CN112540258B - Grounding grid mechanical breakpoint monitoring device and method - Google Patents

Grounding grid mechanical breakpoint monitoring device and method Download PDF

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Publication number
CN112540258B
CN112540258B CN202011183496.2A CN202011183496A CN112540258B CN 112540258 B CN112540258 B CN 112540258B CN 202011183496 A CN202011183496 A CN 202011183496A CN 112540258 B CN112540258 B CN 112540258B
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main body
cylindrical cavity
tension
monitoring unit
grounding
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CN112540258A (en
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严玉婷
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Shenzhen Power Supply Bureau Co Ltd
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Shenzhen Power Supply Bureau Co Ltd
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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
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
    • 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
    • G01R31/54—Testing for continuity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52—Outage or fault management, e.g. fault detection or location

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  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

The invention relates to a device and a method for monitoring mechanical breakpoints of a grounding grid, wherein the device comprises a tension monitoring unit, the tension monitoring unit comprises a main body and a testing interface, the main body is of a hollow structure, and the testing interface is used for externally connecting testing equipment, so that the testing equipment is communicated with the hollow structure through the testing interface to test the air tightness of the main body; the breaking tension of the main body is consistent with the breaking tension of the grounding bus, so that whether the grounding bus has a break point can be judged according to the air tightness. Because the pulling-off tension of the main body of the tension monitoring unit is consistent with that of the grounding bus, when the pulling-off tension of the grounding bus due to sedimentation reaches the pulling-off tension of the grounding bus, the tension monitoring unit buried near the grounding bus can be pulled off, so that the main body is cracked, and whether the grounding bus has a break point can be judged by testing the air tightness of the main body.

Description

Grounding grid mechanical breakpoint monitoring device and method
Technical Field
The invention relates to the technical field of power systems, in particular to a device and a method for monitoring mechanical breakpoints of a grounding network.
Background
The performance of the grounding network is related to the safe and stable operation of the power grid, and severe accidents caused by the fact that the performance of the grounding network is poor or the performance parameters of the grounding network do not meet the operation requirements occur in China. In coastal areas in particular, various settlement deformations can be generated on the grounding grid laid on the soft foundation, and the grounding grid can be broken when the working force reaches a certain degree, so that the safety and stability of a power grid system are affected.
Disclosure of Invention
Based on this, it is necessary to provide a device and a method for monitoring mechanical break points of a grounding network.
The invention provides a mechanical breakpoint monitoring device of a grounding grid, which comprises a tension monitoring unit, wherein the tension monitoring unit comprises a main body and a testing interface, the main body is of a hollow structure, and the testing interface is used for externally connecting testing equipment, so that the testing equipment is communicated with the hollow structure through the testing interface to test the air tightness of the main body;
the tension monitoring unit is used for being close to the ground connection busbar of the ground network to be monitored and buries in soil, the test interface is exposed out of the soil after the tension monitoring unit is buried in the soil, and the breaking tension of the main body and the breaking tension of the ground connection busbar tend to be consistent, so that whether a breakpoint occurs to the ground connection busbar can be judged according to the air tightness.
In one embodiment, the tension monitoring unit further comprises a first sealing interface device, which is in sealing connection with the main body through the test interface.
In one embodiment, the first sealing interface device is a sealing cover, the main body is a hollow cylindrical structure, a first end of the hollow cylindrical structure is closed, and a second end of the hollow cylindrical structure is in sealing connection with the sealing cover.
In one embodiment, the main body is made of the same metal as the grounding bus.
In one embodiment, the body is provided with an anti-corrosion coating on the outside and/or the body is made of a corrosion-resistant material.
In one embodiment, the hollow cavity comprises a first cylindrical cavity and a second cylindrical cavity which are communicated with each other, the second cylindrical cavity is located at the second end, the first cylindrical cavity is located at one end, close to the first end, of the second cylindrical cavity, the first cylindrical cavity and the second cylindrical cavity are coaxially arranged, the diameter of the second cylindrical cavity is larger than that of the first cylindrical cavity, the sealing cover comprises a first cylindrical and a second cylindrical which are connected with each other, the diameter of the first cylindrical cavity is matched with that of the first cylindrical cavity, the diameter of the second cylindrical cavity is matched with that of the second cylindrical cavity, the first cylindrical cavity and the second cylindrical cavity are provided with internal threads, and the first cylindrical cavity and the second cylindrical cavity are provided with external threads.
