CN204423224U - A kind of solar energy system control structure based on MPPT - Google Patents
A kind of solar energy system control structure based on MPPT Download PDFInfo
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- CN204423224U CN204423224U CN201520071826.7U CN201520071826U CN204423224U CN 204423224 U CN204423224 U CN 204423224U CN 201520071826 U CN201520071826 U CN 201520071826U CN 204423224 U CN204423224 U CN 204423224U
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Abstract
A kind of solar energy system control structure based on MPPT of the utility model, it can make solar energy system controller make solar cell always work near maximum power point, to reach top efficiency in generating and thermal energy storage process, it comprises MPPT control circuit, solar array voltage sample circuit, battery tension sample circuit, charge current sample circuit, single-chip microcomputer, solar cell and accumulator are powered to described MPPT control circuit simultaneously, and described solar cell and accumulator are corresponding to described solar array voltage sample circuit respectively, battery tension sample circuit is powered, described solar array voltage sample circuit, battery tension sample circuit, charge current sample circuit is all connected signal transmission with described single-chip microcomputer, described single-chip microcomputer outputs signal to described MPPT control circuit.
Description
Technical field
The utility model relates to technical field of electronic products, and especially a kind of solar cell that can make always works in controller near maximum power point, is specially a kind of solar energy system control structure based on MPPT.
Background technology
Small-sized photovoltaic generating system be using daytime sunshine as the energy, solar cell is utilized to charge a battery, sun power is converted to chemical energy to be stored in accumulator, energy is provided as power supply to DC load using accumulator when night uses, converts chemical energy in accumulator is become luminous energy, make DC load work, wherein, solar energy system controller is from simply realizing accumulator cell charging and discharging controlling functions in early days, bring into use microprocessor, realize software programming, develop to intelligent direction; The output of solar cell is charged to accumulator by traditional solar energy system controller, and has the defencive function overcharging and cross and put, but from energy-conservation angle, is but the whole efficiency wishing to improve solar energy system.
Summary of the invention
For the problems referred to above, a kind of solar energy system control structure based on MPPT of the utility model, it can make solar energy system controller make solar cell always work near maximum power point, to reach top efficiency in generating and thermal energy storage process.
Its technical scheme is such: it is characterized in that: it comprises MPPT control circuit, solar array voltage sample circuit, battery tension sample circuit, charge current sample circuit, single-chip microcomputer, solar cell and accumulator are powered to described MPPT control circuit simultaneously, and described solar cell and accumulator are corresponding to described solar array voltage sample circuit respectively, battery tension sample circuit is powered, described solar array voltage sample circuit, battery tension sample circuit, charge current sample circuit is all connected signal transmission with described single-chip microcomputer, described single-chip microcomputer outputs signal to described MPPT control circuit.
It is further characterized in that: described single-chip microcomputer adopts model STC12C5202AD single-chip microcomputer;
Described MPPT control circuit comprises DC/DC varying circuit, switch tube driving circuit, and described DC/DC varying circuit correspondence connects described switch tube driving circuit, and described DC/DC varying circuit adopts the topological circuit of Roche voltage-dropping type;
