CN107884637A - A kind of improper load monitoring method of electric wiring - Google Patents
A kind of improper load monitoring method of electric wiring Download PDFInfo
- Publication number
- CN107884637A CN107884637A CN201710960271.5A CN201710960271A CN107884637A CN 107884637 A CN107884637 A CN 107884637A CN 201710960271 A CN201710960271 A CN 201710960271A CN 107884637 A CN107884637 A CN 107884637A
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- China
- Prior art keywords
- power unit
- improper load
- controller
- current value
- electric wiring
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
-
- 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
Abstract
The invention discloses a kind of improper load monitoring method of electric wiring, the monitoring method comprises the following steps：A, by current sensor and controller continuous monitoring power unit, the current value on interior L lines, monitoring frequency are 3000 times per second for a period of time, and the maximum current value I and maximum derivative W per microsecond current variation value is calculated；B, continue to monitor current value S when power unit is run by current sensor and controller, monitoring frequency is 3000 times per second, and calculates the derivative V per microsecond current variation value；C, current value S and maximum current value I are compared by controller, if S >=120%I, and W≤V≤30A/ μ s then judge that power unit is loaded with improper load；D, if it is determined that power unit is loaded with improper load, then by controller control relay, the power supply of power unit is cut off, carries out power-off protection.Current conditions of the invention by monitoring power unit in real time, the increase of improper load can be found in time.
Description
Technical field
The present invention relates to a kind of Electrical Safety monitoring method, more particularly to a kind of improper load monitoring side of electric wiring
Method.
Background technology
Improper load is to cause one of electric wiring overload, important origin cause of formation of electrical fire, is usually caused to people huge
Big property loss.And now lack the load improper to electric wiring of effective means at present and monitored in real time, so as to cause
It can neither prevent trouble before it happens, can not also realize safety utilization of electric power management.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of improper load monitoring method of electric wiring, and it can pass through
The line current situation of power unit is monitored, finds improper loading condition in time, in order to which Electrical Safety is supervised.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme that：
A kind of improper load monitoring method of electric wiring, comprises the following steps：A, it is continuous by current sensor and controller
The power unit current value on interior L lines for a period of time is monitored, monitoring frequency is 3000 times per second, and maximum current value is calculated
The I and maximum derivative W per microsecond current variation value；When B, continuing to monitor power unit operation by current sensor and controller
Current value S, monitoring frequency is 3000 times per second, and calculates the derivative V per microsecond current variation value；C, compared by controller
Current value S and maximum current value I, if S >=120%I, and W≤V≤30A/ μ s then judge that power unit is loaded with improper load；
D, if it is determined that power unit is loaded with improper load, then by controller control relay, the power supply of power unit is cut off, is entered
Row power-off protection.A kind of improper load monitoring method of electric wiring of the present invention passes through current sensor and controller study statistics
Maximum current value in the power unit certain time section, then the current conditions of monitoring power unit in real time, dash forward if meeting electric current
So become the certain limit of maximum current value big and beyond study and to accelerate to increase, be then determined as that increase has improper load,
Now then starting relay, the power supply of power unit is cut off, carry out power-off protection.
Preferably, current sensor is Hall current sensor in the step A and B.
Preferably, in the step A continuous monitoring current value when a length of 7-30 days.
Preferably, if it is determined that power unit is loaded with improper load then while opened by controller in the step D
Dynamic siren carries out alarm, is easy to timely repair and maintenance.
Preferably, if it is determined that power unit is loaded with improper load then simultaneously by controller in the step D
Communication unit monitoring information is uploaded to background server, be convenient for remote monitoring and data storage.
Start button is relearned preferably, being provided with the step A on controller, is easy to electricity consumption on electric wiring
Restart step A when equipment varies widely, that is, relearn.
Compared with prior art, a kind of beneficial effect of the improper load monitoring method of electric wiring of the present invention：Pass through reality
When monitor power unit current conditions, find the increase of improper load in time, and rapidly be controlled processing and information hair
Cloth, the safety utilization of electric power of power unit was both can ensure that, and be also convenient for electrical equipment management of the administrative staff to power unit, especially suitable for learning
The power utilization environments such as raw dormitory.
Brief description of the drawings
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is a kind of schematic diagram of the improper load monitoring method of electric wiring of the present invention.
Embodiment
All features disclosed in this specification, or disclosed all methods or during the step of, except mutually exclusive
Feature and/or step beyond, can combine in any way.
Any feature disclosed in this specification, unless specifically stated otherwise, can be equivalent by other or with similar purpose
Alternative features are replaced.I.e., unless specifically stated otherwise, each feature is an example in a series of equivalent or similar characteristics
.
As shown in figure 1, a kind of improper load monitoring method of electric wiring of the present invention, comprises the following steps：A, electricity is passed through
The current value on interior L lines, monitoring frequency are 3000 times per second for a period of time for flow sensor and controller continuous monitoring power unit,
And the maximum current value I and maximum derivative W per microsecond current variation value is calculated, the process can be referred to as learning process；B、
Continuing to monitor current value S when power unit is run by current sensor and controller, monitoring frequency is 3000 times per second, and
Calculate the derivative V per microsecond current variation value；C, current value S and maximum current value I are compared by controller, if S >=120%I,
And W≤V≤30A/ μ s then judge that power unit is loaded with improper load；D, if it is determined that power unit is loaded with improper bear
Carry, then by controller control relay, cut off the power supply of power unit, carry out power-off protection.Wherein, L lines are live wire.It is described
Controller includes single-chip microcomputer, model STC15W408AS.