In one embodiment, the grounding grid mechanical breakpoint monitoring device further comprises a testing unit, the testing unit comprises a pressurizing device, a barometer, a second sealing interface device and a gas channel, the second sealing interface device is provided with a through hole, the pressurizing device and the barometer are communicated with the through hole through the gas channel, the testing unit is used for being connected with the main body through the second sealing interface device during testing, so that the testing unit and the main body form a sealing structure, and the pressurizing device is used for pressurizing gas in the main body to judge the air tightness of the main body through the barometer.
In one embodiment, the pressurizing device is a booster pump for pressurizing the gas filled in the main body.
In addition, the invention also provides a method for monitoring the mechanical breakpoint of the grounding grid, which uses the device for monitoring the mechanical breakpoint of the grounding grid to monitor, and comprises the following steps:
burying a ground bus of the tension monitoring unit close to the ground network to be monitored into soil, wherein the test interface is exposed out of the soil;
and connecting the testing unit with the tension monitoring unit through a second sealing interface device, testing the air tightness of the main body, and judging that a breakpoint occurs to the grounding bus if the main body is leaked.
In one embodiment, the pressurizing device is a booster pump, the air tightness of the main body is tested, and if the main body leaks air, the step of determining that the breakpoint occurs in the grounding bus includes:
the main body is filled with gas through a booster pump for boosting;
and stopping charging gas into the main body through the booster pump, and judging that a breakpoint occurs to the grounding bus if the reading of the barometer is smaller than a first threshold value after the first time passes.
According to the grounding grid mechanical breakpoint monitoring device and the grounding grid mechanical breakpoint monitoring method, the breaking tension of the main body of the tension monitoring unit is consistent with the breaking tension of the grounding bus, and when the grounding bus is broken due to the fact that the breaking tension of the grounding bus is reached due to sedimentation, the tension monitoring unit buried near the grounding bus is broken, so that the main body is cracked, and therefore whether the grounding bus has a breakpoint can be judged through the air tightness of the main body. Because the test interface is exposed out of the soil, the stress condition of the grounding grid can be monitored in a excavation-free mode, physical damage to the grounding grid is avoided, the breakpoint of the grounding grid can be timely found and determined, meanwhile, the workload of basic-level testers is reduced, and the working efficiency is effectively improved.
Drawings
In order to more clearly illustrate the technical solutions of embodiments or conventional techniques of the present application, the drawings required for the descriptions of the embodiments or conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of a tension monitoring unit according to an embodiment;
FIG. 2 is a schematic diagram of a first seal interface and a tension monitoring unit according to an embodiment;
FIG. 3 is a schematic diagram of a seal tension monitoring unit according to an embodiment;
FIG. 4 is a schematic diagram of a test unit according to an embodiment;
FIG. 5 is a schematic diagram illustrating a structure of a breakpoint monitoring device of a grounding network according to an embodiment;
FIG. 6 is a flowchart of a method for monitoring a breakpoint of a ground network according to an embodiment;
FIG. 7 is a flowchart of a method for determining a break point of a ground bus according to an embodiment.
Description of element numbers:
tension monitoring unit: 100; a main body: 101; test interface: 102, a step of; a first seal interface: 200; a first cylinder: 202; a second cylinder: 201; a first cylindrical cavity: 204; a second cylindrical cavity: 203, a base station; first end: 205. And a second end: 206; test unit: 400; supercharging device: 401; barometer: 402; a second seal interface: 403; through hole: 404; a gas channel: 405
Detailed Description
In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Examples of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that the terms "first," "second," and the like, as used herein, may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the present application. Both the first resistor and the second resistor are resistors, but they are not the same resistor.
It is to be understood that in the following embodiments, "connected" is understood to mean "electrically connected", "communicatively connected", etc., if the connected circuits, modules, units, etc., have electrical or data transfer between them.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.
The performance of the grounding network is related to the safe and stable operation of the power grid, and severe accidents caused by the fact that the performance of the grounding network is poor or the performance parameters of the grounding network do not meet the operation requirements occur in China. In coastal areas in particular, various settlement deformations can be generated on the grounding grid laid on the soft foundation, and the grounding grid can be broken when the working force reaches a certain degree, so that the safety and stability of a power grid system are affected.
