CN207301851U - Photovoltaic maximal power tracing controller - Google Patents
Photovoltaic maximal power tracing controller Download PDFInfo
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- CN207301851U CN207301851U CN201721376073.6U CN201721376073U CN207301851U CN 207301851 U CN207301851 U CN 207301851U CN 201721376073 U CN201721376073 U CN 201721376073U CN 207301851 U CN207301851 U CN 207301851U
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 230000003750 conditioning effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 description 7
- 238000012913 prioritisation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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Abstract
The utility model discloses photovoltaic maximal power tracing controller, including voltage detecting circuit, current detection circuit, DC/DC conversion circuits, drive circuit, MPPT control circuits and load；Voltage detecting circuit, current detection circuit are respectively used to the output voltage of detection photovoltaic cell, output current, the input terminal of the output terminal of voltage detecting circuit, the output terminal of current detection circuit respectively with MPPT control circuits is connected, the output terminal of MPPT control circuits and the input terminal of drive circuit connect, the output terminal of drive circuit is connected with the input terminal of DC/DC conversion circuits, the output terminal of DC/DC conversion circuits is connected with load, meanwhile the input terminal of DC/DC conversion circuits is connected with the output terminal of photovoltaic cell.Processing is optimized to traditional controller in the utility model, it is possible to achieve realize photovoltaic maximum power output in different environments, have simple in structure, stability is good, and response is fast, it is high-precision the advantages that.
Description
Technical field
Photovoltaic maximal power tracing controller is the utility model is related to, belongs to photovoltaic generation control technology field.
Background technology
Photovoltaic generation environmental protection is renewable, and is directed to the shortcomings that its Maximum Power Output is affected by environment larger, is proposed
In MPPT maximum power point tracking (Maximum Power Point Tracking, MPPT) controller, perturbation observation method is with its algorithm
Simply, realize return circuit module and extensive use.But traditional perturbation observation method system optimal state is attached in maximum power point
Nearly fluctuation, can not realize real stabilization.
Utility model content
Technical problem to be solved in the utility model is：Photovoltaic maximal power tracing controller is provided, can stablize can
That leans on realizes photovoltaic maximum power control, reduces and is fluctuated present in traditional approach.
The utility model uses following technical scheme to solve above-mentioned technical problem：
Photovoltaic maximal power tracing controller, including voltage detecting circuit, current detection circuit, DC/DC conversion circuits, drive
Dynamic circuit, MPPT control circuits and load；The voltage detecting circuit, current detection circuit are respectively used to detection photovoltaic cell
Output voltage, output current, the output terminal of voltage detecting circuit, the output terminal of current detection circuit respectively with MPPT control electricity
The input terminal of the input terminal connection on road, the output terminals of MPPT control circuits and drive circuit connects, the output terminal of drive circuit with
The input terminal connection of DC/DC conversion circuits, output terminal and the load of DC/DC conversion circuits connect, meanwhile, DC/DC conversion circuits
Input terminal be connected with the output terminal of photovoltaic cell.
As the further prioritization scheme of the utility model, the controller further includes signal conditioning circuit, the voltage
The output terminal of detection circuit, the output terminal of current detection circuit are respectively after signal conditioning circuit, with MPPT control circuits
Input terminal connects.
As the further prioritization scheme of the utility model, the drive circuit uses M57962L chips.
As the further prioritization scheme of the utility model, the MPPT control circuits use dsPIC30F4011 chips.
As the further prioritization scheme of the utility model, the switching device of the DC/DC conversion circuits uses insulated gate
Bipolar transistor.
The utility model compared with prior art, has following technique effect using above technical scheme：
The utility model proposes one kind, with microcontroller, chip, Hall voltage current sensor are signal detection component in order to control
Photovoltaic maximal power tracing controller.Processing is optimized to traditional controller, it is possible to achieve in different environments
Realize photovoltaic maximum power output, have simple in structure, stability is good, and response is fast, it is high-precision the advantages that.
Brief description of the drawings
Fig. 1 is the integrated stand composition of the utility model photovoltaic maximal power tracing controller.
Fig. 2 is the circuit structure diagram of the utility model voltage detecting circuit and current detection circuit.
Fig. 3 is the circuit structure diagram of the utility model drive circuit.
Fig. 4 is the circuit structure diagram of the utility model MPPT control circuits.
Fig. 5 is the perturbation observation method flow chart that the utility model MPPT control circuits use.
