CN110504663A - A kind of intelligent breaker and its guard method - Google Patents
A kind of intelligent breaker and its guard method Download PDFInfo
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- CN110504663A CN110504663A CN201910742093.8A CN201910742093A CN110504663A CN 110504663 A CN110504663 A CN 110504663A CN 201910742093 A CN201910742093 A CN 201910742093A CN 110504663 A CN110504663 A CN 110504663A
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- intelligent breaker
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/242—Home appliances
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a kind of intelligent breaker and its guard methods; intelligent breaker includes signal processing unit, operating passing zero unit, communication unit, interface unit, master controller; guard method is based on intelligent breaker; it establishes on this basis and contains gateway, the Internet of Things framework of cloud service and mobile terminal.Guard method are as follows: troubleshooting measure is determined according to detection algorithm, judges whether load-side has arc fault, and combines grading criteria quantitative assessment fault level；Current arc fault rank is determined according to the signal energy value in the case of actual load；The delay time of disjunction major loop is determined according to the severity of arc fault, procedural information is sent to server background through communication module from the overall process occurred to circuit breaker trip by record electric arc.The present invention can be effectively protected and control to arc fault, realize safeguard protection to electrical appliance, the safety accident for avoiding long-term overload power utilization from causing.
Description
Technical field
The present invention relates to intelligent adapted electro-technical field more particularly to a kind of intelligent breaker and its guard methods.
Background technique
Breaker is the electric current referred to close, carry and cut-off under normal loop condition and can close before the deadline
Close, carry and cut-off the switching device of the electric current under abnormal loop condition.Breaker is divided into high-voltage circuitbreaker by its use scope
With low-voltage circuit breaker, high-low pressure identification of boundaries is relatively fuzzyyer, and 3kV or more is generally known as High-Voltage Electrical Appliances.
Breaker can be used to distribute electric energy, infrequently start asynchronous motor, carry out power circuit and motor etc.
Protection, when serious overload or short circuit and the failures such as under-voltage occurs in they can automatic shutdown circuit, function is equivalent to molten
Disconnected combination device formula switch and cross underheat relay etc..And change components are not needed generally after disjunction fault current.Mesh
Before, it has had been widely used.
The currently a popular product for measuring the energy-saving breakers such as breaker, time out-out, remote-control circuit breaker, can solve
Certainly part practical problem, but all there are various defects, is especially effectively protected arc fault shortage and control measure, can not be right
Electrical appliance realizes safeguard protection, the safety accident that it is even more impossible to avoid long-term overload power utilization from causing.
Summary of the invention
In view of the above drawbacks of the prior art, technical problem to be solved by the invention is to provide a kind of intelligent breakers
And its guard method, so as to solve the deficiencies in the prior art.
To achieve the above object, the present invention provides a kind of intelligent breakers, including signal processing unit, operating passing zero list
Member, communication unit, interface unit, master controller and power supply, the signal processing unit, communication unit, connect operating passing zero unit
Mouth unit is electrically connected with master controller, and the operating passing zero unit is electrically connected with interface unit, in which: the signal processing list
First collection voltages and current waveform are simultaneously filtered and shaping, are converted to the signal-under-test that can input master controller；The mistake
Zero switching unit respectively throws main loop in voltage, current zero-crossing point, cuts control；The communication unit is for leading
Controller and external communication；The interface unit includes a major loop part and human-computer interaction part, a major loop
Part outputs and inputs for alternating current, and the human-computer interaction part is signal designation and key-press input；Event built in the master controller
Hinder arc protection algorithm, protection decision is handled and made to the signal-under-test of signal processing unit input, described in control
The working condition of signal processing unit, operating passing zero unit, communication unit, interface unit.
Above-mentioned signal processing unit is by current sampling circuit, voltage sampling circuit, filter circuit, amplifying circuit and rectified current
Road composition, the filter circuit remove the low frequency and UHF part in low-voltage signal, and taking frequency range is the effective of 2kHz-10kHz
Arc signal.
