CN107994555A - Single-phase arc extinguishing type breaker and short-circuit protection method with real-time monitoring and control - Google Patents
Single-phase arc extinguishing type breaker and short-circuit protection method with real-time monitoring and control Download PDFInfo
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- CN107994555A CN107994555A CN201810055908.0A CN201810055908A CN107994555A CN 107994555 A CN107994555 A CN 107994555A CN 201810055908 A CN201810055908 A CN 201810055908A CN 107994555 A CN107994555 A CN 107994555A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000012544 monitoring process Methods 0.000 title claims abstract description 16
- 238000005070 sampling Methods 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 6
- 239000013078 crystal Substances 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 claims description 7
- 239000004973 liquid crystal related substance Substances 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 2
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Classifications
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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Abstract
The present invention relates to a kind of single-phase arc extinguishing type breaker with real-time monitoring and control, including：Power circuit, including：The IGBT circuits being connected between input power grid end and output loading end；Sample circuit, for obtaining the first sampled voltage and the second sampled voltage；Microprocessing unit, for compared with a preset reference magnitude of voltage, and the first sampled voltage or the second sampled voltage to be exported a control signal when sampled voltage is more than preset reference magnitude of voltage；Drive circuit, for being disconnected according to control signal control power circuit；And sampling display unit.The voltage in power grid is sampled by sample circuit; and by microprocessing unit by sampled voltage compared with preset reference magnitude of voltage; when a short circuit occurs; microprocessing unit and generation control signal control IGBT circuit shut-offs; play the role of short-circuit protection; since whole control process is realized by electric signal transmission, response is rapider, reduces security incident odds.
Description
Technical field
The present invention relates to breaker technical field, more specifically, it relates to a kind of single-phase with real-time monitoring and control
Arc extinguishing type breaker.
Background technology
Breaker can not only connect in a power distribution system with disjunction normal duty electric current, can also disconnect short trouble electricity
Stream, can timely and effectively cut off short trouble, ensure power system security stable operation.
Traditional breaker is disconnected electric supply system by mechanical switch automatic trip in short circuit, due to its internal machine
The inherent characteristic of tool switch, the time of its electric power system of cutting off the power is longer, usually in a few tens of milliseconds between hundreds of milliseconds, because
Short circuit place contact resistance is small, and the electric current for easily leading to current supply circuit increased dramatically, the temperature of current supply circuit conductor steeply rises, short-circuit
Point produces very strong dangerous arc spark, its high temperature produced and arc electrode fire hazardous or electric shock and other safety accidents.
The content of the invention
In view of the deficienciess of the prior art, the first purpose of the embodiment of the present invention is that providing one kind has real time monitoring
The single-phase arc extinguishing type breaker of function, has the advantages that response is rapid, reduces accident.
The above-mentioned technical purpose of the embodiment of the present invention technical scheme is that：
A kind of single-phase arc extinguishing type breaker with real-time monitoring and control, including：
Power circuit, including：The IGBT circuits being connected between input power grid end and output loading end, for control input power grid
The break-make of power grid between end and output loading end；
Sample circuit, for the positive half cycle voltage between the input power grid end and the output loading end to be sampled and obtained
To the first sampled voltage, the negative half period voltage between the input power grid end and the output loading end is sampled and obtained
Second sampled voltage；
Microprocessing unit, for the first sampled voltage for obtaining the sample circuit or the second sampled voltage and a preset reference
Magnitude of voltage is compared, and is exported when first sampled voltage or the second sampled voltage are more than the preset reference magnitude of voltage
One control signal；And
Drive circuit, for controlling the power circuit to disconnect according to the control signal；And
Display unit is sampled, is shown for carrying out sampling to the real-time voltage value in power grid and real-time current value；
Wherein, the sampling display unit includes：
Voltage acquisition module be connected with the microprocessing unit, for obtaining real-time voltage value in power supply grid；
Current acquisition module be connected with the microprocessing unit, for obtaining real-time current value in power supply grid；And
Display be connected with the microprocessing unit, for showing the real-time voltage value and the real-time current value.
