System and Method for providing alarm to secure safety of surroundings of power utilities

Abstract

An alarm system is provided to ensure the safety of the surroundings of power equipment in the event of internal insulation breakdown of power equipment. The alarm system is characterized by comprising a plurality of power equipment disposed in a power equipment room, a plurality of pressure sensors installed on the plurality of power equipment that sense pressure fluctuations and generate sensing information, and an alarm emission device that outputs alarm information according to the sensing information obtained from the plurality of pressure sensors. According to the present invention, when pressure rises inside a power facility, a voice alarm is transmitted to the site, enabling nearby workers to recognize hazardous locations and / or ensure their safety.

Description

Technology Field

[0001] The present invention relates to power system equipment, and more specifically, to an alarm system and method for ensuring the safety of the surroundings of power equipment in the event of internal insulation breakdown of power equipment. Background Technology

[0002] Generally, power suppliers install the facilities necessary for electricity supply and manage them by consolidating them in a space called a substation. In the past, facility management was carried out by personnel in the form of 24-hour shift work. However, with the development of unmanned technology, multiple substations are now efficiently managed and operated by comprehensively monitoring and controlling them in a separate space equipped with a Supervisory Control and Data Acquisition (SCADA) system called a dispatch branch.

[0003] However, the power dispatch substation performs only the role of simple equipment monitoring and control; separate personnel inspections are required for the condition and maintenance of the equipment, and are being carried out accordingly.

[0004] Inspection cycles are determined based on equipment characteristics, and live-line inspections and de-energization inspections are conducted by personnel accordingly. Live-line inspections involve verifying the external appearance of the equipment (checking for joints, pressure status, abnormalities in condition monitoring, etc.) while the line is live, whereas de-energization inspections involve shutting down the equipment to utilize separate equipment to inspect its performance in detail and / or perform repairs.

[0005] With the recent implementation of the Serious Accidents Punishment Act, various policies aimed at preventing safety accidents are being utilized in the field as safety measures. Furthermore, failures caused by internal insulation breakdown are continuously occurring in the field among the various facilities at the aforementioned substation. Therefore, there is a need for preventive measures to prepare for potential additional safety accidents.

[0006] Furthermore, if an internal insulation breakdown failure occurs nearby while personnel are conducting external inspections of live equipment, it could become a vulnerability that results in multiple casualties. Prior art literature

[0007] 1. Korean Patent Publication No. 10-2020-0119101 The problem to be solved

[0008] The present invention is proposed to resolve the problems according to the background technology above, and aims to provide an alarm system and method for ensuring safety around power equipment in the event of internal insulation breakdown of power equipment.

[0009] In addition, another objective of the present invention is to provide an alarm system and method capable of preventing vulnerable factors that can cause multiple casualties during the external inspection of live-line equipment. means of solving the problem

[0010] To achieve the above-mentioned objectives, the present invention provides an alarm system for ensuring the safety of the surroundings of a power facility in the event of internal insulation breakdown of the power facility.

[0011] The above alarm system is,

[0012] A number of power facilities arranged in the power facility room;

[0013] A plurality of pressure sensors installed in a plurality of the above-mentioned power facilities and generating sensing information by sensing pressure fluctuations; and

[0014] It is characterized by including an alarm emitting device that outputs alarm information according to the sensing information obtained from a plurality of pressure sensors.

[0015] At this time, the sensing information is characterized by having a step-by-step alarm transmission signal according to the magnitude of the pressure fluctuation.

[0016] In addition, the plurality of pressure sensors are characterized by comprising: a sensing unit that senses the internal pressure of the plurality of power facilities and calculates a pressure value; a microcomputer that compares the pressure value with a preset reference value and generates sensing information having a step-by-step alarm transmission signal according to the comparison result; and a communication unit that transmits the sensing information to the alarm emission device.

[0017] In addition, the plurality of pressure sensors are characterized by including a display unit that outputs a setting menu to display the pressure value or set the reference value.

