CN107276029A - Anti- personal electrical shock circuit breaker control method and system based on Waveform Identification Technology - Google Patents
Anti- personal electrical shock circuit breaker control method and system based on Waveform Identification Technology Download PDFInfo
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- CN107276029A CN107276029A CN201710471249.4A CN201710471249A CN107276029A CN 107276029 A CN107276029 A CN 107276029A CN 201710471249 A CN201710471249 A CN 201710471249A CN 107276029 A CN107276029 A CN 107276029A
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- waveform
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- residual current
- shock
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/12—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to undesired approach to, or touching of, live parts by living beings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/34—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
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- Emergency Protection Circuit Devices (AREA)
- Keying Circuit Devices (AREA)
Abstract
The invention discloses the anti-personal electrical shock circuit breaker control method based on Waveform Identification Technology, comprise the following steps：The residual current for the detecting element collection power circuit being arranged on power circuit is simultaneously sent；Central processing element adds the shock waveform recognition methods that half-wave pointwise intersection compares to residual current handle and output control instruction using all-wave；The executive component being arranged on power circuit receives closure or the cut-out that control instruction realizes power circuit.The present invention also provides the breaker control system that a kind of anti-person based on Waveform Identification Technology gets an electric shock, the Waveform Identification Technology for the method that the present invention is compared using intersecting, failure residual current is analyzed, reach the target of identification shock waveform, possess the gradual residual current not malfunction in residual current threshold value and detect the function of being tripped in time during shock waveform residual current, substantially increase operational percentage and ensured personal safety, it is ensured that the stability of power supply.
Description
Technical field
The present invention relates to electrical stability and field safety are ensured in power system low-voltage network, and in particular to is based on
Anti- personal the electrical shock circuit breaker control method and system of Waveform Identification Technology.
Background technology
With developing rapidly for national economy, the attention degree to personal safety is progressively strengthened, state of the People's Republic of China (PRC)
Family standard GB13955《Aftercurrent action protecting equipment installation and operation》In point out：" remaining electricity is installed in low-voltage distribution system
Stream action protecting device is to prevent directly one of effective measures of contact shock hazard and mediate contact shock hazard, is also to prevent
Electrical equipment grounding failure causes the technical measures of electrical fire and electrical equipment damage accident ".Residual current acting in recent years
Breaker is widely used in low-voltage network, to prevent electric leakage caused by insulation and the accident such as electrical fire have it is important
Effect, at present to the not deployed further investigation of shock waveform identification function and application of personal prevention of electric shock.It is surplus based on this method
Aftercurrent action breaker can provide personal Danger Electric shock risk mediate contact protection, and accident of human electric shock is led and malfunction trip-out rate
Minimize.
The content of the invention
Known in view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that proposing based on waveform
Anti- personal the electrical shock circuit breaker control method and system of other technology, it is adaptable to the low tension that the three-phase and four-line neutral conductor is directly grounded
Net, can get an electric shock, the ground connection of circuit or electrical equipment, overload, short-circuit, over-pressed, under-voltage, phase shortage and the failure such as off zero are carried out to the person
Disjunction.
In order to achieve the above object, the present invention is achieved using following technical scheme：
Anti- personal electrical shock circuit breaker control method based on Waveform Identification Technology, comprises the following steps：
The residual current for the detecting element collection power circuit being arranged on power circuit is simultaneously sent；
Central processing element using all-wave add half-wave pointwise intersect the shock waveform recognition methods compared to residual current at
Manage and output control instruction；
The executive component being arranged on power circuit receives closure or the cut-out that control instruction realizes power circuit.
Further, the detecting element is residual current transformer.
Further, the central processing element includes amplifier, comparator, primary processor and electrical apparatus release, the residue
The output end connection amplifier of current transformer, the output end comparator of the amplifier, the output end connection of the comparator
Primary processor, the output end connection electrical apparatus release of the primary processor, the electrical apparatus release is connected with performing switch.
