CN110492457A - A kind of arc-suppressing method and arc-control device based on DC circuit - Google Patents
A kind of arc-suppressing method and arc-control device based on DC circuit Download PDFInfo
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- CN110492457A CN110492457A CN201910562121.8A CN201910562121A CN110492457A CN 110492457 A CN110492457 A CN 110492457A CN 201910562121 A CN201910562121 A CN 201910562121A CN 110492457 A CN110492457 A CN 110492457A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The embodiment of the invention discloses a kind of arc-suppressing method and arc-control device based on DC circuit avoids destruction caused by electric arc sparking for short circuit current can be down to milliampere grade using big resistance value and by fever consumption.The method is applied to DC circuit, and the DC circuit includes resistance, capacitor, power supply, the method comprise the steps that detecting the energized state of capacitor after resistance, capacitor and power supply are connected in series to form first closed loop；It by the energized state of capacitor, determines that DC circuit forms transient state short circuit, passes through capacitor in transient state short circuit short circuit currents, the short circuit current in transient state short circuit is DC positive and negative anodes transcient short circuit time, the periodic component electric current of the short circuit current comprising excitation winding effect；The short circuit current in transient state short circuit is reduced to micro-current by resistance, externally the short-circuit electricity of heat dissipation consumption short circuit current, micro-current are the electric current less than preset threshold value；When pressure difference discharges between connection terminal, connecting wire completes closed loop, and pressure difference includes the voltage difference of the two ends of resistance between connection terminal.
Description
Technical field
The present invention relates to circuit field more particularly to a kind of arc-suppressing methods and arc-control device based on DC circuit.
Background technique
In uninterruptible power system, connect after forming high direct voltage after battery series connection by dc switch or fuse
Enter host, usually large-scale UPS and HVDC system dc voltage is up to DC540V.Due to the direct current plate of dc switch and host
Upper to contain monitoring capacitor, the blocking properties of flow of capacitor causes the high voltage short circuit for occurring of short duration when DC loop closed loop, unavoidably
Appearance Arcing phenomenon, capacitance is bigger, and Arcing is more serious, or even occurs burning terminal burn maintenance personnel's
Accident.
During actual O&M, it is also the most frequent DC line closed loop work of operation that replacement battery, which is most common,
Sequence.Capacitor electric discharge after fail battery is removed on switch restores power loss stable state, then when accessing new battery and connecting the last one terminal,
Capacitor in switch obtains the short-circuit transient state of electric appearance, and battery terminal contact point moment generates great short circuit current, to cause to draw
Fox sparking.
The DC line closed-loop policy of mainstream mainly has at present:
1, arc extinguishing measure is not taken, and operator wears fire-retardant gloves and safety goggles, pressure difference between multimeter measurement terminal
It directly meets and discusses afterwards and completes closed loop.
Advantage: operating cost is minimum, is the common method of current construction team.
Disadvantage: rear end can not be confirmed with the presence or absence of real short circuit, accident rate highest is past because of no trip-point after breaking down
Toward cause the accident influence expand, often occur because draw fox sparking cause terminal burn or personnel burn the case where.
2, low capacity switch is sealed in, completes to complete short-circuit transient state to insulation stable state to the detection capacitor in main switch after closing a floodgate
Conversion, connecting wire completes closed loop after pressure difference between connection terminal is released, and then switchs separating brake and removes concatenated low capacity
Switch.
Advantage: having trip protection ability, and using effect is preferable in low capacity detection capacitor.
Disadvantage: can not confirm rear end with the presence or absence of real short circuit, and installation procedure is cumbersome, and rear end is the direct current plate of host
Shi Yinwei capacitor is larger, and low capacity switch is be easy to cause to burn.
Summary of the invention
The embodiment of the invention provides a kind of arc-suppressing method and arc-control device based on DC circuit, for being replaced using resistance
The first secondary line closure is completed for conducting wire, it then follows short circuit current can be down to milliampere grade and pass through fever by Ohm's law, big resistance value
Consumption avoids destruction caused by electric arc sparking.
