CN207117151U - A kind of miniature circuit breaker reclosing controller in low pressure distributed photovoltaic power - Google Patents
A kind of miniature circuit breaker reclosing controller in low pressure distributed photovoltaic power Download PDFInfo
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- CN207117151U CN207117151U CN201720827340.0U CN201720827340U CN207117151U CN 207117151 U CN207117151 U CN 207117151U CN 201720827340 U CN201720827340 U CN 201720827340U CN 207117151 U CN207117151 U CN 207117151U
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Abstract
The utility model is the miniature circuit breaker reclosing controller in a kind of low pressure distributed photovoltaic power.The controller includes switching power circuit, 5V linear voltage-stabilizing circuits, killer switch position detecting circuit, voltage detection circuit, motor-drive circuit and microprocessor；Wherein, 5V linear voltage-stabilizing circuits, killer switch position detecting circuit, voltage detection circuit, motor-drive circuit are connected with microprocessor respectively, and switching power circuit, 5V linear voltage-stabilizing circuits, killer switch position detecting circuit are sequentially connected；Switching power circuit is also joined directly together with motor-drive circuit.The utility model saves manual closing operation operation；During supply voltage failure, breaker is in open position, and closing by hand is not supported in this position, it is ensured that the safety of user and grid maintenance personnel.
Description
Technical field
It the utility model is related to the miniature circuit breaker reclosing controller in a kind of low pressure distributed photovoltaic power and control
Method, belong to photo-voltaic power supply breaker technical field.
Background technology
After distributed power source access distribution system, clean energy resource can must be effectively utilized, reduces equipment for power transmission and distribution construction
Input, from the point of view of Chinese distributed power source total scale, distributed photovoltaic scale of the project is maximum.But distributed photovoltaic power is improving
While clean energy resource utilization rate, a series of problems is brought to power system and relevant user, gently then causes voltage to flash, it is heavy then
Visual plant failure or partial electric grid upheaval may be made, or even jeopardize personal safety.Generated electricity by way of merging two or more grid systems in 10kV voltage grades
Distributed power source, because voltage distribution net network structure is relatively clear, equipment control is fairly proper, therefore is easily controlled.But
The distributed photovoltaic power of 220V/380V low-pressure grid-connections, because low-voltage network automaticity is low, large number quipments property right category
In user, equipment amount is big, and distribution is wide, and user lacks electricity consumption experience, and its potential safety hazard protrusion on technique device, it is necessary to have
Broken through.
Current most of low pressure distributed photovoltaic power definite purpose circuit breakers drop to certain using device for under-voltage releasing equipment in line voltage
During one value, wink moves or the deenergization after certain delay.The potential winding of device for under-voltage releasing equipment is connected to power end, works as line electricity
Pressure reaches under-voltage because the suction of potential winding is directly proportional to putting on the voltage squared of coil when requiring, after voltage reduces,
The electromagnetic attraction of device for under-voltage releasing equipment reduces, and when suction is less than reactive spring force, iron core, which is inhaled, does not live armature, and armature is opened, most
The contact on electrical apparatus release hits the draw bar of low-voltage circuit breaker mechanism afterwards, makes breaker open operation.Because traditional low pressure is distributed
Photo-voltaic power supply definite purpose circuit breaker fully relies on mechanical structure in breaker and acted to detect voltage change, and reliability is low, prolongs
When time adjustability it is low, and voltage recover it is normal when, breaker is unable to automatic reclosing, reduces photovoltaic efficiency,
It is unable to efficient application luminous energy and existing equipment.
Nowadays distribution in China formula photovoltaic scale of the project is big, is badly in need of a kind of distributed photovoltaic definite purpose circuit breaker, the breaking utensil
The standby auto-cutout when photovoltaic distributed power generation occurs over-pressed, under-voltage and when voltage is normal can automatic reclosing breaker energy
The photovoltaic efficiency of low-pressure grid-connection is greatly improved, and there is the advantages that security performance is high, easily operated.
Utility model content
The purpose of this utility model is for insufficient present in current techniques, there is provided a kind of low pressure distributed photovoltaic power
In miniature circuit breaker reclosing controller and control method.The controller passes through Switching Power Supply, motor-drive circuit, breaker
The design of circuit and system busbar voltage detecting circuit is detected in the position of the switch, realizes when system busbar electric voltage over press or under-voltage reaches
During to setting delay time, controller control breaker open operation, it is ensured that controller will not be disconnected because of instantaneous voltage pulsation control
Road device separating brake, supports parallel network power generation to greatest extent, user is obtained optimum efficiency；System busbar normally reaches setting delay
During the time, controller control breaker is closed a floodgate, and saves manual closing operation operation；System busbar electric voltage over press or it is under-voltage when, break
Road device is in open position, and closing by hand is not supported in this position, it is ensured that the safety of user and grid maintenance personnel.
