CN104578117B - A kind of intelligent phase-selection switch and its control circuit based on power line carrier, PLC - Google Patents
A kind of intelligent phase-selection switch and its control circuit based on power line carrier, PLC Download PDFInfo
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- CN104578117B CN104578117B CN201410856979.2A CN201410856979A CN104578117B CN 104578117 B CN104578117 B CN 104578117B CN 201410856979 A CN201410856979 A CN 201410856979A CN 104578117 B CN104578117 B CN 104578117B
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- power supply
- contactor
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- microprocessor
- diode
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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 invention provides a kind of intelligent phase-selection switch and its control circuit based on power line carrier, PLC, including：Switch controller, its one end connection power supply bus, other end connection current transformer；Power supply bus is also connected with one end of contactor and diode；One end of the other end series connection auxiliary relay of diode；Contactor is in parallel with diode and auxiliary relay；The other end of auxiliary relay and diode connects current transformer；And the control circuit being made up of microprocessor, carrier communication module, sample of signal conditioning module, power supply module, relay driving module and contactor drive module.This invention simplifies intelligent phase-selection switch control circuit, also improve equipment dependability simultaneously, it is lost extremely low, without additional heat circuit, realize commutating without arcing, the life-span of contactor and auxiliary relay can greatly be extended, electric power system mutually asks that switching time is short, disclosure satisfy that the requirement of sensitive load.
Description
Technical field
The present invention relates to field of electrical equipment, more particularly to a kind of intelligent phase-selection switch based on power line carrier, PLC and its
Control circuit.
Background technology
Switch is a kind of can to make open circuit, make current interruptions or or it is flowed to the electronic component of other circuits.Most
Common switch is the electromechanical equipment for allowing people to operate, wherein having one or several electronic contacts.The closure of node represents that contact is led
It is logical, it is allowed to which that electric current flows through；The open circuit of switch represents that electronic contact is not turned on forming open circuit, does not allow electric current to flow through.
Switch is most basic in power network, and one of most important equipment, for the conducting to different load in circuit with
Disconnect, realize and the difference of circuit is controlled.Switch can be divided into a variety of different species according to its structure, the difference of purposes, its
Middle electric mechanical switch is a kind of wide variety of switch, and it is the switch using mechanical mechanism as critical piece.
Electric mechanical switch has the advantages of simple in construction, using facilitating, and disclosure satisfy that most of system is wanted to circuit control
Ask, and electric mechanical switch can also be divided into a variety of different switches according to different application circuits, demand for control, such as single control switch, double
Control switch, more-control switch etc..But electric mechanical switch also has its insufficient place, as electric mechanical switch is carrying out the operation of on-off
When, due to the limitation of itself of its mechanical structure, it is seamless that the inherent characteristic of mechanical structure make it that the switching of electric mechanical switch can not be accomplished
The switching of gap.Simultaneously when electric mechanical switch is in closure or disconnection, can also be due to vibration, the starting the arc of its contact phenomena such as and cause to touch
Hair deteriorates, electromagnetic interference and the problems such as electric energy loss, this not only limits the scope of application of electric mechanical switch, while also reduces it
Electric service life.
The Special controlling place of seamless switching is required for control, is typically opened from intelligent phase-selection switch, intelligent phase selection
Pass is that one kind is widely used in low-voltage reactive compensator, is capable of the circuit of alternative composite switch, contactor or IGCT, can
Such as higher situation of switched capacitor, sensitive load requirement of satisfaction.But there is certain deficiency, such as mesh in current correlation technique
Preceding intelligent phase-selection switch structure is more complicated, while A.C. contactor service life therein is limited, often produces the starting the arc and burns
The problem of；And if its cost, and further its complicated control circuit etc. can be raised using IGCT.
Therefore, how effectively to design one kind and disclosure satisfy that the seamless contour performance requirement of switching, while have simpler
Structure, the intelligent phase-selection switch of Applied economy just turns into urgent problem to be solved.