[0018] In addition, the alarm emitting device is characterized by comprising: a communication unit that receives sensing information from a plurality of pressure sensors; a control unit that generates alarm information converted into an alarm form according to the sensing information; and an alarm output unit that outputs the alarm information.

[0019] In addition, the alarm output unit is characterized by having a set size for the transmission of the alarm information.

[0020] In addition, the alarm emitting device is characterized by having a magnetic attachment frame that is movably attached to the top or side of the power facility.

[0021] In addition, the alarm emitting device is characterized by being installed as a pair with each of the plurality of pressure sensors, or by being installed as a single unit in a pre-grouped number among the plurality of pressure sensors.

[0022] In addition, a number of the above-mentioned power facilities are characterized as being gas-insulated switchgear (GIS).

[0023] On the other hand, another embodiment of the present invention provides an alarm method for ensuring safety around power equipment, characterized by comprising: (a) a step of generating sensing information by sensing pressure fluctuations of a plurality of power equipment disposed in a power equipment room using a plurality of pressure sensors; and (b) a step of outputting alarm information according to the sensing information obtained from the plurality of pressure sensors using an alarm emitting device.

[0024] At this time, the above step (a) is characterized by comprising: (a-1) a step in which a sensing unit senses the internal pressure of a plurality of power facilities and calculates a pressure value; (a-2) a step in which a microcomputer compares the pressure value with a preset reference value and generates sensing information having a step-by-step alarm transmission signal according to the comparison result; and (a-3) a step in which a communication unit transmits the sensing information to an alarm emission device.

[0025] In addition, the above step (a-1) is characterized by including the step of outputting a setting menu to display the pressure value on the display unit or to set the reference value.

[0026] Additionally, the above step (b) is characterized by comprising: a communication unit receiving sensing information from a plurality of pressure sensors; a control unit generating alarm information converted into an alarm form according to the sensing information; and an alarm output unit outputting the alarm information. Effects of the invention

[0027] According to the present invention, when pressure rises inside a power facility, a voice alarm is transmitted to the site, enabling nearby workers to recognize hazardous locations and / or ensure their safety.

[0028] In addition, another advantage of the present invention is that it can be applied to various facilities such as sensing and alarm transmission by utilizing pressure gauge and hydraulic gauge contacts in addition to power circuit breakers, such as GIS (Gas-insulated Switch Gear) and EGIS (Environment-Friendly GIS). Brief explanation of the drawing

[0029] Figure 1 is a typical layout of a high-voltage circuit breaker room. FIG. 2 is a block diagram of an alarm system for ensuring safety around power facilities according to an embodiment of the present invention. Figure 3 is a detailed block diagram of the pressure sensor shown in Figure 2. Figure 4 is a detailed configuration block diagram of the alarm release device shown in Figure 2. Figure 5 is an example of the pressure sensor and alarm release device shown in Figure 2 being installed. FIG. 6 is a flowchart showing the process of outputting an alarm for ensuring safety around power facilities according to an embodiment of the present invention. Specific details for implementing the invention

[0030] The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the invention to specific embodiments, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention.

[0031] When describing each drawing, similar reference numerals are used for similar components.

[0032] Terms such as first, second, etc., may be used to describe various components, but said components should not be limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another.

[0033] For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. The term "and / or" includes a combination of a plurality of related described items or any of a plurality of related described items.

[0034] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which this invention pertains.

[0035] Terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0036] Hereinafter, an alarm system and method for ensuring safety around power facilities according to an embodiment of the present invention will be described in detail with reference to the attached drawings.

[0038] Figure 1 is a general layout diagram of a high-voltage circuit breaker room. Referring to Figure 1, current circuit breakers (gas switching insulation devices, dry air switching insulation devices, etc.) use SF6 gas or dry air as a medium to maintain insulation inside the equipment.

