산전기
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01W—METEOROLOGY
    • G01W1/00—Meteorology
    • G01W1/11—Weather houses or other ornaments for indicating humidity
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/185—Electrical failure alarms
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
    • G08C23/04—Non-electrical signal transmission systems, e.g. optical systems using light waves, e.g. infrared
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/24—Circuit arrangements for boards or switchyards
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/56—Cooling; Ventilation
    • H02J17/00—

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Emergency Management (AREA)
  • Business, Economics & Management (AREA)
  • Atmospheric Sciences (AREA)
  • Environmental Sciences (AREA)
  • Ecology (AREA)
  • Electromagnetism (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

The present invention monitors the temperature change due to deterioration of various electrical apparatuses installed in a switchboard in real time through temperature detection of a bus bar connected to an electric apparatus, notifies the manager of the temperature change, and supplies external air to the inside of the switchboard when an abnormality occurs, The present invention relates to a switchboard having a live-line display device and a protection relay-operated voice alarm device that can reduce the risk of a safety accident such as a fire. The switchboard with the live wire display device and the protection relay operating voice alarm device according to the present invention comprises an enclosure having an internal space into which an electric device and a plurality of bus bars connected to the electric device can be installed, A housing having a door installed in an enclosure; A pump connected to the housing to supply outside air to the inside of the housing and including a filter for removing dust in the air supplied to the housing; A plurality of bus bars provided in the plurality of bus bars for detecting the temperature of each of the plurality of bus bars and an electric induction phenomenon using currents flowing through the plurality of bus bars, A current detector for detecting a current flowing through each of the plurality of busbars coupled to each of the plurality of busbars using electric power generated by the electromagnetic induction power source; A plurality of bus bar temperature detection modules each having a local optical communication section for converting a detection current detected by the detection section into an optical signal and transmitting the optical signal; A main optical communication unit installed in the housing and receiving an optical signal transmitted from a local optical communication unit of each of the plurality of bus bar temperature detection modules; And determining whether the detected current exceeds a predetermined upper temperature limit value and a reference current value and if the detected temperature of each of the plurality of bus bars exceeds the upper temperature limit value, And when the detected current of the booth bar exceeding the upper limit of the temperature exceeds the reference current value, it is determined that the temperature rise of the booth bar is caused by the overcurrent and generates an alarm signal, A controller for operating the pump to supply outside air into the housing; And a main optical communication unit of each of the plurality of bus bar temperature detecting modules and a main optical communication unit of the controller are connected to the main optical communication unit of the controller, And an optical cable connected in a single-loop manner.

Figure R1020150188757

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a power line monitoring device and a protective relay device,

The present invention relates to a switchboard having a live-line display device and a protection-relay-operated voice alarm device, and more particularly, to monitoring the temperature change inside the switchboard in real time to inform the manager, And a protection relay operating voice alarm device capable of reducing the power consumption of the mobile communication terminal.

As the demand for electric power increases, the installation of power distribution system, which is a base electric power facility, is increasing in electric power consumers who receive special high voltage power such as buildings, substations and industrial sites and convert them into high voltage and low voltage necessary for customers. These faults are installed and operated in various ways, depending on the size of the used voltage, usage, location, etc., such as a high-voltage switchboard, a low-voltage switchboard, an MCC, and a distribution board.

The switchboard is an electric device that arranges and manages electric devices such as various switches, instruments, relays (relays), and transformers. A high-voltage current flows through the interior of the switchboard. The switchboard is electrically connected to various facilities through a busbar that can energize high-voltage currents.

Such a switchboard is installed and operated in various ways by high voltage switchboard, low voltage switchboard, MCC board, and distribution board depending on the size of voltage, usage, place and so on.

However, it is a reality that various types of electric equipment accidents are occurring due to the increase in installation and capacity of electric power facilities. Particularly, in the interior of a switchgear with a closed structure, thermal deterioration due to the temperature rise of electric devices, electrical deterioration due to electric field concentration, mechanical deterioration due to mechanical stress, and environmental deterioration due to time or place, Is likely to accelerate. And electrical devices where insulation deterioration occurs generate a local discharge (PD). If the local discharge is continuously operated while being left untreated and exceeds the insulation strength limit value of the electric devices, a flash over occurs, thereby causing problems such as breakage of the electric device, fire, power failure, and the like. In addition, when contact resistance increases due to screw loosening or the like at a joint portion of a current path such as a bus bar, heat may be generated and short-circuited parts or parts may melt and lead to fire.

After an incident, recovery takes a lot of time and money. Therefore, before an accident occurs, it is necessary to detect and diagnose an abnormal symptom in advance of the accident. Currently, various monitoring devices and diagnostic devices capable of monitoring and diagnosing signs such as partial discharge and temperature rise, which are insulation deterioration phenomena of electric devices, have been developed. However, research and development Is continuing.

Patent Registration No. 0775018 (Nov. 13, 2007) Patent Registration No. 1076015 (Oct. 21, 2011) Patent Registration No. 1426792 (2014. 08. 05.) Patent Registration No. 1481384 (Apr. 14, 2015)

SUMMARY OF THE INVENTION The present invention has been conceived in view of the above points, and it is an object of the present invention to provide a system and method for monitoring temperature changes due to deterioration of various electrical apparatuses installed in a switchboard, It is an object of the present invention to provide a switchboard having a live display device and a protective relay operation voice alarm device capable of reducing the internal temperature of the busbar switch by supplying external air to the inside of the switchboard, thereby reducing the risk of fire and other safety accidents.

