CN111724662A - Soil environment electric leakage simulation system and method - Google Patents
Soil environment electric leakage simulation system and method Download PDFInfo
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- CN111724662A CN111724662A CN202010674781.8A CN202010674781A CN111724662A CN 111724662 A CN111724662 A CN 111724662A CN 202010674781 A CN202010674781 A CN 202010674781A CN 111724662 A CN111724662 A CN 111724662A
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Abstract
The application provides a soil environment electric leakage simulation system and method. The soil environment electric leakage simulation system comprises a positive electrode, a negative electrode, an equivalent resistor and an insulating layer, wherein the positive electrode is a cylinder, the equivalent resistor is a hollow cylinder, the positive electrode is located in a hollow area of the equivalent resistor, the outer side surface of the positive electrode is in contact with the inner side surface of the equivalent resistor, the negative electrode wraps the outer side surface of the equivalent resistor, the positive electrode, the negative electrode and the equivalent resistor are mounted on the top surface of the insulating layer together, the positive electrode and the negative electrode are used for simulating the electric leakage condition of a real soil environment, and the equivalent resistor is used for simulating the equivalent resistance of. So, the soil environment electric leakage analog system that this application embodiment provided structure is simpler, because of adopting in the entire system is solid material, does not contain liquid material, is difficult to the electric leakage, and the security is higher when consequently using.
Description
Technical Field
The application relates to the technical field of safety simulation equipment, in particular to a soil environment electric leakage simulation system and method.
Background
The leakage of the outdoor public electric facilities is a common electric fault which endangers public safety, and the research on different occurrence states of the faults and the electric shock degree of things in the leakage range have very important significance. Because most public electric facilities are in a large space environment with intensive personnel, experimental research and professional training on the electric leakage environment of the facilities cannot be carried out in an outdoor real environment, and a physical model of the electric leakage environment needs to be established.
The real soil environment is easily affected by factors in multiple aspects such as weather conditions, terrains, soil texture and soil thickness, and further causes the difference of the electric leakage environment. In a soil environment electric leakage simulation system established in the prior art, various parts are very many, and the structure is complex; when the influence of rainwater on the soil environment is considered, an actual rainwater simulation device may be introduced, so that electric leakage is easily caused, and the safety is poor.
Based on this, there is a need for a soil environment electric leakage simulation system for solving the problems of complex system structure and poor safety in the prior art.
Disclosure of Invention
The application provides a soil environment electric leakage simulation system and method, which can be used for solving the technical problems of complex system structure and poor safety in the prior art.
In a first aspect, an embodiment of the present application provides a soil environment electric leakage simulation system, where the system includes: a positive electrode, a negative electrode, an equivalent resistor, and an insulating layer;
the positive electrode is in a cylinder shape and is arranged on the top surface of the insulating layer, the bottom surface of the positive electrode is in contact with the top surface of the insulating layer, and the radius of the bottom surface of the positive electrode is determined according to the potential of any position in the region to be simulated, the potential of the central position in the region to be simulated, the distance between the position and the central position in the region to be simulated and the excircle radius of the bottom surface of the equivalent resistor;
the equivalent resistor is in the shape of a hollow cylinder and is arranged on the top surface of the insulating layer, the height of the equivalent resistor is preset, and the excircle radius of the bottom surface of the equivalent resistor is preset;
the positive electrode is positioned in the hollow area of the equivalent resistor, the outer side face of the positive electrode is in contact with the inner side face of the equivalent resistor, and the height of the positive electrode is greater than or equal to that of the equivalent resistor;
the negative electrode is a layer of conductive material wrapped on the outer side surface of the equivalent resistor, the length of the negative electrode is determined according to the outer circumference of the bottom surface of the equivalent resistor, and the height of the negative electrode is the same as that of the equivalent resistor;
wherein:
the positive electrode is used for simulating the potential of the central position in the area to be simulated and is connected with the positive electrode of a preset external power supply;
the negative electrode is used for simulating zero potential in the region to be simulated and is connected with the negative electrode of the preset external power supply;
the equivalent resistor is used for simulating the resistance between the potential of the central position and the zero potential.
In an implementation manner of the first aspect, the potential of any one position in the area to be simulated is determined by the following steps:
acquiring soil information of an initial electric leakage soil environment, wherein the soil information comprises soil area, soil layer number, soil thickness and soil moisture content;
determining the equivalent soil resistivity of the area to be simulated according to the soil area, the soil layer number, the soil thickness and the soil water content;
determining an area to be simulated by taking the central position of the earth surface of the initial electric leakage soil environment as a circle center and the outer circle radius of the bottom surface of the equivalent resistor as a radius;
and aiming at any position in the region to be simulated, determining the potential of the position according to the potential of the central position in the region to be simulated, the equivalent soil resistivity, the distance between the position and the central position and the excircle radius of the bottom surface of the equivalent resistor.
In an implementation manner of the first aspect, the determining, according to the soil area, the number of soil layers, the soil thickness, and the soil moisture content, an equivalent soil resistivity of the area to be simulated includes:
and determining the equivalent soil resistivity of the area to be simulated by utilizing CEDGS software simulation according to the soil area, the soil layer number, the soil thickness and the soil water content.
