CN218411475U - A test system for temperature characteristics of gas-insulated combined electrical appliances - Google Patents

Abstract

A temperature characteristic test system for a gas insulated switchgear belongs to the field of test detection. Arranging a current source, wherein the output end of the current source is correspondingly connected with a conductor in the GIS shell; a lead cover is arranged on the shell; arranging a contact temperature measuring element on the surface of the conductor; arranging a temperature indicator outside the GIS shell; a measuring lead of the contact temperature measuring element penetrates out of the GIS shell through a lead cover and is correspondingly connected with the input end of a temperature indicator arranged outside the shell; a non-contact temperature measuring device is arranged outside the shell; the non-contact temperature measuring device is arranged at a position corresponding to the position of the contact temperature measuring element. The current source is adopted to provide large current for the conductor in the GIS, the temperature of the surface of the conductor inside the GIS is directly obtained through the thermocouple, the temperature of the conductor is displayed in real time through the temperature indicator, and the distribution difference between the conductor inside the GIS and the external temperature can be really obtained.

Description

A test system for temperature characteristics of gas-insulated combined electrical appliances

technical field

The utility model belongs to the field of test and detection of electric equipment, in particular to a temperature characteristic test system for gas-insulated combined electric appliances.

Background technique

During the operation of gas insulated SWITCHGEAR (GAS insulated SWITCHGEAR, referred to as GIS in the industry), the temperature will rise due to the high current flowing inside and heat generation.

It is a common method to measure GIS temperature externally by infrared imaging. However, due to the difference between the shell temperature and the internal conductor temperature, it is necessary to study the characteristic difference between the internal conductor temperature and the shell temperature.

At present, to solve this problem, the method of simulation calculation is mostly used to obtain the distribution characteristics of the temperature of the internal conductor and the temperature of the shell through finite element calculation. However, the actual situation cannot be fully considered during the simulation calculation process, and the conclusion of the simulation often deviates. The reliability of the data The accuracy and simulation accuracy need to be improved.

How to measure the distribution difference between the internal conductor and external temperature of GIS more realistically and provide a test system that can truly reflect the temperature difference between the internal conductor and external GIS is a practical technical problem to be solved urgently in the actual test work.

Utility model content

The technical problem to be solved by the utility model is to provide a temperature characteristic test system of a gas-insulated combined electric appliance. It belongs to the system that uses the test method to study the temperature characteristics of GIS. It can realize the test measurement of the temperature distribution difference between the inner conductor and the outside of the GIS, and provides a test system for the study of the temperature difference between the inner conductor and the outside of the GIS.

The technical scheme of the utility model is: to provide a temperature characteristic test system of a gas-insulated combined electrical appliance, which includes a conductor located in the GIS shell, and the conductor is fixed in the GIS shell through an insulator, and the characteristics are:

Set up a current source, the output terminal of the current source is correspondingly connected with the conductor in the GIS shell;

Set a lead cover on the GIS housing;

Setting a contact temperature measuring element on the surface of the conductor located in the GIS;

On the outside of the GIS shell, set a temperature indicator;

The measurement leads of the contact temperature measuring element go out of the GIS shell through the lead cover, and are correspondingly connected with the input end of the temperature indicator arranged outside the GIS shell;

On the outside of the GIS enclosure, a non-contact temperature measurement device is provided;

The installation position of the non-contact temperature measurement device corresponds to the installation position of the contact temperature measurement element.

Specifically, the conductor is a copper row.

Specifically, the insulator is a pot insulator.

Further, the contact temperature measuring element is a thermocouple.

Specifically, the non-contact temperature measuring device is an infrared imager.

Further, the GIS shell where the current source and the conductor are located are both grounded, and a current loop is formed through the ground.

Alternatively, both the current source and the conductor are grounded to form a current loop through the ground.

Specifically, in the direction of the length axis of the conductor, the installation position of the non-contact temperature measurement device corresponds to the installation position of the contact temperature measurement element.

Or, in the direction of the length axis of the conductor, the projection value of the installation position of the contact temperature measuring element and the installation position of the non-contact temperature measurement device in the axis direction of the conductor is a fixed distance value.

Further, the contact temperature measuring element is pasted on the surface of the conductor.

Compared with the prior art, the utility model has the advantages of:

1. The current source is used to provide a large current for the conductor in the GIS, and the temperature distribution difference between the internal conductor and the external temperature of the GIS is recorded through actual measurement, so that the distribution difference between the internal conductor and the external temperature of the GIS can be truly obtained;

2. The entire technical solution only needs the current source as the energy supply device, directly obtains the temperature of the conductor surface inside the GIS through the thermocouple, and displays the conductor temperature in real time through the temperature indicator, and the measurement results are visually displayed and can be observed in real time;

3. Obtain the temperature of the GIS shell through the infrared imager. By comparing the temperature value obtained by the thermocouple with the temperature value obtained by the infrared imager, it is convenient and intuitive to study the temperature of the internal conductor after it is transmitted to the shell. The change rule is simple and easy to implement, the implementation cost is low, and the data measured and compared are intuitive and reliable.

Description of drawings

Fig. 1 is a schematic diagram of connection of system components of the present invention.

