CN112379207A - Comprehensive monitoring device for state of sheath cable and stealing and cutting monitoring method - Google Patents
Comprehensive monitoring device for state of sheath cable and stealing and cutting monitoring method Download PDFInfo
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- CN112379207A CN112379207A CN202011354186.2A CN202011354186A CN112379207A CN 112379207 A CN112379207 A CN 112379207A CN 202011354186 A CN202011354186 A CN 202011354186A CN 112379207 A CN112379207 A CN 112379207A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000012806 monitoring device Methods 0.000 title claims abstract description 17
- 230000003750 conditioning effect Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention relates to a device for comprehensively monitoring the state of a sheath cable and a method for monitoring stealing and cutting, which monitor the current of the sheath cable by adopting a low-voltage signal output by a Rogowski coil, avoid the danger of a detection signal to a user, and judge the stealing and cutting phases of the cable by utilizing the values of the collected sheath current and the operation current. The monitoring device and the monitoring method provided by the invention have the advantages of simple construction, low cost and high accuracy.
Description
Technical Field
The invention relates to the technical field related to monitoring of elements of an electric power system, in particular to a comprehensive monitoring device and an anti-theft monitoring method for the state of a sheath cable.
Background
Power cables and tunnels have become the main artery of urban power transmission and play a vital role in the safety of power supply of the whole city. The size of the grounding current of the metal sheath of the cable is an important measure of the health state of the cable, the grounding current plays a vital role in the safe operation of the cable, and the potential hazards cannot be timely found by adopting a periodic measurement mode, so that an online monitoring mode is particularly important.
In the prior art, an electromagnetic current transformer is usually adopted for collecting the current of the cable sheath, and the transformer is very heavy, is not beneficial to site construction and has the risk of secondary open circuit. In addition, for the sheath cable cutting monitoring, an external vibration sensor (or an inclination angle sensor) is generally adopted, and in the application scene of an underground pipe gallery, the protection of the shell of the sensor is required to reach IP68, and meanwhile, a direct current power supply is required to be provided for the sensor. Therefore, the sheath cable stealing and cutting monitoring scheme in the prior art is complex in engineering implementation and high in cost.
Disclosure of Invention
Based on the above situation in the prior art, the present invention aims to provide a comprehensive monitoring device and a theft-cut monitoring method for the state of a sheath cable, which are simple in construction and low in cost, so as to realize comprehensive monitoring and theft-cut monitoring for the state of the sheath cable.
In order to achieve the above object, according to one aspect of the present invention, there is provided a comprehensive monitor device for the condition of a sheath cable, comprising a main monitor control module and a monitor sensor module; wherein the content of the first and second substances,
the monitoring sensor module comprises at least three sheath current Rogowski coil sensors, one running current Rogowski coil sensor and a cable temperature sensor;
and the main monitoring control module is connected with each sensor in the monitoring sensor module and used for conditioning, analyzing, processing and remotely transmitting data output by each sensor.
Further, the sheath current rogowski coil sensor collects sheath current of the cable to realize monitoring of the grounding current of the cable sheath.
Furthermore, the operating current Rogowski coil sensor collects the operating current of the cable so as to realize the monitoring of the operating current of the cable.
Furthermore, the cable temperature sensor collects the temperature of the cable joint so as to monitor the temperature of the cable joint.
According to a second aspect of the present invention, there is provided a method for monitoring stealing and cutting of a sheath cable, which is performed by using the device for comprehensively monitoring the state of the sheath cable according to the first aspect of the present invention, and comprises the steps of:
connecting the main monitoring control module with one path of running current Rogowski coil sensor and three paths of sheath current Rogowski coil sensors;
the Rogowski coil sensor for collecting the running current Iyx；
The three-way sheath current Rogowski coil sensor respectively collects A-phase sheath current IahcB-phase sheath current IbhcC-phase sheath current Ichc；
When I isyx＞0、Ibhc＞0、Ichc> 0 and IahcAnd if the value is 0, judging that the A-phase sheath cable is cut illegally.
Further, when Iyx＞0、Iahc＞0、Ichc> 0 and IbhcAnd if the value is 0, judging that the B-phase sheath cable is cut illegally.
Further, when Iyx＞0、Iahc＞0、Ibhc> 0 and IchcAnd if the number is 0, judging that the C-phase sheath cable is cut illegally.
According to a third aspect of the present invention, there is provided a method for monitoring stealing and cutting of a sheath cable, which is performed by using the device for comprehensively monitoring the state of the sheath cable according to the first aspect of the present invention, and comprises the steps of:
connecting the main monitoring control module with the three sheath current Rogowski coil sensors;
the three-way sheath current Rogowski coil sensor respectively collects A-phase sheath current IahcB-phase sheath current IbhcC-phase sheath current Ichc；
When I isbhc＞0、Ichc> 0 and IahcAnd if the value is 0, judging that the A-phase sheath cable is cut illegally.
Further, when Iahc＞0、Ichc> 0 and IbhcAnd if the value is 0, judging that the B-phase sheath cable is cut illegally.