[0039] A pressure gauge is installed on the field equipment itself to check pressure, and the gauge reading range can be set. Normal ranges are set and managed by manufacturer, and the system is configured to generate a pressure-related alarm if the pressure gauge reading deviates from the normal range, allowing for remote detection of equipment malfunctions.

[0040] In the past, equipment-centered management focused on soundness or reliability, which could lead to a cascade of equipment failures when internal pressure dropped.

[0041] Most GIS are installed in confined indoor spaces (i.e., GIS rooms), and the location of the pressure relief valve—a component that releases pressure in the event of internal insulation breakdown—interferences with manual inspection routes. Furthermore, since there is a constant risk of flying debris even when the pressure relief valve operates, it is crucial for workers to detect equipment failures in advance. Therefore, it is necessary to reinforce the surrounding safety system to alert the surrounding area of ​​the danger.

[0042] FIG. 2 is a block diagram of an alarm system (200) for ensuring safety around power equipment according to an embodiment of the present invention. Referring to FIG. 2, the system may be configured to include a power equipment room (210) in which power equipment (211-1 to 211-n) is arranged, pressure sensors (220-1 to 220-n) installed in the power equipment (211-1 to 211-n) that sense pressure fluctuations and generate sensing information, and an alarm emitting device (230) that outputs alarm information according to the sensing information obtained from the pressure sensors (220-1 to 220-n).

[0043] The power equipment room (210) is composed of first to nth power equipment (211-1 to 211-n) as shown in FIG. 1. The first to nth power equipment (211-1 to 211-n) is arranged in parallel. The first to nth power equipment (211-1 to 211-n) can be a Gas Insulated Switchgear (GIS). Of course, in addition to such a Gas Insulated Switchgear, it can be an equipment that utilizes an EGIS, pressure gauge, and hydraulic contact.

[0044] In the case of gas-insulated switchgear, the interior is filled with SF6 gas or dry air with insulating properties and grounded to a metal enclosure. The metal enclosure houses switches such as circuit breakers (CB), disconnectors, and earthling switches, as well as auxiliary equipment such as current transformers (CT), voltage transformers, and lightning arresters. Gas-insulated switchgear is a general term for main circuit breakers among the components of substations of 154kV or higher.

[0045] The first to nth pressure sensors (220-1 to 220-n) are configured within the power equipment room (210) and are installed in the first to nth power equipment (211-1 to 211-n). Of course, the pressure sensors (220-1 to 220-n) may be connected to each of the first to nth power equipment (211-1 to 211-n), or they may be installed in units grouped together (i.e., units of pre-grouped units). To elaborate, the first pressure sensor (220-1) is installed in the first power equipment (211-1), and the second pressure sensor (220-2) is installed in the second power equipment (211-2).

[0046] For example, installations in each unit may include a first pressure sensor (220-1) installed in the first power facility (211-1), no pressure sensors installed in the second to fourth power facilities (211-2 to 211-4), and a second pressure sensor (220-2) installed in the fifth power facility (211-5).

[0047] The first to nth pressure sensors (220-1 to 220-n) perform the function of sensing pressure fluctuations of the installed power equipment and generating sensing information.

[0048] The alarm emission device (230) receives sensing information from the pressure sensors (220-1 to 220-n) and performs the function of outputting alarm information. The alarm information may be output as a combination of voice, sound, graphics, text, etc. The alarm emission device (230) may be installed as a single unit or may be installed as a pair with the pressure sensors. In addition, it may be installed in units of several units.

[0049] FIG. 3 is a detailed block diagram of the pressure sensors (220-1 to 220-n) illustrated in FIG. 2. Referring to FIG. 3, the pressure sensors (220-1 to 220-n) may be configured to include a sensing unit (310) that senses the internal pressure of power equipment (211-1 to 211-n) and calculates a pressure value, a microcomputer (320) that outputs the pressure value to a display unit (340) and generates sensing information having a step-by-step alarm transmission signal by comparing it with a reference value set through the display unit (340), a communication unit (330) that transmits the sensing information to an alarm emission device (230), and a display unit (340) that displays the sensing value.