In an implementation manner of the first aspect, the determining, for any one position in the area to be simulated, a potential of the position according to a potential of a central position in the area to be simulated, the equivalent soil resistivity, a distance between the position and the central position, and an outer circle radius of a bottom surface of the equivalent resistor, includes:
and aiming at any position in the region to be simulated, according to the potential of the central position in the region to be simulated, the equivalent soil resistivity, the distance between the position and the central position and the excircle radius of the bottom surface of the equivalent resistor, determining the potential of the position by utilizing CEDGS software simulation.
In an implementable manner of the first aspect, the radius of the bottom surface of the positive electrode is determined by the following formula:
wherein r1 is the radius of the bottom surface of the positive electrode, d is the distance between any position in the region to be simulated and the central position, U is the potential of the central position in the region to be simulated, L is the outer radius of the bottom surface of the equivalent resistor, and U (d) is the potential of any position in the region to be simulated.
In an implementable manner of the first aspect, the total resistance of the equivalent resistors is determined by:
determining the total resistance of the equivalent resistor according to the equivalent soil resistivity, the height of the equivalent resistor, the bottom surface excircle radius of the equivalent resistor and the bottom surface radius of the positive electrode.
In one implementation form of the first aspect, the total resistance of the equivalent resistor is determined by the following formula:
wherein R istotaldR is the resistance infinitesimal of the equivalent resistor, namely the resistivity of the equivalent resistor per unit volume; ρ is the equivalent soil resistivity, D is the height of the equivalent resistor, L is the bottom surface outer circle radius of the equivalent resistor, and r1 is the bottom surface radius of the positive electrode.
In a second aspect, an embodiment of the present application provides a soil environment electric leakage simulation method, where the method is applied to a soil environment electric leakage simulation system, and the system includes: a positive electrode, a negative electrode, an equivalent resistor, and an insulating layer;
the positive electrode is in a cylinder shape and is arranged on the top surface of the insulating layer, the bottom surface of the positive electrode is in contact with the top surface of the insulating layer, and the radius of the bottom surface of the positive electrode is determined according to the potential of any position in the region to be simulated, the potential of the central position in the region to be simulated, the distance between the position and the central position in the region to be simulated and the excircle radius of the bottom surface of the equivalent resistor;
the equivalent resistor is in the shape of a hollow cylinder and is arranged on the top surface of the insulating layer, the height of the equivalent resistor is preset, and the excircle radius of the bottom surface of the equivalent resistor is preset;
the positive electrode is positioned in the hollow area of the equivalent resistor, the outer side face of the positive electrode is in contact with the inner side face of the equivalent resistor, and the height of the positive electrode is greater than or equal to that of the equivalent resistor;
the negative electrode is a layer of conductive material wrapped on the outer side surface of the equivalent resistor, the length of the negative electrode is determined according to the outer circumference of the bottom surface of the equivalent resistor, and the height of the negative electrode is the same as that of the equivalent resistor;
the method comprises the following steps:
the positive electrode simulates the potential of the central position in the area to be simulated and is connected with the positive electrode of a preset external power supply;
the negative electrode simulates a zero potential in the region to be simulated and is connected with the negative electrode of the preset external power supply;
the equivalent resistor simulates a resistance between the potential of the center position and the zero potential.
In an implementable manner of the second aspect, the potential of any one position in the area to be simulated is determined by:
acquiring soil information of an initial electric leakage soil environment, wherein the soil information comprises soil area, soil layer number, soil thickness and soil moisture content;
determining the equivalent soil resistivity of the area to be simulated according to the soil area, the soil layer number, the soil thickness and the soil water content;
determining an area to be simulated by taking the central position of the earth surface of the initial electric leakage soil environment as a circle center and the outer circle radius of the bottom surface of the equivalent resistor as a radius;
and aiming at any position in the region to be simulated, determining the potential of the position according to the potential of the central position in the region to be simulated, the equivalent soil resistivity, the distance between the position and the central position and the excircle radius of the bottom surface of the equivalent resistor.
In an implementation manner of the second aspect, the determining an equivalent soil resistivity of the area to be simulated according to the soil area, the number of soil layers, the soil thickness, and the soil moisture content includes:
and determining the equivalent soil resistivity of the area to be simulated by utilizing CEDGS software simulation according to the soil area, the soil layer number, the soil thickness and the soil water content.
In an implementation manner of the second aspect, the determining, for any one position in the area to be simulated, the potential of the position according to the potential of the central position in the area to be simulated, the equivalent soil resistivity, the distance between the position and the central position, and the outer circle radius of the bottom surface of the equivalent resistor, includes:
and aiming at any position in the region to be simulated, according to the potential of the central position in the region to be simulated, the equivalent soil resistivity, the distance between the position and the central position and the excircle radius of the bottom surface of the equivalent resistor, determining the potential of the position by utilizing CEDGS software simulation.
In one implementation form of the second aspect, the radius of the bottom surface of the positive electrode is determined by the following formula:
wherein r1 is the radius of the bottom surface of the positive electrode, d is the distance between any position in the region to be simulated and the central position, U is the potential of the central position in the region to be simulated, L is the outer radius of the bottom surface of the equivalent resistor, and U (d) is the potential of any position in the region to be simulated.
