CN112816905A - Logic method for selecting test point location to carry out grounding information detection - Google Patents
Logic method for selecting test point location to carry out grounding information detection Download PDFInfo
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- CN112816905A CN112816905A CN202011453765.2A CN202011453765A CN112816905A CN 112816905 A CN112816905 A CN 112816905A CN 202011453765 A CN202011453765 A CN 202011453765A CN 112816905 A CN112816905 A CN 112816905A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
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Abstract
The invention provides a logic method for detecting grounding information by selecting test point positions, which comprises a comprehensive grounding on-line monitoring substation system and a comprehensive grounding on-line monitoring main station system which are in communication connection, wherein the comprehensive grounding on-line monitoring substation system comprises a comprehensive grounding on-line monitoring screen, a display interaction unit of the comprehensive grounding on-line monitoring screen is in communication connection with a comprehensive grounding control unit, the display interaction unit is in communication connection with the comprehensive grounding on-line monitoring main station system, and the comprehensive grounding control unit is in control connection with a measurement switching relay group. The invention has the beneficial effects that: the method comprises the steps of setting a plurality of measuring point positions for measuring different ground grid parameters, controlling a measuring switching relay set according to the measuring positions as required, switching a measuring electric signal to a corresponding testing position, controlling testing equipment according to the type to be tested, enabling the testing equipment to work in a corresponding measuring mode, modifying and adjusting a control flow of a comprehensive grounding control unit when each point position is measured, and realizing multi-point measurement through one testing equipment.
Description
Technical Field
The invention belongs to the field of grounding, and particularly relates to a logic method for detecting grounding information by selecting test point positions.
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 common fault situations of the railway comprehensive grounding system, such as a ground rod or a ground grid, can cause overlarge grounding resistance and even loss of the grounding function because of being buried in the ground for a long time and being affected with damp and rusted; 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 electrical connections between the ground rods or grids, the equipment earthing and the operating points are broken for some reason, which can lead to damage of one or more traction substations due to poor earthing.
In order to ensure the safe operation of a railway system and have strict requirements on grounding resistance, a grounding device is arranged along a railway, and when the railway site condition changes, the grounding device needs to be found and processed in time; at present, a portable grounding resistance tester is mostly adopted for testing the grounding resistance of a grounding network, the single measurement project can be realized, besides the grounding resistance measurement, the soil resistivity measurement, the electrical integrity measurement of a railway comprehensive grounding system, the grounding impedance measurement of the railway comprehensive grounding system, the field surface gradient, the step voltage and the contact voltage measurement (the track potential and the equipment potential measurement of the railway comprehensive grounding system) are also required to be carried out for the railway comprehensive grounding, a plurality of test equipment are required to be matched for use to realize the measurements, the measurement cost is high, the time consumption is long, and the measurement time is long
Disclosure of Invention
In order to solve the above problems, embodiments of the present invention provide a logic method for selecting test points to perform ground information detection, where test devices (a ground grid ground resistance tester, a frequency-selective voltmeter, and an equipotential connection resistance tester) are controlled according to types to be tested, so that the test devices operate in corresponding measurement modes, and a comprehensive ground control unit needs to modify and adjust a control flow when each point is measured, and thus, multi-point measurement is implemented by using one test device.
In order to achieve the above object, an embodiment of the present invention provides a logic method for selecting a test point location to perform ground fault information detection, which is characterized by including determining a location to be measured and a measurement function mode, controlling a measurement switching relay set, and performing switching control on the measurement function mode.
Further, the determining of the position to be measured and the measurement function mode specifically means determining the position to be measured and the measurement function mode through an instruction of the display interaction unit.
Further, the step of controlling the measurement switching relay set specifically means that the measurement switching relay set is controlled according to a required measurement position, so that the measurement electric signal is switched to a corresponding test position, and multi-point measurement is realized through one test device.
The test equipment comprises at least one of a ground network grounding resistance tester, a frequency-selecting voltmeter and an equipotential connecting resistance tester.
Furthermore, the measurement switching relay group is controlled according to the measurement position required by the measurement position electrode, and the measurement switching relay group is realized by the connection and disconnection of a line between the measurement position electrode and test equipment (an earth grid grounding resistance tester, a frequency selection voltmeter and an equipotential connection resistance tester).
Furthermore, the switching of the measured electric signal to the corresponding test position is specifically that a plurality of relays form a group and correspond to a plurality of test point positions, one end of the relay group is connected to the test equipment (a ground grid ground resistance tester, a frequency-selecting voltmeter and an equipotential connection resistance tester) after being connected by hands, the other end of the relay group is connected to the electrode of the tested position, and when a certain point position needs to be tested, the corresponding relay is switched on, and other relays are in a breaking state.