The technical solution of the utility model is：
A kind of miniature circuit breaker reclosing controller in low pressure distributed photovoltaic power, the controller include Switching Power Supply
Circuit, 5V linear voltage-stabilizing circuits, killer switch position detecting circuit, system busbar voltage detecting circuit, motor-drive circuit
And microprocessor；Wherein, 5V linear voltage-stabilizing circuits, killer switch position detecting circuit, system busbar voltage detecting circuit, electricity
Drive circuit is connected with microprocessor respectively, switching power circuit, 5V linear voltage-stabilizing circuits, killer switch position detection electricity
Road is sequentially connected；Switching power circuit is also joined directly together with motor-drive circuit.
The composition of described switching power circuit and its connection include the first diode D1, the second diode D2, the three or two
Pole pipe D3, the 4th diode D4 form rectifier bridge；Live wire L is concatenated into the pin of rectifier bridge first, zero line N by fuse FUSE
It is connected to rectifier bridge second pin；Zero line N is also connected by piezo-resistance RV1 with the pin of rectifier bridge first；First electric capacity C1 is simultaneously
It is associated on the three, the 4th pins of electric current bridge；The 4th pin ground connection of rectifier bridge；3rd pin of rectifier bridge also with the five or two pole
Pipe D5 anode is connected, and the 5th diode D5 negative electrode is connected with the 6th diode D6 negative electrode；6th diode D6 anode
It is connected with switching power source chip U1 D pins；3rd pin of rectifier bridge is also connected with transformer L1 the first pin, transformer
L1 second pin is connected with switching power source chip U1 D pins, transformer L1 the 4th pin ground connection, and the of transformer L1
Anode of three pins respectively with first resistor R1, the 7th diode D7 is connected, the first resistor R1 other end and the 3rd electric capacity C3
It is connected, the 3rd electric capacity C3 other end and the 7th diode D7 negative electrode are connected, as 7V voltage output ends；Switching power source chip
U1 EN pins are connected with photoelectrical coupler U2 the first pin, photoelectrical coupler U2 second pin ground connection, photoelectrical coupler
U2 the 4th pin is connected with 7V voltage output ends, photoelectrical coupler U2 the 3rd pin ground connection；Switching power source chip U1 BP
It is grounded after the second electric capacity of pin serial connection C2, switching power source chip U1 S pins ground connection；7V voltage output ends are also connected the 4th electric capacity
It is grounded after C4；
Described microprocessor is single-chip microcomputer, specifically model STC15W404AS.
Compared with prior art, the utility model has advantages below:
Automation：The utility model replaces conventional low distributed photovoltaic power breaker, using based on microprocessor
Controller controls breaker.Can distributed photovoltaic power generation system busbar it is over-pressed or under-voltage reach stipulated time time control
Breaker processed carries out separating brake；Breaker closing is controlled when voltage normally reaches the stipulated time.With automatic capability, work as photovoltaic
Power grid point it is remote, traffic is undeveloped etc. it is regional when, save manual closing operation operation, use manpower and material resources sparingly.
High reliability：The utility model replaces conventional low distributed photovoltaic power breaker, is no longer rely on mechanical part
Voltage change is detected to be acted, the controller based on microprocessor can precisely detect voltage change, can be reached in overvoltage/undervoltage
Breaker is controlled to carry out separating brake to during the stipulated time；Breaker is controlled to be closed a floodgate when voltage normally reaches the stipulated time.And
Delay time can be modified by software section, have higher reliability, effectively protect electric equipment and personal safety.
Brief description of the drawings
Fig. 1 is controller system block diagram, wherein, 1- switching power circuits；2-5V mu balanced circuits；3- killer switches position
Detect circuit；4- system busbar voltage detecting circuits；5- motor-drive circuits；6- microprocessors.
Fig. 2 is switching power circuit figure.
Fig. 3 is 5V linear voltage-stabilizing circuit figures.
Fig. 4 is motor-drive circuit figure.
Fig. 5 is the circuit diagram of Hall sensor in killer switch position detecting circuit.
Fig. 6 is system busbar voltage detecting circuit.
Fig. 7 is microcontroller circuit figure.
Fig. 8 is the flow chart of overall operation program of the present utility model.