According to an aspect of the present invention, there is provided a switchboard including a live wire display device and a protection relay operation voice alarm device, the switchboard comprising: an enclosure having an electric device and an internal space through which a plurality of busbars connected to the electric device can be installed; A housing having a door installed on the enclosure to open and close the enclosure; A pump connected to the housing to supply outside air to the inside of the housing and including a filter for removing dust in the air supplied to the housing; A plurality of bus bars provided in the plurality of bus bars for detecting the temperature of each of the plurality of bus bars and an electric induction phenomenon using currents flowing through the plurality of bus bars, A current detector for detecting a current flowing through each of the plurality of busbars coupled to each of the plurality of busbars using electric power generated by the electromagnetic induction power source; A plurality of bus bar temperature detection modules each having a local optical communication section for converting a detection current detected by the detection section into an optical signal and transmitting the optical signal; A main optical communication unit installed in the housing and receiving an optical signal transmitted from a local optical communication unit of each of the plurality of bus bar temperature detection modules; And determining whether the detected current exceeds a predetermined upper temperature limit value and a reference current value and if the detected temperature of each of the plurality of bus bars exceeds the upper temperature limit value, And when the detected current of the booth bar exceeding the upper limit of the temperature exceeds the reference current value, it is determined that the temperature rise of the booth bar is caused by the overcurrent and generates an alarm signal, A controller for operating the pump to supply outside air into the housing; And a main optical communication unit of each of the plurality of bus bar temperature detecting modules and a main optical communication unit of the controller are connected to the main optical communication unit of the controller, And an optical cable connected in a single-loop manner.

When the temperature of the bus bar connected to the electric device rises to a value higher than a predetermined upper temperature limit and an abnormal symptom is diagnosed, which is the beginning of an accident, the alarm signal Outputting it to the manager, and driving the pump to supply the outside air to the housing, thereby lowering the temperature inside the housing, thereby delaying the occurrence of a fire or the like until the manager resolves the abnormality.

Further, in the switchboard having the live-wire display device and the protection-relay-activated voice alarm device according to the present invention, a detection signal detected by a plurality of bus bar temperature detecting modules provided in each of a plurality of bus bars is transmitted to a controller Therefore, the detection signal does not cause the interference due to the high voltage and the error due to the electromagnetic field, thereby enhancing the reliability of the detection signal, improving the accuracy of the abnormality diagnosis, and minimizing the error of the alarm signal generation. In addition, since a plurality of bus bar temperature detecting modules are connected to the controller through a single optical cable in a single-loop manner, the number of communication lines can be reduced and the structure can be simplified.

Further, in order to detect the temperature of the bus bar connected to the electric device, the bus bar temperature detecting module installed in the bus bar is connected to the electromagnetic induction power source unit, And generates electric power by an electromagnetic induction phenomenon using a current flowing through the bar to supply power necessary for the operation of the temperature detector. Therefore, it is possible to eliminate the structure for supplying the external power such as the power supply line, thereby reducing the interference with other devices in the housing, and further reducing the risk of accidents due to short circuits and the like.

1 is a perspective view illustrating a switchboard including a live line display device having an acoustic alarm and a voice alarm device for a protection relay according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a switchboard having a live-line display device having an acoustic alarm shown in FIG. 1 and a protection-alarm-operated voice alarm device along a line II-II.
FIG. 3 is a block diagram showing a main configuration of a switchboard having a live-line display device having an acoustic alarm shown in FIG. 1 and a voice alarm device for a protective relay operation.
4 is a view illustrating a state in which a bus bar temperature detection module is coupled to a booth bar of a switchboard having a live line display device having an acoustic alarm shown in FIG. 1 and a voice alarm device for a protective relay operation.
FIG. 5 is a side cross-sectional view showing a state in which a coupling portion temperature detection portion of the bus bar temperature detection module shown in FIG. 4 is installed in the bus bar.
6 is a schematic diagram showing the electromagnetic induction power source of the bus bar temperature detecting module shown in FIG.
FIG. 7 is a schematic diagram of a single-loop optical communication structure between a plurality of bus bar temperature detecting modules and a controller of a switchboard having a live-line display device having an acoustic alarm shown in FIG. 1 and a protective- .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, with reference to the accompanying drawings, a switchboard equipped with a live-line display device having an acoustic alarm according to the present invention and a voice alarm device for a protection relay will be described in detail.

FIG. 1 is a perspective view showing a switchboard having a live-line display device having an acoustic alarm and a protection-alarm-activated voice alarm device according to an embodiment of the present invention, FIG. 2 is a block diagram showing a live- Fig. 3 is a block diagram showing a main configuration of a switchboard having a live-line display device having an acoustic alarm shown in Fig. 1 and a voice alarm device for a protective relay operation; Fig. FIG.