The content of the invention
It is an object of the invention to provide a kind of intelligent phase-selection switch and its control circuit based on power line carrier, PLC, leads to
The automatic phase selecting with electric power carrier communication technology intelligent control switch is crossed, to balance the three-phase load of low-voltage network.
The part of the present invention is a kind of intelligent phase-selection switch based on power line carrier, PLC of offer, it is characterised in that bag
Include：
Switch controller, its one end connection power supply bus, other end connection current transformer；
The other end of power supply bus connects one end of contactor and diode respectively；
One end of the other end series connection auxiliary relay of diode；
Contactor is in parallel with the diode and auxiliary relay；
The other end of auxiliary relay and diode connects current transformer；
Switch controller is by exporting respective switch signal control contactor and auxiliary relay, for controlling the choosing of power supply
Phase.
Switch controller receives control signal by carrier communication mode.
Contactor, diode and auxiliary relay are respectively multiple.
Contactor, diode and auxiliary relay are connected in the different phases of power supply.
The present invention another part be to provide a kind of control circuit of the intelligent phase-selection switch based on power line carrier, PLC,
It is characterised in that it includes：
Microprocessor, and be connected on microprocessor carrier communication module, sample of signal conditioning module, power supply
Power module, relay driving module and contactor drive module；
Carrier communication module receives phase selection switching command, and phase selection switching command is transferred into microprocessor；
Sample of signal conditioning module connects current transformer and power supply bus and is sampled, and sampled signal is passed through
Microprocessor is transferred to after conditioning；
Microprocessor is according to the phase selection switching command and sampled signal received, control relay drive module and contactor
Drive module exports corresponding switching signal；
Power supply module is microprocessor power supply.
Microprocessor by the phase selection result performed according to phase selection switching command by carrier communication module after carrier communication
Distant place network is transferred to be shown.
Power supply module connects power supply bus, obtains power supply by power supply bus and is supplied to microprocessor
Electricity.
The intelligent phase-selection switch based on power line carrier, PLC and its control circuit of the present invention has advantages below：
(1) control circuit is simplified, while it is reliable to also improve equipment as electronic power switch by using diode
Property.
(2) loss is extremely low, without additional heat circuit.
(3) commutating without arcing is realized, can greatly extend the life-span of contactor and auxiliary relay.
(4) electric power system alternate switching time is short, disclosure satisfy that the requirement of sensitive load.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the intelligent phase-selection switch based on power line carrier, PLC of the present invention and its one embodiment of control circuit
Structure chart.
Fig. 2 is the intelligent phase-selection switch based on power line carrier, PLC of the present invention and its one embodiment of control circuit
Circuit structure diagram.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached in the embodiment of the present invention
Figure, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is the present invention
Part of the embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
The every other embodiment obtained under the premise of creative work is made, belongs to the scope of protection of the invention.
Fig. 1 is the intelligent phase-selection switch based on power line carrier, PLC of the present invention and its one embodiment of control circuit
Structure chart, Fig. 2 are the intelligent phase-selection switch based on power line carrier, PLC of the present invention and its one embodiment of control circuit
Circuit structure diagram.
As shown in Figure 1 and Figure 2, the symbol in figure in circuit is that J1, J3, J5 are contactor, and J2, J4, J6 are auxiliary relay
Device, D1, D2, D3 are diode, and TA is current transformer, and K1, K2, K3, K4, K5, K6 are switching signal.
As shown in figure 1, a kind of intelligent phase-selection switch based on power line carrier, PLC of offer of the present embodiment, its feature exist
In, including：
Switch controller, its one end connection power supply bus, other end connection current transformer TA；Power supply bus
It is also respectively connected with contactor J1, J3, J5 and diode D1, D2, D3 one end；Diode D1, D2, D3 other end series connection auxiliary
Relay J2, J4, J6 one end；Contactor J1, J3, J5 are in parallel with diode D1, D2, D3 and auxiliary relay J2, J4, J6；
Auxiliary relay J2, J4, J6 and diode D1, D2, D3 other end connect current transformer；Switch controller is by exporting phase
Inductive switch signal K1, K2, K3, K4, K5, K6 control contactor J1, J3, J5 and auxiliary relay J2, J4, J6, for controlling electricity
The phase selection in source.