In one realizable form of the second aspect, the total resistance of the equivalent resistors is determined by:
determining the total resistance of the equivalent resistor according to the equivalent soil resistivity, the height of the equivalent resistor, the bottom surface excircle radius of the equivalent resistor and the bottom surface radius of the positive electrode.
In one realizable form of the second aspect, the total resistance of the equivalent resistor is determined by the following equation:
wherein R istotaldR is the resistance infinitesimal of the equivalent resistor, namely the resistivity of the equivalent resistor per unit volume; ρ is the equivalent soil resistivity, D is the height of the equivalent resistor, L is the bottom surface outer circle radius of the equivalent resistor, and r1 is the bottom surface radius of the positive electrode.
So, the soil environment electric leakage analog system that this application embodiment provided simulates real soil environment's equivalent resistance through the equivalent resistor, simulates the electric leakage condition of real soil environment through positive electrode and negative electrode, and entire system structure is simpler, and it is more convenient to use, simultaneously because of adopting in the entire system be solid material, does not contain liquid material, is difficult to the electric leakage, and the security is higher when consequently using.
Drawings
Fig. 1 is a schematic structural diagram of a soil environment electric leakage simulation system according to an embodiment of the present application;
fig. 2a is a front view of a soil environment electric leakage simulation system provided in an embodiment of the present application;
fig. 2b is a top view of a soil environment leakage simulation system according to an embodiment of the present application;
fig. 2c is a cross-sectional view of a soil environment leakage simulation system according to an embodiment of the present application;
FIG. 3 is a diagram showing the simulation of potential distribution at various positions under different leakage current levels in a region to be simulated by using CEDGS software;
FIG. 4 is a simplified equivalent circuit of a soil environment leakage simulation system provided in an embodiment of the present application;
fig. 5 is a schematic diagram of potential distribution of the surface of the equivalent resistor under different voltages in the soil environment leakage simulation system according to the embodiment of the present application;
fig. 6 is a schematic diagram of potential distribution of the surface of the equivalent resistor under different positive electrode radii in the soil environment leakage simulation system according to the embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
In order to solve the problem, the embodiment of the application provides a soil environment electric leakage simulation system, which is specifically used for solving the problems that the system structure is complex, the use is inconvenient and the safety is poor in the prior art. Fig. 1 schematically shows a structural diagram of a soil environment electric leakage simulation system provided by an embodiment of the application. As shown in fig. 1, the simulation system has a function of realizing soil environment leakage simulation. Fig. 2a is a front view schematically illustrating a soil environment electric leakage simulation system provided by an embodiment of the present application; FIG. 2b is a top view schematically illustrating a soil environment electric leakage simulation system according to an embodiment of the present application; fig. 2c is a cross-sectional view schematically illustrating a soil environment electric leakage simulation system according to an embodiment of the present application. The soil environment electric leakage simulation system that this application embodiment provided includes: a positive electrode 100, a negative electrode 200, an equivalent resistor 300, and an insulating layer 400.
The positive electrode 100 is in the shape of a cylinder and is mounted on the top surface of the insulating layer 400, the bottom surface of the positive electrode 100 is in contact with the top surface of the insulating layer 400, and the radius of the bottom surface of the positive electrode 100 is determined according to the potential of any one position in the area to be simulated, the potential of the central position in the area to be simulated, the distance between the position and the central position in the area to be simulated, and the outer circle radius of the bottom surface of the equivalent resistor 300.
The equivalent resistor 300 is shaped as a hollow cylinder and is mounted on the top surface of the insulating layer 400, the height of the equivalent resistor 300 is previously set, and the outer circumferential radius of the bottom surface of the equivalent resistor 300 is previously set.
The positive electrode 100 is located in the hollow area of the equivalent resistor 300, and the outer side of the positive electrode 100 is in contact with the inner side of the equivalent resistor 300, and the height of the positive electrode 100 is greater than or equal to the height of the equivalent resistor 300.
The negative electrode 200 is a layer of conductive material wrapped on the outer side surface of the equivalent resistor 300, the length of the negative electrode 200 is determined according to the outer circumference of the bottom surface of the equivalent resistor 300, and the height of the negative electrode 200 is the same as that of the equivalent resistor 300.
Wherein:
and a positive electrode 100 for simulating a potential at a central position in the area to be simulated, and for connecting to a positive electrode of a preset external power supply.
And the negative electrode 200 is used for simulating zero potential in the area to be simulated and is connected with the negative electrode of a preset external power supply.
An equivalent resistor 300 for simulating the resistance between the potential of the center position and the zero potential.
The soil environment electric leakage simulation system that this application embodiment provided simulates real soil environment's equivalent resistance through the equivalent resistor, simulates real soil environment's electric leakage condition through positive electrode and negative electrode, and entire system structure is simpler, and it is more convenient to use, and the while because of adopting in the entire system is solid material, does not contain liquid material, and the security is higher during consequently the use.
