CN207833270U - A kind of thyristor automatic Regulation tap switch - Google Patents
A kind of thyristor automatic Regulation tap switch Download PDFInfo
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- CN207833270U CN207833270U CN201721839090.9U CN201721839090U CN207833270U CN 207833270 U CN207833270 U CN 207833270U CN 201721839090 U CN201721839090 U CN 201721839090U CN 207833270 U CN207833270 U CN 207833270U
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- thyristor
- automatic regulation
- tap switch
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Abstract
The utility model discloses a kind of thyristor automatic Regulation tap switches, including distribution transformer low-pressure side, isolated buck transformer, distribution transformer low-pressure side output end to be connect with isolated buck transformer, it is characterised in that：Isolated buck transformer output end is connect with voltage zero-crossing detection circuit, data acquisition unit, power circuit, voltage zero-crossing detection circuit, data acquisition unit, power circuit output end and single chip machine controlling circuit connect, single chip machine controlling circuit output end is connect with SCR trigger circuits, and single chip machine controlling circuit input terminal connects reset circuit.The utility model utilizes the zero cross fired feature of thyristor, in voltage zero-crossing point of power grid interrupt requests are sent out to microcontroller, then microcontroller sends out trigger signal to thyristor gating circuit again, tap switch is completed effectively to be connected, achieve the purpose that stable distribution transformer output voltage, its can frequent operation, cost is relatively low, pressure voltage is high, good reliability, efficiently solve the deficiencies in the prior art.
Description
Technical field
The utility model is related to technical field of electric power more particularly to a kind of thyristor automatic Regulation tap switches.
Background technology
It is combined using mechanical contact and thyristor currently, the domestic novel no arc load ratio bridging switch developed is most of
It uses, makes contact in no arcuation state in switching moment thyristor input, then switch mechanical contact, the brilliant lock after switching
Pipe exits, but the voltage level born with thyristor is high, on the pipe at both ends plus voltage up to entire coil voltage,
And all pipes are normally at pressurized state, influence functional reliability.And the pipe be connected has electric current to pass through for a long time, there is pipe
Pressure drop is lost, and needs to match cooling system.Although the prior art realizes the on-load voltage regulation of no arc, no big portion of arc load ratio bridging switch
Divide and be used in combination using mechanical contact and thyristor, finishes backed off after random when thyristor switches, but this device still uses
Mechanical circulation, so there is also certain drawbacks.
Utility model content
In view of the drawbacks described above of the prior art, the technical problem to be solved by the utility model is to provide a kind of thyristors
Automatic Regulation tap switch, so as to solve the deficiencies in the prior art.
To achieve the above object, the utility model provides a kind of thyristor automatic Regulation tap switch, including distribution becomes
Depressor low-pressure side, isolated buck transformer, the distribution transformer low-pressure side output end are connect with isolated buck transformer, special
Sign is：The isolated buck transformer output end is connect with voltage zero-crossing detection circuit, data acquisition unit, power circuit,
The voltage zero-crossing detection circuit, data acquisition unit, power circuit output end and single chip machine controlling circuit connect, the monolithic
Machine control circuit output end is connect with SCR trigger circuits, and the single chip machine controlling circuit input terminal connects reset circuit.
A kind of above-mentioned thyristor automatic Regulation tap switch, the voltage zero-crossing detection circuit include optocoupler 4N25 and with
The NAND gate 74LS00 of optocoupler 4N25 output ends connection.
A kind of above-mentioned thyristor automatic Regulation tap switch, the data acquisition unit are based on A/D converter
The data acquisition circuit of TLC2543.
A kind of above-mentioned thyristor automatic Regulation tap switch, the power circuit are 5V DC power supply circuits.
A kind of above-mentioned thyristor automatic Regulation tap switch, the single chip machine controlling circuit are based on AT89C51 monolithics
The circuit of machine.
A kind of above-mentioned thyristor automatic Regulation tap switch, the SCR trigger circuits include NOT gate ULN2003,
MOC3061 chips, the NOT gate ULN2003 output ends are connect with MOC3061 chip input terminals, 4 feet of the MOC3061 chips
Output end connect resistance R1 one end, diode VD1 anodes and controllable silicon SCR 1 control terminal G, the resistance R1 other ends, two
The cathode K connection power grid positive terminals of pole pipe VD1 cathodes and controllable silicon SCR 1, the 6 foot output ends connection of the MOC3061 chips
The one end resistance RG, the one end resistance RG other ends connection resistance R2, diode VD2 anodes and controllable silicon SCR 2 control terminal G,
The resistance R2 other ends, diode VD2 cathodes connect power grid negative pole end, the controllable silicon SCR 1 with the cathode of controllable silicon SCR 2
The anode of anode and controllable silicon SCR 2 be separately connected power grid negative pole end, power grid positive terminal.
