CN108832643A - A kind of commutation system of intelligence phase-change switch - Google Patents
A kind of commutation system of intelligence phase-change switch Download PDFInfo
- Publication number
- CN108832643A CN108832643A CN201810771595.9A CN201810771595A CN108832643A CN 108832643 A CN108832643 A CN 108832643A CN 201810771595 A CN201810771595 A CN 201810771595A CN 108832643 A CN108832643 A CN 108832643A
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- Prior art keywords
- switch
- phase
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- stationary contact
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—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
-
- 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 invention discloses a kind of commutation systems of intelligent phase-change switch, it is switched including first switch, second switch and third, the stationary contact connection A phase and the 6th switch of the first switch, another stationary contact connection B phase and the 7th switch of first switch, one stationary contact of the movable contact connection second switch of first switch, another stationary contact connection C phase and the 8th switch of second switch, the 9th switch of other end connection of the 6th switch, the tenth switch of other end connection of the 7th switch.Logic of the present invention is realized simply, can be realized zero voltage turn-off, zero current passing, load power-off time is shorter, and implementation cost is lower, can effectively solve the problem that the control problem of power distribution station three-phase load rebalancing.
Description
Technical field
The present invention relates to field of power transmission, the commutation system of specifically a kind of intelligence phase-change switch.
Background technique
Chinese Mountain Areas region is wide, power consumer is numerous and relatively disperses, and it is unbalanced single-phase that there are a large amount of spatial and temporal distributions
Load causes most power distribution stations to there are problems that different degrees of three-phase load unbalance.Three-phase load unbalance is to allocated radio
The influence in area mainly includes 4 aspects：1）Distribution transformer and line loss is caused to increase；2）The confession of heavily loaded phase in power distribution station
Piezoelectric voltage quality is greatly reduced；3）Causing the power output of distribution transformer reduces, energy conversion efficiency decline；4）Three-phase load is uneven
Weighing apparatus operation causes distribution transformer zero-sequence current to increase, and caused eddy-current loss increases distribution transformer running temperature, jeopardizes
Its safety and service life.Therefore, it realizes the rebalancing of power distribution station three-phase load, improves power distribution station economic operation level and power supply
Quality of voltage is urgent problem.
Summary of the invention
The purpose of the present invention is to provide a kind of commutation systems of intelligent phase-change switch, to solve to mention in above-mentioned background technique
Out the problem of.
To achieve the above object, the present invention provides the following technical solutions：
A kind of commutation system of intelligence phase-change switch, including first switch, second switch and third switch, the first switch
One stationary contact connection A phase and the 6th switch, another stationary contact connection B phase and the 7th switch of first switch, first switch
Movable contact connection second switch a stationary contact, second switch another stationary contact connection C phase and the 8th switch, the 6th
The 9th switch of other end connection of switch, the tenth switch of other end connection of the 7th switch, the other end connection the of the 8th switch
11 switches, the other end of movable contact connection the 4th switch and third switch of second switch, the other end connection of the 4th switch
The other end of 5th switch.
As further technical solution of the present invention：4th switch, the 6th switch, the 7th switch and the 8th switch are equal
For bidirectional thyristor.
As further technical solution of the present invention：Third switch, the 5th switch, the 9th switch, the tenth switch and
11st switch is common relay.
As further technical solution of the present invention：The single-pole double-throw relay of the first switch and the second switch.
As further technical solution of the present invention：The other end of the tenth switch of other end connection of 9th switch,
The other end of 11st switch, the other end of third switch, the 5th switch and firewire L.
Compared with prior art, the beneficial effects of the invention are as follows：Logic of the present invention is realized simply, can be realized no-voltage pass
Disconnected, zero current passing, load power-off time is shorter, and implementation cost is lower, can effectively solve the problem that power distribution station three-phase load is put down again
The control problem of weighing apparatus.
Detailed description of the invention
Fig. 1 is topology diagram of the invention.
Fig. 2 is the circuit diagram of state 1 of the present invention.
Fig. 3 is the circuit diagram of state 2 of the present invention.
Fig. 4 is the circuit diagram of state 3 of the present invention.
Fig. 5 is the circuit diagram of state 4 of the present invention.
Fig. 6 is the circuit diagram of state 5 of the present invention.