By using above-mentioned technical proposal, sample circuit samples the voltage in power grid, and passes through microprocessing unit
By the first sampled voltage and the second sampled voltage compared with preset reference magnitude of voltage, when a short circuit occurs, the first sampling electricity
Pressure or the second sampled voltage are increased to more than preset reference magnitude of voltage, microprocessing unit and generation control signal control IGBT circuits
Shut-off, plays the role of short-circuit protection, since whole control process is via sampling, control and IGBT cooperative achievements, response
It is more rapid, reduce security incident odds；Meanwhile the real-time voltage value in voltage acquisition module collection power grid, electricity
The real-time current value in acquisition module collection power grid is flowed, and is shown by display, so that convenient to the voltage in power grid
Monitored in real time with electric current.
Further, the IGBT circuits include：
First crystal triode, including：First input end, the first output terminal and the first control terminal, the first input end connection
To input power grid end；
Second transistor, including：Second input terminal, the second output terminal and the second control terminal, the second input terminal connection
To output loading end, second output terminal is connected with the first output, and second control terminal is connected with the first control terminal；
First diode, including the first anode and the first cathode, the first anode connection first output terminal, described first
Cathode is connected to first input end；And
Second diode, including second plate and the second cathode, the second plate are connected to the second output terminal, and described second is cloudy
Pole is connected to the second input terminal.
By using above-mentioned technical proposal, in normal work, the first control terminal and the second control terminal are high level, IGBT
Circuit is in the conduction state, and when AC network is in positive half cycle, first crystal triode and the second diode current flow, realize energy
Amount is transmitted from input power grid end to output loading end, when alternating current is in negative half period, the second transistor and the one or two pole
Pipe turns on, and realizes that energy is transmitted from input power grid end to output loading end；When a short circuit occurs, sampled voltage is increased to more than pre-
If reference voltage value, microprocessing unit and generation control signal control IGBT circuit shut-offs, you can cut off the power supply of power grid, play
The effect of short-circuit protection.
Further, the sample circuit includes the 3rd diode and the 4th diode, the 3rd diode include with
First cathode the 3rd cathode being connected and the third anode being connected with the microprocessing unit, the 4th diode include
The 4th cathode being connected with second cathode and the 4th anode being connected with the microprocessing unit, the sample circuit is through institute
The 3rd diode is stated to obtain the first sampled voltage, obtain the second sampled voltage through the 4th diode.
By using above-mentioned technical proposal, in normal work, the 3rd diode and the 4th diode are in the shape ended
State, i.e. the first sampled voltage and the second sampled voltage are zero or relatively low, so that the state of preset reference magnitude of voltage is remained less than, when
When generation is short-circuit, the 3rd diode and the 4th diode are breakdown, and the first sampled voltage or the second sampled voltage are rapidly increased to
More than preset reference magnitude of voltage.
Further, the microprocessing unit includes：
Comparable chip, be connected with the sample circuit, there is a preset reference magnitude of voltage, for by first sampled voltage and
Second sampled voltage is compared with the preset reference magnitude of voltage and generates command signal；And
Micro-chip processor, is connected with the comparable chip, for being handled described instruction signal and in the described first sampling
Any one in voltage and second sampled voltage exports the control signal when being more than the preset reference magnitude of voltage, described
Sampling display unit is connected to the micro-chip processor.
By using above-mentioned technical proposal, by comparable chip by the first sampled voltage and the second sampled voltage and preset reference
Magnitude of voltage is compared, and is sent according to comparative result generation command signal to micro-chip processor, then is carried out by micro-chip processor
Processing, generates control signal.
