CN207572981U - Power-capacitance hurl-slices switch and capacitor compensation cabinet - Google Patents
Power-capacitance hurl-slices switch and capacitor compensation cabinet Download PDFInfo
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- CN207572981U CN207572981U CN201721353219.5U CN201721353219U CN207572981U CN 207572981 U CN207572981 U CN 207572981U CN 201721353219 U CN201721353219 U CN 201721353219U CN 207572981 U CN207572981 U CN 207572981U
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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
- Y02E40/30—Reactive power compensation
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Abstract
A kind of Power-capacitance hurl-slices switch and capacitor compensation cabinet, Power-capacitance hurl-slices switch include：Three relays, three zero cross detection circuits, controller and driving circuit, three relays are respectively used to connection three-phase bus and power capacitor；Three zero cross detection circuits contact portion with three relays respectively, for detecting voltage zero-crossing signal；Controller is connect with three zero cross detection circuits, receives the voltage zero-crossing signal and in driving port output drive signal；Driving circuit is connect with the coil of the controller and three relays, receives the drive signal, drives the contact closure or disconnection of three relays.Bidirectional thyristor is eliminated, using relay has been substituted for, and detect by voltage zero-cross, control relay is closed in voltage over zero.Solve the problems, such as that proof voltage, rush of current are poor, in addition, due to there was only device of the relay as conducting electric capacitor, electric energy loss is very low.
Description
Technical field
The utility model belongs to electron electric power technical field more particularly to a kind of Power-capacitance hurl-slices switch and capacitance compensation
Cabinet.
Background technology
For traditional capacitor compensation cabinet using A.C. contactor as fling-cut switch, the moment for accessing capacitance generates very big gush
Stream causes to generate spark at the contact of contactor, easily burns contact, and contact may be clung in disjunction capacitance, causes to touch
Head can not draw away.After the fling-cut switch of tradition machinery contact, there is contactless electronic switch-bidirectional thyristor, can realize
Zero cross fired, what limiting capacitance device combined floodgate generated shoves, but has larger conduction voltage drop during switching circuit operation, and electric energy is brought to damage
The problem of consumption and fever.In order to solve such switch problem, combination switch is produced.It is by bidirectional thyristor and A.C. contactor
Parallel connection is formed, and has the advantages that short zero cross fired, actuation time, limiting capacitance device inrush phenomenon, contact are not sintered, but resistance to electricity
Pressure, rush of current are poor.
Utility model content
The purpose of this utility model is to provide a kind of Power-capacitance hurl-slices switch and capacitor compensation cabinets, it is intended to solve tradition
Power-capacitance hurl-slices switch proof voltage, rush of current it is poor, the problem of high energy consumption.
A kind of Power-capacitance hurl-slices switch, including：
Three relays are respectively used to connection three-phase bus and power capacitor；
Three zero cross detection circuits, respectively with the contact portion of three relays, for detecting voltage zero-crossing signal；
Controller is connect with three zero cross detection circuits, is received the voltage zero-crossing signal and is being driven port defeated
Go out drive signal；And
Driving circuit is connect with the coil of the controller and three relays, receives the drive signal, driving
The contact closure or disconnection of three relays.
Preferably, the zero cross detection circuit includes pressure unit, power supply unit, signal amplification unit and photoelectric coupling
Device, wherein：
The input terminal of the pressure unit is connect with one end of the contact of the relay, the output terminal of the pressure unit
It is connect with the input terminal of the power supply unit and the input terminal of the signal amplification unit, the power end of the signal amplification unit
The output cathode of the power supply unit is connect, the light emitting source input of the photoelectrical coupler terminates the output of the signal amplification unit
End, the luminous source output terminal of the photoelectrical coupler connect the output negative pole of the power supply unit, and the output of the power supply unit is born
Pole connects the other end of the contact of the relay, the light-receiving device input termination power of the photoelectrical coupler, the photoelectric coupling
The light-receiving device output terminal of device terminates the controller as the output of the zero cross detection circuit.