Specifically, the shape of the positive electrode 100 is a cylinder, and a metal or other electrode material may be selected, the positive electrode 100 is mounted on the top surface of the insulating layer 400, the bottom surface of the positive electrode 100 contacts with the top surface of the insulating layer 400, and the positive electrode 100 may be placed only on the top surface of the insulating layer 400, or may be fixed on the top surface of the insulating layer 400, which is not limited in particular. The radius of the bottom surface of the positive electrode 100 is determined according to the potential of any one position in the area to be simulated, the potential of the central position in the area to be simulated, the distance from the position to the central position in the area to be simulated, and the outer radius of the bottom surface of the equivalent resistor 300. The potential of any position in the area to be simulated is determined by the following steps:
acquiring soil information of an initial electric leakage soil environment, wherein the soil information comprises soil area, soil layer number, soil thickness and soil moisture content;
determining the equivalent soil resistivity of the area to be simulated according to the soil area, the soil layer number, the soil thickness and the soil water content;
determining a region to be simulated by taking the central position of the earth surface of the initial electric leakage soil environment as the center of a circle and the outer circle radius of the bottom surface of the equivalent resistor 300 as the radius;
and determining the potential of any position in the area to be simulated according to the potential of the central position in the area to be simulated, the equivalent soil resistivity, the distance between the position and the central position and the outer circle radius of the bottom surface of the equivalent resistor 300.
Specifically, the soil information of the initial leaky soil environment can be acquired through field measurement or historical data statistics, and the soil information includes soil area, soil layer number, soil thickness, soil moisture content and the like. According to the obtained soil information, the equivalent soil resistivity of the area to be simulated can be determined. In one example, the equivalent soil resistivity of the region to be simulated can be determined by simulation with the CEDGS software according to the soil area, the soil layer number, the soil thickness and the soil water content. In other possible examples, the person skilled in the art may determine the equivalent soil resistivity of the area to be simulated empirically and practically, such as by means of field measurements, without being limited in particular.
After the equivalent soil resistivity is determined, the area to be simulated is determined by taking the center position of the earth surface of the initial leakage soil environment as the center of a circle and the outer circle radius of the bottom surface of the equivalent resistor 300 as the radius. The area to be simulated is an equivalent circular area intercepted from the earth surface of the initial electric leakage soil environment, and the circle center position is the position of the electric leakage center of the initial electric leakage soil environment. The determination of the area to be simulated may be performed in an initial leaky soil environment, or may be performed by simulation on an electronic device such as a computer, and is not particularly limited.
And determining the potential of any position in the area to be simulated according to the potential of the central position in the area to be simulated, the equivalent soil resistivity, the distance between the position and the central position and the outer circle radius of the bottom surface of the equivalent resistor 300. In one example, for any position in the area to be simulated, the potential of the position can be determined by simulation of CEDGS software according to the potential of the central position in the area to be simulated, the equivalent soil resistivity, the distance between the position and the central position and the outer circle radius of the bottom surface of the equivalent resistor 300. Fig. 3 illustrates the simulation of the potential distribution at each position in the region to be simulated at different leakage current levels using the CEDGS software. In other possible examples, the person skilled in the art may determine the potential at any position in the region to be simulated based on experience and practical situations, such as by means of actual measurement, without limitation.
After the potential of any position in the area to be simulated is determined, the potential of the central position in the area to be simulated, the distance between the position and the central position in the area to be simulated and the outer circle radius of the bottom surface of the equivalent resistor 300 are combined to determine the radius of the bottom surface of the positive electrode 100. The bottom surface radius of the positive electrode can be determined by equation (1):
in the formula (1), r1 is the radius of the bottom surface of the positive electrode 100, d is the distance between any position in the region to be simulated and the center position, U is the potential of the center position in the region to be simulated, L is the outer radius of the bottom surface of the equivalent resistor 300, and U (d) is the potential of any position in the region to be simulated.
The equivalent resistor 300 is shaped as a hollow cylinder and is mounted on the top surface of the insulating layer 400, the height of the equivalent resistor 300 is previously set, and the outer circumferential radius of the bottom surface of the equivalent resistor 300 is previously set. The height of the equivalent resistor 300 is the height of the soil environment leakage simulation system provided by the embodiment of the application, and is used for simulating the thickness of soil, and the outer circle radius of the bottom surface of the equivalent resistor 300 is the radius of the soil environment leakage simulation system provided by the embodiment of the application, and is used for simulating the range of a leakage environment.
The positive electrode 100 is located in the hollow area of the equivalent resistor 300, and the outer side of the positive electrode 100 is in contact with the inner side of the equivalent resistor 300, and the height of the positive electrode 100 is greater than or equal to the height of the equivalent resistor 300. The inner circle radius of the bottom surface of the equivalent resistor 300 should be slightly larger than the radius of the bottom surface of the positive electrode 100, so that the equivalent resistor 300 can be completely sleeved on the positive electrode 100, and since the inner circle radius of the bottom surface of the equivalent resistor 300 is slightly different from the radius of the bottom surface of the positive electrode 100, the two radii can be regarded as the same value in the calculation or analysis process, i.e. the inner circle radius of the bottom surface of the equivalent resistor 300 can be approximately equal to the radius of the bottom surface of the positive electrode 100.