Further, the drive circuit includes：
Driving chip, is connected with the micro-chip processor, turns off the power circuit with according to the control signal；And
On-off circuit, including：3rd transistor and the 4th transistor, the 3rd transistor include：3rd
Input terminal, the 3rd output terminal and the 3rd control terminal, the 3rd input terminal are connected with the high-potential output end of the driving chip,
3rd control terminal is connected with the output terminal of the driving chip, and the 4th transistor includes：4th input terminal,
Four output terminals and the 4th control terminal, the 4th output terminal are connected with the low potential output terminal of the driving chip, and the described 4th
Control terminal is connected with the output terminal of the driving chip, and the 3rd output terminal described in the 4th input terminal is connected, and the described 3rd
Output terminal and the 4th input terminal are connected with the first control terminal and the second control terminal.
By using above-mentioned technical proposal, after control signal is sent to driving chip, the output terminal output of driving chip is low
Level signal, the 3rd transistor and the 4th transistor are off state, so that the first control terminal and second
Control terminal is also at low level state, and IGBT circuits are disconnected.
Further, the voltage acquisition module includes：The Hall voltage being connected between the firewire of power grid and zero curve passes
Sensor, and, it is connected with the Hall voltage sensor, for adjusting input voltage to the micro-chip processor operating voltage
In the range of voltage-regulating circuit.
Further, the current acquisition module includes：The Hall current sensor of the zero curve of power grid is connected to, and,
It is used to adjust input current to the electric current tune in the micro-chip processor current margin with the Hall current sensor
Whole circuit.
Further, the display includes liquid crystal display and/or LED display；The voltage-regulating circuit includes
Regulator circuit and/or reduction voltage circuit；The matrix current adjustment circuit includes rectification circuit and/or filter circuit.
By using above-mentioned technical proposal, the voltage in power grid is after Hall voltage sensor gathers by voltage-regulating circuit
Micro-chip processor is delivered to after adjustment, and is shown by display；Similarly, the electric current in power grid is through Hall current sensor
Micro-chip processor is delivered to after being adjusted after collection by matrix current adjustment circuit, and is shown by display.
Further, the micro-chip processor is also associated with input equipment, and the input equipment includes button.
By using above-mentioned technical proposal, the setting and switching on and shutting down operation of parameter are conveniently carried out by input equipment.
Second purpose of the embodiment of the present invention is to provide a kind of short-circuit protection method have and respond rapid, reduction accident
The advantages of generation.
The above-mentioned technical purpose of the embodiment of the present invention technical scheme is that：
A kind of short-circuit protection method, breaker of this method described in based on any of the above-described technical solution, including：
Obtain second sampled voltage and confession of first sampled voltage, alternating current of the alternating current in positive half cycle in negative half period
Real-time voltage value and real-time current value in power grid；
First sampled voltage and second sampled voltage are compared with a preset reference magnitude of voltage, and described first
Any one in sampled voltage and second sampled voltage exports the control signal when being more than the preset reference magnitude of voltage,
And the real-time voltage value and the real-time current value are shown to described by display；
Disconnected according to the power circuit between the control signal control input power grid end and output loading end.
By using above-mentioned technical proposal, the first sampled voltage and are carried out respectively in the positive half cycle and negative half period of alternating current
The collection of two sampled voltages, by the first sampled voltage and the second sampled voltage compared with preset reference magnitude of voltage, works as appearance
When short-circuit, the first sampled voltage or the second sampled voltage can raise and be more than preset reference magnitude of voltage, at this time rapid switch-off power
Circuit, realizes the effect of circuit protection, and responds rapidly, reduces security incident odds；Supplied at the same time by gathering
Real-time voltage value and real-time current value in power grid, and shown by display, so that convenient to the voltage in power grid
Monitored in real time with electric current.
In conclusion the invention has the advantages that：
First, response is rapider, security incident odds is reduced；
Second, the real-time voltage in power grid and real-time current state can be monitored.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structure diagram of the embodiment of the present invention.
Fig. 2 is power circuit in the embodiment of the present invention, micro-chip processor and the circuit diagram for sampling display unit.
Fig. 3 is the circuit diagram of comparable chip and its peripheral circuit in the embodiment of the present invention.
Fig. 4 is the circuit diagram of drive circuit in the embodiment of the present invention.
