CN206135427U - Alternate load transfer terminating set based on match of transient state wave form - Google Patents
Alternate load transfer terminating set based on match of transient state wave form Download PDFInfo
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- CN206135427U CN206135427U CN201621132866.9U CN201621132866U CN206135427U CN 206135427 U CN206135427 U CN 206135427U CN 201621132866 U CN201621132866 U CN 201621132866U CN 206135427 U CN206135427 U CN 206135427U
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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
Abstract
The utility model provides an alternate load transfer terminating set based on match of transient state wave form, the terminating set is including exchanging main circuit module, sampling module, instruction operation module and host system, host system respectively with sampling module, instruction operation module link to each other, the sampling module with the instruction operation module still with it links to each other to exchange main circuit module. The utility model discloses the alternate load transfer terminating set based on match of transient state wave form that embodiment provided can realize avoiding the user to have a power failure by alternate load transfer in commutation operation process fast, can divide in commutation operation breakpoint and closing point in the twinkling of an eye the electric current be fragmentary, avoid producing great impulse current, realize that alternate load steadily shifts, reduces the impact to commutation device body and consumer. The purpose is the three -phase unbalanced load through automatic adjustment distribution transformer and low pressure circuit, reduces energy losses, and the single -phase overload problem of distribution transformer is solved to less low -voltage problem.
Description
Technical field
This utility model is related to low-voltage distribution and field of energy-saving technology, more particularly to a kind of phase being fitted based on transient-wave
Between load transfer termination.
Background technology
A phase, B phase, C phase three-phase phase line and zero line are generally comprised in current low-voltage circuit, if three-phase circuit is negative
Lotus is uneven, then the electric energy loss that can cause distribution transformer and low-voltage circuit increases, and may cause low-voltage problem, very
To the single-phase winding for burning transformator.
Currently, the method that three-phase load unbalance is automatically adjusted has the alternate flying capcitor method of mains side, 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 lighter phase shunt current of the heavier opposite duty ratio of load, makes distribution low-voltage outlet three-phase current put down substantially
Weighing apparatus.The advantage of the method is that adjusting means is fairly simple, installs more convenient, has the disadvantage that distribution transformer three-phase electricity can only be adjusted
The imbalance of stream, it is impossible to adjust the three-phase current unbalance of 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 adjusted current imbalance, also adjusts voltage uneven
Weighing apparatus.The advantage of the method is multiple functional, adjusts fine, and fast response time, shortcoming is also can only to adjust distribution transformer three-phase
The imbalance of electric current, it is impossible to adjust the three-phase current unbalance of low-voltage circuit, and device power dissipation ratio itself is higher, and cost compares
It is high.
The principle of load-side load transfer method is using several automatic commutation ends for being installed on single-phase user's branched line
End, by User Part load from load it is heavier be mutually automatically transferred to the lighter phase of duty ratio, so as to 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, and the electric energy of circuit can be reduced again
Loss, and cost is than relatively low.
At present conventional alternate load transfer method is using zero passage phase-selecting method, i.e., in ABC three-phase circuits, to work as load
Disjunction phase during the current waveform zero passage of heavier current phase, closes when the lighter target phase voltage waveform zero passage of duty ratio
The phase.The problem of the method is, due to circuit disjunction after, there is induced electromotive force in load side electrical circuitry, when target phase voltage mistake
When zero, the voltage of closing point is simultaneously not zero, circuit closure moment, and the larger electric current of meeting producing ratio is produced to electrical equipment or electrical equipment
Life is than larger impact, or produces switching overvoltage, affects normally using for electrical equipment, or causes the quality of power supply to decline.
Utility model content
The purpose of this utility model embodiment is to provide a kind of alternate load transfer being fitted based on transient-wave eventually
End device, can quickly realize alternate load transfer, it is to avoid user has a power failure in commutation operating process；Can be in commutation operation
Breakpoint and closing point immediate current are equal to zero, it is to avoid produce larger dash current, realize alternate load smooth transfer, reduce
Impact to commutation device body and electrical equipment.Purpose is born by the three-phase of adjust automatically distribution transformer and low-voltage circuit
Lotus is uneven, reduces electric energy loss, and less low-voltage problem solves the problems, such as distribution transformer one-phase overload.