As shown in FIGS. 1 to 3, a switchboard 100 having a live-line display device and a protection-relay-operated voice alarm device according to an embodiment of the present invention includes a housing 102, A room temperature sensor 120 and a humidity sensor 122 for detecting the temperature and humidity inside the housing 102 and a human body sensor 124 for detecting the approach state of a person A controller 126 for receiving a detection signal from various detection devices and diagnosing an abnormality that may be caused by an accident, an acoustic alarm 136 for generating an acoustic alarm signal, a plurality of A plurality of bus bar temperature detecting modules 140, 141 and 142 for detecting the temperature of the bus bars 107, 108 and 109 of the bus bar. The controller 126 controls the operation of various devices necessary for the operation of the switchboard 100 including the live display device such as the pump 116 and the protection relay operation voice alarm device.

The housing 102 includes an enclosure 103 and a door 104. The enclosure 103 is open to one side with an internal space in which the electric device 105 is installed. The door 104 is coupled to the enclosure 103 to open and close one open side of the enclosure 103. The electric device 105 is connected to a supply line (not shown) for supplying power to the inside of the housing 102 and is electrically connected to the bus bars 107, 108 and 109 for distributing the supplied electric power. The plurality of bus bars 107, 108 and 109 are connected to an electric device 105 installed inside the housing 102 as a bus bar of a conventional power transmission and distribution system to electrically connect the electric device 105 and an external device, The electric device 105 is electrically connected to other electric devices installed inside the housing 102. [ The plurality of bus bars 107, 108 and 109 are firmly fixed to the conductive portion 106 of the electric device 105 by bolts 110 (see FIG. 5) and nuts 111 (see FIG. 5) And is electrically connected to the conductive portion 106 of the semiconductor chip 105. When three-phase power is used, a plurality of bus bars 107, 108, and 109 can be used for R phase, S phase, and T phase.

An exhaust valve 113 is provided at one side of the housing 102. The exhaust valve 113 is installed above one side of the enclosure 103 so as to exhaust the air inside the housing 102 to the outside. The exhaust valve 113 is controlled by the controller 126 and can be opened / closed remotely.

A touch panel 114 is installed on the outer surface of the housing 102. The touch panel 114 is operated by the touch operation of the user and can display the overall operating state and the hysteresis state of the switchboard 100 having the live wire display device and the protection relay operation voice alarm device. The operator can easily grasp the operation state of the switchboard 100 having the live-line display device and the protective-relay-operated voice alarm device, and the hysteresis state for replacing or repairing the components through the touch panel 114. Then, the operator can update the history of the replacement or repair of the parts through the touch panel 114. [

The pump 116 is installed to be connected to the housing 102 on the outside of the housing 102 to supply outside air to the inside of the housing 102. The pump 116 may have various structures such as an air compressor for compressing and supplying external air. A filter 117 is installed in the pump 116. The filter 117 removes dust in the air supplied to the interior of the housing 102 by the pump 116. The filter 117 may be of various types such as a HEPA filter for removing bacteria, mold, fine dust, and the like.

The external air pumped by the pump 116 is supplied into the housing 102 through the air supply pipe 118. A dehumidifier 119 is installed in the middle of the air supply pipe 118.

The dehumidifier 119 is disposed between the housing 102 and the pump 116 and removes moisture from the outside air supplied to the housing 102 by the pump 116. If the moisture in the air supplied to the inside of the housing 102 is removed by the dehumidifier 119, the electric device 105 installed in the housing 102 can reduce the problem of leakage or malfunction due to moisture. Particularly, the air compressed by the pump 116 can be transferred to the electric device 105 inside the housing 102 while being adiabatically expanded in the process of flowing into the interior of the housing 102. The dehumidifier 119 The electric device 105 inside the housing 102 can be protected from moisture by removing moisture contained in the air. The dehumidifier 119 may be of various types, such as using a dehumidifying agent or using a cooling cycle. In the case of a dehumidifier that uses a cooling cycle, its operation can be controlled by the controller 126.

The room temperature sensor 120 is installed inside the housing 102 to detect the room temperature of the housing 102 and transmit the detection signal to the controller 126. [ The humidity sensor 122 is installed inside the housing 102 to detect the humidity inside the housing 102 and transmit the detection signal to the controller 126. [ The human body detection sensor 124 generates a detection signal when a human approaches the proximity distance set from the housing 102, and transmits the detection signal to the controller 126. The human body detection sensor 124 may be an infrared sensor, an ultrasonic sensor, a photo interrupter, or the like.

The controller 126 receives the detection signal of the indoor temperature of the housing 102 from the indoor temperature sensor 120 and opens the exhaust valve 113 when the internal temperature of the housing 102 rises above a predetermined temperature, The air in the housing 102 can be exhausted through the exhaust valve 113 by operating the exhaust valve 116 to supply the outside air to the inside of the housing 102. When hot air inside the housing 102 is exhausted through the exhaust valve 113 and the internal temperature of the housing 102 falls below a predetermined temperature range, the controller 126 stops the pump 116 and the exhaust valve 113 ).

The controller 126 receives a detection signal for the humidity inside the housing 102 from the humidity sensor 122 and opens the exhaust valve 113 when the humidity inside the housing 102 rises above a predetermined humidity, It is possible to operate the air conditioner 116 to supply the outside air from which moisture has been removed by the dehumidifier 119 to the inside of the housing 102 and exhaust the air inside the housing 102 through the exhaust valve 113. When the humid air in the housing 102 is exhausted through the exhaust valve 113 and the humidity inside the housing 102 falls below a predetermined range, the controller 126 stops the pump 116 and cuts off the exhaust valve 113 do.