Described switch tube driving circuit comprises driver U1, diode D1, electric capacity C1, C2, resistance R1, R2, R3, described DC/DC varying circuit comprises field effect transistor Q1, resistance R4, R5, inductance L 1, electric capacity C3, diode D2 ~ D5, described driver U1 adopts model IR2110 driver, 10 pin of described driver U1 are connected to after 11 pin of single-chip microcomputer connect described resistance R1, 3 pin of described driver U1 are connected to after 2 pin of described driver U1 connect described electric capacity C1, the 13 pin ground connection of described driver U1, 5 pin of described driver U1 connect one end of described electric capacity C2, the other end of described electric capacity C2 with connect described diode D1 between 3 pin being connected described driver U1 after be connected to 6 pin of described driver U1,9 of described driver U1, connect described resistance R4 between 11 pin, 10 pin of described single-chip microcomputer connect 11 pin of described driver U1, and 3 pin of described driver U1 connect 9 pin of described driver U1, described diode D4, the negative pole of D5,5 pin of described driver U1 connect described resistance R2, one end of R3,7 pin of described driver U1 connect the positive pole of described diode D2, the other end of resistance R3, the drain electrode of field effect transistor Q1, the other end of described resistance R2 connects the grid of described field effect transistor Q1, the source electrode of described field effect transistor Q1 connects positive pole and the solar cell positive pole S+ of described diode D4, the negative pole of described diode D2 all with one end of described inductance L 1, the negative pole of diode D3 connects, and the positive pole of described diode D3 to connect behind one end of described resistance R5 all ground connection, and the other end of described inductance L 1 connects one end of described electric capacity C3, all battery positive voltage B+ is met, described resistance R5 after the positive pole of diode D5, battery terminal negative B-is all met after the other end connection of electric capacity C3,
Described solar array voltage sample circuit comprises voltage follower U2, resistance R6, R7, described resistance R7 one end ground connection, one end of described resistance R6 connects solar cell positive pole S+, be connected to 5 pin of described voltage follower U2 after the other end of described resistance R6, R7 is connected, 6,7 pin of described voltage follower U2 are connected and connect 22 pin of single-chip microcomputer;
Described battery tension sample circuit comprises voltage follower U3, resistance R8, R9, described resistance R9 one end ground connection, one end of described resistance R8 connects battery positive voltage B+, be connected to 10 pin of described voltage follower U3 after the other end of described resistance R8, R9 is connected, 8,9 pin of described voltage follower U3 are connected and connect 18 pin of single-chip microcomputer;
Described charge current sample circuit comprises voltage amplifier U4, electric capacity C4, resistance R10 ~ R14, 14 pin of described voltage amplifier U4 are connected to after 19 pin of single-chip microcomputer connect described resistance R10, and connect one end of described resistance R11, the other end of described resistance R11 and one end of described resistance R12, 13 pin of voltage amplifier U4 are all connected, 12 pin of described voltage amplifier U4 and described resistance R13, one end of electric capacity C4 is all connected, battery terminal negative B-is connected to after the other end of described resistance R13 is connected with one end of described resistance R14, described R12, R14, the all connected rear ground connection of the other end of electric capacity C4.
The beneficial effects of the utility model are, by solar array voltage sample circuit, battery tension sample circuit, charge current sample circuit is connected signal transmission with described single-chip microcomputer, single-chip microcomputer outputs signal to MPPT control circuit, single-chip microcomputer gathers solar array voltage value respectively, battery tension value, charging current value, and calculated by MPPT mathematical model, acquired results carries out PWM to field effect transistor Q1 in the form of a pulse, thus make the output characteristics of solar cell always work near maximum power point, whole charging system is made to reach top efficiency.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is MPPT control circuit of the present utility model;
Fig. 3 is solar array voltage sample circuit of the present utility model;
Fig. 4 is battery tension sample circuit of the present utility model;
Fig. 5 is charge current sample circuit of the present utility model.