Fig. 5 is the flow chart of short-circuit protection method in the embodiment of the present invention.
In figure：1st, power circuit；2nd, sample circuit；3rd, microprocessing unit；31st, comparable chip；32nd, micro-chip processor；4、
Drive circuit；41st, driving chip；42nd, on-off circuit；5th, display circuit is sampled；51st, voltage sample module；511st, Hall voltage
Sensor；512nd, voltage-regulating circuit；52nd, current sample module；521st, Hall current sensor；522nd, matrix current adjustment circuit；
53rd, display；6th, input equipment.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment only part of the embodiment of the present invention, rather than whole embodiments.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained without creative efforts
Example is applied, belongs to the scope of protection of the invention.
A kind of single-phase arc extinguishing type breaker with real-time monitoring and control, as shown in Figure 1, including：Power circuit 1, including
The IGBT circuits being connected between input power grid end and output loading end；Sample circuit 2, for the input power grid end and institute
The positive half cycle voltage between output loading end is stated to be sampled and obtain the first sampled voltage, to it is described input power grid end with it is described
Negative half period voltage between output loading end is sampled and obtains the second sampled voltage；Microprocessing unit 3, for being adopted described
The first sampled voltage or the second sampled voltage that sample circuit 2 obtains are compared with a preset reference magnitude of voltage, and described the
One sampled voltage or the second sampled voltage export a control signal when being more than the preset reference magnitude of voltage；And drive circuit
4, for being disconnected according to control signal control power circuit 1.
Specifically, as shown in Fig. 2, IGBT circuits include：First crystal triode Q1, including it is first input end, first defeated
Outlet and the first control terminal, first input end are connected to input power grid end；Second transistor Q3, including the second input terminal,
Second output terminal and the second control terminal, the second input terminal are connected to output loading end, and the second output terminal is connected with the first output,
Second control terminal is connected with the first control terminal；First diode D1, including the first anode and the first cathode, first anode connection
First output terminal, the first cathode are connected to first input end；And the second diode D2, including second plate and the second cathode,
Second plate is connected to the second output terminal, and the second cathode is connected to the second input terminal.
Collector, the hair that it is respectively first crystal triode Q1 that first input end, the first output terminal and the first control terminal, which are,
Emitter-base bandgap grading and base stage, the second input terminal, the second output terminal and the second control terminal be respectively the second transistor Q3 collector,
Emitter and base stage, bidirectional conduction is also associated between the control terminal of first crystal triode Q1 and the second transistor Q3
Diode D8, D10, resistance R3, R4, R5, R95.
In normal work, the first control terminal and the second control terminal are high level, and IGBT circuits are in the conduction state, work as friendship
When galvanic electricity net is in positive half cycle, first crystal triode Q1 and the second diode current flow D2, realize energy from input power grid end to
Output loading end is transmitted, and when alternating current is in negative half period, the second transistor Q3 and the first diode current flow D1, realize energy
Amount is transmitted from input power grid end to output loading end.
As shown in Figures 2 and 3, sample circuit 2 includes the 3rd diode D6 and the 4th diode D7, the 3rd diode D6 bags
Include includes with the first cathode the 3rd cathode being connected and the third anode being connected with microprocessing unit 3, the 4th diode D7
The 4th cathode being connected with second cathode and the 4th anode being connected with microprocessing unit 3, sample circuit 2 is through the three or two pole
Pipe D6 obtains the first sampled voltage, obtains the second sampled voltage through the 4th diode D7.In normal work, the 3rd diode D6
It is in the state of cut-off with the 4th diode D7, i.e. the first sampled voltage and the second sampled voltage are zero or relatively low, so as to keep
Less than the state of preset reference magnitude of voltage, when a short circuit occurs, the 3rd diode D6 and the 4th diode D7 are breakdown, and first adopts
Sample voltage or the second sampled voltage are rapidly increased to more than preset reference magnitude of voltage.
