CN106300398A - A kind of alternate load based on stable state waveform fitting transfer termination - Google Patents
A kind of alternate load based on stable state waveform fitting transfer termination Download PDFInfo
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- CN106300398A CN106300398A CN201610907863.6A CN201610907863A CN106300398A CN 106300398 A CN106300398 A CN 106300398A CN 201610907863 A CN201610907863 A CN 201610907863A CN 106300398 A CN106300398 A CN 106300398A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The present invention provides a kind of alternate load based on stable state waveform fitting to shift termination, described termination includes exchanging main circuit module, sampling module, command operating module, main control module and communication interface modules, described main control module is connected with described communication interface modules, sampling module, command operating module respectively, and described sampling module is also connected with the described main circuit module that exchanges with described command operating module.Based on stable state waveform fitting the alternate load transfer termination that embodiment of the present invention provides, it is possible to quickly realize the transfer of alternate load in commutation operating process, it is to avoid user has a power failure；Breakpoint and closing point immediate current can go to zero in commutation operates, it is to avoid produce bigger dash current, reduce commutation device body and the impact of electrical equipment.Purpose is by automatically adjusting distribution transformer and the three-phase load unbalance of low-voltage circuit, reduces electric energy loss, less low-voltage problem, solves distribution transformer one-phase overload problem.
Description
Technical field
The present invention relates to low-voltage distribution and field of energy-saving technology, particularly to a kind of based on stable state waveform fitting alternate negative
Idling moves termination.
Background technology
A phase, B phase, C phase three-phase phase line and zero line is generally comprised, if three-phase circuit is negative in current low-voltage circuit
Lotus is uneven, then the electric energy loss of distribution transformer and low-voltage circuit can be caused to increase, and may cause low-voltage problem, very
To the single-phase winding burning transformator.
Currently, the method that three-phase load unbalance is automatically adjusted has mains side alternate flying capcitor method, dynamic reactive to mend
Compensation method, load-side load transfer method etc..Wherein, the principle of alternate flying capcitor method is by bridging on low-voltage bus bar
Capacitor, from the phase shunt current that the duty ratio in opposite directions that duty ratio is heavier is lighter, makes distribution low-voltage outlet three-phase current the most flat
Weighing apparatus.The advantage of the method is that adjusting means is fairly simple, installs more convenient, and shortcoming is to regulate distribution transformer three-phase electricity
The imbalance of stream, it is impossible to the three-phase current unbalance of regulation low-voltage circuit.Dynamic reactive rate compensation method is to research and develop in recent years
New method, its principle is similar to alternate flying capcitor method, and its advantage is both to have regulated current imbalance, and also regulation voltage is uneven
Weighing apparatus.The advantage of the method is multiple functional, and regulation is fine, and fast response time, shortcoming is also to regulate distribution transformer three-phase
The imbalance of electric current, it is impossible to the three-phase current unbalance of regulation low-voltage circuit, and the power dissipation ratio of device own is higher, and cost compares
High.
The principle of load-side load transfer method is that employing is several is installed on the automatic commutation of single-phase user's branched line eventually
End, by User Part load from duty ratio heavier be automatically transferred to the phase that duty ratio is lighter mutually, thus realize distribution transformer
Outlet and circuit three-phase current are in a basic balance, and the method can reduce the electric energy loss of transformator, can reduce again the electric energy of circuit
Loss, and cost ratio is relatively low.
The most conventional alternate load transfer method is to use zero passage phase-selecting method, i.e. in ABC three-phase circuit, works as load
This phase of disjunction during the current waveform zero passage of heavier current phase, closes when the target phase voltage waveform zero passage that duty ratio is lighter
This phase.The problem of the method is, after circuit disjunction, there is induced electromotive force in load side electrical circuitry, when target phase voltage mistake
When zero, the voltage of closing point is also not zero, and circuit Guan Bi moment, can produce bigger electric current, produces electrical equipment or electrical equipment
Raw bigger impact, or produce switching overvoltage, affect the normal use of electrical equipment, or cause the quality of power supply to decline.
Summary of the invention
The purpose of embodiment of the present invention is to provide a kind of alternate load based on stable state waveform fitting transfer terminal dress
Put, it is possible in commutation operating process, quickly realize the transfer of alternate load, it is to avoid user has a power failure；Can disjunction in commutation operates
Point and closing point immediate current go to zero, it is to avoid produce bigger dash current, it is achieved alternate load smooth transfer, reduce exchange
Phase device body and the impact of electrical equipment.Purpose is by automatically adjusting the three-phase load of distribution transformer and low-voltage circuit not
Balance, reduces electric energy loss, less low-voltage problem, solves distribution transformer one-phase overload problem.