Preferably, the power supply unit includes a rectifier bridge, a zener diode and a storage capacitor, the rectification bridge joint
The output terminal of the pressure unit, the anode of the zener diode connect the rectification as the output cathode of the power supply unit
The output cathode of bridge, cathode connect the output negative pole of the rectifier bridge, the energy storage electricity as the output negative pole of the power supply unit
Hold in parallel with the zener diode.
Preferably, the signal amplification unit includes first switch pipe and second switch pipe, the control of the first switch pipe
System terminates the output terminal of the pressure unit, and the input of the first switch pipe terminates the control terminal of the second switch pipe, institute
The input for stating second switch pipe terminates the output cathode of the power supply unit, the output terminal of the first switch pipe and described second
The output of switching tube terminates the light emitting source input terminal of the photoelectrical coupler.
Preferably, the first switch pipe and the second switch pipe are PNP triode, the first switch pipe and described
Control terminal, input terminal and the output terminal of second switch pipe are respectively the base stage of PNP triode, emitter and collector.
Preferably, it further includes：
First current-limiting resistance is connected between the light emitting source input terminal of the photoelectrical coupler and luminous source output terminal；And
Second current-limiting resistance is connected to the luminous source output terminal of the power supply unit output negative pole and the photoelectrical coupler
Between.
Preferably, it further includes：
First divider resistance, the light-receiving device output terminal of the photoelectrical coupler are grounded by first divider resistance；And
Filter capacitor, it is in parallel with first divider resistance.
Preferably, the driving circuit includes four half-bridge drive circuits, the input terminal of four half-bridge drive circuits
Connect with four of controller driving ports, in the output terminal of four half-bridge drive circuits adjacent two respectively with
The both ends connection of the coil of one relay.
Preferably, the half-bridge drive circuit include the first NPN triode, the second NPN triode, third NPN triode,
First PNP triode, the first fly-wheel diode, the second fly-wheel diode and third current-limiting resistance, wherein：
One end of the third current-limiting resistance, the cathode of the first fly-wheel diode, the collector of the first NPN triode and
The collector of two NPN triodes connects power supply, the base stage of another termination first NPN triode of third current-limiting resistance, the
The base stage of the collector of three NPN triodes and the first PNP triode, the emitter of third NPN triode, the first PNP triode
Collector and second fly-wheel diode plus earth, the emitter of first NPN triode meets the 2nd NPN
The emitter of the base stage of triode, the emitter of second NPN triode and first PNP triode connects and altogether as institute
The output terminal of half-bridge drive circuit is stated, and is connect with the anode of first fly-wheel diode and the second fly-wheel diode cathode.
In addition, a kind of capacitor compensation cabinet is additionally provided, including three-phase bus and power capacitor, including above-mentioned electric power electricity
Hold fling-cut switch, the Power-capacitance hurl-slices switch is connected between the three-phase bus and the power capacitor.
Above-mentioned Power-capacitance hurl-slices switch eliminates bidirectional thyristor on the basis of combination switch, using being substituted for
Relay, and detected by voltage zero-cross, control relay is closed in voltage over zero.Solve proof voltage, rush of current
Property it is poor the problem of, in addition, due to there was only device of the relay as conducting electric capacitor, electric energy loss is very low.
Description of the drawings
Fig. 1 is the Power-capacitance hurl-slices switch structure diagram that the utility model preferred embodiment provides；
Fig. 2 is the exemplary circuit schematic diagram of zero cross detection circuit in Power-capacitance hurl-slices switch shown in FIG. 1；
Fig. 3 is the exemplary circuit schematic diagram of driving circuit in Power-capacitance hurl-slices switch shown in FIG. 1；
Fig. 4 is the exemplary circuit schematic diagram of power supply circuit in Power-capacitance hurl-slices switch shown in FIG. 1.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention is further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Referring to Fig. 1, Power-capacitance hurl-slices switch in the utility model preferred embodiment include input terminal UA, UB,
UC meets three-phase bus A, B, C of electric system, and outlet terminal VA, VB, VC connect three terminals of three-phase power capacitance.Further include three
A relay J1, J2, J3, three zero cross detection circuits 100, controller 200, a driving circuit 300 and for providing a switch work
Make the power supply circuit 400 of power supply.