Microprocessing unit 3 includes：Comparable chip 31, is connected with sample circuit 2, has a preset reference magnitude of voltage, is used for
First sampled voltage and the second sampled voltage are compared with preset reference magnitude of voltage and generate command signal, comparable chip 31
Select model TLV3501；And micro-chip processor 32, be connected with comparable chip 31, for being handled command signal,
And output control signal when any one is more than preset reference magnitude of voltage in the first sampled voltage and the second sampled voltage.
Specifically, the 3rd cathode of the 3rd diode D6 and the 4th cathode of the 4th diode D7 connect an afterflow two respectively
One end after pole pipe with resistance R28 is connected, and resistance R28 is connected with No. 3 ports of comparable chip 31, and other end ground connection, compares
No. 2 ports of chip 31 are grounded after being connected with capacitance C30, and preset reference magnitude of voltage V_ref1 is issued by micro-chip processor 32, than
No. 6 ports compared with chip 31 are connected with the OFF signal receiving port of micro-chip processor 32.
By comparable chip 31 by the first sampled voltage and the second sampled voltage compared with preset reference magnitude of voltage, and according to
Send to micro-chip processor 32 according to comparative result generation command signal, then handled by micro-chip processor 32, i.e. generation control
Signal.
As shown in Figure 2 and Figure 4, drive circuit 4 includes：Driving chip 41, is connected with micro-chip processor 32, with according to control
Signal switch-off power circuit 1, driving chip 41 select model HCPL-316J；And on-off circuit 42, including：3rd crystal
Triode Q6 and the 4th transistor Q7, the 3rd transistor Q6 include：3rd input terminal, the 3rd output terminal and the 3rd control
End processed, the 3rd input terminal are connected with the high-potential output end of driving chip 41, the 3rd control terminal and the output terminal of driving chip 41
It is connected, the 4th transistor Q7 includes：4th input terminal, the 4th output terminal and the 4th control terminal, the 4th output terminal and driving
The low potential output terminal of chip 41 is connected, and the 4th control terminal is connected with the output terminal of driving chip 41, and the 4th input terminal the 3rd is defeated
Outlet is connected, and the 3rd output terminal and the 4th input terminal are connected with the first control terminal and the second control terminal.
Collector, the hair that it is respectively the 3rd transistor Q6 that 3rd input terminal, the 3rd output terminal and the 3rd control terminal, which are,
Emitter-base bandgap grading and base stage, the 4th input terminal, the 4th output terminal and the 4th control terminal be respectively the 4th transistor Q6 collector,
Emitter and base stage, the 3rd control terminal are connected to the 11 of driving chip 41 after being connected with the 4th control terminal with resistance R21 one end
Number port, the IGBT_CTRL signal output parts of micro-chip processor 32 are connected with No. 1 port of driving chip 41.
After control signal is sent to driving chip 41, the output terminal output low level signal of driving chip 41, the 3rd crystal
Triode Q6 and the 4th transistor Q7 are off state so that the first control terminal and the second control terminal be also at it is low
Level state, IGBT circuits are disconnected.
As shown in Figure 1, breaker further includes sampling display unit, sampling display unit includes：Connect with micro-chip processor 32
Voltage acquisition module connect, for obtaining real-time voltage value in power supply grid；It is being connected with micro-chip processor 32, for obtaining
The current acquisition module of real-time current value in power supply grid；And it is being connected with micro-chip processor 32, for showing real-time voltage
The display 53 of value and real-time current value, display 53 include liquid crystal display and/or LED display, are selected in the present embodiment
Liquid crystal display.
Specifically, voltage acquisition module includes：The Hall voltage sensor being connected between the firewire of power grid and zero curve
511, and, it is connected with Hall voltage sensor 511, for adjusting input voltage to 32 operating voltage range of micro-chip processor
Interior voltage-regulating circuit 512, voltage-regulating circuit 512 include regulator circuit and/or reduction voltage circuit.
