CN106786340B - A kind of voltage shock avoiding decompression opening device and its control method again - Google Patents
A kind of voltage shock avoiding decompression opening device and its control method again Download PDFInfo
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- CN106786340B CN106786340B CN201611096638.5A CN201611096638A CN106786340B CN 106786340 B CN106786340 B CN 106786340B CN 201611096638 A CN201611096638 A CN 201611096638A CN 106786340 B CN106786340 B CN 106786340B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/28—Modifications for introducing a time delay before switching
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
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Abstract
The present invention discloses a kind of novel voltage shock avoiding decompression opening device and its control method again, and the opening device again includes: power supply conversion and energy-storage units；Analog acquisition unit；Switch acquisition unit；Relay output unit；Central processing unit, central processing unit are converted with power supply connect with energy-storage units, analog acquisition unit, switch acquisition unit and relay output unit respectively.The present invention is after circuit system voltage generation rolling electricity restores again, the calculating of angular difference, pressure difference and frequency difference is carried out by detection busbar voltage and the residual voltage of motor, when meeting setting value by the contactor closing time measured automatically, the pulse of splice grafting tentaculum is issued in advance, the residual voltage and busbar voltage synchroswitching of system and motor, reduce dash current when guaranteeing to restart contactor；When the decaying of the residual voltage of motor is too fast is unable to satisfy resynchronisation combined floodgate, so that contactor is closed a floodgate by the way of long delay, restart motor in batches, avoid the impact that group opens motor to circuit system.
Description
Technical field
The present invention relates to a kind of novel voltage shock avoiding decompression opening device and its control methods again.
Background technique
A.C. contactor is commonly used in alternating current circuit, the current induced magnetic field flowed through using coil, to make contact
Closure, to achieve the purpose that control load appliance.After energization, coil can generate powerful magnetic field, make the quiet iron in electromagnetic system
Core generates electromagnetic attraction armature, and makes with moving contact the movement of switch or closure, and when power-off, magnetic force disappears, and contact restores again
To as former state: it is normally closed, it is closed, it is normally opened, it opens.Traditional A.C. contactor circuit during use, due to power supply system
Unstable contactor to be caused to discharge suddenly at runtime there is a phenomenon where instantaneous loss of pressure, the safety for affecting load circuit is steady
Fixed operation, has brought tremendous economic losses and security risk to continuous production type enterprise.
In order to solve this technical problem, the prior art is when power supply system occurs to shake point, the power supply of switching contactor,
After detecting that power supply system voltage restores, the power supply of switching contactor, makes the power supply system power again to contactor again, and
Be immediately controlled contactor combined floodgate, this settling mode have the disadvantages that not have fast recovery of power supply and delay power supply this two
A requirement；Contactor is already off when shaking electricity, and the residual voltage of motor can be according to self decaying of certain rule, in power supply system at this time
After voltage restores, contactor closes a floodgate immediately is likely to cause the residual voltage and busbar voltage antiphase combined floodgate of motor, causes very big
Dash current can burn motor or draw cross-system voltage when serious.
Summary of the invention
The purpose of the present invention is to provide one kind can shake the electric duration it is shorter when Fast synchronization closing contactor,
Dash current crosses novel voltage shock avoiding decompression opening device and its control method and its control again of long time delay time-division batch delayed startup motor
Method processed.
To achieve the goals above, the technical solution adopted in the present invention is as follows:
A kind of novel voltage shock avoiding decompression opening device again, comprising:
Power supply for providing electric energy is converted and energy-storage units；
For acquiring the control electric current for controlling voltage, busbar voltage, electric moter voltage and contactor coil of contactor respectively
Analog acquisition unit；
For acquiring the supplemental location information of contactor, the supplemental location information and electric motor protective device of incoming breaker
Trip operation signal contact situation switch acquisition unit；
Close a floodgate and indicate that the relay of novel voltage shock avoiding decompression opening device operating status again is defeated for control contactor
Unit out；
For controlling the central processing unit of entire circuit work, the central processing unit is converted with the power supply respectively
It is electrically connected with energy-storage units, analog acquisition unit, switch acquisition unit and relay output unit.
Preferably, the power supply conversion and energy-storage units include sequentially connected AC/DC converting unit, super capacitor energy-storage
Unit, linear voltage regulator and DC/DC converting unit.
Preferably, the analog acquisition unit includes three voltage changers and a power pack, each institute
Stating voltage changer includes main coil and secondary coil, wherein and the main coil of first voltage changer accesses alternating current voltage,
The main coil of second voltage changer accesses busbar voltage, and the main coil of third voltage changer accesses electric moter voltage, and
The secondary coil of all voltage changers is both connected between central processing unit and ground wire, the input of the power pack
The control electric current into contactor coil is terminated, the output end of power pack is connect with central processing unit.
