CN201876750U - Automatic voltage regulation circuit of solar photovoltaic power generation system - Google Patents
Automatic voltage regulation circuit of solar photovoltaic power generation system Download PDFInfo
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- CN201876750U CN201876750U CN2010205858798U CN201020585879U CN201876750U CN 201876750 U CN201876750 U CN 201876750U CN 2010205858798 U CN2010205858798 U CN 2010205858798U CN 201020585879 U CN201020585879 U CN 201020585879U CN 201876750 U CN201876750 U CN 201876750U
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Abstract
The utility model provides an automatic voltage regulation circuit of a solar photovoltaic power generation system, which comprises an auxiliary power supply circuit, an input voltage stabilizing capacitor, a boost inductor, an insulated gate transistor, a fly-wheel diode, a first diode, a control driving circuit, an output voltage stabilizing capacitor, a load and a sampling circuit. The boost inductor is connected with the input voltage stabilizing capacitor and the insulated gate transistor; the insulated gate transistor is connected with the control driving circuit and the input voltage stabilizing capacitor; the fly-wheel diode is connected with the insulated gate transistor; the first diode is connected with the insulated gate transistor and the load; the output voltage stabilizing capacitor is connected with the first diode and the fly-wheel diode; the load is respectively connected with the output voltage stabilizing capacitor and the acquisition circuit; and the acquisition circuit is connected with the input voltage stabilizing capacitor, the load, the output voltage stabilizing capacitor and the control driving circuit. The automatic voltage regulation circuit needs no singlechip support and can realize constant-power output and power supply to the load.
Description
Technical field
The utility model belongs to the voltage-regulating technique field, be particularly related to a kind of automatic voltage regulating circuit of solar photovoltaic generation system, can realize that promptly solar panel provides the function of burning voltage under solar photovoltaic generation system is weak at solar irradiation, photovoltaic voltage the is lower situation to load.
Background technology
At present, non-renewable energy resources such as coal, oil day by day reduce in the global range, simultaneously, are that the power industry of main energy sources has been brought serious pollution problem to environment with coal.Countries in the world are all actively being sought, are being tapped a new source of energy, and gradually sight are transferred in the research, development and utilization of renewable, clean energy resource.Under this background, sun power so that its global total storage capacity is big, development and use property is good, the characteristics of cleanliness without any pollution, has been climbed up historical stage as a kind of new energy utilization patterns as a kind of new energy form in the time of nearly decades.
About solar electrical energy generation, general method is: absorb and sunshine is changed into electric energy by solar cell, then by the voltage regulator controllers voltage stabilizing and export galvanic current.Because the output power instability of solar cell, particularly output current changes greatly under load-carrying situation, in order to obtain permanent power, more stable electric current output, adopts the voltage regulator controllers that is particularly related to control in the prior art usually.And voltage regulator controllers commonly used generally all needs the support of single-chip microcomputer or DSP technology and just can realize, and has defectives such as circuit structure complexity, electric energy loss are big.
The utility model content
The shortcoming that primary and foremost purpose of the present utility model is to overcome above-mentioned prior art provides a kind of simple and reasonable for structure with not enough, can be the automatic voltage regulating circuit that solar photovoltaic generation system provides the solar photovoltaic generation system of permanent power, steady current.
For reaching above-mentioned purpose, the utility model adopts following technical scheme:
A kind of automatic voltage regulating circuit of solar photovoltaic generation system, comprise auxiliary power circuit, input electric capacity of voltage regulation, boost inductance, gated transistor, fly-wheel diode, first diode, control Driver Circuit, output electric capacity of voltage regulation, load and sample circuit, described input electric capacity of voltage regulation is connected on the photovoltaic generating system outward; One end of described boost inductance is connected with the positive pole of input electric capacity of voltage regulation, and the other end is connected with the collector of gated transistor; The grid of described gated transistor is connected with control Driver Circuit, and its emitter is connected with the negative pole of input electric capacity of voltage regulation; The anode of described fly-wheel diode is connected with the emitter of gated transistor, and its negative electrode is connected with the collector of gated transistor; The anode of described first diode is connected with the collector of gated transistor, and its negative electrode is connected with load; The positive pole of output electric capacity of voltage regulation is connected with the negative electrode of first diode, and its negative pole is connected with the anode of fly-wheel diode; Described load is connected with output electric capacity of voltage regulation, Acquisition Circuit respectively; Described Acquisition Circuit is connected with input electric capacity of voltage regulation, load, output electric capacity of voltage regulation, control Driver Circuit respectively.