Fig. 7 is the circuit diagram of state 6 of the present invention.
Fig. 8 is the circuit diagram of state 7 of the present invention.
Fig. 9 is the circuit diagram of state 8 of the present invention.
Figure 10 is the circuit diagram of state 9 of the present invention.
Figure 11 is the circuit diagram of state 10 of the present invention.
Figure 12 is the waveform diagram that Figure 12 is negative phase sequence switching front and back.
Figure 13 is the handoff procedure figure of zero voltage turn-off zero current passing.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-3 is please referred to, number 1-10 is corresponding in turn to the switch of first switch-the ten, embodiment 1 in figure：A kind of intelligence is changed
Mutually the commutation system of switch, the test point of voltage and current are as shown in Figure 1.Thyristor and relay all regard switch as.When first
Switch disconnects, and second switch disconnects, and indicates that A is connected；When first switch is closed, second switch is disconnected, and indicates that B is connected；When
Second switch closure indicates that C is connected.Positive phase sequence switching includes that A phase is switched to B phase, B phase is switched to C phase and C phase switches
To A phase.Negative phase sequence switching includes that B phase is switched to A phase, C phase is switched to B phase and A phase is switched to C phase.Negative phase sequence switching conversion
For the switching of positive phase sequence twice, the time interval switched twice is greater than 60s.Such as B phase switches to A phase, is converted into B phase and is switched to C
Phase waits 60s or more, then is switched to A phase by C phase.
Positive phase sequence handoff procedure illustrates that other handoff procedures are similar so that A phase is switched to the process of B phase as an example.
1. state 1：Third closes the switch, and rest switch disconnects.Corresponding diagram 2.
2. state 2：Ensure initial position in the A phase by feedback contact, if the 4th switch, the 5th switch in 12ms
Between the 7th switch, the tenth switch between there is no voltage, then be closed the 5th switch and the tenth switch.If a failure occurs, failure
Operation：Without operation, it is directly parked in state 1.State at this time：Third switch, the 5th switch and the tenth close the switch, remaining disconnection,
Corresponding diagram 2.
3. state 3：Wait 10ms time, the 4th switch of closure and disjunction third switch.Third is judged by feedback contact
Whether switch disjunction succeeds, such as faulty, disconnects the 5th switch and the tenth switch, moves back the state of being rolled into 2.State at this time：4th opens
It closes, the 5th switch and the tenth closes the switch, remaining disconnection, corresponding diagram 4.
4. state 4：The pulse of the 4th switch of block first（Disconnect the 4th switch）.When failure, disconnects the 4th and switch and close
Third switch is closed, the state of being rolled into 3 is moved back.State at this time：5th switch, the tenth close the switch, other disconnections, corresponding diagram 5.
5. state 5：In the electric current of thick line position detection load, zero crossing thyristor turns off naturally, load power down.Closure the
Seven switches, wait voltage over zero to be connected naturally.When failure, the 4th switch of closure moves back the state of being rolled into 4.State at this time：5th opens
Pass, the 7th switch, the tenth close the switch, remaining disconnection, corresponding diagram 6.
6. state 6：First switch closure.Judge whether 1 moving contact of steady-state relay switches correctly.Otherwise, reverse reduction
Its initial operating state.State at this time：First switch, the 5th switch, the 7th switch, the tenth close the switch, remaining disconnection is corresponding
Fig. 7.
7. state 7：By NOR gate circuit in thick line position comparison voltage.As being mutually closed the 4th switch.Otherwise, inversely
Restore its original state.When failure, 1 is disconnected, the state of being rolled into 6 is moved back.State at this time：First switch, the 4th switch, the 5th switch,
7th switch, the tenth close the switch, remaining disconnection.Corresponding diagram 8.
8. state 8：The switch of disjunction the 7th and the tenth switch.Load at this time passes through the 4th switch, the power supply of third switching branches.
When failure is grasped, the 4th switch is disconnected, the state of being rolled into 7 is moved back.State at this time：First switch, the 4th switch, the 5th close the switch,
Remaining disconnection, corresponding diagram 9.
9. state 9：It is closed third switch, confirms that third closes the switch by feedback contact.The 7th switch of closure when failure
With the tenth switch, the state of being rolled into 8 is moved back.State at this time：First switch, third switch, the 4th switch, the 5th close the switch, other
It disconnects, corresponding diagram 10.