Further, when Iahc＞0、Ibhc> 0 and IchcAnd if the number is 0, judging that the C-phase sheath cable is cut illegally.
In summary, the present invention provides a device for comprehensively monitoring the state of a sheath cable and a method for monitoring stealing-cutting, which monitor the current of the sheath cable by using a low-voltage signal output by a rogowski coil, avoid the danger of the detection signal to the user, and determine the stealing-cutting phase of the cable by using the values of the collected sheath current and the collected running current. The monitoring device and the monitoring method provided by the invention have the advantages of simple construction, low cost and high accuracy.
Drawings
FIG. 1 is a schematic view of the overall structure of the comprehensive monitoring device for the state of a sheath cable according to the present invention;
FIG. 2 is a schematic connection diagram of the comprehensive monitoring device for the state of the sheath cable according to the present invention;
FIG. 3 is a flow chart of the method for monitoring the stealing and cutting of a sheath cable according to the present invention 1;
fig. 4 is a flow chart 2 of the sheath cable cutting and theft monitoring method of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. According to a first embodiment of the present invention, there is provided a sheathed cable state comprehensive monitoring device, the overall structure of which is schematically shown in fig. 1, comprising: the monitoring system comprises a main monitoring control module 1 and a monitoring sensor module. The monitoring sensor module comprises at least three sheath current Rogowski coil sensors 2, one running current Rogowski coil sensor 3 and a cable temperature sensor 4. The main monitoring control module 1 is connected with each sensor in the monitoring sensor module, and is used for conditioning, analyzing, processing and remotely transmitting data output by each sensor. Fig. 2 shows a schematic connection diagram of the comprehensive monitoring device for the state of the sheath cable of the present invention. The sheath current Rogowski coil sensor 2 and the operating current Rogowski coil sensor 3 respectively collect sheath current and operating current, and therefore high-voltage cable sheath grounding current monitoring and cable operating current monitoring are achieved. The output of the secondary side of the Rogowski coil current sensor is a weak voltage signal, so that the Rogowski coil current sensor cannot cause damage to construction and operation and maintenance personnel. The main monitoring control module 1 has the warning functions of out-of-limit sheath current, three-phase imbalance, maximum-minimum ratio and the like. The sheath current Rogowski coil sensor 2 and the operating current Rogowski coil sensor 3 respectively collect the sheath current and the operating current of the cable, and therefore stealing and cutting monitoring of the high-voltage cable sheath cable can be achieved.
According to a second embodiment of the present invention, there is provided a method for monitoring stealing and cutting of a sheath cable, which is performed by using the device for comprehensively monitoring the state of the sheath cable according to the first embodiment of the present invention, and a flowchart of the monitoring method is shown in fig. 3, and includes the steps of:
connecting the main monitoring control module with one path of running current Rogowski coil sensor and three paths of sheath current Rogowski coil sensors;
the Rogowski coil sensor for collecting the running current Iyx；
The three-way sheath current Rogowski coil sensor respectively collects A-phase sheath current IahcB-phase sheath current IbhcC-phase sheath current Ichc；
When I isyx＞0、Ibhc＞0、Ichc> 0 and IahcAnd if the value is 0, judging that the A-phase sheath cable is cut illegally.
When I isyx＞0、Iahc＞0、Ichc> 0 and IbhcAnd if the value is 0, judging that the B-phase sheath cable is cut illegally.
When I isyx＞0、Iahc＞0、Ibhc> 0 and IchcIf 0, judging that the C-phase sheath cable is cut illegally
According to a third embodiment of the present invention, there is provided a method for monitoring stealing and cutting of a sheath cable, which is performed by using the device for comprehensively monitoring the state of the sheath cable according to the first embodiment of the present invention, and a flowchart of the monitoring method is shown in fig. 4, and includes the steps of:
connecting the main monitoring control module with the three sheath current Rogowski coil sensors;
the three-way sheath current Rogowski coil sensor respectively collects A-phase sheath current IahcB-phase sheath current IbhcC-phase sheath current Ichc；
When I isbhc＞0、Ichc> 0 and IahcAnd if the value is 0, judging that the A-phase sheath cable is cut illegally.
Further, when Iahc＞0、Ichc> 0 and IbhcAnd if the value is 0, judging that the B-phase sheath cable is cut illegally.
Further, when Iahc＞0、Ibhc> 0 and IchcAnd if the number is 0, judging that the C-phase sheath cable is cut illegally.
In summary, the present invention relates to a device for comprehensively monitoring the state of a sheath cable and a method for monitoring stealing and cutting, wherein a rogowski coil is used to output a low voltage signal to monitor the current of the sheath cable, so as to avoid the danger of the detection signal to the user, and the stolen and cut phases of the cable are determined by using the values of the collected sheath current and the operation current. The monitoring device and the monitoring method provided by the invention have the advantages of simple construction, low cost and high accuracy.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. A comprehensive monitoring device for the state of a sheath cable is characterized by comprising a main monitoring control module and a monitoring sensor module; wherein the content of the first and second substances,
the monitoring sensor module comprises at least three sheath current Rogowski coil sensors, one running current Rogowski coil sensor and a cable temperature sensor;
and the main monitoring control module is connected with each sensor in the monitoring sensor module and used for conditioning, analyzing, processing and remotely transmitting data output by each sensor.