[0050] The sensing unit (310) can be a pressure gauge. That is, it measures internal pressure and calculates a pressure value. In particular, the sensing unit (310) can be a digital meter type. That is, the measured value can be calculated as a digital value.

[0051] The microcomputer (320) performs the function of outputting the pressure value calculated by the sensing unit (310) to the display unit (340). In addition, it allows the user to set a reference value through the display unit (340), stores the set reference value, and performs the function of generating sensing information having a step-by-step alarm transmission signal according to the magnitude of the pressure fluctuation by comparing this reference value with the pressure value.

[0052] To elaborate on the step-by-step alarm transmission signal, for example, if the normal pressure is 0.52 MBar, this becomes the reference value. Therefore, a pressure increase to 0.6 MBar constitutes Step 1, and a pressure increase to 0.7 MBar constitutes Step 2. In other words, the structure allows for the activation of contacts for each step, enabling an external alarm via the contacts. Of course, the alarm intensity increases in Step 2 compared to Step 1. Naturally, a step can have three or more contacts.

[0053] The communication unit (330) performs the function of transmitting sensing information to the alarm emitting device (230) via wired or wireless communication. To this end, the communication unit (330) may include a modem, a microprocessor, a communication circuit, etc. Wired communication may be RS232, RS485, Modbus, CC-Link (Control & Communication) communication, Ethernet communication, etc. Meanwhile, wireless communication may be IrDA (Infrared Data) communication, Wireless LAN (Local Area Network), ZigBee, Bluetooth, LiFi (Light Fidelity), WiFi (Wireless Fidelity), NFC (Near Field Control), etc.

[0054] The display unit (340) displays a pressure value and displays a setting menu for the user to set a reference value. To this end, the display unit (340) may be configured as a touch screen. Of course, it is also possible to configure a physical button.

[0055] FIG. 4 is a detailed block diagram of the alarm emission device (230) illustrated in FIG. 2. Referring to FIG. 4, the alarm emission device (230) may be configured to include a communication unit (410) that receives sensing information from pressure sensors (220-1 to 220-n), a control unit (420) that generates alarm information converted into an alarm form according to the sensing information, and an alarm output unit (430) that outputs the alarm information. Of course, it may also include an input unit (450) for inputting user commands, a storage unit (440) for storing data, etc.

[0056] The communication unit (410) can be connected to the pressure sensors (220-1 to 220-n) via wired or wireless communication. To this end, the communication unit (410) may include a modem, a microprocessor, a communication circuit, etc.

[0057] The control unit (420) performs the function of generating alarm information that is converted into an alarm form according to the sensing information. The alarm information may mainly be a pre-set voice, but is not limited thereto, and may use sound (i.e., siren), lighting, graphics, etc., or a combination thereof. To this end, the control unit (420) may be configured to include a microprocessor, a microcomputer, etc.

[0058] The alarm display unit (430) can selectively output one or a combination of voice, sound, lighting, graphics, etc., according to the control of the control unit (420). To this end, it may be configured to include a warning light, a speaker, a display, etc.

[0059] Of course, it may simply include only a speaker. In this case, an on / off button for speaker mode may be provided, and the volume of sound output (i.e., the output of alarm information) at the site may be adjustable in steps. The steps may consist of three levels: low, medium, and high.

[0060] Additionally, the control unit (420) can be connected to an external communication network through the communication unit (410), and through this, can transmit to a higher-level system, SCADA (Supervisory Control and Data Acquisition).

[0061] An external communication network refers to a connection structure that enables information exchange between individual nodes, such as multiple terminals and servers, and can be a Public Switched Telephone Network (PSTN), Public Switched Digital Network (PSDN), Integrated Services Digital Network (ISDN), Broadband Integrated Services Digital Network (BISDN), Local Area Network (LAN), Metropolitan Area Network (MAN), or Wide Area Network (WLAN).