Embodiment
The embodiment of the utility model is described below in detail, the example of the embodiment is shown in the drawings.Below
The embodiment described by reference to attached drawing is exemplary, and is only used for explaining the utility model, and cannot be construed to this reality
With new limitation.
As shown in Figure 1, be the integrated stand composition of the utility model photovoltaic maximal power tracing controller, including voltage detecting
Circuit, current detection circuit, DC/DC conversion circuits, drive circuit, MPPT control circuits and load.Wherein, MPPT controls electricity
The PIC single chip microcomputer that route can send PWM ripples is formed, and the input terminal of drive circuit is connected with PIC single chip microcomputer, its output terminal and DC/
The switching device IGBT of DC conversion circuits is connected.The input terminal of PIC single chip microcomputer is connected with voltage detecting circuit, current detection circuit
And produce one group of feedback PWM ripple to drive circuit, voltage detecting circuit, current detection circuit be respectively used to detection photovoltaic cell with
The output voltage and electric current of environmental change.The input terminal of DC/DC conversion circuits is connected with photovoltaic cell output terminal, output terminal connection
Load.DC/DC conversion circuits switching device selection insulated gate bipolar transistor (Insulated Gate Bipolar therein
Transistor, IGBT) and IGBT control terminals be connected with drive circuit.
Voltage detecting circuit, current detection circuit use Hall voltage current sensor, and Hall voltage current sensor is first
It is connected with signal conditioning circuit after reaching PIC single chip microcomputer input signal standard and is connected again with PIC single chip microcomputer input terminal.
Based on DC/DC conversion circuits, the output of photovoltaic cell is connected with DC/DC conversion circuits and acts on load.
Exported by Hall voltage current sensor measurement photovoltaic and give data to MPPT control circuits, computing is carried out by MPPT control circuits
Pwm control signal is sent afterwards and gives control of the drive circuit completion to switching tube in DC-DC conversion circuits, controls PWM duty cycle
Size adjusts drive signal and then changes output voltage, meets to control the maximal power tracing of output under varying environment.
As shown in Fig. 2, being Hall voltage current sensor circuit, Hall original paper LV28-P has been selected to be passed as voltage and current
Sensor carrys out sampled signal.DC/DC conversion circuits and load are collectively thought of as the equiva lent impedance of photovoltaic cell, are directly acted on
Sampling and outputting voltage and current information are come in photovoltaic cell outlet side both ends.Since the photovoltaic cell that sensor is collected exports electricity
Stream be one quickly change cannot be directly AD converted by MPPT control circuits, so to it with the addition of one maintain amplification
Circuit.Since the ADC module of the MPPT control circuits of selection can only receive the analog signal of below 5V, so again in sample circuit
In with the addition of diode D1, D2 ensure input MPPT control circuits analog electrical signal be no more than 5V.
It is the driving for IGBT realized by M57962L as shown in figure 3, being drive circuit.R3 plays resistance
The effect of Rg, the selection to R3 influence whether the switch time of IGBT.Bi-directional voltage stabilizing pipe D3, D4, D5 ensure that grid and transmitting
Will not be breakdown and damage circuit in pole.Pin 5 can change output level according to the incoming level of pin 14, when pin 14 inputs
IGBT is turned on more than when limiting level high level will be exported by 5 feet, when pin 14 does not input, No. 5 pins are at this time
Low level can be exported.One group of PWM ripple is produced after being handled under normal operating conditions by chip dsPIC30F4011, adjusts its duty cycle
To match the incoming level of 14 pins, and then the gate pole level of IGBT is controlled to realize the adjusting to equiva lent impedance.When IGBT's
When drain voltage rise is more than 15V, a set of overload protection measures for IGBT are had.D1 will be cut as isolating diode
Only, it is the high level of 15V on pin 1 at this time, can thus allows No. 5 pins to become low level so that IGBT ends, at the same time 8
Number pin is also placed in the such optocoupler of low level and begins to work producing one group of drive signal so that input terminal is put height by external circuits
Level, such M57962L have just recovered original state.
As shown in figure 4, being MPPT control circuits, sampled signal is handled, it is necessary to be first AD converted, therefore select
Take built-in 10 A/D modular converters and taken into account the chip dsPIC30F4011 of 16 impulse- free robustness PWM modes and be used as microprocessor
Device.Wherein No. 2 pins are connected with the output of voltage detecting circuit, and No. four pins are connected with the output of current detection circuit.And lead to
Cross after built-in ADC module carries out A/D conversions and calculated by MPPT algorithm from the 37th pin one group of controllable PWM waveform of output
To drive circuit.No. 8 pins of No. 17 pin and drive circuit therein are connected to form error protection.