Furthermore, the switching control of the measurement function specifically includes selecting and supplying power to the test equipment according to the measurement function mode required, and controlling the selected test equipment (the earth grid grounding resistance tester and/or the frequency-selecting voltmeter and/or the equipotential connection resistance tester) to enable the test equipment to work in the corresponding measurement mode.
Further, the control of the selected test equipment (the earth grid ground resistance tester and/or the frequency-selecting voltmeter and/or the equipotential connection resistance tester) comprises the steps of sending a parameter configuration command, sending a starting command, collecting data and analyzing data change.
Further, the measurement function mode comprises a ground resistance measurement mode, a soil resistivity measurement mode, a step voltage measurement mode, a contact voltage measurement mode and an electrical integrity measurement mode.
Further, the method also comprises the step of uploading the measurement result.
Further, the uploading of the measurement result specifically means that the measurement result is sent to an upper computer or a display interaction unit.
The invention has the beneficial effects that: the method comprises the steps of setting a plurality of measuring point positions for measuring different ground network parameters, controlling a measuring switching relay set according to the measuring position as required, switching a measuring electric signal to a corresponding testing position, controlling testing equipment (a ground network grounding resistance tester, a frequency-selecting voltmeter and an equipotential connection resistance tester) according to the type to be tested, enabling the testing equipment to work in a corresponding measuring mode, modifying and adjusting a control flow of a comprehensive grounding control unit when each point position is measured, and realizing multi-point measurement through one testing equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from these without inventive effort.
FIG. 1 is a block diagram of a logic method for selecting a test point location for ground fault detection according to the present invention;
FIG. 2 is a schematic diagram of device connections of a logic method for selecting test points to perform step voltage detection according to embodiment 6 of the present invention;
FIG. 3 is a schematic diagram of the device connection of the logic method for selecting test points to perform ground resistance detection according to embodiment 7 of the present invention;
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The logic method for selecting the test point location to carry out the grounding information detection comprises the steps of determining a position to be measured and a measurement function mode, controlling a measurement switching relay set and switching and controlling the measurement function mode.
The step of determining the position to be measured and the measurement function mode specifically refers to determining the point position to be measured and the measurement function mode through an instruction of the display interaction unit.
The step of controlling the measurement switching relay group specifically means that the measurement switching relay group is controlled according to a required measurement position, so that the measurement electric signal is switched to a corresponding test position, and multi-point measurement is realized through one test device.
The test equipment comprises one or more of a ground network grounding resistance tester, a frequency-selecting voltmeter and an equipotential connection resistance tester.
The measurement switching relay group is controlled according to the position to be measured, and the measurement switching relay group is controlled through the connection and disconnection of a line between a measurement position electrode and test equipment (an earth grid grounding resistance tester, a frequency-selecting voltmeter and an equipotential connection resistance tester).
The method comprises the steps that the measured electric signals are switched to corresponding test positions, specifically, a plurality of relays form a group and correspond to a plurality of test point positions, one end of each relay group is connected to test equipment (a ground grid grounding resistance tester, a frequency-selecting voltmeter and an equipotential connection resistance tester) after being connected by hands with the same functional terminal, the other end of each relay group is connected to an electrode of the tested position, when the certain point position needs to be tested, the corresponding relay is conducted, and other relays are in a breaking state.
The switching control of the measurement function specifically comprises the steps of selecting test equipment according to a measurement function mode required, supplying power, and controlling the selected test equipment (an earth grid grounding resistance tester and/or a frequency-selecting voltmeter and/or an equipotential connection resistance tester) to enable the test equipment to work in a corresponding measurement mode.
The control of the selected test equipment (the earth network grounding resistance tester and/or the frequency-selecting voltmeter and/or the equipotential connecting resistance tester) comprises the steps of sending a parameter configuration command, sending a starting command, collecting data and analyzing data change.
The measurement function mode comprises a ground resistance measurement mode, a soil resistivity measurement mode, a step voltage measurement mode, a contact voltage measurement mode and an electrical integrity measurement mode.
And uploading the measurement result.
The uploading of the measurement result specifically refers to sending the measurement result to an upper computer or a display interaction unit.
Example 1
The logic method for selecting the test point location to carry out the grounding information detection comprises the following steps:
the method comprises the following steps: determining a position to be measured and a measurement function mode;
step two: controlling the measurement switching relay set;
step three; and switching and controlling the measurement function mode.