When the controller 126 receives the detection signal from the human body sensor 124, the controller 126 controls the acoustic alarm 136 to generate an acoustic alarm signal or send an alarm or an alarm signal to the administrator or the maintenance center. When the human body detection sensor 124 detects an alarm signal when the person approaches the adjacent distance set from the housing 102, the alarm signal is transmitted to the switchgear 100 having the live signal display device and the protection relay operation voice alarm device, It is possible to reduce the risk of electric shock accidents caused by human body contact.

The controller 126 includes a plurality of filter amplifiers 127, 128, 129 and 130, an A / D converter 131, a processor 132, a storage 133, (134) and a main optical communication unit (135). The plurality of filter amplifiers 127, 128, 129 and 130 are connected to the indoor temperature sensor 120, the humidity sensor 122, the human body sensor 124 and the plurality of bus bar temperature detection modules 140 ) 142 and performs a function of amplifying a detection signal transmitted from various detection devices and removing noise. The A / D converter 131 digitally processes the detection signal that has passed through the filter amplifiers 127, 128, 129, and 130, and transmits the digital signal to the processor 132. The processor 132 diagnoses an abnormal symptom that causes an accident such as a fire or an electric shock from the detection signal of the detection devices. The storage unit 133 stores a detection signal of the detection devices, a hysteresis state of the switchboard 100 provided with the live line display device and the protection relay operation voice alarm device, a reference value for diagnosing an abnormality that is the beginning of an accident, . The wireless communication module 134 is for wireless communication with an administrator or a management center. When an abnormal symptom that is the beginning of an accident is diagnosed, a pre-stored notification character is transmitted to the manager through the wireless communication module 134, Can be transmitted to the management center. The data transmitted from the manager or the management center is transmitted to the switchboard 100 having the live display device and the protection relay operation voice alarm device via the wireless communication module 134 and stored in the storage 133 or the touch panel 114 ≪ / RTI > The main optical communication unit 135 is for optical communication with the plurality of bus bar temperature detection modules 140, 141, and 142.

The controller 126 receives detection signals from the indoor temperature sensor 120, the humidity sensor 122, the human body sensor 124, and the plurality of bus bar temperature detection modules 140, 141, and 142, The operation of the exhaust valve 113, the touch panel 114, the pump 116, and the acoustic alarm 136 are controlled. From the detection signals of the detection devices, an abnormal symptom that causes an accident such as a fire or electric shock is diagnosed. When an abnormal symptom is diagnosed, the controller 126 generates an alarm signal, controls the acoustic alarm 136 to generate a sound signal, and controls the wireless communication module 134 to inform the administrator or the management center. When the abnormality is diagnosed, the controller 126 opens the exhaust valve 113 and operates the pump 116 to supply the external air to the housing 102 to lower the internal temperature of the housing 102. As a result, Delays accidents such as fire till settlement.

Referring to FIG. 3, the acoustic alarm 136 receives an alarm signal from the controller 126 and outputs the alarm signal as an acoustic signal. The acoustic alarm 136 includes a PCM (Pulse Code Modulation) audio repeater 137 for outputting a pre-stored voice message when an alarm signal is generated in the controller 126, an audio repeater 137 for amplifying a voice output from the PCM audio repeater 137, An output amplifier 138, and a speaker 139 for outputting the sound output from the audio output amplifier 138 to the sound. The PCM audio repeater 137 transmits a message (voice) previously programmed and stored according to the alarm signal generated by the controller 126, to the audio output amplifier 138. The audio output amplifier 138 amplifies the magnitude of the sound to output the warning message to the speaker 139, and a voice message is output to the user through the speaker 139. [ The sound alarm 136 can output a voice message corresponding to an alarm occurrence situation such as a case where an abnormality symptom of an accident is diagnosed among the pre-stored voice messages or a human body detection sensor 124 detects a human access have. Of course, the acoustic alarm 136 may output a siren of a proper sound or a simple warning sound in accordance with an alarm occurrence situation.

As shown in FIGS. 2 and 3, the plurality of bus bar temperature detecting modules 140, 141 and 142 are installed in the plurality of bus bars 107, 108 and 109, respectively, 108) 109 is detected. Each of the bus bar temperature detecting modules 140, 141 and 142 includes a temperature detecting section 143 for detecting the temperature of each of the bus bars 107, 108 and 109, 108 and 109 by measuring the electric power generated by the electromagnetic induction power source unit 158 and an electromagnetic induction power source unit 158 for generating electric power by the electromagnetic induction phenomenon using the current flowing through the bus bars 107, And a local optical communication unit 166 for converting a detection signal detected by the temperature detection unit 143 and the current detection unit 165 into an optical signal and transmitting the optical signal.

The temperature detection unit 143 includes a body temperature detection unit 144 for detecting the temperature of an intermediate portion of the bus bars 107, 108 and 109 and a temperature detection unit 144 for detecting the temperature of the electric device 105 of the bus bars 107, And a coupling portion temperature detector 145 for detecting the temperature of the bolt coupling portion with the coupling portion. The body temperature detector 144 is installed in the middle of the bus bars 107, 108 and 109.

