CN109950860A - Detection of electrical leakage judgment method and leakage protection system suitable for low-voltage network - Google Patents
Detection of electrical leakage judgment method and leakage protection system suitable for low-voltage network Download PDFInfo
- Publication number
- CN109950860A CN109950860A CN201910142203.7A CN201910142203A CN109950860A CN 109950860 A CN109950860 A CN 109950860A CN 201910142203 A CN201910142203 A CN 201910142203A CN 109950860 A CN109950860 A CN 109950860A
- Authority
- CN
- China
- Prior art keywords
- detection
- sampling period
- leakage
- electrical leakage
- current
- Prior art date
- 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.)
- Pending
Links
Abstract
A kind of detection of electrical leakage judgment method provided by the invention obtains first current average of the operating current within first sampling period the following steps are included: persistently sample to the operating current in operating circuit within the first sampling period；Similarly, persistently the operating current in operating circuit is sampled within the second sampling period, obtains the second current average；Calculate and obtain the difference of second current average Yu first current average；Calculate and obtain the ratio of the difference Yu first current average；Judge whether the ratio is greater than a reference value；If the ratio is greater than a reference value, it is judged as electric leakage；Otherwise, it enters to next sampling period and repeats the above steps, to continue to carry out detection of electrical leakage judgement to the operating circuit；Further include a kind of leakage protection system suitable for low-voltage network, using the leakage protection system of this method, can effectively carry out earth leakage protective, and is avoided that electricity consumption caused by due to leaking electricity erroneous judgement influences.
Description
Technical field
The present invention relates to technical field of electric power detection, and in particular to a kind of detection of electrical leakage judgment method and matches suitable for low pressure
The leakage protection system of power grid.
Background technique
Low-voltage network is multi-point and wide-ranging at present, and tour maintenance workload is big, and many low-voltage circuits, equipment, which are in, owes maintenance shape
State, there are more security risk and defect, when low-voltage network when something goes wrong, maintenance load is huge, needs to pass through technology
The operation and management level of means promotion low-voltage network.
Currently, power distribution station line facility often occur the reasons such as electrical installation aging, route trees obstacle cause it is low
Pressure is leaked electricity, and can be impacted to personal safety after low-voltage leakage if electric current is bigger.Person electric shock in order to prevent, people are in distribution
Platform area low-pressure side installs earth leakage protective device, supplies when route generates earth leakage protective device movement disconnection when leakage current is worth human injury
Electricity.Subsequent service personnel investigates and prosecutes failure, restores electricity after reparation.The processing scheme has the following problems:
First is that in the operating circuit of low-voltage network, operating current is in fluctuating change, then electric current under specific circumstances
Momentary fluctuation it is larger, can there are certain drain conditions, but the situation is not fault condition；At this point, conventional electric leakage is protected
Shield device will be present erroneous judgement and disconnect power supply；Second is that user or staff can not obtain event in time after leak current fault occurs
Hinder information, and causes the delay of trouble hunting；The case where said two devices, or unnecessary electricity consumption will have been caused to influence.
Summary of the invention
It is an object of the invention to provide a kind of detection of electrical leakage judgment method in order to overcome the deficiencies of the prior art and be applicable in
In the leakage protection system of low-voltage network.
Detection of electrical leakage judgment method, comprising the following steps:
S1, persistently the operating current in operating circuit is sampled within the first sampling period, obtains multiple first and adopts
Sample value；
S2, it is calculated by each first sampled value, has the operating current in first sampling period to obtain
The first interior current average；
S3, persistently the operating current in operating circuit is sampled within the second sampling period, obtains multiple second and adopts
Sample value；
S4, it is calculated by each second sampled value, has the operating current in second sampling period to obtain
The second interior current average；
S5, calculating and the difference for obtaining second current average Yu first current average；
S6, calculating and the ratio for obtaining the difference Yu first current average；
S7, judge whether the ratio is greater than a reference value；
If the ratio is greater than a reference value, it is judged as electric leakage；Otherwise, on entering to next sampling period and repeating
Step S1 to S7 is stated, to continue to carry out detection of electrical leakage judgement to the operating circuit.
Further, the value range in first sampling period and/or second sampling period is 5~10 power frequencies
Period.
Further, first sampling period and/or second sampling period are 100ms.
Further, first sampling period and second sampling period are continuously uninterrupted.
Further, the value range of a reference value is 8%~12%.
Further, a reference value is 10%.
