CN217954569U

CN217954569U - Transformer substation grounding impedance test system with temperature and humidity test function

Info

Publication number: CN217954569U
Application number: CN202220813290.1U
Authority: CN
Inventors: 石峥; 吴寿山; 张弘; 孙昭昌; 雷敏; 张珂; 陈伟坤; 白志轩; 张若愚; 葛惠阳; 李宗�
Original assignee: QINGDAO POWER SUPPLY Co OF STATE GRID SHANDONG ELECTRIC POWER Co; State Grid Corp of China SGCC
Current assignee: QINGDAO POWER SUPPLY Co OF STATE GRID SHANDONG ELECTRIC POWER Co; State Grid Corp of China SGCC
Priority date: 2022-04-08
Filing date: 2022-04-08
Publication date: 2022-12-02
Anticipated expiration: 2032-04-08

Abstract

The utility model provides a transformer substation grounding impedance test system with temperature and humidity test function, which comprises a voltage electrode and a current electrode which are respectively connected with a host; a temperature sensor for testing the ambient temperature and a humidity sensor for testing soil are fixed on the voltage pole; a temperature sensor for testing the ambient temperature and a humidity sensor for testing soil are fixed on the current electrode; the utility model discloses all set up temperature sensor and humidity transducer on voltage test equipment and current test equipment, realized when the ground connection impedance test of transformer substation, carry out the measurement of test point department humiture, richened the test content, provide the foundation for all-round understanding test point and test content.

Description

Transformer substation grounding impedance test system with temperature and humidity test function

Technical Field

The utility model belongs to the technical field of the transformer substation ground connection test is relevant, concretely relates to transformer substation ground connection impedance test system with temperature and humidity test function.

Background

The grounding of the power equipment is an important part for ensuring personal safety and normal operation of the power equipment, and the grounding impedance refers to the blocking effect of current flowing to the ground through a grounding device, namely the ratio of voltage to grounding current of a grounding body of the power equipment to the grounding body at infinite distance; the transformer substation generally adopts a current-voltmeter tripolar method for measuring the grounding impedance, and is divided into linear arrangement and triangular arrangement according to the arrangement mode of the electrodes.

The inventor finds that when the transformer substation grounding impedance test is carried out, only the measurement of information such as current, voltage and position is carried out, and the measurement of environmental information such as temperature and humidity at the measuring point is not carried out; this prevents full knowledge of the measurement points and the measurement content.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve above-mentioned problem, provided a transformer substation's ground connection impedance test system with humiture test function, the utility model discloses all set up temperature sensor and humidity transducer on voltage test equipment and current test equipment, realized when transformer substation's ground connection impedance test, carry out the measurement of test point department humiture, richened the test content, provide the foundation for all-round understanding test point and test content.

According to some embodiments, the utility model provides a transformer substation's ground connection impedance test system with temperature and humidity test function adopts following technical scheme:

a transformer substation grounding impedance test system with temperature and humidity test function comprises a voltage electrode and a current electrode which are respectively connected with a host;

a temperature sensor for testing the ambient temperature and a humidity sensor for testing soil are fixed on the voltage pole;

and a temperature sensor for testing the ambient temperature and a humidity sensor for testing soil are fixed on the current pole.

Further, the voltage electrode is a voltage grounding probe; the current electrode is a current grounding probe.

Further, the temperature sensor is fixed at one end of the voltage grounding probe, which does not enter the soil.

Further, the humidity sensor is fixed at one end of the voltage grounding probe, which enters the soil.

Further, the temperature sensor is fixed at one end of the current grounding probe, which does not enter the soil.

Further, the humidity sensor is fixed at one end of the current grounding probe, which enters the soil.

Furthermore, the humidity sensor is a soil humidity sensor, and a probe of the soil humidity sensor is fixed on the same fixing piece with the voltage pole or the current pole.

Further, the voltage pole and the current pole are respectively connected with the host machine in a wired mode.

Further, the host is a grounding impedance tester.

Furthermore, the host is at least provided with a display screen.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses set up temperature sensor and humidity transducer on voltage test equipment and current test equipment, realized when transformer substation's ground impedance tests, carry out the measurement of test point department humiture, richened the test content, provide the basis for all-round understanding test point and test content;

the size of the grounding impedance is greatly related to the resistivity of the soil, the resistivity of the soil is related to the water content of the soil, the season, the temperature and other factors, and generally, the resistivity of the soil is low when the soil is wet; to ensure accurate measurement of the ground impedance, it is necessary to measure the temperature and humidity at the current and voltage poles.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to constitute a limitation on the invention.

Fig. 1 is a schematic view of embodiment 1 of the present invention;

fig. 2 is a schematic diagram of a sensor arrangement according to another embodiment of the present invention;

wherein: 1. the grounding impedance tester comprises a grounding impedance tester 11, a display screen, 2, a first grounding probe, 3, a second grounding probe, 4, a humidity sensor, 5, a temperature sensor, 6 fixing pieces, 7, an insulating piece, 8 and soil.

The specific implementation mode is as follows:

the present invention will be further explained with reference to the accompanying drawings and examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Example 1:

as shown in fig. 1, the embodiment provides a transformer substation grounding impedance testing system with a temperature and humidity testing function, which is characterized by comprising a voltage electrode and a current electrode respectively connected with a host;

Due to the arrangement of the temperature sensor and the humidity sensor, the temperature and humidity test is realized while the grounding impedance test is carried out; the size of the grounding impedance is greatly related to the resistivity of the soil, the resistivity of the soil is related to the water content of the soil, the season, the temperature and other factors, and generally, the resistivity of the soil is low when the soil is wet; to ensure accurate measurement of the ground impedance, it is necessary to measure the temperature and humidity at the current and voltage poles.