Embodiment
As Fig. 1, shown in Fig. 2, the utility model comprises MPPT control circuit 1, solar array voltage sample circuit 2, battery tension sample circuit 3, charge current sample circuit 4, single-chip microcomputer 5, solar cell S and accumulator B powers to MPPT control circuit 1 simultaneously, and solar cell S and accumulator B is corresponding to solar array voltage sample circuit 2 respectively, battery tension sample circuit 3 is powered, solar array voltage sample circuit 2, battery tension sample circuit 3, charge current sample circuit 4 is all connected signal transmission with single-chip microcomputer 5, single-chip microcomputer 5 outputs signal to MPPT control circuit 1, single-chip microcomputer 5 adopts model STC12C5202AD single-chip microcomputer, and it carries A/D translation function and PWM exports, MPPT control circuit 1 comprises DC/DC varying circuit, switch tube driving circuit, the corresponding connecting valve tube drive circuit of DC/DC varying circuit, DC/DC varying circuit adopts the topological circuit of Roche voltage-dropping type, DC/DC varying circuit comprises field effect transistor Q1, resistance R4, R5, inductance L 1, electric capacity C3, diode D2 ~ D5, then field effect transistor Q1, resistance R4, R5, inductance L 1, electric capacity C3, diode D2 ~ D5 constitute the topological circuit of Roche voltage-dropping type, switch tube driving circuit comprises driver U1, diode D1, electric capacity C1, C2, resistance R1, R2, R3, driver U1 adopts model IR2110 driver, 10 pin of driver U1 are connected to after 11 pin contact resistance R1 of single-chip microcomputer 5, 3 pin of driver U1 are connected to after the 2 pin connection electric capacity C1 of driver U1, the 13 pin ground connection of driver U1, 5 pin of driver U1 connect one end of electric capacity C2, the other end of electric capacity C2 with connect diode D1 between 3 pin being connected driver U1 after be connected to 6 pin of driver U1,9 of driver U1, contact resistance R4 between 11 pin, 10 pin of single-chip microcomputer 5 connect 11 pin of driver U1, and 3 pin of driver U1 connect 9 pin of driver U1, diode D4, the negative pole of D5, the 5 pin contact resistance R2 of driver U1, one end of R3,7 pin of driver U1 connect the positive pole of diode D2, the other end of resistance R3, the drain electrode of field effect transistor Q1, the other end of resistance R2 connects the grid of field effect transistor Q1, the negative pole that the source electrode of field effect transistor Q1 connects the positive pole of diode D4 and solar cell positive pole S+, diode D2 all with one end of inductance L 1, the negative pole of diode D3 connects, equal ground connection behind one end of the positive pole contact resistance R5 of diode D3, and the other end of inductance L 1 connects one end of electric capacity C3, all battery positive voltage B+ is met, resistance R5 after the positive pole of diode D5, battery terminal negative B-is all met after the other end connection of electric capacity C3, wherein solar cell S is the element of opto-electronic conversion, accumulator B is an energy-storage travelling wave tube, field effect transistor Q1 is an element performing PWM function, and the electric current of solar cell S flows out to the source electrode of field effect transistor Q1 from solar cell positive pole S+, through drain electrode, the diode D2 of field effect transistor Q1, again by inductance L 1, arrive battery positive voltage B+, then by battery terminal negative B-, then by resistance R5, finally get back to the negative pole of solar cell S, complete charge circuit,
As shown in Figure 3, solar array voltage sample circuit 2 comprises voltage follower U2, resistance R6, R7, resistance R7 one end ground connection, one end of resistance R6 connects solar cell positive pole S+, be connected to 5 pin of voltage follower U2 after the other end of resistance R6, R7 is connected, 6,7 pin of voltage follower U2 are connected and connect 22 pin of single-chip microcomputer 5.
As shown in Figure 4, battery tension sample circuit 3 comprises voltage follower U3, resistance R8, R9, resistance R9 one end ground connection, one end of resistance R8 connects battery positive voltage B+, be connected to 10 pin of voltage follower U3 after the other end of resistance R8, R9 is connected, 8,9 pin of voltage follower U3 are connected and connect 18 pin of single-chip microcomputer 5.
As shown in Figure 5, charge current sample circuit 4 comprises voltage amplifier U4, electric capacity C4, resistance R10 ~ R14,14 pin of voltage amplifier U4 are connected to after 19 pin contact resistance R10 of single-chip microcomputer 5, and one end of contact resistance R11, the other end of resistance R11 is all connected with 13 pin of one end of resistance R12, voltage amplifier U4,12 pin of voltage amplifier U4 are all connected with one end of resistance R13, electric capacity C4, battery terminal negative B-is connected to, ground connection after the other end of R12, R14, electric capacity C4 is all connected after the other end of resistance R13 is connected with one end of resistance R14.