For achieving the above object, the present invention provides a kind of alternate load based on stable state waveform fitting to shift termination,
Described termination includes exchanging main circuit module, sampling module, command operating module, main control module and communication interface modules,
Described main control module is connected with described communication interface modules, sampling module, command operating module respectively, described sampling module and institute
State command operating module to be also connected, wherein with the described main circuit module that exchanges: described exchange main circuit module includes mains side electricity
Road, on-off circuit and load side electrical circuitry, described mains side circuit includes the A circuitry phase of parallel connection, B circuitry phase, C circuitry phase, described
On-off circuit includes that the magnetic latching relay corresponding with each circuitry phase, described load side electrical circuitry include current transformer, electricity
Pressure transformer and load-side lead-out terminal；Described A circuitry phase, B circuitry phase, C circuitry phase structure identical, all include input terminal
And voltage transformer；Described communication interface modules instructs for receiving the commutation switched from current circuitry phase to target circuitry phase,
And described commutation instruction is sent to described main control module；It is mutual that described sampling module is used for gathering electric current in described load side electrical circuitry
The current signal of sensor and gather the voltage signal of voltage transformer in described current circuitry phase；Described main control module includes meter
Time device and for controlling the chronograph control unit that described timer is turned on and off, described timer is used for responding described timing
The control instruction of device control unit, records transformation period and the note of the current signal of current transformer in described load side electrical circuitry
Record the transformation period of the voltage signal of voltage transformer in described current circuitry phase；Described command operating module is for each institute
State magnetic latching relay and transmit disjunction instruction or the close command that described main control module is assigned.
Further, described A circuitry phase, B circuitry phase, C circuitry phase also include fuse or air switch.
Further, described termination also includes power module, data memory module and display keyboard circuit module, its
In, described power module for powering for the modules in described termination, described display keyboard circuit module and described
Data memory module is all connected with described main control module.
Further, described main control module also includes for the time of described timer record is carried out with Preset Time
The logic matching unit of coupling.
Further, described main control module also includes for during to the break of described magnetic latching relay or Guan Bi
Between the amending unit that is modified.
The technical scheme provided from above embodiment of the present invention, embodiment of the present invention is by load side electrical circuitry
The current signal of middle current transformer detects, and may thereby determine that the time point of current signal zero passage.By current signal mistake
The time point of zero is as the breakpoint of current phase, it is ensured that the immediate current at circuit breakpoint goes to zero, will not be in disjunction
Point produces bigger electric current.Additionally, after circuit disjunction, by target mutually in the voltage signal of voltage transformer and load
In lateral circuit, the induced electromotive force signal of voltage transformer detects, and may thereby determine that the voltage in target circuitry phase is with negative
Carrying the time point that the voltage of side induced electromotive force is equal, the closing time point that this time point is defined as target phase just can ensure that
Immediate current in target circuitry phase closing point goes to zero, and will not produce bigger electric current in closing point such that it is able to protection is used
Electricity equipment.
Further, the induced electromotive force passage over time that described load-side produces can gradually decay to 0.Electromotive force
Within first cycle that induced electromotive force produces, its waveform is consistent (namely with the voltage waveform approximation in circuitry phase in the ban
Ignore its pad value in time), load-side induced electromotive force waveform can be replaced by current phase voltage waveform approximation.For letter
Change control circuit, it may be determined that the time point that the piezoelectric voltage of target phase is equal with the voltage of current phase, this time point is defined as
The closing time point of target phase.
Accompanying drawing explanation
Fig. 1 is the voltage oscillogram in embodiment of the present invention after alternating current circuit disjunction；
Fig. 2 is the commutation process oscillogram in embodiment of the present invention from A phase to B phase；
Fig. 3 is the commutation process oscillogram in embodiment of the present invention from A phase to C phase；
Fig. 4 is the structural representation of alternate load based on stable state waveform fitting transfer termination in embodiment of the present invention
Figure；
Fig. 5 is the circuit diagram exchanging main circuit module in embodiment of the present invention.
Detailed description of the invention
For the technical scheme making those skilled in the art be more fully understood that in the present invention, real below in conjunction with the present invention
Execute the accompanying drawing in mode, the technical scheme in embodiment of the present invention is clearly and completely described, it is clear that described
Embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment party in the present invention
Formula, other embodiments all that those of ordinary skill in the art are obtained under not making creative work premise, all answer
When belonging to the scope of protection of the invention.
