CN112782615A - Test data processing and analyzing method for electrical integrity of traction substation grounding device - Google Patents
Test data processing and analyzing method for electrical integrity of traction substation grounding device Download PDFInfo
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Abstract
The invention provides a test data processing and analyzing method for the electrical integrity of a traction substation grounding device, which comprises the steps of obtaining a direct current resistance test value between a reference point and a measurement point tested device; determining electrical integrity information according to the direct current resistance test value and the direct current resistance early warning value; the electrical integrity information includes: good connection condition, bad connection condition and no connection. The invention has the beneficial effects that: can regularly carry out the electrical integrity test to earthing device, through measuring point equipment under test's electrical integrity information, can make things convenient for the staff to know the condition of measuring point equipment under test connection state, according to measuring point equipment under test's electrical integrity information, can also carry out the test frequency adjustment to variable measuring point equipment under test, if variable measuring point equipment under test's connection state is bad, can the early warning and increase measuring frequency, strengthened the management to measuring point equipment under test connection state.
Description
Technical Field
The invention relates to the technical field of power electrical equipment, in particular to a test data processing and analyzing method for electrical integrity of a grounding device of a traction substation.
Background
The railway comprehensive grounding system is a grounding system which integrates devices needing grounding, such as a traction power supply backflow system, an electric power supply system, a signal system, a communication and other electronic information system, a building, a ballast bed, a platform, a bridge, a tunnel, a sound barrier and the like along the railway into a whole by penetrating through a grounding wire, and is a net-shaped grounding device with functions of drainage and voltage sharing.
At present, with the high-speed development of electrified railway networks in China, railways become main transportation modes and main freight tools for people to go out, and the safety of the railways is of great importance; higher requirements are also put forward on the safety of power systems such as a railway integrated system grounding system and the like.
The electrical integrity of the grounding device in the traction substation refers to the electrical continuity between various electrical devices to be grounded in the grounding device, between each part of the grounding device and between each device, namely the direct current resistance value, also called electrical conductivity, and the reliable and effective connection between the grounding lead of the power device and the ground grid is the fundamental guarantee for the safe operation of the device. In the long-term operation process of the railway comprehensive grounding system, the ground rod or the ground net can be buried in the ground for a long time and corroded by moisture, so that the grounding resistance is overlarge, and even the grounding function is lost; or because of construction carelessness or other factors, the branch box is not connected with the ground rod or the ground net at all; or the resistance between the ground rod or the ground grid, the equipment grounding and the working point is increased, even is not conducted, so that the requirement of the power regulation can not be met, the normal operation of the equipment is influenced, and even the traction substation is not well grounded to cause harm, and therefore, the electrical integrity test of the grounding device needs to be carried out regularly.
At present, the electrical integrity test of the grounding device needs regular detection by professional personnel, the professional level of the detection personnel directly influences the test result, the measurement result is inaccurate due to human reasons, and the problem of the connection state of the grounding device cannot be found. Meanwhile, the manual inspection cycle is long, the problem can be found only by next detection when the problem occurs, and the neutral period can cause great loss due to the problems that the lightning stroke energy cannot be effectively discharged and the like, so that the electrical integrity of the grounding device cannot be effectively managed.
Disclosure of Invention
In order to solve the problems, the invention provides a method for processing and analyzing test data of the electrical integrity of a grounding device of a traction substation.
In order to achieve the above object, an embodiment of the present invention provides a method for processing and analyzing test data of electrical integrity of a grounding device of a traction substation, which is characterized in that:
the method comprises the following steps:
acquiring a direct current resistance test value between a reference point and a measured point tested device;
and determining electrical integrity information according to the direct current resistance test value and the direct current resistance early warning value.
Further, the electrical integrity information includes: good connection condition, bad connection condition and no connection.
Further, the dc resistance warning value includes: the device comprises a first direct current resistance early warning value, a second direct current resistance early warning value and a third direct current resistance early warning value, wherein the second direct current resistance early warning value is larger than the first direct current resistance early warning value, and the third direct current resistance early warning value is larger than the second direct current resistance early warning value.
