CN107607845A - A kind of L PE lines insulation degradation monitoring method - Google Patents
A kind of L PE lines insulation degradation monitoring method Download PDFInfo
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- CN107607845A CN107607845A CN201710960275.3A CN201710960275A CN107607845A CN 107607845 A CN107607845 A CN 107607845A CN 201710960275 A CN201710960275 A CN 201710960275A CN 107607845 A CN107607845 A CN 107607845A
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Abstract
The invention discloses a kind of L PE lines insulation degradation monitoring method, the L PE line insulation degradation monitoring methods comprise the following steps：A, the initial insulation impedance value R between sensor and monitoring control devices L PE lines is passed through；B, by the operation insulation impedance value r between sensor and controller continuous monitoring L PE lines, monitoring frequency is 3000 times per second, and calculates the derivative V of operation insulation impedance value r daily changing value；C, operation insulation impedance value r and initial insulation impedance value R is compared by controller, L PE line insulation ag(e)ings is judged if r ＜ 220K Ω, if r ＜ R, and V absolute value >=1.7K Ω/day then judges that L PE lines occur accelerating insulation degradation；D, if it is determined that L PE lines insulation ag(e)ing occur or accelerate insulation degradation, then relay is disconnected by controller, carries out power-off protection.A kind of L PE line insulation degradation monitoring methods of the present invention by monitoring the insulation impedance of circuit in real time; the insulation ag(e)ing of L PE lines appearance is found in time and is accelerated insulation degradation and is carried out power-off protection; the generation of electric disaster can effectively be exempted from, ensure the property and life security of people.
Description
Technical field
The present invention relates to a kind of Electrical Safety monitoring method, more particularly to a kind of L-PE lines insulation degradation monitoring method.
Background technology
Insulation degradation is that electric leakage, one of major reason of short circuit occurs, usually to people cause huge property loss and
Personal injury.And now lack effective technological means at present and it is monitored in real time, therefore, it is difficult to find the hair of insulation degradation
It is raw, so as to prevent trouble before it happens, it is unfavorable for safety utilization of electric power.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of L-PE lines insulation degradation monitoring method, and it can pass through monitoring
Line insulation impedance, find that the insulation ag(e)ing of L-PE lines and insulation degradation accelerate situation 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 L-PE lines insulation degradation monitoring method, comprises the following steps：A, by between sensor and monitoring control devices L-PE lines
Initial insulation impedance value R；B, the operation insulation impedance value r between sensor and controller continuous monitoring L-PE lines, monitoring are passed through
Frequency is 3000 times per second, and calculates the derivative V of operation insulation impedance value r daily changing value；C, compared by controller
Insulation impedance value r and initial insulation impedance value R is run, judges L-PE line insulation ag(e)ings if r ＜ 220K Ω, if r ＜ R, and V
Absolute value >=1.7K Ω/day then judges that L-PE lines occur accelerating insulation degradation；D, if it is determined that insulation ag(e)ing or exhausted occur in L-PE lines
Edge deteriorates, then disconnects relay by controller, carries out power-off protection.A kind of L-PE lines insulation degradation monitoring method of the present invention is led to
Cross sensor and controller to monitor the initial insulation impedance value between L-PE lines in real time and run insulation impedance value, and it is exhausted to calculate operation
The derivative of the changing value of edge impedance value, you can judge the insulation ag(e)ing of L-PE lines appearance in time and accelerate insulation degradation, and can lead to
Cross power-off protection and ensure Electrical Safety.
Preferably, sensor is Hall current sensor in the step A and B, initial insulation impedance value R and operation are exhausted
Edge impedance value r is calculated by being calculated by R=U/I.
Preferably, if initial insulation impedance value R is less than national normal value in the step A, need to be overhauled immediately
Safeguard.
Preferably, taken daily when the derivative V of operation insulation impedance value r daily changing value is calculated in the step B
Operation insulation impedance value r average calculate, can effectively reduce monitoring error.
Preferably, if it is determined that L-PE lines insulation ag(e)ing occur or accelerate insulation degradation then while pass through in the step D
Controller starts siren and carries out alarm, is easy to timely repair and maintenance.
Preferably, if it is determined that L-PE lines insulation ag(e)ing occur or accelerate insulation degradation then while pass through in the step D
Monitoring information is uploaded to background server by the communication unit on controller, is convenient for remote monitoring and data storage.
Preferably, electrical operation is provided with the controller recovers switch, when electric state is extensive by manual maintenance
It is multiple normal, it can be allowed by switch and electrically resumed operation.
Compared with prior art, a kind of beneficial effect of L-PE lines insulation degradation monitoring method of the present invention：By supervising in real time
The insulation impedance on survey line road, the insulation ag(e)ing of L-PE lines appearance is found in time and accelerates insulation degradation and carries out power-off protection, can
Effectively exempt from the generation of electric disaster, ensure the property and life security of people.