For achieving the above object, this utility model provides a kind of alternate load transfer terminal dress being fitted based on transient-wave
Put, the termination includes exchange main circuit module, sampling module, command operating module and main control module, the master control mould
Block is connected respectively with the sampling module, command operating module, the sampling module and the command operating module also with it is described
Exchange main circuit module is connected, wherein：The exchange main circuit module includes power supply lateral circuit, on-off circuit and load-side electricity
Road, the power supply lateral circuit includes A circuitry phases, B circuitry phases, C circuitry phases in parallel, and the on-off circuit includes and each phase electricity
The corresponding bidirectional triode thyristor in parallel in road and magnetic latching relay, wherein, each bidirectional triode thyristor is connected with control circuit, institute
Load side electrical circuitry is stated including current transformer, voltage transformer and load-side lead-out terminal；The A circuitry phases, B circuitry phases, C phases
The structure of circuit is identical, including input terminal and voltage transformer；The sampling module is used to gather the load side electrical circuitry
The voltage signal of voltage transformer in the current signal and the collection current circuitry phase of middle current transformer；The instruction behaviour
Make module for transmitting the conducting triggering command that the main control module is assigned, the finger to the control circuit of each bidirectional triode thyristor
Operation module is made to be additionally operable to transmit disjunction instruction or the close command that the main control module is assigned to each magnetic latching relay.
Further, the A circuitry phases, B circuitry phases, C circuitry phases also include fuse or air switch.
Further, the termination also includes power module, data memory module and display keyboard circuit module, its
In, the power module is used to be powered for the modules in the termination, the display keyboard circuit module and described
Data memory module is connected with the main control module.
Further, the control circuit of the bidirectional triode thyristor is passing zero trigger and the circuit for crossing zero to cut-off.
Further, the termination also includes the communication interface modules being connected with the main control module, the communication
Interface module is used to receive the commutation instruction switched from current circuitry phase to target circuitry phase, and commutation instruction is sent extremely
The main control module.
The technical scheme provided from above this utility model embodiment, this utility model embodiment is by negative
The current signal for carrying current transformer in lateral circuit detected and using the operating characteristic of bidirectional triode thyristor, such that it is able to
To currently mutually carrying out disjunction during current signal zero passage.Additionally, after circuit disjunction, by voltage transformer in target phase and
The voltage signal of voltage transformer is detected and using the work of bidirectional triode thyristor and its control circuit in load side electrical circuitry
Characteristic, such that it is able to the voltage in target circuitry phase it is equal with the voltage of load-side induced electromotive force when, by target circuitry phase
Closure, it is ensured that be equal to zero in the immediate current of target circuitry phase closing point.So just will not produce in the line larger
Dash current such that it is able to protect electrical equipment.
Description of the drawings
Fig. 1 is the voltage oscillogram in this utility model embodiment after alternating current circuit disjunction；
Fig. 2 is from A phases to the commutation process oscillogram of B phases in this utility model embodiment；
Fig. 3 is from A phases to the commutation process oscillogram of C phases in this utility model embodiment；
Fig. 4 is to shift the structure of termination based on the alternate load of transient-wave fitting in this utility model embodiment
Schematic diagram；
Fig. 5 is the circuit diagram that main circuit module is exchanged in this utility model embodiment.
Specific embodiment
In order that those skilled in the art more fully understand the technical scheme in this utility model, below in conjunction with this reality
With the accompanying drawing in new embodiment, the technical scheme in this utility model embodiment is clearly and completely described, is shown
So, described embodiment is only a part of embodiment of this utility model, rather than the embodiment of whole.Based on this
Embodiment in utility model, it is all that those of ordinary skill in the art are obtained under the premise of creative work is not made
Other embodiment, should all belong to the scope of this utility model protection.
This utility model provides a kind of alternate load transfer termination being fitted based on transient-wave.Referring to accompanying drawing 4,5,
The termination includes exchange main circuit module 1, sampling module 3, command operating module 4, main control module 6 and communication interface mould
Block 8, the main control module 6 is connected respectively with the communication interface modules 8, sampling module 3, command operating module 4, the sampling
Module 3 and the command operating module 4 are also connected with the main circuit module 1 that exchanges.
In the present embodiment, the exchange main circuit module 1 includes power supply lateral circuit, on-off circuit and load-side electricity
Road, wherein, the power supply lateral circuit includes A circuitry phases, B circuitry phases, C circuitry phases in parallel, the on-off circuit include with
The corresponding bidirectional triode thyristor 14,19,114 in parallel of each circuitry phase and magnetic latching relay 15,110,115, wherein, each pair
It is connected with control circuit to controllable silicon.The control circuit is used to control corresponding bidirectional triode thyristor on or off.It is described negative
Carrying lateral circuit includes current transformer 116, voltage transformer 117 and load-side lead-out terminal 118, the A circuitry phases, B phases electricity
Road, C circuitry phases structure it is identical, including input terminal 11,16,111 and voltage transformer 13,18,113.In this embodiment party
In formula, the control circuit of the bidirectional triode thyristor is passing zero trigger and the circuit for crossing zero to cut-off.