Further, according to the direct current resistance test value and the direct current resistance early warning value, electrical integrity information is determined, and the method comprises the following steps:
when the direct current resistance test value is judged to be smaller than the first direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is good in connection state;
and/or the presence of a gas in the gas,
when the direct current resistance test value is judged to be larger than or equal to the first direct current resistance early warning value and smaller than or equal to the second direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is still in a connection state;
and/or the presence of a gas in the gas,
when the direct current resistance test value is judged to be larger than or equal to the second direct current resistance early warning value and smaller than or equal to the third direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is in a poor connection condition;
and/or the presence of a gas in the gas,
and when the direct current resistance test value is judged to be larger than or equal to a third direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is not connected.
Further, after the determining the electrical integrity information, the method further includes: displaying the determined electrical integrity information.
Further, before acquiring a direct current resistance test value between the reference point on the acquisition side and the device under test at the measurement point, the method further comprises the following steps: selecting a reference point;
further, the selecting the reference point specifically refers to selecting a ground terminal that is well connected with the integrated ground system as the reference point.
When the direct current resistance test value of the tested equipment at the measuring point is larger than the first direct current resistance early warning value, early warning is carried out, and measurement and verification are carried out repeatedly;
and when the direct current resistance test value of the equipment to be tested at the multiple measurement points is greater than the first direct current resistance early warning value, early warning is carried out, and the reference point is replaced for measurement.
Further, the first dc resistance early warning value is 50m Ω, the second dc resistance early warning value is 200m Ω, and the second dc resistance early warning value is 1 Ω.
Further, the environmental temperature is recorded when the direct current resistance test value between the reference point and the measured point tested device is obtained.
Further, the distance between the measured equipment of the measuring point and the reference point is less than or equal to 300 meters.
The method for processing and analyzing the test data of the electrical integrity of the grounding device of the traction substation has the beneficial effects that: can regularly carry out the electrical integrity test to earthing device, through measuring point equipment under test's electrical integrity information, can make things convenient for the staff to know the condition of measuring point equipment under test connection state, according to measuring point equipment under test's electrical integrity information, can also carry out the test frequency adjustment to variable measuring point equipment under test, if variable measuring point equipment under test's connection state is bad, can the early warning and increase measuring frequency, strengthened the management to measuring point equipment under test connection state. .
Drawings
Fig. 1 is a flowchart illustrating steps of a method for processing and analyzing test data of electrical integrity of a traction substation grounding device according to embodiment 1 of the present invention;
fig. 2 is a flowchart illustrating steps of a method for processing and analyzing test data of electrical integrity of a traction substation grounding device according to embodiment 2 of the present invention;
fig. 3 is a flowchart illustrating steps of a method for processing and analyzing test data of electrical integrity of a grounding device of a traction substation according to embodiment 3 of the present invention;
fig. 4 is a flowchart illustrating steps of a method for processing and analyzing test data of electrical integrity of a grounding device of a traction substation according to embodiment 4 of the present invention;
fig. 5 is a test point layout diagram of a test data processing and analyzing method for electrical integrity of a traction substation grounding device according to embodiment 12 of the present invention.
Detailed Description
The following describes the method for processing and analyzing the test data of the electrical integrity of the grounding device of the traction substation in detail with reference to the accompanying drawings.
The method for processing and analyzing the test data of the electrical integrity of the grounding device of the traction substation comprises the following steps:
acquiring a direct current resistance test value between a reference point and a measured point tested device;
and determining electrical integrity information according to the direct current resistance test value and the direct current resistance early warning value.
The electrical integrity information includes: good connection condition, bad connection condition and no connection.
The DC resistance early warning value comprises the following steps: the device comprises a first direct current resistance early warning value, a second direct current resistance early warning value and a third direct current resistance early warning value, wherein the second direct current resistance early warning value is larger than the first direct current resistance early warning value, and the third direct current resistance early warning value is larger than the second direct current resistance early warning value.
