CN209356565U - The current collection circuit of photovoltaic system monitoring module - Google Patents
The current collection circuit of photovoltaic system monitoring module Download PDFInfo
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- CN209356565U CN209356565U CN201822047879.1U CN201822047879U CN209356565U CN 209356565 U CN209356565 U CN 209356565U CN 201822047879 U CN201822047879 U CN 201822047879U CN 209356565 U CN209356565 U CN 209356565U
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- operational amplifier
- monitoring module
- amplifier
- system monitoring
- photovoltaic system
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Abstract
The utility model relates to photovoltaic technology field, and in particular to a kind of current collection circuit of photovoltaic system monitoring module.The current collection circuit of the photovoltaic system monitoring module includes amplifier unit and opto-coupled feedback unit；The output end of the amplifier unit connects opto-coupled feedback unit, draws signal acquisition terminal on the opto-coupled feedback unit；The amplifier unit includes receiving end, the first power supply Bat1, operational amplifier OP1, first resistor R1 and second resistance R2；The receiving end is used to connect the output end of solar energy electroplax component, the anode of the first power supply Bat1, one end of first resistor R1, one end of second resistance R2 and operational amplifier OP1 positive feeder ear be all connected with receiving end；The normal phase input end of the other end connection operational amplifier OP1 of first resistor R1, the other end of second resistance R2 connects the inverting input terminal of the operational amplifier OP1, and the cathode of the cathode feeder ear of the operational amplifier OP1 and the first power supply Bat1 connect the inverting input terminal of the operational amplifier OP1.
Description
Technical field
The utility model relates to photovoltaic technology field, and in particular to a kind of current acquisition electricity of photovoltaic system monitoring module
Road.
Background technique
Need the voltage that acquires very high solar energy electroplax component in photovoltaic system monitoring, this is just according at acquisition electric current
It is difficult.Currently existing scheme solar energy electroplax component voltage working range 600V-1000v, currently existing scheme are using current Hall
Sensor carries out high side current measurement, but due to the amplifier without so high common-mode voltage, so needing mostly first input
Signal decaying, then uses differential amplification, so that the total temperature range of acquisition is all highly difficult to 1% precision.
Summary of the invention
In order to solve the deficiencies in the prior art, the utility model provides a kind of electric current of photovoltaic system monitoring module
Acquisition Circuit.
According to technical solution provided by the utility model, a kind of current collection circuit of photovoltaic system monitoring module is described
The current collection circuit of photovoltaic system monitoring module includes amplifier unit and opto-coupled feedback unit；The output end of the amplifier unit
Opto-coupled feedback unit is connected, draws signal acquisition terminal on the opto-coupled feedback unit；
The amplifier unit includes receiving end, the first power supply Bat1, operational amplifier OP1, the electricity of first resistor R1 and second
Hinder R2；The receiving end is used to connect the output end of solar energy electroplax component, the anode of the first power supply Bat1, first resistor
The positive feeder ear of one end of R1, one end of second resistance R2 and operational amplifier OP1 is all connected with receiving end；First resistor R1's
The other end connects the normal phase input end of operational amplifier OP1, and the other end of second resistance R2 connects the operational amplifier OP1's
The cathode of inverting input terminal, the cathode feeder ear of the operational amplifier OP1 and the first power supply Bat1 connect the operation amplifier
The inverting input terminal of device OP1；
The opto-coupled feedback unit includes optocoupler, and the optocoupler includes optocoupler primary side and optical coupling secondary edges；The operation amplifier
The reverse phase of one end of the output end connection optocoupler primary side of device OP1, the other end connection operational amplifier OP1 of the optocoupler primary side is defeated
Enter end.
Further, the output end of the amplifier unit is the inverting input terminal of the operational amplifier OP1.
Further, the optocoupler primary side is Light-emitting diode LED 1, and one end of the optocoupler primary side is described luminous two
The anode of pole pipe LED1, the other end of optocoupler primary side are the cathode of the Light-emitting diode LED 1.