As shown in Figs. 4 and 5, the coupling portion temperature detecting portion 145 is installed in the bolting portion of the bus bars 107, 108, and 109 with the electric device 105. [ The coupling portion temperature detection portion 145 includes a metal sheath 146, a thermocouple 149, and an insulating material 155.

The metal sheath 146 has an insertion hole 147 and an installation groove 148, and is made of a metal having a high thermal conductivity. The metal sheath 146 is inserted into the insertion hole 147 in such a manner that the bolt 110 for coupling the conductive portion 106 of the electric device 105 and the bus bars 107, 107) 108 (109).

The thermocouple 149 is formed by removing a portion of each end of two metal conductors 150 and 151 made of two kinds of metals and then connecting ends of the metal conductors 150 and 151 by welding or the like . Such a thermocouple 149 utilizes the principle of the Seebeck effect that a current flows in a circuit when a temperature difference occurs between the connection portions of the two types of metal conductors 150 and 151 as is typical. As the two types of metal conductors 150 and 151, copper and constantane, chromel and alumel, platinum and platinum rhodium can be used. The thermocouple 149 is installed so that the connecting portion of the two metal conductors 150 and 151 is inserted into the mounting groove 148 of the metal sheath 146. The two metal conductors 150 and 151 constituting the thermocouple 149 are surrounded by the inner covering materials 152 and 153 and the outer covering material 154 and are extended to the outside of the metallic sheath 146 in an insulated state, And is connected to a power measuring unit (not shown).

The insulating material 155 insulates the metal sheath 146 from the thermocouple 149 by firmly filling the mounting groove 148 after the thermocouple 149 is inserted into the mounting groove 148 of the metal sheath 146. As the insulating material 155, powders of various inorganic insulating materials (MgO, Al 2 O, ZrO 2, etc.) may be used. The insulator 156 is tightly coupled to the opening of the metal sheath 146 after the metal sheath 146 is filled with the insulating material 155 to prevent the insulating material 155 filled in the mounting groove 148 from being discharged.

When the heat is generated in the bolt coupling portion between the electric device 105 and the bus bars 107, 108, and 109, the coupling portion temperature detection portion 145 generates thermoelectric power at the thermocouple 149, The temperature of the bus bars 107, 108, and 109 can be detected by converting the intensity of the bus bars 107 into temperature. That is, when the thermocouple 149 is located in the insulating material 155 inside the metal sheath 146 and heat generated at the bolt connecting portion between the electric device 105 and the bus bars 107, 108, 146 and the insulating material 155 to the thermocouple 149 so that the thermocouple 149 is not affected by the current flowing in the bus bars 107, The temperature of the bus bars 107, 108, and 109 can be measured by receiving the heat of the bus bars 109 and changing the thermoelectric power.

6, the electromagnetic induction power source unit 158 of the bus bar temperature detection module 140 (141) 142 is driven by an electromagnetic induction phenomenon using the current flowing through the bus bars 107, 108 and 109 And supplies the power required for the operation of the temperature detector 143. The electromagnetic induction power supply unit 158 includes an electromagnetic induction unit 160 having a secondary coil 159, a rectification unit 161, a constant voltage / constant current supply unit 162, and a charging unit 163. The electromagnetic induction unit 160 generates an alternating current by electromagnetic induction while current is applied to the bus bars 107, 108, and 109 using the secondary coil 159 provided therein. The magnitude of the alternating current induced in the secondary coil 159 is proportional to the flux linkage to the secondary coil 159. The rectifying unit 161 rectifies the alternating current induced in the electromagnetic induction unit 160 to a direct current. The constant voltage / constant current supply unit 162 applies the rectified direct current to the charging unit 163 to charge the charging unit 163. In the initial stage of charging, the charging unit 163 is charged in the constant current mode. When the charging voltage exceeds a predetermined reference, The charging unit 163 is charged in the constant voltage mode in which the charging voltage is kept constant.

Thus, the electromagnetic induction power supply unit 158 provided in the bus bar temperature detection modules 140, 141, 142 generates electric power by the electromagnetic induction phenomenon using the current flowing through the bus bars 107, 108, And supplies the power required for the operation of the temperature detector 143, so that a structure for supplying external power such as a power supply line can be eliminated. Therefore, it is possible to reduce the interference with other devices in the housing 102 and to further reduce the risk of accidents due to short-circuit or the like.

Referring to FIG. 3, the current detection unit 165 of the bus bar temperature detection module 140 (141) 142 is provided to detect a current flowing in the bus bars 107, 108, and 109. It is difficult to directly measure the current flowing through the bus bars 107, 108 and 109. Therefore, the current detecting unit 165 detects the current flowing through the bus bars 107 (108, 109) in an indirect manner using the electric power generated in the electromagnetic induction power source unit 158 108) 109 is detected. The intensity of the electric power generated by the electromagnetic induction power supply unit 158 is proportional to the intensity of the electric current flowing through the bus bars 107, 108 and 109. Therefore, it is possible to indirectly confirm the intensity of the current flowing through the bus bars 107, 108, and 109 from the intensity of the electric power generated by the electromagnetic induction power source unit 158. [ The current detection unit 165 uses such a principle to measure the current, voltage, or power generated in the electromagnetic induction power supply unit 158 and convert the measured value into the current intensity of the bus bars 107, 108, do.