Further, the all-wave adds half-wave pointwise to intersect the shock waveform recognition methods compared, and comprises the following steps：
Step one, residual current data are analyzed in real time, and two buffer areas are set, BuffA and BuffB is defined as,
Step 2, calculates the mutation rate δ of data in BuffA, by its modulus value QUOTE With mutation rate threshold value QUOTE It is compared, works as QUOTE More than QUOTE When, the 3rd step is transferred to, this waveform is otherwise exited and differentiates stream
Journey；
Step 3, according to δ polarity, from shock waveform database, selects the specific waveforms data set QUOTE of identical polar , carry out calculating coefficient correlation QUOTE one by one , extract waveform correlation coefficient and exceed threshold value QUOTE
Wave data reformulate a waveform dataset QUOTE , work as QUOTE Medium wave figurate number mesh
For 0 when, show be not present similar waveform, exit this waveform differentiate flow；
Step 4, calculates the waveform same waveform data set QUOTE in BuffB Relative coefficient QUOTE , work as QUOTE More than threshold value QUOTE When, Judging fault is electric shock, starts follow-up protection act, this subwave
Shape differentiates that flow terminates.
Further, BuffA data length is dimensioned to the data length of 1 cycle, BuffB according to sample rate f s
Data length the data lengths of 1.5 cycles is dimensioned to according to sample rate f s, BuffA and BuffB buffer areas are according to number
According to throughput ds real-time updates.
The present invention also provides the breaker control system that a kind of anti-person based on Waveform Identification Technology gets an electric shock, including：If
Put the residual current transformer on power circuit, intermediate processing element, the execution being arranged on power circuit switch and test
Element；The output end connection intermediate processing element of the residual current transformer, the output end connection of the intermediate processing element
Switch is performed, the intermediate processing element includes amplifier, comparator, primary processor and electrical apparatus release, the residual current mutual inductance
The output end connection amplifier of device, the output end comparator of the amplifier, the output end connection primary processor of the comparator,
The output end connection electrical apparatus release of the primary processor, the electrical apparatus release is connected with performing switch.
Further, the primary processor uses the CPU processor of the NUC100RD2DN models of ARM-MO series.
Further, the primary processor is also connected with display unit and RS485 communication units.
Present invention has the advantages that：
The present invention refers to the environment that TN, TT mode of connection are used in low-voltage network for the residual current on power circuit
Under, because the leaky that dielectric level reduction or mediate contact are caused.The waveform recognition skill of the method compared using intersecting
Art, is analyzed failure residual current, reaches the target of identification shock waveform.With the means of signal disposal and analysis, knot
Shock waveform database is closed, global alignment is carried out to technical indicators such as the correlations, mutation rate, polarity of fault waveform.Middle
The collection signal that element receives residual current transformer is managed, by comparing amplification output to primary processor, primary processor passes through complete
The shock waveform recognition methods that ripple adds half-wave pointwise intersection to compare determines whether shock waveform, and by controlling electrical apparatus release to holding
Units are controlled.Possess the gradual residual current not malfunction in residual current threshold value and detect shock waveform residue
The function of being tripped in time during electric current, substantially increases operational percentage and has ensured personal safety, it is ensured that the stability of power supply.
Brief description of the drawings
Fig. 1 is the anti-personal electrical shock circuit breaker control method flow chart proposed by the present invention based on Waveform Identification Technology；
Fig. 2 is the central processing element structure chart proposed by the present invention；
Fig. 3 is the anti-personal electrical shock circuit breaker scheme of installation based on Waveform Identification Technology proposed by the present invention；
Fig. 4 is the anti-personal electrical shock circuit breaker equivalent circuit diagram based on Waveform Identification Technology proposed by the present invention；
Fig. 5 is that the all-wave proposed by the present invention adds half-wave pointwise to intersect the shock waveform recognition methods flow chart compared；
Fig. 6 is the anti-personal electrical shock circuit breaker control system architecture figure based on Waveform Identification Technology proposed by the present invention.
Embodiment
Below in conjunction with the accompanying drawings and embodiment describes the specific embodiment of the invention：
By furtheing investigate human body（Animal）Impedance operator during electric shock, when getting an electric shock, flows through the shock current conduct of human body
One special mutation increment is imported into residual current.According to this principle, the design proposes all-wave plus half-wave pointwise intersects ratio
Compared with shock waveform recognition methods, shock waveform is isolated from residual current.The optimization processing being engineered to algorithm,
Possess the gradual residual current not malfunction in residual current threshold value and tripped in time when detecting shock waveform residual current
Function, substantially increase and operational percentage and ensured personal safety, it is ensured that the stability of power supply.
Fig. 1 is the anti-personal electrical shock circuit breaker control method flow chart proposed by the present invention based on Waveform Identification Technology；
As shown in figure 1, the anti-personal electrical shock circuit breaker control method based on Waveform Identification Technology, comprises the following steps：
Step 101, the residual current for the detecting element collection power circuit being arranged on power circuit is simultaneously sent；
Step 102, central processing element adds half-wave pointwise to intersect the shock waveform recognition methods compared to remaining electricity using all-wave
Stream progress is handled and output control instruction；
Step 103, the executive component being arranged on power circuit receives closure or the cut-out that control instruction realizes power circuit.