As shown in figure 5, it is the flow chart of perturbation observation method, the actual MPPT controls of photovoltaic array are exactly that continuous adjustment is negative
Impedance is carried, its value is matched with maximum power of photovoltaic cell output impedance.Conversion circuit and rear class output are regarded as herein
Equiva lent impedance, changes the voltage and power that photovoltaic cell exports by disturbing the duty cycle of conversion circuit.To solar cell
Output current and voltage be monitored, the power of the power that this group of data are calculated preceding state therewith carries out control meter
Size is calculated, its increase is realized that output power is rectified to the direction of increase if just adjusting PWM duty cycle △ D less than previous value
Just, the opposite PWM duty cycle △ D that still adjusted if if more than previous value make it reduce to keep the increase of output power to become
Gesture.Searched out by disturbance repeatedly near maximum power point.When this process has proceeded near maximum power point, it is
Eliminate due to system self-defect cause its perturbation process can hover always near the maximum power point and caused by energy wave
Take and introduce a reference voltage Vref.The value of preferred adjustment reference voltage becomes towards maximum power point at the end of comparison
Change, finally when the difference of output power and reference value is less than given area, it is believed that system stable operation is in maximum power
Near point, it can be reference voltage level by output adjustment, not continue to disturb.And the working characteristics of photovoltaic is come really with reference to reference voltage
It is fixed.In view of the output of solar panel in a short time is stable, and system is for the of less demanding of quick response, therefore
The step-length of selection of small can be more accurately close to maximum power point.
Above example is only to illustrate the technological thought of the utility model, it is impossible to the protection model of the utility model is limited with this
Enclose, it is every according to the utility model proposes technological thought, any change done on the basis of technical solution, each falls within this reality
Within the scope of novel protected.
Claims (5)
1. photovoltaic maximal power tracing controller, it is characterised in that turn including voltage detecting circuit, current detection circuit, DC/DC
Change circuit, drive circuit, MPPT control circuits and load；The voltage detecting circuit, current detection circuit are respectively used to examine
Survey the output voltage of photovoltaic cell, output current, the output terminal of voltage detecting circuit, the output terminal of current detection circuit respectively with
The input terminal connection of MPPT control circuits, the output terminal of MPPT control circuits and the input terminal of drive circuit connect, drive circuit
Output terminal be connected with the input terminal of DC/DC conversion circuits, the output terminals of DC/DC conversion circuits is connected with load, meanwhile, DC/
The input terminal of DC conversion circuits is connected with the output terminal of photovoltaic cell.
2. photovoltaic maximal power tracing controller according to claim 1, it is characterised in that the controller further includes signal
Modulate circuit, the output terminal of the voltage detecting circuit, the output terminal of current detection circuit respectively after signal conditioning circuit,
It is connected with the input terminal of MPPT control circuits.
3. photovoltaic maximal power tracing controller according to claim 1, it is characterised in that the drive circuit uses
M57962L chips.
4. photovoltaic maximal power tracing controller according to claim 1, it is characterised in that the MPPT control circuits use
DsPIC30F4011 chips.
5. photovoltaic maximal power tracing controller according to claim 1, it is characterised in that the DC/DC conversion circuits
Switching device uses insulated gate bipolar transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721376073.6U CN207301851U (en) | 2017-10-24 | 2017-10-24 | Photovoltaic maximal power tracing controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721376073.6U CN207301851U (en) | 2017-10-24 | 2017-10-24 | Photovoltaic maximal power tracing controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207301851U true CN207301851U (en) | 2018-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721376073.6U Active CN207301851U (en) | 2017-10-24 | 2017-10-24 | Photovoltaic maximal power tracing controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111665391A (en) * | 2019-03-08 | 2020-09-15 | 杭州海康威视数字技术股份有限公司 | Power class detection device |
-
2017
- 2017-10-24 CN CN201721376073.6U patent/CN207301851U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111665391A (en) * | 2019-03-08 | 2020-09-15 | 杭州海康威视数字技术股份有限公司 | Power class detection device |
| CN111665391B (en) * | 2019-03-08 | 2022-11-25 | 杭州海康威视数字技术股份有限公司 | Power level detection device |
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