The local optical communication unit 166 of the bus bar temperature detection modules 140, 141 and 142 detects the detection temperature detected by the body temperature detection unit 144 and the coupling unit temperature detection unit 145 of the temperature detection unit 143, 108, and 109 detected by the detection unit 165 into an optical signal and transmits the optical signal to the controller 126. [ The local optical communication unit 166 includes a light emitting element (not shown) for generating an optical signal in accordance with a detection signal. As the light emitting device, various devices capable of outputting optical signals such as an LED, an LD, and a laser diode can be used.

2 and 7, each of the local optical communication units 166 of the plurality of bus bar temperature detecting modules 140, 141 and 142 is connected to the main optical communication unit 135 of the controller 126 via the optical cable 168 ) In a single-loop manner. In the single-loop communication, a plurality of devices are connected by using one dedicated line connected to one device, and information is transmitted and received. In this manner, the plurality of bus bar temperature detecting modules 140, 141 and 142 are connected to each other through a single optical cable 168 in a single-loop manner without being connected to the controller 126 using separate communication lines. The number of communication lines can be reduced, and the structure can be simplified. A unique address is assigned to each of the plurality of bus bar temperature detecting modules 140, 141, 142. The body temperature detector 144, the coupling temperature detector 145 and the current detector 165 provided in the respective bus bar temperature detecting modules 140, 141 and 142 are also assigned unique addresses.

(The detection temperature of the body temperature detection section 144, the detection temperature of the coupling section temperature detection section 145, and the detection temperature of the current detection section 165) generated in each of the plurality of bus bar temperature detection modules 140, 141 and 142 Detected current) is converted into an optical signal by the local optical communication unit 166 and transmitted to the main optical communication unit 135 of the controller 126 through the optical cable 168 in a single-loop manner. Each of the detection signals received by the main optical communication unit 135 is amplified by the filter amplifying unit 130, the noise is removed, the digital signal processed by the A / D converting unit 131 is transmitted to the processor 132 . The processor 132 diagnoses an abnormal symptom that causes an accident such as a fire from a detection signal received from the plurality of bus bar temperature detecting modules 140, 141 and 142. That is, it is determined whether or not the detection temperatures of the plurality of bus bars 107, 108, and 109 received from the plurality of bus bar temperature detection modules 140, 141, and 142 exceed the predetermined upper temperature limit values And generates an alarm signal when the detected temperature exceeds a predetermined upper temperature limit value. At this time, since a unique address is assigned to each of the plurality of bus bar temperature detecting modules 140, 141 and 142, the processor 132 sets the upper temperature limit value among the plurality of bus bars 107, 108, It is possible to distinguish an overheated bus bar and generate an alarm signal accordingly.

The processor 132 generates an alarm signal, controls the acoustic alarm 136 to generate an acoustic alarm signal, and controls the wireless communication module 134 to transmit the acoustic alarm signal to the administrator or management center By sending an alarm character or an alarm signal, the administrator can take follow-up measures to prevent accidents. Therefore, an accident such as a fire can be prevented in advance.

As described above, the switchboard 100 having the live-line display device and the protection-relay-activated voice alarm device according to the present invention includes a plurality of busbar temperature detection modules 140 ) 141 and 142 is transmitted to the controller 126 which diagnoses an abnormal symptom in a single-loop manner via the optical cable 168. Therefore, compared with the conventional case, the detection signal is transmitted through the high- There is an advantage that the error caused by the error does not occur. Therefore, the reliability of the detection signal can be enhanced, the accuracy of the abnormality diagnosis can be improved, and the error of the alarm signal generation can be minimized. Since the optical cable 168 is made of a dielectric material (glass, plastic, or the like), it is advantageous that various electronic devices can be installed in the housing 102, which is complicatedly arranged, without any risk of short circuit.

Further, the switchboard 100 provided with the live-line display device and the protection-relay-activated voice alarm device according to the present invention diagnoses an abnormal symptom using various analysis factors in relation to the temperature rise of the busbars 107, 108, Therefore, the accuracy of the diagnosis can be improved. The causes of temperature rise of the bus bars 107, 108, and 109 vary. The heat generated when the electric device 105 deteriorates and is overheated can be conducted to increase the temperature of the bus bars 107, 108 and 109 and the over current to the bus bars 107, 108 and 109 The temperature of the bus bars 107, 108, and 109 may rise. The bolts 110 are loosened at the bolts 107 of the bus bars 107 and 108 and the bolts of the electric device 105 so that the coupling force between the bus bars 107, The temperature of the bus bars 107, 108, and 109 may rise due to the increase in resistance. The bus bar temperature detection module 140, 141 and 142 detect the temperature of the middle portion of the bus bars 107, 108 and 109 by the body temperature detector 144, The current detection unit 165 detects the current intensity of the bus bars 107, 108 and 109 and detects the current intensity of the bus bars 107, And analyzes the temperature rise of the bus bars 107, 108 and 109 using the detection signal as an analysis factor. Therefore, it is possible to more accurately determine the cause of the temperature rise of the bus bars 107, 108, and 109, and to improve the diagnostic accuracy of the abnormal symptom.