In the embodiment of the present invention, refer to connect using TN, TT in low-voltage network for the residual current on power circuit
In the environment of line mode, because the leaky that dielectric level reduction or mediate contact are caused.The method compared using intersection
Waveform Identification Technology, failure residual current is analyzed, reach identification shock waveform target.With signal transacting with dividing
The means of analysis, with reference to shock waveform database, are integrated to technical indicators such as the correlations, mutation rate, polarity of fault waveform
Compare.Intermediate processing element receives the collection signal of residual current transformer, by comparing amplification output to primary processor, main place
The shock waveform recognition methods that reason device adds half-wave pointwise intersection to compare by all-wave determines whether shock waveform, and passes through control
Electrical apparatus release is controlled to executive component.
Referring to Fig. 2 to Fig. 4, wherein Fig. 2 is the central processing element structure chart proposed by the present invention；Fig. 3 is the present invention
The anti-personal electrical shock circuit breaker scheme of installation based on Waveform Identification Technology proposed；Fig. 4 is proposed by the present invention described
Anti- personal electrical shock circuit breaker equivalent circuit diagram based on Waveform Identification Technology；
Such as Fig. 2 to Fig. 4, detecting element is residual current transformer.Central processing element includes amplifier, comparator, main process task
Device and electrical apparatus release, the output end connection amplifier of the residual current transformer, the output end comparator of the amplifier are described
The output end connection primary processor of comparator, the output end connection electrical apparatus release of the primary processor, the electrical apparatus release is opened with execution
Connection connects.
It is that the all-wave proposed by the present invention plus half-wave pointwise intersect the shock waveform identification side compared referring to Fig. 5
Method flow chart；
As shown in figure 5, all-wave adds half-wave pointwise to intersect the shock waveform recognition methods compared, comprise the following steps：
Analysis residual current data, set two buffer areas, are defined as BuffA and BuffB in real time,
Calculate the mutation rate δ of data in BuffA（di/dt）, by its modulus value QUOTE With mutation rate threshold value QUOTE It is compared, works as QUOTE More than QUOTE When, the 3rd step is transferred to, this waveform is otherwise exited and differentiates stream
Journey；
According to δ polarity, from shock waveform database, the specific waveforms data set QUOTE of identical polar is selected
, carry out calculating coefficient correlation QUOTE one by one , extract waveform correlation coefficient and exceed threshold value QUOTE Waveform number
According to one waveform dataset QUOTE of reformulation , work as QUOTE When medium wave figurate number mesh is 0, table
It is bright that similar waveform is not present, exit this waveform and differentiate flow；
Calculate the waveform same waveform data set QUOTE in BuffB Relative coefficient QUOTE , when
QUOTE More than threshold value QUOTE When, Judging fault is electric shock, starts follow-up protection act, and this waveform differentiates
Flow terminates.
Further, BuffA data length is dimensioned to the data length of 1 cycle, BuffB according to sample rate f s
Data length the data lengths of 1.5 cycles is dimensioned to according to sample rate f s, BuffA and BuffB buffer areas are according to number
According to throughput ds real-time updates.
In this flow, primary processor analyzes residual current data in real time, sets two buffer areas, be defined as BuffA and
BuffB, BuffA data length are dimensioned to 1 cycle according to sample rate f s（All-wave）Data length, BuffB number
1.5 cycles are dimensioned to according to sample rate f s according to length（All-wave+half-wave）Data length, BuffA and BuffB buffer areas
According to data throughput ds real-time updates；Calculate the mutation rate δ of data in BuffA（di/dt）, by its modulus value QUOTE
With mutation rate threshold value QUOTE It is compared, works as QUOTE More than QUOTE When, into next step meter
In point counting analysis, otherwise exit this waveform and differentiate flow；
According to δ polarity, from shock waveform database, the specific waveforms data set QUOTE of identical polar is selected
, carry out calculating coefficient correlation QUOTE one by one , extract waveform correlation coefficient and exceed threshold value QUOTE Waveform number
According to one waveform dataset QUOTE of reformulation , work as QUOTE When medium wave figurate number mesh is 0, table
It is bright that similar waveform is not present, exit this waveform and differentiate flow；
Calculate the waveform same waveform data set QUOTE in BuffB Relative coefficient QUOTE , when
QUOTE More than threshold value QUOTE When, Judging fault is electric shock, starts follow-up protection act, and this waveform differentiates
Flow terminates.