The utility model has the beneficial effects that：
The utility model utilizes the zero cross fired feature of thyristor, and interruption is sent out to microcontroller in voltage zero-crossing point of power grid
Then request sends out trigger signal to thyristor gating circuit again, complete tap switch and be effectively connected.Data acquisition unit will be adopted
The secondary side voltage signal that collection comes is sent into microcontroller, compared with the voltage reference value of system setting, such as changes beyond voltage security
Range sends trigger signal to thyristor gating circuit if then detecting network voltage zero passage by voltage zero-crossing detection circuit,
To control the working condition of thyristor, the automatic conversion of tap is completed, reaches the mesh of stable distribution transformer output voltage
, can frequent operation, cost is relatively low, pressure voltage is high, good reliability, efficiently solve the deficiencies in the prior art.
The technique effect of the design of the utility model, concrete structure and generation is made furtherly below with reference to attached drawing
It is bright, to be fully understood from the purpose of this utility model, feature and effect.
Description of the drawings
Fig. 1 is the overall structure block diagram of the utility model.
Fig. 2 is the voltage zero-crossing detection circuit schematic diagram of the utility model.
Fig. 3 is the data acquisition unit circuit diagram of the utility model.
Fig. 4 is the thyristor zero-cross triggering circuit schematic diagram of the utility model.
Specific implementation mode
As shown in Figure 1, a kind of thyristor automatic Regulation tap switch, including distribution transformer low-pressure side 1, isolated buck become
Depressor 2,1 output end of distribution transformer low-pressure side are connect with isolated buck transformer 2, it is characterised in that：The isolation drop
2 output end of pressure transformer is connect with voltage zero-crossing detection circuit 3, data acquisition unit 4, power circuit 5, the voltage zero-cross inspection
Slowdown monitoring circuit 3, data acquisition unit 4,5 output end of power circuit are connect with single chip machine controlling circuit 6, the single chip machine controlling circuit
6 output ends are connect with SCR trigger circuits 8, and 6 input terminal of the single chip machine controlling circuit connects reset circuit 7.
As shown in Fig. 2, in the present embodiment, the voltage zero-crossing detection circuit 3 includes optocoupler 4N25 and defeated with optocoupler 4N25
The NAND gate 74LS00 of outlet connection.Alternating current is applied directly to by R3 on the light emitting diode of two reverse parallel connections, is being exchanged
The positive-negative half-cycle of voltage sine wave, when amplitude reaches 1.8V or more, diode wheel conductance is logical, and to make optocoupler, also saturation is led in turn
Logical and cut-off, when optocoupler conducting or one of conducting, the output signal of NAND gate 74LS00 is high level；Work as optocoupler
When cut-off, the input signal of NAND gate 74LS00 is high level, then it exports low level, and output end obtains pulse signal at this time
For the pulse signal of 10ms (corresponding 50Hz), in interrupt inquiry combination, pulse width requires to be no less than 2us, if R3 is
LED current is limited in 2.8mA or so by 10k Ω.
As shown in figure 3, in the present embodiment, the data acquisition unit 4 is that the data based on A/D converter TLC2543 are adopted
Collector.
In the present embodiment, the power circuit 5 is 5V DC power supply circuits.
In the present embodiment, the single chip machine controlling circuit 6 is the circuit based on AT89C51 microcontrollers.
As shown in figure 4, in the present embodiment, the SCR trigger circuits 8 include NOT gate ULN2003, MOC3061 chip, described
NOT gate ULN2003 output ends are connect with MOC3061 chip input terminals, the 4 foot output ends connection resistance R1 of the MOC3061 chips
The control terminal G of one end, diode VD1 anodes and controllable silicon SCR 1, the resistance R1 other ends, diode VD1 cathodes and
The cathode K connection power grid positive terminals of controllable silicon SCR 1, one end 6 foot output ends connection resistance RG of the MOC3061 chips are described
The control terminal G, the resistance R2 that the resistance RG other ends connect the one end resistance R2, diode VD2 anodes and controllable silicon SCR 2 are another
End, diode VD2 cathodes connect power grid negative pole end with the cathode of controllable silicon SCR 2, the anode of the controllable silicon SCR 1 with it is silicon-controlled
The anode of SCR2 is separately connected power grid negative pole end, power grid positive terminal.R in Fig. 4GIt rations the power supply resistance for thyristor gate, when its high sensitivity
When, threshold impedance is higher, and RG promotes anti-interference ability, and resistance R1, R2 are trigger output current limiting resistance.
