CN107276029B - 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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- CN107276029B CN107276029B CN201710471249.4A CN201710471249A CN107276029B CN 107276029 B CN107276029 B CN 107276029B CN 201710471249 A CN201710471249 A CN 201710471249A CN 107276029 B CN107276029 B CN 107276029B
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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
-
- 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 methods based on Waveform Identification Technology, comprising the following steps: the residual current for the detecting element acquisition power circuit being arranged on power circuit is simultaneously sent；Central processing element uses all-wave that half-wave is added to intersect the shock waveform recognition methods compared point by point and is handled residual current and export control instruction；The executive component being arranged on power circuit receives closure or cutting that control instruction realizes power circuit.The breaker control system for the anti-person electric shock based on Waveform Identification Technology that the present invention also provides a kind of, the present invention is using the Waveform Identification Technology for intersecting the method compared, failure residual current is analyzed, reach the target of identification shock waveform, the function of having the gradual residual current not malfunction in residual current threshold value and trip in time when detecting shock waveform residual current, it substantially increases operational percentage and has ensured personal safety, ensure that the stability of power supply.
Description
Technical field
The present invention relates to electrical stability and field safety are ensured in electric system low-voltage network, and in particular to is based on
The anti-personal electrical shock circuit breaker control method and system of Waveform Identification Technology.
Background technique
With the rapid development of the national economy, the attention degree of personal safety is gradually reinforced, state, the People's Republic of China (PRC)
It is pointed out in family standard GB13955 " aftercurrent action protecting equipment installation and operation ": " installing remaining electricity in low-voltage distribution system
Flowing action protecting device is to prevent from directly contacting one of shock hazard and the effective measures of mediate contact shock hazard, and 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, is had to the accidents such as electric leakage and electrical fire caused by insulation that prevent important
Effect, at present to the further investigation undeployed 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
It minimizes.
Summary 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
The anti-personal electrical shock circuit breaker control method and system of other technology, the low tension being directly grounded suitable for the three-phase and four-line neutral conductor
Net can carry out person electric shock, the ground connection of route or electrical equipment, overload, short circuit, over-voltage, under-voltage, phase shortage and the failures such as off zero
Disjunction.
In order to achieve the above object, the present invention is achieved by the following scheme:
Anti- personal electrical shock circuit breaker control method based on Waveform Identification Technology, comprising the following steps:
The residual current for the detecting element acquisition power circuit being arranged on power circuit is simultaneously sent；
Central processing element using all-wave add half-wave intersect point by point the shock waveform recognition methods compared to residual current into
Row handles and exports control instruction；
The executive component being arranged on power circuit receives closure or cutting 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 buckle releaser, the residue
The output end of current transformer connects amplifier, the output end comparator of the amplifier, the output end connection of the comparator
Primary processor, the output end of the primary processor connect buckle releaser, the buckle releaser and execution switch connection.
Further, the all-wave adds half-wave to intersect the shock waveform recognition methods compared point by point, comprising the following steps:
Step 1 analyzes residual current data in real time, two buffer areas is arranged, are defined as BuffA and BuffB,
Step 2 calculates the mutation rate δ of data in BuffA, by its modulus value | δ | with mutation rate threshold value δsIt is compared, when |
δ | it is greater than δsWhen, it is transferred to third step, this waveform is otherwise exited and differentiates process；
Step 3 from shock waveform database, selects the specific waveforms data set of identical polar according to the polarity of δ
{ W } carries out calculating correlation coefficient ρ one by onexy, extracting waveform correlation coefficient is more than threshold valueWave data reformulate a wave
Graphic data collection { Wx } shows to exit this waveform there is no similar waveform and differentiate process when { Wx } medium wave figurate number mesh is 0；
Step 4 calculates waveform same waveform data set { Wx } the relative coefficient ρ in BuffBxy, work as ρxyGreater than threshold value
When, Judging fault is electric shock, starts subsequent protection act, this waveform differentiates that process terminates.
Further, the data length of BuffA 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 area is according to number
According to throughput ds real-time update.