Further, according to the direct current resistance test value and the direct current resistance early warning value, electrical integrity information is determined, and the method comprises the following steps:
when the direct current resistance test value is judged to be smaller than the first direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is good in connection state;
and/or the presence of a gas in the gas,
when the direct current resistance test value is judged to be larger than or equal to the first direct current resistance early warning value and smaller than or equal to the second direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is still in a connection state;
and/or the presence of a gas in the gas,
when the direct current resistance test value is judged to be larger than or equal to the second direct current resistance early warning value and smaller than or equal to the third direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is in a poor connection condition;
and/or the presence of a gas in the gas,
and when the direct current resistance test value is judged to be larger than or equal to the third direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is not connected.
After determining the electrical integrity information, further comprising: displaying the determined electrical integrity information.
Before collecting the direct current resistance test value between the reference point and the measured point tested device, the method further comprises the following steps: selecting a reference point;
the reference point is specifically selected as a reference point by selecting a ground terminal which is well connected with the comprehensive grounding system.
When the direct current resistance test value of the tested equipment at the measuring point is larger than the first direct current resistance early warning value, early warning is carried out, and measurement and verification are carried out repeatedly;
and when the direct current resistance test value of the equipment to be tested at the multiple measurement points is greater than the first direct current resistance early warning value, early warning is carried out, and the reference point is replaced for measurement.
The first direct current resistance early warning value is 50m omega, the second direct current resistance early warning value is 200m omega, and the second direct current resistance early warning value is 1 omega.
And recording the environment temperature when acquiring the direct current resistance test value between the reference point and the tested device at the measuring point.
The distance between the measured equipment of the measuring point and the reference point is less than or equal to 300 meters.
Example 1
The method for processing and analyzing the test data of the electrical integrity of the grounding device of the traction substation comprises the following steps:
and 102, determining electrical integrity information according to the direct current resistance test value and the direct current resistance early warning value.
Example 2
The method for processing and analyzing the test data of the electrical integrity of the grounding device of the traction substation comprises the following steps:
and step 103, displaying the determined electrical integrity information.
Example 3
and 203, determining electrical integrity information according to the direct current resistance test value and the direct current resistance early warning value.
Example 4
and 203, determining electrical integrity information according to the direct current resistance test value and the direct current resistance early warning value.
And step 204, displaying the determined electrical integrity information.
Example 5
The method for processing and analyzing the test data of the electrical integrity of the grounding device of the traction substation comprises the following steps:
and 102, determining electrical integrity information according to the direct current resistance test value and the direct current resistance early warning value.
Wherein the electrical integrity information in step 102 comprises: good connection condition, bad connection condition and no connection.
Example 6
The method for processing and analyzing the test data of the electrical integrity of the grounding device of the traction substation comprises the following steps:
and 102, determining electrical integrity information according to the direct current resistance test value and the direct current resistance early warning value.
Wherein, the electrical integrity information in step 102 includes: good connection condition, bad connection condition and no connection.
Wherein, the dc resistance early warning value in step 102 includes: the device comprises a first direct current resistance early warning value, a second direct current resistance early warning value and a third direct current resistance early warning value, wherein the second direct current resistance early warning value is larger than the first direct current resistance early warning value, and the third direct current resistance early warning value is larger than the second direct current resistance early warning value.
Example 7
The method for processing and analyzing the test data of the electrical integrity of the grounding device of the traction substation comprises the following steps:
and 102, determining electrical integrity information according to the direct current resistance test value and the direct current resistance early warning value.
Wherein, the electrical integrity information in step 102 includes: good connection condition, bad connection condition and no connection.
Wherein, the dc resistance early warning value in step 102 includes: the device comprises a first direct current resistance early warning value, a second direct current resistance early warning value and a third direct current resistance early warning value, wherein the second direct current resistance early warning value is larger than the first direct current resistance early warning value, and the third direct current resistance early warning value is larger than the second direct current resistance early warning value.
Wherein, according to the dc resistance test value and the dc resistance early warning value, determining electrical integrity information in step 102 includes:
when the direct current resistance test value is judged to be smaller than the first direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is good in connection state;
and/or the presence of a gas in the gas,
when the direct current resistance test value is judged to be larger than or equal to the first direct current resistance early warning value and smaller than or equal to the second direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is still in a connection state;
and/or the presence of a gas in the gas,
when the direct current resistance test value is judged to be larger than or equal to the second direct current resistance early warning value and smaller than or equal to the third direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is in a poor connection condition;
and/or the presence of a gas in the gas,
and when the direct current resistance test value is judged to be larger than or equal to the third direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is not connected.