Refer to Fig. 1.In the present embodiment, the voltage signal in each circuitry phase is sinusoidal wave form.In three-phase circuit
Voltage signal phase place for difference 120 °.In synchronization, there can only be a circuitry phase in closure state, other two phases
Circuit is in disjunction state.Assume that current A circuitry phases are in disjunction state in closure state, B phases and C circuitry phases.So work as A
Circuitry phase can produce induced electromotive force after sometime disjunction in load-side, and the dotted line in Fig. 1 is the ripple of induced electromotive force
Shape.From figure 1 it appears that the induced electromotive force produced in load-side after A circuitry phase disjunctions elapse over time can be gradually
Decay to 0.
Accompanying drawing 2 is referred to, the moment of the zero crossing of current signal 200 of A circuitry phases is T0 and the voltage letter of T2, A circuitry phase
The moment of numbers 100 zero crossing is T1.From Figure 2 it can be seen that at the T1 moment, when 100 zero passage of voltage signal, current signal 200 is simultaneously
It is not zero.Therefore, if in T1 moment disjunction A circuitry phases, then breakpoint still has larger electric current.In present embodiment
In, can be at the T2 moment, that is, disjunction A circuitry phases during 200 zero passage of current signal, the immediate current of breakpoint is equal to zero.And
Induced electromotive force as shown in phantom in Figure 2 now can also be produced in load side electrical circuitry.In order in B circuitry phase closing points,
The voltage of power supply lateral circuit can be identical with the induced electromotive force voltage of load side electrical circuitry, can at the T3 moment as shown in Figure 2,
B circuitry phases are namely closed when the voltage waveform 300 that the voltage waveform of induced electromotive force is input into B circuitry phases intersects.So,
When B circuitry phases are closed, the voltage of mains side is equal with the voltage of load-side, so as to the immediate current of closing point is equal to zero.In B phases
After closing of circuit, B phase currents 500 just can be produced in circuit.
Similarly, refer to Fig. 3, after A circuitry phase disjunctions, can at the T4 moment, that is, load-side induct it is electronic
When the voltage waveform 400 that the voltage waveform of gesture is input into C circuitry phases intersects, C circuitry phases are closed, so that the moment of closing point
Electric current is equal to zero.After C circuitry phases closure, C phase currents 600 just can be produced in circuit.
Referring to accompanying drawing 4,5.In the present embodiment, the communication interface modules 8 is used to receive from current circuitry phase to mesh
The commutation instruction of mark circuitry phase switching, and commutation instruction is sent to the main control module 6.It is assumed for convenience of description that
The current phase is A phases, and the target is mutually B phases.So, the main control module 6 will pass through sampling module and gather the load
The current signal of current transformer 116 and the voltage letter of voltage transformer 13 in the current circuitry phase is gathered in lateral circuit
Number.
In the present embodiment, when disjunction is carried out to A circuitry phases, the load side electrical circuitry is gathered by sampling module 3
The voltage signal of voltage transformer 13 in the current signal and the collection current circuitry phase of middle current transformer 116.Work as inspection
Measure current waveform 200 as shown in Figure 2 from be just changed into 0 when (T0 points i.e. in fig. 2), due to the control of bidirectional triode thyristor 14
Circuit has a characteristic of passing zero trigger, therefore when electric current is 0, and then bidirectional triode thyristor 14 is triggered and leads for its control circuit conducting
It is logical.After bidirectional triode thyristor 14 is turned on, main control module 6 will pass through command operating module 4 and assign point to magnetic latching relay 15
Severed finger makes, so as to the main contacts S and auxiliary node K of disjunction magnetic latching relay 15.So, A circuitry phases will pass through two-way controllable
Silicon 14 is turned on.
In the present embodiment, when the current waveform 200 in detecting Fig. 2 from it is negative be changed into 0 when (i.e. in the T2 points of Fig. 2),
Main control module 6 can assign cutoff command by command operating module 4 to the control circuit of bidirectional triode thyristor 14.So, in Fig. 2
The zero crossing T2 moment of current waveform 200, bidirectional triode thyristor 14 and its control circuit due to the characteristic with zero to cut-off, so as to
Can end.So, A circuitry phases just can the disjunction in 200 zero passage of current waveform.