Embodiment
Describe the utility model in detail in conjunction with the embodiments below with reference to the accompanying drawings.
As shown in figure 1, the composition of controller of the present utility model include switching power circuit 1,5V linear voltage-stabilizing circuits 2,
Killer switch position detecting circuit 3, system busbar voltage detecting circuit 4, motor-drive circuit 5 and microprocessor 6；Wherein,
5V linear voltage-stabilizing circuits 2, killer switch position detecting circuit 3, system busbar voltage detecting circuit 4, motor-drive circuit 5
Be connected respectively with microprocessor 6, switching power circuit 1,5V linear voltage-stabilizing circuits 2, killer switch position detecting circuit 3 according to
It is secondary to be connected；Switching power circuit 1 is also joined directly together with motor-drive circuit 5；System busbar and switching power circuit 1 and system are female
Line voltage detection circuit 4 is connected.
The effect of each circuit is specially：Fig. 1 is controller system block diagram.Switching power circuit 1 is by system busbar electric signal
7V stable DCs electricity is exported after treatment, is powered for 5V linear voltage-stabilizing circuits 2 and motor-drive circuit 5；5V linear voltage stabilizations electricity
7V stable DCs electricity is exported 5V stable DCs electricity by road 2 after treatment, is killer switch position detecting circuit 3 and Wei Chu
Reason device 6 is powered；Killer switch position detecting circuit 3 outputs signals to microprocessor 6, carries out killer switch position detection；
System busbar voltage detecting circuit 4 will be input to microprocessor 6 after the processing of system busbar voltage signal, carry out system busbar voltage
Signal detection；Microprocessor 6 combines system busbar voltage signal, killer switch position signalling to motor-drive circuit 5, motor
Drive circuit 5 exports logic level signal, and controlled motor rotates, and then controls breaker actuation.
Such as Fig. 2, the composition of switching power circuit 1 includes：L, N is respectively live wire and zero line；First diode (D1), second
Diode (D2), the 3rd diode (D3), the 4th diode (D4) form rectifier bridge (wherein, the first diode (D1) and the 3rd
Diode (D3) junction is the first pin, and the second diode (D2) and the 4th diode (D4) junction are second pin；The
The junction of one diode (D1) and the second diode (D2) is the 3rd pin, the 3rd diode (D3) and the 4th diode (D4)
Connection Russia basis be the 4th pin -)；Live wire L is concatenated into the pin of rectifier bridge first by fuse (FUSE), and zero line N is connected to
Rectifier bridge second pin；Zero line N is also connected by piezo-resistance RV1 with the pin of rectifier bridge first；Electric capacity C1 is connected in parallel on electric current bridge
The three, the 4th pins on；The 4th pin ground connection of rectifier bridge；Sun of 3rd pin of rectifier bridge also with the 5th diode (D5)
Extremely it is connected, the negative electrode of the 5th diode (D5) is connected with the negative electrode of the 6th diode (D6)；The anode of 6th diode (D6) with
The D pins of switching power source chip (U1) are connected；First pin of 3rd pin of rectifier bridge also with transformer (L1) is connected, transformation
The second pin of device (L1) is connected with the D pins of switching power source chip (U1), the 4th pin ground connection of transformer (L1), transformer
(L1) anode of the 3rd pin respectively with first resistor (R1), the 7th diode (D7) is connected, first resistor (R1) it is another
End is connected with the 3rd electric capacity (C3), and the other end of the 3rd electric capacity (C3) and the negative electrode of the 7th diode (D7) are connected, as 7V electricity
Output end is pressed, is connected with 5V linear voltage-stabilizing circuits 2；The EN pins of switching power source chip (U1) and the first of photoelectrical coupler (U2)
Pin is connected, the second pin ground connection of photoelectrical coupler (U2), the 4th pin and the 7V voltage output ends of photoelectrical coupler (U2)
It is connected, the 3rd pin ground connection of photoelectrical coupler (U2)；After the electric capacity of BP pin serial connections second (C2) of switching power source chip (U1)
Ground connection, the S pins ground connection of switching power source chip (U1)；7V voltage output ends the 4th electric capacity (C4) of also connecting is grounded afterwards；System electricity
Direct current can be changed into by leading portion protection circuit (FUSE, RV1) and rectifier bridge (D1-D4) rectification, then dropped by transformer (L1)
Pressure, the output electric signal of transformer (L1) feed back to electricity by current rectifying and wave filtering circuit (R1, C3, D7) and photoelectrical coupler (U2)
Source switch chip (U1), and then switch control is carried out to transformer (L1), the 7V that switching power circuit output end is stablized is low
Press direct current.