The present invention provides a kind of alternate load based on stable state waveform fitting to shift termination.See also Fig. 4 and
Fig. 5, described termination includes that exchange main circuit module 1, sampling module 3, command operating module 4, main control module 6 connect with communicating
Mouth die block 8, described main control module 6 is connected with described communication interface modules 8, sampling module 3, command operating module 4 respectively, described
Sampling module 3 is also connected with the described main circuit module 1 that exchanges with described command operating module 4.
In the present embodiment, described exchange main circuit module 1 includes mains side circuit, on-off circuit and load-side electricity
Road, wherein, described mains side circuit include parallel connection A circuitry phase, B circuitry phase, C circuitry phase, described on-off circuit include with
The magnetic latching relay 14,18,112 that each circuitry phase is corresponding, described load side electrical circuitry includes that current transformer 113, voltage are mutual
Sensor 114 and load-side lead-out terminal 115, described A circuitry phase, B circuitry phase, C circuitry phase structure identical, all include input
Son 11,15,19 and voltage transformer 13,17,111.
Refer to Fig. 1.In the present embodiment, the voltage signal in each circuitry phase, i.e. stable state waveform is sinusoidal wave form.
The phase place of the voltage signal in three-phase circuit is difference 120 °.At synchronization, a circuitry phase can only be had to be in closure state,
Other two circuitry phases are in disjunction state.Assume that current A circuitry phase is in closure state, B phase and C circuitry phase and is in disjunction shape
State.So when A circuitry phase is after disjunction sometime, induced electromotive force, i.e. transient-wave can be produced in load-side, in Fig. 1
Dotted line is the waveform of induced electromotive force.It is seen in fig. 1, that the induced electromotive force produced in load-side after A circuitry phase disjunction
Passage can gradually decay to 0 over time.In the present embodiment, within first cycle that induced electromotive force produces, its ripple
Shape approximates consistent (namely ignoring its pad value in time) with the voltage waveform in A circuitry phase, can use A phase voltage waveform
Approximation replaces load-side induced electromotive force waveform.So, be equivalent to, after A circuitry phase disjunction, also to continue one in load-side
The normal voltage waveform in individual cycle.
Referring to accompanying drawing 2, the moment of current signal 200 zero crossing of A circuitry phase is T0 and T2, the voltage letter of A circuitry phase
The moment of the zero crossing of numbers 100 is T1.From Figure 2 it can be seen that in the T1 moment, when voltage signal 100 zero passage, current signal 200 is also
It is not zero.Therefore, if at T1 moment disjunction A circuitry phase, then breakpoint still has bigger electric current, so can be to load
The electrical equipment of side produces infringement.In the present embodiment, in the T2 moment, namely during current signal 200 zero passage, disjunction A phase is electric
Road, the immediate current of breakpoint goes to zero.And now also produce in load side electrical circuitry as shown in phantom in Figure 2 induct electronic
Gesture.In order in B circuitry phase closing point, the induced electromotive force voltage of the voltage of mains side circuit and load side electrical circuitry can be identical,
In the T3 moment as shown in Figure 2, namely when voltage waveform 300 phase that the voltage waveform of induced electromotive force inputs with B circuitry phase
B circuitry phase is closed during friendship.So, during B circuitry phase Guan Bi, the voltage of mains side is just equal with the voltage of load-side, thus closes
The immediate current of point goes to zero.For simplified control circuit, it may be determined that the time point that the voltage of B phase is equal with the voltage of A phase,
This time point is defined as the closing time point of B phase.After B circuitry phase closes, circuit just can produce B phase current 500.
Similarly, refer to Fig. 3, after A circuitry phase disjunction, in the T4 moment, the namely induced electromotive force of load-side
When the voltage waveform 400 that voltage waveform inputs with C circuitry phase intersects, close C circuitry phase, so that the immediate current of closing point
Go to zero.For simplified control circuit, it may be determined that the time point that the voltage of C phase is equal with the voltage of A phase, by true for this time point
It is set to the closing time point of target phase.After C circuitry phase closes, circuit just can produce C phase current 600.