Described input electric capacity of voltage regulation comprises first electric capacity of voltage regulation and second electric capacity of voltage regulation, and first electric capacity of voltage regulation is in parallel with second electric capacity of voltage regulation; The anodal of the positive pole of first electric capacity of voltage regulation and second electric capacity of voltage regulation all is connected with an end of boost inductance; The negative pole of the negative pole of first electric capacity of voltage regulation and second electric capacity of voltage regulation all is connected with the emitter of gated transistor.
Described control Driver Circuit comprises first triode, second triode, the 3rd triode, comparer, summing circuit, subtractor circuit, multiplier, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance and the 12 resistance, the grounded emitter of described first triode, its base stage is connected with comparer, and its collector is connected with the base stage of second triode; The base stage of second triode is connected with the base stage of the 3rd triode, and its emitter is connected with the collector of the 3rd triode, the grid of gated transistor respectively, and its collector is connected with an end of the 12 resistance; The other end of the 12 resistance is connected with the 11 resistance, auxiliary power circuit respectively; The base stage of the other end of the 11 resistance and second triode; The collector of the 3rd triode is connected with the grid of gated transistor, and its emitter is connected with auxiliary power circuit; The positive pole of described comparer is connected with summing circuit, and its negative pole is connected with Acquisition Circuit; A positive terminal of described summing circuit is connected with the 7th resistance, the 8th resistance respectively, and its another positive terminal is connected with subtractor circuit; The other end of the 7th resistance is connected with auxiliary power circuit, the other end ground connection of the 8th resistance; Described the 7th resistance, the 9th resistance, the tenth resistance connect successively, and the tenth resistance eutral grounding; One end of described subtractor circuit is connected between the 9th resistance and the tenth resistance, and the other end is connected with multiplier, and multiplier is connected with Acquisition Circuit.
Described sample circuit comprises first resistance, second resistance, the 3rd resistance, the 4th resistance and current sensor, described first resistance is connected with second resistance, the other end of first resistance is connected between the positive pole and boost inductance of input electric capacity of voltage regulation, and the other end of second resistance is connected between the emitter of input negative pole of electric capacity of voltage regulation and gated transistor; Described the 3rd resistance is connected with the 4th resistance, and the other end of the 3rd resistance is connected with the positive pole of load, output electric capacity of voltage regulation, and the other end of the 4th resistance is connected with the negative pole of output electric capacity of voltage regulation; The positive pole of described current sensor is connected with load, and its negative pole is connected with the negative pole of output electric capacity of voltage regulation, and its test lead is connected with control Driver Circuit; Between described the 3rd resistance and the 4th resistance, be respectively equipped with output terminal between the 3rd resistance and the 4th resistance, described output terminal all is connected with control Driver Circuit.
The test lead of described current sensor is connected with multiplier in the control Driver Circuit.
Be provided with output terminal between described first resistance and second resistance, described output terminal is connected with comparer in the control Driver Circuit; Be provided with output terminal between described the 3rd resistance and the 4th resistance, described output terminal is connected with multiplier in the control Driver Circuit.
Described input electric capacity of voltage regulation is connected on outward on the output terminal of solar panel of photovoltaic generating system.
Described auxiliary power circuit comprises voltage stabilizing chip the one, the 3rd electric capacity, the 4th electric capacity, the 4th diode, voltage stabilizing chip the two, the 5th electric capacity, the 6th electric capacity, the 5th diode, voltage stabilizing chip the three, the 7th electric capacity, the 5th resistance, the 6th resistance, the 8th electric capacity, the 6th diode, the 7th diode and the 9th electric capacity, described voltage stabilizing chip one comprises pin one, pin two and pin three, its pin one is connected with the positive pole of input electric capacity of voltage regulation, the positive pole of the 3rd electric capacity respectively, and its pin two is connected with the negative pole of the 3rd electric capacity; The two ends of the 4th electric capacity are connected with pin two, the pin three of voltage stabilizing chip one respectively; The negative electrode of described the 4th diode is connected with the pin three of voltage stabilizing chip one, and its anode is connected with the pin two of voltage stabilizing chip one; The pin two of voltage stabilizing chip one is connected with control Driver Circuit respectively with pin three;
Described voltage stabilizing chip two comprises pin one, pin two and pin three, and its pin one is connected with the positive pole of input electric capacity of voltage regulation, the positive pole of the 5th electric capacity respectively, and its pin two is connected with the negative pole of the 5th electric capacity; The two ends of the 6th electric capacity are connected with pin two, the pin three of voltage stabilizing chip two respectively; The negative electrode of described the 4th diode is connected with the pin three of voltage stabilizing chip two, and its anode is connected with the pin two of voltage stabilizing chip two; The pin two of voltage stabilizing chip two is connected with control Driver Circuit respectively with pin three; The negative electrode of the 5th diode is connected with the pin three of voltage stabilizing chip two, and its anode is connected with the pin two of voltage stabilizing chip two;
Described voltage stabilizing chip three comprises pin one, pin two and pin three, and its pin one is connected with the positive pole of input electric capacity of voltage regulation, the positive pole of the 7th electric capacity respectively, and its pin two is connected with the 5th resistance, and the other end of the 5th resistance is connected with the negative pole of the 7th electric capacity; One end of the 8th electric capacity is connected with the negative pole of the 7th electric capacity, and the other end is connected with the anode of the 6th resistance, the 7th diode; The negative electrode of the other end of the 6th resistance, the 7th diode all is connected with the pin three of voltage stabilizing chip three; The negative electrode of the 6th diode is connected with pin one, and its anode is connected with pin three; Described pin three is connected with control Driver Circuit; One end of described the 9th electric capacity and the negative pole of the 7th electric capacity, the other end is connected with control Driver Circuit; The negative pole of the 7th electric capacity is connected with control Driver Circuit.