Example 8
The method for processing and analyzing the test data of the electrical integrity of the grounding device of the traction substation comprises the following steps:
Wherein, the dc resistance early warning value in step 102 includes: the device comprises a first direct current resistance early warning value, a second direct current resistance early warning value and a third direct current resistance early warning value, wherein the second direct current resistance early warning value is larger than the first direct current resistance early warning value, and the third direct current resistance early warning value is larger than the second direct current resistance early warning value.
According to the direct current resistance test value and the direct current resistance early warning value, electrical integrity information is determined, and the method comprises the following steps:
when the direct current resistance test value is judged to be smaller than the first direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is good in connection state;
and/or the presence of a gas in the gas,
when the direct current resistance test value is judged to be larger than or equal to the first direct current resistance early warning value and smaller than or equal to the second direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is still in a connection state;
and/or the presence of a gas in the gas,
when the direct current resistance test value is judged to be larger than or equal to the second direct current resistance early warning value and smaller than or equal to the third direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is in a poor connection condition;
and/or the presence of a gas in the gas,
and when the direct current resistance test value is judged to be larger than or equal to the third direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is not connected.
And step 103, displaying the determined electrical integrity information.
Example 9
The method for processing and analyzing the test data of the electrical integrity of the grounding device of the traction substation comprises the following steps:
the selecting the reference point specifically refers to selecting a ground terminal which is well connected with the comprehensive grounding system as the reference point.
and 203, determining electrical integrity information according to the direct current resistance test value and the direct current resistance early warning value.
Wherein, the electrical integrity information in step 203 includes: good connection condition, bad connection condition and no connection.
Wherein, the dc resistance early warning value in step 203 includes: the device comprises a first direct current resistance early warning value, a second direct current resistance early warning value and a third direct current resistance early warning value, wherein the second direct current resistance early warning value is larger than the first direct current resistance early warning value, and the third direct current resistance early warning value is larger than the second direct current resistance early warning value.
According to the direct current resistance test value and the direct current resistance early warning value, electrical integrity information is determined, and the method comprises the following steps:
in step 203, when it is determined that the dc resistance test value is smaller than the first dc resistance early warning value, it is determined that the electrical integrity information of the device under test at the measurement point is good in connection status;
and/or the presence of a gas in the gas,
when the direct current resistance test value is judged to be larger than or equal to the first direct current resistance early warning value and smaller than or equal to the second direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is still in a connection state;
and/or the presence of a gas in the gas,
when the direct current resistance test value is judged to be larger than or equal to the second direct current resistance early warning value and smaller than or equal to the third direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is in a poor connection condition;
and/or the presence of a gas in the gas,
and when the direct current resistance test value is judged to be larger than or equal to the third direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is not connected.
Example 10
The method for processing and analyzing the test data of the electrical integrity of the grounding device of the traction substation comprises the following steps:
the selecting the reference point specifically refers to selecting a ground terminal which is well connected with the comprehensive grounding system as the reference point.
and 203, determining electrical integrity information according to the direct current resistance test value and the direct current resistance early warning value. According to the direct current resistance test value and the direct current resistance early warning value, electrical integrity information is determined, and the method comprises the following steps:
wherein, the electrical integrity information in step 203 includes: good connection condition, bad connection condition and no connection.
Wherein, the dc resistance early warning value in step 203 includes: the device comprises a first direct current resistance early warning value, a second direct current resistance early warning value and a third direct current resistance early warning value, wherein the second direct current resistance early warning value is larger than the first direct current resistance early warning value, and the third direct current resistance early warning value is larger than the second direct current resistance early warning value.
When the direct current resistance test value is judged to be smaller than the first direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is good in connection state;
and/or the presence of a gas in the gas,
when the direct current resistance test value is judged to be larger than or equal to the first direct current resistance early warning value and smaller than or equal to the second direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is still in a connection state;
and/or the presence of a gas in the gas,
when the direct current resistance test value is judged to be larger than or equal to the second direct current resistance early warning value and smaller than or equal to the third direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is in a poor connection condition;
and/or the presence of a gas in the gas,
and when the direct current resistance test value is judged to be larger than or equal to the third direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is not connected.