Above-mentioned operating passing zero unit includes that hardware executes and zero passage detection unit two parts, the work of the zero passage detection unit
Make mechanism are as follows: capture circuit obtains the zero-acrross ing moment t of load voltage and electric current0, the frequency f of system voltage is calculated in frequency,
The execution delay time of relay is td, t at the time of issuing operational orderp,N is
Shift to an earlier date periodicity, t in advance0It is taken as 0.
Above-mentioned communication unit is used for master controller and external communication, realizes that intelligent breaker interacts electric arc event with far end system
Hinder information and control instruction, communication modes are divided into wired and wireless two major classes, wire communication mode include but is not limited to optical fiber,
General cable and power line carrier, wireless communication mode include but is not limited to 4G, Wi-Fi, LoRa, NB-Iot, ZigBee.
Above-mentioned interface unit indicates current arc fault level, and arc fault higher grade, and it is more serious to represent arc fault；
The interface unit includes a major loop part and human-computer interaction part, and one time major loop part outputs and inputs for alternating current,
The voltage range of alternating current is 100V-240V, frequency range are as follows: 48Hz-62Hz；Human-computer interaction part is that signal designation and key are defeated
Enter, signal lamp includes yellow, green, red 3 monochromatic burners and 1 tri coloured lantern.
Troubleshooting measure is determined according to detection algorithm, judges whether load-side has arc fault, and combines grading criteria
Quantitative assessment fault level；
Current arc fault rank is determined according to the signal energy value in the case of actual load；
The delay time of disjunction major loop is determined according to the severity of arc fault, record electric arc is from occurring breaker
The overall process of tripping, and procedural information is sent to server background through communication module.
Above-mentioned detection algorithm is wavelet transform and SIGNAL ENERGY ANALYSIS；The discrete wavelet transformer exchanges db13 for as logical
Take D6-D8 signal as criterion input signal, when load is switch electricity when load is purely resistive or resistance sense with morther wavelet
When the property of source, take D5-D7 as criterion input signal, any component is greater than 1 in the criterion input signal, can qualitatively sentence
It is disconnected that arc fault has occurred.
The calculation formula of above-mentioned signal energy E (s) are as follows:N is signal total length, and i is length variable, s
(t)iFor the instantaneous value for taking i-th of signal moment.
The rational judgment mode of above-mentioned arc fault grade determines by signal energy, according to the load of different load property,
Arc fault grade is divided into 3 grades, when arc fault grade changes, original delay time keeps being incremented by, any delay
It reaches, i.e., transmittable trip command, the actual arc fault level at malfunction indicator lamp instruction tripping moment.
The troubleshooting measure of above-mentioned master controller includes trip protection, request user's decision and maintains the statusquo 3 kinds, is protected
Tripping disconnects circuit by operating passing zero unit, and request user's decision mode is realized by Internet of Things framework, maintains the statusquo and does not do
Any processing；Wherein, Internet of Things framework includes the intelligent breaker, gateway, Cloud Server and mobile terminal, and more intelligence are disconnected
The fault electric arc grade and calculated result that road device will test are sent to Cloud Server by gateway, and Cloud Server is to received
Data stored, and fault electric arc event is sent to the mobile terminal of user, user according to intelligent breaker environment and
Operating condition determines that Preservation tactics, the Preservation tactics are transmitted to intelligent breaker through former road, and intelligent breaker finally executed
Zero excision is maintained the statusquo.
The beneficial effects of the present invention are:
Intelligent breaker of the invention includes signal processing unit, operating passing zero unit, communication unit, interface unit, master
Controller, guard method are based on intelligent breaker, establish contain gateway, the Internet of Things of cloud service and mobile terminal on this basis
Framework.Fault electric arc detection algorithm built in the master controller of intelligent breaker determines troubleshooting measure, inspection according to testing result
Method of determining and calculating is wavelet transform and SIGNAL ENERGY ANALYSIS, judges whether load-side has arc fault, and combines grading criteria fixed
Amount evaluation fault level, master controller determine the delay time of disjunction major loop, main control according to the severity of arc fault
Device records electric arc from the overall process occurred to circuit breaker trip, and by the procedural information after communication module is sent to server
Platform.The present invention can be effectively protected and control to arc fault, realize safeguard protection to electrical appliance, long-term excess load is avoided to use
The safety accident that electricity causes.