Three relays J1, J2, J3 are respectively used to connection three-phase bus A, B, C and power capacitor C, are really connected to
Between input terminal UA, UB, UC and outlet terminal VA, VB, VC；Three zero cross detection circuits 100 respectively with three relays
The contact portion of device J1, J2, J3, for detecting the alternating voltage zero-crossing signal on busbar；Controller 200 and three zero passages
Detection circuit 100 connects, and receives the voltage zero-crossing signal and in driving port output drive signal；Driving circuit 300 and institute
The coil that controller 200 is stated with three described relay J1, J2, J3 connects, and receives the drive signal, drives described in three
The contact closure or disconnection of relay J1, J2, J3.
In the present embodiment, three relays J1, J2, J3 are short using journey time, and contact is low to play small, the good magnetic guarantor of consistency
Hold relay.
Referring to Fig. 2, in the present embodiment, zero cross detection circuit 100 includes pressure unit 101, power supply unit 102, signal
Amplifying unit 103 and photoelectrical coupler 104, the input terminal of the pressure unit 101 are touched with described relay J1, J2, J3's
One end VA connections of point, the output terminal of the pressure unit 101 amplify with the input terminal of the power supply unit 102 and the signal
The input terminal connection of unit 103, the power supply of the signal amplification unit 103 terminate the output cathode of the power supply unit 102, institute
The light emitting source input for stating photoelectrical coupler 104 terminates the output terminal of the signal amplification unit 103, the photoelectrical coupler 104
Luminous source output terminal connect the output negative pole of the power supply unit 102, the output negative pole of the power supply unit 102 connects the relay
The other end UA of the contact of device J1, J2, J3, the light-receiving device input termination power of the photoelectrical coupler 104, the photoelectric coupling
The light-receiving device output terminal of device 104 connects the controller 200 as the output terminal CPA of the zero cross detection circuit 100.
Pressure unit 101 includes the divider resistance RJ1 being connected in series with and divider resistance RJ2.Power supply unit 102 includes one
Rectifier bridge, a zener diode ZD1 and a storage capacitor EC5.Rectifier bridge arranges bridge, the present embodiment for full bridge rectifier bridge or half-bridge
In for Half bridge rectifier bridge, including diode Q31A and diode Q31B, the cathode of diode Q31A and the anode of diode Q31B
The output terminal of pressure unit 101 is connect, the anode of diode Q31A is the output negative pole of rectifier bridge, and the cathode of diode Q31B is
The output cathode of rectifier bridge.The anode of the zener diode ZD1 connects described whole as the output cathode of the power supply unit 102
The output cathode of bridge is flowed, cathode connects the output negative pole of the rectifier bridge, the storage as the output negative pole of the power supply unit 102
Energy capacitance EC5 is in parallel with the zener diode ZD1.
The signal amplification unit 103 includes first switch pipe Q10 and second switch pipe Q9, the first switch pipe Q10
Control terminate the output terminal of the pressure unit 101, the input of the first switch pipe Q10 terminates the second switch pipe Q9
Control terminal, the input of the second switch pipe Q9 terminates the output cathode of the power supply unit 102, the first switch pipe
The output of the output terminal of Q10 and the second switch pipe Q9 terminate the light emitting source input terminal of the photoelectrical coupler 104.This implementation
In example, first switch pipe Q10 and the second switch pipe Q9 are PNP triode, the first switch pipe Q10 and described second
Control terminal, input terminal and the output terminal of switching tube Q9 is respectively the base stage of PNP triode, emitter and collector.