And step 204, displaying the determined electrical integrity information.
Example 11
The method for processing and analyzing the test data of the electrical integrity of the grounding device of the traction substation comprises the following steps:
the selecting the reference point specifically refers to selecting a ground terminal which is well connected with the comprehensive grounding system as the reference point.
and 203, determining electrical integrity information according to the direct current resistance test value and the direct current resistance early warning value. According to the direct current resistance test value and the direct current resistance early warning value, electrical integrity information is determined, and the method comprises the following steps:
wherein, the electrical integrity information in step 203 includes: good connection condition, bad connection condition and no connection.
Wherein, the dc resistance early warning value in step 203 includes: the device comprises a first direct current resistance early warning value, a second direct current resistance early warning value and a third direct current resistance early warning value, wherein the second direct current resistance early warning value is larger than the first direct current resistance early warning value, and the third direct current resistance early warning value is larger than the second direct current resistance early warning value.
When the direct current resistance test value is judged to be smaller than the first direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is good in connection state;
and/or the presence of a gas in the gas,
when the direct current resistance test value is judged to be larger than or equal to the first direct current resistance early warning value and smaller than or equal to the second direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is still in a connection state;
and/or the presence of a gas in the gas,
when the direct current resistance test value is judged to be larger than or equal to the second direct current resistance early warning value and smaller than or equal to the third direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is in a poor connection condition;
and/or the presence of a gas in the gas,
and when the direct current resistance test value is judged to be larger than or equal to the third direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is not connected.
When the direct current resistance test value of the tested equipment at the measuring point is larger than the first direct current resistance early warning value, early warning is carried out, and measurement and verification are carried out repeatedly;
and when the direct current resistance test value of the equipment to be tested at the multiple measurement points is greater than the first direct current resistance early warning value, early warning is carried out, and the reference point is replaced for measurement.
The first direct current resistance early warning value is 50m omega, the second direct current resistance early warning value is 200m omega, and the second direct current resistance early warning value is 1 omega.
And recording the environmental temperature when acquiring the direct current resistance test value between the reference point and the tested device at the measuring point so as to evaluate the influence of the temperature on the direct current resistance test value.
And step 204, displaying the determined electrical integrity information.
The test result is judged and processed according to the following requirements:
a) and the direct current resistance test value is below 50m omega, the electrical integrity information of the measurement point is determined to be good in connection condition, and the information is displayed on the display unit.
b) The direct current resistance test value is 50-200 m omega, the electrical integrity information of the measurement point is determined to be the correct connection condition, the measurement point is displayed and early warned on the display unit, the change of the measurement point is recommended to be focused in the routine test later, and important equipment is suitable for being checked and processed at proper time.
c) And the direct current resistance test value is 200m omega-1 omega, the electrical integrity information of the measurement point is determined to be bad in connection condition, the information is displayed and early warned on a display unit, important equipment is recommended to be checked and processed as soon as possible, and other equipment is preferably checked and processed at proper time.
d) And the direct current resistance test value is more than 1 omega, the electrical integrity information of the measurement point is determined to be unconnected, namely the tested device is not connected with the main ground network, the information is displayed and early warned on a display unit, and the information is recommended to be checked and processed as soon as possible.
e) The relative value of the DC resistance test value of the tested equipment at the measuring point is obviously higher than that of other equipment, while the absolute value is smaller than the first DC resistance early warning value 50m omega, the electrical integrity information of the measuring point is determined to be in a correct connection state, and the change of the measuring point is recommended to pay attention in the routine test later, and important equipment is suitable for being checked and processed at proper time.
Example 12
In a power distribution system, a transformer is used as a core device to change the magnitude of an alternating voltage and to supply a proper voltage to a power distribution circuit. In order to ensure that the transformer is in a safe working state, the electrical integrity of the transformer needs to be tested.
In this embodiment, four transformers are disposed in the traction substation, which are respectively a first transformer, a second transformer, a third transformer, and a fourth transformer.