It is described further below with reference to technical effect of the attached drawing to design of the invention, specific structure and generation, with
It is fully understood from the purpose of the present invention, feature and effect.
Detailed description of the invention
Fig. 1 is intelligent breaker schematic diagram of the invention；
Fig. 2 is the Internet of Things framework map of the embodiment of the present invention.
Specific embodiment
The present invention provides a kind of intelligent breaker, including signal processing unit, operating passing zero unit, communication unit, connect
Mouthful unit, master controller and power supply, signal processing unit, operating passing zero unit, communication unit, interface unit are and master controller
Electrical connection, operating passing zero unit are electrically connected with interface unit, in which:
Signal processing unit collection voltages and current waveform are simultaneously filtered and shaping, and master controller can be inputted by being converted to
Signal-under-test；
Operating passing zero unit respectively throws main loop in voltage, current zero-crossing point, cuts control；
Communication unit is used for master controller and external communication；
Interface unit includes a major loop and human-computer interaction part, and one time major loop part outputs and inputs for alternating current,
Human-computer interaction part is signal designation and key-press input；
Fault electric arc protection algorism built in master controller handles simultaneously the signal-under-test of signal processing unit input
Make protection decision, the working condition of control signal processing unit, operating passing zero unit, communication unit, interface unit.
Wherein, signal processing unit is by current sampling circuit, voltage sampling circuit, filter circuit, amplifying circuit and rectification
Circuit composition, filter circuit remove the low frequency and UHF part in low-voltage signal, and taking frequency range is effective electricity of 2kHz-10kHz
Arc signal.
Wherein, operating passing zero unit includes that hardware executes and zero passage detection unit two parts, the work of zero passage detection unit
Mechanism are as follows: capture circuit obtains the zero-acrross ing moment t of load voltage and electric current0, the frequency f of system voltage is calculated in frequency, after
The execution delay time of electric appliance is td, t at the time of issuing operational orderp,N is pre-
Periodicity in advance, t0It is taken as 0.
Wherein, communication unit is used for master controller and external communication, realizes that intelligent breaker interacts electric arc with far end system
Fault message and control instruction, communication modes are divided into wired and wireless two major classes, and wire communication mode includes but is not limited to light
Fine, general cable and power line carrier, wireless communication mode include but is not limited to 4G, Wi-Fi, LoRa, NB-Iot, ZigBee.
Wherein, interface unit includes a major loop and human-computer interaction part, major loop part be alternating current input and
Output, the voltage range of alternating current are 100V-240V, frequency range are as follows: 48Hz-62Hz；Human-computer interaction part be signal designation with
Key-press input, signal lamp include yellow, green, red 3 monochromatic burners and 1 tri coloured lantern.
The present invention also provides a kind of intelligent breaker guard method, fault electric arc built in the master controller of intelligent breaker is examined
Method of determining and calculating, master controller determine troubleshooting measure according to testing result, and detection algorithm is wavelet transform and signal energy
Analysis, judges whether load-side has arc fault, and combines grading criteria quantitative assessment fault level；The master control of intelligent breaker
Device processed determines current arc fault rank according to the signal energy value in the case of actual load, and interface unit indicates current arc
Fault level, arc fault higher grade, represents that arc fault is more serious, and master controller is true according to the severity of arc fault
Determine the delay time of disjunction major loop, master controller records electric arc from the overall process occurred to circuit breaker trip, and by the process
Information is sent to server background through communication module.
Wherein, discrete wavelet transformer exchanges db13 for as general morther wavelet and takes D6- when load is purely resistive or resistance sense
D8 signal takes D5-D7 as criterion input signal, criterion is defeated as criterion input signal when load is Switching Power Supply property
Enter any component in signal and be greater than 1, can qualitatively judge that arc fault has occurred.
Wherein, the calculation formula of signal energy E (s) are as follows:N is signal total length, and i is length variable,
s(t)iFor the instantaneous value for taking i-th of signal moment.