See also Fig. 4 and Fig. 5.In the present embodiment, described communication interface modules 8 is for receiving from current electricity mutually
The commutation instruction of road direction target circuitry phase switching, and described commutation instruction is sent to described main control module 6.For the ease of retouching
State, it is assumed that described is currently A phase mutually, and described target is B phase mutually.So, described main control module 6 will pass through sampling module and gathers institute
State the current signal of current transformer 113 in load side electrical circuitry and gather the electricity of voltage transformer 13 in described current circuitry phase
Pressure signal.
In the present embodiment, described main control module 6 includes timer and is turned on and off for controlling described timer
Chronograph control unit, described timer, for responding the control instruction of described chronograph control unit, records described load
The transformation period of the current signal of current transformer and record the electricity of voltage transformer in described current circuitry phase in lateral circuit
The transformation period of pressure signal.Specifically, when the current waveform 200 detected as shown in Figure 2 is from when just becoming 0, i.e. at T0 point, main
Control module 6 starts the disjunction Timer Program in chronograph control unit.When the voltage waveform 100 detected in Fig. 2 is by negative change
When being 0, i.e. at T1 point, main control module 6 starts the Guan Bi Timer Program in chronograph control unit.So, timer just divides
Other breaking course and closing course carrying out timing, wherein, the starting point that breaking course carries out timing is T0, enters for closing course
The starting point of row timing is T1.
In the present embodiment, in circuit, the frequency of voltage signal and current signal is 50Hz, then voltage signal and
The time span of the half period of current signal is just 10 milliseconds.So, when the break recorded in timer is equal to 10-Tr
Time, main control module 6 is by the main contacts S of command operating module 4 magnetic latching relay 14 that disjunction A circuitry phase is corresponding in advance.Its
In, Tr is the disjunction/closing time of magnetic latching relay, and representative value is 5 milliseconds, i.e. magnetic latching relay is assigned disjunction or
After person's close command, through 5 milliseconds, main contacts S just can be by circuit disjunction or Guan Bi.So, from the beginning of T0, through 5 milliseconds
Main control module 6 will pass through command operating module 4 and assigns disjunction instruction to magnetic latching relay 14, thus at the T2 point disjunction A of Fig. 2
Circuitry phase.
In the present embodiment, B circuitry phase closing course is started to count by the timer in described main control module 6 from the T1 moment
Time.Owing to the phase contrast between voltage signal and the voltage signal of B circuitry phase of A circuitry phase is 120 °, then be calculated Fig. 2
Between middle T3 moment and T1 moment, differential seat angle is 150 °, then the time difference between T1 and T3 is (150/360) × 20=8.33
Millisecond.So, when in timer for closing course timing time equal to 8.33-Tr time, described main control module 6 will pass through finger
Make operation module 4 close the main contacts S of magnetic latching relay 18 corresponding to B circuitry phase in advance, so, from the beginning of T1, pass through
3.33 milliseconds of main control modules 6 will pass through command operating module 4 and assign disjunction instruction to magnetic latching relay 18, thus Fig. 2's
T3 point Guan Bi B circuitry phase.
In the present embodiment, also similar with said process to the commutation process of C circuitry phase from A circuitry phase, only exist
During Guan Bi C circuitry phase, the time that timer calculates is different.Refer to Fig. 3, when the break etc. of record in timer
When 10-Tr, main control module 6 is touched by the master of command operating module 4 magnetic latching relay 14 that disjunction A circuitry phase is corresponding in advance
Point S.Wherein, Tr is the disjunction/closing time of magnetic latching relay, and representative value is 5 milliseconds, is i.e. assigning magnetic latching relay
After disjunction or close command, through 5 milliseconds, main contacts S just can be by circuit disjunction or Guan Bi.So, from the beginning of T0, pass through
5 milliseconds of main control modules 6 will pass through command operating module 4 and assign disjunction instruction to magnetic latching relay 14, thus at the T2 point of Fig. 2
Disjunction A circuitry phase.
In the present embodiment, C circuitry phase closing course is started to count by the timer in described main control module 6 from the T1 moment
Time.Owing to the phase contrast between voltage signal and the voltage signal of C circuitry phase of A circuitry phase is 210 °, then be calculated Fig. 3
Between middle T4 moment and T1 moment, differential seat angle is 210 °, then the time difference between T1 and T4 is (210/360) × 20=11.67
Millisecond.So, when in timer for closing course timing time equal to 11.67-Tr time, described main control module 6 will pass through
Command operating module 4 closes the main contacts S of magnetic latching relay 112 corresponding to C circuitry phase in advance.So, from the beginning of T1, pass through
6.67 milliseconds of main control modules 6 will pass through command operating module 4 and assign disjunction instruction to magnetic latching relay 112, thus Fig. 3's
T4 point Guan Bi C circuitry phase.