The method for processing and analyzing the test data of the electrical integrity of the transformer in the traction substation comprises the following steps:
the selecting the reference point specifically refers to selecting a ground terminal which is well connected with the comprehensive grounding system as the reference point.
In this embodiment the first test pole is selected on the second transformer housing as a reference point,
specifically, the method comprises the following steps: measuring by using an equipotential connection resistance tester to obtain a direct current resistance test value between a reference point and a measured point tested device;
the potential connection resistance tester is connected with a first test electrode through a detection wiring, and the first test electrode is connected to a grounding terminal connected with the comprehensive grounding system and used as a reference point;
the potential connection resistance tester is respectively connected with the second test pole, the third test pole, the fourth test pole and the fifth test pole through detection wiring, and the second test pole, the third test pole, the fourth test pole and the fifth test pole are respectively connected with the tested first transformer, the second transformer, the third transformer and the fourth transformer to be used as test points.
The second test pole, the third test pole, the fourth test pole and the fifth test pole are connected to a point connected with the comprehensive grounding system, the first test pole is selected on the second transformer shell as a reference point in the embodiment, and the second test pole, the third test pole, the fourth test pole and the fifth test pole are respectively arranged on the first transformer, the second transformer, the third transformer and the fourth transformer shell and are less than or equal to 300 meters away from the first test pole.
The direct current resistance test values of the second test pole of the measuring point, the third test pole of the measuring point, the fourth test pole of the measuring point and the fifth test pole of the measuring point are 1.3m omega, 1.2m omega, 1.3m omega and 1.3 omega respectively.
And 102, determining electrical integrity information according to the direct current resistance test value and the direct current resistance early warning value.
The DC resistance early warning value comprises the following steps: the device comprises a first direct current resistance early warning value, a second direct current resistance early warning value and a third direct current resistance early warning value, wherein the second direct current resistance early warning value is larger than the first direct current resistance early warning value, and the third direct current resistance early warning value is larger than the second direct current resistance early warning value.
When the direct current resistance test value is judged to be smaller than the first direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is good in connection state; and/or the presence of a gas in the gas,
when the direct current resistance test value is judged to be larger than or equal to the first direct current resistance early warning value and smaller than or equal to the second direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is still in a connection state;
and/or the presence of a gas in the gas,
when the direct current resistance test value is judged to be larger than or equal to the second direct current resistance early warning value and smaller than or equal to the third direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is in a poor connection condition;
and/or the presence of a gas in the gas,
and when the direct current resistance test value is judged to be larger than or equal to the third direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is not connected.
When the direct current resistance test value of the tested equipment at the measuring point is larger than the first direct current resistance early warning value, early warning is carried out, and measurement and verification are carried out repeatedly;
and when the direct current resistance test value of the equipment to be tested at the multiple measurement points is greater than the first direct current resistance early warning value, early warning is carried out, and the reference point is replaced for measurement.
The first direct current resistance early warning value is 50m omega, the second direct current resistance early warning value is 200m omega, and the second direct current resistance early warning value is 1 omega.
The test result is judged and processed according to the following requirements:
a) and the direct current resistance test value is below 50m omega, the electrical integrity information of the measurement point is determined to be good in connection condition, and the information is displayed on the display unit.
b) The direct current resistance test value is 50-200 m omega, the electrical integrity information of the measurement point is determined to be the correct connection condition, the measurement point is displayed and early warned on the display unit, the change of the measurement point is recommended to be focused in the routine test later, and important equipment is suitable for being checked and processed at proper time.
c) And the direct current resistance test value is 200m omega-1 omega, the electrical integrity information of the measurement point is determined to be bad in connection condition, the information is displayed and early warned on a display unit, important equipment is recommended to be checked and processed as soon as possible, and other equipment is preferably checked and processed at proper time.
d) And the direct current resistance test value is more than 1 omega, the electrical integrity information of the measurement point is determined to be unconnected, namely the tested device is not connected with the main ground network, the information is displayed and early warned on a display unit, and the information is recommended to be checked and processed as soon as possible.