Based on the above, the invention provides a grounding grid mechanical breakpoint monitoring device, which comprises a tension monitoring unit, wherein the tension monitoring unit comprises a main body and a testing interface, the main body is of a hollow structure, and the testing interface is used for externally connecting testing equipment, so that the testing equipment is communicated with the hollow structure through the testing interface so as to test the air tightness of the main body.
The tension monitoring unit is used for being close to the ground connection busbar of the ground network to be monitored and buries in soil, the test interface is exposed out of the soil after the tension monitoring unit is buried in the soil, and the breaking tension of the main body and the breaking tension of the ground connection busbar tend to be consistent, so that whether a breakpoint occurs to the ground connection busbar can be judged according to the air tightness.
According to the grounding grid mechanical breakpoint monitoring device, the breaking tension of the main body of the tension monitoring unit is consistent with the breaking tension of the grounding bus, and when the grounding bus is broken due to the fact that the breaking tension of the grounding bus is reached by the pulling tension caused by sedimentation, the tension monitoring unit buried near the grounding bus is broken too, so that cracks are generated in the main body, and therefore whether the grounding bus has a breakpoint can be judged through the air tightness of the main body. Because the test interface is exposed out of the soil, the stress condition of the grounding grid can be monitored in an excavation-free mode, physical damage to the grounding grid is avoided, the breakpoint of the grounding grid can be timely found and determined, and then manpower, material resources and cost are saved.
Fig. 1 is a schematic structural diagram of a tension monitoring unit 100, wherein the tension monitoring unit 100 includes a main body 101 and a test interface 102. The main body 101 is of a hollow structure, and the test interface 102 is used for externally connecting test equipment, so that the test equipment is communicated with the hollow structure through the test interface 102, and the air tightness of the main body 101 is tested.
The tension monitoring unit 100 is used for burying a grounding bus close to a grounding network to be monitored in soil, the test interface 102 is exposed out of the soil after the tension monitoring unit 100 is buried in the soil, and the breaking tension of the main body 101 and the breaking tension of the grounding bus tend to be consistent.
In alternative embodiments, the shape of the tension monitoring unit 100 may be circular, square, triangular, etc., which is not limited herein.
In one embodiment, the main body 101 is made of the same metal as the grounding bus bar, and the tensile force of the main body 101 and the grounding bus bar is the same.
In one embodiment, the body 101 is provided with an anti-corrosion coating on the exterior and/or the body 101 is made of a corrosion resistant material (e.g., copper).
Due to the reasons of subsidence of the land and the like, the ground network grounding bus buried in the soil is pulled by external force to break, and the safe and stable operation of the power grid is affected. According to the method, the tension monitoring unit 100 is embedded into the soil near the grounding bus of the grounding network to be monitored, the test interface 102 is exposed out of the soil after the tension monitoring unit 100 is embedded into the soil, and the breaking tension of the main body 101 and the breaking tension of the grounding bus tend to be consistent. Specifically, the ground bus of the tension monitoring unit 100 and the ground network are close to each other and buried in the soil, wherein the test interface 102 is above the soil, so that the installation of subsequent test equipment is facilitated, when the ground bus is pulled by external force to break, the tension of the tension monitoring unit 100 and the ground bus tend to be consistent, so that the tension monitoring unit 100 is broken, the tension monitoring unit is connected with the test interface 102 through the test equipment and is communicated with the hollow structure of the main body 101, whether the air tightness of the tension monitoring unit 100 is good or not is verified, the breakpoint condition of the tension monitoring unit 100 can be known, the breakpoint condition of the ground bus buried in the ground is indirectly confirmed, the ground network does not need to be excavated, and physical damage of the ground network is avoided.
In order to ensure that the breakpoint monitoring device for the grounding network has good sealing performance in non-test, the damage to the inside of the breakpoint monitoring device caused by the inhalation of outside moisture is avoided, and the test result is influenced, so that the main body 101 can be sealed. Fig. 2 is a schematic structural diagram of a first seal interface device 200 and a tension monitoring unit 100 in an embodiment, where the first seal interface device 200 is a seal cover in one embodiment, and the first seal interface device is connected with a main body 101 in a sealing manner through the test interface 102.