Specifically, contactor J1, J3, J5, diode D1, D2, D3 and auxiliary relay J2, J4, J6 are respectively multiple, and
Its number is equal, connects power supply bus, other end connection current transformer TA respectively in one end of switch controller.
The one end of power supply bus also with contactor J1, J3, J5 and diode D1, D2, D3 in parallel is in series.
Auxiliary relay J2, J4, J6 one end and diode D1, D2, D3 other end are in series, i.e. auxiliary relay J2,
J4, J6 and contactor J1, J3, J5 are in parallel.
Auxiliary relay J2, J4, J6 and contactor J1, J3, J5 other end connection current transformer TA other end.
Switch controller receives the control signal of switch by carrier communication mode, and according to received control signal
Export corresponding switching signal K1, K2, K3, K4, K5, K6 control contactor J1, J3, J5 and auxiliary relay J2, J4, J6 difference
Corresponding on or off operation is carried out, the respective selection of power supply is operated according to control signal so as to realize.
As shown in Fig. 2 a kind of control circuit of the intelligent phase-selection switch based on power line carrier, PLC of offer of the present embodiment,
It is characterised in that it includes：
Microprocessor, and be connected on microprocessor carrier communication module, sample of signal conditioning module, power supply
Power module, relay driving module and contactor drive module；
Carrier communication module receives phase selection switching command, and phase selection switching command is transferred into microprocessor；
Sample of signal conditioning module connects current transformer TA and power supply bus and is sampled, and sampled signal is passed through
Microprocessor is transferred to after crossing conditioning；
Microprocessor is according to the phase selection switching command and sampled signal received, control relay drive module and contactor
Drive module exports corresponding switching signal K1, K2, K3, K4, K5, K6；
Power supply module is microprocessor power supply.
Specifically, connect carrier communication module, sample of signal conditioning module, power supply mould respectively on the microprocessor
Block, relay driving module and contactor drive module.
Wherein, control circuit receives the phase selection switching command assigned from the control of distant place network by carrier communication module,
And the phase selection switching command received is transferred to microprocessor and handled.
Connect the current transformer TA and power supply mother in intelligent phase-selection switch respectively in sample of signal conditioning module
Line, and sampling is powered to the power supply that it is connected, loaded with measuring the Selecting phasing of current intelligent phase-selection switch and power supply
Situation, and sampled signal is transferred to microprocessor after corresponding conditioning and handled.
Microprocessor according to connecting phase selection switching command that carrier communication receives and after sampled signal carries out integrated treatment,
Control relay drive module and contactor drive module export corresponding switching signal K1, K2, K3, K4, K5, K6 to control respectively
Contactor J1, J3, J5 and auxiliary relay J2, J4, J6 processed on or off operation.
Power supply module is connected through power supply bus to obtain power supply, and the electric energy processing of acquisition is backward micro-
Processor is powered, to meet the needs of microprocessor work.
Further, microprocessor can perform corresponding phase selection according to the phase selection switching command received and operate, most red
The result of operation is transmitted back into distant place network control after carrier communication again by carrier communication module to be shown, realization pair
Reply operating result situation in operation side.
The specific works step of intelligent phase-selection switch of the present embodiment based on power line carrier, PLC is：
(1) judge whether the supply load in electric power system balances, judge to power according to voltage and current imbalance factor,
Method is：
Or
Wherein, U2 is negative sequence voltage, and I2 is negative-sequence current, and U1 is positive sequence voltage, and I1 is forward-order current.
Provided in International Power association, U% ＞ 3 or during I% ＞ 5, three-phase load unbalance can cause to power supply facilities
Unfavorable and infringement.