In the present embodiment, when closed procedure is carried out to B circuitry phases, main control module 6 must be in the corresponding magnetic of A circuitry phases
Guard relay 15 be in disjunction state, and the electric current of load-side current transformer 116 be 0 when, by command operating module 4
Control circuit to bidirectional triode thyristor 19 assigns turn-on command, because the control circuit of bidirectional triode thyristor 19 has passing zero trigger
Characteristic, so when mains side voltage is identical with load-side induced electromotive force voltage in T3 moment, B circuitry phases, loading on two-way
The voltage at the control circuit two ends of controllable silicon 19 is identical, i.e., both end voltage is zero, the conducting of the control circuit of bidirectional triode thyristor 19 from
And make bidirectional triode thyristor 19 be triggered conducting.So, B circuitry phases just can be powered.Subsequently, main control module 6 can be by instruction
Operation module 4 to magnetic latching relay 110 assigns close command, such that it is able in the main contacts S of magnetic latching relay 110 and auxiliary
After helping node K closures, the control circuit of disjunction bidirectional triode thyristor 19, so, bidirectional triode thyristor 19 and its control circuit are just in mistake
Zero point is ended.B circuitry phases can be persistently powered by magnetic latching relay 110.
The commutation operating process of above-mentioned " from A phases to B phases " is equally applicable to " from B phases to C phases " and " from C phases to A phases "
The commutation operation that 120 ° of biphase phase contrast.
For the commutation behaviour of 240 ° of the biphase phase contrast of " from A phases to C phases ", " from C phases to B phases " and " from B phases to A phases "
Make, its breaking course is consistent with above-mentioned breaking course, and as a example by from A phases to C phases, its closing course is as described below：
Fig. 3 is referred to, main control module 6 must be in disjunction state in the corresponding magnetic latching relay 15 of A circuitry phases, and bear
When the electric current for carrying side current transformer 116 is 0, is assigned to the control circuit of bidirectional triode thyristor 114 by command operating module 4 and led
Logical instruction, because the control circuit of bidirectional triode thyristor 114 has the characteristic of passing zero trigger, so the electricity in T4 moment, C circuitry phases
When Source side voltage is identical with load-side induced electromotive force voltage, the voltage at the control circuit two ends of bidirectional triode thyristor 114 is loaded on
Identical, i.e., both end voltage is zero, and the conducting of the control circuit of bidirectional triode thyristor 114 is triggered conducting so as to bidirectional triode thyristor 114.This
Sample, C circuitry phases just can be powered.Subsequently, main control module 6 can be assigned by command operating module 4 to magnetic latching relay 115
Close command, such that it is able to the main contacts S and auxiliary node K of magnetic latching relay 115 closure after, disjunction bidirectional triode thyristor
114 control circuit, so, bidirectional triode thyristor 114 and its control circuit are just ended in zero crossing.C circuitry phases can be protected by magnetic
Hold relay 115 to be persistently powered.
Therefore, the command operating module 4 is used to transmit the master control to the control circuit of each bidirectional triode thyristor
The conducting triggering command that module is assigned, the command operating module is additionally operable to transmit the master control mould to each magnetic latching relay
Disjunction instruction or close command that block is assigned.
In one embodiment of this utility model, the A circuitry phases, B circuitry phases, C circuitry phases also include fuse 12,
17th, 112, the fuse can be limited the maximum current in each circuitry phase, when electric current exceedes maximum restriction in circuit
During value, fuse will fuse, so as to the electronic device in protection circuit is without damage.The fuse may be replaced by sky
Air cock.
In one embodiment of this utility model, the termination also includes power module 2, data memory module 5
With show keyboard circuit module 7, wherein, the power module 2 is used to be powered for the modules in the termination, described
Show that keyboard circuit module 7 and the data memory module 5 are connected with the main control module 6.Wherein, the display keyboard electricity
, used as main control module 6 and extraneous interactive module, user is by the display keyboard circuit module 7 to the master control for road module 7
Module 6 assigns various instructions, and the main control module 6 displays to the user that present apparatus also by the display keyboard circuit module 7
Parameters.The data memory module 5 then stores the data that termination is produced in data handling procedure is carried out.