Therefore, described command operating module 4 is for transmitting described main control module 6 to magnetic latching relay each described
The disjunction instruction assigned or close command.
In one embodiment of the present invention, described A circuitry phase, B circuitry phase, C circuitry phase also include fuse 12,16,
110, the maximum current in each circuitry phase is limited by described fuse, when in circuit, electric current exceedes KB limit, molten
Disconnected device will fuse, thus the electronic device in protection circuit is without damage.Described fuse may be replaced by air switch.
In one embodiment of the present invention, described termination also includes power module 2, data memory module 5 and shows
Showing keyboard circuit module 7, wherein, described power module 2 is used for powering for the modules in described termination, described display
Keyboard circuit module 7 is all connected with described main control module 6 with described data memory module 5.Wherein, described display keyboard circuit mould
Block 7 as main control module 6 and extraneous interactive module, user by described display keyboard circuit module 7 to described main control module 6
Assigning various instruction, described main control module 6 displays to the user that the every of present apparatus also by described display keyboard circuit module 7
Parameter.Described data memory module 5 then stores the data that termination produces in carrying out data handling procedure.
In one embodiment of the present invention, described main control module 6 also includes for by described timer record time
Between carry out the logic matching unit that mates with Preset Time.Described logic matching unit is for different circuitry phases, presetting of setting
Time is the most different.Such as, for A circuitry phase to B circuitry phase commutation time, described logic matching unit, will be pre-for breaking course
If set of time is 5 milliseconds, so, the break once timer record reaches 5 milliseconds, and main control module 6 will pass through finger
Operation module 4 is made to assign disjunction instruction to magnetic latching relay 14, thus at the T2 point disjunction A circuitry phase of Fig. 2.Additionally, it is described
The Preset Time arranged in logic matching unit is the most also 3.33 milliseconds and 6.67 milliseconds.
In one embodiment of the present invention, described main control module 6 also includes for described magnetic latching relay
The amending unit that break or closing time are modified.Specifically, as in figure 2 it is shown, described amending unit controls timer
Record starts to ts actual time that electric current is zero from T0.Owing to the theoretical time difference of T2 point Yu T0 point is 10 milliseconds, so, dividing
During Duan, the correction time is Toff=10-ts.So from the beginning of T0 point, the magnetic latching relay 14 that A circuitry phase is corresponding is carried out
The time point of breaking operation is just 10-Tr+Toff.Same method is utilized to calculate B phase and the disjunction of C phase magnetic latching relay
Correction time.
For A phase to the Guan Bi correction time of B phase, as in figure 2 it is shown, described amending unit controls timing
Device record starts to load-side current transformer current signal by the time ts1 of liter above freezing from T1.Because T3 point and T1 point
The theoretical time difference is 8.33 milliseconds, so, the Guan Bi correction time of the magnetic latching relay that B circuitry phase is corresponding is Ton=8.33-
ts1.So from the beginning of T1 point, the magnetic latching relay that B circuitry phase is corresponding carries out the time point of closed procedure just for 8.33-Tr+
Ton.Same method is utilized to calculate " from B phase to C phase " and the Guan Bi correction time of " from C phase to A phase ".
For close from A phase to C phase the computational methods of correction time also with the above-mentioned calculation class from A phase to B phase
Seemingly.Refer to Fig. 3, described amending unit control timer record from T1 start to load-side current transformer current signal by
The time ts2 of liter above freezing.Because T4 point is 11.67 milliseconds with the theoretical time difference of T1 point, so, the magnetic that C circuitry phase is corresponding keeps
The Guan Bi correction time of relay is Ton1=11.67-ts2.So from the beginning of T1 point, the magnetic that C circuitry phase is corresponding keeps relay
Device carries out the time point of closed procedure just for 11.67-Tr+Ton.Utilize same method calculate " from C phase to B phase " and " from B phase to
A phase " the Guan Bi correction time.
The technical scheme provided from above embodiment of the present invention, embodiment of the present invention is by load side electrical circuitry
The current signal of middle current transformer detects, so that it is determined that the time point of current signal zero passage.By current signal zero passage
Time point is as the breakpoint of current phase, it is ensured that after circuit disjunction, will not produce bigger electric current at breakpoint.Additionally,
After circuit disjunction, by current phase voltage is detected, so that it is determined that the voltage of target phase is equal with current phase voltage
Time point, this time point is defined as the closing time point of target phase and just ensures to become at target circuitry phase Guan Bi electricity immediate current
In zero.