Wherein, the rational judgment mode of arc fault grade is determined by signal energy, according to the load of different load property,
Arc fault grade is divided into 3 grades, when arc fault grade changes, original delay time keeps being incremented by, any delay
It reaches, i.e., transmittable trip command, the actual arc fault level at malfunction indicator lamp instruction tripping moment.
Wherein, the troubleshooting measure of master controller includes trip protection, request user's decision and maintains the statusquo 3 kinds, is protected
Shield tripping disconnects circuit by operating passing zero unit, and request user's decision mode is realized by Internet of Things framework, maintains the statusquo not
Do any processing；Wherein, Internet of Things framework includes intelligent breaker, gateway, Cloud Server and mobile terminal, more intelligence open circuits
The fault electric arc grade and calculated result that device will test are sent to Cloud Server by gateway, and Cloud Server is to received
Data are stored, and fault electric arc event is sent to the mobile terminal of user, and user is according to intelligent breaker environment and fortune
Row operating condition determines that Preservation tactics, Preservation tactics are transmitted to intelligent breaker through former road, and intelligent breaker finally executes zero passage excision
Or it maintains the statusquo.
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and in combination with Examples.It should be noted that not conflicting
In the case of, the features in the embodiments and the embodiments of the present application can be combined with each other.
As shown in Figure 1, according to an embodiment of the invention, intelligent breaker include signal processing unit, operating passing zero unit,
Communication unit, interface unit, master controller and power supply.
Wherein, signal processing unit is by current sampling circuit, voltage sampling circuit, filter circuit, amplifying circuit and rectification
Circuit composition.By the way that high voltage and high current signal are switched to the small signal of low pressure to voltage and current sample, pass through filter circuit
The low frequency and UHF part in low-voltage signal are removed, effective arc signal of frequency range 2kHz-10kHz is taken, then is whole by all-wave
Current circuit is converted into the tested direct current signal that can input master controller.
Wherein, operating passing zero unit includes hardware execution circuit and zero passage detection unit two parts, and the hardware executes electricity
Road is relay and its driving circuit, and zero passage detection unit includes zero passage capture, frequency calculates and zero passage backoff algorithm.Zero passage is caught
Acquire the zero-acrross ing moment t of load voltage and electric current0, the frequency f of system voltage is calculated in frequency, and relay executes delay
Time is td.Zero passage compensation calculation is completed in the master controller, after the instruction for receiving the master controller, in voltage, electricity
Main loop is thrown respectively when flowing through zero point, cuts control.The zero passage compensation calculation mode of master controller are as follows:
tpAt the time of to issue operational order, n is to shift to an earlier date periodicity, depending on the response demand of application, t in advance0It is logical
Often it is taken as 0.
Wherein, communication unit is used for master controller and external communication, realizes that intelligent breaker interacts electric arc with far end system
Fault message and control instruction, communication modes are divided into wired and wireless 2 major class, and wire communication mode includes but is not limited to light
Fine, general cable and power line carrier, wireless communication mode include but is not limited to 4G, Wi-Fi, LoRa, NB-Iot, ZigBee
Deng.
Wherein, interface unit includes a major loop and human-computer interaction part.Major loop part be alternating current input and
Output, the voltage range of alternating current are 100V-240V, frequency range are as follows: 48Hz-62Hz outputs and inputs interface using general
Metal casting and insulation external member.Human-computer interaction part is signal designation and key-press input, and signal lamp includes yellow, green, red 3
Monochromatic burner and 1 tri coloured lantern.The power supply status of monochromatic red light instruction breaker, lights representative normally, extinguishing represents abnormal；It is monochromatic
Green light indicates the division state of breaker primary circuit, lights representative closure, and extinguishing represents disjunction；Monochromatic amber light indicates breaker
Current connected state, lights representative networking, and extinguishing represents off-network；Tri coloured lantern includes yellow, green, red totally 3 kinds of colors, is indicated respectively
The different brackets of arc fault, green light is bright to represent level-one arc fault, and amber light is bright to represent second level arc fault, and red colored lamp is bright
Three-level arc fault is represented, tri coloured lantern, which extinguishes, to be represented without arc fault.