In one embodiment, the first sealing means is provided with an anti-corrosion coating on the outside and/or the material of the first sealing means is a corrosion resistant material, such as copper.
In an alternative embodiment, the body 101 is a hollow cylindrical structure with a first end 205 closed and a second end 206 sealingly connected to a sealing cap.
Specifically, if moisture is sucked into the hollow structure of the main body 101, corrosion and the like in the hollow structure may affect the subsequent test effect, so that it is necessary to ensure that the sealing performance of the tension monitoring unit 100 is good when not tested. Therefore, the invention adopts a double-layer spiral structure at the joint of the main body 101 and the first sealing device, the hollow cavity of the main body 101 comprises a first cylindrical cavity 204 and a second cylindrical cavity 203 which are mutually communicated, the second cylindrical cavity 203 is positioned at the second end 206, the first cylindrical cavity 204 is positioned at one end of the second cylindrical cavity 203 close to the first end 205, the first cylindrical cavity 204 and the second cylindrical cavity 203 are coaxially arranged, the diameter of the second cylindrical cavity 203 is larger than that of the first cylindrical cavity 204, the sealing cover comprises a first cylindrical 202 and a second cylindrical 201 which are mutually connected, the diameter of the first cylindrical 202 is matched with that of the first cylindrical cavity 204, the diameter of the second cylindrical 201 is matched with that of the second cylindrical cavity 203, the first cylindrical cavity 204 and the second cylindrical cavity 203 are provided with internal threads, and the first cylindrical 202 and the second cylindrical 201 are provided with external threads.
Fig. 3 shows a sealed tension monitoring unit 100 according to an embodiment. The first sealing device is connected to the tension monitoring unit 100 via a test interface 102. In an alternative embodiment, a sealing ring is also provided at the location where the first cylinder 202 and the first cylinder chamber 204 are connected, and likewise, a sealing ring is also provided at the location where the second cylinder 201 and the second cylinder chamber 203 are connected. And the tension monitoring unit 100 is used for being buried in the soil near the grounding bus of the grounding network to be monitored, the test interface 102 is exposed out of the soil after the tension monitoring unit 100 is buried in the soil, and the breaking tension of the main body 101 and the breaking tension of the grounding bus tend to be consistent. When the ground net breakpoint monitoring device is not tested, the ground net breakpoint monitoring device needs to be sealed to prevent external moisture invasion from corroding the internal structure of the ground net breakpoint monitoring device, or the tension monitoring unit 100 receives physical damage to cause non-ideal effect in the subsequent test, so that the ground net breakpoint monitoring device needs to be sealed. By the arrangement of the double-layer spiral structure and the double sealing rings, the tightness of the tension monitoring unit 100 is further ensured in the non-test, the invasion of moisture is prevented, the tension monitoring unit 100 is protected, and the durability of the tension monitoring unit is improved.
In judging whether the monitoring ground bus has a break point, the test device may be connected to the main body 101 of the tension monitoring unit 100 through the test interface 102 by judging the air tightness of the tension monitoring unit 100. In one embodiment, the test unit 400 is used to communicate with the main body 101 of the tension monitoring unit 100 through the test interface 102, so as to determine the air tightness of the tension monitoring unit 100.
As shown in fig. 4, the test unit 400 includes a pressurizing device 401, a barometer 402, a second sealing interface device 403, and a gas channel 405, where the second sealing interface device 403 is provided with a through hole 404, the pressurizing device 401 and the barometer 402 are communicated with the through hole 404 through the gas channel 405, and the test unit 400 is used to connect with the main body 101 through the second sealing interface device 403 during testing, so that the test unit 400 and the main body 101 form a sealing structure, and the pressurizing device 401 pressurizes the gas in the main body 101 to determine the air tightness of the main body 101 through the barometer 402.
In one embodiment, the second sealing interface device 403 has a through hole 404, and other structures are the same as those of the first sealing interface device 200, and a double-layer spiral structure is adopted, so that the tightness of the second sealing interface device is ensured.
Specifically, the present invention also adopts a double-screw sealing structure at the interface between the main body 101 of the tension monitoring unit 100 and the second sealing interface device 403, where the second sealing device includes a first cylinder 202 and a second cylinder 201 that are connected to each other, the diameter of the first cylinder 202 is matched with the diameter of the first cylinder cavity 204, the diameter of the second cylinder 201 is matched with the diameter of the second cylinder cavity 203, and the first cylinder 202 and the second cylinder 201 are provided with external threads.
