CN107884637B - Abnormal load monitoring method for electric circuit - Google Patents
Abnormal load monitoring method for electric circuit Download PDFInfo
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- CN107884637B CN107884637B CN201710960271.5A CN201710960271A CN107884637B CN 107884637 B CN107884637 B CN 107884637B CN 201710960271 A CN201710960271 A CN 201710960271A CN 107884637 B CN107884637 B CN 107884637B
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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
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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Abstract
The invention discloses a method for monitoring abnormal load of an electric circuit, which comprises the following steps: A. continuously monitoring the current value on the L line in a period of time by using a current sensor and a controller, wherein the monitoring frequency is 3000 times per second, and calculating to obtain a maximum current value I and a maximum derivative W of a current change value per microsecond; B. continuously monitoring the current value S of the power utilization unit during operation through a current sensor and a controller, wherein the monitoring frequency is 3000 times per second, and calculating the derivative V of the current change value per microsecond; C. comparing the current value S with the maximum current value I through a controller, and if S is larger than or equal to 120% I and W is larger than or equal to V and smaller than or equal to 30A/mu S, judging that the electricity utilization unit is loaded with an abnormal load; D. and if the abnormal load is judged to be loaded on the power utilization unit, the relay is controlled by the controller to cut off the power supply of the power utilization unit, so that power-off protection is performed. According to the invention, the increase of abnormal load can be found in time by monitoring the current condition of the power utilization unit in real time.
Description
Technical Field
The invention relates to a power utilization safety monitoring method, in particular to an abnormal load monitoring method for an electric circuit.
Background
The abnormal load is one of the important causes of overload of an electric circuit and electric fire, and often causes great property loss to people. At present, an effective means for monitoring abnormal loads of an electric circuit in real time is lacked, so that the problems can not be prevented and safe power utilization management can not be realized.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for monitoring abnormal load of an electric circuit, which can timely find the abnormal load condition by monitoring the line current condition of an electricity utilization unit so as to facilitate the electricity utilization safety supervision.
In order to solve the technical problems, the invention adopts the following technical scheme:
an abnormal load monitoring method for an electric circuit comprises the following steps: A. continuously monitoring the current value on the L line in a period of time by using a current sensor and a controller, wherein the monitoring frequency is 3000 times per second, and calculating to obtain a maximum current value I and a maximum derivative W of a current change value per microsecond; B. continuously monitoring the current value S of the power utilization unit during operation through a current sensor and a controller, wherein the monitoring frequency is 3000 times per second, and calculating the derivative V of the current change value per microsecond; C. comparing the current value S with the maximum current value I through a controller, and if S is larger than or equal to 120% I and W is larger than or equal to V and smaller than or equal to 30A/mu S, judging that the electricity utilization unit is loaded with an abnormal load; D. and if the abnormal load is judged to be loaded on the power utilization unit, the relay is controlled by the controller to cut off the power supply of the power utilization unit, so that power-off protection is performed. The invention discloses an abnormal load monitoring method of an electric circuit, 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.
Preferably, the duration of continuously monitoring the current value in the step A is 7 to 30 days.
Preferably, if it is determined in step D that the abnormal load is loaded on the power consumption unit, the controller starts the alarm to alarm, so as to facilitate timely maintenance.
Preferably, in the step D, if it is determined that the power consumption unit is loaded with the abnormal load, the monitoring information is uploaded to the background server through the communication unit on the controller, so that remote monitoring and data storage are facilitated.
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 method for monitoring the abnormal load of the electric circuit has the beneficial effects that: through the current condition of real-time supervision power consumption unit, in time discover the increase of unusual load to control rapidly and handle and information issuing, can ensure the safe power consumption of power consumption unit, also make things convenient for managers to the electrical apparatus management of power consumption unit, the power consumption environment such as specially adapted student's dormitory.
