CN110717081A - A Mobile SF6 Automatic Recovery System Based on GIS Equipment Fault Leakage Source Location - Google Patents

Abstract

The invention discloses a mobile SF ₆ automatic recovery system based on GIS equipment fault leakage source location, including a GIS indoor SF ₆ gas monitoring subsystem, a data transmission subsystem, an intelligent management platform and a mobile SF ₆ recovery subsystem. The monitoring subsystem includes infrared light sensor and quantum cascade laser sensor, which are used to collect the SF ₆ gas concentration in various places in the GIS room in real time, and transmit the measurement information to the intelligent management platform through the data transmission subsystem, and the intelligent analysis unit analyzes the monitoring subsystem in real time. The collected SF ₆ concentration data is used to determine whether a leak has occurred. The mobile SF ₆ recovery subsystem is used to achieve efficient and fast recovery of leaked SF ₆ .

Description

A Mobile SF6 Automatic Recovery System Based on GIS Equipment Fault Leakage Source Location

technical field

The invention belongs to the field of on-line monitoring of high-voltage equipment in a power system, and in particular relates to an SF ₆ automatic recovery system based on GIS equipment fault leakage source location.

Background technique

Fully enclosed combined electrical appliances (GIS) using SF ₆ gas as the insulating medium are widely used due to their advantages of good insulation performance, small footprint and space, safe and reliable operation, etc. The reason is small hole leakage or pipeline leakage, which leads to the leakage of SF ₆ gas. It should be pointed out that SF ₆ is a suffocating agent, and its specific gravity is larger than that of air. If there is leakage, it will gather in low-lying places on the ground. If the GIS equipment operation and maintenance personnel are exposed to an environment with an oxygen content of <19.5%, dizziness, vomiting, and coma will occur. Other symptoms, even loss of consciousness and death. The national standard GB/T 8905-2012 clearly stipulates that "the content of SF ₆ gas in the working environment should be lower than 1 000ppm". In addition, factors such as high voltage discharge and high temperature may lead to the decomposition of _SF6 , and its decomposition products are seriously corrosive and toxic; it cannot be ignored that _SF6 is also one of the six major greenhouse gases, and its global warming potential (GWP) ) up to 23 900; SF ₆ is an expensive gas, and frequent gas supply for equipment due to leakage will also increase operating costs. All in all, SF ₆ gas leakage not only poses a great threat to the personal safety of equipment maintenance personnel, but also has a negative impact on the environment. Therefore, an automatic recovery device for leaked SF ₆ gas needs to be installed indoors in the GIS station.

Considering the large space of the GIS room and the strong randomness of the location of the SF ₆ leakage fault, it is necessary to quickly locate the leakage source after the leakage fault occurs, and adjust the layout of the SF ₆ recovery device in real time to achieve rapid SF ₆ leakage. recycling, so as to ensure the personal safety of workers and the safety of the environment.

In view of the above problems, the purpose of the present invention is to provide a SF ₆ automatic recovery system based on GIS equipment fault leakage source location, which can realize real-time monitoring of SF ₆ concentration in GIS room, fault leakage source location and rapid recovery of leaked SF ₆ .

SUMMARY OF THE INVENTION

In order to achieve the above object, the present invention adopts the following technical solutions: a mobile SF ₆ automatic recovery system based on GIS equipment fault leakage source location, is characterized in that: including GIS indoor SF ₆ gas monitoring subsystem, data transmission subsystem, intelligent management platform and mobile SF ₆ recycling subsystem;

The SF ₆ gas monitoring subsystem in the GIS indoors includes an infrared light sensor and a quantum cascade laser sensor _; the infrared light sensor and the quantum cascade laser sensor are used to collect the SF gas concentration everywhere in the GIS room in real time, and transmit the measurement information via The data transmission subsystem is transmitted to the intelligent management platform;

The data transmission subsystem is used to realize the information communication between the GIS indoor SF ₆ gas monitoring subsystem, the mobile SF ₆ recovery subsystem and the intelligent management platform, which includes a data transmission controller and an input/output interface; The data transmission controller is responsible for distributing and managing the direction and mode of data transmission (wired, wireless); the input/output interface is compatible with dual modes of wired transmission and wireless transmission;

The intelligent management platform includes a storage unit, an intelligent analysis unit and a system management platform; the storage unit is used to store the historical data of SF gas concentration collected by the infrared light sensor and the quantum cascade laser sensor _; the intelligent analysis unit It is used to process and analyze the SF ₆ gas concentration data; the system management platform controls the coordinated work of each part of the recovery system according to the analysis result of the intelligent analysis unit.

