KR102535023B1 - Air purification system for substation - Google Patents

Abstract

The present invention relates to an air purification system in a substation, and more particularly, even if SF6 gas leaks from a gas insulated switchgear (GIS) of a substation, its diffusion into the air within the substation is prevented, and emission into the atmosphere is also prevented. The present invention relates to an air purification system of a substation that can improve the functionality and efficiency of an air purification function in a substation and help prevent global warming through suppression of greenhouse gas emissions. is composed of a GIS airtight chamber, a constant temperature and humidity device, an air circulation device, a gas leak detection sensor, a GIS gas leak monitoring/control unit, and an air purification unit, and the air circulation device includes an air chamber, a first pump, an exhaust pipe, and a second pump , a supply pipe, a cooler, a temperature sensor, and a cooler control unit.

Description

Air purification system for substation}

The present invention relates to an air purification system of a substation in the field of substation technology, and more particularly, even if SF6 gas leaks from a gas insulated switchgear (GIS) of a substation, its diffusion into the air within the substation is prevented, and at the same time, it is released into the atmosphere. The present invention relates to an air purification system of a substation that can help prevent global warming through suppression of greenhouse gas emissions while improving the functionality and efficiency of an air purification function in a substation by preventing the emission of the substation.

A substation is a facility for changing the nature of voltage or current in the process of supplying power generated by a power plant to a load through a transmission line or distribution line, and accommodates facilities such as various power cables, transformers, and insulated switchgear.

As such, various facilities are installed in substations, and since these facilities can cause abnormal operation due to humidity, temperature, etc., the air purification (conditioning) system that keeps the air in the substation in a suitable state plays an important role in stable power supply. do.

Meanwhile, in most substations, especially indoor substations, a gas insulated switchgear (GIS, hereinafter referred to as “GIS”) is installed to perform functions such as monitoring, control, protection, and measurement of the power system while operating conditions. It properly protects the system by safely opening and closing the lines not only in normal conditions but also in abnormal conditions such as accidents and short circuits.

To explain further, GIS is a switching facility in which switching facilities such as circuit breakers and disconnectors, transformers, arresters, and main circuit busses are collectively housed in a metal tank. At this time, the inside of the metal tank is filled and sealed with SF6 (sulfur hexafluoride) gas and compressed air, which have excellent insulation performance and extinguishing ability, as an insulating medium.

However, the SF6 gas is designated as one of the six major greenhouse gases, and therefore, in accordance with the severity of global warming, regulations and replacement efforts for the use of SF6 gas continue, but the excellent insulation performance and inertness, colorless, Due to its eco-friendly characteristics such as odorless, non-toxic and flame retardant, it is difficult to find a gas that can replace it, and for this reason, SF6 gas is still commonly used in GIS.

Accordingly, at present, it is best to prevent SF6 gas from leaking from the GIS. Fortunately, the GIS has a structure in which the filling part of the SF6 gas is sealed and stored, so that the leakage of SF6 gas is suppressed as much as possible. According to the SF6 gas leakage phenomenon was to occur. In addition, since there is a limit to immediately identifying and coping with leaks of SF6 gas by GIS at an aging stage, there is also a large aspect of cost consumption due to preemptive replacement of an aging GIS to a certain level. In addition, there is always a possibility that SF6 gas leaks even in a non-aged GIS due to a defect in the GIS manufacturing process.

And SF6 gas is a colorless and odorless gas that is 6 times heavier than air, and due to this characteristic, when leaked, it sinks to the floor. there is a risk of As a countermeasure technique for this, Korea Patent Registration No. 10-1556604, “a device for detecting leaked gas in an indoor substation GIS,” has been proposed.

Accordingly, the present applicant proposes the present invention as an air purification technology in a substation that can effectively cope with SF6 gas leakage in a substation gas insulated switchgear (GIS) and at the same time help prevent global warming by suppressing greenhouse gas emissions in the process. came to suggest

Korean Patent Registration No. 10-1958297 (Announced on March 15, 2019), “Air Conditioning System for Substations” Korean Patent Registration No. 10-1553844 (2015.09.17. Announcement.), “A device for purifying steam gas when vacuuming GIS in an indoor substation” Korean Patent Registration No. 10-1556604 (Announced on October 5, 2015), “Leak gas detection device of indoor substation GIS”

In an embodiment of the present invention, even if SF6 gas leaks from the GIS of a substation, its diffusion into the air within the substation is prevented and its discharge into the atmosphere is also prevented, thereby improving the functionality and efficiency of the air purification function in the substation. It helps to prevent global warming by suppressing greenhouse gas emissions, and in this process, whether or not SF6 gas leaks in GIS is automatically monitored periodically. Substation air purification systems are provided that can be taken.