The resistivity of the equivalent resistor 300 is fixed and constant, and according to the equivalent soil resistivity of the environment to be simulated, the height of the equivalent resistor 300 and the radial unit distance, the resistivity of the equivalent resistor 300, namely the resistance value of the unit volume, can be determined, and in the theory of integration, it can also be called as a resistance infinitesimal. Since the height of the equivalent resistor 300 is preset, the resistance value of a certain position of the top surface of the equivalent resistor 300 varies according to the radial distance of the certain position from the center point of the positive electrode. The equivalent resistor 300 can be regarded as being formed by connecting a plurality of resistors with gradually changing resistance values in series, and the resistance value of one resistor can be obtained by integrating the resistance infinitesimal of the equivalent resistor 300 in the length range. Fig. 4 schematically shows a simplified equivalent circuit of the soil environment leakage simulation system provided by the embodiment of the application. The resistance infinitesimal in the equivalent resistor 300 can be determined by equation (2):
in formula (2), dR is a resistance infinitesimal, which represents the resistance value of a single-bit resistor in the equivalent resistor 300; ρ is the equivalent soil resistivity, l is the distance from the center point of the positive electrode 100 to a certain position of the top surface of the equivalent resistor 300, D is the height of the equivalent resistor 300, and dl is the unit distance from the center point of the positive electrode 100.
As shown in fig. 2b, the resistance of the simulated soil from L1 to L2 from the center of the positive electrode 100 can be obtained by integrating the resistance infinitesimal over L1 to L2, and the resistance of the part of the simulated soil can be specifically determined by formula (3):
in the formula (3), RL1L2dR is the resistance from L1 to L2 from the center of the positive electrode 100, and represents the resistance value of a single-volume resistor in the equivalent resistor 300; ρ is the equivalent soil resistivity and D is the height of the equivalent resistor 300.
Thus, the equivalent resistor 300 corresponds to a simulated soil from the bottom surface radius r1 of the positive electrode to the bottom surface outer circle radius L of the equivalent resistor 300 from the center of the positive electrode 100. The total resistance of the equivalent resistor 300 may be determined by:
the total resistance of the equivalent resistor 300 is determined according to the equivalent soil resistivity, the height of the equivalent resistor 300, the outer radius of the bottom surface of the equivalent resistor 300, and the radius of the bottom surface of the positive electrode 100. Specifically, the total resistance of the equivalent resistor 300 can be determined by equation (4):
in the formula (4), RtotalTo the total resistance of the equivalent resistor 300, dR is the resistance infinitesimal of the equivalent resistor 300, i.e., the resistivity of the equivalent resistor 300 per unit volume, ρ is the equivalent soil resistivity, D is the height of the equivalent resistor 300, L is the outer radius of the bottom surface of the equivalent resistor 300, and r1 is the radius of the bottom surface of the positive electrode 100.
When the equivalent resistor 300 provided in the embodiment of the present application is actually selected, a whole ring resistor that meets the resistance distribution and the total resistance value of the equivalent resistor 300 may be used, or a plurality of ring resistors may be selected according to experience and practical situations to be contacted with each other and connected in series to form the equivalent resistor 300, which is not limited in particular. It should be noted that, if a plurality of annular resistors are connected in series, the resistivity of each resistor should be consistent with the resistivity of the equivalent resistor 300, and the resistance value of each resistor can be determined by integrating the corresponding length according to the inner circle radius of the annular bottom surface and the outer circle radius of the annular bottom surface, that is, the length range from the center of the positive electrode 100 by using the formula (3).
For the equivalent resistor 300, since the resistance value corresponding to each position of the top surface varies according to the distance of the position from the center of the positive electrode 100, the potential corresponding to each position of the top surface of the equivalent resistor 300 also varies according to the distance of the position from the center of the positive electrode 100. Specifically, the potential u (l) of the position of the equivalent resistor 300, where the distance from the top surface to the center of the positive electrode 100 is l, can be determined by equation (5):
in the formula (5), U (l) is the potential of the position of the equivalent resistor 300 where the distance between the top surface and the center of the positive electrode 100 is l, U is the potential of the center of the positive electrode 100, and R istotalρ is the equivalent soil resistivity, D is the height of the equivalent resistor 300, l is the distance from the center of the positive electrode 100 to a position on the top surface of the equivalent resistor 300, and r1 is the radius of the bottom surface of the positive electrode 100, which is the total resistance of the equivalent resistor 300.
The equivalent resistor that this application embodiment provided can simulate the equivalent resistance of real electric leakage soil environment to can simulate from electric leakage central point to the approximate potential distribution condition of transmission all around, it is convenient to build, and the flexibility is higher, easily adjusts according to the soil parameter of difference, all adopts solid material simultaneously, does not contain liquid material, and the security is higher during consequently the use.