In view of this, first aspect present invention provides a kind of arc-suppressing method based on DC circuit, the method application
In DC circuit, the DC circuit includes resistance, capacitor, power supply, which is characterized in that the described method includes:
After the resistance, the capacitor and the power supply are connected in series to form first closed loop, the logical of the capacitor is detected
Electricity condition；
By the energized state of the capacitor, determine that the DC circuit forms transient state short circuit, in the transient state short circuit
Short circuit current passes through the capacitor, and it includes excitation winding that the short circuit current in the transient state short circuit, which is DC positive and negative anodes transcient short circuit time,
The periodic component electric current of the short circuit current of effect；
The short circuit current in the transient state short circuit is reduced to micro-current by the resistance, externally heat dissipation consumes the short circuit
The short-circuit electricity of electric current, the micro-current are the electric current less than preset threshold value；
When pressure difference discharges between connection terminal, connecting wire completes closed loop, and pressure difference includes the electricity between the connection terminal
The voltage difference of the two ends of resistance.
Optionally, in some embodiments of the invention, the resistance is heating resistor, and the resistance value of the resistance is greater than pre-
Set threshold value.
Optionally, in some embodiments of the invention, the method also includes:
When pressure difference does not discharge between the connection terminal, determine that there are real short circuits, disconnect the resistance and the capacitor
With the connecting line of the power supply, short dot is checked.
Optionally, in some embodiments of the invention, the heating resistor includes electric iron.
Optionally, in some embodiments of the invention, the method also includes:
There are a cut-off points after the power supply completes series connection, are equal to institute using pressure difference between multimeter measuring connection terminal
When stating the series voltage of power supply, the cut-off point is contacted respectively with the L line of the electric iron and N line and is detected, while described in use
Pressure difference between multimeter measuring connection terminal is incorporated to connecting wire after pressure difference between the measuring connection terminal is reduced to zero, completes straight
Flow Line closed loop.
Second aspect of the present invention provides a kind of arc-control device, and the arc-control device is applied to DC circuit, the direct current
Road includes resistance, capacitor, power supply, which is characterized in that the arc-control device includes:
Detection module, for detecting after the resistance, the capacitor and the power supply are connected in series to form first closed loop
The energized state of the capacitor；
Processing module determines that the DC circuit forms transient state short circuit, in institute for the energized state by the capacitor
It states transient state short circuit short circuit currents and passes through the capacitor, the short circuit current in the transient state short circuit is DC positive and negative anodes transcient short circuit time,
The periodic component electric current of short circuit current comprising excitation winding effect；It is by the resistance that the short circuit in the transient state short circuit is electric
Stream is reduced to micro-current, and externally heat dissipation consumes the short-circuit electricity of the short circuit current, and the micro-current is the electricity less than preset threshold value
Stream；When pressure difference discharges between connection terminal, connecting wire completes closed loop, and pressure difference includes the two of the resistance between the connection terminal
Hold voltage difference.
Optionally, in some embodiments of the invention,
The resistance is heating resistor, and the resistance value of the resistance is greater than preset threshold value.
Optionally, in some embodiments of the invention,
The detection module is also used to disconnect the resistance and the electricity when pressure difference does not discharge between the connection terminal
Hold the connecting line with the power supply, checks short dot.
Optionally, in some embodiments of the invention,
The heating resistor includes electric iron
Optionally, in some embodiments of the invention,
The processing module is also used to measure there are a cut-off point using multimeter after the power supply completes series connection
When pressure difference is equal to the series voltage of the power supply between connection terminal, the disconnection is contacted respectively with the L line of the electric iron and N line
Point detection, while using pressure difference between the multimeter measuring connection terminal, after pressure difference is reduced to zero between the measuring connection terminal
It is incorporated to connecting wire, completes DC line closed loop.
Third aspect present invention provides a kind of readable storage medium storing program for executing, is stored thereon with computer program, the computer journey
It realizes as described in first aspect present invention and any optional implementation of first aspect when sequence is executed by processor based on resistance
The step of holding the DC circuit arc-suppressing method of characteristic.