The invention also includes a kind of leakage protection systems suitable for low-voltage network comprising connect with operating circuit
Detection of electrical leakage judgment module and control unit, the detection of electrical leakage judgment module are connect with described control unit, and the control is single
Member is connected with alarm system；The detection of electrical leakage judgment module is leaked electricity using detection of electrical leakage judgment method as described above
Detection judgement；When being judged as electric leakage, control described control unit described in the external warning note of the alarm system and disconnection
The power supply of operating circuit.
Further, the alarm system includes the buzzer and alarm lamp connecting with described control unit.
Further, the alarm system includes being connected to the network communication module of described control unit and for electric leakage
The background monitoring layer that information is recorded, the network communication module and the connection of background monitoring layer.
Further, the network communication module includes 4G chip module, and the background monitoring layer includes mobile terminal, institute
State 4G chip module and the mobile terminal wireless network connection.
Further, the alarm system is connected with the resetting apparatus for cancelling warning note.
The beneficial effects of the present invention are:
Pass through the application of above-mentioned detection of electrical leakage judgment method；The work electricity of fluctuating change in low-voltage network can definitely be detected
The drain conditions of stream avoid that electric leakage erroneous judgement occurs；And the leakage protection system suitable for low-voltage network of this method is used, energy
Earth leakage protective is effectively carried out, and is avoided that electricity consumption caused by due to leaking electricity erroneous judgement influences.
Detailed description of the invention
Fig. 1 is the flow diagram of detection of electrical leakage judgment method of the invention；
Fig. 2 is the combination diagram of leakage protection system of the invention.
Description of symbols: operating circuit 1, detection of electrical leakage judgment module 2, control unit 3, alarm system 4, buzzer
41, alarm lamp 42, network communication module 5,4g chip module 51, background monitoring layer 6, mobile terminal 61, resetting apparatus 7.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to make technical solution of the present invention, purpose and its advantage more clearly
Explanation is further explained in the present invention.
As shown in Figures 1 and 2, based on the low-voltage network system of existing operation, wherein or be configured with multiple groups distribution line,
A kind of leakage protection system suitable for low-voltage network of the invention can be arranged with multiple terminals to be added to and above-mentioned respectively match
Breaker outgoing line end in electric line route, to realize the disconnection control of its circuit power supply；Or based on newly-built power distribution network system
System carries out standard configuration integration application, can need in response to different clients and have different installation application settings.
Specifically, the leakage protection system includes including the electric leakage connecting with the operating circuit 1 of the low-voltage network
Detection judgment module 2 and control unit 3, described control unit 3 are connect with the breaker of the low-voltage network, the detection of electrical leakage
Judgment module 2 is connect with described control unit 3；Described control unit 3 is connected with alarm system 4；The detection of electrical leakage judges mould
Block 2 carries out detection of electrical leakage judgement to above-mentioned operating circuit 1；When being judged as electric leakage, described control unit 3 is made to control the alarm
The external warning note of system 4 simultaneously controls the power supply that the breaker disconnects the operating circuit 1.
The alarm system 4 includes the buzzer 41 and alarm lamp 42 connecting with described control unit 3；The buzzing
Device 41 and alarm lamp 42 are set to the scene of the low-voltage network；The alarm system 4 further includes being connected to the control
The network communication module 5 of unit 3 processed and for the background monitoring layer 6 that is recorded of electric leakage information, the network communication module 5
With the connection of background monitoring layer 6；The network communication module 5 includes 4g chip module 51, and the background monitoring layer 6 includes moving
Dynamic terminal 61, it is smart phone that application, which may be selected, in the mobile terminal 61；The 4g chip module 51 and the mobile terminal 61
Wireless network connection；The alarm system 4 is connected with the resetting apparatus 7 for cancelling warning note, to the report after warning note
Alert system 4 carries out reset setting, and the leakage protection system is enabled to restore normal detecting state.
When being judged as electric leakage, described control unit 3 controls 41 ring of buzzer and alarm lamp 42 lights, and makes work
Exact leak current fault position can be specified by making personnel, to effectively precisely be overhauled；And simultaneously, it is right by 4g chip module 51
The mobile terminal 61 for managing user sends fault cues information, to enable management user obtain the fault condition of power distribution network in time, into
And effectively establishment officer goes to maintenance；Or further, it is controlled by mobile terminal 61 and combination its terminal app, to scene
Resetting apparatus 7 controlled, meet the reset application demand of leakage protection system.
