CN204241462U - A kind of for SF in GIS 6the calibration system of gas micro water content detector - Google Patents

Abstract

The utility model provides a calibration system for SF ₆ gas micro-water content detector in GIS, including branch one and branch two respectively connected to the special gas chamber for SF ₆ gas micro-water detection, and SF ₆ in branch one One end of the special gas chamber for gas micro-water detection is connected to the calibration module, and the other end is connected to the gas supply port; the two ends of the special gas chamber for SF ₆ gas micro-water detection in branch 2 are respectively connected to the gas micro-water content adjustment module and the pressure control module. Form a loop. Compared with the prior art, the calibration system provided by the utility model for the _SF6 gas micro-water content detector in the GIS has a high calibration accuracy rate, which ensures the accuracy of the detected _SF6 gas micro-water detector, thereby The electrical insulation performance of the SF ₆ electrical equipment detected and repaired by the micro-water detector is good, and the operation efficiency and safety of the entire GIS are ensured.

Description

A Calibration System for SF6 Gas Moisture Content Detector in GIS

technical field

The utility model relates to the field of electrical engineering, in particular to a calibration system for a SF ₆ gas micro-water content detector in a GIS.

Background technique

With the rapid development of the economy, the capacity of the power system has expanded rapidly, and the use of SF ₆ electrical equipment in GIS has become more and more extensive. Among them, the moisture measurement in SF ₆ gas has become a crucial part in the maintenance of SF ₆ electrical equipment. For GIS, the increase of moisture content in SF ₆ gas will significantly reduce its electrical insulation performance, affecting the safe operation of power equipment, and the accuracy of the detection equipment used to detect the moisture content in SF ₆ gas determines the SF ₆ The accuracy of the moisture content in the gas will affect the operation efficiency and safety of the entire GIS.

One of the core problems of the existing measuring instruments for measuring the micro-water content of _SF6 in GIS is that there are many brands of instruments used for measurement, different principles, and uneven performance. As a user unit, it is difficult to grasp these instruments Accuracy of test results.

In order to solve the above problems, the manual estimation method is often used to calibrate the measuring instrument, but this calibration method has low accuracy and takes a long time, and cannot meet the accuracy requirements of the SF ₆ gas micro-water content measuring instrument in GIS.

For GIS, which will have a greater demand for the use of SF ₆ electrical equipment in the future, the above problems will become more prominent. In addition, with the continuous development of the power grid, the demand for GIS engineering construction is also increasing. Therefore, how to design a calibration system that can be used for SF ₆ gas micro-water content detectors in GIS to calibrate the micro-water content of SF ₆ gas in GIS The accuracy of the measuring instrument of water content is a technical problem to be solved urgently in this field.

Utility model content

In view of this, the utility model provides a kind of calibration system for SF ₆ gas micro-water content detector in GIS, the calibration system can adjust the moisture in its own gas storage tank, obtain standard micro-water content data, and pass Comparing the standard micro-water content measuring instrument with the micro-water detector to be calibrated, the accuracy of the micro-water detector to be calibrated for detecting the micro-water content of SF ₆ gas is obtained; the calibration accuracy of this calibration system is high, It ensures the accuracy of the micro-water detector of the detected SF ₆ gas, so that the electrical insulation performance of the SF ₆ electrical equipment detected and repaired by the micro-water detector is good, and the operation efficiency and safety of the entire GIS are ensured.

A calibration system for SF6 gas micro-water content detector in GIS, the calibration system is used to calibrate the micro-water content measuring instrument to be tested, and the system includes a branch circuit respectively connected to a special gas chamber for SF6 gas micro-water detection and branch two,

One end of the SF6 gas micro-water detection dedicated gas chamber in the branch one is connected to the calibration module, and the other end is connected to the gas supply port;

The two ends of the SF6 gas micro-water detection special gas chamber in the branch two are respectively connected with the gas micro-water content adjustment module and the pressure control module to form a loop;

The calibration module includes the micro-water content measuring instrument to be tested and the standard micro-moisture content measuring instrument connected in parallel, the connecting end of the micro-water content measuring instrument to be tested and the connecting end of the standard micro-water content measuring instrument are all set There are manual valves.