As can be seen from the above technical solutions, the embodiment of the present invention has the advantage that
In embodiments of the present invention, the method is applied to DC circuit, and the DC circuit includes including resistance, electricity
Hold, power supply, the method comprise the steps that when the resistance, the capacitor are connected in series to form with the power supply and close for the first time
After ring, the energized state of the capacitor is detected；By the energized state of the capacitor, it is short to determine that the DC circuit forms transient state
The capacitor is passed through in the transient state short circuit short circuit currents in road, and the short circuit current in the transient state short circuit is that DC is positive and negative extremely short
Road moment, the periodic component electric current of the short circuit current comprising excitation winding effect；It will be in the transient state short circuit by the resistance
Short circuit current be reduced to micro-current, externally heat dissipation consumes the short-circuit electricity of the short circuit current, and the micro-current is less than preset
The electric current of threshold value；When pressure difference discharges between connection terminal, connecting wire completes closed loop, and pressure difference includes described between the connection terminal
The voltage difference of the two ends of resistance.Resistance substitution conducting wire is utilized to complete the first secondary line closure, it then follows Ohm's law, big resistance value can will be short
Road electric current is down to milliampere grade and by fever consumption, avoids destruction caused by electric arc sparking.
Detailed description of the invention
Technical solution in order to illustrate the embodiments of the present invention more clearly, below will be to institute in embodiment and description of the prior art
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the schematic diagram of DC circuit open circuit in the embodiment of the present invention；
Fig. 2 is the equivalent schematic of DC circuit energization moment in the embodiment of the present invention；
Fig. 3 is the equivalent schematic that heating resistor is sealed in the embodiment of the present invention；
Fig. 4 is the equivalent schematic of series circuit closed loop in the embodiment of the present invention；
Fig. 5 is one embodiment schematic diagram of the arc-suppressing method based on DC circuit in the embodiment of the present invention；
Fig. 6 is one embodiment schematic diagram of arc-control device in the embodiment of the present invention.
Specific embodiment
The embodiment of the invention provides a kind of arc-suppressing method and arc-control device based on DC circuit, for being replaced using resistance
The first secondary line closure is completed for conducting wire, it then follows short circuit current can be down to milliampere grade and pass through fever by Ohm's law, big resistance value
Consumption avoids destruction caused by electric arc sparking.
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical solution in the embodiment of the present invention are described, it is clear that described embodiment is only present invention a part
Embodiment, instead of all the embodiments.Based on the embodiments of the present invention, it should fall within the scope of the present invention.
In DC line concatenation process, because electric arc can occur when being closed the last one cut-off point there are capacitor in route
Sparking, electric arc size are influenced by capacitance.
This patent method is completed the first secondary line using the heating resistor substitution conducting wire of large capacity and is closed, it then follows Ohm's law
Short circuit current can be down to milliampere grade and by fever consumption by I=U/R, big resistance value, avoid destruction caused by electric arc sparking.
As shown in Figure 1, for the schematic diagram of DC circuit open circuit in the embodiment of the present invention.As shown in Fig. 2, implementing for the present invention
The equivalent schematic of DC circuit energization moment in example.
For capacitor, in the energization moment of zero state response, it can assume that be the voltage source that voltage is zero, so it
It is equivalent to short circuit.
The charging of capacitor is divided into two parts, and a part is the transient process of transient state, and another part is steady-state process.So-called electricity
Hold stopping direct current, refers to its steady-state characteristic in fact.In the steady state, the equivalent resistance of capacitor is infinity, and DC current can not
It is zero by it, therefore by capacitance current, most only minimum leakage current.
In transient state, capacitor can be by electric current, wherein carving at the beginning, electric current is because capacitor is approximately electricity
Potential source, its feature is almost short circuit, therefore the initial value of electric current is maximum.
Below by way of examples, technical solution of the present invention is described further, as shown in figure 5, for the present invention
One embodiment schematic diagram of arc-suppressing method in embodiment based on DC circuit may include:
501, after the resistance, the capacitor and the power supply are connected in series to form first closed loop, the capacitor is detected
Energized state.