Further, the opto-coupled feedback unit further includes second source Bat2, NMOS tube T1 and 3rd resistor R3；It is described
The grid of the anode connection NMOS tube T1 of second source Bat2, the drain electrode of the NMOS tube T1 connect the output of the amplifier unit
End, the first end of the source electrode connection optical coupling secondary edges of the NMOS tube T1, the second end of the optical coupling secondary edges connect 3rd resistor R3
One end, the 3rd resistor R3 the other end connection second source Bat2 cathode.
Further, the optical coupling secondary edges are triode T2, and the triode T2 is N-type triode；The optical coupling secondary edges
First end be the triode T2 collector, the second ends of the optical coupling secondary edges is the emitter of the triode T2, institute
The third end for stating optical coupling secondary edges is the base stage of the triode T2.
Further, signal acquisition terminal is drawn on one end that the 3rd resistor R3 is connected with optical coupling secondary edges.
Further, the other end of the first resistor R1 is also connected with photovoltaic DC-to-AC converter.
Further, the signal acquisition terminal connects analog-digital commutator.
The current collection circuit that can be seen that photovoltaic system monitoring module provided by the utility model from the above, with
The prior art, which is compared, has following advantages:
First, and the utility model is defeated by the reverse phase of the cathode feeder ear connection operational amplifier OP1 of operational amplifier OP1
Enter end, and in conjunction with the power supply of the first power supply Bat1, the utility model is able to solve operational amplifier OP1 common-mode voltage mistake
Big problem, so that operational amplifier OP1 common mode voltage reduction.
Second, the output end of the operational amplifier in the amplifier unit can control optocoupler primary side Light-emitting diode LED 1
Brightness, the brightness of the optocoupler primary side Light-emitting diode LED 1 can control the electric current and voltage of optical coupling secondary edges, to control
The on-off of NMOS tube in opto-coupled feedback unit, and the size of current of control entire feedback unit and signal acquisition terminal.
Detailed description of the invention
Fig. 1 is the electrical block diagram of the utility model.
1. amplifier unit, 2. opto-coupled feedback units, 3. signal acquisition terminals, 4. receiving ends, 5. solar-electricity board groups
Part, 6. optocoupler primary sides, 7. optical coupling secondary edges, 8. photovoltaic DC-to-AC converters, 9. analog-digital commutators.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, below in conjunction with specific embodiment, and
Referring to attached drawing, the utility model is further described.Wherein identical components are presented with like reference characters.It needs
Illustrate, word "front", "rear" used in the following description, "left", "right", "up" and "down" refer to the side in attached drawing
To.The word "inner" used and "outside" refer respectively to the direction towards or away from geometric center of specific component.
The utility model provides a kind of current collection circuit of photovoltaic system monitoring module, as shown in Figure 1, the photovoltaic system
The current collection circuit of system monitoring module includes: amplifier unit 1 and opto-coupled feedback unit 2；
The output end of the input terminal connection solar energy electroplax component 5 of the amplifier unit 1, the output of the amplifier unit 1
End connects opto-coupled feedback unit 2, and signal acquisition terminal 3 is drawn on the opto-coupled feedback unit 2, and the signal acquisition terminal 3 connects mould
Analog-to-digital conversion apparatus 9.The amplifier unit 1 is used to acquire the electric current and voltage signal of solar energy electroplax component 5, and by the electric current
With voltage signal by amplifier and feedback output to opto-coupled feedback unit 2, the opto-coupled feedback unit 2 is defeated according to amplifier unit 1
Signal out changes the output electric current of its signal acquisition terminal 3, and the current collection circuit of photovoltaic system monitoring module is not by solar energy
The curent change status information of solar energy electroplax component 5 can be acquired while the influence of the high voltage of battery plate component 5.