In this embodiment, the dc resistance test values of the second test pole, the third test pole, the fourth test pole and the fifth test pole are respectively 1.3m Ω, 1.2m Ω, 1.3m Ω and 1.3 Ω, and are all less than the first dc resistance early warning value and are 50m Ω, and it is determined that the electrical integrity information of the first transformer connected to the second test pole, the second transformer connected to the third test pole, the third transformer connected to the fourth test pole and the fourth transformer connected to the fifth test pole is good.
Example 13
The following technical means are included in addition to the technical means of example 12;
the relative value of the DC resistance test value of the tested equipment at the measuring point is obviously higher than that of other equipment, while the absolute value is smaller than the first DC resistance early warning value, the electrical integrity information of the measuring point is determined to be in a satisfactory connection state, the change of the measuring point is recommended to be focused in the routine test later, and the important equipment is suitable for being checked and processed at proper time.
In this embodiment, the dc resistance test values of the second test pole of the measurement point, the third test pole of the measurement point, and the fourth test pole of the measurement point are 1.3m Ω, 1.2m Ω, 1.3m Ω, and 45m Ω, respectively, and are all smaller than the first dc resistance early warning value 50m Ω, and it is determined that the electrical integrity information of the first transformer connected to the second test pole of the measurement point, the second transformer connected to the third test pole of the measurement point, and the third transformer connected to the fourth test pole of the measurement point is good in connection status;
the direct current resistance test value of the fourth transformer of the fifth test pole of the measurement point is 45m omega, although the direct current resistance test value is smaller than the first direct current resistance early warning value 50m omega, the direct current resistance test value is obviously higher than the direct current resistance test values of the second test pole of the measurement point, the third test pole of the measurement point, the fourth test pole of the measurement point and the direct current resistance test values measured, and the electrical integrity information of the measurement point is determined to be that the connection condition is still acceptable.
Example 14
Besides the technical proposal of the embodiment 12, the method also comprises the following technical proposal:
when the direct current resistance test value of the tested equipment at the measuring point is larger than the first direct current resistance early warning value, early warning is carried out, and measurement and verification are carried out repeatedly;
in this embodiment, the test values of the direct current resistances measured by the second test pole, the third test pole and the fourth test pole are respectively 1.3m Ω, 1.2m Ω, 1.3m Ω and 58m Ω,
the direct current resistance test values of the second test electrode of the measurement point, the third test electrode of the measurement point and the fourth test electrode of the measurement point are respectively 1.3m omega, 1.2m omega and 1.3m omega, and are all smaller than the first direct current resistance early warning value of 50m omega, and the electrical integrity information of the first transformer connected with the second test electrode of the measurement point, the second transformer connected with the third test electrode of the measurement point and the third transformer connected with the fourth test electrode of the measurement point is determined to be good in connection state;
the direct current resistance test value of the fourth transformer of the fifth test pole of the measurement point is 58m omega, is greater than the first direct current resistance early warning value by 50m omega, is less than the second direct current resistance early warning value by 200m omega and is less than the second direct current resistance early warning value by 200m omega, early warning and repeated measurement verification are carried out, the measurement verification frequency is greater than or equal to 3 times, and the accuracy and reliability of measurement data are ensured. (ii) a And if the tested values of the direct current resistances verified by measurement are both greater than the first direct current resistance early warning value of 50m omega and less than the second direct current resistance early warning value of 200m omega, determining that the electrical integrity information of the measured point is still connected, displaying and early warning on a display unit, and suggesting that the change is focused in the routine test later, and important equipment is preferably checked and processed at proper time.
Example 15
Besides the technical proposal of the embodiment 12, the method also comprises the following technical proposal:
and when the direct current resistance test value of the equipment to be tested at the multiple measurement points is greater than the first direct current resistance early warning value, early warning is carried out, and the reference point is replaced for measurement.
In this embodiment, the test values of the dc resistances measured by the second test pole, the third test pole and the fourth test pole are 62m Ω, 70m Ω, 56m Ω and 58m Ω, respectively.