Preferably, the switch acquisition unit includes three sub- acquisition units, each described sub- acquisition unit includes
Optocoupler, the second to the 4th resistance and capacitor, the optocoupler include light emitting diode and phototriode, the phototriode
Collector is connect with the output end of the linear voltage regulator, and the emitter of phototriode is connect with the first end of the 4th resistance,
The second end of 4th resistance is grounded, and the emitter of phototriode is connect with the central processing unit, the light emitting diode
Cathode and anode between be connected in parallel to capacitor and second resistance, the minus earth of light emitting diode, the sun of light emitting diode
The connection of the first end of pole and 3rd resistor, the second end of 3rd resistor form the input terminal of the sub- acquisition unit；Wherein, first
The supplemental location information of the input terminal acquisition contactor of a sub- acquisition unit, the input terminal of second sub- acquisition unit
Acquire the supplemental location information of incoming breaker, the jump of the input terminal acquisition electric motor protective device of the third sub- acquisition unit
Lock action signal contact situation.
Preferably, the relay output unit includes three sub-control units, each sub-control unit includes the 5th
Resistance, triode and relay, the relay include coil and dynamic circuit connector switch, the first end and centre of the 5th resistance
Unit connection is managed, the second end of the 5th resistance and the base stage of triode connect, collector and the AC/DC converting unit of triode
Output end connection, the emitter of triode and the first end of coil connect, the second end ground connection of coil；Wherein, first son control
Dynamic circuit connector switch in unit processed is connected in series in the circuit where contactor coil, and second, in third sub-control unit
Dynamic circuit connector switch be connected in series in indicating circuit respectively.
The present invention also provides the control methods of the opening device again of the novel voltage shock avoiding decompression described in one kind, comprising the following steps:
A central processing unit) is initialized；
B analog quantity, switching value reading and calculating logic) are executed；
C it) executes equipment operation and detects logic with contactor closing time；
D) execute shake point identification with inspection synchronize restart logic；
E it) executes long delay and restarts logic.
Preferably, the analog quantity, switching value read with calculating logic the following steps are included:
A1 it) reads the control voltage acquisition value of contactor and is stored in the data buffer zone of central processing unit；
B1 it) reads the control current acquisition value of contactor coil and is stored in the data buffer zone of central processing unit；
C1 it) reads busbar voltage collection value and is stored in the data buffer zone of central processing unit；
D1 it) reads electric moter voltage collection value and is stored in the data buffer zone of central processing unit；
E1 the amplitude of the control voltage acquisition value of contactor) is calculated；
F1 the amplitude of the control current acquisition value of contactor coil) is calculated；
G1 the amplitude of busbar voltage collection value) is calculated；
H1 the amplitude of electric moter voltage collection value) is calculated；
I1) pressure difference according to busbar voltage collection value and electric moter voltage collection value calculating busbar voltage with electric moter voltage, phase
Angular difference and difference on the frequency；
J1 the supplemental location information of contactor, the supplemental location information and electric motor protective device of incoming breaker) are read
Trip operation signal contact situation these three switching values state.
Preferably, equipment operation with contactor closing time detection logic the following steps are included:
A2) judge whether equipment running mark sets 1, if so, entering in next step, if it is not, entering step G2)；
B2) judge to shake whether point distinguishing mark is 1, if so, logic terminates, if it is not, entering in next step；
C2) judge whether the corresponding switching value of contactor aided location is " dividing " state, if so, entering step F2), if
It is no, into next step；
D2) judge the corresponding switching value of breaker aided location whether serve as reasons " conjunction " become " dividing ", if so, entering step
F2), if it is not, entering in next step；
E2) judge the corresponding switching value of trip operation signal contact of electric motor protective device whether serve as reasons " dividing " become
" conjunction ", if it is not, logic terminates, if so, entering in next step；
F2) equipment running mark is reset, by contactor current break flag clear, logic terminates；
G2) judge whether tentaculum current break mark sets 1, if so, entering step I2), if it is not, entering in next step；
H2) judge whether the control electric current of contactor coil is mutated the control current value more than 20% contactor coil；If
No, logic terminates, if so, closing time detection counter is reset, the automatic accumulated counts of closing time detection counter will be connect
Tentaculum current break mark sets 1, and logic terminates；
I2) judge whether the corresponding switching value of contactor aided location is " conjunction " state, if it is not, logic terminates, if so, into
Enter in next step；
J2) by the closing time buffer area of closing time deposit central processing unit；
K2 it) reads the numerical value of several closing times and calculates closing time average value；
L2 equipment running mark) is set 1, logic terminates.