It is the anti-personal electrical shock circuit breaker control system based on Waveform Identification Technology proposed by the present invention referring to Fig. 6
Structure chart.
As shown in fig. 6, the breaker control system that the anti-person based on Waveform Identification Technology gets an electric shock, including：It is arranged on electricity
Residual current transformer, intermediate processing element on line of force road, the execution switch and experiment component being arranged on power circuit；Institute
The output end connection intermediate processing element of residual current transformer is stated, the output end connection execution of the intermediate processing element is opened
Close, the intermediate processing element include amplifier, comparator, primary processor and electrical apparatus release, the residual current transformer it is defeated
Go out end connection amplifier, the output end comparator of the amplifier, the output end connection primary processor of the comparator, the master
The output end connection electrical apparatus release of processor, the electrical apparatus release is connected with performing switch.
In the embodiment of the present invention, residual current action breaker is set on power circuit, when protected power circuit
Generation is leaked electricity or during someone's electric shock, due to the presence of residual current, by the phasor of each phase current of TA primary sides and is no longer equal to
Zero, generate residual current so that occur in that alternating flux in TA iron cores, under alternating flux effect, TA second siding rings are just
There is induced electromotive force generation, this residual current signal carries out current signal amplification through the amplifier in intermediate processing element, then
Compare by comparator, when reaching predetermined value, main switch shunt release coil TL is powered, driving main switch GF is jumped automatically
Lock, disengagement failure circuit, so as to realize protection.
Further, the primary processor uses the CPU processor of the NUC100RD2DN models of ARM-MO series.Pass through
The current signal of residual current transformer monitoring is received, it is amplified to add half-wave pointwise intersection to compare by internal all-wave more afterwards
Shock waveform recognition methods, shock waveform is isolated from residual current, judge whether occur electric leakage or get an electric shock, control thread off
Device is acted, and cut-out is arranged on the switch that performs on power circuit, power circuit power-off, it is ensured that the security of power supply.
Further, the primary processor is also connected with display unit and RS485 communication units.
Display unit can be coordinated using numeral method and indicator lamp display, can be to the three-phase voltage on power circuit
Shown with three-phase current, alarm, failure etc. can also be set to indicate, while data setting can also be carried out and inquiry refers to
Show.RS485 communication units carry out intelligent communication management using MODBUS stipulations.
The preferred embodiment for the present invention is explained in detail above in conjunction with accompanying drawing, but the invention is not restricted to above-mentioned implementation
Mode, can also be on the premise of present inventive concept not be departed from the knowledge that those of ordinary skill in the art possess
Make a variety of changes, these changes are related to correlation technique well-known to those skilled in the art, and these both fall within patent of the present invention
Protection domain.
Many other changes and remodeling can be made by not departing from the spirit and scope of the present invention.It should be appreciated that the present invention is not
It is limited to specific embodiment, the scope of the present invention is defined by the following claims.
Claims (8)
1. the anti-personal electrical shock circuit breaker control method based on Waveform Identification Technology, it is characterised in that comprise the following steps：
The residual current for the detecting element collection power circuit being arranged on power circuit is simultaneously sent；
Central processing element using all-wave add half-wave pointwise intersect the shock waveform recognition methods compared to residual current at
Manage and output control instruction；
The executive component being arranged on power circuit receives closure or the cut-out that control instruction realizes power circuit.
2. the anti-personal electrical shock circuit breaker control method according to claim 1 based on Waveform Identification Technology, its feature exists
In the detecting element is residual current transformer.
3. the anti-personal electrical shock circuit breaker control method according to claim 1 based on Waveform Identification Technology, its feature exists
Include amplifier, comparator, primary processor and electrical apparatus release in, the central processing element, the residual current transformer it is defeated
Go out end connection amplifier, the output end comparator of the amplifier, the output end connection primary processor of the comparator, the master
The output end connection electrical apparatus release of processor, the electrical apparatus release is connected with performing switch.