The direct current resistance test values measured by the second measuring point testing electrode, the third measuring point testing electrode and the fourth measuring point testing electrode of the measuring point are respectively 62m omega, 70m omega, 56m omega and 58m omega which are larger than the early warning value of the first direct current resistance by 50m omega and smaller than the early warning value of the second direct current resistance, each measuring point carries out early warning and repeated measurement and verification, and the measurement and verification times are more than or equal to 3 times; if the direct current resistance test values verified by the measurement of each measurement point are larger than the first direct current resistance early warning value of 50m omega, early warning is carried out, the reference point is replaced, measurement is carried out again, and the accuracy and reliability of measurement data are guaranteed.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and all such changes or substitutions are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The method for processing and analyzing the test data of the electrical integrity of the grounding device of the traction substation is characterized by comprising the following steps of:
acquiring a direct current resistance test value between a reference point and a measured point tested device;
and determining electrical integrity information according to the direct current resistance test value and the direct current resistance early warning value.
2. The method for processing and analyzing the test data of the electrical integrity of the grounding device of the traction substation according to claim 2, wherein the electrical integrity information comprises: good connection condition, bad connection condition and no connection.
3. The method for processing and analyzing the test data of the electrical integrity of the grounding device of the traction substation according to claim 1, wherein the dc resistance early warning value comprises: the device comprises a first direct current resistance early warning value, a second direct current resistance early warning value and a third direct current resistance early warning value, wherein the second direct current resistance early warning value is larger than the first direct current resistance early warning value, and the third direct current resistance early warning value is larger than the second direct current resistance early warning value.
4. The method for processing and analyzing the test data of the electrical integrity of the grounding device of the traction substation according to claim 3, wherein the step of determining the electrical integrity information according to the direct current resistance test value and the direct current resistance early warning value comprises the following steps:
when the direct current resistance test value is judged to be smaller than the first direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is good in connection state;
and/or the presence of a gas in the gas,
when the direct current resistance test value is judged to be larger than or equal to the first direct current resistance early warning value and smaller than or equal to the second direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is still in a connection state;
and/or the presence of a gas in the gas,
when the direct current resistance test value is judged to be larger than or equal to the second direct current resistance early warning value and smaller than or equal to the third direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is in a poor connection condition;
and/or the presence of a gas in the gas,
and when the direct current resistance test value is judged to be larger than or equal to a third direct current resistance early warning value, determining that the electrical integrity information of the tested equipment at the measuring point is not connected.
5. The method of claim 1, further comprising, after said determining electrical integrity information: displaying the determined electrical integrity information.
6. The method according to claim 1 or 5, characterized in that before acquiring the DC resistance test value between the reference point at the acquisition side and the device under test at the measurement point, the method further comprises: selecting a reference point;
the reference point is specifically selected as a reference point by selecting a ground terminal which is well connected with the comprehensive grounding system.
7. The method for processing and analyzing the test data of the electrical integrity of the grounding device of the traction substation according to claim 4, wherein when the test value of the direct current resistance of the tested equipment at the measuring point is greater than the early warning value of the first direct current resistance, early warning and repeated measurement and verification are performed;
and when the direct current resistance test value of the equipment to be tested at the multiple measurement points is greater than the first direct current resistance early warning value, early warning is carried out, and the reference point is replaced for measurement.
8. The method for processing and analyzing the test data of the electrical integrity of the traction substation grounding device according to claim 3, 4 or 8, wherein the first direct current resistance early warning value is 50m Ω, the second direct current resistance early warning value is 200m Ω, and the second direct current resistance early warning value is 1 Ω.
9. The method for processing and analyzing the test data of the electrical integrity of the grounding device of the traction substation according to claim 1, wherein the environmental temperature is recorded when a test value of the direct current resistance between the reference point and the tested device at the measuring point is obtained.
10. The method for processing and analyzing the test data of the electrical integrity of the grounding device of the traction substation as recited in claim 1, wherein the distance between the tested equipment at the measuring point and the reference point is less than or equal to 300 meters.
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| CN202010366781.1A CN112782615A (en) | 2020-04-30 | 2020-04-30 | Test data processing and analyzing method for electrical integrity of traction substation grounding device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114137340A (en) * | 2021-11-23 | 2022-03-04 | 广西电网有限责任公司来宾供电局 | Transformer substation conduction tester with remote control function |
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