Specifically, leakage protection system of the invention, which uses, a kind of detection of electrical leakage judgment method, comprising the following steps:
S1, persistently the operating current in operating circuit is sampled within the first sampling period, obtains multiple first and adopts
Sample value；
S2, it is calculated by each first sampled value, has the operating current in first sampling period to obtain
The first interior current average；
S3, persistently the operating current in operating circuit is sampled within the second sampling period, obtains multiple second and adopts
Sample value；
S4, it is calculated by each second sampled value, has the operating current in second sampling period to obtain
The second interior current average；
S5, calculating and the difference for obtaining second current average Yu first current average；
S6, calculating and the ratio for obtaining the difference Yu first current average；
S7, judge whether the ratio is greater than a reference value；
If the ratio is greater than a reference value, it is judged as electric leakage；Otherwise, on entering to next sampling period and repeating
Step S1 to S7 is stated, to continue to carry out detection of electrical leakage judgement to the operating circuit；First sampling period and described second
Sampling period is continuously uninterrupted, to be continued for the sampling of operating current.
The value range in first sampling period and second sampling period may be selected to be 5~10 power frequency weeks
Phase；The value range of a reference value is 8%~12%.
In response to the current fluctuation situation of change of low-voltage network, detection of electrical leakage judgment method of the invention has adaptive special
Property, specifically, the sampling period can be set as 100ms, a reference value 10%；Within the first sampling period, sentence detection of electrical leakage
Disconnected module 2 samples the operating current in operating circuit 1, obtains multiple first sampled values, and each first sampled value is summed,
And numerical value is summed so that arithmetic mean of instantaneous value is calculated according to it, gained arithmetic mean of instantaneous value is first within first sampling period
Current average is assumed to be 1.00A；Then similarly it is calculated within second sampling period into the second sampling period
There is the second current average for 1.05A, the difference of above-mentioned second current average and the first current average is 0.05A, described
The ratio of the difference and first current average is 5%, is less than a reference value 10%, is judged as leakproof；If described
Second current average is 1.11A, then the difference of second current average and the first current average is 0.11A, and gained is poor
The ratio of value and first current average is 11%, is greater than a reference value 10%, is judged as electric leakage；To trigger control
The application of unit 3 meets the earth leakage protective needs of above-mentioned leakage protection system.
The foregoing is merely the preferred embodiment of the present invention not to depart from this for those skilled in the art
Under the premise of the implementation principle of invention, it can still modify to the embodiment, and corresponding modification also should be regarded as this hair
Bright protection scope.
Claims (10)
1. detection of electrical leakage judgment method, which comprises the following steps:
S1, persistently the operating current in operating circuit is sampled within the first sampling period, obtains multiple first sampled values；
S2, it is calculated by each first sampled value, has the operating current within first sampling period to obtain
First current average；
S3, persistently the operating current in operating circuit is sampled within the second sampling period, obtains multiple second sampled values；
S4, it is calculated by each second sampled value, has the operating current within second sampling period to obtain
Second current average；
S5, calculating and the difference for obtaining second current average Yu first current average；
S6, calculating and the ratio for obtaining the difference Yu first current average；
S7, judge whether the ratio is greater than a reference value；
If the ratio is greater than a reference value, it is judged as electric leakage；Otherwise, it enters to next sampling period and repeats above-mentioned step
Rapid S1 to S7, to continue to carry out detection of electrical leakage judgement to the operating circuit.
2. detection of electrical leakage judgment method as described in claim 1, which is characterized in that first sampling period and/or described
The value range in the second sampling period is 5~10 power frequency periods.
3. detection of electrical leakage judgment method as described in claim 1, which is characterized in that first sampling period and/or described
Second sampling period was 100ms.
4. detection of electrical leakage judgment method as described in claim 1, which is characterized in that first sampling period and described second
Sampling period uninterruptedly carries out.
5. detection of electrical leakage judgment method as described in claim 1, which is characterized in that the value range of a reference value is 8%
~12%.
6. detection of electrical leakage judgment method as described in claim 1, which is characterized in that a reference value is 10%.
7. being suitable for the leakage protection system of low-voltage network, which is characterized in that including the detection of electrical leakage being connect with operating circuit
Judgment module and control unit, the detection of electrical leakage judgment module are connect with described control unit, and described control unit is connected with
Alarm system；The detection of electrical leakage judgment module is carried out using the detection of electrical leakage judgment method as described in claim 1 to 6 is any
Detection of electrical leakage judgement；When being judged as electric leakage, so that described control unit is controlled the external warning note of the alarm system and disconnect
The power supply of the operating circuit.
8. leakage protection system as claimed in claim 7, which is characterized in that the alarm system includes and described control unit
The buzzer and alarm lamp of connection.
9. leakage protection system as claimed in claim 7, which is characterized in that the alarm system includes being connected to the control
The network communication module of unit and for the background monitoring layer that is recorded of electric leakage information, the network communication module and backstage
It is connected described in supervisory layers.