Preferably, rolling point identification and inspection synchronize restart logic the following steps are included:
A3) judge whether equipment running mark sets 1, if it is not, logic terminates, if so, entering in next step；
B3) judge to shake whether point distinguishing mark sets 1, if so, entering step E3), if it is not, entering in next step；
C3) judge the amplitude of the control voltage acquisition value of contactor whether be mutated reduce by 20% setting voltage definite value or
Less than the voltage definite value of 80% setting, if it is not, logic terminates, if so, entering in next step；
D3) judge whether the corresponding switching value of contactor aided location is " dividing " state, if it is not, logic terminates, if so, will
Voltage Drop time counter is reset, and will be shaken point distinguishing mark and is set 1, logic terminates；
E3) count is incremented for Voltage Drop time counter, judge Voltage Drop time counter counting total time whether
Greater than the time for shaking point setting；It being reset if so, point distinguishing mark will be shaken, long delay is restarted into flag clear, logic terminates, if
It is no, into next step；
F3) judge that long delay restarts whether mark sets 1, if so, logic terminates, if it is not, entering in next step；
G3) judge whether the amplitude of the control voltage acquisition value of contactor is greater than rolling point and restores voltage setting value, if it is not, patrolling
Collecting terminates, if so, entering in next step；
H3) judge whether the pressure difference of busbar voltage and electric moter voltage is less than and open pressure differential resetting value again, if it is not, again by long delay
Active flag sets 1, and long delay is restarted counter O reset, and logic terminates, if so, entering in next step；
I3) judge whether the difference on the frequency of busbar voltage and electric moter voltage is less than and open frequency difference setting value again, if it is not, by long delay
Restart mark and set 1, long delay is restarted into counter O reset, logic terminates, if so, entering in next step；
J3) contactor is calculated to close a floodgate in advance angular difference；
K3) judge whether combined floodgate angular difference is less than and opens angular difference setting value again contactor in advance, if it is not, logic terminates, if so, into
In next step；
L3 the relay coil) controlled in first sub-control unit is powered, and contactor is made to close a floodgate, and will shake electric distinguishing mark
It resets, logic terminates.
Preferably, the long delay restart logic the following steps are included:
A4) judge whether equipment running mark sets 1, if it is not, logic terminates, if so, entering in next step；
B4) judge to shake whether point distinguishing mark sets 1, if it is not, logic terminates, if so, entering in next step；
C4) judge that long delay restarts whether mark sets 1, if it is not, long delay is restarted counter O reset, logic knot
Beam, if so, entering in next step；
D4) judge whether the amplitude of the control voltage acquisition value of contactor is greater than rolling point and restores voltage setting value, if it is not, will
Long delay restarts counter O reset, and logic terminates, if so, entering in next step；
E4) long delay restarts counter and adds 1；
F4) judge that long delay restarts the gate time of counter and whether is greater than long delay definite value, if it is not, logic terminates,
If so, entering in next step；
G4 the relay coil) controlled in first sub-control unit is powered, and contactor is made to close a floodgate, and will shake electric distinguishing mark
It resets, long delay is restarted into flag clear, logic terminates.
Compared with prior art, the beneficial effect of opening device and its control method exists the novel voltage shock avoiding decompression of the present invention again
In: after circuit system voltage generation rolling electricity restores again, the residual voltage for passing through detection busbar voltage and motor carries out the present invention
The calculating of angular difference, pressure difference and frequency difference issues splice grafting touching when meeting setting value by the contactor closing time measured automatically in advance
Device pulse, the residual voltage and busbar voltage synchroswitching of system and motor, reduce dash current when guaranteeing to restart contactor；Work as electricity
The residual voltage decaying of machine is too fast when being unable to satisfy resynchronisation and closing a floodgate, and so that contactor is closed a floodgate by the way of long delay, guarantees in batches again
Start motor, avoids the impact that group opens motor to circuit system.
Detailed description of the invention
Fig. 1 is the circuit diagram of novel voltage shock avoiding decompression of the present invention opening device again；
Fig. 2 is the main logic block diagram of the novel voltage shock avoiding decompression of the present invention control method of opening device again；
Fig. 3 is analog quantity of the present invention, switching value is read and the block diagram of calculating logic；
Fig. 4 is the block diagram that equipment of the present invention operation detects logic with contactor closing time；
Fig. 5 be it is of the present invention shake point identification with examine synchronize restart the block diagram of logic；
Fig. 6 is the block diagram that long delay of the present invention restarts logic.
Specific embodiment
The present invention is further described below combined with specific embodiments below.
It please referring to shown in Fig. 1 to Fig. 6, the present invention provides a kind of novel voltage shock avoiding decompression opening device and its control method again,
Include:
A kind of novel voltage shock avoiding decompression opening device again, comprising:
Power supply for providing electric energy is converted and energy-storage units 1；
For acquiring the control electric current for controlling voltage, busbar voltage, electric moter voltage and contactor coil of contactor respectively
Analog acquisition unit 2；
For acquiring the supplemental location information of contactor, the supplemental location information and electric motor protective device of incoming breaker
Trip operation signal contact situation switch acquisition unit 3；
Close a floodgate and indicate that the relay of novel voltage shock avoiding decompression opening device operating status again is defeated for control contactor
Unit 4 out；
For controlling the central processing unit of entire circuit work, the central processing unit includes microprocessor and its outer
Circuit is enclosed, the central processing unit is converted with the power supply adopt with energy-storage units 1, analog acquisition unit 2, switching value respectively
Collect unit 3 and relay output unit 4 is electrically connected.