Example 2
The logic method for selecting the test point location to carry out the grounding information detection comprises the following steps:
the method comprises the following steps: and determining the position to be measured and the measurement function mode, and determining the point position to be measured and the measurement function mode through the instruction of the display interaction unit.
Step two: and controlling the measurement switching relay set, controlling the measurement switching relay set according to the measurement position required, switching the measurement electric signal to the corresponding test position, and realizing multi-point measurement through one test device.
Step three; and switching and controlling the measurement function mode, selecting test equipment according to the measurement function mode as required, supplying power, and controlling the selected test equipment (a ground grid grounding resistance tester and/or a frequency-selecting voltmeter and/or an equipotential connection resistance tester) to enable the test equipment to work in the corresponding measurement mode.
Example 3
The logic method for selecting the test point location to carry out the grounding information detection comprises the following steps:
the method comprises the following steps: and determining the position to be measured and the measurement function mode, and determining the point position to be measured and the measurement function mode through the instruction of the display interaction unit.
Step two: and controlling the measurement switching relay set, controlling the measurement switching relay set according to the measurement position required, switching the measurement electric signal to the corresponding test position, and realizing multi-point measurement through one test device.
Step three; and switching and controlling the measurement function mode, selecting test equipment according to the measurement function mode as required, supplying power, and controlling the selected test equipment (a ground grid grounding resistance tester and/or a frequency-selecting voltmeter and/or an equipotential connection resistance tester) to enable the test equipment to work in the corresponding measurement mode.
Step four: and specifically, uploading the measurement result, and sending the measurement result to an upper computer or a display interaction unit.
Example 4
The logic method for selecting the test point location to carry out the grounding information detection comprises the following steps:
the method comprises the following steps: and determining the position to be measured and the measurement function mode, and determining the point position to be measured and the measurement function mode through the instruction of the display interaction unit.
Step two: controlling the measurement switching relay set according to a required measurement position, so that the measurement electric signal is switched to a corresponding test position, and realizing multi-point measurement through one test device;
the measurement switching relay group is controlled according to the position to be measured, and the measurement switching relay group is controlled through the connection and disconnection of a line between a measurement position electrode and test equipment (an earth grid grounding resistance tester, a frequency-selecting voltmeter and an equipotential connection resistance tester).
Step three; and switching and controlling the measurement function mode, selecting test equipment according to the measurement function mode as required, supplying power, and controlling the selected test equipment (a ground grid grounding resistance tester and/or a frequency-selecting voltmeter and/or an equipotential connection resistance tester) to enable the test equipment to work in the corresponding measurement mode.
Step four: and specifically, uploading the measurement result, and sending the measurement result to an upper computer or a display interaction unit.
Example 5
The logic method for selecting the test point location to carry out the grounding information detection comprises the following steps:
the method comprises the following steps: determining a position to be measured and a measurement function mode, and determining a point position to be measured and the measurement function mode through an instruction of a display interaction unit;
the measurement function mode comprises a ground resistance measurement mode, a soil resistivity measurement mode, a step voltage measurement mode, a contact voltage measurement mode and an electrical integrity measurement mode.
Step two: controlling the measurement switching relay set according to a required measurement position, so that the measurement electric signal is switched to a corresponding test position, and realizing multi-point measurement through one test device;
the measurement switching relay group is controlled according to the position to be measured, and the measurement switching relay group is controlled through the connection and disconnection of a line between a measurement position electrode and test equipment (an earth grid grounding resistance tester, a frequency-selecting voltmeter and an equipotential connection resistance tester).
The method comprises the steps that a plurality of relays form a group to be switched to corresponding test positions, the relays correspond to a plurality of test point positions, one end of each relay group is connected to test equipment (a ground grid grounding resistance tester, a frequency selection voltmeter and an equipotential connection resistance tester) after being connected by hands, the other end of each relay group is connected to an electrode of the tested position, when a certain point position needs to be tested, the corresponding relay is conducted, and other relays are in a breaking state.
Step three; and switching and controlling the measurement function mode, selecting test equipment according to the measurement function mode as required, supplying power, and controlling the selected test equipment (a ground grid grounding resistance tester and/or a frequency-selecting voltmeter and/or an equipotential connection resistance tester) to enable the test equipment to work in the corresponding measurement mode.
