CN107727996B - Electrical line connection degradation monitoring method - Google Patents
Electrical line connection degradation monitoring method Download PDFInfo
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- CN107727996B CN107727996B CN201710959677.1A CN201710959677A CN107727996B CN 107727996 B CN107727996 B CN 107727996B CN 201710959677 A CN201710959677 A CN 201710959677A CN 107727996 B CN107727996 B CN 107727996B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 45
- 230000015556 catabolic process Effects 0.000 title claims abstract description 35
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 23
- KFOPKOFKGJJEBW-ZSSYTAEJSA-N methyl 2-[(1s,7r,8s,9s,10r,13r,14s,17r)-1,7-dihydroxy-10,13-dimethyl-3-oxo-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl]acetate Chemical compound C([C@H]1O)C2=CC(=O)C[C@H](O)[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H](CC(=O)OC)[C@@]1(C)CC2 KFOPKOFKGJJEBW-ZSSYTAEJSA-N 0.000 claims abstract description 4
- 238000004364 calculation method Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
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- H02J13/0006—
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses an electrical line connection degradation monitoring method, which comprises the following steps: A. continuously monitoring the connection impedance of a line connection point for a period of time through a sensor and a controller, wherein the monitoring frequency is 3000 times per second, and the average value is taken as an initial connection impedance value R; B. continuously monitoring the operation connection impedance value r of the line connection point through a sensor and a controller, wherein the monitoring frequency is 3000 times per second, and calculating the derivative V of the change value of the operation connection impedance value r per millisecond; C. comparing the running connection impedance value R with the initial connection impedance value R through a controller, and if R is larger than or equal to R and V is larger than or equal to 1.5R omega/ms, judging that accelerated connection degradation occurs at the line connection point; D. and if the accelerated connection degradation of the line connection point is judged, the controller controls the relay to perform power-off protection. The method for monitoring the connection degradation of the electric circuit can timely find the accelerated connection degradation of the connection point by monitoring the current condition of the connection point of the electric circuit in real time, quickly perform control processing and information release, and effectively avoid the occurrence of damages such as arc discharge and the like, thereby ensuring the safe operation of the electric circuit.
Description
Technical Field
The invention relates to a power utilization safety monitoring method, in particular to an electrical line connection degradation monitoring method.
Background
The electric circuit connection point is a weak point on the electric circuit, and phenomena such as looseness, falling and the like easily occur, so that arc discharge is easily caused, an electric accident is caused, and property and life safety of people are seriously harmed. At present, an effective means for monitoring the deterioration of the connection point of the electric line in real time is lacked, so that the situation that the electric line is not protected in the bud and the safe power utilization management cannot be realized.
Disclosure of Invention
The invention aims to provide an electric line connection degradation monitoring method, which can timely find the accelerated degradation of an electric line connection point by monitoring the current condition of the electric line connection point so as to facilitate the electricity safety supervision.
In order to solve the technical problems, the invention adopts the following technical scheme:
an electrical line connection degradation monitoring method comprising the steps of: A. continuously monitoring the connection impedance of a line connection point for a period of time through a sensor and a controller, wherein the monitoring frequency is 3000 times per second, and the average value is taken as an initial connection impedance value R; B. continuously monitoring the operation connection impedance value r of the line connection point through a sensor and a controller, wherein the monitoring frequency is 3000 times per second, and calculating the derivative V of the change value of the operation connection impedance value r per millisecond; C. comparing the running connection impedance value R with the initial connection impedance value R through a controller, and if R is larger than or equal to R and V is larger than or equal to 1.5R omega/ms, judging that accelerated connection degradation occurs at the line connection point; D. and if the accelerated connection degradation of the line connection point is judged, the controller controls the relay to perform power-off protection. The invention relates to an electric circuit connection degradation monitoring method, which is characterized in that a current sensor and a controller are used for learning and counting the maximum current value of an electricity utilization unit within a certain time interval, then the current condition of the electricity utilization unit is monitored in real time, if the current suddenly increases and exceeds a certain range of the learned maximum current value and is accelerated to increase, the abnormal load is judged to be increased, and at the moment, a relay is started, the power supply of the electricity utilization unit is cut off, and the power-off protection is carried out.
Preferably, the current sensor in steps a and B is a hall current sensor, and the initial connection resistance value R and the operation connection resistance value R are obtained by calculation, that is, by calculation of R = U/I.
Preferably, the continuous monitoring in step A is carried out for a period of 1 to 10 days.
Preferably, in the step D, if it is determined that accelerated connection degradation occurs at the line connection point, the controller starts the alarm to give an alarm at the same time, so as to facilitate timely maintenance.
Preferably, in the step D, if it is determined that accelerated connection degradation occurs at the line connection point, the monitoring information is uploaded to the background server through the communication unit on the controller, so as to facilitate remote monitoring and data storage.
Preferably, the controller in step a is provided with a relearning start button, so that step a is restarted, that is, relearning, when a large change occurs in the electrical equipment on the electrical circuit.