The amplifier unit 1 includes receiving end 4, the first power supply Bat1, operational amplifier OP1, first resistor R1 and second
Resistance R2；The receiving end 4 connects the output end of solar energy electroplax component 5, and the receiving end 4 is the input terminal of amplifier unit 1,
The output end of the amplifier unit 1 is the inverting input terminal of the operational amplifier OP1.The first power supply Bat1 is 12V
Power supply, the anode connection receiving end 4 of the first power supply Bat1, the receiving end 4 is also connected with one end of first resistor R1, second resistance
One end of R2 and the positive feeder ear of operational amplifier OP1；The positive of the other end connection operational amplifier OP1 of first resistor R1
The other end of input terminal and first resistor R1 export electric current to photovoltaic DC-to-AC converter 8；The other end of the second resistance R2 connects
The inverting input terminal of the operational amplifier OP1；The anode of the output end connection optocoupler primary side 6 of the operational amplifier OP1；Institute
The cathode feeder ear for stating operational amplifier OP1 connects the inverting input terminal of the operational amplifier OP1, the operational amplifier
The inverting input terminal of OP1 is also connected with the cathode of the first power supply Bat1 and the cathode of the optocoupler primary side 6；The amplifier unit
1 output end is the inverting input terminal of the operational amplifier OP1.
The opto-coupled feedback unit 2 includes: optocoupler, second source Bat2, optical coupling secondary edges 7, NMOS tube T1 and 3rd resistor
R3；
The optocoupler includes optocoupler primary side 6 and optical coupling secondary edges 7；The optocoupler primary side 6 is Light-emitting diode LED 1, optocoupler
Secondary side is triode T2.The second source Bat2 is 12V power supply, the anode connection NMOS tube T1's of the second source Bat2
Grid, the drain electrode of the NMOS tube T1 connect the output end of the amplifier unit 1, and the source electrode of the NMOS tube T1 connects optocoupler pair
The collector on side 7, one end of the emitter connection 3rd resistor R3 of the optical coupling secondary edges 7, the other end of the 3rd resistor R3
Connect the cathode of second source Bat2.The signal acquisition terminal 3 is drawn on the emitter of the optical coupling secondary edges 7.
Illustrate the beneficial effects of the utility model, working principle and the course of work in conjunction with specific embodiment are as follows:
First, since 5 voltage power supply of solar energy electroplax component is all higher, in the range of 600V-1000V, in the prior art
The current acquisition module of solar energy electroplax component 5 all there is a problem of that common-mode voltage is excessively high, once operational amplifier OP1's is total to
Mode voltage is excessively high, not only will affect operational amplifier OP1 amplification coefficient can also make the operational amplifier OP1 exist hit
The risk worn.So that the cathode feeder ear of operational amplifier OP1 is connected the anti-phase input of operational amplifier OP1 by the utility model
End, and in conjunction with the power supply of the first power supply Bat1, it is excessive that the utility model is able to solve operational amplifier OP1 common-mode voltage
The problem of, so that operational amplifier OP1 common mode voltage reduction are as follows: 0.5 × (Vp+ Vn)-Vn, the Vp are operation amplifier
The voltage of the normal phase input end of device OP1, the Vn are the voltage of the inverting input terminal of operational amplifier OP1.
Second, on the one hand to be used for the operational amplifier OP1 inner loop another for the supply current of operational amplifier OP1
On the one hand for exporting, but usually operational amplifier OP1 inner loop consuming electric current very little is negligible, therefore works as
The electric current that receiving end 4 acquires is bigger, and the positive feeder ear electric current for flowing into the operational amplifier OP1 is also bigger, therefore flows into
The electric current of optocoupler primary side 6 is bigger, and the brightness of 6 Light-emitting diode LED 1 of optocoupler primary side is stronger, when Light-emitting diode LED 1
Brightness is stronger, and 7 conduction of optical coupling secondary edges is better, and 7 collector current of optical coupling secondary edges is bigger, so as to control the leakage of NMOS tube T1
Electrode current, so that the current following receiving end 4 in signal acquisition terminal 3 acquires the variation of electric current and voltage and changes, and
The signal acquisition terminal 3 connects analog-digital commutator 9.
It should be understood by those ordinary skilled in the art that: the foregoing is merely specific embodiment of the utility model and
, it is not intended to limit the utility model, all any modifications within the purport of the utility model, made, change equivalent replacement
Into etc., it should be included within the scope of protection of this utility model.