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 L-PE lines insulation degradation monitoring method 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 L-PE lines insulation degradation monitoring method of the present invention, comprise the following steps A, by sensor and
Initial insulation impedance value R between monitoring control devices L-PE lines；B, the fortune between sensor and controller continuous monitoring L-PE lines is passed through
Row insulation impedance value r, monitoring frequency are 3000 times per second, and calculate the derivative of operation insulation impedance value r daily changing value
V；C, operation insulation impedance value r and initial insulation impedance value R is compared by controller, judges that L-PE lines are exhausted if r ＜ 220K Ω
Edge aging, if r ＜ R, and V absolute value >=1.7K Ω/day then judges that L-PE lines occur accelerating insulation degradation；D, if it is determined that L-PE
Line occurs accelerating insulation degradation, then disconnects relay by controller, carries out power-off protection.Wherein, L lines be live wire, PE lines be
Ground protection line.V absolute value >=1.7K Ω/day shows that L-PE line insulation degradations speed is more than natural deterioration speed.It is described
Controller includes single-chip microcomputer, model STC15W408AS.
As shown in figure 1, in a kind of L-PE lines insulation degradation monitoring method of the present invention, sensor is suddenly in the step A and B
That current sensor, initial insulation impedance value R and operation insulation impedance value r are by being calculated.Initially insulated in the step A
If impedance value R is less than national normal value, need to carry out repair and maintenance immediately.Calculate operation insulation impedance value r's in the step B
Daily operation insulation impedance value r average is taken during the derivative V of daily changing value to calculate.If it is determined that L- in the step D
There is insulation ag(e)ing or accelerate insulation degradation then to start siren progress alarm by controller simultaneously in PE lines.In the step D
If it is determined that there is insulation ag(e)ing or accelerate insulation degradation then simultaneously by the communication unit on controller by monitoring information in L-PE lines
It is uploaded to background server.Electrical operation is provided with the controller and recovers switch.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, every spirit in the present invention
With all any modification, equivalent and improvement made within principle etc., it should be included in the scope of the protection.
Claims (7)
1. a kind of L-PE lines insulation degradation monitoring method, it is characterised in that comprise the following steps：
A, the initial insulation impedance value R between sensor and monitoring control devices L-PE lines is passed through；
B, by the operation insulation impedance value r between sensor and controller continuous monitoring L-PE lines, monitoring frequency is per second 3000
It is secondary, and calculate the derivative V of operation insulation impedance value r daily changing value；
C, operation insulation impedance value r and initial insulation impedance value R is compared by controller, judges L-PE lines if r ＜ 220K Ω
Insulation ag(e)ing, if r ＜ R, and V absolute value >=1.7K Ω/day then judges that L-PE lines occur accelerating insulation degradation；
D, if it is determined that L-PE lines insulation ag(e)ing occur or accelerate insulation degradation, then relay is disconnected by controller, powered off
Protection.
A kind of 2. L-PE lines insulation degradation monitoring method according to claim 1, it is characterised in that：In the step A and B
Sensor is Hall current sensor, and initial insulation impedance value R and operation insulation impedance value r are by being calculated.
A kind of 3. L-PE lines insulation degradation monitoring method according to claim 1, it is characterised in that：In the step A just
If the beginning, insulation impedance value R was less than national normal value, need to carry out repair and maintenance immediately.
A kind of 4. L-PE lines insulation degradation monitoring method according to claim 1, it is characterised in that：The step B falls into a trap
Daily operation insulation impedance value r average is taken during the derivative V for calculating operation insulation impedance value r daily changing value to calculate.
A kind of 5. L-PE lines insulation degradation monitoring method according to claim 1, it is characterised in that：If in the step D
Judge that L-PE lines insulation ag(e)ing occur or accelerate insulation degradation then to start siren by controller simultaneously to carry out alarm.
A kind of 6. L-PE lines insulation degradation monitoring method according to claim 1, it is characterised in that：If in the step D
Judge that L-PE lines insulation ag(e)ing occur or accelerate insulation degradation then simultaneously by the communication unit on controller by monitoring information
Reach background server.
A kind of 7. L-PE lines insulation degradation monitoring method according to claim 1, it is characterised in that：Set on the controller
It is equipped with electrical operation and recovers switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710960275.3A CN107607845B (en) | 2017-10-16 | 2017-10-16 | L-PE wire insulation degradation monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710960275.3A CN107607845B (en) | 2017-10-16 | 2017-10-16 | L-PE wire insulation degradation monitoring method |
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| CN107607845A true CN107607845A (en) | 2018-01-19 |
| CN107607845B CN107607845B (en) | 2020-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710960275.3A Active CN107607845B (en) | 2017-10-16 | 2017-10-16 | L-PE wire insulation degradation monitoring method |
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|---|---|---|---|---|
| JPH0919046A (en) * | 1995-04-28 | 1997-01-17 | Mitsubishi Electric Corp | Insulation-degradation diagnostic apparatus |
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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 |
| 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 |
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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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| CN107607845B (en) | 2020-10-02 |
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