(2) centralized control center in the control of distant place network is judged light negative in electric power system by the size of each phase current
Lotus phase and heavy load phase, after carrying out calculating processing according to balancing the load principle and system optimizing control, produce corresponding phase selection and cut
Change order.
(3) phase selection switching command is issued to each intelligent phase selection by power line carrier, PLC mode and opened by the control of distant place network
Close.
(4) control circuit of intelligent phase-selection switch is switched to another phase by the phase selection switching command received from a phase,
It is exemplified as being switched to B phases from A phases in the present embodiment.
(5) intelligent phase-selection switch is controlled and itself cut off from A phases.Microprocessor passes through control relay drive module and contact
Device drive module exports corresponding switching signal K1, K2, K3, K4, K5, K6, and closure auxiliary relay is controlled by switching signal K2
Device J2, because contactor J1 is in closure state, there is no electric current to pass through after auxiliary relay J2 closures.It is just half in A phase voltages
Zhou Shi, switching signal K1 control contactors J1 are powered off, with the increase of contactor J1 contact distance, the voltage at contact both ends
Increase, when voltage exceedes diode D1 conducting voltage 0.7V, diode D1 conductings, and contactor J1 contact separation processes
The voltage clamping that middle contact is born is fully disconnected in below 0.7V, contactor J1 contacts in the positive half cycle of A phase voltages.When A phases electricity
Press for negative half-cycle when, switching signal K2 controls auxiliary relay J2 disconnects, anti-in the negative half-cycle of A phase voltages, diode D1
It is not turned on to biasing, without electric current by load, auxiliary relay J2 is completed to disconnect, i.e., intelligent phase-selection switch is completed from A phases
Excision process
(6) intelligent phase-selection switch controls and itself accesses B phases.Microprocessor passes through control relay drive module and contactor
Drive module exports corresponding switching signal K1, K2, K3, K4, K5, K6, by switching signal K4 control relays J4 in B phases electricity
The negative half period of pressure is powered, relay contact steady closure when B phase voltage negative half periods, due to diode D2 reverse bias,
There is no electric current during contact closure by the way that intelligent phase-selection switch is also in off-state；After B phase voltage zero passages, diode
D2 is turned on rapidly, and load begins with electric current and flowed through, and Simultaneous Switching signal K3 control contactors J3 is powered, and contactor J3 contact exists
Steady closure is completed during diode D2 forward conductions, that is, completes intelligent phase-selection switch access B phase processes.
When the present embodiment intelligent phase-selection switch accesses B phases, during contactor J3 contact closures, between contact
For distance from the ultimate range of disconnection to during complete closure, the voltage that contact is born is only diode D2 forward voltage 0.7V,
Therefore surge current or the starting the arc will not be produced.
The intelligent phase-selection switch based on power line carrier, PLC and its control circuit of the present embodiment have simple in construction, control
The advantages of facilitating, situations such as can effectively preventing surge current or the starting the arc, the normal work of intelligent phase-selection switch is protected,
Phase selection switch speed disclosure satisfy that requirement simultaneously, apply to control the circuit of sensitive load.
The intelligent phase-selection switch based on power line carrier, PLC and its control circuit of the present invention is by using diode conduct
Electronic power switch, control circuit being simplified, while also improve equipment dependability, loss is extremely low, without additional heat circuit,
Commutating without arcing is realized, can greatly extend the life-span of contactor and auxiliary relay, electric power system alternate switching time is short,
It disclosure satisfy that the requirement of sensitive load.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (2)
- A kind of 1. intelligent phase-selection switch based on power line carrier, PLC, it is characterised in that including：Switch controller, its one end connection power supply bus, other end connection current transformer；The power supply bus is also connected with one end of contactor and diode；One end of the other end series connection auxiliary relay of the diode；The contactor is in parallel with the diode and auxiliary relay；The auxiliary relay is connected the current transformer with the other end of the contactor；The switch controller controls the contactor and the auxiliary relay by exporting respective switch signal, for controlling The phase selection of power supply；The switch controller receives control signal by carrier communication mode；The contactor, diode and auxiliary relay are respectively multiple and number is equal, and are connected to the difference of power supply Xiang Shang.