Wherein, master controller carries out wavelet transform and signal energy to the signal-under-test that signal processing unit inputs
Analysis, judges whether load-side has arc signal generation.If there is electric arc generates, the corresponding electric arc event of the signal is further judged
Hinder grade, and exports to interface unit and indicate current arc fault level.
Preferably, discrete wavelet transformer exchanges db13 for as general morther wavelet and takes when load is purely resistive or resistance sense
D6-D8 signal takes D5-D7 as criterion input signal as criterion input signal when load is Switching Power Supply property.It is described
Any component is greater than 1 in criterion input signal, can qualitatively judge that arc fault has occurred.
Preferably, the calculation method of signal energy E (s) are as follows:
N is signal total length, and i is length variable, s (t)iFor the instantaneous value for taking i-th of signal moment.
In the present embodiment, the rational judgment mode of electric arc severity is as follows:
Master controller determines current arc fault rank, interface unit according to the signal energy value in the case of actual load
Indicate current arc fault level.Arc fault higher grade, represents that arc fault is more serious, and master controller is according to arc fault
Severity determine delay time of disjunction major loop, level-one arc fault delay time of tripping is 3 seconds, second level arc fault
Tripping delay time is 2 seconds, and three-level arc fault tripping delay time is 1 second.It is original when arc fault grade changes
Delay time keeps being incremented by, and any delay reaches, i.e., transmittable trip command, the practical electricity at malfunction indicator lamp instruction tripping moment
Arc fault level.Master controller records electric arc from the overall process occurred to circuit breaker trip, and by the procedural information through communicating mould
Block is sent to server background.
Preferably, in any case, master controller receives key control instruction, and button operation is disconnected for overturning intelligence in short-term
The on off operating mode of road device major loop, key is used for the parameter configuration of intelligent breaker when long.Often by primary to major loop state
Inversion operation is carried out, the inversion operation refers to: when major loop is disjunction state, after monitoring key-press input, closure major loop；When
Major loop is closed state, after monitoring key-press input, disjunction major loop.It is disconnected for configuring to be continued above 3 seconds button operations
The parameter of road device, including operation definite value and network parameter etc..
It is as described in Figure 2 the Internet of Things framework of the embodiment of the present invention, including the intelligent breaker, gateway, Cloud Server
And mobile terminal.The fault electric arc grade and calculated result that more intelligent breakers will test are sent to cloud service by gateway
Device, Cloud Server store received data, and fault electric arc event is sent to the mobile terminal of user.User
Determine that Preservation tactics, the Preservation tactics are transmitted to intelligent breaker through former road according to intelligent breaker environment and operating condition,
Zero passage excision is finally executed by intelligent breaker or is maintained the statusquo.
Wherein, intelligent breaker power supply is general AC/DC conversion module, provides 5V or 12V work for intelligent breaker system
Make voltage.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be within the scope of protection determined by the claims.
Claims (10)
1. a kind of intelligent breaker, it is characterised in that: including signal processing unit, operating passing zero unit, communication unit, interface list
Member, master controller and power supply, the signal processing unit, operating passing zero unit, communication unit, interface unit are and master controller
Electrical connection, the operating passing zero unit are electrically connected with interface unit, in which:
The signal processing unit collection voltages and current waveform are simultaneously filtered and shaping, and master controller can be inputted by being converted to
Signal-under-test；
The operating passing zero unit respectively throws main loop in voltage, current zero-crossing point, cuts control；
The communication unit is used for master controller and external communication；
The interface unit includes a major loop part and human-computer interaction part, and a major loop part is alternating current input
And output, the human-computer interaction part are signal designation and key-press input；
Fault electric arc protection algorism built in the master controller handles simultaneously the signal-under-test of signal processing unit input
Protection decision is made, the working condition of the signal processing unit, operating passing zero unit, communication unit, interface unit is controlled.