The technical scheme provided from above this utility model embodiment, this utility model embodiment is by negative
The current signal for carrying current transformer in lateral circuit is detected and special using the work of bidirectional triode thyristor and its control circuit
Property, so as in current signal zero passage to currently mutually carrying out disjunction.Additionally, after circuit disjunction, by electricity in target phase
The voltage signal of voltage transformer is detected and using bidirectional triode thyristor and its control in pressure transformer and load side electrical circuitry
The operating characteristic of circuit, so as to the voltage in target circuitry phase it is equal with the voltage of load-side induced electromotive force when, by target
Circuitry phase is closed, and is zero so in closing point immediate current, just will not in the line produce greater impact electric current such that it is able to protect
Shield electrical equipment.
Description to various embodiments of the present utility model above is supplied to those skilled in the art with the purpose for describing.
Various replacements of the present utility model and change will be apparent for above-mentioned technology one of ordinary skill in the art.Cause
This, although the embodiment of some alternatives has been specifically discuss, but other embodiment will be apparent, Huo Zheben
Art personnel relatively easily draw.What this utility model was intended to be included in that this had discussed of the present utility model all replaces
Generation, modification and change, and the other embodiment in the spirit and scope of above-mentioned application that falls.
Claims (5)
1. a kind of alternate load being fitted based on transient-wave shifts termination, and the termination includes exchange main circuit mould
Block, sampling module, command operating module and main control module, it is characterised in that the main control module respectively with the sampling module,
Command operating module is connected, and the sampling module and the command operating module are also connected with the main circuit module that exchanges, its
In：
The exchange main circuit module includes power supply lateral circuit, on-off circuit and load side electrical circuitry, and the power supply lateral circuit includes
In parallel A circuitry phases, B circuitry phases and C circuitry phases, the on-off circuit includes corresponding with each circuitry phase in parallel two-way
Controllable silicon and magnetic latching relay, wherein, each bidirectional triode thyristor is connected with control circuit, and the load side electrical circuitry includes electric current
Transformer, voltage transformer and load-side lead-out terminal；The A circuitry phases, B circuitry phases, C circuitry phases structure it is identical, wrap
Include input terminal and voltage transformer；
The sampling module is described current for gathering the current signal of current transformer and collection in the load side electrical circuitry
The voltage signal of voltage transformer in circuitry phase；
The command operating module is used to transmit the conducting that the main control module is assigned to the control circuit of each bidirectional triode thyristor
Triggering command, the disjunction that the command operating module is additionally operable to be assigned to each magnetic latching relay transmission main control module refers to
Order or close command.
2. termination according to claim 1, it is characterised in that the A circuitry phases, B circuitry phases, C circuitry phases are also wrapped
Include fuse or air switch.
3. termination according to claim 1, it is characterised in that the termination also includes power module, data
Memory module and display keyboard circuit module, wherein, the power module is used to be supplied for the modules in the termination
Electricity, the display keyboard circuit module and the data memory module are connected with the main control module.
4. termination according to claim 1, it is characterised in that the control circuit of the bidirectional triode thyristor is led for zero passage
Circuit that is logical and crossing zero to cut-off.
5. termination according to claim 1, it is characterised in that the termination also includes and the main control module
Connected communication interface modules, the communication interface modules is used to receive the commutation switched from current circuitry phase to target circuitry phase
Instruction, and commutation instruction is sent to the main control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621132866.9U CN206135427U (en) | 2016-10-18 | 2016-10-18 | Alternate load transfer terminating set based on match of transient state wave form |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621132866.9U CN206135427U (en) | 2016-10-18 | 2016-10-18 | Alternate load transfer terminating set based on match of transient state wave form |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206135427U true CN206135427U (en) | 2017-04-26 |
Family
ID=58573555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621132866.9U Expired - Fee Related CN206135427U (en) | 2016-10-18 | 2016-10-18 | Alternate load transfer terminating set based on match of transient state wave form |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206135427U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451500A (en) * | 2016-10-18 | 2017-02-22 | 泰豪科技股份有限公司 | Inter-phase load transfer terminal device based on transient waveform fitting |
| US11626720B1 (en) * | 2022-05-20 | 2023-04-11 | Neilsen-Kuljian, Inc. | Multiphase ground fault circuit interrupter |
-
2016
- 2016-10-18 CN CN201621132866.9U patent/CN206135427U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451500A (en) * | 2016-10-18 | 2017-02-22 | 泰豪科技股份有限公司 | Inter-phase load transfer terminal device based on transient waveform fitting |
| CN106451500B (en) * | 2016-10-18 | 2019-12-27 | 泰豪科技股份有限公司 | Interphase load transfer terminal device based on transient waveform fitting |
| US11626720B1 (en) * | 2022-05-20 | 2023-04-11 | Neilsen-Kuljian, Inc. | Multiphase ground fault circuit interrupter |
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