In addition, as the substation manager is notified of the limit time until insulation breakdown of the GIS derived based on the amount of leakage of SF6 gas, the substation manager refers to the limit time until GIS insulation breakdown while maintaining/ Provided is an air purification system of a substation that allows maintenance work such as maintenance or replacement to be performed in a more planned and detailed manner.

In addition, even if SF6 gas leaks from the GIS of the substation, its diffusion into the air within the substation is prevented, so that the risk of safety accidents due to the lack of oxygen of the manager working near the GIS of the substation can be prevented in advance Provides an air purification system for substations that

In addition, as the air purification work in the substation proceeds in a complementary manner through a fixed air purifier and an autonomous mobile air purifier including an autonomous vehicle, the air purifying performance of the substation can be greatly improved. Provides an air purification system for substations that

An air purification system of a substation according to an embodiment of the present invention is installed in the substation to seal a gas insulated switchgear (GIS) of the substation, and at the same time, at least a part of the side surface is formed of a transparent material, and a GIS airtight room having an entrance door and A constant temperature and humidity device for maintaining the inside of the GIS sealed room at a preset temperature and humidity so that the temperature and humidity in the GIS sealed room are maintained in optimal conditions for the operation of the GIS; An air circulation device installed in the substation in a form capable of external circulation without being released into the atmosphere in the substation, a gas leak detection sensor installed in the GIS closed room to detect leakage of SF6 gas from the GIS, and the gas Based on the detection signal of the leak detection sensor, the operation of the constant temperature and humidity device and the air circulation device are controlled, and the information on the SF6 gas leak of the GIS (hereinafter referred to as “gas leak notification signal”) is sent to the management server of the substation. It may include a GIS gas leak monitoring/control unit that transmits gas, and an air purifier that manages air quality for the rest of the space except for the GIS closed room in the substation.

In addition, the air circulation device includes an air chamber in which air to be supplied to the GIS closed room is stored, a first pump for discharging air in the GIS closed room to the air chamber, and the GIS closed room and the air chamber. At the same time, an exhaust pipe for transporting air inside the GIS closed room to the air chamber according to the operation of the first pump, a second pump for supplying air in the air chamber to the GIS closed room, the air chamber, and A supply pipe that connects the GIS closed chamber and transports the air in the air chamber to the GIS closed chamber according to the operation of the second pump, and is installed on the supply pipe to perform a cooling function for the air supplied to the GIS closed chamber, , a cooler including a refrigerant tank, a temperature sensor installed in the air chamber, and a cooler control unit controlling an operation of the cooler based on a signal from the temperature sensor.

In addition, the GIS gas leak monitoring/control unit stops the operation of the constant temperature and humidity device, operates the air circulation device, and generates the gas leak notification signal when the SF6 gas leak signal of the GIS is transmitted from the gas leak detection sensor and transmits it to the management server, calculates the amount of SF6 gas leakage of the GIS per preset unit time, calculates the limit time until insulation breakdown due to the SF6 gas leak of the GIS based on this, and then calculates the limit time The gas leakage notification signal may be generated to be included and transmitted to the management server.

According to an embodiment of the present invention, even if SF6 gas leaks from the GIS of a substation, its diffusion into the air within the substation is prevented and its discharge into the atmosphere is also prevented, improving the functionality and efficiency of the air purification function in the substation At the same time, it helps to prevent global warming through the suppression of greenhouse gas emissions. In this process, whether or not SF6 gas leaks in GIS is periodically and automatically monitored. action can be taken.

In addition, as the substation manager is notified of the limit time until insulation breakdown of the GIS derived based on the amount of leakage of SF6 gas, the substation manager refers to the limit time until GIS insulation breakdown while maintaining/ Maintenance work such as maintenance or replacement can be performed more plannedly and in detail.

In addition, even if SF6 gas leaks from the GIS of the substation, its diffusion into the air in the substation is prevented, so the risk of safety accidents due to lack of oxygen of the manager working near the GIS of the substation can be prevented in advance. .

In addition, as the air purification work in the substation proceeds in a complementary manner through a fixed air purifier and an autonomous mobile air purifier including an autonomous vehicle, the air purifying performance of the substation can be greatly improved. do.