The breaker control system for the anti-person electric shock based on Waveform Identification Technology that the present invention also provides a kind of, comprising: set
Set the residual current transformer on power circuit, intermediate processing element, the execution switch being arranged on power circuit and experiment
Element；The output end of the residual current transformer connects intermediate processing element, the output end connection of the intermediate processing element
Switch is executed, the intermediate processing element includes amplifier, comparator, primary processor and buckle releaser, the residual current mutual inductance
The output end of device connects amplifier, and the output end of the output end comparator of the amplifier, the comparator connects primary processor,
The output end of the primary processor connects buckle releaser, the buckle releaser and execution switch connection.
Further, the primary processor uses the CPU processor of the NUC100RD2DN model of ARM-MO series.
Further, the primary processor is also connected with display unit and RS485 communication unit.
The medicine have the advantages that
The present invention refers to the residual current on power circuit on the ring that TN, TT mode of connection are used in low-voltage network
Under border, because of leaky caused by dielectric level reduction or mediate contact.Using the waveform recognition for intersecting the method compared
Technology analyzes failure residual current, reaches the target of identification shock waveform.With the means of signal disposal and analysis,
In conjunction with shock waveform database, global alignment is carried out to technical indicators such as the correlations, mutation rate, polarity of fault waveform.It is intermediate
Processing element receives the acquisition signal of residual current transformer, and by comparing amplification output to primary processor, primary processor passes through
All-wave adds half-wave to intersect the shock waveform recognition methods compared point by point to judge whether there is shock waveform, and passes through control buckle releaser pair
Executive component is controlled.Have the gradual residual current not malfunction in residual current threshold value and detects that shock waveform is surplus
The function of tripping in time when aftercurrent substantially increases operational percentage and has ensured personal safety, ensure that the stability of power supply.
Detailed description of the invention
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 to intersect the shock waveform recognition methods process compared point by point
Figure；
Fig. 6 is the anti-personal electrical shock circuit breaker Control system architecture based on Waveform Identification Technology proposed by the present invention
Figure.
Specific embodiment
The specific embodiment of the invention is described with reference to the accompanying drawings and embodiments:
The shock current of human body is flowed through when getting an electric shock by impedance operator when further investigation human body (animal) electric shock
It is imported into residual current as a special mutation increment.According to this principle, the design proposes all-wave and half-wave is added to hand over point by point
The shock waveform recognition methods compared is pitched, shock waveform is isolated from residual current.The optimization that algorithm is engineered
Processing, has the gradual residual current not malfunction in residual current threshold value and detects timely when shock waveform residual current
The function of tripping substantially increases operational percentage and has ensured personal safety, ensure 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, comprising the following steps:
Step 101, the residual current for the detecting element acquisition power circuit being arranged on power circuit is simultaneously sent；
Step 102, central processing element adds half-wave to intersect the shock waveform recognition methods compared point by point to surplus using all-wave
Aftercurrent is handled and exports control instruction；
Step 103, the executive component being arranged on power circuit receives control instruction and realizes the closure of power circuit or cut
It is disconnected.
In the embodiment of the present invention, the residual current on power circuit is referred to and is connect in low-voltage network using TN, TT
In the environment of line mode, because of leaky caused by dielectric level reduction or mediate contact.The method compared using intersection
Waveform Identification Technology, failure residual current is analyzed, reach identification shock waveform target.With signal processing and divide
The means of analysis integrate the technical indicators such as the correlation, mutation rate, polarity of fault waveform in conjunction with shock waveform database
It compares.Intermediate processing element receives the acquisition signal of residual current transformer, by comparing amplification output to primary processor, main place
Reason device adds half-wave to intersect the shock waveform recognition methods compared point by point to judge whether there is shock waveform by all-wave, and passes through control
Buckle releaser controls 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, master
Processor and buckle releaser, the output end connection amplifier of the residual current transformer, the output end comparator of the amplifier,
The output end of the comparator connects primary processor, and the output end of the primary processor connects buckle releaser, the buckle releaser with hold
Row switch connection.