In the figure, 1 is a current source, 2 is a conductor, 3 is a pot insulator, 4 is a GIS shell, 5 is a thermocouple, 6 is a lead cover, 7 is a temperature indicator, and 8 is an infrared imager.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

In Fig. 1, a kind of temperature characteristic test system of gas insulated combined electric appliance provided by the utility model, this test system is made up of current source 1, conductor 2, basin type insulator 3, GIS shell 4, thermocouple 5, lead wire cover 6, temperature indicator device 7 and infrared imager 8.

As shown in Figure 1, the conductor 2 in the GIS is fixed in the GIS shell 4 through the pot insulator 3, a lead cover 6 is set on the GIS shell, and a thermocouple 5 is set on the surface of the conductor in the GIS. The even measurement leads pass through the GIS shell 4 through the lead wire cover, and are correspondingly connected with the input end of the temperature indicator 7 arranged outside the GIS shell, and the actual measured temperature value of the conductor is displayed outside the GIS shell 4 in real time.

An infrared imager is set outside the GIS shell to measure the temperature of the GIS shell.

The output end of the current source is connected to the conductor of the GIS (actually the copper bar terminal serving as the main wiring of the transmission line, a total of three phases, the experiment can test the copper bar terminal of each phase separately),

In this technical solution, the current source 1 is used to provide a large current for the conductor 2 in the GIS, and the GIS where the current source and the conductor are located are both grounded to form a current loop through the earth.

The thermocouple 5 attached to the surface of the conductor inside the GIS is used to measure the surface temperature of the conductor, and the measuring lead is connected to the temperature indicator 7 through the lead cover 6 to display the conductor temperature in real time.

Externally, an infrared imager is used to measure the temperature of the GIS shell. By comparing the temperature value obtained by the thermocouple with the temperature value obtained by the infrared imager, the change law of the shell temperature after the internal conductor temperature is transmitted to the shell is studied.

As shown in Figure 1, the setting position of the infrared imager corresponds to the setting position of the thermocouple; or, in the axial direction of the conductor, the setting position of the thermocouple corresponds to the setting of the infrared imager in the axial direction of the conductor The position projection value is a fixed spacing value to truly obtain the distribution difference between the internal conductor and the external temperature of the GIS.

In the test, the applied current value can be adjusted and changed to study the change law of the conductor temperature in the GIS and the temperature of the GIS shell under the action of different currents.

In this technical solution, the current source is used to provide a large current for the conductor in the GIS, the temperature of the internal conductor surface of the GIS is directly obtained through the thermocouple, and the real-time display of the conductor temperature is carried out through the temperature indicator, which can truly obtain the internal conductor and external temperature of the GIS The difference in distribution; the temperature of the GIS shell is obtained by the infrared imager, and by comparing the temperature value obtained by the thermocouple with the temperature value obtained by the infrared imager, it is convenient and intuitive to study the temperature of the internal conductor after it is transferred to the shell. The change rule of the temperature is simple and easy to implement, the implementation cost is low, the measured data is intuitive, and the reliability is high.

The utility model can be widely used in the field of temperature characteristic test of gas-insulated combined electrical appliances.

Claims (10)

1. A gas-insulated combined electrical appliance temperature characteristic test system, comprising a conductor positioned in the GIS casing, the conductor is fixed in the GIS casing through an insulator, and is characterized in that: Set up a current source, the output terminal of the current source is correspondingly connected with the conductor in the GIS shell; Set a lead cover on the GIS housing; Setting a contact temperature measuring element on the surface of the conductor located in the GIS; On the outside of the GIS shell, set a temperature indicator; The measurement leads of the contact temperature measuring element go out of the GIS shell through the lead cover, and are correspondingly connected with the input end of the temperature indicator arranged outside the GIS shell; On the outside of the GIS enclosure, a non-contact temperature measurement device is provided; The installation position of the non-contact temperature measurement device corresponds to the installation position of the contact temperature measurement element. 2. The temperature characteristic test system of gas-insulated combined electrical appliances according to claim 1, wherein said conductors are copper bars. 3. The temperature characteristic test system of gas-insulated combined electrical appliances according to claim 1, wherein said insulators are basin-type insulators. 4. The temperature characteristic test system of gas-insulated combined electrical appliances according to claim 1, characterized in that said contact temperature measuring element is a thermocouple. 5. The temperature characteristic test system of gas-insulated combined electrical appliances according to claim 1, characterized in that said non-contact temperature measuring device is an infrared imager. 6. The temperature characteristic test system of gas-insulated combined electrical appliances according to claim 1, characterized in that the GIS shell where the current source and the conductor are located are both grounded, and a current loop is formed through the earth. 7. The temperature characteristic test system of gas-insulated combined electrical appliances according to claim 1, wherein the current source and the conductor are both grounded, and a current loop is formed through the ground. 8. The temperature characteristic test system of gas-insulated combined electrical appliances according to claim 1, characterized in that in the direction of the length axis of the conductor, the installation position of the non-contact temperature measuring device is the same as that of the contact temperature measuring element. corresponding to the setting position. 9. The temperature characteristic test system of gas-insulated combined electrical appliances according to claim 1, characterized in that in the direction of the length axis of the conductor, the installation position of the contact temperature measuring element is in the same position as the non-contact temperature measuring device The projection value of the set position in the axis direction of the conductor is a fixed spacing value. 10. The temperature characteristic test system of gas-insulated combined electrical appliances according to claim 1, characterized in that said contact temperature measuring element is pasted on the surface of the conductor.

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