Step four: the measurement result is uploaded specifically, and the measurement result is sent to an upper computer or a display interaction unit
Example 6
For example, the logic method of selecting the test point location for detecting the grounding information,
1) receiving a display interaction unit instruction, and measuring the step voltage of the 2 nd point position;
2) controlling the relay of the measuring point 2 to be conducted, and the relays of other points to be completely disconnected;
3) starting a frequency-selective voltage and power supply of the grounding grid tester until the equipment stably operates;
4) sending a parameter configuration command to a ground grid tester to enable the tester to work in a working mode corresponding to the step voltage;
5) sending a parameter configuration command to the frequency selection voltmeter to enable the frequency selection voltmeter to work in a working mode corresponding to the step voltage;
6) sending a starting command to the ground screen tester, and reading the actual execution condition until the ground screen tester is normally started;
7) sending a starting command to the frequency-selecting voltmeter, simultaneously acquiring the acquired data, and analyzing (analyzing whether the conditions such as abnormity, disconnection and the like exist or not) according to the data change;
8) sending a stop command to the frequency selection voltmeter;
9) sending a stop command to the ground screen tester;
10) turning off the power supply of the frequency-selective voltage and ground net tester;
11) and sending the measurement result to an upper computer or a display interaction unit.
Example 7
For example, the logic method of measuring the grounding resistance, selecting the test point location for detecting the grounding information,
1) receiving a display interaction unit instruction, and measuring the grounding resistance of the 5 th point;
2) controlling the relays of the measuring points 5 to be conducted, and breaking all the relays of other point positions;
3) starting a power supply of the ground screen tester until the equipment stably operates;
4) sending a parameter configuration command to a ground grid tester to enable the tester to work in a working mode corresponding to the step voltage;
6) sending a starting command to the ground screen tester and reading the actual execution condition until the actual execution condition is positive
And starting the system. Acquiring collected data, and analyzing (analyzing whether abnormal conditions exist or not, line breakage and the like) according to data change;
7) sending a stop command to the ground screen tester;
8) turning off the power supply of the ground screen tester;
9) and sending the measurement result to an upper computer or a display interaction unit.
It should be noted that any of the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second, previous, next, etc. does not indicate any ordering. These words may be interpreted as names.
The above embodiments are only suitable for illustrating the present invention and not limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so that all equivalent technical solutions also belong to the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (10)
1. The logic method for selecting the test point location to carry out the grounding information detection is characterized by comprising the steps of determining a position to be measured and a measurement function mode, controlling a measurement switching relay set and switching and controlling the measurement function mode.
2. The logic method for selecting a test point location for ground information detection according to claim 1, wherein determining the location to be measured and the measurement function mode specifically means determining the location to be measured and the measurement function mode through an instruction of a display interaction unit.
3. The logic method for selecting test point locations to perform grounding information detection according to claim 1, wherein controlling the measurement switching relay set according to the location to be measured specifically means controlling the measurement switching relay set according to the location to be measured, so that the measurement electrical signals are switched to the corresponding test locations, and multi-point location measurement is realized through one test device;
the test equipment comprises at least one of a ground network grounding resistance tester, a frequency-selecting voltmeter and an equipotential connecting resistance tester.
4. The logic method for detecting grounding information by selecting test point locations according to claim 3, wherein the control of the measurement switching relay set is realized by conducting and breaking a line between a measurement position electrode and a test device.
5. The logic method for selecting test point locations to perform grounding information detection according to claim 3, wherein the switching of the measurement electrical signal to the corresponding test locations is specifically a group consisting of a plurality of relays, the group corresponding to the plurality of test point locations is connected to the test equipment after one end of the group is connected with the same functional terminal by hand, the other end of the group is connected to the electrode of the tested location, and when a certain point location needs to be tested, the corresponding relay is turned on, and then the other relays are in a breaking state.
6. The logic method for selecting test point locations to perform ground information detection according to claim 1, wherein switching control of the measurement function specifically includes selecting and supplying power to the test equipment according to a required measurement function mode, and controlling the selected test equipment so that the test equipment operates in a corresponding measurement mode.
7. The logic method for selecting test point locations to perform ground information detection according to claim 6, wherein controlling the selected test equipment comprises sending parameter configuration commands, sending start commands, collecting data, analyzing data changes;
the control of the selected test equipment comprises sending a parameter configuration command, sending a starting command, collecting data and analyzing data change.
8. The logic method for detecting grounding information by selecting test point locations according to claims 1-7, wherein the measurement function mode comprises a grounding resistance measurement mode, a soil resistivity measurement mode, a step voltage measurement mode, a contact voltage measurement mode and an electrical integrity measurement mode.
9. The logic method for selecting test point locations for ground information detection according to claim 1, further comprising uploading measurement results.
10. The logic method for selecting test point locations to perform grounding information detection according to claim 8, wherein the uploading of the measurement results specifically means sending the measurement results to an upper computer or a display interaction unit.
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Application publication date: 20210518 |