[0062] However, the present invention is not limited thereto and may be wireless communication networks such as CDMA (Code Division Multiple Access), WCDMA (Wideband Code Division Multiple Access), Wibro (Wireless Broadband), WiFi (Wireless Fidelity), DLNA (Digital Living Network Alliance), Zigbee, Z-wave, HSDPA (High Speed ​​Downlink Packet Access) networks, Bluetooth, RFID (Radio Frequency Identification), Infrared Data Association (IrDA), Ultra-wide Band, Wireless USB (Wireless Universal Serial Bus), NFC (Near Field Communication) networks, satellite broadcasting networks, analog broadcasting networks, DMB (Digital Multimedia Broadcasting) networks, etc. Alternatively, it may be a combination of these wired communication networks and wireless communication networks.

[0063] In addition, the external communication network may include a power communication network. A power communication network refers to a network configured for communication by flowing data signals over existing power lines using Power Line Communication (PLC) technology. The power lines consist of high-voltage power lines (approx. 22.9 kV) and / or low-voltage power lines (approx. 110–220 V). Furthermore, the power communication network is configured to include repeaters, power communication modems, transformers, etc. The master modem performs the function of connecting the power communication network to the existing communication network.

[0064] Referring to FIG. 4, the storage unit (440) can store programs, software, voice data, etc., having an algorithm that generates alarm information converted into an alarm form according to sensing information. To this end, the storage unit (440) may be a memory provided within the control unit (420) or may be a separate memory. Additionally, it may be composed of a combination of non-volatile memory such as a flash memory disk (SSD: Solid State Disk), a hard disk drive, flash memory, EEPROM (Electrically erasable programmable read-only memory), SRAM (Static RAM), FRAM (Ferro-electric RAM), PRAM (Phase-change RAM), MRAM (Magnetic RAM), and / or volatile memory such as DRAM (Dynamic Random Access Memory), SDRAM (Synchronous Dynamic Random Access Memory), and DDR-SDRAM (Double Data Rate-SDRAM).

[0065] The input unit (450) performs the function of receiving commands from the user. The commands may be operations, touches, etc. Accordingly, they may be operation keys, touch screens, etc., and combinations thereof. The input unit (450) may also be capable of displaying functions by using a touch screen.

[0066] The alarm emitting device (230) may have a magnetic plate configured on the lower part of the housing outer casing (not shown) so that it can be movably attached to the upper or side of the power equipment. That is, it may be in the form of a magnetic attachment type. The magnet can be attached or detached depending on site conditions, and if fixation with a frame is required, it can be changed to a frame type fixed to the casing.

[0067] In addition, the power source of the alarm emitting device (230) may be commercial power, or it may be a method using a battery.

[0068] FIG. 5 is an example in which the pressure sensors (220-1 to 220-n) and alarm release device (230) shown in FIG. 2 are installed. Referring to FIG. 5, the gas-insulated switchgear (GIS) is equipped with pressure relief valves (550, 560) to safely discharge internal pressure to the outside in the event of internal pressure fluctuations, particularly pressure rise. The location and structure of the pressure relief device vary by manufacturer, and in FIG. 5, the pressure relief valves (550, 560) are configured on the rear surface (530).

[0069] The pressure relief valve (550, 560) performs the function of protecting the tank from pressure rise caused by abnormal phenomena such as arc generation and protecting the product. Pressure sensors (220-1 to 220-n) are installed in the pressure relief valve (550, 560) to measure the internal pressure of the gas-insulated switchgear.

[0070] The front surface (520) of the gas-insulated switchgear has a rectangular box shape. An alarm release device (230) may be installed on the top of this rectangular box. An instrument panel, an operating panel, etc. are installed on the front surface (520), and this instrument panel and operating panel are connected to internal components (540). Internal components may include switches such as circuit breakers (CB), disconnectors, and earthling switches, as well as auxiliary devices such as current transformers (CT), voltage transformers, and lightning arresters.

