CN220042583U - Intelligent protection grounding box - Google Patents
Intelligent protection grounding box Download PDFInfo
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- CN220042583U CN220042583U CN202320805774.6U CN202320805774U CN220042583U CN 220042583 U CN220042583 U CN 220042583U CN 202320805774 U CN202320805774 U CN 202320805774U CN 220042583 U CN220042583 U CN 220042583U
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- grounding
- current
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- monitoring
- box
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- 238000012544 monitoring process Methods 0.000 claims abstract description 38
- 238000004891 communication Methods 0.000 claims abstract description 24
- 239000002184 metal Substances 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 230000001012 protector Effects 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000013500 data storage Methods 0.000 claims description 3
- 239000011241 protective layer Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims 7
- 230000005856 abnormality Effects 0.000 abstract description 11
- 238000012423 maintenance Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 7
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model discloses an intelligent protection grounding box, which comprises a box body, a grounding assembly and a monitoring assembly, wherein the grounding assembly and the monitoring assembly are arranged in the box body, and the monitoring assembly comprises: the high-frequency current sensor is arranged on the cable joint and is used for collecting partial discharge pulse current signals at the joint; the current transformer is arranged on the cable joint and is used for collecting grounding circular current signals of the grounding point of the metal sheath of the high-voltage cable; the partial discharge data acquisition device is in communication connection with the high-frequency current sensor and is used for converting the pulse current signal into a digital signal; the loop current collector is in communication connection with the current transformer and is used for converting the grounding loop current signal into a digital signal; the grounding box is also provided with a communication component used for transmitting digital signals output by the partial discharge data collector and the circulating current collector to a monitoring center. The intelligent protection grounding box disclosed by the utility model can realize partial discharge monitoring, and can observe the abnormality before the abnormality occurs, so that the power system is maintained at a better period.
Description
Technical Field
The utility model relates to an intelligent protection grounding box, and belongs to the technical field of power equipment.
Background
The high-voltage grounding box is connecting equipment for collecting grounding wires of high-voltage grounding cables, and has the problems of easiness in theft, easiness in occurrence of safety accidents such as cable breakdown and the like.
Aiming at the problems, a system which is antitheft and can be monitored on line in real time is provided in the prior art to solve the problems of cable circulation, cable temperature and equipment safety in the current power cable real-time operation, such as the China patent application number 2021203527958.
However, through long-term practical use, it was found that the above-described grounding box, while enabling real-time monitoring of the grounding cable, could only be monitored if significant damage to the cable occurred. Once abnormality is detected, maintenance is needed immediately, due to the burstiness of the monitoring abnormal result, the work of maintenance personnel is not planned, no matter can be done by the maintenance personnel in part of time, abnormality occurs in a plurality of places in part of time, the problem that the maintenance personnel is insufficient is solved, new potential safety hazard is brought, and the stability of the power system is reduced.
For the above reasons, further research into the existing intelligent protection and grounding box is necessary in order to solve the above problems.
Disclosure of Invention
In order to overcome the above problems, the present inventors have conducted intensive studies and have proposed an intelligent protection grounding box comprising a box body and a grounding assembly disposed in the box body, a monitoring assembly including a plurality of grounding cables, a grounding copper plate connecting the plurality of grounding cables, a grounding terminal disposed at an end of the grounding cables, and a sheath protector, the monitoring assembly including:
the high-frequency current sensor is arranged on the cable joint and is used for collecting partial discharge pulse current signals at the joint,
the current transformer is arranged on the cable joint and is used for collecting grounding circular current signals of the grounding point of the metal sheath of the high-voltage cable,
the partial discharge data acquisition device is in communication connection with the high-frequency current sensor and is used for converting pulse current signals into digital signals,
the loop current collector is in communication connection with the current transformer and is used for converting the grounding loop current signal into a digital signal,
the grounding box is also provided with a communication component used for transmitting digital signals output by the partial discharge data collector and the circulating current collector to a monitoring center.
In a preferred embodiment, the high-frequency current sensor is an open-close clamp sensor.
In a preferred embodiment, the monitoring assembly further comprises:
the data storage is used for storing the digital signals output by the partial discharge data acquisition unit;
and the comparator is used for comparing the difference value between the existing data in the data memory and the new output data of the data acquisition unit, and transmitting the new output data to the communication assembly when the difference value is larger than a preset value.
In a preferred embodiment, the monitoring assembly further comprises:
a voltage transformer for obtaining a voltage signal of the grounding point of the metal sheath of the high-voltage cable,
and the voltage collector is connected with the voltage transformer and is used for calibrating and collecting the voltage signals.
In a preferred embodiment, the monitoring assembly further comprises a temperature sensor disposed adjacent to the outside of the cable for monitoring the skin temperature of the cable.
In a preferred embodiment, the power supply unit of the monitoring assembly has a transformer, a photovoltaic assembly and a controller, wherein,
the controller is connected with the photovoltaic module, converts the supplied electric energy sent by the photovoltaic module into stable direct-current voltage, supplies power to the monitoring module,
the transformer is connected with municipal power supply, converts alternating current into direct current and supplies power to the monitoring assembly.