1 is a configuration diagram illustrating an air purification system of a substation according to an embodiment of the present invention
2 is a block diagram illustrating an air purification system of a substation according to an embodiment of the present invention.
3 is a flowchart illustrating an embodiment of a control operation of a GIS gas leak monitoring/control unit in an air purification system of a substation according to an embodiment of the present invention.
4 is a block diagram illustrating a mobile air purifying device of an air purifying unit in an air purifying system of a substation according to an embodiment of the present invention.

The detailed description of the present invention below refers to the accompanying drawings shown as examples of embodiments in which the present invention can be practiced. These embodiments are described in detail so that those skilled in the art will be able to practice the present invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in one embodiment in another embodiment without departing from the spirit and scope of the invention. Additionally, it should be understood that the location or arrangement of individual components within each described embodiment may be changed without departing from the spirit and scope of the invention.

Accordingly, the detailed description set forth below is not to be taken in a limiting sense, and the scope of the present invention, if properly described, is limited only by the appended claims, along with all equivalents as claimed by those claims. Like reference numbers in the drawings indicate the same or similar function throughout the various aspects.

The terms used in the present invention have been selected from general terms that are currently widely used as much as possible while considering the functions in the present invention, but these may vary depending on the intention of a person skilled in the art or precedent, the emergence of new technologies, and the like. In addition, in a specific case, there is also a term arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the description of the invention. Therefore, the term used in the present invention should be defined based on the meaning of the term and the overall content of the present invention, not simply the name of the term.

In the invention, when a certain part “includes” a certain component in the whole, this means that it may further include other components, rather than excluding other components, unless otherwise stated. In addition, as described in the specification, "... wealth", "… A term such as “module” refers to a unit that processes at least one function or operation, which may be implemented as hardware or software or a combination of hardware and software.

An air purification system of a substation according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4 .

1 is a block diagram illustrating an air purification system of a substation according to an embodiment of the present invention, FIG. 2 is a block diagram illustrating an air purification system of a substation according to an embodiment of the present invention, and FIG. A flow chart illustrating an embodiment of a control operation of a GIS gas leak monitoring/control unit in a substation air purification system according to an embodiment of the present invention, and FIG. 4 is a substation air purification system according to an embodiment of the present invention It is a block configuration diagram illustrating a mobile air purifying device of the air purifying unit in .

As shown, the air purification system of a substation according to an embodiment of the present invention includes a GIS closed room 100, a constant temperature and humidity device 200, an air circulation device 300, a gas leak detection sensor 400, and a GIS gas It is configured to include a leak monitoring/control unit 500 and an air purifying unit 600.

The GIS closed room 100 is installed in the substation 10 to seal the GIS (Gas Insulated Switchgear, 11) of the substation 10, and this GIS sealed room 100 has a door 110 for entry. And, at least a part of the side surface of the GIS closed room 100 is formed of a transparent material.

The constant temperature and humidity device 200 has a function of maintaining the inside of the GIS closed room 100 at a preset temperature and humidity so that the temperature and humidity inside the GIS closed room 100 are maintained in optimal conditions for the operation of the GIS 11. carry out

The air circulator 300 is installed in the substation 10 in a form capable of externally circulating the air inside the GIS closed room 100 without releasing it into the atmosphere in the substation 10.

And this air circulation device 300 includes an air chamber 310, a first pump 320, an exhaust pipe 330, a second pump 340, a supply pipe 350, a cooler 360, a temperature sensor 370, and It may be configured to include a cooler control unit 380.

The air chamber 310 stores air to be supplied to the GIS closed room 100 .

The first pump 320 is for discharging air in the GIS closed chamber 100 to the air chamber 310 .

The exhaust pipe 330 connects the GIS closed chamber 100 and the air chamber 310 and at the same time transfers the air inside the GIS closed chamber 100 to the air chamber 310 according to the operation of the first pump 320. am.

The second pump 340 is used to supply air in the air chamber 310 to the GIS closed room 100 .

The supply pipe 350 connects the air chamber 310 and the GIS closed room 100 and at the same time transfers the air in the air chamber 310 to the GIS closed room 100 according to the operation of the second pump 340. .

The cooler 360 is installed on the supply pipe 350 to perform a cooling function for the air supplied to the GIS closed room 100, and the cooler 360 includes a refrigerant tank 361.

The temperature sensor 370 is installed in the air chamber 310 and is used to sense the internal temperature of the air chamber 310 .

The control unit 380 controls the operation of the cooler 360 based on a signal from the temperature sensor 370 .

The gas leak detection sensor 400 is installed in the GIS closed room 100 to detect leakage of SF6 gas from the GIS 11.