Such as Fig. 3,5V linear voltage-stabilizing circuits 2 are made up of linear regulator chip (U3) and periphery component (C5, C6, C7), the
The OUT pins of five electric capacity (C5) one end connection linear regulator chip (U3), one end ground connection；The connection of 6th electric capacity (C6) one end is linear
The EN pins of voltage stabilizing chip (C6), one end ground connection.The BYP pins of 7th electric capacity (C7) one end connection linear regulator chip (U3),
One end is grounded；
Such as Fig. 4, motor-drive circuit 5 is by motor drive ic (U4), voltage-stabiliser tube (TVS), motor (M) and periphery component
(R2, R3) is formed.Second resistance (R2) one end is connected with the FIN pins of motor drive ic (U4), one end connection microprocessor
(U6)；3rd resistor (R3) one end is connected with the RIN pins of machine driving chip (U4), and one end is connected with microprocessor (U6)；Surely
With motor (M) and connecing, one end is connected pressure diode (TVS) with the OUT1 pins of motor drive ic (U4), one end and motor drive
The OUT2 pins connection of dynamic chip (U4).Motor drive ic is powered by 7V, when FIN is high level, RIN is low level, motor
Rotate forward；When FIN is low level, RIN is high level, motor reversal；When pin is all low, motor does not rotate.
Such as Fig. 5, killer switch position detecting circuit 3 is known circuits, by three Hall sensors (U5) and periphery electricity
Road forms.The composition of each Hall sensor component and its peripheral circuit (R4, C8, C9) is as shown in Figure 5：8th electric capacity (C8)
One end is connected with the OUT pins of Hall sensor (U5) and one end of the 4th resistance (R4), one end ground connection；9th electric capacity (C9)
One end is connected with the VCC pin of Hall sensor (U5) and one end of the 4th resistance；Output end " OUT_5V " and microprocessor phase
Even.The gear of breaker mechanical part carries the magnet that can sense of Hall sensor, and magnet is corresponding during three kinds of states of breaker closes
Gate position, open position, (free position will not control open circuit to free position to support the position of closing by hand and separating brake
Device automatic reclosing).
Such as Fig. 6, system busbar voltage detecting circuit 4 includes the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7)
8th resistance (R8) and the tenth electric capacity (C10).The live wire of system busbar be sequentially connected the 5th resistance (R5), the 6th resistance (R6),
7th resistance (R7), the 8th resistance (R8), the 8th resistance (R8) one end ground connection, the AD collection pins of described microprocessor (U6)
It is connected between the 7th resistance (R7) and the 8th resistance (R8).Tenth electric capacity (C10) one terminates the 7th resistance (R7) and the 8th electricity
Hinder among (R8), one end ground connection, strobe.
Such as Fig. 7, microprocessor (U6) and modules connection figure, P1.0, P1.1, P1.2 pin and three Hall sensors
Output connection；P1.3 pins are connected with the V_test of system busbar voltage detecting circuit 4；VCC pin and 5V linear voltage-stabilizing circuits 2
OUT_5V connections；GND pin is connected with the 11st electric capacity (C11) and ground；P1.6 and motor-drive circuit 5 MOTOR_FIN
Connection；P1.7 is connected with the MOTOR_RIN of motor-drive circuit 5；11st electric capacity (C11) one end and microprocessor (U6)
VCC pin connects, one end ground connection.
Described microprocessor is single-chip microcomputer, specifically model STC15W404AS.
Such as Fig. 8, illustrate how controller realizes breaker control with reference to the flow chart of the overall operation program of controller.
1) first microprocessor is initialized, sets over-pressed, under-voltage delay opening time in the microprocessor, during delay
Between be set as 1.8s；The setting setting normal reclosing delay time of voltage, delay time are set as 3.6s in the microprocessor；This
The purpose for locating over-pressed, under-voltage separating brake delay is when preventing photovoltaic generation, to prevent illumination or equipment variations from causing instantaneous voltage not
Normally cause breaker open operation, only breaker just can separating brake when voltage is abnormal reaches setting separating brake delay time；Similarly,
When voltage recovers normally to reach combined floodgate delay time, breaker is closed a floodgate, and improves generating efficiency, protection equipment safety.