In the present invention, the power supply conversion and energy-storage units 1 include sequentially connected AC/DC converting unit, super electricity
Hold energy-storage units, linear voltage regulator and DC/DC converting unit.Alternating current is converted into direct current by the AC/DC converting unit, and is given
Super capacitor storage unit charges.As shown in Figure 1, the super capacitor storage unit is by three super capacitor C1-C3, one
A current-limiting resistance R1 and a diode D1 composition.The linear voltage regulator direct current is handled after to central processing unit
It powers with switch acquisition unit 3, the DC/DC converting unit supplies after handling direct current to circuit where switching value
Electricity.When system does not shake electricity, AC/DC converting unit is powered to whole device, when system shakes electricity, in super capacitor storage unit
Electric energy give whole device power supply.
In addition, the analog acquisition unit 2 includes a three voltage changer TV1-TV3 and power pack TA1,
Each described voltage changer includes main coil and secondary coil, wherein the main coil access of first voltage changer TV1
Alternating current voltage (i.e. the control voltage of contactor), the main coil of second voltage changer TV2 access busbar voltage, third
The main coil of voltage changer TV3 accesses electric moter voltage, and the secondary coil of all voltage changers is both connected to centre
It manages between unit and ground wire, the control electric current of the input terminal access contactor coil of the power pack TA1, power pack
The output end of TA1 is connect with central processing unit.The output voltage of first voltage changer TV1 is AUL, and second voltage becomes
The output voltage of parallel operation TV2 is AUS, and the output voltage of third voltage changer TV3 is AUM, and power pack TA1 will be external
Electric current is converted into light current pressure, output voltage AIK.AUL, AUS, AUM and AIK, which enter, passes through modulus in central processing unit
Converter is converted into digital signal, calculates by corresponding amplitude size UL, US, UM, IK is calculated, and according to these data
The DJ that mutually reports to the leadship after accomplishing a task between busbar voltage US and motor residual voltage UM, difference in magnitude DU and difference on the frequency DF out.
In the present invention, the switch acquisition unit 3 includes three sub- acquisition units, each described sub- acquisition unit
Including optocoupler, the second to the 4th resistance R2-R4 and capacitor, the optocoupler includes light emitting diode and phototriode, the light
The collector of quick triode is connect with the output end of the linear voltage regulator, the emitter of phototriode and the 4th resistance R4's
First end connection, the second end ground connection of the 4th resistance R4, the emitter of phototriode are connect with the central processing unit, institute
It states and is connected in parallel to capacitor and second resistance R2 between the cathode of light emitting diode and anode, the minus earth of light emitting diode,
The anode of light emitting diode is connect with the first end of 3rd resistor R3, and the second end of 3rd resistor R3 forms the sub- acquisition unit
Input terminal；Wherein, the supplemental location information KM of the input terminal acquisition contactor of first sub- acquisition unit, second institute
State the supplemental location information QF of the input terminal acquisition incoming breaker of sub- acquisition unit, the input of the third sub- acquisition unit
The trip operation signal contact situation TP of end acquisition electric motor protective device.
The relay output unit 4 include three sub-control units, each sub-control unit include the 5th resistance R5,
Triode and relay, the relay include coil and dynamic circuit connector switch, the first end and central processing of the 5th resistance R5
Unit connection, the second end of the 5th resistance R5 and the base stage of triode connect, collector and the AC/DC converting unit of triode
Output end connection, the emitter of triode and the first end of coil connect, the second end ground connection of coil；Wherein, first son control
Dynamic circuit connector switch in unit processed is connected in series in the circuit where contactor coil, and second, in third sub-control unit
Dynamic circuit connector switch be connected in series in indicating circuit respectively.
The present invention also provides a kind of control methods of novel voltage shock avoiding decompression opening device again, comprising the following steps:
A central processing unit) is initialized；
B analog quantity, switching value reading and calculating logic) are executed；
C it) executes equipment operation and detects logic with contactor closing time；
D) execute shake point identification with inspection synchronize restart logic；
E it) executes long delay and restarts logic.
Wherein, the analog quantity, switching value read with calculating logic the following steps are included:
A1 it) reads the control voltage acquisition value of contactor and is stored in the data buffer zone of central processing unit；
B1 it) reads the control current acquisition value of contactor coil and is stored in the data buffer zone of central processing unit；
C1 it) reads busbar voltage collection value and is stored in the data buffer zone of central processing unit；
D1 it) reads electric moter voltage collection value and is stored in the data buffer zone of central processing unit；
E1 the amplitude of the control voltage acquisition value of contactor) is calculated；
F1 the amplitude of the control current acquisition value of contactor coil) is calculated；
G1 the amplitude of busbar voltage collection value) is calculated；
H1 the amplitude of electric moter voltage collection value) is calculated；
I1) pressure difference according to busbar voltage collection value and electric moter voltage collection value calculating busbar voltage with electric moter voltage, phase
Angular difference and difference on the frequency；
J1 the supplemental location information of contactor, the supplemental location information and electric motor protective device of incoming breaker) are read
Trip operation signal contact situation these three switching values state.