In one embodiment, the second sealing device is provided with an anti-corrosion coating on the outside, and/or the material of the second sealing device is a corrosion-resistant material.
In one embodiment, the connection between the pressurizing device 401 and the gas channel 405 may also adopt a double-layer spiral structure and a double sealing ring for sealing connection, so as to prevent the gas leakage of the channel and influence the test effect.
In one embodiment, the pressurizing device 401 is a booster pump, and is used for pressurizing the gas filled in the main body 101.
In one embodiment, the barometer 402 needs to be installed only during testing, so as to avoid resource waste, and on the other hand, the barometer 402 cannot be in a high-pressure state for a long time, which affects the accuracy and risks air leakage. Therefore, in the present embodiment, the barometer 402 needs to be installed during the test, so as to improve the utilization rate of the barometer 402. In other embodiments, the barometer 402 may also be fixedly mounted with the test unit 400, without limitation.
In other embodiments, the barometer 402 may be a mini-type tire pressure gauge, a double-ended tire pressure gauge, a pen-type tire pressure gauge, a dial-type tire pressure gauge, a digital pressure gauge, a double-ended tire pressure gauge, etc., and the type of the barometer 402 is not limited in the present invention.
In addition, the test unit 400 of the present embodiment may perform breakpoint test on the plurality of tension monitoring units 100, which may save costs.
Fig. 5 is a schematic structural diagram of a breakpoint apparatus of the test tension monitoring unit 100 according to an embodiment of the invention. The test unit 400 is connected to the tension monitoring unit 100 through the test interface 102, and the pressurizing device 401 is communicated with the hollow structure in the tension monitoring unit 100 through the gas channel 405 and the through hole 404 of the second sealing device.
In one embodiment, the second sealing interface device 403 and the test interface 102 ensure good sealing performance of the structure through double spiral sealing, and prevent gas leakage from affecting the test effect.
In one embodiment, the pressurizing device 401 charges the hollow structure of the tension monitoring unit 100 with gas so that the air pressure in the hollow structure is increased, and then the air pressure in the hollow structure is measured by the air pressure gauge 402.
The tension monitoring unit 100 is used for burying a grounding bus close to a grounding network to be monitored in soil, the test interface 102 is exposed out of the soil after the tension monitoring unit 100 is buried in the soil, and the breaking tension of the main body 101 and the breaking tension of the grounding bus tend to be consistent.
In alternative embodiments, the shape of the tension monitoring unit 100 may be circular, square, triangular, etc., which is not limited herein.
In one embodiment, the main body 101 is made of the same metal as the grounding bus bar, and the tensile force of the main body 101 and the grounding bus bar is the same.
In one embodiment, the body 101 is provided with an anti-corrosion coating on the outside, and/or the body 101 is made of a corrosion-resistant material.
In an alternative embodiment, the pressurizing device 401 charges the hollow structure with a gas that is non-toxic and harmless, alternatively, the gas may be nitrogen, or other non-toxic and harmless gas, which is not limited herein.
In one embodiment, the pressurizing means 401 charges the hollow structure with a gas, which charges the air pressure in the hollow structure to be greater than the atmospheric pressure, preferably, the gas charges the air pressure in the hollow structure to be greater than 1.5 times the atmospheric pressure.
Specifically, after the pressurizing device 401 fills the hollow structure of the tension monitoring unit 100 with nitrogen, the pressure in the hollow structure is greater than the external atmospheric pressure, if the tension monitoring unit 100 breaks, the air pressure in the hollow structure detected by the air pressure gauge 402 will be consistent with the external atmospheric pressure, and if the tension monitoring unit 100 is intact, the air pressure in the hollow structure detected by the air pressure gauge 402 will exceed one atmospheric pressure. By the method, the breakpoint situation of the tension monitoring unit 100 is judged, and the breakpoint situation of the grounding bus can be further judged.