The negative electrode 200 is a layer of conductive material wrapped on the outer side surface of the equivalent resistor 300, the length of the negative electrode 200 is determined according to the outer circumference of the bottom surface of the equivalent resistor 300, and the height of the negative electrode 200 is the same as that of the equivalent resistor 300. The negative electrode 200 is completely wrapped on the outer side surface of the equivalent resistor 300, so that the negative electrode 200 is a rectangular parallelepiped with a certain thickness and a smaller thickness after being unfolded, the length of the rectangular parallelepiped is the outer circumference of the bottom surface of the equivalent resistor 300, and the height of the rectangular parallelepiped is the same as the height of the equivalent resistor 300.
The soil environment electric leakage simulation system that this application embodiment provided, positive electrode 100 is located the positive center, and equivalent resistor 300 covers at the lateral surface of positive electrode 100, and negative electrode 200 wraps up at equivalent resistor 300's lateral surface, and the three bottom surfaces align, installs on the top surface of insulating layer 400 in unison, and insulating layer 400 can be the cylinder, also can be cuboid or square, and the shape is specifically not injectd. In the whole system, the positive electrode 100 is used for simulating the potential of the central position in the area to be simulated and is connected with the positive electrode of a preset external power supply; the negative electrode 200 is used for simulating zero potential in a region to be simulated and is connected with the negative electrode of a preset external power supply; an equivalent resistor 300 for simulating the resistance between the potential of the center position and the zero potential. In the whole system, the positive electrode 100 is connected to the positive electrode of the external power source, and the negative electrode 200 is connected to the negative electrode of the external power source, so that a voltage is applied to the whole system, and the top surface of the equivalent resistor 300 generates a corresponding potential according to the resistance. For a given equivalent soil resistivity, a simulated soil thickness (i.e. the height of the equivalent resistor 300) and a model size (i.e. the radius of the outer circle of the bottom surface of the equivalent resistor 300, for example, L ═ 2m), the potential distribution of the leakage area of the actual soil environment can be simulated by changing the magnitude of the voltage applied between the electrodes and the radius r1 of the bottom surface of the positive electrode 100. That is, when the magnitude of the voltage applied between the two electrodes is changed or the radius r1 of the bottom surface of the positive electrode 100 is changed, the potential distribution of the top surface of the equivalent resistor 300 is also changed differently. Fig. 5 is a schematic diagram illustrating potential distribution of the equivalent resistor surface at different voltages in the soil environment leakage simulation system provided by the embodiment of the application; fig. 6 exemplarily shows a potential distribution diagram of an equivalent resistor surface under different positive electrode radii of a soil environment leakage simulation system provided by an embodiment of the application.
The soil environment electric leakage simulation system that this application embodiment provided simulates real soil environment's equivalent resistance through the equivalent resistor, simulates real soil environment's electric leakage condition through positive electrode and negative electrode, and entire system structure is simpler, and it is more convenient to use, and the system adjustment is got up also very conveniently when simulating the soil of different parameters, and the while is solid material because of adopting in the entire system, does not contain liquid material, is difficult to the electric leakage, and the security is higher during consequently the use.
The following is an embodiment of the method, which can be applied to an embodiment of a soil environment electric leakage simulation system of the present application. For details not disclosed in the embodiments of the method of the present application, please refer to the embodiments of the soil environment leakage simulation system of the present application.
The embodiment of the application provides a soil environment electric leakage simulation method, which is applied to a soil environment electric leakage simulation system, and the soil environment electric leakage simulation system comprises: positive electrode, negative electrode, equivalent resistor and insulating layer.
The positive electrode is in a cylinder shape and is arranged on the top surface of the insulating layer, the bottom surface of the positive electrode is in contact with the top surface of the insulating layer, and the radius of the bottom surface of the positive electrode is determined according to the potential of any position in the area to be simulated, the potential of the central position in the area to be simulated, the distance between the position and the central position in the area to be simulated and the excircle radius of the bottom surface of the equivalent resistor.
The shape of the equivalent resistor is a hollow cylinder and is arranged on the top surface of the insulating layer, the height of the equivalent resistor is preset, and the excircle radius of the bottom surface of the equivalent resistor is preset.
The positive electrode is positioned in the hollow area of the equivalent resistor, the outer side face of the positive electrode is in contact with the inner side face of the equivalent resistor, and the height of the positive electrode is larger than or equal to that of the equivalent resistor.
The negative electrode is a layer of conductive material wrapped on the outer side surface of the equivalent resistor, the length of the negative electrode is determined according to the outer circumference of the bottom surface of the equivalent resistor, and the height of the negative electrode is the same as that of the equivalent resistor.
The method specifically comprises the following steps:
the positive electrode simulates the potential of the central position in the area to be simulated and is connected with the positive electrode of a preset external power supply.
The negative electrode simulates zero potential in the region to be simulated and is connected with the negative electrode of a preset external power supply.
The equivalent resistor models the resistance between the potential of the center position and zero potential.
In one implementation, the potential at any one position in the area to be simulated is determined by:
and acquiring soil information of the initial electric leakage soil environment, wherein the soil information comprises soil area, soil layer number, soil thickness and soil moisture content.
And determining the equivalent soil resistivity of the area to be simulated according to the soil area, the soil layer number, the soil thickness and the soil water content.