Preferably, the gas micro-water content adjustment module includes a parallel water inlet and a filter system, both ends of the water inlet are provided with manual valves, and both ends of the filter system are provided with electromagnetic valves.

Preferably, the filter system includes a dry filter and a dust filter connected in series.

Preferably, the pressure control module includes a pressure reducing valve, a dust filter, a first pressure controller, a compressor and a second pressure controller connected in sequence.

Preferably, an air pressure gauge is provided between the dust filter and the compressor, and a safety valve is provided between the second pressure controller and the compressor.

Preferably, a manual valve is provided between the calibration module in the branch one and the special gas chamber for SF6 gas micro-water detection, the special gas chamber for SF6 gas micro-water detection and the gas supply port.

Preferably, the gas micro-water content adjustment module in the branch two and the special gas chamber for SF6 gas micro-water detection, and the special gas chamber for SF6 gas micro-water detection and the pressure control module are all provided. There is a solenoid valve.

As can be seen from the above-mentioned technical scheme, the utility model provides a kind of calibration system that is used for the _SF6 gas micro-water content detector in the GIS, and the calibration system includes a branch circuit respectively connected to the _SF6 gas micro-water detection special-purpose gas chamber With branch road two, by one end of the _SF6 gas micro-water detection special-purpose gas chamber in the branch road one, connect the calibration module, the other end connects the air supply port; and the _SF6 gas micro-water detection special gas The two ends of the chamber are respectively connected with the gas micro-water content adjustment module and the pressure control module to form a loop. This enables the calibration system to adjust the moisture in its own gas storage tank, obtain standard micro-water content data, and compare the standard micro-water content measuring instrument with the _micro- water detector to be calibrated. Whether the accuracy of the micro-water detector to be calibrated for water content is accurate or not; the calibration accuracy of this calibration system is high, which ensures the accuracy of the micro-water detector of the detected SF ₆ gas, so that it can be detected by the micro-water detector and The refurbished SF ₆ electrical equipment has good electrical insulation performance and ensures the operating efficiency and safety of the entire GIS.

Compared with the closest prior art, the technical solution provided by the utility model has the following excellent effects:

1. In the technical solution provided by the utility model, one end of the special gas chamber for micro-water detection of SF6 gas is connected to the calibration module, and the other end is connected to the gas supply port, and the two ends of the special gas chamber for micro-water detection of SF6 gas are respectively compared with the micro-water content of the gas. The adjustment module and the pressure control module are connected to form a loop, so that the calibration system can adjust the moisture in its own gas storage tank, so that standard data can be obtained, and by comparing the standard micro-water content measuring instrument with the micro-water detector to be calibrated, Obtain whether the accuracy of the micro-water detector to be calibrated for detecting the micro-water content of _SF6 gas is accurate or not; the calibration accuracy rate of this calibration system is high, ensuring the accuracy of the micro-water detector of the detected _SF6 gas, Therefore, the electrical insulation performance of the SF ₆ electrical equipment detected and repaired by the micro-water detector is good, and the operation efficiency and safety of the entire GIS are ensured.

2. The technical solution provided by the utility model is a calibration system composed of a calibration module, an air supply port, a gas micro-water content adjustment module and a pressure control module. There is no oil involved in the whole calibration process, so the problem of secondary pollution is avoided .

3. The technical solution provided by the utility model is a calibration system composed of a calibration module, an air supply port, a gas micro-water content adjustment module and a pressure control module without the participation of large devices. It has a simple structure, low power consumption and low noise.

4. The technical solution provided by the utility model and the design of the manual valve and solenoid valve in the calibration system make the operation of the calibration system simple and save the time and cost of operation.

5. The technical solution provided by the utility model is widely used and has remarkable social and economic benefits.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings that need to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural representation of the calibration system for _SF6 gas micro-water content detector in GIS of the present utility model.