The mobile SF ₆ recovery subsystem is used to achieve efficient and fast recovery of leaked SF ₆ , and includes a stationary SF ₆ purification and recovery device, a movable gas collection port, a motion mechanism and a motion control unit; the purification and recovery device is used for Purification, recovery and temporary storage of leaked SF ₆ are realized; the movable gas collecting port, the motion mechanism and the motion control unit are used to improve the speed and flexibility of the recovery of leaked SF ₆ and enhance the recovery effect.

The GIS indoor SF ₆ gas monitoring subsystem includes 21 infrared light sensors and 4 quantum cascade laser sensors; the infrared light sensors are 0.1m above the ground and are arranged on both sides and bottom of the GIS pipeline, forming a 3×7 Sensor array; the quantum cascade laser sensor is 0.3m above the ground, arranged on both sides of the GIS pipeline, and the distance between the laser transmitter and the laser receiver of each quantum cascade laser sensor is 20m.

The data transmission subsystem supports wired and wireless dual transmission modes, and supports 5G transmission mode. The 5G transmission mode is used as the normal mode, and the wired transmission mode is used as the emergency backup transmission mode.

The intelligent analysis unit analyzes the SF ₆ concentration data collected by the GIS indoor SF ₆ gas monitoring subsystem in real time; when a quantum cascade laser sensor detects that the SF ₆ concentration exceeds 200% of the average detection value of the first 1-5 minutes It is determined that a large amount of SF ₆ gas leakage has occurred, otherwise it is determined that a large amount of SF ₆ gas leakage has not occurred.

The system management platform controls the mobile SF ₆ automatic recovery system based on GIS equipment fault leakage source location to work in different modes according to the SF ₆ leak determination result, and starts the SF ₆ trace leak detection and location when it is determined that a large amount of SF ₆ gas leakage has not occurred mode and GIS room operating state analysis mode, and then intelligently adjust the arrangement of the gas collection ports according to the location of trace SF ₆ leakage sources or the prediction results of leakage sources; when it is determined that a large amount of SF ₆ leakage occurs, the rapid leakage source location mode is activated immediately, and the The intelligent analysis unit completes the location of the leak source or starts the SF ₆ purification and recovery device 30s after the leak is determined;

The SF ₆ trace leakage detection mode regularly uses the sampling interval of 24h, and the sample interval is the SF ₆ concentration data of the past 2 months to analyze whether there is a trace leakage of SF ₆ , and if there is a trace leakage, the SF ₆ trace leakage source location function is activated; The GIS room operation status analysis mode regularly uses historical data to perform big data analysis, identifies abnormal system operation status, and predicts the location of possible leakage sources; the leakage source rapid location mode uses SF ₆ with a sampling interval of 1s and a sample interval of 30s. Concentration data for quick location.

The movable air collecting port is connected with the fixed SF ₆ purification and recovery device through a flexible pipe; the air collecting port is fixed with the moving mechanism; the horizontal moving range of the moving mechanism is 10m (5m in each direction), and the vertical moving distance 2m; the motion control unit receives the control information transmitted from the intelligent management platform via the data transmission subsystem, and controls the motion of the motion mechanism to drive the air collecting port to move;

The arrangement of the movable air collecting port is as follows:

(1) Each of the 4 corners of the GIS room is provided with a movable gas collection port;

(2) In the GIS room, a movable gas collection port is set at an interval of 20m on each side of the longitudinal direction of the GIS pipeline.