[0071] FIG. 6 is a flowchart showing the process of outputting an alarm for ensuring safety around power equipment according to an embodiment of the present invention. Referring to FIG. 6, pressure sensors (220-1 to 220-n) proceed in a sensing mode (step S610). To elaborate, pressure sensors (220-1 to 220-n) perform real-time monitoring of power equipment (211-1 to 211-n) placed in the actual power equipment room (210).

[0072] As a result of monitoring, it is checked whether the sensed pressure value exceeds a preset reference value (e.g., 0.52 MBar) (step S620).

[0073] In step S620, if the check confirms that the sensed pressure value does not exceed the reference value, steps S610 to S620 are performed.

[0074] In contrast, at step S620, if the detected pressure value exceeds the reference value, it is checked whether there is a pressure increase step by step (step S630).

[0075] In step S630, if there is no pressure increase stepwise, sensing information is generated and transmitted to the alarm release device (230) (step S650). Afterwards, an alarm is output (step S660).

[0076] In contrast, at step S630, if there is a pressure increase step by step, contact operation information is determined step by step, and sensing information is generated based on this determination and transmitted to the alarm emission device (230) (steps S640, S650).

[0078] Additionally, the steps of the method or algorithm described in connection with the embodiments disclosed herein may be implemented in the form of program instructions that can be executed through various computer means, such as a microprocessor, a processor, a CPU (Central Processing Unit), etc., and recorded on a computer-readable medium. The computer-readable medium may include program (instruction) code, data files, data structures, etc., either alone or in combination.

[0079] The program (instruction) code recorded on the above medium may be those specifically designed and configured for the present invention, or those known and available to those skilled in the art of computer software. Examples of computer-readable recording media may include magnetic media such as hard disks, floppy disks, and magnetic tapes; optical recording media such as CD-ROMs, DVDs, and Blu-rays; and semiconductor memory devices specifically configured to store and execute program (instruction) code, such as ROM (Read Only Memory), RAM (Random Access Memory), and flash memory.

[0080] Here, examples of program (instruction) code include not only machine code, such as that generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter, etc. The aforementioned hardware device may be configured to operate as one or more software modules to perform the operation of the present invention, and vice versa. Explanation of the symbols

[0081] 200: Alarm System 210: Power Equipment Room 211-1 to 211-n: 1st to nth power equipment 220-1 to 220-n: 1st to nth pressure sensors 230: Alarm Release Device 310: Sensing unit 320: Microcontroller 330,410: Communication unit 340: Display unit 420: Control unit 440: Storage unit 450: Input section 520: Front 530: Rear 550,560: Pressure relief valve