In this embodiment, as shown in fig. 1, the host may be configured as a ground impedance tester 1, and the voltage pole and the current pole may be configured as a first ground probe 2 and a second ground probe 3 for inserting into soil;

in this embodiment, the current or voltage electrode, the humidity sensor 4 and the temperature sensor 5 may be fixed in the following manner: the humidity sensor 4 can adopt a soil humidity sensor, and a probe of the soil humidity sensor and the first grounding probe 2 are fixed through the same fixing piece 6; in this way, the purpose that the probe of the soil humidity sensor and the first grounding probe 2 are inserted into the soil at the same time for testing can be achieved, and similarly, the probe of the soil humidity sensor and the second grounding probe 3 are fixed through the same fixing piece 6; the temperature sensor 5 is fixed on the upper end or the side surface of the fixing piece by adopting the existing product.

It should be noted that the fixing member 6 may be configured as a metal housing or a plastic housing according to actual conditions, and the probe of the soil moisture sensor, the first ground probe 2, and the second ground probe 3 may be implemented by a conventional fixing manner, for example, a bolt hole is formed in the fixing member 6, a thread is formed on the probe for screw-thread fitting and fixing, or the probe is directly welded in the hole formed in the fixing member 6; the temperature sensor 5 can be fixed on the fixing part 6 through welding, adhesive bonding or bolt connection and other modes, and the temperature sensor 5 can adopt an SHT21 temperature sensor, a temperature and humidity measuring instrument, an LED digital display thermometer, an intelligent temperature recorder and the like.

The specific structures and functions of the ground impedance tester 1, the first ground probe 2 and the second ground probe 3 and the connection relationship realized in a wired manner can be realized by a conventional technology or the prior art, and are not detailed herein; the soil moisture sensor can be provided with one probe or a plurality of probes, and the soil moisture sensor also comprises a detection circuit and the like, which belong to the conventional or prior art and are not described in detail herein; for example, in one embodiment, a soil moisture sensor structure of CN201885993U may be adopted.

It is understood that the voltage electrode is a voltage ground probe, and the voltage ground probe is a first probe; the current electrode is a current grounding probe, and the current grounding probe is a second probe.

In this embodiment, the host is at least provided with a display screen, and the host is a grounding impedance tester host, and is an existing product, and is responsible for receiving current and voltage data transmitted by a voltage electrode and a current electrode and calculating grounding impedance; in this embodiment, the display of the temperature and humidity can be separately displayed by the display components on the temperature sensor and the humidity sensor; in other embodiments, the host may receive and display the temperature and humidity data of the temperature and humidity sensors at the voltage poles and the current poles simultaneously.

In other embodiments, the temperature sensor 5 is fixed at the end of the voltage ground probe that does not enter the soil; the humidity sensor 4 is fixed at one end of the voltage grounding probe, which enters the soil; at this time, the probe of the humidity sensor 4 and the voltage ground probe may be set to one; or as shown in fig. 1, the voltage ground probe (second probe 2) is fixed at the front end of the probe of the humidity sensor through an insulating member 7, as long as the probe of the humidity sensor and the voltage ground probe can be inserted into the test chamber at the same time. Similarly, the temperature sensor 5 is fixed at one end of the current grounding probe, which does not enter the soil; the humidity sensor 4 is fixed at one end of the current grounding probe, which enters the soil; at this time, the probe of the humidity sensor 4 and the current grounding probe may be provided as one, or the current grounding probe may be fixed to the front end of the probe of the humidity sensor; the temperature sensor 5 is fixed on the side surface of the fixing member 6.

The working principle or process of the embodiment is as follows:

the voltage pole and the current pole with the sensors are fixed (inserted) in soil of a preset test point as required, the temperature sensor is positioned outside the soil and used for testing the temperature of the surrounding environment, and the probe of the humidity sensor is positioned below the soil and used for testing the humidity of the soil.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A transformer substation grounding impedance test system with a temperature and humidity test function is characterized by comprising a voltage electrode and a current electrode which are respectively connected with a host;

a temperature sensor for testing the ambient temperature and a humidity sensor for testing soil are fixed on the current electrode;

the voltage electrode is a voltage grounding probe; the current electrode is a current grounding probe; the temperature sensor is fixed at one end of the voltage grounding probe, which does not enter the soil; the humidity sensor is fixed at one end of the voltage grounding probe, which enters the soil; the temperature sensor is fixed at one end of the current grounding probe, which does not enter the soil; the humidity sensor is fixed at one end of the current grounding probe, which enters the soil.

2. The transformer substation grounding impedance testing system with the temperature and humidity testing function of claim 1, wherein the humidity sensor is a soil humidity sensor, and a probe of the soil humidity sensor is fixed on the same fixing member as the voltage pole or the current pole.

3. The substation grounding impedance testing system with the temperature and humidity testing function of claim 1, wherein the voltage pole and the current pole are respectively connected with the host computer in a wired manner.

4. The substation grounding impedance testing system with the temperature and humidity testing function of claim 1, wherein the host is a grounding impedance tester.

5. The substation grounding impedance testing system with the temperature and humidity testing function of claim 1, wherein at least a display screen is arranged on the host machine.