And determining the area to be simulated by taking the central position of the earth surface of the initial electric leakage soil environment as the center of a circle and the outer circle radius of the bottom surface of the equivalent resistor as the radius.
And determining the potential of any position in the region to be simulated according to the potential of the central position in the region to be simulated, the equivalent soil resistivity, the distance between the position and the central position and the outer circle radius of the bottom surface of the equivalent resistor.
In one implementation, determining the equivalent soil resistivity of the region to be simulated according to the soil area, the number of soil layers, the soil thickness and the soil water content includes:
and (3) according to the soil area, the soil layer number, the soil thickness and the soil water content, utilizing CEDGS software to simulate simulation, and determining the equivalent soil resistivity of the area to be simulated.
In one implementation manner, for any one position in the region to be simulated, determining the potential of the position according to the potential of the central position in the region to be simulated, the equivalent soil resistivity, the distance between the position and the central position and the outer circle radius of the bottom surface of the equivalent resistor, includes:
and aiming at any position in the region to be simulated, according to the potential of the central position in the region to be simulated, the equivalent soil resistivity, the distance between the position and the central position and the outer circle radius of the bottom surface of the equivalent resistor, utilizing CEDGS software to simulate, and determining the potential of the position.
In one implementation, the radius of the bottom surface of the positive electrode is determined by the following equation:
wherein r1 is the radius of the bottom surface of the positive electrode, d is the distance between any position in the region to be simulated and the center position, U is the potential of the center position in the region to be simulated, L is the radius of the outer circle of the bottom surface of the equivalent resistor, and U (d) is the potential of any position in the region to be simulated.
In one implementation, the total resistance of the equivalent resistor is determined by:
and determining the total resistance of the equivalent resistor according to the equivalent soil resistivity, the height of the equivalent resistor, the outer circle radius of the bottom surface of the equivalent resistor and the radius of the bottom surface of the positive electrode.
In one implementation, the total resistance of the equivalent resistor is determined by the following equation:
wherein R istotaldR is the resistance infinitesimal of the equivalent resistor, i.e. the resistivity of the equivalent resistor per unit volume; ρ is the equivalent soil resistivity, D is the height of the equivalent resistor, L is the bottom surface outer circle radius of the equivalent resistor, and r1 is the bottom surface radius of the positive electrode.
Therefore, the soil environment electric leakage simulation method provided by the embodiment of the application is applied to a soil environment electric leakage simulation system, the equivalent resistance of a real soil environment is simulated through the equivalent resistor, the electric leakage condition of the real soil environment is simulated through the positive electrode and the negative electrode, the whole system is simple in structure and convenient to use, solid materials are adopted in the whole system, liquid materials are not contained, electric leakage is not easy to occur, and therefore the soil environment electric leakage simulation method is high in safety during use and high in practicability.
Those skilled in the art will clearly understand that the techniques in the embodiments of the present application may be implemented by way of software plus a required general hardware platform. Based on such understanding, the technical solutions in the embodiments of the present application may be essentially implemented or a part contributing to the prior art may be embodied in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the embodiments or some parts of the embodiments of the present application.
The same and similar parts in the various embodiments in this specification may be referred to each other. In particular, for the embodiments of the service construction apparatus and the service loading apparatus, since they are substantially similar to the embodiments of the method, the description is simple, and the relevant points can be referred to the description in the embodiments of the method.
The above-described embodiments of the present application do not limit the scope of the present application.
Claims (10)
1. A soil environment electrical leakage simulation system, the system comprising: a positive electrode, a negative electrode, an equivalent resistor, and an insulating layer;
the positive electrode is in a cylinder shape and is arranged on the top surface of the insulating layer, the bottom surface of the positive electrode is in contact with the top surface of the insulating layer, and the radius of the bottom surface of the positive electrode is determined according to the potential of any position in the region to be simulated, the potential of the central position in the region to be simulated, the distance between the position and the central position in the region to be simulated and the excircle radius of the bottom surface of the equivalent resistor;
the equivalent resistor is in the shape of a hollow cylinder and is arranged on the top surface of the insulating layer, the height of the equivalent resistor is preset, and the excircle radius of the bottom surface of the equivalent resistor is preset;
the positive electrode is positioned in the hollow area of the equivalent resistor, the outer side face of the positive electrode is in contact with the inner side face of the equivalent resistor, and the height of the positive electrode is greater than or equal to that of the equivalent resistor;
the negative electrode is a layer of conductive material wrapped on the outer side surface of the equivalent resistor, the length of the negative electrode is determined according to the outer circumference of the bottom surface of the equivalent resistor, and the height of the negative electrode is the same as that of the equivalent resistor;
wherein:
the positive electrode is used for simulating the potential of the central position in the area to be simulated and is connected with the positive electrode of a preset external power supply;
the negative electrode is used for simulating zero potential in the region to be simulated and is connected with the negative electrode of the preset external power supply;
the equivalent resistor is used for simulating the resistance between the potential of the central position and the zero potential.