Above the describing of various embodiments of the present invention is supplied to those skilled in the art with the purpose described.This
Bright various replacements and change will be apparent from for above-mentioned technology one of ordinary skill in the art.Therefore, although
Through specifically discuss the embodiment of some alternatives, but other embodiment will be apparent from, or art technology
Personnel relatively easily draw.It is contemplated that be included in all replacements of this present invention discussed, amendment and change,
And other embodiment in the spirit and scope of above-mentioned application that falls.
Claims (5)
1. alternate load based on a stable state waveform fitting transfer termination, described termination includes exchanging main circuit mould
Block, sampling module, command operating module, main control module and communication interface modules, it is characterised in that described main control module respectively with
Described communication interface modules, sampling module, command operating module be connected, described sampling module and described command operating module also with
Described exchange main circuit module is connected, wherein:
Described exchange main circuit module includes that mains side circuit, on-off circuit and load side electrical circuitry, described mains side circuit include
The A circuitry phase of parallel connection, B circuitry phase, C circuitry phase, described on-off circuit includes that the magnetic corresponding with each circuitry phase keeps relay
Device, described load side electrical circuitry includes current transformer, voltage transformer and load-side lead-out terminal；Described A circuitry phase, B phase are electric
Road, C circuitry phase structure identical, all include input terminal and voltage transformer；
Described communication interface modules is for receiving the commutation instruction switched from current circuitry phase to target circuitry phase, and changes described
Instruction sends to described main control module mutually；
Described sampling module for gather the current signal of current transformer in described load side electrical circuitry and gather described currently
The voltage signal of voltage transformer in circuitry phase；
Described main control module includes timer and for controlling the chronograph control unit that described timer is turned on and off, described
Timer, for responding the control instruction of described chronograph control unit, records the electricity of current transformer in described load side electrical circuitry
Flow the transformation period of signal and record the transformation period of the voltage signal of voltage transformer in described current circuitry phase；
Described command operating module is for transmitting, to magnetic latching relay each described, the disjunction instruction that described main control module is assigned
Or close command.
Termination the most according to claim 1, it is characterised in that described A circuitry phase, B circuitry phase, C circuitry phase also wrap
Include fuse or air switch.
Termination the most according to claim 1, it is characterised in that described termination also includes power module, data
Memory module and display keyboard circuit module, wherein, described power module is for supplying for the modules in described termination
Electricity, described display keyboard circuit module is all connected with described main control module with described data memory module.
Termination the most according to claim 1, it is characterised in that also include in described main control module by by based on described
Time device record time carry out the logic matching unit that mates with Preset Time.
Termination the most according to claim 1, it is characterised in that also include in described main control module for described magnetic
The amending unit that the break of guard relay or closing time are modified.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610907863.6A CN106300398B (en) | 2016-10-18 | 2016-10-18 | Interphase load transfer terminal device based on steady-state waveform fitting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610907863.6A CN106300398B (en) | 2016-10-18 | 2016-10-18 | Interphase load transfer terminal device based on steady-state waveform fitting |
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| CN106300398B CN106300398B (en) | 2019-12-27 |
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Cited By (5)
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| CN107069781A (en) * | 2017-06-05 | 2017-08-18 | 泰豪科技股份有限公司 | A kind of air switch for possessing alternate load forwarding function |
| CN107086593A (en) * | 2017-06-05 | 2017-08-22 | 泰豪科技股份有限公司 | A kind of breaker for possessing alternate load forwarding function |
| CN108306315A (en) * | 2018-01-19 | 2018-07-20 | 中南大学 | A kind of low-voltage network phase change method and commutation equipment and terminal |
| CN108933444A (en) * | 2017-05-22 | 2018-12-04 | 菏泽峥艳电力科技有限公司 | Intelligent phase-change switch control circuit |
| CN111970886A (en) * | 2020-08-06 | 2020-11-20 | 贵州振华群英电器有限公司（国营第八九一厂） | Analog deputy device for double-redundancy transient pulse input |
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| CN108306315B (en) * | 2018-01-19 | 2019-09-24 | 中南大学 | A kind of low-voltage network phase change method and commutation equipment and terminal |
| CN111970886A (en) * | 2020-08-06 | 2020-11-20 | 贵州振华群英电器有限公司（国营第八九一厂） | Analog deputy device for double-redundancy transient pulse input |
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