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 an abnormal load monitoring method for an electrical line 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 abnormal load monitoring method for an electrical line of the present invention includes the following steps: A. continuously monitoring the current value on the L line in a period of time by a current sensor and a controller, wherein the monitoring frequency is 3000 times per second, and calculating to obtain a maximum current value I and a maximum derivative W of a current change value per microsecond, wherein the process can be called as a learning process; B. continuously monitoring the current value S of the power utilization unit during operation through a current sensor and a controller, wherein the monitoring frequency is 3000 times per second, and calculating the derivative V of the current change value per microsecond; C. comparing the current value S with the maximum current value I through a controller, and if S is larger than or equal to 120% I and W is larger than or equal to V and smaller than or equal to 30A/mu S, judging that the electricity utilization unit is loaded with an abnormal load; D. and if the abnormal load is judged to be loaded on the power utilization unit, the relay is controlled by the controller to cut off the power supply of the power utilization unit, so that power-off protection is performed. Wherein, the L line is a live line. The controller comprises a single chip microcomputer with the model of STC15W408 AS.
As shown in fig. 1, in the abnormal load monitoring method for the electrical line according to the present invention, the current sensor in the steps a and B is a hall current sensor. And B, continuously monitoring the current value in the step A for 7-30 days. And D, if the power utilization unit is judged to be loaded with the abnormal load, starting an alarm through the controller to alarm. And D, if the power utilization unit is judged to be loaded with the abnormal load, uploading monitoring information to the background server through the 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. An abnormal load monitoring method for an electric circuit is characterized by comprising the following steps:
A. continuously monitoring the current value on the L line in a period of time by using a current sensor and a controller, wherein the monitoring frequency is 3000 times per second, and calculating to obtain a maximum current value I and a maximum derivative W of a current change value per microsecond;
B. continuously monitoring the current value S of the power utilization unit during operation through a current sensor and a controller, wherein the monitoring frequency is 3000 times per second, and calculating the derivative V of the current change value per microsecond;
C. comparing the current value S with the maximum current value I through a controller, and if S is larger than or equal to 120% I and W is larger than or equal to V and smaller than or equal to 30A/mu S, judging that the electricity utilization unit is loaded with an abnormal load;
D. and if the abnormal load is judged to be loaded on the power utilization unit, the relay is controlled by the controller to cut off the power supply of the power utilization unit, so that power-off protection is performed.
2. The method of claim 1, wherein the step of monitoring the abnormal load of the electrical line comprises the steps of: and the current sensor in the steps A and B is a Hall current sensor.
3. The method of claim 1, wherein the step of monitoring the abnormal load of the electrical line comprises the steps of: and B, continuously monitoring the current value in the step A for 7-30 days.
4. The method of claim 1, wherein the step of monitoring the abnormal load of the electrical line comprises the steps of: and D, if the power utilization unit is judged to be loaded with the abnormal load, starting an alarm through the controller to alarm.
5. The method of claim 1, wherein the step of monitoring the abnormal load of the electrical line comprises the steps of: and D, if the power utilization unit is judged to be loaded with the abnormal load, uploading monitoring information to the background server through the communication unit on the controller.
6. The method of claim 1, wherein the step of monitoring the abnormal load of the electrical line comprises the steps of: and a relearning starting button is arranged on the controller in the step A.
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| CN201710960271.5A CN107884637B (en) | 2017-10-16 | 2017-10-16 | Abnormal load monitoring method for electric circuit |
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| CN201710960271.5A CN107884637B (en) | 2017-10-16 | 2017-10-16 | Abnormal load monitoring method for electric circuit |
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| CN107884637A CN107884637A (en) | 2018-04-06 |
| CN107884637B true CN107884637B (en) | 2020-10-02 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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| 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 |
| DE112011101326B4 (en) * | 2010-04-14 | 2019-04-04 | Mitsubishi Electric Corporation | Isolation Impairment diagnostic device |
| 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 |
| CN205120867U (en) * | 2015-11-05 | 2016-03-30 | 广西诺思贝电气股份有限公司 | Fault monitoring system with electric loading |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
|---|
| 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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