2. The system of claim 1, wherein the potential at any one location in the area to be simulated is determined by:
acquiring soil information of an initial electric leakage soil environment, wherein the soil information comprises soil area, soil layer number, soil thickness and soil moisture content;
determining the equivalent soil resistivity of the area to be simulated according to the soil area, the soil layer number, the soil thickness and the soil water content;
determining an area to be simulated by taking the central position of the earth surface of the initial electric leakage soil environment as a circle center and the outer circle radius of the bottom surface of the equivalent resistor as a radius;
and aiming at any position in the region to be simulated, determining the potential of the position according to the potential of the central position in the region to be simulated, the equivalent soil resistivity, the distance between the position and the central position and the excircle radius of the bottom surface of the equivalent resistor.
3. The system of claim 2, wherein determining an equivalent soil resistivity for the area to be simulated from the soil area, the number of soil layers, the soil thickness, and the soil moisture content comprises:
and determining the equivalent soil resistivity of the area to be simulated by utilizing CEDGS software simulation according to the soil area, the soil layer number, the soil thickness and the soil water content.
4. The system of claim 2, wherein the determining, for any one position in the area to be simulated, the potential of the position according to the potential of the central position in the area to be simulated, the equivalent soil resistivity, the distance between the position and the central position, and the outer circle radius of the bottom surface of the equivalent resistor comprises:
and aiming at any position in the region to be simulated, according to the potential of the central position in the region to be simulated, the equivalent soil resistivity, the distance between the position and the central position and the excircle radius of the bottom surface of the equivalent resistor, determining the potential of the position by utilizing CEDGS software simulation.
5. The system of claim 1, wherein the radius of the bottom surface of the positive electrode is determined by the formula:
wherein r1 is the radius of the bottom surface of the positive electrode, d is the distance between any position in the region to be simulated and the central position, U is the potential of the central position in the region to be simulated, L is the outer radius of the bottom surface of the equivalent resistor, and U (d) is the potential of any position in the region to be simulated.
6. The system of claim 1, wherein the total resistance of the equivalent resistors is determined by:
determining the total resistance of the equivalent resistor according to the equivalent soil resistivity, the height of the equivalent resistor, the bottom surface excircle radius of the equivalent resistor and the bottom surface radius of the positive electrode.
7. The system of claim 6, wherein the total resistance of the equivalent resistor is determined by the following equation:
wherein R istotaldR is the resistance infinitesimal of the equivalent resistor, namely the resistivity of the equivalent resistor per unit volume; ρ is the equivalent soil resistivity, D is the height of the equivalent resistor, L is the bottom surface outer circle radius of the equivalent resistor, and r1 is the bottom surface radius of the positive electrode.
8. A soil environment electric leakage simulation method is applied to a soil environment electric leakage simulation system, and the system comprises: a positive electrode, a negative electrode, an equivalent resistor, and an insulating layer;
the positive electrode is in a cylinder shape and is arranged on the top surface of the insulating layer, the bottom surface of the positive electrode is in contact with the top surface of the insulating layer, and the radius of the bottom surface of the positive electrode is determined according to the potential of any position in the region to be simulated, the potential of the central position in the region to be simulated, the distance between the position and the central position in the region to be simulated and the excircle radius of the bottom surface of the equivalent resistor;
the equivalent resistor is in the shape of a hollow cylinder and is arranged on the top surface of the insulating layer, the height of the equivalent resistor is preset, and the excircle radius of the bottom surface of the equivalent resistor is preset;
the positive electrode is positioned in the hollow area of the equivalent resistor, the outer side face of the positive electrode is in contact with the inner side face of the equivalent resistor, and the height of the positive electrode is greater than or equal to that of the equivalent resistor;
the negative electrode is a layer of conductive material wrapped on the outer side surface of the equivalent resistor, the length of the negative electrode is determined according to the outer circumference of the bottom surface of the equivalent resistor, and the height of the negative electrode is the same as that of the equivalent resistor;
the method comprises the following steps:
the positive electrode simulates the potential of the central position in the area to be simulated and is connected with the positive electrode of a preset external power supply;
the negative electrode simulates a zero potential in the region to be simulated and is connected with the negative electrode of the preset external power supply;
the equivalent resistor simulates a resistance between the potential of the center position and the zero potential.
9. The method of claim 8, wherein the potential at any one location in the area to be simulated is determined by:
acquiring soil information of an initial electric leakage soil environment, wherein the soil information comprises soil area, soil layer number, soil thickness and soil moisture content;
determining the equivalent soil resistivity of the area to be simulated according to the soil area, the soil layer number, the soil thickness and the soil water content;
determining an area to be simulated by taking the central position of the earth surface of the initial electric leakage soil environment as a circle center and the outer circle radius of the bottom surface of the equivalent resistor as a radius;
and aiming at any position in the region to be simulated, determining the potential of the position according to the potential of the central position in the region to be simulated, the equivalent soil resistivity, the distance between the position and the central position and the excircle radius of the bottom surface of the equivalent resistor.
10. The method of claim 9, wherein determining an equivalent soil resistivity for the area to be simulated from the soil area, the number of soil layers, the soil thickness, and the soil moisture content comprises:
and determining the equivalent soil resistivity of the area to be simulated by utilizing CEDGS software simulation according to the soil area, the soil layer number, the soil thickness and the soil water content.
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