Among them, 1—SF ₆ gas micro-water detection special gas chamber, 101-branch one, 102-branch two, 103-calibration module, 104-pressure control module, 105-gas micro-water content adjustment module, 2-barometer , 3—Safety valve, 4—Manual valve, 5—Fill port, 6—Solenoid valve, 7—Solenoid valve, 8—Dust filter, 9—Dry filter, 10—Solenoid valve, 11—Manual valve, 12 —manual valve, 13—water inlet, 14—manual valve, 15—compressor, 16—safety valve, 17—dust filter, 18—barometer, 19—second pressure controller, 20—first pressure controller , 21—pressure reducing valve, 22—electromagnetic valve, 23—manual valve, 24—manual valve, 25—manual valve, 26—micro water measuring instrument to be detected, 27—standard micro water measuring instrument.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model.

As shown in Figure 1, in the utility model, be used in the calibration system of _SF6 gas micro-water content detector in GIS comprise respectively connect branch one 101 and branch two 102 of _SF6 gas micro-water detection special gas chamber 1, in An air pressure gauge 2 and a safety valve 3 are connected to the special air chamber 1 for SF ₆ gas micro-water detection; one end of the special gas chamber 1 for SF ₆ gas micro-water detection in the branch 101 is connected to a calibration module 103, and the other end is connected to a supplementary valve. Gas port 5; the two ends of the SF ₆ gas micro-water detection dedicated gas chamber 1 in branch 2 102 are respectively connected with the gas micro-water content adjustment module 105 and the pressure control module 104 to form a circuit.

Wherein, the calibration module 103 includes a micro-water content measuring instrument 26 to be tested and a standard micro-water content measuring instrument 27 connected in parallel, and the connecting ends of the micro-water content measuring instrument 26 to be tested and the standard micro-water content measuring instrument 27 are all provided with a manual valves 24, 25;

The gas micro-water content regulating module 105 comprises a water inlet 13 with manual valves 14, 11 at both ends and a filter system with solenoid valves 10, 7 at both ends. The water inlet 13 is connected in parallel with the filter system, and the water inlet itself is also connected in parallel. For the manual valve 12, the filter system includes a dry filter 9 and a dust filter 8 connected in series.

The pressure control module 104 comprises a decompression valve 21, a dust filter 17, a first pressure controller 20, a compressor 15 and a second pressure controller 19 connected in sequence; an air pressure gauge is arranged between the dust filter 17 and the compressor 15 18. A safety valve 16 is provided between the second pressure controller 19 and the compressor 15.

Wherein, a manual valve 23 is provided between the special gas chamber 1 and the calibration module 103 for SF ₆ gas micro-water detection in branch one 101, and a manual valve 4 is provided between the gas supply port 5; the SF gas in branch two 102 ₆ A solenoid valve 6 is provided between the special gas chamber 1 for gas micro-water detection and the gas micro-water content adjustment module 105, and a solenoid valve 22 is provided between the pressure control module 104.

When using the calibration system of the present utility model, because the system is filled with high-purity nitrogen to a slight positive pressure when the equipment leaves the factory, when it is in normal use, the device itself must first be vacuumed, that is, first open the manual valve 4 to turn the system The high-purity nitrogen in it is discharged into the atmosphere. Then connect the external vacuum pump to the gas supply port 5, open the manual valves 11, 14 and press the solenoid valves 6, 7 and 10, 22 buttons to start the vacuum pump to extract the gas in the system. After observing that the vacuum degree reaches the requirement, close the vacuum pump and all valves, and proceed to the next stage of gas supply.

In the gas supply stage, the SF ₆ cylinder is connected to the gas supply port 5 through the pressure reducing valve 21 and the connecting pipe. Open the manual valve 4, slowly open the cylinder valve, adjust the pressure reducing valve 21, then slowly fill SF ₆ into the special air chamber 1 for SF ₆ gas micro-water detection, observe the pressure of the pressure gauge 2, when it reaches the requirement (0.4MPa～0.5 MPa), close the manual valve 4 and the steel cylinder valve, and proceed to the next step to adjust the gas moisture content.