Voltage stabilizing chip one, voltage stabilizing chip two, voltage stabilizing chip three are preferably voltage stabilizing chip 7805, voltage stabilizing chip 7905, voltage stabilizing chip LM317K respectively.
First triode, the 3rd triode are the pnp transistor, and second triode is the npn transistor.
The automatic Regulation process of the solar photovoltaic generation system of being realized by foregoing circuit comprises the steps:
(1) solar photovoltaic generation system energising, the input voltage of the voltage at solar photovoltaic generation system two ends in the setting range value, changing, at this moment, input voltage carries out voltage stabilizing by the input electric capacity of voltage regulation;
(2) the stable input voltage after the voltage stabilizing rises to certain output voltage by boost inductance, gated transistor and first diode, described output voltage carries out voltage stabilizing by the output electric capacity of voltage regulation to it, regulated output voltage after the voltage stabilizing offers load and uses, and the electric current of load simultaneously carries out afterflow by fly-wheel diode;
(3) solar photovoltaic generation system or auxiliary power circuit are the Acquisition Circuit power supply, Acquisition Circuit is gathered in real time and is monitored the voltage at solar photovoltaic generation system two ends and the output voltage at load two ends, and sends acquired signal and monitored signal to control Driver Circuit;
(4) control Driver Circuit is handled the collection and the monitored signal of step (2), controls the break-make situation of first triode according to the result who handles, and then the controlling and driving gated transistor, so that gated transistor produces the PWM waveform;
(5) voltage of gated transistor readjusts, stable input voltage after the voltage stabilizing of input electric capacity of voltage regulation readjusts to certain output voltage by boost inductance, gated transistor and first diode, described output voltage carries out voltage stabilizing by the output electric capacity of voltage regulation to it, regulated output voltage after the voltage stabilizing offers load and uses, to realize the real-time adjustment to the output voltage at load two ends.
In the described step (3), specifically comprise the steps:
(3-1) output voltage at the 3rd resistance and the 4th electrical resistance collection load two ends, and the numerical signal of output voltage is sent in the multiplier of control Driver Circuit;
(3-2) current sensor is gathered the output current of load, and the numerical signal of output current is sent in the multiplier of control Driver Circuit;
(3-3) first resistance and the second electrical resistance collection input voltage, and the numerical signal of input voltage is sent in the comparer of control Driver Circuit;
In the described step (4), specifically comprise the steps:
(4-1) numerical signal of the output current gathered of the output voltage gathered of the multiplier receiving step (3-1) of control Driver Circuit and step (3-2), and output voltage and output current are carried out multiplication process by multiplier, be converted into the output power signal;
(4-2) subtractor circuit of control Driver Circuit is tried to achieve the output power of step (4-1) gained and the difference size of reference power by comparison process, and both differences obtain adjusting sawtooth wave through the processing of suing for peace of summing circuit and sawtooth wave;
(4-3) numerical signal of the input voltage of comparer receiving step (3-3) gained of control Driver Circuit, and amplitude and this input voltage that will adjust sawtooth wave compare, and generates the PWM waveform; When the amplitude of adjusting sawtooth wave during less than input voltage, first triode is open-minded, the 3rd triode conducting simultaneously, and the collector by the 3rd triode is to the gated transistor output low level; When the amplitude of adjusting zig-zag during greater than input voltage, first triode disconnects, and the second triode conducting is simultaneously exported high level by the emitter of second triode to gated transistor.