In a preferred embodiment, the photovoltaic module is disposed above the housing.
In a preferred embodiment, the communication component is a wireless communication component.
The utility model has the beneficial effects that:
(1) Partial discharge monitoring can be realized, and abnormality can be observed before abnormality occurs, so that the power system is maintained at a better period;
(2) The integrated current transformer and the integrated voltage transformer are monitored, and when abnormality occurs, the abnormality can be rapidly detected, and emergency maintenance is performed.
Drawings
FIG. 1 is a schematic diagram showing the overall structure of an intelligent protection and grounding box according to a preferred embodiment of the present utility model;
FIG. 2 shows a schematic diagram of the structure of the intelligent protection grounding box high-frequency current sensor according to a preferred embodiment of the utility model;
fig. 3 shows a schematic structural diagram of an intelligent protection and grounding box monitoring assembly according to a preferred embodiment of the present utility model.
Reference numerals illustrate:
1-a box body;
21-a ground cable;
22-a grounded copper plate;
23-a ground terminal;
24-sheath protector;
31-a high-frequency current sensor;
32-a current transformer;
33-a partial discharge data collector;
34-loop collector.
Detailed Description
The utility model is further described in detail below by means of the figures and examples. The features and advantages of the present utility model will become more apparent from the description.
The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
According to the intelligent protection grounding box provided by the utility model, as shown in fig. 1, the intelligent protection grounding box comprises a box body 1, a grounding component and a monitoring component which are arranged in the box body, wherein the grounding component comprises a plurality of grounding cables 21, a grounding copper plate 22 connected with the plurality of grounding cables, a grounding terminal 23 arranged at the end part of the grounding cables and a protective layer protector 24,
the monitoring assembly 3 comprises:
a high-frequency current sensor 31 mounted on the cable joint for collecting partial discharge pulse current signals at the joint,
a current transformer 32, which is installed on the cable joint and is used for collecting the grounding circular current signal of the grounding point of the metal sheath of the high-voltage cable,
the partial discharge data collector 33 is communicatively connected with the high-frequency current sensor 31, for converting the pulse current signal into a digital signal,
a loop current collector 34, in communication with the current transformer 32, for converting the ground loop current signal to a digital signal,
the grounding box is also provided with a communication component used for transmitting digital signals output by the partial discharge data collector and the circulating current collector to a monitoring center.
Although the traditional grounding box can realize real-time monitoring of the grounding cable, the grounding box can only monitor the grounding cable when the cable outgoing line is obviously damaged. Once abnormality is detected, maintenance is needed immediately, due to the burstiness of the monitoring abnormal result, the work of maintenance personnel is not planned, no matter can be done by the maintenance personnel in part of time, abnormality occurs in a plurality of places in part of time, the problem that the maintenance personnel is insufficient is solved, new potential safety hazard is brought, and the stability of the power system is reduced.
The high-frequency current sensor and the partial discharge data collector are electronic components commonly used in partial discharge detection, and the specific model is not particularly limited in the utility model.
The current transformer and the loop current collector are electronic components commonly used in mutual inductance current detection, for example, LMZK1 is used as the current transformer, and ACS210D is used as the loop current collector.
In the utility model, on the basis of the traditional grounding box, the high-frequency current sensor 31 and the partial discharge data collector 33 are added to monitor the partial discharge performance of the cable, and the cable is monitored to perform early warning before abnormality occurs, so that maintenance staff can maintain the possible abnormal schedule, the utilization rate of the staff is improved, and the hidden danger of the power system is reduced.
Preferably, the partial discharge data collector is in communication connection with the high-frequency current sensor through a coaxial cable.
In a preferred embodiment, the high-frequency current sensor 31 is an open-close type clamp sensor, as shown in fig. 2, and the open-close type clamp sensor is adopted, so that the open-close type clamp sensor is convenient to detach and install, and does not need power failure in the installation process, so that the existing grounding box can be modified and upgraded conveniently.
In a preferred embodiment, as shown in fig. 3, the monitoring assembly further comprises:
the data storage is used for storing the digital signals output by the partial discharge data acquisition unit;
and the comparator is used for comparing the difference value between the existing data in the data memory and the new output data of the data acquisition unit, and transmitting the new output data to the communication assembly when the difference value is larger than a preset value.
In the present utility model, the specific model of the data memory and the comparator are not particularly limited, and a person skilled in the art can select according to actual needs, for example, the data memory adopts a flash memory chip, and the comparator adopts a singlechip.
The detection of the high-frequency current sensor is real-time, that is, the detection of partial discharge is real-time, however, in practical use, frequent detection has little meaning, and a large amount of signal transmission resources are wasted, especially when wireless signal transmission, such as 4G/5G communication, is adopted, and the cost is increased obviously. However, the periodic detection is adopted, partial discharge is possibly generated, but the phenomenon cannot be found by the monitoring center due to the fact that the periodic detection time is not reached.
Optionally, the monitoring center can actively call the output data of the partial discharge data collector at any time.
In a preferred embodiment, the monitoring assembly further comprises:
a voltage transformer for obtaining a voltage signal of the grounding point of the metal sheath of the high-voltage cable,
and the voltage collector is connected with the voltage transformer and is used for calibrating and collecting the voltage signals.