The GIS gas leak monitoring/control unit 500 controls the operation of the constant temperature and humidity device 200 and the air circulation device 300 based on the detection signal of the gas leak detection sensor 400, and the SF6 gas leak of the GIS 11 It performs a function of transmitting information (hereinafter referred to as “gas leak notification signal”) to the management server 12 of the substation 10.

In addition, the GIS gas leak monitoring/control unit 500 stops the operation of the constant temperature and humidity device 200 and turns on the air circulation device 300 when the SF6 gas leak signal of the GIS 11 is transmitted from the gas leak detection sensor 400. It operates, generates a gas leak notification signal, and transmits it to the management server 12. At this time, the GIS gas leakage monitoring/control unit 500 calculates the amount of SF6 gas leakage of the GIS 11 per preset unit time, and calculates the limit time until insulation breakdown due to the SF6 gas leakage of the GIS 11 based on this calculation Then, the gas leak notification signal may be generated and transmitted to the management server 12 so that the calculated limit time is included.

Referring to FIG. 3 , the GIS gas leak monitoring/control unit 500 monitors whether or not the SF6 gas leak signal of the GIS 11 is transmitted from the gas leak detection sensor 400 in step S110. Subsequently, in step S120, as the SF6 gas leakage signal of the GIS 11 is transmitted through step S110, the operation of the constant temperature and humidity device 200 is stopped. Subsequently, in step S130, the air circulator 300 is operated. Subsequently, in step S140, an amount of SF6 gas leakage from the GIS 11 per preset unit time is calculated. Subsequently, in step S150, a limit time until insulation breakdown due to leakage of SF6 gas in the GIS 11 is calculated based on the amount of leakage of the SF6 gas in the GIS 11 calculated in step S140. Subsequently, in step S160, a gas leakage notification signal including the limit time calculated through step S150 is generated. Subsequently, in step 170, the gas leakage notification signal generated in step S160 is transmitted to the management server 12 of the substation 10.

Referring back to FIGS. 1 to 4 , the air purifier 600 performs a function of managing air quality for the remaining space except for the GIS closed room 100 in the substation 10 .

In addition, the air purifying unit 600 may include a fixed air purifying device 610 fixedly installed in the substation 10 and a mobile air purifying device 620 performing an air purifying function while moving within the substation 10. .

The mobile air purifying device 620 may include an air measuring unit 621 and a movable air purifying unit 622 .

The air measuring means 621 is a plurality of components distributedly installed in the substation 10, and each of these air measuring means 621 periodically measures the measured value of the air measuring device 621a and the air measuring device 621a as an external reception target. It may be configured to include a control module 621b for transmission to and the wireless communication module 621c (hereinafter referred to as “first wireless communication module”).

The mobile air purifier 622 may include an autonomous vehicle 622a, an air purifier 622b, a second wireless communication module 622c, and a main controller 622d.

The self-driving vehicle 622a is configured to autonomously drive along the bottom surface of the substation 10 .

The air purifier 622b is installed in the autonomous vehicle 622a and performs an air purifying function.

The second wireless communication module 622c is installed in the self-driving vehicle 622a, and the second wireless communication module 622c transmits the measured value for each air measuring device 621a to the first wireless communication of the corresponding air measuring unit 621. It performs the function of receiving from module 621.

The main control unit 622d is installed in the self-driving vehicle 622a, and the air quality threshold for controlling the operation of the air purifier 622b is pre-set in the main control unit 622d and is transmitted from the second wireless communication module 622c. If the measured value of the transmitted air measuring device 621a is a contamination level exceeding the air quality threshold, the autonomous vehicle 622a is driven to the area where the corresponding air measuring means 621 is located, and then the air purifier 622b is installed. function to make it work.

Here, the coordinate information in the substation 10 of the corresponding air measuring means 621 is stored in the control module 621b for each air measuring means 621, and the coordinate information is included in the measured value transmitted when the measured value of the air measuring device 621a is transmitted. , and the main control unit 622d detects the coordinate information from the measurement value transmitted from the second wireless communication module 622c and then sends the autonomous driving information based on the detected coordinate information to the autonomous vehicle 622a. may be providing

With the above-described configuration, even if SF6 gas leaks from the GIS of the substation, its diffusion into the air within the substation is prevented, and emission into the atmosphere is also prevented, thereby improving the functionality and efficiency of the air purification function in the substation. It helps to prevent global warming by suppressing greenhouse gas emissions, and in this process, whether or not SF6 gas leaks in GIS is automatically monitored periodically. can be taken

In addition, as the substation manager is notified of the limit time until insulation breakdown of the GIS derived based on the amount of leakage of SF6 gas, the substation manager refers to the provided GIS limit time until insulation breakdown and uses the corresponding GIS It is possible to perform management tasks such as maintenance/repair or replacement in a more planned and detailed manner.