It should be noted that the method is applied to DC circuit, the DC circuit includes resistance, capacitor, power supply.It can
Choosing, the resistance is heating resistor, and the resistance value of the resistance is greater than preset threshold value.
After the resistance, the capacitor and the power supply are connected in series to form first closed loop, the logical of the capacitor is detected
Electricity condition.
Function of short circuit detection: heating resistor replaces conducting wire to complete first closed loop, if rear end is there are real short circuit at this time, etc.
It imitates in the DC circuit that heating resistor is sealed in DC540V, pressure drop does not discharge between multimeter measures terminal, has determined that rear end at this time
There are real short circuits, should disconnect heating resistor connection ray examination short dot immediately.
502, by the energized state of the capacitor, determine that the DC circuit forms transient state short circuit.
Pass through the capacitor in the transient state short circuit short circuit currents, the short circuit current in the transient state short circuit is that DC is positive and negative
Pole transcient short circuit time, the periodic component electric current of the short circuit current comprising excitation winding effect.
503, the short circuit current in the transient state short circuit is reduced to by micro-current by the resistance, externally described in heat dissipation consumption
The short-circuit electricity of short circuit current.
The micro-current is the electric current less than preset threshold value, by the resistance by the short circuit current in transient state short circuit
It is reduced to micro-current, externally heat dissipation consumes short-circuit electricity.
In embodiments of the present invention, the short circuit current in the transient state short circuit is reduced to by micro-current by the resistance, it is right
Outer heat dissipation consumes short-circuit electricity.It completes the first secondary line using the heating resistor substitution conducting wire of large capacity to be closed, it then follows ohm
Short circuit current can be down to milliampere grade and by fever consumption, avoided and break caused by electric arc sparking by law I=U/R, big resistance value
It is bad.
504, when pressure difference discharges between connection terminal, connecting wire completes closed loop.
Optionally, when pressure difference does not discharge between the connection terminal, determine that there are real short circuits, disconnect the resistance and institute
The connecting line of capacitor and the power supply is stated, checks short dot.
Optionally, it is pressed there are a cut-off point using between multimeter measuring connection terminal after the power supply completes series connection
When difference is equal to the series voltage of the power supply, the cut-off point is contacted respectively with the L line of the electric iron and N line and is detected, simultaneously
Using pressure difference between the multimeter measuring connection terminal, connection is incorporated to after pressure difference between the measuring connection terminal is reduced to zero and is led
Line completes DC line closed loop.
The embodiment of the present invention extends the feasibility analysis of capacitor transient state transition using heating resistor.Wherein, arc extinguishing acts on: using
The heating resistor of large capacity replaces conducting wire to complete first closed loop, detect at this time capacitor obtain it is electric after form transient state short circuit, large capacity electricity
Short circuit current can be reduced to the micro-current without sparking state by resistance, and heating resistor consumes short-circuit electricity by externally heat dissipation moment, to
Pressure difference is released rear connecting wire and completes closed loop between connection terminal, and entire connection procedure generates (such as Fig. 3, Fig. 4 without drawing fox sparking
Imitate circuit).
Illustratively, as shown in figure 3, to seal in the equivalent schematic of heating resistor in the embodiment of the present invention.Such as Fig. 4 institute
Show, is the equivalent schematic of series circuit closed loop in the embodiment of the present invention.
The practical application of DC circuit arc-suppressing method based on capacitance-resistance characteristic: in practical applications, electric iron is good
Heating resistor substitute, should be there are a cut-off point after whole group battery completes series connection, pressure difference Ying Ji between multimeter measurement terminal
This is equal to the series voltage of whole group battery, contacts cut-off point detection respectively with the L line of electric iron and N line, while being surveyed with multimeter
Pressure difference between amount terminal, is incorporated to connecting wire after pressure difference is reduced to zero, completes DC line closed loop.