In solar photovoltaic generation system,, establish solar photovoltaic and be pressed in [V along with the power change of solar irradiation
Min, V
Max] go up variation, the voltage at solar photovoltaic generation system two ends is input voltage, and the voltage at load two ends is output voltage, and after the input electric capacity of voltage regulation carried out voltage stabilizing to input voltage, establishing its stable voltage was Vin; Boost to load required voltage V through boost inductance, gated transistor and first diode again
Out, V
OutBy output electric capacity of voltage regulation C
OutVoltage stabilizing.Satisfy relation between input voltage, the output voltage:
Wherein α is a dutycycle, V
OutBe output voltage, Vin is the stable voltage after the input voltage voltage stabilizing, and the size that therefore changes dutycycle is the scalable output voltage values.
The utility model produces the pwm signal ripple and regulates output voltage values by to the photovoltaic signal sampling, to keep the stable of output voltage.
Sample circuit is gathered input voltage vin, and it is compared with regulating sawtooth wave, and the output noble potential is+15V, and electronegative potential is-the PWM waveform of 5V.As input voltage V
InDuring rising, duty cycle alpha reduces, and makes output voltage V
OutReduce; When input voltage vin reduced, duty cycle alpha increased, and made output voltage V
OutIncrease.In addition, sample circuit is gathered output voltage V out and output current Iout and is converted thereof into the output power signal, this signal and reference power signal ask poor, then with difference and sawtooth wave summation, adjusting sawtooth wave that gained is new and input voltage sampled value Vin compare and generate the PWM waveform, adjusting dutycycle size can realize firm power output.
This circuit is used+5V ,-5V and+the 15V current potential all comes from auxiliary power circuit, obtain by the voltage stabilizing chip one in the auxiliary power circuit, voltage stabilizing chip two, voltage stabilizing chip three respectively, be Acquisition Circuit and control Driver Circuit power supply, do not need additionally to insert battery, therefore can realize energy-efficient.
Compared with prior art, the utlity model has following advantage and beneficial effect:
(1) the utility model has designed a kind of more energy-conservation regulating circuit, and it does not only need the support of single-chip microcomputer or DSP technology, and circuit is simpler, and can realize permanent power output, powering load preferably.
(2) the utility model can be saved the problem of circuit energy consumption, and need not use any controller chip in circuit, does not therefore need extraneous power supply, can be detected automatically by this circuit and regulate pressure regulation automatically, to reach user demand.
(3) of the present utility model simple and reasonable for structure, and cost is lower, can reach energy-conservation requirement.
Description of drawings
Fig. 1 is the general structure synoptic diagram of the utility model circuit.
Fig. 2 is the structural representation of control Driver Circuit shown in Figure 1.
Fig. 3 is the structural representation of auxiliary power circuit shown in Figure 1.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.
Embodiment
As shown in Figure 1, the automatic voltage regulating circuit of this solar photovoltaic generation system, comprise auxiliary power circuit 2, input electric capacity of voltage regulation, boost inductance 27, gated transistor 28, fly-wheel diode 30, first diode 29, control Driver Circuit 3, output electric capacity of voltage regulation 31, load 36 and sample circuit, described input electric capacity of voltage regulation is connected on the photovoltaic generating system outward; One end of described boost inductance 27 is connected with the positive pole 5 of input electric capacity of voltage regulation, and the other end is connected with the collector of gated transistor 28; The grid of described gated transistor 28 is connected with control Driver Circuit 3, and its emitter is connected with the negative pole 6 of input electric capacity of voltage regulation; The anode of described fly-wheel diode 30 is connected with the emitter of gated transistor 28, and its negative electrode is connected with the collector of gated transistor 28; The anode of described first diode 29 is connected with the collector of gated transistor 28, and its negative electrode is connected with load 36; The positive pole of output electric capacity of voltage regulation 31 is connected with the negative electrode of first diode 29, and its negative pole is connected with the anode of fly-wheel diode 30; Described load 36 is connected with output electric capacity of voltage regulation 31, Acquisition Circuit respectively; Described Acquisition Circuit is connected with input electric capacity of voltage regulation, load 36, output electric capacity of voltage regulation 31, control Driver Circuit 3 respectively.