Referring to Fig. 5, half-wave is added to intersect the shock waveform identification side compared point by point for the all-wave proposed by the present invention
Method flow chart；
As shown in figure 5, all-wave adds half-wave to intersect the shock waveform recognition methods compared point by point, comprising the following steps:
Analysis residual current data in real time, are arranged two buffer areas, are defined as BuffA and BuffB, calculate number in BuffA
According to mutation rate δ (di/dt), by its modulus value | δ | with mutation rate threshold value δsIt is compared, when | δ | it is greater than δsWhen, it is transferred to third step,
Otherwise it exits this waveform and differentiates process；According to the polarity of δ, from shock waveform database, the certain wave of identical polar is selected
Graphic data collection { W }, carries out calculating correlation coefficient ρ one by onexy, extracting waveform correlation coefficient is more than threshold valueWave data group again
At a waveform dataset { Wx }, when { Wx } medium wave figurate number mesh is 0, shows that there is no similar waveforms, exit this waveform and sentence
Other process；Calculate waveform same waveform data set { Wx } the relative coefficient ρ in BuffBxy, work as ρxyGreater than threshold valueWhen, differentiate event
Barrier is electric shock, starts subsequent protection act, this waveform differentiates that process terminates.
Further, the data length of BuffA 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 area is according to number
According to throughput ds real-time update.
In this process, primary processor analyzes residual current data in real time, and two buffer areas are arranged, be defined as BuffA and
The data length of BuffB, BuffA are dimensioned to the data length of 1 cycle (all-wave), the number of BuffB according to sample rate f s
The data length of 1.5 cycles (all-wave+half-wave), BuffA and BuffB buffer area are dimensioned to according to sample rate f s according to length
According to data throughput ds real-time update；The mutation rate δ (di/dt) for calculating data in BuffA, by its modulus value | δ | same to mutation rate
Threshold value δsIt is compared, when | δ | it is greater than δsWhen, it is calculated in analysis into next step, otherwise exits this waveform and differentiate process；Root
According to the polarity of δ, from shock waveform database, the specific waveforms data set { W } of identical polar is selected, carries out calculating one by one related
Coefficient ρxy, extracting waveform correlation coefficient is more than threshold valueWave data reformulate a waveform dataset { Wx }, when in { Wx }
When waveform number is 0, show to exit this waveform there is no similar waveform and differentiate process；
Calculate waveform same waveform data set { Wx } the relative coefficient ρ in BuffBxy, work as ρxyGreater than threshold valueWhen, differentiate event
Barrier is electric shock, starts subsequent protection act, this waveform differentiates that process terminates.
Referring to Fig. 6, for the anti-personal electrical shock circuit breaker control system based on Waveform Identification Technology proposed by the present invention
Structure chart.
As shown in fig. 6, the breaker control system of the anti-person electric shock based on Waveform Identification Technology, comprising: be arranged in electricity
The residual current transformer of line of force road, intermediate processing element, 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 of the intermediate processing element, which executes, opens
Close, the intermediate processing element includes amplifier, comparator, primary processor and buckle releaser, the residual current transformer it is defeated
Outlet connects amplifier, and the output end of the output end comparator of the amplifier, the comparator connects primary processor, the master
The output end of processor connects buckle releaser, the buckle releaser and execution switch connection.
In the embodiment of the present invention, residual current action breaker is set on power circuit, when protected power circuit
Occur electric leakage or when someone gets an electric shock, due to the presence of residual current, by the phasor of each phase current of TA primary side and is no longer equal to
Zero, residual current is produced, so that there is alternating flux in TA iron core, under alternating flux effect, TA second siding ring is 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 made to be powered, driving main switch GF is jumped automatically
Lock, disengagement failure circuit, to realize protection.
Further, the primary processor uses the CPU processor of the NUC100RD2DN model of ARM-MO series.Pass through
The current signal for receiving residual current transformer monitoring adds half-wave to intersect point by point and compares after zoom comparison by internal all-wave
Shock waveform recognition methods, shock waveform is isolated from residual current, judge whether occur electric leakage or electric shock, control tripping
Device movement, cuts off the switch that executes being arranged on power circuit, and power circuit power-off guarantees the safety of power supply.
Further, the primary processor is also connected with display unit and RS485 communication unit.