In the utility model, 10 pin of 11 pin to driver U1 of single-chip microcomputer 5 export PWM and adjust bandwidth signals, the output state of 10 pin to driver U1 of single-chip microcomputer 5 controls, when 11 foots of driver U1 are low level, 7 heels of driver U1 change with the tune bandwidth signals of 10 foots of driver U1, driver U1 by its 5, 7 foots export driving pulse to field effect transistor Q1, the voltage of solar cell S is by resistance R6, R7 divides the anode being sent to voltage follower U2, the output terminal of voltage follower U2 delivers to the magnitude of voltage of solar cell S on 22 pin of single-chip microcomputer 5 to carry out A/D conversion, digital quantity after conversion, MPPT computing is carried out by single-chip microcomputer 5, the voltage of accumulator B is by the anode point being sent to voltage follower U3 of resistance R8, R9, by the output terminal of voltage follower U3, the magnitude of voltage of accumulator B is delivered to 18 pin of single-chip microcomputer to carry out A/D conversion, digital quantity after conversion, carries out MPPT computing by single-chip microcomputer 5, the voltage drop value that charging current produces on resistance R14, the anode of voltage amplifier U4 is delivered to through resistance R13, the enlargement factor of voltage amplifier U4 is determined by the ratio of R11 and R12, voltage signal after amplification delivers to 19 pin of single-chip microcomputer 5 by the output terminal of voltage amplifier U4, carry out A/D conversion, digital quantity after conversion carries out MPPT computing by single-chip microcomputer 5, the operation result of gained goes the dutycycle of pulse in the PCA module of adjustment single-chip microcomputer 5, the output state of 10 pin to driver U1 of single-chip microcomputer 5 controls, then this pulse drives field effect transistor Q1 by driver U1, PWM is carried out to field effect transistor Q1, opening and the shut-in time by field effect transistor Q1, the output voltage of solar cell S is made to always work near maximum power point, whole charging system is made to reach top efficiency.
Claims (7)
1. the solar energy system control structure based on MPPT, it is characterized in that: it comprises MPPT control circuit, solar array voltage sample circuit, battery tension sample circuit, charge current sample circuit, single-chip microcomputer, solar cell and accumulator are powered to described MPPT control circuit simultaneously, and described solar cell and accumulator are corresponding to described solar array voltage sample circuit respectively, battery tension sample circuit is powered, described solar array voltage sample circuit, battery tension sample circuit, charge current sample circuit is all connected signal transmission with described single-chip microcomputer, described single-chip microcomputer outputs signal to described MPPT control circuit.
2. a kind of solar energy system control structure based on MPPT according to claim 1, is characterized in that: described single-chip microcomputer adopts model STC12C5202AD single-chip microcomputer.
3. a kind of solar energy system control structure based on MPPT according to claim 1, it is characterized in that: described MPPT control circuit comprises DC/DC varying circuit, switch tube driving circuit, described DC/DC varying circuit correspondence connects described switch tube driving circuit, and described DC/DC varying circuit adopts the topological circuit of Roche voltage-dropping type.
4. a kind of solar energy system control structure based on MPPT according to claim 3, is characterized in that: described switch tube driving circuit comprises driver U1, diode D1, electric capacity C1, C2, resistance R1, R2, R3, described DC/DC varying circuit comprises field effect transistor Q1, resistance R4, R5, inductance L 1, electric capacity C3, diode D2 ~ D5, described driver U1 adopts model IR2110 driver, 10 pin of described driver U1 are connected to after 11 pin of single-chip microcomputer connect described resistance R1, 3 pin of described driver U1 are connected to after 2 pin of described driver U1 connect described electric capacity C1, the 13 pin ground connection of described driver U1, 5 pin of described driver U1 connect one end of described electric capacity C2, the other end of described electric capacity C2 with connect described diode D1 between 3 pin being connected described driver U1 after be connected to 6 pin of described driver U1,9 of described driver U1, connect described resistance R4 between 11 pin, 10 pin of described single-chip microcomputer connect 11 pin of described driver U1, and 3 pin of described driver U1 connect 9 pin of described driver U1, described diode D4, the negative pole of D5,5 pin of described driver U1 connect described resistance R2, one end of R3,7 pin of described driver U1 connect the positive pole of described diode D2, the other end of resistance R3, the drain electrode of field effect transistor Q1, the other end of described resistance R2 connects the grid of described field effect transistor Q1, the source electrode of described field effect transistor Q1 connects positive pole and the solar cell positive pole S+ of described diode D4, the negative pole of described diode D2 all with one end of described inductance L 1, the negative pole of diode D3 connects, and the positive pole of described diode D3 to connect behind one end of described resistance R5 all ground connection, and the other end of described inductance L 1 connects one end of described electric capacity C3, all battery positive voltage B+ is met, described resistance R5 after the positive pole of diode D5, battery terminal negative B-is all met after the other end connection of electric capacity C3.