Zero cross detection circuit 100 further includes：First current-limiting resistance R30, the second current-limiting resistance R34, the first divider resistance
A RPID and filter capacitor C15.
First current-limiting resistance R30 be connected to the photoelectrical coupler 104 light emitting source input terminal and luminous source output terminal it
Between；Second current-limiting resistance R34, the light emitting source for being connected to 102 output negative pole of power supply unit and the photoelectrical coupler 104 are defeated
Between outlet.The light-receiving device output terminal of the photoelectrical coupler 104 is grounded by the first divider resistance RPID；Filter capacitor
C15 is in parallel with the first divider resistance RPID.
As shown in Fig. 2, when the coil of relay J1 does not turn on, there is the alternating current of 380V between the both ends UA and VA of electric shock,
It is depressured by divider resistance RJ1 and RJ2.Storage capacitor EC5 is power supply, as voltage VA>During UA, storage capacitor EC5 is filled
Electricity.Zener diode ZD1 makes the voltage of storage capacitor EC5 be up to 5V.Switching tube Q9, Q10 are to put voltage zero-crossing signal
Greatly, work as VA>During UA, switching tube Q10 and Q9 is obstructed, works as VA<During UA, switching tube Q10 and Q9 conducting and output voltage zero passage letter
Number.
Referring to Fig. 3, in the present embodiment, driving circuit 300 include four identical half-bridge drive circuits 301,302,
303rd, 304, the input terminal of four half-bridge drive circuits 301,302,303,304 drives with four of the controller 200
Port i1, i2, i3, i4 are connected, adjacent two in the output terminal of four half-bridge drive circuits 301,302,303,304
The both ends with the coil of a relay J1/J2/J3 are connect respectively.As shown in figure 3, the output of half-bridge drive circuit 301
The output terminal #B-/A- of end #B+ and half-bridge drive circuit 302 connects the coil of first relay J1, half-bridge drive circuit 302
The output terminal #A+/C+ of output terminal #B-/A- and half-bridge drive circuit 303 connects the coil of second relay J2, half-bridge driven electricity
The output terminal #A+/C+ on the road 303 and output terminal #C- of half-bridge drive circuit 304 connects the coil of second relay J3.
Illustrate circuit theory by taking one of half-bridge drive circuit 301 as an example, half-bridge drive circuit 301 includes the first NPN
Triode Q8, the second NPN triode Q26, third NPN triode Q7, the first PNP triodes Q30, the first fly-wheel diode,
Two fly-wheel diodes and third current-limiting resistance R10, wherein：
First fly-wheel diode and the second fly-wheel diode form double diode Q22, the third current-limiting resistance R10's
One end, the cathode of the first fly-wheel diode, the collector of the first NPN triode Q8 and the second NPN triode Q26 collector
Meet power supply, the base stage of another termination the first NPN triode Q8 of third current-limiting resistance R10, third NPN triode Q7
Collector and the first PNP triode Q30 base stage, the emitter of third NPN triode Q7, the first PNP triode Q30
The plus earth of collector and second fly-wheel diode, the emitter of the first NPN triode Q8 connect described second
The base stage of NPN triode Q26, the transmitting of the emitter of the second NPN triode Q26 and the first PNP triodes Q30
It extremely connects altogether and as the output terminal of the half-bridge drive circuit 301, and continuous with the anode of first fly-wheel diode and second
Flow diode cathode connection.
By taking half-bridge drive circuit 301 as an example, the second NPN triode Q26 and the first PNP triode Q30 constitute therein
One drive axle.Double diode Q22 is for the continuous double diode continued to employ, and when relay J1 is disconnected, bleeds off relay J1's
The aftercurrent of coil.Third NPN triode Q7 and current-limiting resistance form a level shifting circuit, the defeated of controller 200
The TTL signal of the 5V gone out, the signal for being converted into 12V are sent to drive axle.In traditional technical solution, 3 relays of driving are said,
Need 3 full-bridge circuits or 6 half-bridge circuits.In the present embodiment, we control 3 relays with 4 half-bridges, save
The cost of circuit can respectively drive 3 relays, can also make 3 relays while be attracted or disconnect.