Current acquisition module includes：The Hall current sensor 521 of the zero curve of power grid is connected to, and, with Hall current
Sensor 521 is used to adjust input current to the matrix current adjustment circuit 522 in 32 current margin of micro-chip processor, electric current
Adjustment circuit 522 includes rectification circuit and/or filter circuit.
Voltage in power grid is delivered to micro- after being adjusted after the collection of Hall voltage sensor 511 by voltage-regulating circuit 512
Process chip 32, and shown by display 53, similarly, the electric current in power grid is after the collection of Hall current sensor 521
Micro-chip processor 32 is delivered to after being adjusted by matrix current adjustment circuit 522, and is shown by display 53；Pass through the reality to power grid
When magnitude of voltage and real-time current value shown, and judge whether zero crossing, electric current are in overload to voltage in time, side
Just user is monitored in real time.
Meanwhile in short circuit, driving chip 41 produces short circuit fault signal IGBT_Error and is sent by No. 6 ports to micro-
Chip 32 is managed, the IGBT_Error receiver ports of micro-chip processor 32 receive fault-signal, and are carried out by display 53
Display.
As shown in Fig. 2, micro-chip processor 32 is also associated with input equipment 6, input equipment 6 includes keyboard and/button, passes through
The convenient setting for carrying out parameter of input equipment 6 and switching on and shutting down operation, detailed process are：Micro-chip processor 32 receives input equipment 6
Instruction, carry out short circuit current flow setting, switching on and shutting down judgement, failure reset etc.；During start, micro-chip processor 32 issues IGBT switches
Machine instructs IGBT_CTRL, if micro-chip processor 32 receives the power-on instruction that input equipment 6 is sent, 32 meeting of micro-chip processor
First determine whether the zero crossing of network voltage, power-on instruction can issue driving chip 41 in zero crossing, realize power up function；Similarly,
If micro-chip processor 32 receives the shutdown command that input equipment 6 is sent, micro-chip processor 32 can first determine whether network voltage
Zero crossing, shutdown command can issue driving chip 41 in zero crossing, realize shut-off function.
During work, sample circuit 2 samples the voltage in power grid, and by microprocessing unit 3 that first sampling is electric
Pressure and the second sampled voltage are compared with preset reference magnitude of voltage, when a short circuit occurs, the first sampled voltage or the second sampling
Voltage is increased to more than preset reference magnitude of voltage, microprocessing unit 3 and generation control signal control IGBT circuit shut-offs, is played short
The effect of road protection, since whole control process is via sampling, control and IGBT cooperative achievements so that the short-circuit protection response time
30-50 μ s are maintained at, therefore response is rapider, reduces security incident odds.
Correspondingly, the present embodiment also provides a kind of short-circuit protection method, this method is based on above-mentioned breaker, as shown in figure 5,
Including：
701, obtain second sampled voltage of first sampled voltage, alternating current of the alternating current in positive half cycle in negative half period, with
And real-time voltage value and real-time current value in power supply grid；
702, the first sampled voltage and the second sampled voltage are compared with a preset reference magnitude of voltage, and in the first sampled voltage
Output control signal when being more than preset reference magnitude of voltage with any one in the second sampled voltage, and by display 53 to institute
State real-time voltage value and real-time current value is shown；
703, disconnected according to the power circuit 1 between control signal control input power grid end and output loading end.
The collection of the first sampled voltage and the second sampled voltage is carried out respectively in the positive half cycle and negative half period of alternating current, by
One sampled voltage and the second sampled voltage are compared with preset reference magnitude of voltage, when a short circuit occurs, the first sampled voltage or
Second sampled voltage can raise and be more than preset reference magnitude of voltage, and rapid switch-off power circuit 1, realizes circuit protection at this time
Effect, and respond rapidly, reduce security incident odds；At the same time by gather the real-time voltage value in power supply grid and
Real-time current value, and shown by display 53, so that convenient monitor the voltage and current in power grid in real time.
In the above-described embodiments, the description to each embodiment emphasizes particularly on different fields, and does not have the part being described in detail in some embodiment,
It may refer to the associated description of other embodiment.