2. The monitoring device of claim 1, wherein the sheath current rogowski coil sensor collects sheath current of the cable to achieve cable sheath ground current monitoring.
3. The monitoring device of claim 2, wherein the operating current Rogowski coil sensor collects operating current of the cable to realize cable operating current monitoring.
4. The monitoring device of claim 3, wherein the cable temperature sensor collects cable joint temperature for cable joint temperature monitoring.
5. A method for monitoring cutting theft of a sheath cable, characterized in that the comprehensive monitoring device for the sheath cable state according to any one of claims 1 to 4 is used for monitoring, comprising the steps of:
connecting the main monitoring control module with one path of running current Rogowski coil sensor and three paths of sheath current Rogowski coil sensors;
the Rogowski coil sensor for collecting the running current Iyx；
The three-way sheath current Rogowski coil sensor respectively collects A-phase sheath current IahcB-phase sheath current IbhcC-phase sheath current Ichc；
When I isyx＞0、Ibhc＞0、Ichc> 0 and IahcAnd if the value is 0, judging that the A-phase sheath cable is cut illegally.
6. The monitoring method according to claim 5,
when I isyx＞0、Iahc＞0、Ichc> 0 and IbhcAnd if the value is 0, judging that the B-phase sheath cable is cut illegally.
7. The monitoring method according to claim 6,
when I isyx＞0、Iahc＞0、Ibhc> 0 and IchcAnd if the number is 0, judging that the C-phase sheath cable is cut illegally.
8. A method for monitoring cutting theft of a sheath cable, characterized in that the comprehensive monitoring device for the sheath cable state according to any one of claims 1 to 4 is used for monitoring, comprising the steps of:
connecting the main monitoring control module with the three sheath current Rogowski coil sensors;
the three-way sheath current Rogowski coil sensor respectively collects A-phase sheath current IahcB-phase sheath current IbhcC-phase sheath current Ichc；
When I isbhc＞0、Ichc> 0 and IahcAnd if the value is 0, judging that the A-phase sheath cable is cut illegally.
9. The monitoring method according to claim 8,
when I isahc＞0、Ichc> 0 and IbhcAnd if the value is 0, judging that the B-phase sheath cable is cut illegally.
10. The monitoring method according to claim 9,
when I isahc＞0、Ibhc> 0 and IchcAnd if the number is 0, judging that the C-phase sheath cable is cut illegally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011354186.2A CN112379207A (en) | 2020-11-26 | 2020-11-26 | Comprehensive monitoring device for state of sheath cable and stealing and cutting monitoring method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011354186.2A CN112379207A (en) | 2020-11-26 | 2020-11-26 | Comprehensive monitoring device for state of sheath cable and stealing and cutting monitoring method |
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| CN112379207A true CN112379207A (en) | 2021-02-19 |
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| CN202011354186.2A Pending CN112379207A (en) | 2020-11-26 | 2020-11-26 | Comprehensive monitoring device for state of sheath cable and stealing and cutting monitoring method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007298483A (en) * | 2006-05-08 | 2007-11-15 | Daido Steel Co Ltd | Disconnection detector of flexible cable for alternating current arc furnace |
| CN101201960A (en) * | 2006-12-15 | 2008-06-18 | 党金春 | Cable anti-theft alarm system |
| CN207636656U (en) * | 2017-12-04 | 2018-07-20 | 武汉华威众科电力有限公司 | A kind of cable sheath grounding circulation on-line monitoring equipment |
| CN208860895U (en) * | 2018-08-30 | 2019-05-14 | 广东拓宇科技有限公司 | A kind of high-tension cable earth current monitoring device |
| CN110850149A (en) * | 2018-08-02 | 2020-02-28 | 许继集团有限公司 | High-voltage cable metal sheath grounding monitoring method and system |
-
2020
- 2020-11-26 CN CN202011354186.2A patent/CN112379207A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007298483A (en) * | 2006-05-08 | 2007-11-15 | Daido Steel Co Ltd | Disconnection detector of flexible cable for alternating current arc furnace |
| CN101201960A (en) * | 2006-12-15 | 2008-06-18 | 党金春 | Cable anti-theft alarm system |
| CN207636656U (en) * | 2017-12-04 | 2018-07-20 | 武汉华威众科电力有限公司 | A kind of cable sheath grounding circulation on-line monitoring equipment |
| CN110850149A (en) * | 2018-08-02 | 2020-02-28 | 许继集团有限公司 | High-voltage cable metal sheath grounding monitoring method and system |
| CN208860895U (en) * | 2018-08-30 | 2019-05-14 | 广东拓宇科技有限公司 | A kind of high-tension cable earth current monitoring device |
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Application publication date: 20210219 |
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