Compared with the prior art, the electrical line connection degradation monitoring method has the beneficial effects that: through the current condition of real-time supervision electric wire tie point, in time discover the acceleration of tie point and connect the degradation to control rapidly and handle and information issuing, can effectively avoid drawing harm such as arc to appear, thereby guarantee electric wire's safe operation.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic diagram of a method of monitoring degradation of an electrical line connection according to the present invention.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
As shown in fig. 1, the present invention provides a method for monitoring degradation of electrical line connection, comprising the steps of: A. continuously monitoring the connection impedance of the line connection point for a period of time through a sensor and a controller, wherein the monitoring frequency is 3000 times per second, and the average value is taken as an initial connection impedance value R, and the process can be called as a learning process; B. continuously monitoring the operation connection impedance value r of the line connection point through a sensor and a controller, wherein the monitoring frequency is 3000 times per second, and calculating the derivative V of the change value of the operation connection impedance value r per millisecond; C. comparing the running connection impedance value R with the initial connection impedance value R through a controller, and if R is larger than or equal to R and V is larger than or equal to 1.5R omega/ms, judging that accelerated connection degradation occurs at the line connection point; D. and if the accelerated connection degradation of the line connection point is judged, the controller controls the relay to perform power-off protection. The controller comprises a single chip microcomputer with the model of STC15W408 AS.
As shown in fig. 1, in the method for monitoring the connection degradation of the electrical line according to the present invention, the current sensor in steps a and B is a hall current sensor, and the initial connection resistance value R and the operational connection resistance value R are obtained by calculation. The continuous monitoring time in the step A is 1-10 days. And D, if the accelerated connection degradation of the line connection point is judged, starting an alarm by the controller to alarm. And D, if the accelerated connection degradation of the line connection point is judged, uploading the monitoring information to the background server through a communication unit on the controller. And a relearning starting button is arranged on the controller in the step A.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A method of monitoring degradation of an electrical line connection, comprising the steps of:
A. continuously monitoring the connection impedance of a line connection point for a period of time through a sensor and a controller, wherein the monitoring frequency is 3000 times per second, and the average value is taken as an initial connection impedance value R;
B. continuously monitoring the operation connection impedance value r of the line connection point through a sensor and a controller, wherein the monitoring frequency is 3000 times per second, and calculating the derivative V of the change value of the operation connection impedance value r per millisecond;
C. comparing the running connection impedance value R with the initial connection impedance value R through a controller, and if R is larger than or equal to R and V is larger than or equal to 1.5R omega/ms, judging that accelerated connection degradation occurs at the line connection point;
D. and if the accelerated connection degradation of the line connection point is judged, the controller controls the relay to perform power-off protection.
2. An electrical line connection degradation monitoring method as claimed in claim 1, characterized in that: and B, the current sensor in the step A and the step B is a Hall current sensor, and the initial connection resistance value R and the operation connection resistance value R are obtained through calculation.
3. An electrical line connection degradation monitoring method as claimed in claim 1, characterized in that: the continuous monitoring time in the step A is 1-10 days.
4. An electrical line connection degradation monitoring method as claimed in claim 1, characterized in that: and D, if the accelerated connection degradation of the line connection point is judged, starting an alarm by the controller to alarm.
5. An electrical line connection degradation monitoring method as claimed in claim 1, characterized in that: and D, if the accelerated connection degradation of the line connection point is judged, uploading the monitoring information to the background server through a communication unit on the controller.
6. An electrical line connection degradation monitoring method as claimed in claim 1, characterized in that: and a relearning starting button is arranged on the controller in the step A.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710959677.1A CN107727996B (en) | 2017-10-16 | 2017-10-16 | Electrical line connection degradation monitoring method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710959677.1A CN107727996B (en) | 2017-10-16 | 2017-10-16 | Electrical line connection degradation monitoring method |
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| Publication Number | Publication Date |
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| CN107727996A CN107727996A (en) | 2018-02-23 |
| CN107727996B true CN107727996B (en) | 2020-10-02 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016176924A (en) * | 2015-03-18 | 2016-10-06 | 積水化学工業株式会社 | Secondary battery deterioration detection system and method for detecting secondary battery deterioration |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3441596B2 (en) * | 1995-04-28 | 2003-09-02 | 三菱電機株式会社 | Insulation deterioration diagnosis device |
| DE19729599C1 (en) * | 1997-07-10 | 1999-02-04 | Siemens Ag | Method and arrangement for the detection of short circuits in low-voltage networks |
| CN101329381A (en) * | 2008-07-28 | 2008-12-24 | 庞元俊 | Method for detecting short circuit fault with current change rate |
| US9030210B2 (en) * | 2010-04-14 | 2015-05-12 | Mitsubishi Electric Corporation | Insulation deterioration diagnosis apparatus |
| CN102854428B (en) * | 2011-06-28 | 2016-01-06 | 西门子公司 | A kind of method for detecting short circuit and device |
| AT511807B1 (en) * | 2011-08-01 | 2013-03-15 | Univ Wien Tech | METHOD AND DEVICE FOR ONLINE RECOGNITION OF STATE-OF-CHARGE INSULATION IN AN ELECTRICAL MACHINE |
| CN103278711B (en) * | 2013-04-28 | 2016-01-06 | 福州大学 | The early detection of a kind of short trouble and series arc faults and discrimination method |
| CN105572544B (en) * | 2016-02-01 | 2019-03-08 | 河南理工大学 | Coal Mine Power Network short trouble quick judgment method based on current changing rate |
| CN106067612A (en) * | 2016-04-21 | 2016-11-02 | 中国北方车辆研究所 | High direct voltage electric connector and connection reliability checking method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016176924A (en) * | 2015-03-18 | 2016-10-06 | 積水化学工業株式会社 | Secondary battery deterioration detection system and method for detecting secondary battery deterioration |
Non-Patent Citations (1)
| Title |
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| 电力设备绝缘劣化诊断法;王云熙;《河北电力技术》;19900630(第3期);全文 * |
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