It should be noted that for foregoing each method embodiment, in order to be briefly described, therefore it is all expressed as a series of
Combination of actions, but those skilled in the art should know, the present invention and from the limitation of described sequence of movement because
According to the present invention, some steps may use other orders or be carried out at the same time.Secondly, those skilled in the art should also know
Know, embodiment described in this description belongs to preferred embodiment, the action being related to and module not necessarily this hair
Necessary to bright.
In several embodiments provided herein, it should be understood that disclosed device, can be real in other way
It is existing.For example, device embodiment described above is only schematical, such as the division of said units, it is only that one kind is patrolled
The division of volume function, can there is an other dividing mode when actually realizing, such as multiple units or component can combine or can be with
Another system is integrated into, or some features can be ignored, or do not perform.It is another, it is shown or discussed mutual
Coupling or communication connection can be INDIRECT COUPLING or communication connection between device or unit by some interfaces, can be electricity
Letter or other forms.
The above-mentioned unit illustrated as separating component may or may not be physically separate, be shown as unit
The component shown may or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
In network unit.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, and without limiting it；Although reference
The present invention will be described in detail for previous embodiment, it will be understood by those of ordinary skill in the art that：It still can be to preceding
State the technical solution described in each embodiment to modify, or equivalent substitution is carried out to which part technical characteristic；And these
Modification is replaced, and the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical solution.
Claims (10)
- A kind of 1. single-phase arc extinguishing type breaker with real-time monitoring and control, it is characterised in that including：Power circuit (1), including：The IGBT circuits being connected between input power grid end and output loading end, for control input The break-make of power grid between power grid end and output loading end；Sample circuit (2), for being sampled to the positive half cycle voltage between the input power grid end and the output loading end And the first sampled voltage is obtained, the negative half period voltage between the input power grid end and the output loading end is sampled simultaneously Obtain the second sampled voltage；Microprocessing unit (3), it is pre- for the first sampled voltage for obtaining the sample circuit (2) or the second sampled voltage and one If reference voltage value is compared, and is more than the preset reference magnitude of voltage in first sampled voltage or the second sampled voltage When export a control signal；Drive circuit (4), for controlling the power circuit (1) to disconnect according to the control signal；AndDisplay unit is sampled, is shown for carrying out sampling to the real-time voltage value in power grid and real-time current value；Wherein, the sampling display unit includes：Voltage acquisition module be connected with the microprocessing unit (3), for obtaining real-time voltage value in power supply grid；Current acquisition module be connected with the microprocessing unit (3), for obtaining real-time current value in power supply grid；With AndDisplay be connected with the microprocessing unit (3), for showing the real-time voltage value and the real-time current value (53)。
- 2. the single-phase arc extinguishing type breaker according to claim 1 with real-time monitoring and control, it is characterised in that described IGBT circuits include：First crystal triode, including：First input end, the first output terminal and the first control terminal, the first input end connection To input power grid end；Second transistor, including：Second input terminal, the second output terminal and the second control terminal, the second input terminal connection To output loading end, second output terminal is connected with the first output, and second control terminal is connected with the first control terminal；First diode, including the first anode and the first cathode, the first anode connection first output terminal, described first Cathode is connected to first input end；AndSecond diode, including second plate and the second cathode, the second plate are connected to the second output terminal, and described second is cloudy Pole is connected to the second input terminal.
- 3. the single-phase arc extinguishing type breaker according to claim 2 with real-time monitoring and control, it is characterised in that described to adopt Sample circuit (2) includes the 3rd diode and the 4th diode, the 3rd diode include being connected with first cathode the Three cathodes and the third anode being connected with the microprocessing unit (3), the 4th diode include and the second cathode phase The 4th cathode even and the 4th anode being connected with the microprocessing unit (3), the sample circuit (2) is through the three or two pole Pipe obtains the first sampled voltage, obtains the second sampled voltage through the 4th diode.