As shown in figure 1, in a kind of improper load monitoring method of electric wiring of the present invention, electric current passes in the step A and B
Sensor is Hall current sensor.In the step A continuous monitoring current value when a length of 7-30 days.If sentence in the step D
Determine power unit and be loaded with improper load then simultaneously by controller startup siren progress alarm.If sentence in the step D
Determine power unit to be loaded with improper load then while monitoring information is uploaded into backstage clothes by the communication unit on controller
Business device.It is provided with the step A on controller and relearns start button.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, every the present invention's
All any modification, equivalent and improvement made within spirit and principle etc., should be included in the scope of the protection.
Claims (6)
- A kind of 1. improper load monitoring method of electric wiring, it is characterised in that comprise the following steps：A, current sensor and controller continuous monitoring the power unit current value on interior L lines for a period of time, monitoring frequency are passed through For 3000 times per second, and the maximum current value I and maximum derivative W per microsecond current variation value is calculated；B, continue to monitor current value S when power unit is run by current sensor and controller, monitoring frequency is per second 3000 times, and calculate the derivative V per microsecond current variation value；C, current value S and maximum current value I are compared by controller, if S >=120%I, and W≤V≤30A/ μ s then judge electricity consumption Unit is loaded with improper load；D, if it is determined that power unit is loaded with improper load, then by controller control relay, the confession of power unit is cut off Electricity, carry out power-off protection.
- 2. a kind of improper load monitoring method of electric wiring according to claim 1, it is characterised in that：The step A It is Hall current sensor with current sensor in B.
- 3. a kind of improper load monitoring method of electric wiring according to claim 1, it is characterised in that：The step A Middle continuous monitoring current value when a length of 7-30 days.
- 4. a kind of improper load monitoring method of electric wiring according to claim 1, it is characterised in that：The step D In if it is determined that power unit be loaded with it is improper load then simultaneously by controller start siren carry out alarm.
- 5. a kind of improper load monitoring method of electric wiring according to claim 1, it is characterised in that：The step D In if it is determined that power unit is loaded with improper load then while is uploaded to monitoring information by the communication unit on controller Background server.
- 6. a kind of improper load monitoring method of electric wiring according to claim 1, it is characterised in that：The step A It is provided with middle controller and relearns start button.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710960271.5A CN107884637B (en) | 2017-10-16 | 2017-10-16 | Abnormal load monitoring method for electric circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710960271.5A CN107884637B (en) | 2017-10-16 | 2017-10-16 | Abnormal load monitoring method for electric circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107884637A true CN107884637A (en) | 2018-04-06 |
| CN107884637B CN107884637B (en) | 2020-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710960271.5A Active CN107884637B (en) | 2017-10-16 | 2017-10-16 | Abnormal load monitoring method for electric circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN107884637B (en) |
Citations (10)
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|---|---|---|---|---|
| JPH0919046A (en) * | 1995-04-28 | 1997-01-17 | Mitsubishi Electric Corp | Insulation-degradation diagnostic apparatus |
| CN1262802A (en) * | 1997-07-10 | 2000-08-09 | 西门子公司 | Method and system for detecting shot-circuit in low-voltage mains |
| CN101329381A (en) * | 2008-07-28 | 2008-12-24 | 庞元俊 | Method for detecting short circuit fault with current change rate |
| CN102812369A (en) * | 2010-04-14 | 2012-12-05 | 三菱电机株式会社 | Insulation deterioration diagnosis device |
| CN102854428A (en) * | 2011-06-28 | 2013-01-02 | 西门子公司 | Method and device for short circuit detection |
| CN103278711A (en) * | 2013-04-28 | 2013-09-04 | 福州大学 | Method for early detecting and identifying short-circuit faults and series arc faults |
| CN103733080A (en) * | 2011-08-01 | 2014-04-16 | 维也纳技术大学 | Method and device for detecting a deterioration in the state of an insulation in an operating electric machine |
| 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 |
| CN105572544A (en) * | 2016-02-01 | 2016-05-11 | 河南理工大学 | Current change rate-based coal mine power grid short-circuiting fault quick judging device and method |
| 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 |
-
2017
- 2017-10-16 CN CN201710960271.5A patent/CN107884637B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0919046A (en) * | 1995-04-28 | 1997-01-17 | Mitsubishi Electric Corp | Insulation-degradation diagnostic apparatus |
| CN1262802A (en) * | 1997-07-10 | 2000-08-09 | 西门子公司 | Method and system for detecting shot-circuit in low-voltage mains |
| CN101329381A (en) * | 2008-07-28 | 2008-12-24 | 庞元俊 | Method for detecting short circuit fault with current change rate |
| CN102812369A (en) * | 2010-04-14 | 2012-12-05 | 三菱电机株式会社 | Insulation deterioration diagnosis device |
| CN102854428A (en) * | 2011-06-28 | 2013-01-02 | 西门子公司 | Method and device for short circuit detection |
| CN103733080A (en) * | 2011-08-01 | 2014-04-16 | 维也纳技术大学 | Method and device for detecting a deterioration in the state of an insulation in an operating electric machine |
| CN103278711A (en) * | 2013-04-28 | 2013-09-04 | 福州大学 | Method for early detecting and identifying short-circuit faults and series arc faults |
| 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 |
| 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 |
| CN105572544A (en) * | 2016-02-01 | 2016-05-11 | 河南理工大学 | Current change rate-based coal mine power grid short-circuiting fault quick judging device and method |
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| Title |
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| 王云熙: "电力设备绝缘劣化诊断法", 《河北电力技术》 * |
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| CN107884637B (en) | 2020-10-02 |
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