Referring to Fig. 4, in the present embodiment, power supply circuit includes fuse F1, transformer T1, rectifier bridge BG1, diode
D9, capacitor EC1, EC2, EC10, triode Q37, zener diode ZD6 and voltage stabilizing chip U3.Fuse F1 prevents circuit different
The short circuit occurred when often.220V alternating currents are depressured to 12V by transformer T1.AC signal is become direct current signal by rectifier bridge BG1.
Capacitor EC1, EC2 are filter capacitors, filter out the ripple of circuit.Zener diode ZD6 prevents overtension from burning out circuit.Three poles
Pipe Q37 and zener diode ZD6 constitutes a regulator circuit, and voltage stabilizing chip U3 receives the voltage+V of regulator circuit output, becomes
Change 5V voltage outputs into.
In addition, a kind of capacitor compensation cabinet is additionally provided, including three-phase bus and power capacitor and above-mentioned electric capacitor
Fling-cut switch, the Power-capacitance hurl-slices switch are connected between the three-phase bus and the power capacitor.
Above-mentioned Power-capacitance hurl-slices switch eliminates bidirectional thyristor on the basis of combination switch, using being substituted for
Relay, and detected by voltage zero-cross, control relay is closed in voltage over zero.Solve proof voltage, rush of current
Property it is poor the problem of, in addition, due to there was only device of the relay as conducting electric capacitor, electric energy loss is very low.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (10)
1. a kind of Power-capacitance hurl-slices switch, which is characterized in that including：
Three relays are respectively used to connection three-phase bus and power capacitor；
Three zero cross detection circuits, respectively with the contact portion of three relays, for detecting voltage zero-crossing signal；
Controller is connect with three zero cross detection circuits, is received the voltage zero-crossing signal and is driven in the output of driving port
Dynamic signal；And
Driving circuit is connect with the coil of the controller and three relays, receives the drive signal, drives three
The contact closure or disconnection of the relay.
2. Power-capacitance hurl-slices switch as described in claim 1, which is characterized in that it is single that the zero cross detection circuit includes decompression
Member, power supply unit, signal amplification unit and photoelectrical coupler, wherein：
The input terminal of the pressure unit is connect with one end of the contact of the relay, the output terminal of the pressure unit and institute
The input terminal for stating power supply unit is connected with the input terminal of the signal amplification unit, the power supply termination institute of the signal amplification unit
The output cathode of power supply unit is stated, the light emitting source input of the photoelectrical coupler terminates the output terminal of the signal amplification unit,
The luminous source output terminal of the photoelectrical coupler connects the output negative pole of the power supply unit, and the output negative pole of the power supply unit connects
The other end of the contact of the relay, the light-receiving device input termination power of the photoelectrical coupler, the photoelectrical coupler
Light-receiving device output terminal terminates the controller as the output of the zero cross detection circuit.
3. Power-capacitance hurl-slices switch as claimed in claim 2, which is characterized in that the power supply unit include a rectifier bridge,
One zener diode and a storage capacitor, the rectification bridge the output terminal of the pressure unit, the sun of the zener diode
Pole connects the output cathode of the rectifier bridge, output of the cathode as the power supply unit as the output cathode of the power supply unit
Cathode connects the output negative pole of the rectifier bridge, and the storage capacitor is in parallel with the zener diode.
