Intelligent detection system for SF6 gas leakage of box-type substation

Abstract

The utility model discloses a box-type transformer station SF6 gas leakage intelligent detection system comprising a remote monitoring center, a distributed control system (DCS), an SF6 gas detector, an alarm device, a blower fan, a terminal, and an LED large screen, the DCS respectively controls the SF6 gas detector, the terminal, the alarm device, and the blower fan control device, and data monitored by the DCS is transmitted to the remote control center. The LED large screen is used for displaying monitored real-time data, and the terminal comprises a computer and a mobile terminal. The system can accurately detect the concentration of SF6 gas in a station, and can effectively avoid damage to an insulating part and harm to a human body caused by SF6 gas leakage or too high concentration.

Description

Technical Field

[0001] This utility model belongs to the field of SF6 gas detection technology, specifically referring to an intelligent detection system for SF6 gas leakage in prefabricated substations. Background Technology

[0002] SF6 gas circuit breakers have advantages such as high breaking capacity, long electrical life, high breaking voltage, simple structure, and low maintenance. They are increasingly widely used in the railway power sector.

[0003] However, during operation, SF6 gas circuit breakers inevitably experience SF6 gas leakage from the electrical equipment, leading to a decrease in density. Simultaneously, external moisture can also penetrate the equipment, increasing the water content within the SF6 gas. Excessive water content in the SF6 gas poses safety hazards to high-voltage electrical equipment. This is primarily because the decomposition products of SF6 gas under electric arc conditions react chemically with water to produce highly corrosive HF and H2O3, which corrode and damage insulation components. These substances leak out along with the SF6 gas, endangering human health and creating safety risks. Therefore, the safe use of SF6 gas circuit breakers has always been a top priority in inspection work.

[0004] In current inspection processes, SF6 detectors are usually manually used. Before testing, ventilation is usually required for 10 minutes to prevent the leakage of gas from harming people. However, this can lead to inaccurate test data. If the test is conducted directly without ventilation, the leaked SF6 gas may harm people. Utility Model Content

[0005] The purpose of this invention is to provide an intelligent detection system for SF6 gas leakage in a prefabricated substation. This system can accurately detect the concentration of SF6 gas in the substation and can effectively prevent SF6 gas leakage or excessive concentration from damaging insulation components and causing harm to the human body.

[0006] To achieve the above objectives, this utility model provides an intelligent detection system for SF6 gas leakage in a prefabricated substation, comprising a remote monitoring center, a distributed control system (DCS), an SF6 gas detector, an alarm device, a fan, a terminal, and an LED screen. The DCS controls the SF6 gas detector, the terminal, the alarm device, and the fan control device. Data monitored by the DCS is transmitted to the remote control center. The LED screen displays the real-time data monitored. The terminal includes a computer and a mobile terminal.

[0007] As a further embodiment of this utility model: the SF6 gas detector includes a main unit, a detector, an audible and visual alarm light, a 5G network transmission module, and an LCD screen. The detector is located at the lower end of the SF6 gas detector and includes a gas sensing hole and a sensor. The LCD screen is located in the middle of the SF6 gas detector, and the main unit is behind the LCD screen. The right end of the SF6 gas detector is connected to the audible and visual alarm, and the left end is connected to the 5G network transmission module. The 5G network transmission module has a communication card inside. The SF6 gas detector also includes a power supply system, which uses an explosion-proof 12V-24V DC power supply.

[0008] As a further embodiment of this invention: the output signal of the SF6 gas detector adopts a three-wire 4-20mA or a four-wire RS485 standard signal output.

[0009] As a further embodiment of this utility model: the 5G network transmission module simultaneously supports 5G NSA and SA modes, is backward compatible with 4G / 3G, and supports network architectures Option 3X, 3a and Option 2.

[0010] As a further aspect of this invention: the SF6 gas detector adopts a two-level alarm method, which activates the first-level alarm when the SF6 gas concentration exceeds 5 ppm and the second-level alarm when it exceeds 10 ppm.

[0011] As a further embodiment of this utility model: the SF6 gas detector is a fixed gas concentration detector, installed below the box-type substation, 30-60 cm above the ground.

[0012] Compared with existing technologies, this invention uses an SF6 gas detector to detect the SF6 gas concentration in a prefabricated substation and outputs a signal to upload the information to the DCS (Distributed Control System). The DCS then transmits the monitored data to a remote control center and displays real-time data on an LED screen. If the SF6 gas detector detects an SF6 gas concentration exceeding 5 ppm, an audible and visual alarm is activated, and the alarm device controlled by the DSC (Distributed Control System) issues an alarm message, controlling the fans in the prefabricated substation to start. The LED screen simultaneously displays the alarm information, and the 5G network transmission module sends the alarm information to the mobile terminals of inspection personnel. This system can accurately detect the SF6 gas concentration in the substation and effectively prevent SF6 gas leaks or excessively high concentrations from damaging insulation components and causing harm to personnel. Attached Figure Description

[0013] Figure 1 This is a structural framework diagram of the intelligent detection system for SF6 gas leakage in a prefabricated substation.

[0014] Figure 2This is a schematic diagram of the SF6 gas detector of this utility model.