10. leakage protection system as claimed in claim 9, which is characterized in that the network communication module includes 4G chip dies
Block, the background monitoring layer includes mobile terminal, the 4G chip module and the mobile terminal wireless network connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910142203.7A CN109950860A (en) | 2019-02-26 | 2019-02-26 | Detection of electrical leakage judgment method and leakage protection system suitable for low-voltage network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910142203.7A CN109950860A (en) | 2019-02-26 | 2019-02-26 | Detection of electrical leakage judgment method and leakage protection system suitable for low-voltage network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109950860A true CN109950860A (en) | 2019-06-28 |
Family
ID=67007060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910142203.7A Pending CN109950860A (en) | 2019-02-26 | 2019-02-26 | Detection of electrical leakage judgment method and leakage protection system suitable for low-voltage network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109950860A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113421802A (en) * | 2021-06-07 | 2021-09-21 | 武汉特试特科技股份有限公司 | Low-voltage intelligent circuit breaker protection method and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1988304A (en) * | 2006-12-11 | 2007-06-27 | 华为技术有限公司 | Method and system for realizing detection protection in far away power supply |
| CN201860088U (en) * | 2010-10-18 | 2011-06-08 | 吕纪文 | Electricity leakage protector |
| CN103176091A (en) * | 2011-12-21 | 2013-06-26 | 深圳富泰宏精密工业有限公司 | System and method for electric leakage detection of electronic device |
| CN105765813A (en) * | 2013-11-13 | 2016-07-13 | Ll株式会社 | Three-phase earth leakage breaker for protecting against electrical shock |
-
2019
- 2019-02-26 CN CN201910142203.7A patent/CN109950860A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1988304A (en) * | 2006-12-11 | 2007-06-27 | 华为技术有限公司 | Method and system for realizing detection protection in far away power supply |
| CN201860088U (en) * | 2010-10-18 | 2011-06-08 | 吕纪文 | Electricity leakage protector |
| CN103176091A (en) * | 2011-12-21 | 2013-06-26 | 深圳富泰宏精密工业有限公司 | System and method for electric leakage detection of electronic device |
| CN105765813A (en) * | 2013-11-13 | 2016-07-13 | Ll株式会社 | Three-phase earth leakage breaker for protecting against electrical shock |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113421802A (en) * | 2021-06-07 | 2021-09-21 | 武汉特试特科技股份有限公司 | Low-voltage intelligent circuit breaker protection method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109709836A (en) | A kind of intelligent lightning monitoring system based on NB-IOT | |
| CN112153331A (en) | Intelligent elevator monitoring system and method based on NB-IOT wireless communication | |
| CN203553628U (en) | Intelligent power box for base station | |
| CN109274177A (en) | Power distribution station safety utilization of electric power monitoring system and monitoring method | |
| CN104931836A (en) | Power grid monitoring and early warning system | |
| CN104967216B (en) | A kind of substation and its monitoring system and its monitoring method | |
| CN105425110A (en) | Quick override trip fault positioning method based on power line carrier technology | |
| CN103197200B (en) | Method and system for rapidly collecting and transmitting fault ranging information of power grid line | |
| CN109950860A (en) | Detection of electrical leakage judgment method and leakage protection system suitable for low-voltage network | |
| CN207440228U (en) | A kind of feeder line fault on-line monitoring system | |
| CN103852685A (en) | Low voltage leakage monitoring method of power distribution platform region | |
| CN116865205B (en) | Wireless breaker fault early warning method and system | |
| CN103219803A (en) | Switch cabinet monitoring system | |
| CN203325159U (en) | Transformer station alarm system | |
| CN105762938A (en) | Distributed photovoltaic distribution network monitoring system and control method thereof | |
| CN106646116A (en) | Trouble shooting and locating method for power distribution network | |
| CN109254223A (en) | Leak electricity short-circuit detection method, open circuit protection equipment, monitoring center, system | |
| CN115313321A (en) | Lightning protection monitoring system and application method thereof | |
| CN211603492U (en) | Monitoring device of direct current system | |
| CN204989873U (en) | Electrical room device is joined in marriage to wisdom | |
| CN204669079U (en) | A kind of safety control for resident's distribution | |
| CN103795141A (en) | DC reclosing switch | |
| CN105978157A (en) | Integrated switch cabinet monitoring terminal | |
| CN208888613U (en) | A kind of Internet of Things protection against electric shock monitor terminal | |
| CN113818021A (en) | Constant potential rectifier with multiple main rectifier units and one standby rectifier unit capable of being automatically switched |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190628 |
|
| RJ01 | Rejection of invention patent application after publication |