4. Power-capacitance hurl-slices switch as claimed in claim 2, which is characterized in that the signal amplification unit is opened including first
Pipe and second switch pipe are closed, the control of the first switch pipe terminates the output terminal of the pressure unit, the first switch pipe
Input terminate the control terminal of the second switch pipe, the input of the second switch pipe is terminating the output of the power supply unit just
The output of pole, the output terminal of the first switch pipe and the second switch pipe terminates the light emitting source input of the photoelectrical coupler
End.
5. Power-capacitance hurl-slices switch as claimed in claim 4, which is characterized in that the first switch pipe and described second is opened
Pipe is closed as PNP triode, control terminal, input terminal and the output terminal of the first switch pipe and the second switch pipe are respectively
The base stage of PNP triode, emitter and collector.
6. Power-capacitance hurl-slices switch as claimed in claim 2, which is characterized in that further include：
First current-limiting resistance is connected between the light emitting source input terminal of the photoelectrical coupler and luminous source output terminal；And
Second current-limiting resistance, be connected to the power supply unit output negative pole and the photoelectrical coupler luminous source output terminal it
Between.
7. Power-capacitance hurl-slices switch as claimed in claim 2, which is characterized in that further include：
First divider resistance, the light-receiving device output terminal of the photoelectrical coupler are grounded by first divider resistance；And
Filter capacitor, it is in parallel with first divider resistance.
8. Power-capacitance hurl-slices switch as described in any one of claim 1 to 7, which is characterized in that the driving circuit includes
Four half-bridge drive circuits, the input terminal of four half-bridge drive circuits are connect with four driving ports of the controller,
Two adjacent both ends respectively with the coil of a relay are connect in the output terminal of four half-bridge drive circuits.
9. Power-capacitance hurl-slices switch as claimed in claim 8, which is characterized in that the half-bridge drive circuit includes first
NPN triode, the second NPN triode, third NPN triode, the first PNP triode, the first fly-wheel diode, the second afterflow two
Pole pipe and third current-limiting resistance, wherein：
One end of the third current-limiting resistance, the cathode of the first fly-wheel diode, the first NPN triode collector and second
The collector of NPN triode connects power supply, base stage, the third of another termination first NPN triode of third current-limiting resistance
The base stage of the collector of NPN triode and the first PNP triode, the emitter of third NPN triode, first PNP triode
The plus earth of collector and second fly-wheel diode, the emitter of first NPN triode meet the 2nd NPN tri-
The emitter of the base stage of pole pipe, the emitter of second NPN triode and first PNP triode connects and altogether as described
The output terminal of half-bridge drive circuit, and connect with the anode of first fly-wheel diode and the second fly-wheel diode cathode.
10. a kind of capacitor compensation cabinet, including three-phase bus and power capacitor, which is characterized in that including claim 1 to 9 times
Power-capacitance hurl-slices switch described in one, the Power-capacitance hurl-slices switch are connected to the three-phase bus and electric power electricity
Between container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721353219.5U CN207572981U (en) | 2017-10-18 | 2017-10-18 | Power-capacitance hurl-slices switch and capacitor compensation cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721353219.5U CN207572981U (en) | 2017-10-18 | 2017-10-18 | Power-capacitance hurl-slices switch and capacitor compensation cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207572981U true CN207572981U (en) | 2018-07-03 |
Family
ID=62695723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721353219.5U Expired - Fee Related CN207572981U (en) | 2017-10-18 | 2017-10-18 | Power-capacitance hurl-slices switch and capacitor compensation cabinet |
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| Country | Link |
|---|---|
| CN (1) | CN207572981U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114101617A (en) * | 2021-11-29 | 2022-03-01 | 广东韶钢松山股份有限公司 | Non-contact relay and metallurgical continuous casting machine |
-
2017
- 2017-10-18 CN CN201721353219.5U patent/CN207572981U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114101617A (en) * | 2021-11-29 | 2022-03-01 | 广东韶钢松山股份有限公司 | Non-contact relay and metallurgical continuous casting machine |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180703 Termination date: 20181018 |
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| CF01 | Termination of patent right due to non-payment of annual fee |