In addition, as described above, even if SF6 gas leaks from the GIS of the substation, its diffusion into the air within the substation is prevented, so the risk of safety accidents due to the lack of oxygen of the manager working near the GIS of the substation is prevented. will be prevented

In addition, as the air purification work in the substation proceeds in a complementary manner through a fixed air purifier and an autonomous mobile air purifier including an autonomous vehicle, the air purifying performance of the substation can be greatly improved. do.

As described above, in the present description, specific details such as specific components and limited embodiments and drawings have been described, but this is only provided to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. No, and those skilled in the art can make various modifications and variations from these descriptions.

Therefore, the spirit of the present invention should not be limited to the described embodiments and should not be defined, and all things that have modifications equivalent or equivalent to these claims as well as the claims described below will fall within the scope of the spirit of the present invention.

10: Substation 11: GIS
12: management server 100: GIS closed room
110: door 200: constant temperature and humidity device
300: air circulation device 310: air chamber
320: first pump 330: exhaust pipe
340: second pump 350: supply pipe
360: cooler 370: temperature sensor
380: cooler control unit 400: gas leak detection sensor
500: GIS gas leak monitoring/control unit 600: air circulation unit
610: fixed air purifier 620: mobile air purifier
621: air measuring means 621a: air meter
621b: control module 621c: first wireless communication module
622: mobile air purification means 622a: autonomous vehicle
622b: air purifier 622c: second wireless communication module
622d: main fisherman

Claims (2)

Installed in the substation 10 to seal the GIS (Gas insulated Switchgear, 11) of the substation 10, and at the same time, at least a part of the side surface is formed of a transparent material, and has a door 110 for entry GIS closed room 100 :
A constant temperature and humidity device 200 for maintaining the inside of the GIS closed room 100 at a preset temperature and humidity so that the temperature and humidity inside the GIS closed room 100 are maintained in conditions for the operation of the GIS 11:
An air circulation device 300 installed in the substation 10 in a form capable of externally circulating the air inside the GIS closed room 100 without releasing it into the atmosphere in the substation 10:
A gas leak detection sensor 400 installed in the GIS closed room 100 to detect leakage of SF6 gas from the GIS 11:
Based on the detection signal of the gas leak detection sensor 400, the operation of the constant temperature and humidity device 200 and the air circulation device 300 is controlled, and information on the SF6 gas leak of the GIS 11 (hereinafter referred to as “gas A GIS gas leak monitoring/control unit 500 for transmitting a "leak notification signal") to the management server 12 of the substation 10: and
Including an air purifier 600 for managing air quality for the remaining space except for the GIS closed room 100 in the substation 10,
The air circulation device 300 includes an air chamber 310 in which air to be supplied to the GIS closed room 100 is stored; a first pump 320 for discharging air in the GIS closed chamber 100 to the air chamber 310; An exhaust pipe that connects the GIS closed room 100 and the air chamber 310 and transfers the air inside the GIS closed room 100 to the air chamber 310 according to the operation of the first pump 320 ( 330) and; a second pump 340 for supplying air in the air chamber 310 to the GIS closed chamber 100; A supply pipe 350 that connects the air chamber 310 and the GIS closed chamber 100 and transfers the air in the air chamber 310 to the GIS closed chamber 100 according to the operation of the second pump 340. )class; a cooler 360 installed on the supply pipe 350 to perform a cooling function for the air supplied to the GIS closed room 100 and including a refrigerant tank 361; a temperature sensor 370 installed in the air chamber 310; And a cooler control unit 380 for controlling the operation of the cooler 360 based on the signal of the temperature sensor 370,
When the SF6 gas leak signal of the GIS 11 is transmitted from the gas leak detection sensor 400, the GIS gas leak monitoring/control unit 500 stops the operation of the constant temperature and humidity device 200 and the air circulation device 300 is operated to generate the gas leak notification signal and transmit it to the management server 12, calculate the amount of SF6 gas leakage of the GIS 11 per preset unit time, and based on this calculate the GIS 11 After calculating the limit time until insulation breakdown due to the SF6 gas leak, the gas leak notification signal is generated and transmitted to the management server 12 so that the calculated limit time is included. Substation air purification system .
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