2. intelligent breaker as described in claim 1, it is characterised in that: the signal processing unit by current sampling circuit,
Voltage sampling circuit, filter circuit, amplifying circuit and rectification circuit composition, the filter circuit remove the low frequency in low-voltage signal
And UHF part, taking frequency range is effective arc signal of 2kHz-10kHz.
3. intelligent breaker as described in claim 1, it is characterised in that: the operating passing zero unit includes hardware execution and mistake
Zero detection unit two parts, the working mechanism of the zero passage detection unit are as follows: capture circuit obtains the mistake of load voltage and electric current
Zero moment t0, frequency is calculated the frequency f of system voltage, and the execution delay time of relay is td, issue operational order when
Carve tp,N is to shift to an earlier date periodicity, t in advance0It is taken as 0.
4. intelligent breaker as described in claim 1, it is characterised in that: the communication unit is logical for master controller and outside
News realize that intelligent breaker interacts arc fault information and control instruction with far end system, and communication modes are divided into wired and nothing
Line two major classes, wire communication mode include but is not limited to optical fiber, general cable and power line carrier, wireless communication mode include but
It is not limited to 4G, Wi-Fi, LoRa, NB-Iot, ZigBee.
5. intelligent breaker as described in claim 1, it is characterised in that: described interface unit instruction current arc failure etc.
Grade, arc fault higher grade, and it is more serious to represent arc fault；The interface unit includes a major loop part and man-machine friendship
Mutual part, one time major loop part outputs and inputs for alternating current, and the voltage range of alternating current is 100V-240V, frequency range are as follows:
48Hz-62Hz；Human-computer interaction part is signal designation and key-press input, and signal lamp includes yellow, green, red 3 monochromatic burners and 1
A tri coloured lantern.
6. the guard method of intelligent breaker described in -5 any one according to claim 1, it is characterised in that:
Troubleshooting measure is determined according to detection algorithm, judges whether load-side has arc fault, and combines grading criteria quantitative
Evaluate fault level；
Current arc fault rank is determined according to the signal energy value in the case of actual load；
The delay time of disjunction major loop is determined according to the severity of arc fault, record electric arc is from occurring circuit breaker trip
Overall process, and procedural information is sent to server background through communication module.
7. guard method as claimed in claim 6, it is characterised in that: the detection algorithm is wavelet transform and signal energy
Amount analysis；The discrete wavelet transformer exchanges db13 for as general morther wavelet and takes D6-D8 when load is purely resistive or resistance sense
Signal takes D5-D7 as criterion input signal, the criterion as criterion input signal when load is Switching Power Supply property
Any component is greater than 1 in input signal, can qualitatively judge that arc fault has occurred.
8. guard method as claimed in claim 6, it is characterised in that: the calculation formula of the signal energy E (s) are as follows:N is signal total length, and i is length variable, s (t)iFor the instantaneous value for taking i-th of signal moment.
9. guard method as claimed in claim 6, it is characterised in that: the rational judgment mode of the arc fault grade is by believing
Number energy determines, according to the load of different load property, arc fault grade is divided into 3 grades, when arc fault grade becomes
When change, original delay time keeps being incremented by, and any delay reaches, i.e., transmittable trip command, when malfunction indicator lamp indicates tripping
The actual arc fault level at quarter.
10. guard method as claimed in claim 6, it is characterised in that: the troubleshooting measure of the master controller includes protecting
Shield tripping requests user's decision and maintains the statusquo 3 kinds, and trip protection disconnects circuit by operating passing zero unit, and request user determines
Plan mode is realized by Internet of Things framework, is maintained the statusquo without any processing；Wherein, Internet of Things framework includes the intelligence open circuit
Device, gateway, Cloud Server and mobile terminal, the fault electric arc grade and calculated result that more intelligent breakers will test pass through
Gateway is sent to Cloud Server, and Cloud Server stores received data, and fault electric arc event is sent to use
The mobile terminal at family, user determine Preservation tactics according to intelligent breaker environment and operating condition, and the Preservation tactics are through former road
It is transmitted to intelligent breaker, intelligent breaker finally executes zero passage excision or maintains the statusquo.
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|---|---|
| CN110504663B (en) | 2021-11-02 |
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