Beneficial effects of the invention:

Adopting the above-mentioned technical scheme, the present invention has the following technical effects:

This system can realize real-time monitoring of SF ₆ concentration in GIS indoors;

This system can realize the dual mode of 5G conventional transmission and wired emergency transmission, and actively supports the construction of ubiquitous power Internet of Things under the premise of ensuring the reliability of the system;

This system can realize the location prediction of potential SF ₆ leakage, the detection and location of trace SF ₆ leakage, and the rapid location of the fault point of a large number of SF ₆ leakage;

The system can realize the automatic, flexible and fast recovery of leaked SF ₆ , strengthen the recovery speed and effect, and reduce the risk of staff entering the faulty GIS room for operation.

Description of drawings

The accompanying drawing information of the present invention is described as follows:

Fig. 1 is the structure schematic diagram of SF ₆ automatic recovery system based on GIS equipment fault leakage source location according to the present invention;

2 is a schematic diagram of the arrangement of the gas sensors of the SF ₆ gas monitoring subsystem in the GIS indoors of the present invention;

3 is a schematic diagram of the arrangement of the gas collection ports of the mobile SF ₆ recovery subsystem of the present invention;

Fig. 4 is the flow chart of the working strategy of the intelligent management platform of the present invention;

Detailed ways:

As shown in Figure 1, the mobile SF ₆ automatic recovery system based on GIS equipment fault leakage source location of the present invention includes a GIS indoor SF ₆ gas monitoring subsystem, a data transmission subsystem, an intelligent management platform and a mobile SF ₆ recovery subsystem ;

The SF ₆ gas monitoring subsystem in the GIS indoors includes an infrared light sensor and a quantum cascade laser sensor _; the infrared light sensor and the quantum cascade laser sensor are used to collect the SF gas concentration everywhere in the GIS room in real time, and transmit the measurement information via The data transmission subsystem is transmitted to the intelligent management platform;

The data transmission subsystem is used to realize the information communication between the GIS indoor SF ₆ gas monitoring subsystem, the mobile SF ₆ recovery subsystem and the intelligent management platform, which includes a data transmission controller and an input/output interface; The data transmission controller is responsible for distributing and managing the direction and mode of data transmission (wired, wireless); the input/output interface is compatible with dual modes of wired transmission and wireless transmission;

The intelligent management platform includes a storage unit, an intelligent analysis unit and a system management platform; the storage unit is used to store the historical data of SF gas concentration collected by the infrared light sensor and the quantum cascade laser sensor _; the intelligent analysis unit It is used to process and analyze the SF ₆ gas concentration data; the system management platform controls the coordinated work of each part of the recovery system according to the analysis result of the intelligent analysis unit.

The mobile SF ₆ recovery subsystem is used to achieve efficient and fast recovery of leaked SF ₆ , and includes a stationary SF ₆ purification and recovery device, a movable gas collection port, a motion mechanism and a motion control unit; the purification and recovery device is used for Purification, recovery and temporary storage of leaked SF ₆ are realized; the movable gas collecting port, the motion mechanism and the motion control unit are used to improve the speed and flexibility of the recovery of leaked SF ₆ and enhance the recovery effect.

As shown in Figure 2, the GIS indoor SF ₆ gas monitoring subsystem includes 21 infrared light sensors and 4 quantum cascade laser sensors; the infrared light sensors are 0.1m above the ground and arranged on both sides and bottom of the GIS pipeline to form A 3×7 sensor array; the quantum cascade laser sensor is 0.3m above the ground, arranged on both sides of the GIS pipeline, and the distance between the laser transmitter and the laser receiver of each quantum cascade laser sensor is 20m.

The data transmission subsystem supports wired and wireless dual transmission modes, and supports 5G transmission mode. The 5G transmission mode is used as the normal mode, and the wired transmission mode is used as the emergency backup transmission mode.