4. the anti-personal electrical shock circuit breaker control method according to claim 1 based on Waveform Identification Technology, its feature exists
In the all-wave adds half-wave pointwise to intersect the shock waveform recognition methods compared, and comprises the following steps：
Step one, residual current data are analyzed in real time, and two buffer areas are set, BuffA and BuffB is defined as,
Step 2, calculates the mutation rate δ of data in BuffA, by its modulus value QUOTE With mutation rate threshold value QUOTE It is compared, works as QUOTE More than QUOTE When, the 3rd step is transferred to, the differentiation of this waveform is otherwise exited
Flow；
Step 3, according to δ polarity, from shock waveform database, selects the specific waveforms data set QUOTE of identical polar , carry out calculating coefficient correlation QUOTE one by one , extract waveform correlation coefficient and exceed threshold value QUOTE
Wave data reformulate a waveform dataset QUOTE , work as QUOTE Medium wave figurate number
When mesh is 0, show that similar waveform is not present, exit this waveform and differentiate flow；
Step 4, calculates the waveform same waveform data set QUOTE in BuffB Relative coefficient QUOTE , work as QUOTE More than threshold value QUOTE When, Judging fault is electric shock, starts follow-up protection act, this
Waveform differentiates that flow terminates.
5. the anti-personal electrical shock circuit breaker control method according to claim 4 based on Waveform Identification Technology, its feature exists
Be dimensioned to the data length of 1 cycle according to sample rate f s in, BuffA data length, BuffB data length according to
Sample rate f s is dimensioned to the data length of 1.5 cycles, BuffA and BuffB buffer areas are real-time according to data throughput ds
Update.
6. the anti-personal electrical shock circuit breaker control system based on Waveform Identification Technology, including：It is arranged on the residue on power circuit
Current transformer, intermediate processing element, the execution switch being arranged on power circuit and experiment component；The residual current mutual inductance
The output end connection intermediate processing element of device, the output end connection of the intermediate processing element performs switch, the intermediate treatment
Element includes amplifier, comparator, primary processor and electrical apparatus release, and the output end of the residual current transformer connects amplifier,
The output end comparator of the amplifier, the output end connection primary processor of the comparator, the output end of the primary processor
Electrical apparatus release is connected, the electrical apparatus release is connected with performing switch.
7. the anti-personal electrical shock circuit breaker control system according to claim 6 based on Waveform Identification Technology, its feature exists
In the primary processor uses the CPU processor of the NUC100RD2DN models of ARM-MO series.
8. the anti-personal electrical shock circuit breaker control system according to claim 6 based on Waveform Identification Technology, its feature exists
In the primary processor is also connected with display unit and RS485 communication units.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710471249.4A CN107276029B (en) | 2017-06-20 | 2017-06-20 | Anti- personal electrical shock circuit breaker control method and system based on Waveform Identification Technology |
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| CN107276029B CN107276029B (en) | 2019-04-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108695820A (en) * | 2018-07-21 | 2018-10-23 | 朱德锋 | Anti-reverse electrical ground protection system |
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|---|---|---|---|---|
| CN1236212A (en) * | 1999-05-16 | 1999-11-24 | 张宝明 | Method and device for separating animal's electric shock signal |
| CN102684141A (en) * | 2012-04-28 | 2012-09-19 | 中国农业大学 | Shock current identifying method and aftercurrent protecting device |
| CN203225510U (en) * | 2013-04-22 | 2013-10-02 | 肖友盛 | Residual-current circuit breaker with self-checking function |
| CN104377676A (en) * | 2014-10-31 | 2015-02-25 | 国家电网公司 | PT intelligent resonance elimination device for power distribution network |
| CN205429686U (en) * | 2015-04-24 | 2016-08-03 | 安徽南瑞继远电网技术有限公司 | Intelligence earth -leakage protector treatment circuit based on ARM platform |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1236212A (en) * | 1999-05-16 | 1999-11-24 | 张宝明 | Method and device for separating animal's electric shock signal |
| CN102684141A (en) * | 2012-04-28 | 2012-09-19 | 中国农业大学 | Shock current identifying method and aftercurrent protecting device |
| CN203225510U (en) * | 2013-04-22 | 2013-10-02 | 肖友盛 | Residual-current circuit breaker with self-checking function |
| CN104377676A (en) * | 2014-10-31 | 2015-02-25 | 国家电网公司 | PT intelligent resonance elimination device for power distribution network |
| CN205429686U (en) * | 2015-04-24 | 2016-08-03 | 安徽南瑞继远电网技术有限公司 | Intelligence earth -leakage protector treatment circuit based on ARM platform |
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| CN108695820A (en) * | 2018-07-21 | 2018-10-23 | 朱德锋 | Anti-reverse electrical ground protection system |
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