Equipment operation with contactor closing time detection logic the following steps are included:
A2) judge whether equipment running mark sets 1, if so, entering in next step, if it is not, entering step G2)；
B2) judge to shake whether point distinguishing mark is 1, if so, logic terminates, if it is not, entering in next step；
C2) judge whether the corresponding switching value of contactor aided location is " dividing " state, if so, entering step F2), if
It is no, into next step；
D2) judge the corresponding switching value of breaker aided location whether serve as reasons " conjunction " become " dividing ", if so, entering step
F2), if it is not, entering in next step；
E2) judge the corresponding switching value of trip operation signal contact of electric motor protective device whether serve as reasons " dividing " become
" conjunction ", if it is not, logic terminates, if so, entering in next step；
F2) equipment running mark is reset, by contactor current break flag clear, logic terminates；
G2) judge whether tentaculum current break mark sets 1, if so, entering step I2), if it is not, entering in next step；
H2) judge whether the control electric current of contactor coil is mutated the control current value more than 20% contactor coil；If
No, logic terminates, if so, closing time detection counter is reset, the automatic accumulated counts of closing time detection counter will be connect
Tentaculum current break mark sets 1, and logic terminates；
I2) judge whether the corresponding switching value of contactor aided location is " conjunction " state, if it is not, logic terminates, if so, into
Enter in next step；
J2) by the closing time buffer area of closing time deposit central processing unit；
K2 it) reads the numerical value of several closing times and calculates closing time average value；
L2 equipment running mark) is set 1, logic terminates.
Equipment operation and the major function of contactor closing time detection logic are whether detection device runs
(DevRunFalg) and measuring and calculating contactor closing time (Thz).The measuring and calculating of contactor closing time is by detecting contactor
The electric current IK of coil has mutation to start timing, to detecting that the switching value DI_KM of contactor is that " conjunction " state terminates, at this time
To time be exactly time Ti that this contactor closes a floodgate, in order to make data more reliable, control logic is done using average data
The closing time repeatedly measured is averaged by method, using average data as the Thz finally used.Measuring splice grafting tentaculum
After time, also indicate that contactor has closed a floodgate, it is that 1 representative is set that the motor that contactor is controlled, which has run setting DevRunFalg,
Received shipment row.When the aided location DI_QF that the aided location DI_KM for detecting contactor is " dividing " state or breaker is
" dividing " state, the tripped condition DI_TP of electric motor protective device are " conjunction " state, then it is assumed that contactor is already off, at this time equipment
It is out of service, if it is 1 that DevRunFalg clear 0., which is shaken electro-detection mark HDChkFlag, illustrate these switches of device at this time
Amount state is all that caused by shaking electricity, will not judge switching value situation of change above at this time.
Rolling point identification and inspection synchronize restart logic the following steps are included:
A3) judge whether equipment running mark sets 1, if it is not, logic terminates, if so, entering in next step；
B3) judge to shake whether point distinguishing mark sets 1, if so, entering step E3), if it is not, entering in next step；
C3) judge whether the amplitude of the control voltage acquisition value of contactor is mutated the voltage definite value Ue for reducing by 20% setting
Or the voltage definite value Ue less than 80% setting, if it is not, logic terminates, if so, entering in next step；
D3) judge whether the corresponding switching value of contactor aided location is " dividing " state, if it is not, logic terminates, if so, will
Voltage Drop time counter is reset, and will be shaken point distinguishing mark and is set 1, logic terminates；
E3) count is incremented for Voltage Drop time counter, judge Voltage Drop time counter counting total time whether
Greater than the time for shaking point setting, (it is constant that Voltage Drop time counter counts the primary time, according to Voltage Drop time counting
Time needed for the counts of device and every time counting can calculate the counting total time of Voltage Drop time counter)；If so,
Point distinguishing mark will be shaken to reset, long delay is restarted into flag clear, logic terminates, if it is not, entering in next step；
F3) judge that long delay restarts whether mark sets 1, if so, logic terminates, if it is not, entering in next step；
G3) judge whether the amplitude of the control voltage acquisition value of contactor is greater than rolling point and restores voltage setting value, if it is not, patrolling
Collecting terminates, if so, entering in next step；
H3) judge whether the pressure difference of busbar voltage and electric moter voltage is less than and open pressure differential resetting value again, if it is not, again by long delay
Active flag sets 1, and long delay is restarted counter O reset, and logic terminates, if so, entering in next step；
I3) judge whether the difference on the frequency of busbar voltage and electric moter voltage is less than and open frequency difference setting value again, if it is not, by long delay
Restart mark and set 1, long delay is restarted into counter O reset, logic terminates, if so, entering in next step；
J3) contactor is calculated to close a floodgate in advance angular difference；
K3) judge whether combined floodgate angular difference is less than and opens angular difference setting value again contactor in advance, if it is not, logic terminates, if so, into
In next step；
L3 the relay coil) controlled in first sub-control unit is powered, and contactor is made to close a floodgate, and will shake electric distinguishing mark
It resets, logic terminates.
Rolling point identification and inspection synchronize restart logic and mainly identify that rolling whether has occurred when equipment is run is electric.