When adjusting the moisture content of the gas, if the moisture content is increased, the manual valve 12 is opened, an appropriate amount of water is dripped from the water inlet 13, and the manual valve 12 is closed. Open manual valve 11,14, press solenoid valve 6,22 and compressor 15 buttons, make gas circulation flow through dust filter 17 after a certain hour, close manual valve 11,14, solenoid valve 6,22 and compressor 15.

If reduce moisture content, press electromagnetic valve 7,10 and 6,22, compressor 15 buttons, make gas circulate through drier filter 9 and dust filter 8,17 After a certain period of time, close electromagnetic valve 11,14,6, 22 and compressor 15.

After adjusting the moisture content of the gas, check the accuracy of the SF ₆ online detection instrument, that is, after confirming that the micro-water measuring instrument 26 to be tested is connected to the standard micro-water measuring instrument 27, open the manual valves 23, 24, and 25, and observe the reading of the standard measuring instrument 27 , to judge whether the reading of micro-water measuring instrument 26 to be tested is accurate.

During the use of the calibration system, attention should be paid to the repair and maintenance of the device: (1) The device and the environment should be kept clean; (2) The desiccant has a certain water adsorption capacity, and should be replaced in time when it reaches or is close to saturation, so as not to affect the drying effect (3) Check the opening flexibility of the safety valve regularly according to regulations; (4) Regularly check the pressure gauge according to regulations; (5) This device has been tested for air tightness before leaving the factory, but due to various reasons, After using it for a period of time, it is necessary to do a regular seal check.

The above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit it. Although the utility model has been described in detail with reference to the above examples, those of ordinary skill in the art can still modify the specific implementation of the present utility model Or equivalent replacements, and any modification or equivalent replacements that do not depart from the spirit and scope of the present invention are all within the protection scope of the claims of the pending application of the present invention.

Claims (7)

1. one kind for SF in GIS ₆the calibration system of gas micro water content detector, described calibration system, for demarcating micro-water content measuring instrument to be measured, is characterized in that, described system comprises and connects SF respectively ₆the micro-water of gas detects branch road one and the branch road two of special air chamber,

Described SF in described branch road one ₆one end that the micro-water of gas detects special air chamber connects demarcating module, other end connection gas supplementing opening;

Described SF in described branch road two ₆the two ends that the micro-water of gas detects special air chamber are connected with gas micro water content adjustment module and pressure control module respectively and form loop;

Described demarcating module comprises micro-water content measuring instrument described to be measured in parallel and standard micro-water content measuring instrument, and the link of described micro-water content measuring instrument to be measured and the link of described standard micro-water content measuring instrument are equipped with hand valve.

2. calibration system as claimed in claim 1, is characterized in that, described gas micro water content adjustment module comprises water inlet in parallel and filtering system, and the two ends of described water inlet are equipped with hand valve, and the two ends of described filtering system are equipped with solenoid valve.

3. calibration system as claimed in claim 2, it is characterized in that, described filtering system comprises device for drying and filtering and the dirt filtrator of series connection.

4. calibration system as claimed in claim 1, it is characterized in that, described pressure control module comprises the reduction valve, dirt filtrator, the first pressure controller, compressor and the second pressure controller that connect successively.

5. calibration system as claimed in claim 4, is characterized in that, be provided with rain glass between described dirt filtrator and described compressor, be provided with safety valve between described second pressure controller and described compressor.

6. calibration system as claimed in claim 1, is characterized in that, the described demarcating module in described branch road one and described SF ₆the micro-water of gas detects special air chamber, described SF ₆the micro-water of gas detects between special air chamber and described gas supplementing opening and is equipped with hand valve.

7. calibration system as claimed in claim 1, is characterized in that, the described gas micro water content adjustment module in described branch road two and described SF ₆the micro-water of gas detects special air chamber, described SF ₆the micro-water of gas detects between special air chamber and described pressure control module and is equipped with solenoid valve.