In embodiments of the present invention, the method is applied to DC circuit, and the DC circuit includes resistance, capacitor, electricity
Source, the method comprise the steps that after the resistance, the capacitor and the power supply are connected in series to form first closed loop,
Detect the energized state of the capacitor；By the energized state of the capacitor, determine that the DC circuit forms transient state short circuit, In
The transient state short circuit short circuit currents pass through the capacitor, and the short circuit current in the transient state short circuit is DC positive and negative anodes short-circuit wink
Between, the periodic component electric current of the short circuit current comprising excitation winding effect；It will be short in the transient state short circuit by the resistance
Road electric current is reduced to micro-current, and externally heat dissipation consumes the short-circuit electricity of the short circuit current, and the micro-current is less than preset threshold value
Electric current；When pressure difference discharges between connection terminal, connecting wire completes closed loop, and pressure difference includes the resistance between the connection terminal
Voltage difference of the two ends.It completes the first secondary line using resistance substitution conducting wire to be closed, it then follows Ohm's law, big resistance value can be by short-circuit electricity
Stream is down to milliampere grade and by fever consumption, avoids destruction caused by electric arc sparking.
As shown in fig. 6, for one embodiment schematic diagram of arc-control device in the embodiment of the present invention.The arc-control device application
In DC circuit, the DC circuit includes resistance, capacitor, power supply, which is characterized in that the arc-control device includes:
Detection module 601 is used for while using pressure difference between the multimeter measuring connection terminal, to the measurement connecting pin
It is incorporated to connecting wire after pressure difference is reduced to zero between son, completes DC line closed loop.
Processing module 602 determines that the DC circuit forms transient state short circuit for the energized state by the capacitor,
Pass through the capacitor in the transient state short circuit short circuit currents, the short circuit current in the transient state short circuit is DC positive and negative anodes short-circuit wink
Between, the periodic component electric current of the short circuit current comprising excitation winding effect；It will be short in the transient state short circuit by the resistance
Road electric current is reduced to micro-current, and externally heat dissipation consumes the short-circuit electricity of the short circuit current, and the micro-current is less than preset threshold value
Electric current；When pressure difference discharges between connection terminal, connecting wire completes closed loop, and pressure difference includes the resistance between the connection terminal
Voltage difference of the two ends.
Optionally, in some embodiments of the invention, the resistance is heating resistor, and the resistance value of the resistance is greater than pre-
Set threshold value；The heating resistor includes electric iron.
Optionally, in some embodiments of the invention,
Detection module 601 is also used to disconnect the resistance and the capacitor when pressure difference does not discharge between the connection terminal
With the connecting line of the power supply, short dot is checked.
Optionally, in some embodiments of the invention,
Processing module 602 is also used to after the power supply is completed to connect use multimeter measurement company there are a cut-off point
When pressure difference is equal to the series voltage of the power supply between connecting terminal, the cut-off point is contacted respectively with the L line of the electric iron and N line
Detection, while using pressure difference between the multimeter measuring connection terminal, after pressure difference between the measuring connection terminal is reduced to zero simultaneously
Enter connecting wire, completes DC line closed loop.
In the above-described embodiments, can come wholly or partly by software, hardware, firmware or any combination thereof real
It is existing.When implemented in software, it can entirely or partly realize in the form of a computer program product.
The computer program product includes one or more computer instructions.Load and execute on computers the meter
When calculation machine program instruction, entirely or partly generate according to process or function described in the embodiment of the present invention.The computer can
To be general purpose computer, special purpose computer, computer network or other programmable devices.The computer instruction can be deposited
Storage in a computer-readable storage medium, or from a computer readable storage medium to another computer readable storage medium
Transmission, for example, the computer instruction can pass through wired (example from a web-site, computer, server or data center
Such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (such as infrared, wireless, microwave) mode to another website
Website, computer, server or data center are transmitted.The computer readable storage medium can be computer and can deposit
Any usable medium of storage either includes that the data storages such as one or more usable mediums integrated server, data center are set
It is standby.The usable medium can be magnetic medium, (for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or partly lead
Body medium (such as solid state hard disk Solid State Disk (SSD)) etc..