[0015] In the picture: 1. Audible and visual alarm light, 2. Detector, 3. 5G network transmission module, 4. LCD screen. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] The intelligent detection system for SF6 gas leaks in a prefabricated substation includes a remote monitoring center, a distributed control system (DCS), SF6 gas detectors, alarm devices, fans, terminals, and an LED screen. The DCS controls the SF6 gas detectors, terminals, alarm devices, and fan control devices. Data monitored by the DCS is transmitted to the remote control center. The LED screen displays the real-time data. Terminals include computers and mobile terminals.

[0018] The SF6 gas detector includes a main unit, detector 2, audible and visual alarm light 1, 5G network transmission module 3, and LCD display 4. Detector 2 is located at the bottom of the SF6 gas detector and includes a gas sensing hole and a sensor. LCD display 4 is located in the middle of the SF6 gas detector and is used to display the concentration value of SF6 gas. It can detect SF6 gas concentrations from 0 to 50 ppm. Behind LCD display 4 is the main unit, which is the control and data processing center of the SF6 gas detector. It is responsible for receiving, processing, and displaying the signals transmitted by the detector. The right end of the SF6 gas detector is connected to the audible and visual alarm light 1, and the left end is connected to the 5G network transmission module 3. The 5G network transmission module 3 has a communication card inside, which can communicate wirelessly with external mobile terminals. The SF6 gas detector also includes a power supply system, which uses an explosion-proof 12V-24V DC power supply.

[0019] The SF6 gas detector outputs a three-wire 4-20mA or four-wire RS485 standard signal, which has long-distance data transmission capability and can be seamlessly connected with DCS.

[0020] The 5G network transmission module 3 supports both 5G NSA and SA modes, is backward compatible with 4G / 3G, and supports network architectures such as Option 3X, 3a, and Option 2.

[0021] The SF6 gas detector uses a two-level alarm system. The first-level alarm is activated when the SF6 gas concentration exceeds 5 ppm, and the second-level alarm is activated when the concentration exceeds 10 ppm.

[0022] The SF6 gas detector is a fixed gas concentration detector capable of detecting leaked SF6 gas and is easy to install and remove. Because the density of SF6 gas is much greater than that of air, the SF6 gas detector is installed below the prefabricated substation, 30-60 cm above the ground.

[0023] The working process of this utility model is as follows: An SF6 gas detector measures the SF6 gas concentration within the prefabricated substation. The detector's LCD screen 4 displays real-time SF6 gas concentration data, and the output signal uploads the information to the DCS (Distributed Control System). The DCS transmits the monitored data to the remote control center and displays the real-time data on an LED screen. If the SF6 gas detector detects an SF6 gas concentration exceeding 5 ppm, an audible and visual alarm is activated. Simultaneously, the alarm device controlled by the DSC (Distributed Control System) issues an alarm message, controls the ventilation fans within the prefabricated substation to start, and displays the alarm information on the LED screen. Simultaneously, the 5G network transmission module 3 sends the alarm information to the mobile terminal of the inspection personnel. After the SF6 gas concentration within the substation drops to a safe range, the inspection personnel perform maintenance on the SF6 gas circuit breaker. This system can accurately detect the SF6 gas concentration within the substation and effectively prevent SF6 gas leakage or excessive concentration from damaging insulation components and causing harm to personnel.

Claims

1. An intelligent detection system for SF6 gas leakage in a prefabricated substation, characterized in that, It includes a remote monitoring center, DCS, SF6 gas detector, alarm equipment, fan, terminal, and LED screen. The DCS controls the SF6 gas detector, terminal, alarm equipment, and fan control device. The data monitored by the DCS is transmitted to the remote control center. The LED screen is used to display the monitored real-time data. The terminals include computers and mobile terminals. The SF6 gas detector includes a host, a detector (2), an audible and visual alarm light (1), a 5G network transmission module (3), and an LCD screen (4). The detector (2) is located at the lower end of the SF6 gas detector and includes a gas sensing hole and a sensor. The LCD screen (4) is located in the middle of the SF6 gas detector. The host is behind the LCD screen (4). The right end of the SF6 gas detector is connected to the audible and visual alarm light (1), and the left end is connected to the 5G network transmission module (3). The 5G network transmission module (3) has a communication card inside. The SF6 gas detector also includes a power supply system, which is powered by an explosion-proof 12V-24V DC power supply. The SF6 gas detector is a fixed gas concentration detector, installed below the box-type substation, 30-60 cm above the ground.

2. The intelligent detection system for SF6 gas leakage in a prefabricated substation according to claim 1, characterized in that, The SF6 gas detector outputs a three-wire 4-20mA or four-wire RS485 standard signal.

3. The intelligent detection system for SF6 gas leakage in a prefabricated substation according to claim 1, characterized in that, The 5G network transmission module (3) supports both 5G NSA and SA modes, is backward compatible with 4G / 3G, and supports network architectures Option 3X, 3a and Option 2.

4. The intelligent detection system for SF6 gas leakage in a prefabricated substation according to claim 1, characterized in that, The SF6 gas detector uses a two-level alarm system. The first-level alarm is activated when the SF6 gas concentration exceeds 5 ppm, and the second-level alarm is activated when the concentration exceeds 10 ppm.

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