The beneficial effect of this scheme is: the pressurizing device 401 in the test unit 400 is used for charging a certain amount of gas into the hollow structure in the tension monitoring unit 100, and the barometer 402 is used for judging whether the air tightness in the tension monitoring unit 100 is good or not, so that the breakpoint condition of the tension monitoring unit 100 can be obtained. Because the tension monitoring unit 100 is close to the grounding bus of the grounding grid and is buried in the homogenous soil, and the tension born by the tension monitoring unit 100 and the grounding bus tend to be consistent, when the grounding bus breaks due to sedimentation, the tension monitoring unit 100 breaks, so that the break point condition of the grounding bus is reflected by detecting the break point condition of the tension monitoring unit 100. By the method, the breakpoint situation of the grounding grid is monitored, whether the air tightness of the tension monitoring unit 100 is good or not can be monitored without excavating the grounding grid in a large area, the breakpoint situation of the grounding grid is reflected, physical damage of the grounding grid is avoided, structural integrity is guaranteed, timeliness of finding the breakpoint situation of the grounding grid is improved, meanwhile, workload of basic-level testers is reduced, and working efficiency is improved.
In addition, the invention also provides a method for monitoring the mechanical breakpoint of the grounding grid, which uses the device for monitoring the mechanical breakpoint of the grounding grid to monitor, and comprises the following steps:
burying a ground bus of the tension monitoring unit close to the ground network to be monitored into soil, wherein the test interface is exposed out of the soil;
and connecting the testing unit with the tension monitoring unit through a second sealing interface device, testing the air tightness of the main body, and judging that a breakpoint occurs to the grounding bus if the main body is leaked.
Fig. 6 is a flowchart of a method for monitoring mechanical breakpoints of a grounding network, which specifically includes the following steps:
step S602, burying a tension monitoring unit close to a grounding bus of a grounding network to be monitored into soil, and exposing a test interface to the soil.
Specifically, the tension monitoring unit can be bound with the grounding bus of the grounding grid to be detected and buried in the homogeneous soil at the same time, the test interface is positioned above the ground, the access of subsequent test equipment is facilitated, and the tension born by the tension monitoring unit and the grounding bus is consistent, so that when the grounding bus is broken due to the fact that the grounding bus is pulled due to ground subsidence and the like, the tension monitoring unit is broken.
Step S604, connecting the testing unit with the tension monitoring unit through a second sealing interface device, and testing the air tightness of the main body.
Specifically, the test unit is connected with the tension monitoring unit through the second sealing interface device, wherein the interface of the tension monitoring unit and the second sealing interface device is of a double-spiral sealing structure, so that the air tightness of the device is ensured, and the air leakage of the device is prevented to influence the test effect.
In step S606, if the main body leaks gas, it is determined that the ground bus has a break point.
By detecting the air tightness of the main body of the tension monitoring unit, if the main body is leaked with gas, the ground bus is judged to have a break point, and if the main body is not leaked with gas, the ground bus is judged to be intact and not broken.
In one embodiment, the pressurizing device is a booster pump, and is configured to test the air tightness of the main body, where before determining that the break point occurs in the ground bus in step S606 if the main body leaks air, as shown in fig. 7, the device further includes:
step S701, pressurizing by charging gas into the main body through a booster pump;
specifically, nitrogen may be charged into the main body by the booster pump such that the air pressure in the main body is equal to the first threshold value.
And step S702, stopping filling gas into the main body through the booster pump, and judging that a breakpoint occurs to the grounding bus if the reading of the barometer is smaller than a first threshold value after the first time passes.
Specifically, the barometer is used for testing the air pressure in the main body, if the reading of the barometer is smaller than a first threshold value after a period of time, the ground bus is judged to have a break point, and if other conditions are met, the ground bus is judged to be perfect, and no break point is found. In one embodiment, the first time may be 5 minutes to 30 minutes, since the barometer cannot detect the pressure higher than one atmosphere for a long time.
In the description of the present specification, reference to the terms "some embodiments," "other embodiments," "desired embodiments," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (9)

1. The grounding grid mechanical breakpoint monitoring device is characterized by comprising a tension monitoring unit, wherein the tension monitoring unit comprises a main body and a test interface, an anti-corrosion coating is arranged outside the main body, and/or the main body is made of an anti-corrosion material, and is of a hollow structure, and the test interface is used for externally connecting test equipment, so that the test equipment is communicated with the hollow structure through the test interface to test the air tightness of the main body;
the tension monitoring unit is used for being close to the ground busbar of the ground network to be monitored and buried in the soil, the test interface is exposed out of the soil after the tension monitoring unit is buried in the soil, and the breaking tension of the main body and the breaking tension of the ground busbar tend to be consistent, so that whether break points occur to the ground busbar can be judged according to the air tightness.