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided by the present invention, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit
It closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the present invention
Portion or part steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to before
Stating embodiment, invention is explained in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of arc-suppressing method based on DC circuit, the method is applied to DC circuit, the DC circuit include resistance,
Capacitor, power supply, which is characterized in that the described method includes:
After the resistance, the capacitor and the power supply are connected in series to form first closed loop, the energization shape of the capacitor is detected
State；
By the energized state of the capacitor, determine that the DC circuit forms transient state short circuit, the short circuit in the transient state short circuit
Electric current passes through the capacitor, and the short circuit current in the transient state short circuit is DC positive and negative anodes transcient short circuit time, acts on comprising excitation winding
Short circuit current periodic component electric current；
The short circuit current in the transient state short circuit is reduced to micro-current by the resistance, externally heat dissipation consumes the short circuit current
Short-circuit electricity, the micro-current be less than preset threshold value electric current；
When pressure difference discharges between connection terminal, connecting wire completes closed loop, and pressure difference includes the resistance between the connection terminal
Voltage difference of the two ends.
2. the resistance value of the resistance is big the method according to claim 1, wherein the resistance is heating resistor
In preset threshold value.
3. method according to claim 1 or 2, which is characterized in that the method also includes:
When pressure difference does not discharge between the connection terminal, determine that there are real short circuits, disconnect the resistance and the capacitor and institute
The connecting line of power supply is stated, checks short dot.
4. according to the method described in claim 2, it is characterized in that, the heating resistor includes electric iron.
5. according to the method described in claim 4, it is characterized in that, the method also includes:
There are a cut-off points after the power supply completes series connection, are equal to the electricity using pressure difference between multimeter measuring connection terminal
When the series voltage in source, the cut-off point is contacted respectively with the L line of the electric iron and N line and is detected, while using the general-purpose
Pressure difference between table measuring connection terminal is incorporated to connecting wire after pressure difference between the measuring connection terminal is reduced to zero, completes AC line
Road closed loop.
6. a kind of arc-control device, the arc-control device is applied to DC circuit, and the DC circuit includes resistance, capacitor, power supply,
It is characterized in that, the arc-control device includes:
Detection module, for after the resistance, the capacitor and the power supply are connected in series to form first closed loop, described in detection
The energized state of capacitor；
Processing module determines that the DC circuit forms transient state short circuit, described temporary for the energized state by the capacitor
State short circuit short circuit currents pass through the capacitor, and the short circuit current in the transient state short circuit is DC positive and negative anodes transcient short circuit time, include
The periodic component electric current of the short circuit current of excitation winding effect；The short circuit current in the transient state short circuit is dropped by the resistance
For micro-current, externally heat dissipation consumes the short-circuit electricity of the short circuit current, and the micro-current is the electric current less than preset threshold value；When
When pressure difference discharges between connection terminal, connecting wire completes closed loop, and pressure difference includes the both ends electricity of the resistance between the connection terminal
Pressure difference.
7. arc-control device according to claim 6, which is characterized in that the resistance is heating resistor, the resistance of the resistance
Value is greater than preset threshold value；The heating resistor includes electric iron.
8. arc-control device according to claim 6 or 7, which is characterized in that
The detection module is also used to when pressure difference does not discharge between the connection terminal, disconnect the resistance and the capacitor and
The connecting line of the power supply checks short dot.
9. arc-control device according to claim 7, which is characterized in that
The processing module is also used to after the power supply is completed to connect use multimeter measurement connection there are a cut-off point
When pressure difference is equal to the series voltage of the power supply between terminal, the cut-off point is contacted respectively with the L line of the electric iron and N line and is examined
It surveys, while using pressure difference between the multimeter measuring connection terminal, being incorporated to after pressure difference between the measuring connection terminal is reduced to zero
Connecting wire completes DC line closed loop.
10. a kind of readable storage medium storing program for executing, is stored thereon with computer program, which is characterized in that the computer program is processed
The step of device realizes the DC circuit arc-suppressing method according to any one of claims 1 to 5 based on capacitance-resistance characteristic when executing.
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Application publication date: 20191122 |