Through voltage transformer and voltage collector, measure and in time transmit monitoring center to the voltage, can in time discover the unusual that the cable appears to quick processing. Preferably, the voltage transformer adopts a 0-100A single-mode accurate voltage transformer (for example, JDZX9-35 voltage transformer), and the voltage collector adopts an accurate voltage collector (for example, an MCE-AV42 voltage intelligent collector) so as to accurately detect the voltage.
In a preferred embodiment, the monitoring assembly further comprises a temperature sensor, the temperature sensor is arranged to be closely attached to the outer side of the cable and used for monitoring the skin temperature of the cable, the phenomenon that the cable is too high in temperature due to the fact that the cable sheath is damaged is timely found, and the occurrence rate of potential safety hazards of the circuit is reduced.
According to a preferred embodiment of the utility model, the power supply unit of the monitoring assembly has a transformer, a photovoltaic assembly and a controller, wherein,
the controller is connected with the photovoltaic module, converts the supplied electric energy sent by the photovoltaic module into stable direct-current voltage, supplies power to the monitoring module,
the transformer is connected with municipal power supply, converts alternating current into direct current and supplies power to the monitoring assembly.
Preferably, the photovoltaic module is arranged above the box body, so that flushing of rainwater and the like to the box body is reduced, and the service life of the box body is prolonged.
According to the utility model, the communication component adopts a wireless communication component, more preferably adopts a 4G/5G module for communication, and reduces wiring cost and installation cost.
In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "front", "rear", etc. are based on the positional or positional relationship in the operation state of the present utility model, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
The utility model has been described above in connection with preferred embodiments, which are, however, exemplary only and for illustrative purposes. On this basis, the utility model can be subjected to various substitutions and improvements, and all fall within the protection scope of the utility model.
Claims (8)
1. An intelligent protection grounding box comprises a box body, a grounding assembly and a monitoring assembly, wherein the grounding assembly and the monitoring assembly are arranged in the box body, the grounding assembly comprises a plurality of grounding cables, a grounding copper plate connected with the grounding cables, a grounding terminal and a protective layer protector, the grounding terminal and the protective layer protector are arranged at the end parts of the grounding cables,
the monitoring assembly includes:
the high-frequency current sensor is arranged on the cable joint and is used for collecting partial discharge pulse current signals at the joint,
the current transformer is arranged on the cable joint and is used for collecting grounding circular current signals of the grounding point of the metal sheath of the high-voltage cable,
the partial discharge data acquisition device is in communication connection with the high-frequency current sensor and is used for converting pulse current signals into digital signals,
the loop current collector is in communication connection with the current transformer and is used for converting the grounding loop current signal into a digital signal,
the grounding box is also provided with a communication component used for transmitting digital signals output by the partial discharge data collector and the circulating current collector to a monitoring center.
2. An intelligent protective grounding box as claimed in claim 1, wherein,
the high-frequency current sensor is an open-close clamp sensor.
3. An intelligent protective grounding box as claimed in claim 1, wherein,
the monitoring assembly further comprises:
the data storage is used for storing the digital signals output by the partial discharge data acquisition unit;
and the comparator is used for comparing the difference value between the existing data in the data memory and the new output data of the data acquisition unit, and transmitting the new output data to the communication assembly when the difference value is larger than a preset value.
4. An intelligent protective grounding box as claimed in claim 1, wherein,
the monitoring assembly further comprises:
a voltage transformer for obtaining a voltage signal of the grounding point of the metal sheath of the high-voltage cable,
and the voltage collector is connected with the voltage transformer and is used for calibrating and collecting the voltage signals.
5. An intelligent protective grounding box as claimed in claim 1, wherein,
the monitoring assembly further comprises a temperature sensor which is arranged to be clung to the outer side of the cable and used for monitoring the skin temperature of the cable.
6. An intelligent protective grounding box as claimed in claim 1, wherein,
the power supply unit of the monitoring assembly is provided with a transformer, a photovoltaic assembly and a controller, wherein,
the controller is connected with the photovoltaic module, converts the supplied electric energy sent by the photovoltaic module into stable direct-current voltage, supplies power to the monitoring module,
the transformer is connected with municipal power supply, converts alternating current into direct current and supplies power to the monitoring assembly.
7. An intelligent protective grounding box as claimed in claim 6, wherein,
the photovoltaic module is arranged above the box body.
8. An intelligent protective grounding box as claimed in claim 1, wherein,
the communication assembly adopts a wireless communication assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320805774.6U CN220042583U (en) | 2023-04-12 | 2023-04-12 | Intelligent protection grounding box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320805774.6U CN220042583U (en) | 2023-04-12 | 2023-04-12 | Intelligent protection grounding box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220042583U true CN220042583U (en) | 2023-11-17 |
Family
ID=88728359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320805774.6U Active CN220042583U (en) | 2023-04-12 | 2023-04-12 | Intelligent protection grounding box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220042583U (en) |
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2023
- 2023-04-12 CN CN202320805774.6U patent/CN220042583U/en active Active
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