For example, the controller 126 receives a detection signal from each of the plurality of bus bar temperature detecting modules 140, 141, and 142, and determines whether the detected temperature of the plurality of bus bars 107, 108, It is determined whether or not the detected current of the bus bar exceeds the preset reference current value. If the detected current of the bus bar exceeds the reference current value, the controller determines that the temperature rise of the booth bar is due to the overcurrent, A message indicating the cause of the temperature rise of the busbar can be output. Such an alarm signal may be transmitted to the administrator or the management center via the wireless communication module 134, or displayed on the touch panel 114.

On the other hand, if the detection current of the booth bar exceeding the upper temperature limit value is below the reference current value, it is judged that the temperature rise of the booth bar is caused by the overheating of the electric device connected to the bus bar and the lowering of the coupling force between the bus bar and the electric device . In analyzing the reason for raising the temperature of the booth bar, it is possible to determine whether the temperature rise of the booth bar is caused by the overheating of the electric device connected to the booth bar by using the detection temperature of the body temperature detection unit 144 and the detection temperature of the coupling unit temperature detection unit 145 , It can be judged whether or not it is due to a decrease in the bonding force between the bus bar and the electric device. For example, when the detection temperature of the coupling portion temperature detection portion 145 is higher than the detection temperature of the body temperature detection portion 144 by a predetermined temperature or more, it can be determined that the temperature rise of the bus bar is caused by a decrease in the coupling force between the bus bar and the electric device have. Of course, the cause of the temperature rise of the busbar may include a detection signal of the body temperature detector 144, a detection signal of the coupling portion temperature detector 145, a detection signal of the current detector 165, Can be analyzed through various analytical algorithms.

Although the preferred embodiments of the present invention have been described above, the scope of the present invention is not limited to the embodiments described above.

For example, although the figure shows that the temperature detection unit 143 of the bus bar temperature detection module 140 (141) 142 is divided into the body temperature detection unit 144 and the coupling unit temperature detection unit 145, The detection part can be changed into various structures capable of detecting the temperature of the bus bar. Further, the coupling portion temperature detector 145 can be changed to a structure other than the structure using the thermocouple 149 as shown in FIG.

The figure also shows that the current detection section 165 for detecting the current intensity of the bus bars 107, 108 and 109 of the bus bar temperature detection modules 140, 141 and 142 is provided, It is also possible to constitute the bus bar temperature detecting module by omitting the detecting section.

In addition, a protective relay may be installed inside the housing. The protection relay can detect the temperature of the inside of the housing when the temperature rises above the set temperature and cut off the power applied to the busbar. The protection relay may be driven by thermal expansion, or the bridge circuit may be operated out of balance due to temperature changes.

The acoustic alarm may be activated during operation of the protection relay. That is, the acoustic alarm detects that the protection relay rises to the dangerous temperature inside the housing and drives the bus relay when the power applied to the busbar is cut off, thereby generating an acoustic signal. At this time, the acoustic signal may generate an acoustic signal different from the acoustic signal generated by the controller.

100: Switchboard with live signal display and protective relay operating voice alarm
102: housing 103: enclosure
104: Door 105: Electric device
107, 108, 109: Busbar 110: Bolt
111: Nut 113: Exhaust valve
114: touch panel 116: pump
117: filter 118: air supply pipe
119: Dehumidifier 120: Room temperature sensor
122: Humidity sensor 124: Human body sensor
126: controllers 127, 128, 129, 130:
131: A / D conversion unit 132:
133: storage unit 134: wireless communication module
136: acoustic alarm 137: PCM audio repeater
138: Audio output amplifier 139: Speaker
140, 141, 142: Bus bar temperature detection module
143: Temperature detection unit 144: Body temperature detection unit
145: Coupling unit temperature detector 146: Metal sheath
148: Mounting groove 149: Thermocouple
150, 151: metal conductors 152, 153: inner covering material
154: outer covering material 155: insulating material
156: insulator 158: electromagnetic induction power source
159: secondary coil 160: electromagnetic induction part
161: rectification part 162: constant voltage / constant current supply part
163: Charging unit 165: Current detection unit
166: Local optical communication unit 168: Optical cable

Claims (5)