The identification for shaking electricity is that control voltage UL reduces (mutation 20%Ue) suddenly or is slowly declined to 80%Ue hereinafter, contactor discharges
(DI_KM state becomes " dividing "), and restore (UL > UHset) within the rolling of setting electric time Thdset.It, will after identifying rolling electricity
It shakes electro-detection mark HDChkFlag and sets 1.After controlling voltage recovery, control logic detects busbar voltage US and motor residual voltage UM
Between pressure difference DU and frequency difference DF whether meet synchroswitching condition DU < DUset, DF < DFset.If two conditions are all full
Foot, if then logic measuring and calculating goes to send out order of closing a floodgate according to the time Thz of splice grafting tentaculum, whether the differential seat angle DJx calculated meets
Synchronous condition DJx < DJset.Relay J1 hair is set to close contactor coil order if DO_ON is immediately controlled in satisfaction.If discontented
It is sufficient then wait.If pressure difference, frequency difference is unsatisfactory for synchronous condition, then enters long delay and restart logic.
The long delay restart logic the following steps are included:
A4) judge whether equipment running mark sets 1, if it is not, logic terminates, if so, entering in next step；
B4) judge to shake whether point distinguishing mark sets 1, if it is not, logic terminates, if so, entering in next step；
C4) judge that long delay restarts whether mark sets 1, if it is not, long delay is restarted counter O reset, logic knot
Beam, if so, entering in next step；
D4) judge whether the amplitude of the control voltage acquisition value of contactor is greater than rolling point and restores voltage setting value, if it is not, will
Long delay restarts counter O reset, and logic terminates, if so, entering in next step；
E4) long delay restarts counter and adds 1；
F4) judge that long delay restarts the gate time of counter and whether is greater than long delay definite value, if it is not, logic terminates,
If so, entering in next step；
G4 the relay coil) controlled in first sub-control unit is powered, and contactor is made to close a floodgate, and will shake electric distinguishing mark
It resets, long delay is restarted into flag clear, logic terminates.
The long delay, which restarts logic and is mainly responsible for long delay, restarts function, due to shake point identification synchronous with inspection again
It detects that motor residual voltage decays too fast (pressure difference DU and frequency difference DF are both greater than synchronization settings value) in starting logic, is not able to satisfy at this time
Synchroswitching requirement after only arriving using long delay (Tcyset) time, directly controls DO_ON output splice grafting tentaculum order.No
Same motor long delay (Tcyset) is arranged can be different, ensure that difference is arranged in batches by delay in motor group point in this way
Be again started up, avoid causing excessive shock to power supply system.
In conclusion the invention has the characteristics that: 1. measure the switching current of contactor, for calculating contactor
Closing time.2. measuring busbar voltage and motor residual voltage, and its difference in magnitude, frequency are calculated by busbar voltage and motor residual voltage
Difference and phase angle difference.3. the difference in magnitude between bus and motor, difference on the frequency calculates pre- close a floodgate by the contactor closing time of measuring and calculating
When differential seat angle whether meet synchroswitching requirement, if meet close a floodgate immediately, reduce the dash current of motor and system.If
It is unsatisfactory for, then enters long delay and start motor in batches.
It uses and has the advantage that 1. in the case where the rolling electric duration is shorter with upper type, motor residual voltage value decays
, it can be achieved that Fast synchronization closes a floodgate when less.Dash current is excessive (if not detecting synchronous condition, to be may cause very avoiding
Large inrush current) in the case of, restore motor power supply rapidly, reduces load power-off time.2. fully considered synchronize it is unsuccessful
Under conditions of, it enters long delay and restarts, by delayed startup motor in batches.It simultaneously and rapidly closes a floodgate and grows after realizing rolling electricity
Delay is closed a floodgate in batches and is combined, and guarantees reliably to restore load supplying after shaking electricity, reduces economic loss.
Schematically the present invention and embodiments thereof are described above, description is not limiting, institute in attached drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited to this.So if the common skill of this field
Art personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution
Similar frame mode and embodiment, are within the scope of protection of the invention.
Claims (10)
1. a kind of voltage shock avoiding decompression opening device again characterized by comprising
Power supply for providing electric energy is converted and energy-storage units；
For acquiring the mould of the control electric current for controlling voltage, busbar voltage, electric moter voltage and contactor coil of contactor respectively
Analog quantity acquisition unit；
For acquiring the jump of the supplemental location information of contactor, the supplemental location information and electric motor protective device of incoming breaker
The switch acquisition unit of lock action signal contact situation；
The relay output unit of voltage shock avoiding decompression opening device operating status again is closed a floodgate and indicated for control contactor；
For controlling the central processing unit of entire circuit work, the central processing unit is converted and is stored up with the power supply respectively
It can unit, analog acquisition unit, switch acquisition unit and the electric connection of relay output unit.
2. voltage shock avoiding decompression as described in claim 1 opening device again, which is characterized in that the power supply conversion and energy-storage units packet
Include sequentially connected AC/DC converting unit, super capacitor storage unit, linear voltage regulator and DC/DC converting unit.