Display unit can be using numeral method and indicator light display cooperation, can be to the three-phase voltage on power circuit
It is shown with three-phase current, the instruction such as alarm, failure also can be set, while data setting can also be carried out and inquiry refers to
Show.RS485 communication unit carries out intelligent communication management using MODBUS specification.
The preferred embodiment for the present invention is explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Mode within the knowledge of a person skilled in the art can also be without departing from the purpose of the present invention
It makes a variety of changes, these variations are related to the relevant technologies well-known to those skilled in the art, these both fall within the invention patent
Protection scope.
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 (7)
1. the anti-personal electrical shock circuit breaker control method based on Waveform Identification Technology, which comprises the following steps:
The residual current for the detecting element acquisition power circuit being arranged on power circuit is simultaneously sent；
Central processing element using all-wave add half-wave intersect point by point the shock waveform recognition methods compared to residual current at
It manages and exports control instruction；
The executive component being arranged on power circuit receives closure or cutting that control instruction realizes power circuit；
The all-wave adds half-wave to intersect the shock waveform recognition methods compared point by point, comprising the following steps:
Step 1 analyzes residual current data in real time, two buffer areas is arranged, are defined as BuffA and BuffB,
Step 2 calculates the mutation rate δ of data in BuffA, by its modulus value | δ | with mutation rate threshold value δsIt is compared, when | δ | it is big
In δsWhen, it is transferred to third step, this waveform is otherwise exited and differentiates process；
Step 3 from shock waveform database, selects the specific waveforms data set { W } of identical polar according to the polarity of δ, by
One carries out calculating correlation coefficient ρxy, extracting waveform correlation coefficient is more than threshold valueWave data reformulate a Wave data
Collect { Wx }, when { Wx } medium wave figurate number mesh is 0, shows to exit this waveform there is no similar waveform and differentiate process；
Step 4 calculates waveform same waveform data set { Wx } the relative coefficient ρ in BuffBxy, work as ρxyGreater than threshold valueWhen, differentiate
Failure is electric shock, starts subsequent protection act, this waveform differentiates that process terminates.
2. the anti-personal electrical shock circuit breaker control method according to claim 1 based on Waveform Identification Technology, feature exist
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, feature exist
In, the central processing element include amplifier, comparator, primary processor and buckle releaser, the residual current transformer it is defeated
Outlet connects amplifier, and the output end of the output end comparator of the amplifier, the comparator connects primary processor, the master
The output end of processor connects buckle releaser, the buckle releaser and execution switch connection.
4. the anti-personal electrical shock circuit breaker control method according to claim 1 based on Waveform Identification Technology, feature exist
In the data length of the BuffA is dimensioned to the data length of 1 cycle, the data length of BuffB according to sample rate f s
The data length of 1.5 cycles is dimensioned to according to sample rate f s, BuffA and BuffB buffer area is according to data throughput ds
Real-time update.
5. the anti-personal electrical shock circuit breaker control system based on Waveform Identification Technology, comprising: described in any in claim 1-4
Anti- personal contact open device control method based on Waveform Identification Technology, and the residual current mutual inductance being arranged on power circuit
Device, intermediate processing element, the execution switch and experiment component being arranged on power circuit；The output of the residual current transformer
The output end connection of end connection intermediate processing element, the intermediate processing element executes switch, and the intermediate processing element includes
The output end of amplifier, comparator, primary processor and buckle releaser, the residual current transformer connects amplifier, the amplification
The output end comparator of device, the output end of the comparator connect primary processor, and the output end of the primary processor connects tripping
Device, the buckle releaser and execution switch connection.
6. the anti-personal electrical shock circuit breaker control system according to claim 5 based on Waveform Identification Technology, feature exist
In the primary processor uses the CPU processor of the NUC100RD2DN model of ARM-MO series.
7. the anti-personal electrical shock circuit breaker control system according to claim 5 based on Waveform Identification Technology, feature exist
In the primary processor is also connected with display unit and RS485 communication unit.
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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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| 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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2017
- 2017-06-20 CN CN201710471249.4A patent/CN107276029B/en active Active
Patent Citations (5)
| 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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