2. The ground network mechanical breakpoint monitoring device of claim 1, wherein the tension monitoring unit further comprises a first sealing interface device, the first sealing interface device being sealingly connected to the body through the test interface.
3. The ground net mechanical breakpoint monitoring device according to claim 2, wherein the first sealing interface device is a sealing cover, the main body is a hollow cylindrical structure, a first end of the hollow cylindrical structure is closed, and a second end of the hollow cylindrical structure is in sealing connection with the sealing cover.
4. The ground net mechanical break monitoring device of claim 1, wherein the body is of the same metal as the ground bus.
5. The device of claim 3, wherein the hollow cavity comprises a first cylindrical cavity and a second cylindrical cavity which are communicated with each other, the second cylindrical cavity is located at the second end, the first cylindrical cavity is located at one end of the second cylindrical cavity close to the first end, the first cylindrical cavity and the second cylindrical cavity are coaxially arranged, the diameter of the second cylindrical cavity is larger than that of the first cylindrical cavity, the sealing cover comprises a first cylindrical and a second cylindrical which are connected with each other, the diameter of the first cylindrical cavity is matched with that of the first cylindrical cavity, the diameter of the second cylindrical cavity is matched with that of the second cylindrical cavity, the first cylindrical cavity and the second cylindrical cavity are provided with internal threads, and the first cylindrical cavity and the second cylindrical cavity are provided with external threads.
6. The ground net mechanical break point monitoring device according to any one of claims 1-5, further comprising a testing unit, wherein the testing unit comprises a pressurizing device, a barometer, a second sealing interface device and a gas channel, the second sealing interface device is provided with a through hole, the pressurizing device and the barometer are communicated with the through hole through the gas channel, the testing unit is used for being connected with the main body through the second sealing interface device during testing, so that the testing unit and the main body form a sealing structure, and the pressurizing device is used for pressurizing gas in the main body to judge the air tightness of the main body through the barometer.
7. The device of claim 6, wherein the pressurizing device is a booster pump for pressurizing the gas in the body.
8. A method for monitoring mechanical breakpoints of a ground network, characterized in that the method is carried out by using the device for monitoring mechanical breakpoints of the ground network according to claim 6, and comprises the following steps:
burying the tension monitoring unit into soil close to a grounding bus of a grounding network to be monitored, wherein the test interface is exposed out of the soil;
connecting the testing unit with the tension monitoring unit through the second sealing interface device, testing the air tightness of the main body, and judging that a breakpoint occurs to the grounding bus if the main body is leaked with air; the outside of the main body is provided with an anti-corrosion coating, and/or the main body is made of a corrosion-resistant material.
9. The method of claim 8, wherein the pressurizing device is a booster pump, and the step of testing the air tightness of the main body, and if the main body leaks air, determining that the breakpoint occurs in the ground bus comprises:
pressurizing the gas filled into the main body through the booster pump;
and stopping filling gas into the main body through the booster pump, and judging that a breakpoint occurs to the grounding bus if the reading of the barometer is smaller than a first threshold value after the first time.
CN202011183496.2A 2020-10-29 2020-10-29 Grounding grid mechanical breakpoint monitoring device and method Active CN112540258B (en)

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CN1110707C (en) * 1999-07-02 2003-06-04 清华大学 Diagnosis method of earth screen corrosion and breakpoint of electric substation and its measurement and diagnosis system
CN102680820A (en) * 2012-05-08 2012-09-19 湖州电力局 Automatic testing and diagnosing system for corrosion fault points of grounding grid of substation
CN103792461B (en) * 2013-11-21 2016-08-17 国家电网公司 A kind of grounded screen breaking point diagnosis method of transient electromagnetic method
CN107144494A (en) * 2017-06-14 2017-09-08 深圳供电局有限公司 Digging-free formula grounding net of transformer substation extent of corrosion monitoring device and method based on air pressure change
CN107340227A (en) * 2017-06-14 2017-11-10 深圳供电局有限公司 Digging-free formula grounding net of transformer substation extent of corrosion monitoring device based on vacuum

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