Claims (8)
1. a kind of current collection circuit of photovoltaic system monitoring module, which is characterized in that the electricity of the photovoltaic system monitoring module
Flowing Acquisition Circuit includes amplifier unit (1) and opto-coupled feedback unit (2)；The output end connection optocoupler of the amplifier unit (1) is anti-
It presents unit (2), draws signal acquisition terminal (3) on the opto-coupled feedback unit (2)；
The amplifier unit (1) includes receiving end (4), the first power supply Bat1, operational amplifier OP1, first resistor R1 and second
Resistance R2；The receiving end (4) is used to connect the output ends of solar energy electroplax component (5), the anode of the first power supply Bat1,
The positive feeder ear of one end of first resistor R1, one end of second resistance R2 and operational amplifier OP1 is all connected with receiving end (4)；
The normal phase input end of the other end connection operational amplifier OP1 of first resistor R1, the other end of second resistance R2 connect the fortune
Calculate the inverting input terminal of amplifier OP1, the cathode connection of the cathode feeder ear of the operational amplifier OP1 and the first power supply Bat1
The inverting input terminal of the operational amplifier OP1；
The opto-coupled feedback unit (2) includes optocoupler, and the optocoupler includes optocoupler primary side (6) and optical coupling secondary edges (7)；The operation
The other end of one end of output end connection optocoupler primary side (6) of amplifier OP1, the optocoupler primary side (6) connects operational amplifier
The inverting input terminal of OP1.
2. the current collection circuit of photovoltaic system monitoring module as described in claim 1, which is characterized in that the amplifier unit
(1) output end is the inverting input terminal of the operational amplifier OP1.
3. the current collection circuit of photovoltaic system monitoring module as described in claim 1, which is characterized in that the optocoupler primary side
It (6) is Light-emitting diode LED 1, one end of the optocoupler primary side (6) is the anode of the Light-emitting diode LED 1, optocoupler primary side
(6) the other end is the cathode of the Light-emitting diode LED 1.
4. the current collection circuit of photovoltaic system monitoring module as described in claim 1, which is characterized in that the opto-coupled feedback
Unit (2) further includes second source Bat2, NMOS tube T1 and 3rd resistor R3；The anode connection NMOS of the second source Bat2
The grid of pipe T1, the drain electrode of the NMOS tube T1 connect the output end of the amplifier unit (1), and the source electrode of the NMOS tube T1 connects
Connect the first end of optical coupling secondary edges (7), one end of the second end connection 3rd resistor R3 of the optical coupling secondary edges (7), the third electricity
Hinder the cathode of the other end connection second source Bat2 of R3.
5. the current collection circuit of photovoltaic system monitoring module as claimed in claim 4, which is characterized in that the optical coupling secondary edges
It (7) is triode T2, the triode T2 is N-type triode；The first end of the optical coupling secondary edges (7) is the triode T2's
Collector, the second end of the optical coupling secondary edges (7) are the emitter of the triode T2, the third end of the optical coupling secondary edges (7)
For the base stage of the triode T2.
6. the current collection circuit of photovoltaic system monitoring module as claimed in claim 4, which is characterized in that the 3rd resistor
Signal acquisition terminal (3) are drawn on one end that R3 is connected with optical coupling secondary edges (7).
7. the current collection circuit of photovoltaic system monitoring module as described in claim 1, which is characterized in that the first resistor
The other end of R1 is also connected with photovoltaic DC-to-AC converter (8).
8. the current collection circuit of photovoltaic system monitoring module as described in claim 1, which is characterized in that the signal acquisition
Hold (3) connection analog-digital commutator (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822047879.1U CN209356565U (en) | 2018-12-06 | 2018-12-06 | The current collection circuit of photovoltaic system monitoring module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822047879.1U CN209356565U (en) | 2018-12-06 | 2018-12-06 | The current collection circuit of photovoltaic system monitoring module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209356565U true CN209356565U (en) | 2019-09-06 |
Family
ID=67798463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822047879.1U Active CN209356565U (en) | 2018-12-06 | 2018-12-06 | The current collection circuit of photovoltaic system monitoring module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209356565U (en) |
-
2018
- 2018-12-06 CN CN201822047879.1U patent/CN209356565U/en active Active
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