- 2. a kind of control circuit of intelligent phase-selection switch based on power line carrier, PLC using described in claim 1, its feature It is, including：Microprocessor, and be connected on the microprocessor carrier communication module, sample of signal conditioning module, power supply Power module, relay driving module and contactor drive module；The carrier communication module receives phase selection switching command, and the phase selection switching command is transferred into the microprocessor；The sample of signal conditioning module connects the current transformer and power supply bus and is sampled, by sampled signal The microprocessor is transferred to after conditioning；The microprocessor controls the relay driving module according to the phase selection switching command and sampled signal that receive Corresponding switching signal is exported with contactor drive module；The power supply module is the microprocessor power supply；The microprocessor by according to the phase selection result that the phase selection switching command performs by the carrier communication module through carry Distant place network is transferred to after wave communication to be shown；The power supply module connects the power supply bus, and power supply is obtained and to described by the power supply bus Microprocessor power supply.
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| CN201410856979.2A CN104578117B (en) | 2014-12-31 | 2014-12-31 | A kind of intelligent phase-selection switch and its control circuit based on power line carrier, PLC |
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| CN201410856979.2A CN104578117B (en) | 2014-12-31 | 2014-12-31 | A kind of intelligent phase-selection switch and its control circuit based on power line carrier, PLC |
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| CN104578117B true CN104578117B (en) | 2018-02-13 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305470A (en) * | 2015-08-07 | 2016-02-03 | 北京中电博达科技有限公司 | Low-voltage load balance adjustment device for power distribution network, and automatic phase-change switch |
| CN105552937B (en) * | 2015-12-25 | 2019-04-12 | 国家电网公司 | The separate recognition methods in three-phase four-wire system network load end based on PLC technology |
| CN106211434A (en) * | 2016-07-17 | 2016-12-07 | 安徽卓越电气有限公司 | A kind of intelligent LED explosion-proof lamp drive circuit |
| CN106130046B (en) * | 2016-08-25 | 2018-08-14 | 李建新 | A kind of AC three-phase load automatic-balancing system |
| CN106207652B (en) * | 2016-08-26 | 2020-03-31 | 张红 | Sparkless switch device and electric shock prevention intelligent socket |
| CN110098627B (en) * | 2019-06-17 | 2021-05-28 | 重庆大全泰来电气有限公司 | Commutation device, method and system and three-phase power balance method and system |
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| CN201733105U (en) * | 2010-08-02 | 2011-02-02 | 重庆雷尔斯科技有限公司 | Low-voltage intelligent phase-selection switch |
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| JP3122553B2 (en) * | 1993-03-11 | 2001-01-09 | 日本碍子株式会社 | Power line switching equipment for three-phase distribution lines |
| CN202759250U (en) * | 2012-08-30 | 2013-02-27 | 万美蓉 | Rapid non-impact capacitance fling-cut switch for middling pressure reactive compensation |
| CN103259276B (en) * | 2013-06-04 | 2016-03-30 | 长沙高升电子电器科技有限公司 | Automated intelligent distribution system and distribution method |
| CN103795076A (en) * | 2014-03-05 | 2014-05-14 | 贾继莹 | Three-phase load automatic balancer and phase changing device thereof |
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| CN201860115U (en) * | 2010-06-28 | 2011-06-08 | 王海 | AC capacitor fling-cut switch circuit |
| CN201839007U (en) * | 2010-07-01 | 2011-05-18 | 山东卓尔电气有限公司 | Remote control automatic phase selecting switch |
| CN201733105U (en) * | 2010-08-02 | 2011-02-02 | 重庆雷尔斯科技有限公司 | Low-voltage intelligent phase-selection switch |
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