Claims

Claim 1 A plurality of power equipment (211-1 to 211-n) disposed in a power equipment room (210); a plurality of pressure sensors (220-1 to 220-n) installed in the plurality of power equipment (211-1 to 211-n) and sensing pressure fluctuations to generate sensing information; and an alarm emission device (230) that outputs alarm information according to the sensing information obtained from the plurality of pressure sensors (220-1 to 220-n); wherein the sensing information has a step-by-step alarm transmission signal according to the magnitude of the pressure fluctuation, and the plurality of pressure sensors (220-1 to 220-n) include: a sensing unit (310) that senses the internal pressure of the plurality of power equipment (211-1 to 211-n) and calculates a pressure value; and a microcomputer (320) that compares the pressure value with a preset reference value and generates sensing information having the step-by-step alarm transmission signal according to the comparison result. The alarm system for ensuring safety around power equipment includes a communication unit (330) that transmits the sensing information to the alarm emission device (230); wherein a plurality of pressure sensors (220-1 to 220-n) are installed in a pressure relief valve (550, 560) to safely discharge internal pressure to the outside when pressure rises, and the plurality of pressure sensors (220-1 to 220-n) have three or more contacts to enable an alarm configuration by the contacts to the outside by operating the contacts step by step, and the plurality of pressure sensors (220-1 to 220-n) include a display unit (340) that outputs a setting menu to display the pressure value or set the reference value; and wherein the plurality of pressure sensors (220-1 to 220-n) are installed in a pressure relief valve (550, 560) to discharge internal pressure to the outside when pressure rises. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 An alarm system for ensuring safety around power facilities according to claim 1, wherein the alarm emitting device (230) comprises: a communication unit (410) that receives sensing information from a plurality of pressure sensors (220-1 to 220-n); a control unit (420) that generates alarm information converted into an alarm form according to the sensing information; and an alarm output unit (430) that outputs the alarm information. Claim 6 In claim 5, the alarm output unit (430) is characterized by having a size for transmitting the alarm information, thereby providing an alarm system for ensuring safety around power facilities. Claim 7 ◈Claim 7 was abandoned upon payment of the registration fee.◈ An alarm system for ensuring safety around power facilities according to Claim 1, wherein the alarm emitting device (230) has a magnetic attachment frame form that is movably detachable and attached to the top or side of the power facility. Claim 8 ◈Claim 8 was abandoned upon payment of the registration fee.◈ An alarm system for ensuring safety around power facilities according to Claim 1, wherein the alarm emitting device (230) is installed in pairs on each of the plurality of pressure sensors (220-1 to 220-n) or is installed in units of a number of pre-grouped units among the plurality of pressure sensors (220-1 to 220-n). Claim 9 ◈Claim 9 was abandoned upon payment of the registration fee.◈ An alarm system for ensuring safety around power facilities according to Claim 1, characterized in that a plurality of the above-mentioned power facilities (211-1 to 211-n) are Gas-insulated Switchgear (GIS). Claim 10 (a) a step of generating sensing information by sensing pressure fluctuations of a plurality of power equipment (211-1 to 211-n) disposed in a power equipment room (210) using a plurality of pressure sensors (220-1 to 220-n); and (b) a step of an alarm emitting device (230) outputting alarm information according to the sensing information obtained from the plurality of pressure sensors (220-1 to 220-n); wherein the sensing information has a step-by-step alarm transmission signal according to the magnitude of the pressure fluctuation, and the step (a) comprises: (a-1) a step in which a sensing unit (310) senses the internal pressure of a plurality of power equipment (211-1 to 211-n) and calculates a pressure value; (a-2) a step in which a microcomputer (320) compares the pressure value with a preset reference value and generates sensing information having a step-by-step alarm transmission signal according to the comparison result; and (a-3) a step in which a communication unit (330) transmits the sensing information to the alarm emission device (230); wherein a plurality of pressure sensors (220-1 to 220-n) are installed in a pressure relief valve (550, 560) to safely discharge internal pressure to the outside when pressure rises, and the plurality of pressure sensors (220-1 to 220-n) have three or more contacts so that the contacts can be operated step by step to enable an alarm configuration by the contacts to the outside, and the step (a-1) includes a step of outputting a setting menu to display the pressure value on a display unit (340) or to set the reference value; and wherein a plurality of pressure sensors (220-1 to 220-n) are installed in a pressure relief valve (550, 560) to discharge internal pressure to the outside when pressure rises, characterized in that the alarm method for ensuring safety around power equipment. Claim 11 delete Claim 12 delete Claim 13 delete Claim 14 In claim 10, the above step (b) comprises: a step in which a communication unit (410) receives sensing information from a plurality of pressure sensors (220-1 to 220-n); a step in which a control unit (420) generates alarm information that is converted into an alarm form according to the sensing information; and a step in which an alarm output unit (430) outputs the alarm information; characterized in that it is an alarm method for ensuring safety around power facilities.

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