The operation principle of the utility model is：In the controls, it after microcontroller is by data acquisition process, can send out tactile
The trigger circuit of thyristor is signaled to, and then controls the working condition of tap switch.But in the conversion of AC supply voltage
In the process due to the presence of surge voltage, switching device is caused to damage, in order not to as electric power netting safe running is endangered, utilize brilliant lock
The zero cross fired feature of pipe, interrupt requests are sent out in voltage zero-crossing point of power grid to microcontroller, then give IGBT group electricity again
Road sends out trigger signal, completes tap switch and is effectively connected.The secondary side voltage signal that data acquisition unit carrys out acquisition is sent into
Microcontroller such as exceeds voltage security variation range compared with the voltage reference value of system setting, then detects electricity by voltage zero-cross
If road detects network voltage zero passage, transmission trigger signal is to thyristor gating circuit, to control the working condition of thyristor,
The automatic conversion for completing tap, achievees the purpose that stable distribution transformer output voltage.
The preferred embodiment of the utility model described in detail above.It should be appreciated that the ordinary skill people of this field
Member according to the present utility model can conceive without creative work makes many modifications and variations.Therefore, all this technology necks
Technical staff passes through logic analysis, reasoning or limited reality on the basis of existing technology according to the design of the utility model in domain
Available technical solution is tested, it all should be in the protection domain being defined in the patent claims.
Claims (6)
1. a kind of thyristor automatic Regulation tap switch, including distribution transformer low-pressure side (1), isolated buck transformer (2), institute
Distribution transformer low-pressure side (1) output end is stated to connect with isolated buck transformer (2), it is characterised in that：The isolated buck becomes
Depressor (2) output end is connect with voltage zero-crossing detection circuit (3), data acquisition unit (4), power circuit (5), the voltage mistake
Zero detection circuit (3), data acquisition unit (4), power circuit (5) output end are connect with single chip machine controlling circuit (6), the list
Piece machine control circuit (6) output end is connect with SCR trigger circuits (8), and single chip machine controlling circuit (6) the input terminal connection resets
Circuit (7).
2. a kind of thyristor automatic Regulation tap switch as described in claim 1, it is characterised in that：The voltage zero-cross detection
Circuit (3) includes optocoupler 4N25 and the NAND gate 74LS00 that is connect with optocoupler 4N25 output ends.
3. a kind of thyristor automatic Regulation tap switch as described in claim 1, it is characterised in that：The data acquisition unit
(4) it is the data acquisition circuit based on A/D converter TLC2543.
4. a kind of thyristor automatic Regulation tap switch as described in claim 1, it is characterised in that：The power circuit (5)
For 5V DC power supply circuits.
5. a kind of thyristor automatic Regulation tap switch as described in claim 1, it is characterised in that：The microcontroller control electricity
Road (6) is the circuit based on AT89C51 microcontrollers.
6. a kind of thyristor automatic Regulation tap switch as described in claim 1, it is characterised in that：The SCR trigger circuits
(8) include NOT gate ULN2003, MOC3061 chip, the NOT gate ULN2003 output ends are connect with MOC3061 chip input terminals,
One end 4 foot output ends connection resistance R1 of the MOC3061 chips, the control terminal of diode VD1 anodes and controllable silicon SCR 1
G, the cathode K connection power grid positive terminals of the resistance R1 other ends, diode VD1 cathodes and controllable silicon SCR 1 are described
The 6 foot output ends connection resistance R of MOC3061 chipsGOne end, the resistance RGThe other end connects the one end resistance R2, diode VD2
The cathode of the control terminal G of anode and controllable silicon SCR 2, the resistance R2 other ends, diode VD2 cathodes and controllable silicon SCR 2 connect
Get access to grid negative pole end, and the anode of the controllable silicon SCR 1 is being separately connected power grid negative pole end, power grid just with the anode of controllable silicon SCR 2
Extremely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721839090.9U CN207833270U (en) | 2017-12-21 | 2017-12-21 | A kind of thyristor automatic Regulation tap switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721839090.9U CN207833270U (en) | 2017-12-21 | 2017-12-21 | A kind of thyristor automatic Regulation tap switch |
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| Publication Number | Publication Date |
|---|---|
| CN207833270U true CN207833270U (en) | 2018-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721839090.9U Active CN207833270U (en) | 2017-12-21 | 2017-12-21 | A kind of thyristor automatic Regulation tap switch |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111899999A (en) * | 2020-06-29 | 2020-11-06 | 南方电网科学研究院有限责任公司 | Power electronic tap changer and distribution transformer |
| CN111969611A (en) * | 2020-08-07 | 2020-11-20 | 合肥众甫工业技术有限公司 | Transformer on-load automatic voltage regulation driving and controlling system |
-
2017
- 2017-12-21 CN CN201721839090.9U patent/CN207833270U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111899999A (en) * | 2020-06-29 | 2020-11-06 | 南方电网科学研究院有限责任公司 | Power electronic tap changer and distribution transformer |
| CN111969611A (en) * | 2020-08-07 | 2020-11-20 | 合肥众甫工业技术有限公司 | Transformer on-load automatic voltage regulation driving and controlling system |
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