2) microprocessor judges：System busbar electric signal is input to micro- place after being handled by system busbar voltage detecting circuit
Manage device, microprocessor judge system busbar whether mistake/under-voltage
If cross/under-voltage：Microprocessor judged/under-voltage whether reach 1.8sThe microprocessor if not up to 1.8s
Corresponding signal is exported to motor-drive circuit, controlled motor is failure to actuate；If reaching 1.8s, microprocessor passes through killer switch
Position detecting circuit judges whether breaker is in closing position：Microprocessor drives to motor if closing position is not in
Circuit output corresponding signal, controlled motor are failure to actuate；Microprocessor exports to motor-drive circuit if in closing position
Corresponding signal, controlled motor action, separating brake is carried out to breaker.
If without overvoltage/undervoltage：Microprocessor judges whether voltage normally reaches 3.6sMicro- place if not up to 3.6s
Manage device and export corresponding signal to motor-drive circuit, controlled motor is failure to actuate；If reaching 3.6s, microprocessor passes through breaker
Whether position of the switch detection circuit judges breaker is in closing position：Microprocessor drives to motor if in closing position
Dynamic circuit output corresponding signal, controlled motor are failure to actuate；Microprocessor is to motor-drive circuit if closing position is not in
Corresponding signal is exported, controlled motor action, breaker is closed a floodgate.
3) after the completion of above-mentioned judgement, microprocessor continue to judge system busbar whether mistake/under-voltage, circulation step 1) 2), it is real
Existing control of the controller to breaker.
The utility model unaccomplished matter is known technology.
Claims (2)
- A kind of 1. miniature circuit breaker reclosing controller in low pressure distributed photovoltaic power, it is characterized in that the controller includes opening Powered-down source circuit, 5V linear voltage-stabilizing circuits, killer switch position detecting circuit, system busbar voltage detecting circuit, motor drive Dynamic circuit and microprocessor；Wherein, 5V linear voltage-stabilizing circuits, killer switch position detecting circuit, system busbar voltage detecting Circuit, motor-drive circuit are connected with microprocessor respectively, switching power circuit, 5V linear voltage-stabilizing circuits, killer switch position Detection circuit is put to be sequentially connected；Switching power circuit is also joined directly together with motor-drive circuit.
- 2. the miniature circuit breaker reclosing controller in low pressure distributed photovoltaic power as claimed in claim 1, it is characterized in that The composition of described switching power circuit includes the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4 forms rectifier bridge；Live wire L is concatenated into the pin of rectifier bridge first by fuse FUSE, and zero line N is connected to rectifier bridge second and drawn Pin；Zero line N is also connected by piezo-resistance RV1 with the pin of rectifier bridge first；First electric capacity C1 is connected in parallel on the 3rd of electric current bridge the, On four pins；The 4th pin ground connection of rectifier bridge；Anode of 3rd pin of rectifier bridge also with the 5th diode D5 is connected, and the 5th Diode D5 negative electrode is connected with the 6th diode D6 negative electrode；6th diode D6 anode and switching power source chip U1 D Pin is connected；3rd pin of rectifier bridge is also connected with transformer L1 the first pin, transformer L1 second pin and switch Power supply chip U1 D pins are connected, transformer L1 the 4th pin ground connection, transformer L1 the 3rd pin respectively with first resistor R1, the 7th diode D7 anode are connected, and the first resistor R1 other end and the 3rd electric capacity C3 are connected, and the 3rd electric capacity C3's is another End is connected with the 7th diode D7 negative electrode, as 7V voltage output ends；Switching power source chip U1 EN pins and photoelectric coupling Device U2 the first pin is connected, photoelectrical coupler U2 second pin ground connection, photoelectrical coupler U2 the 4th pin and 7V voltages Output end is connected, photoelectrical coupler U2 the 3rd pin ground connection；After switching power source chip U1 the second electric capacity of BP pin serial connections C2 Ground connection, switching power source chip U1 S pins ground connection；7V voltage output ends are also connected and are grounded after the 4th electric capacity C4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720827340.0U CN207117151U (en) | 2017-07-10 | 2017-07-10 | A kind of miniature circuit breaker reclosing controller in low pressure distributed photovoltaic power |
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| CN201720827340.0U CN207117151U (en) | 2017-07-10 | 2017-07-10 | A kind of miniature circuit breaker reclosing controller in low pressure distributed photovoltaic power |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107204603A (en) * | 2017-07-10 | 2017-09-26 | 河北工业大学 | Miniature circuit breaker reclosing controller and control method in a kind of low pressure distributed photovoltaic power |
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- 2017-07-10 CN CN201720827340.0U patent/CN207117151U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107204603A (en) * | 2017-07-10 | 2017-09-26 | 河北工业大学 | Miniature circuit breaker reclosing controller and control method in a kind of low pressure distributed photovoltaic power |
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