3. voltage shock avoiding decompression as claimed in claim 2 opening device again, which is characterized in that the analog acquisition unit includes three
A voltage changer and a power pack, each described voltage changer includes main coil and secondary coil, wherein the
The main coil of one voltage changer accesses alternating current voltage, and the main coil of second voltage changer accesses busbar voltage, the
The main coil of three voltage changers accesses electric moter voltage, and the secondary coil of all voltage changers is both connected to centre
It manages between unit and ground wire, the control electric current of the input terminal access contactor coil of the power pack, power pack
Output end is connect with central processing unit.
4. voltage shock avoiding decompression as claimed in claim 3 opening device again, which is characterized in that the switch acquisition unit includes three
A sub- acquisition unit, each described sub- acquisition unit include optocoupler, the second to the 4th resistance and capacitor, and the optocoupler includes hair
Optical diode and phototriode, the collector of the phototriode is connect with the output end of the linear voltage regulator, photosensitive
The emitter of triode is connect with the first end of the 4th resistance, the second end ground connection of the 4th resistance, the emitter of phototriode
It is connect with the central processing unit, capacitor and the second electricity is connected in parallel between the cathode and anode of the light emitting diode
Resistance, the minus earth of light emitting diode, the anode of light emitting diode and the first end of 3rd resistor connect, and the second of 3rd resistor
End forms the input terminal of the sub- acquisition unit；Wherein, the input terminal acquisition contactor of first sub- acquisition unit is auxiliary
Help location information, the supplemental location information of the input terminal acquisition incoming breaker of second sub- acquisition unit, third institute
State the trip operation signal contact situation of the input terminal acquisition electric motor protective device of sub- acquisition unit.
5. voltage shock avoiding decompression as claimed in claim 4 opening device again, which is characterized in that the relay output unit includes three
A sub-control unit, each sub-control unit include the 5th resistance, triode and relay, the relay include coil and
Dynamic circuit connector switch, the first end of the 5th resistance are connect with central processing unit, the second end of the 5th resistance and the base of triode
Pole connection, the collector of triode are connect with the output end of AC/DC converting unit, the emitter of triode and the first end of coil
Connection, the second end ground connection of coil；Wherein, the dynamic circuit connector switch in first sub-control unit is connected in series in contactor coil institute
Circuit in, second, the dynamic circuit connector switch in third sub-control unit is connected in series in indicating circuit respectively.
6. a kind of control method of voltage shock avoiding decompression as claimed in claim 1 to 5 opening device again, which is characterized in that packet
Include following steps:
A central processing unit) is initialized；
B analog quantity, switching value reading and calculating logic) are executed；
C it) executes equipment operation and detects logic with contactor closing time；
D) execute shake electricity identification with inspection synchronize restart logic；
E it) executes long delay and restarts logic.
7. a kind of control method of voltage shock avoiding decompression as claimed in claim 6 opening device again, which is characterized in that the simulation
Amount, switching value read with calculating logic the following steps are included:
A1 it) reads the control voltage acquisition value of contactor and is stored in the data buffer zone of central processing unit；
B1 it) reads the control current acquisition value of contactor coil and is stored in the data buffer zone of central processing unit；
C1 it) reads busbar voltage collection value and is stored in the data buffer zone of central processing unit；
D1 it) reads electric moter voltage collection value and is stored in the data buffer zone of central processing unit；
E1 the amplitude of the control voltage acquisition value of contactor) is calculated；
F1 the amplitude of the control current acquisition value of contactor coil) is calculated；
G1 the amplitude of busbar voltage collection value) is calculated；
H1 the amplitude of electric moter voltage collection value) is calculated；
I1 pressure difference, the phase angle difference of busbar voltage and electric moter voltage) are calculated according to busbar voltage collection value and electric moter voltage collection value
And difference on the frequency；
J1 the jump of the supplemental location information of contactor, the supplemental location information and electric motor protective device of incoming breaker) is read
The state of these three switching values of lock action signal contact situation.
8. a kind of control method of voltage shock avoiding decompression as claimed in claim 7 opening device again, which is characterized in that the equipment fortune
It is capable with contactor closing time detection logic the following steps are included:
A2) judge whether equipment running mark sets 1, if so, entering in next step, if it is not, entering step G2)；
B2) judge to shake whether electric distinguishing mark is 1, if so, logic terminates, if it is not, entering in next step；
C2) judge whether the corresponding switching value of contactor aided location is " dividing " state, if so, entering step F2), if it is not, into
Enter in next step；
D2) judge the corresponding switching value of breaker aided location whether serve as reasons " conjunction " become " dividing ", if so, entering step F2), if
It is no, into next step；
E2) judge the corresponding switching value of trip operation signal contact of electric motor protective device whether serve as reasons " dividing " become " closing ", if
No, logic terminates, if so, entering in next step；
F2) equipment running mark is reset, by contactor current break flag clear, logic terminates；
G2) judge whether tentaculum current break mark sets 1, if so, entering step I2), if it is not, entering in next step；
H2) judge whether the control electric current of contactor coil is mutated the control current value more than 20% contactor coil；If it is not, patrolling
Collecting terminates, if so, closing time detection counter is reset, the automatic accumulated counts of closing time detection counter, by contactor
Current break mark sets 1, and logic terminates；
I2) judge whether the corresponding switching value of contactor aided location is " conjunction " state, if it is not, logic terminates, if so, under
One step；
J2) by the closing time buffer area of closing time deposit central processing unit；
K2 it) reads the numerical value of several closing times and calculates closing time average value；
L2 equipment running mark) is set 1, logic terminates.