10. state 2：Disconnect the 4th switch, the 5th switch.Third switch is disconnected when failure, moves back the state of being rolled into 9.Shape at this time
State：First switch, third close the switch, other disconnections, corresponding diagram 11.
According to this logic, zero voltage turn-off, zero current passing may be implemented.
Embodiment 2：On the basis of embodiment 1, the 4th switch, the 6th switch, the 7th switch and the of the design
Eight switches are bidirectional thyristor.Third switch, the 5th switch, the 9th switch, the tenth switch and the 11st switch for commonly after
Electric appliance.The single-pole double-throw relay of first switch and the second switch, using above-mentioned switch, not only production cost is low, but also uses
Convenient, easy to operate, stability is good.
This user specific embodiment：1. the degree of unbalancedness of three-phase current is detected, if degree of unbalancedness>15%, phase
Degree of unbalancedness after sequence switching decline than current degree of unbalancedness, and when electric current is between 1A to 50A, allows phase-change switch progress
Institute's on-load is switched in load minimum phase by automatic commutation from current phase.
2. arriving the logic of state 10 according to above-mentioned state 1, commutation switching is carried out.Negative phase sequence switching will be converted into two minor ticks
Positive phase sequence switching not less than 60s；
3. detecting degree of unbalancedness again after the completion of switching, if degree of unbalancedness does not decline, returning to original state down；
4. not allowing to switch again within 2s after the completion of switching.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (5)
1. a kind of commutation system of intelligence phase-change switch, including first switch, second switch and third switch, which is characterized in that
The stationary contact connection A phase and the 6th switch of the first switch, another stationary contact of first switch connect B phase and the 7th
Switch, first switch movable contact connection second switch a stationary contact, second switch another stationary contact connection C phase and
8th switch, the 9th switch of other end connection of the 6th switch, the tenth switch of other end connection of the 7th switch, the 8th switch
The 11st switch of other end connection, the other end of movable contact connection the 4th switch and third switch of second switch, the 4th switch
The other end connection the 5th switch the other end.
2. a kind of commutation system of intelligent phase-change switch according to claim 1, which is characterized in that the 4th switch,
6th switch, the 7th switch and the 8th switch are bidirectional thyristor.
3. a kind of commutation system of intelligent phase-change switch according to claim 1, which is characterized in that the third switch,
5th switch, the 9th switch, the tenth switch and the 11st switch are common relay.
4. a kind of commutation system of intelligent phase-change switch according to claim 2, which is characterized in that the first switch and
The single-pole double-throw relay of second switch.
5. a kind of commutation system of intelligent phase-change switch according to claim 3, which is characterized in that the 9th switch
The other end, the 5th switch and the firewire that the other end of the tenth switch of other end connection, the other end of the 11st switch, third switch
L。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810771595.9A CN108832643A (en) | 2018-07-13 | 2018-07-13 | A kind of commutation system of intelligence phase-change switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810771595.9A CN108832643A (en) | 2018-07-13 | 2018-07-13 | A kind of commutation system of intelligence phase-change switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108832643A true CN108832643A (en) | 2018-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810771595.9A Withdrawn CN108832643A (en) | 2018-07-13 | 2018-07-13 | A kind of commutation system of intelligence phase-change switch |
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| CN (1) | CN108832643A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110266025A (en) * | 2019-07-03 | 2019-09-20 | 青岛鼎信通讯股份有限公司 | A kind of three-phase intelligent phase-change switch device and control method optimizing switch topology |
| CN110380435A (en) * | 2019-07-10 | 2019-10-25 | 浙江九社电气有限公司 | A kind of high-voltage high-speed phase-change switch |
-
2018
- 2018-07-13 CN CN201810771595.9A patent/CN108832643A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110266025A (en) * | 2019-07-03 | 2019-09-20 | 青岛鼎信通讯股份有限公司 | A kind of three-phase intelligent phase-change switch device and control method optimizing switch topology |
| CN110380435A (en) * | 2019-07-10 | 2019-10-25 | 浙江九社电气有限公司 | A kind of high-voltage high-speed phase-change switch |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181116 |
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| WW01 | Invention patent application withdrawn after publication |