As shown in Figure 3, the intelligent analysis unit analyzes the SF ₆ concentration data collected by the GIS indoor SF ₆ gas monitoring subsystem in real time; when a quantum cascade laser sensor detects that the SF ₆ concentration exceeds the first 1-5 minutes of detection 200% of the average value is determined to be a large amount of SF ₆ gas leakage, otherwise it is determined that no large amount of SF ₆ gas leakage has occurred;

The system management platform controls the mobile SF ₆ automatic recovery system based on GIS equipment fault leakage source location to work in different modes according to the SF ₆ leak determination result, (1) it is determined that no large amount of SF ₆ gas leakage has occurred, and SF ₆ trace leakage detection is started Positioning mode and GIS room operating state analysis mode, and then intelligently adjust the arrangement of the gas collection ports according to the location of trace SF ₆ leakage sources or the prediction results of leakage sources; (2) It is determined that a large amount of SF ₆ leakage occurs, and the rapid leakage source positioning mode is activated immediately, And start the SF ₆ purification and recovery device 30s after the intelligent analysis unit completes the location of the leakage source or determines that the leakage occurs;

The SF ₆ trace leakage detection mode regularly uses the sampling interval of 24h, and the sample interval is the SF ₆ concentration data of the past 2 months to analyze whether there is a trace leakage of SF ₆ , and if there is a trace leakage, the SF ₆ trace leakage source location function is activated; The GIS room operation status analysis mode regularly uses historical data to perform big data analysis, identifies abnormal system operation status, and predicts the location of possible leakage sources; the leakage source rapid location mode uses SF ₆ with a sampling interval of 1s and a sample interval of 30s. Concentration data for quick location.

The method for implementing the leak source location by the intelligent analysis unit is as follows:

(1) read each detection point SF ₆ concentration historical data y _i (t) from the storage unit, i is the detection point number, and t is the detection time;

(2) Set the sampling period dt, calculate K _i (t),

where y _i (t) is the SF ₆ concentration at time t at monitoring point i, and dt is the sampling period;

(3) Perform exponential fitting on K(t), that is, solve the optimization problem:

是2范数；P是浓度特征量；Among them, t=0, dt, 2dt...T; T is the length of the analysis interval;

is the 2-norm; P is the concentration characteristic quantity;

(4) Use the comprehensive analysis of the P value of each monitoring point to determine the location of a single-point leak source or the range of a multi-point leak source.

As shown in FIG. 4 , the movable air collecting port is connected with the fixed SF ₆ purification and recovery device through a flexible pipe; the air collecting port is fixed with the motion mechanism; the horizontal movement range of the motion mechanism is 10m (two-way each 5m), the vertical movement distance is 2m; the motion control unit receives the control information transmitted by the intelligent management platform via the data transmission subsystem, and controls the motion of the motion mechanism to drive the movement of the air collecting port;

The arrangement of the movable air collecting port is as follows:

(1) Each of the 4 corners of the GIS room is provided with a movable gas collection port;

(2) In the GIS room, a movable gas collection port is set at an interval of 20m on each side of the longitudinal direction of the GIS pipeline.

Claims (8)

1. Mobile SF based on GIS equipment fault leakage source positioning₆Automatic recovery system, its characterized in that: including GIS indoor SF₆Gas monitoring subsystem, data transmission subsystem, intelligent management platform and mobile SF₆A recovery subsystem;

GIS indoor SF₆The gas monitoring subsystem comprises an infrared light sensor and a quantum cascade laser sensor; the infrared light sensor and the quantum cascade laser sensor are used for collecting SF of each part in the GIS room in real time₆The gas concentration and the measurement information are transmitted to the intelligent management platform through the data transmission subsystem;

the data transmission subsystem is used for realizing the GIS indoor SF₆Gas monitoring subsystem, portable SF₆The information communication between the recovery subsystem and the intelligent management platform comprises a data transmission controller and an input/output interface; the data transmission controller is responsible for distributing and managing the transmission direction and mode of data, and the transmission mode of the data is a wired mode or a wireless mode; the input/output interface is compatible with a wired transmission mode and a wireless transmission mode;

the intelligent management platform comprises a storage unit, an intelligent analysis unit and a system management platform; the storage unit is used for storing SF acquired by the infrared light sensor and the quantum cascade laser sensor₆Concentration of gasHistorical data; the intelligent analysis unit is used for processing and analyzing SF₆Gas concentration data; the system management platform controls all parts of the recovery system to work coordinately according to the analysis result of the intelligent analysis unit;

the mobile SF₆Recovery subsystem for implementing leaked SF₆Including fixed SF₆The device comprises a purification and recovery device, a movable air collecting port, a motion mechanism and a motion control unit; the purification and recovery device is used for realizing leakage SF₆Purification, recovery and temporary storage of; the movable gas collection port, the movement mechanism and the movement control unit are used for improving the leakage SF₆The recycling speed and flexibility are improved, and the recycling effect is enhanced.