In a switchboard having a live display device and a protective relay operated voice alarm device for supplying electric power or controlling electric power facilities,
A housing having an enclosure having an electric device and an internal space through which a plurality of busbars connected to the electric device can be installed, and a door installed in the enclosure to open and close the enclosure;
A pump connected to the housing to supply outside air to the inside of the housing and including a filter for removing dust in the air supplied to the housing;
A plurality of bus bars provided in the plurality of bus bars for detecting the temperature of each of the plurality of bus bars and an electric induction phenomenon using currents flowing through the plurality of bus bars, A current detector for detecting a current flowing through each of the plurality of busbars coupled to each of the plurality of busbars using electric power generated by the electromagnetic induction power source; A plurality of bus bar temperature detection modules each having a local optical communication section for converting a detection current detected by the detection section into an optical signal and transmitting the optical signal;
A main optical communication unit installed in the housing and receiving an optical signal transmitted from a local optical communication unit of each of the plurality of bus bar temperature detection modules; And determining whether the detected current exceeds a predetermined upper temperature limit value and a reference current value and if the detected temperature of each of the plurality of bus bars exceeds the upper temperature limit value, And when the detected current of the booth bar exceeding the upper limit of the temperature exceeds the reference current value, it is determined that the temperature rise of the booth bar is caused by the overcurrent and generates an alarm signal, A controller for operating the pump to supply outside air into the housing; And
And a main optical communication unit of each of the plurality of bus bar temperature detection modules is connected to the main optical communication unit of the controller by a single- And an optical cable connected in a single-loop manner,
Wherein the temperature detecting unit comprises:
A body temperature detector for detecting a temperature of an intermediate portion of each of the plurality of bus bars,
A plurality of bus bars, each of which is fixed to each of the plurality of bus bars by a bolt for coupling the plurality of bus bars and the electric device to each of the plurality of bus bars to detect the temperature of each of the plurality of bus bars, A thermocouple installed between the metal sheath and the metal sheath so as to be inserted into an installation groove of the metal sheath and connected to the ends of the metal sheath and the metal sheath to insulate the metal sheath from the thermocouple, And a connection unit temperature detection unit including a connection unit temperature detection unit including a connection unit temperature detection unit and a protection relay operation voice alarm unit. The method according to claim 1,
The electromagnetic induction power supply unit includes:
An electromagnetic induction unit including a secondary coil for generating an alternating current through electromagnetic induction while a current is applied to the bus bar,
A rectifying unit for rectifying the alternating current induced in the electromagnetic induction unit to a direct current,
A charging section for charging the rectified current in the rectifying section, and
And a constant voltage / constant current supply unit for applying a direct current rectified by the rectifying unit to the charging unit to charge the charging unit and reducing the applied current when the charging voltage is equal to or higher than the reference value and keeping the charging voltage constant, Switchgear with alarm. delete The method according to claim 1,
An indoor temperature sensor installed inside the housing to measure a temperature inside the housing and transmit the measured temperature to the controller;
A humidity sensor installed inside the housing to measure humidity inside the housing and transmit the measured humidity to the controller;
A dehumidifier installed between the housing and the pump to remove moisture from outside air supplied to the housing by the pump; And
And an exhaust valve installed in the housing to exhaust air inside the housing,
The controller operates the pump to supply outside air into the housing when the temperature inside the housing rises above a predetermined temperature. When the humidity inside the housing rises above a predetermined humidity, the controller operates the pump and the dehumidifier And the air in the housing is exhausted through the exhaust valve by opening the exhaust valve when outside air is supplied into the housing by the operation of the pump And a protection relay operating voice alarm device. The method according to claim 1,
A protection relay for detecting a temperature of the inside of the housing when the temperature rises above a set temperature and for blocking power applied to the plurality of bus bars; And
And a sound alarm for generating a sound signal when the protection relay is activated.
KR1020150188757A 2015-12-29 2015-12-29 Distributing Panel Having Power Line Checking Device and Protective Relay Operation Sound Warning Device KR101606704B1 (en)

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KR101694708B1 (en) * 2016-07-01 2017-01-23 김기웅 Booth bar for temperature sensing and control
KR101713076B1 (en) 2016-08-26 2017-03-07 (주)오엔앰 코리아 Measuring value and operating state indicating system for protection function of protective relay
KR101889759B1 (en) * 2018-03-13 2018-08-20 성도제 Cover type Indicator for Terminal
KR101906483B1 (en) * 2017-04-07 2018-10-10 이용주 Bus bar status detection device for integrated self-powered and monitoring system for switchboard using the same
KR101930739B1 (en) * 2017-10-25 2018-12-19 재단법인한국조선해양기자재연구원 Switch apparatus
CN111313281A (en) * 2019-10-30 2020-06-19 国网山西省电力公司运城供电公司 Low-voltage distribution side control device
CN116093763A (en) * 2022-11-30 2023-05-09 南通鑫源电器制造有限公司 Waterproof self-cooling type box transformer substation
KR102654584B1 (en) * 2023-07-10 2024-04-05 (주)빅트론 An unmanned management system of electrical room for tunnel

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101694708B1 (en) * 2016-07-01 2017-01-23 김기웅 Booth bar for temperature sensing and control
KR101713076B1 (en) 2016-08-26 2017-03-07 (주)오엔앰 코리아 Measuring value and operating state indicating system for protection function of protective relay
KR101906483B1 (en) * 2017-04-07 2018-10-10 이용주 Bus bar status detection device for integrated self-powered and monitoring system for switchboard using the same
KR101930739B1 (en) * 2017-10-25 2018-12-19 재단법인한국조선해양기자재연구원 Switch apparatus
KR101889759B1 (en) * 2018-03-13 2018-08-20 성도제 Cover type Indicator for Terminal
CN111313281A (en) * 2019-10-30 2020-06-19 国网山西省电力公司运城供电公司 Low-voltage distribution side control device
CN116093763A (en) * 2022-11-30 2023-05-09 南通鑫源电器制造有限公司 Waterproof self-cooling type box transformer substation
KR102654584B1 (en) * 2023-07-10 2024-04-05 (주)빅트론 An unmanned management system of electrical room for tunnel

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