- 4. the single-phase arc extinguishing type breaker according to claim 3 with real-time monitoring and control, it is characterised in that described micro- Processing unit (3) includes：Comparable chip (31), is connected with the sample circuit (2), has a preset reference magnitude of voltage, for described first to be adopted Sample voltage and the second sampled voltage are compared with the preset reference magnitude of voltage and generate command signal；AndMicro-chip processor (32), is connected with the comparable chip (31), for being handled and described instruction signal described Any one in first sampled voltage and second sampled voltage exports the control when being more than the preset reference magnitude of voltage Signal, the sampling display unit are connected to the micro-chip processor (32).
- 5. the single-phase arc extinguishing type breaker according to claim 4 with real-time monitoring and control, it is characterised in that the drive Dynamic circuit (4) includes：Driving chip (41), is connected with the micro-chip processor (32), turns off the power circuit with according to the control signal (1)；AndOn-off circuit (42), including：3rd transistor and the 4th transistor, the 3rd transistor include： 3rd input terminal, the 3rd output terminal and the 3rd control terminal, the high potential of the 3rd input terminal and the driving chip (41) are defeated Outlet is connected, and the 3rd control terminal is connected with the output terminal of the driving chip (41), and the 4th transistor includes： 4th input terminal, the 4th output terminal and the 4th control terminal, the low potential of the 4th output terminal and the driving chip (41) are defeated Outlet is connected, and the 4th control terminal is connected with the output terminal of the driving chip (41), the 3rd described in the 4th input terminal Output terminal is connected, and the 3rd output terminal and the 4th input terminal are connected with the first control terminal and the second control terminal.
- 6. the single-phase arc extinguishing type breaker according to claim 5 with real-time monitoring and control, it is characterised in that the electricity Pressure acquisition module includes：The Hall voltage sensor (511) being connected between the firewire of power grid and zero curve, and, with it is described suddenly You are connected, for adjusting input voltage to the micro-chip processor (32) operating voltage range at voltage sensor (511) Voltage-regulating circuit (512).
- 7. the single-phase arc extinguishing type breaker according to claim 5 with real-time monitoring and control, it is characterised in that the electricity Stream acquisition module includes：The Hall current sensor (521) of the zero curve of power grid is connected to, and, sensed with the Hall current Device (521) is used to adjust input current to the matrix current adjustment circuit in the micro-chip processor (32) current margin (522)。
- 8. the single-phase arc extinguishing type breaker according to claim 5 with real-time monitoring and control, it is characterised in that described aobvious Show that device (53) includes liquid crystal display and/or LED display；The voltage-regulating circuit (512) includes regulator circuit and/or drop Volt circuit；The matrix current adjustment circuit (522) includes rectification circuit and/or filter circuit.
- 9. the single-phase arc extinguishing type breaker according to claim 5 with real-time monitoring and control, it is characterised in that described micro- Process chip (32) is also associated with input equipment (6), and the input equipment (6) includes button.
- 10. a kind of short-circuit protection method, it is characterised in that the method is based on the open circuit any one of claim 1 to 9 Device, including：Obtain second sampled voltage and confession of first sampled voltage, alternating current of the alternating current in positive half cycle in negative half period Real-time voltage value and real-time current value in power grid；First sampled voltage and second sampled voltage are compared with a preset reference magnitude of voltage, and described first Any one in sampled voltage and second sampled voltage exports the control signal when being more than the preset reference magnitude of voltage, And by display to described（53）The real-time voltage value and the real-time current value are shown；Disconnected according to the power circuit (1) between the control signal control input power grid end and output loading end.
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| CN201810055908.0A CN107994555B (en) | 2018-01-20 | 2018-01-20 | Single-phase arc extinguishing type breaker and short-circuit protection method with real-time monitoring and control |
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| CN201810055908.0A CN107994555B (en) | 2018-01-20 | 2018-01-20 | Single-phase arc extinguishing type breaker and short-circuit protection method with real-time monitoring and control |
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| CN107994555B CN107994555B (en) | 2019-06-21 |
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| CN107994555B (en) | 2019-06-21 |
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