2. The mobile SF6 automatic recovery system based on GIS equipment fault leakage source location of claim 1, wherein said SF6 gas monitoring subsystem within a GIS room comprises 21 infrared light sensors and 4 quantum cascade laser sensors; the height of the infrared light sensor from the ground is 0.1m, and the infrared light sensor is arranged on two sides and the bottom of a GIS pipeline to form a 3 multiplied by 7 sensor array; the height of the quantum cascade laser sensors from the ground is 0.3m, the quantum cascade laser sensors are arranged on two sides of a GIS pipeline, and the interval between a laser transmitter and a laser receiver of each quantum cascade laser sensor is 20 m.

3. The GIS equipment fault leakage source location based mobile SF6 automatic recovery system of claim 1, wherein said data transmission subsystem supports dual wired and wireless transmission modes and supports 5G transmission mode, with 5G transmission mode being normal mode and wired transmission mode being emergency standby transmission mode.

4. The GIS equipment fault leakage source positioning-based mobile SF6 automatic recovery system of claim 1, wherein said intelligent analysis unit analyzes said GIS indoor SF in real time₆SF collected by gas monitoring subsystem₆Concentration data; when a quantum cascade laser sensor detects SF₆The concentration exceeds the first 1-5The occurrence of SF is judged as 200% of the average value of the minute detection₆If the gas leaks in a large amount, otherwise, it is judged that no SF occurs₆The gas leaks out in large quantities.

5. The mobile SF6 automatic recovery system based on GIS equipment fault leakage source location of claim 1, wherein said system management platform is according to SF₆Leakage judgment result control GIS equipment fault leakage source positioning-based mobile SF₆The automatic recovery system operates in different modes when it is determined that no SF occurs₆When a large amount of gas leaks, SF is started₆A trace leakage detection positioning mode and a GIS room running state analysis mode, and then according to trace SF₆The leakage source positioning or leakage source prediction result intelligently adjusts the gas collecting port arrangement mode; when it is judged that SF occurs₆When a large amount of leakage occurs, the leakage source rapid positioning mode is started immediately, and SF is started 30s after the intelligent analysis unit finishes the positioning of the leakage source or judges the leakage occurs₆A purification and recovery device.

6. The mobile SF6 automatic recovery system based on GIS equipment fault leakage source location of claim 5, wherein said SF₆The trace leakage detection mode regularly utilizes SF with a sampling interval of 24h and a sample interval of nearly 2 months₆Concentration data analysis for the presence of SF₆Micro leakage, if any, starting SF₆A trace leakage source positioning function; the GIS room running state analysis mode periodically utilizes historical data to analyze big data, identifies abnormal running states of the system and predicts the positions of possible leakage sources; the leakage source rapid positioning mode utilizes SF with a sampling interval of 1s and a sample interval of 30s₆And (5) quickly positioning concentration data.

7. The mobile SF6 automatic recovery system of claim 5 or 6 based on GIS equipment fault leakage source location, wherein said mobile gas collection port is connected to said fixed SF by flexible piping₆The purification and recovery device is connected; the air collecting port is fixed with the moving mechanism; what is needed isThe horizontal moving range of the motion mechanism is 10m (5 m in each direction), and the vertical moving distance is 2 m; the motion control unit receives control information transmitted by the intelligent management platform through the data transmission system, controls the motion mechanism to act and drives the air collecting port to move.

8. The mobile SF6 automatic recovery system based on GIS equipment fault leakage source location of claim 7, wherein said movable collection port is arranged as follows:

(1) a movable air collecting port is arranged at each of 4 corners of the GIS room;

(2) the GIS room is provided with a movable air collecting port at intervals of 20m along each side of the longitudinal direction of the GIS pipeline.

Images