9. a kind of control method of voltage shock avoiding decompression as claimed in claim 8 opening device again, which is characterized in that the rolling electricity is known
Not with inspection synchronize restart logic the following steps are included:
A3) judge whether equipment running mark sets 1, if it is not, logic terminates, if so, entering in next step；
B3) judge to shake whether electric distinguishing mark sets 1, if so, entering step E3), if it is not, entering in next step；
C3) judge whether the amplitude of the control voltage acquisition value of contactor is mutated the voltage definite value for reducing by 20% setting or is less than
The voltage definite value of 80% setting, if it is not, logic terminates, if so, entering in next step；
D3) judge whether the corresponding switching value of contactor aided location is " dividing " state, if it is not, logic terminates, if so, by voltage
Drop-out time counter O reset will shake electric distinguishing mark and set 1, and logic terminates；
E3) count is incremented for Voltage Drop time counter, judges whether the counting total time of Voltage Drop time counter is greater than
Shake the time of electricity setting；It being reset if so, electric distinguishing mark will be shaken, long delay is restarted into flag clear, logic terminates, if it is not,
Into in next step；
F3) judge that long delay restarts whether mark sets 1, if so, logic terminates, if it is not, entering in next step；
G3) judge whether the amplitude of the control voltage acquisition value of contactor is greater than rolling electricity and restores voltage setting value, if it is not, logic knot
Beam, if so, entering in next step；
H3) judge whether the pressure difference of busbar voltage and electric moter voltage is less than and open pressure differential resetting value again, if it is not, long delay is restarted
Mark sets 1, and long delay is restarted counter O reset, and logic terminates, if so, entering in next step；
I3) judge whether the difference on the frequency of busbar voltage and electric moter voltage is less than and open frequency difference setting value again, if it is not, long delay is opened again
Dynamic mark sets 1, and long delay is restarted counter O reset, and logic terminates, if so, entering in next step；
J3) contactor is calculated to close a floodgate in advance angular difference；
K3) judge whether combined floodgate angular difference is less than and opens angular difference setting value again contactor in advance, if it is not, logic terminates, if so, into next
Step；
L3 the relay coil) controlled in first sub-control unit is powered, and contactor is made to close a floodgate, and it is clear will to shake electric distinguishing mark
Zero, logic terminates.
10. a kind of control method of voltage shock avoiding decompression as claimed in claim 9 opening device again, which is characterized in that the length is prolonged
When restart logic the following steps are included:
A4) judge whether equipment running mark sets 1, if it is not, logic terminates, if so, entering in next step；
B4) judge to shake whether electric distinguishing mark sets 1, if it is not, logic terminates, if so, entering in next step；
C4) judge that long delay restarts whether mark sets 1, if it is not, long delay is restarted counter O reset, logic terminates, if
It is, into next step；
D4) judge whether the amplitude of the control voltage acquisition value of contactor is greater than rolling electricity and restores voltage setting value, if it is not, length is prolonged
When restart counter O reset, logic terminates, if so, enter in next step；
E4) long delay restarts counter and adds 1；
F4) judge that long delay restarts the gate time of counter and whether is greater than long delay definite value, if it is not, logic terminates, if so,
Into in next step；
G4 the relay coil) controlled in first sub-control unit is powered, and contactor is made to close a floodgate, and it is clear will to shake electric distinguishing mark
Zero, long delay is restarted into flag clear, logic terminates.
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| TWI645648B (en) * | 2018-04-03 | 2018-12-21 | 群光電能科技股份有限公司 | Charging apparatus and adaptive frequency-dividing method of controlling the same |
| CN109144159B (en) * | 2018-09-14 | 2023-07-28 | 江苏国网自控科技股份有限公司 | Control method of single-phase electric-dazzling simulation generating device based on independent electric voltage regulation controller |
| CN111181445B (en) * | 2018-11-13 | 2021-11-05 | 中国石油化工股份有限公司 | Self-starting control system and method for beam-pumping unit |
| CN110112822B (en) * | 2019-05-21 | 2023-04-28 | 王稳忠 | Intelligent device for uninterrupted power supply by mutual conversion between three-phase dual power supply and phase voltage |
| CN114448076B (en) * | 2020-11-03 | 2024-08-27 | 中科华安科技(淄博)有限公司 | Motor protection device |
| CN112881788B (en) * | 2021-02-24 | 2022-08-02 | 深圳市中电软件有限公司 | Motor restarting method and system based on electric dazzling rapid identification method |
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