5. a kind of solar energy system control structure based on MPPT according to claim 1, it is characterized in that: described solar array voltage sample circuit comprises voltage follower U2, resistance R6, R7, described resistance R7 one end ground connection, one end of described resistance R6 connects solar cell positive pole S+, be connected to 5 pin of described voltage follower U2 after the other end of described resistance R6, R7 is connected, 6,7 pin of described voltage follower U2 are connected and connect 22 pin of described single-chip microcomputer.
6. a kind of solar energy system control structure based on MPPT according to claim 1, it is characterized in that: described battery tension sample circuit comprises voltage follower U3, resistance R8, R9, described resistance R9 one end ground connection, one end of described resistance R8 connects battery positive voltage B+, be connected to 10 pin of described voltage follower U3 after the other end of described resistance R8, R9 is connected, 8,9 pin of described voltage follower U3 are connected and connect 18 pin of described single-chip microcomputer.
7. a kind of solar energy system control structure based on MPPT according to claim 1, it is characterized in that: described charge current sample circuit comprises voltage amplifier U4, electric capacity C4, resistance R10 ~ R14, 14 pin of described voltage amplifier U4 are connected to after 19 pin of described single-chip microcomputer connect described resistance R10, and connect one end of described resistance R11, the other end of described resistance R11 and one end of described resistance R12, 13 pin of voltage amplifier U4 are all connected, 12 pin of described voltage amplifier U4 and described resistance R13, one end of electric capacity C4 is all connected, battery terminal negative B-is connected to after the other end of described resistance R13 is connected with one end of described resistance R14, described R12, R14, the all connected rear ground connection of the other end of electric capacity C4.
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| CN201520071826.7U CN204423224U (en) | 2015-02-02 | 2015-02-02 | A kind of solar energy system control structure based on MPPT |
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| CN201520071826.7U CN204423224U (en) | 2015-02-02 | 2015-02-02 | A kind of solar energy system control structure based on MPPT |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105263237A (en) * | 2015-11-16 | 2016-01-20 | 西安科技大学 | Novel solar lighting street lamp |
| CN111290471A (en) * | 2020-02-20 | 2020-06-16 | 南京工程学院 | Novel maximum power tracking microcontroller of thermoelectric power generation system |
| CN112355994A (en) * | 2020-11-09 | 2021-02-12 | 三门核电有限公司 | Portable intelligent charging toolbox |
| CN114189030A (en) * | 2021-12-07 | 2022-03-15 | 北京煜邦电力技术股份有限公司 | Battery control system |
-
2015
- 2015-02-02 CN CN201520071826.7U patent/CN204423224U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105263237A (en) * | 2015-11-16 | 2016-01-20 | 西安科技大学 | Novel solar lighting street lamp |
| CN111290471A (en) * | 2020-02-20 | 2020-06-16 | 南京工程学院 | Novel maximum power tracking microcontroller of thermoelectric power generation system |
| CN112355994A (en) * | 2020-11-09 | 2021-02-12 | 三门核电有限公司 | Portable intelligent charging toolbox |
| CN112355994B (en) * | 2020-11-09 | 2022-02-15 | 三门核电有限公司 | Portable intelligent charging toolbox |
| CN114189030A (en) * | 2021-12-07 | 2022-03-15 | 北京煜邦电力技术股份有限公司 | Battery control system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150624 Termination date: 20180202 |
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| CF01 | Termination of patent right due to non-payment of annual fee |