Described input electric capacity of voltage regulation comprises that first electric capacity of voltage regulation 23 and second electric capacity of voltage regulation, 24, the first electric capacity of voltage regulation 23 are in parallel with second electric capacity of voltage regulation 24; The anodal of the positive pole of first electric capacity of voltage regulation 23 and second electric capacity of voltage regulation 24 all is connected with an end of boost inductance 27; The negative pole of the negative pole of first electric capacity of voltage regulation 23 and second electric capacity of voltage regulation 24 all is connected with the emitter of gated transistor 28.
As shown in Figure 2, described control Driver Circuit 3 comprises first triode 43, second triode 44, the 3rd triode 45, comparer, summing circuit, subtractor circuit, multiplier, the 7th resistance 39, the 8th resistance 40, the 9th resistance 38, the tenth resistance the 37, the 11 resistance 41 and the 12 resistance 42, the grounded emitter of described first triode 43, its base stage is connected with comparer, and its collector is connected with the base stage of second triode 44; The base stage of second triode 44 is connected with the base stage of the 3rd triode 45, and its emitter is connected with the collector 20 of the 3rd triode 45, the grid of gated transistor 28 respectively, and its collector is connected with an end of the 12 resistance 42; The other end 18 of the 12 resistance 42 is connected with the 11 resistance 41, auxiliary power circuit 2 respectively; The base stage of the other end of the 11 resistance 41 and second triode 44; The collector 20 of the 3rd triode 45 is connected with the grid of gated transistor 28, and its emitter 17 is connected with auxiliary power circuit 2; The positive pole of described comparer is connected with summing circuit, and its negative pole 19 is connected with Acquisition Circuit; A positive terminal of described summing circuit is connected with the 7th resistance 39, the 8th resistance 40 respectively, and its another positive terminal is connected with subtractor circuit; The other end 16 of the 7th resistance 39 is connected with auxiliary power circuit 2, the other end ground connection of the 8th resistance 40; Described the 7th resistance 39, the 9th resistance 38, the tenth resistance 37 connect successively, and the tenth resistance 37 ground connection; One end of described subtractor circuit is connected between the 9th resistance 38 and the tenth resistance 37, and the other end is connected with multiplier, and the input end 21 of multiplier all is connected with Acquisition Circuit with input end 22.
Described sample circuit comprises first resistance 25, second resistance 26, the 3rd resistance 32, the 4th resistance 33 and current sensor 4, described first resistance 25 is connected with second resistance 26, the other end of first resistance 25 is connected between the positive pole 5 and boost inductance 27 of input electric capacity of voltage regulation, and the other end of second resistance 26 is connected between the emitter of the negative pole 6 of importing electric capacity of voltage regulation and gated transistor 28; Described the 3rd resistance 32 is connected with the 4th resistance 33, and the other end of the 3rd resistance 32 is connected with the positive pole of load 36, output electric capacity of voltage regulation 31, and the other end of the 4th resistance 33 is connected with the negative pole of output electric capacity of voltage regulation 31; The positive pole of described current sensor 4 is connected with load 36, and its negative pole is connected with the negative pole of output electric capacity of voltage regulation 31, and its test lead 11 is connected with control Driver Circuit 3; Between described the 3rd resistance 32 and the 4th resistance 33, be respectively equipped with output terminal between the 3rd resistance 32 and the 4th resistance 33, described output terminal all is connected with control Driver Circuit 3.
The test lead 11 of described current sensor 4 is connected with multiplier in the control Driver Circuit 3.
Be provided with output terminal 9 between described first resistance 25 and second resistance 26, described output terminal 9 is connected with comparer in the control Driver Circuit 3; Be provided with output terminal 12 between described the 3rd resistance 32 and the 4th resistance 33, described output terminal 12 is connected with multiplier in the control Driver Circuit 3.
Described input electric capacity of voltage regulation is connected on outward on the output terminal of solar panel 1 of photovoltaic generating system.
As shown in Figure 3, described auxiliary power circuit 2 comprises voltage stabilizing chip one, the 3rd electric capacity 46, the 4th electric capacity 47, the 4th diode 48, voltage stabilizing chip two, the 5th electric capacity 49, the 6th electric capacity 58, the 5th diode 50, voltage stabilizing chip three, the 7th electric capacity 51, the 5th resistance 52, the 6th resistance 53, the 8th electric capacity 54, the 6th diode 55, the 7th diode 56 and the 9th electric capacity 57, described voltage stabilizing chip one comprises pin 1, pin two and pin 3 13, its pin 1 respectively with the input electric capacity of voltage regulation positive pole 5, the positive pole of the 3rd electric capacity 46 connects, and its pin two is connected with the negative pole of the 3rd electric capacity 46; The two ends of the 4th electric capacity 47 are connected with pin two, the pin three of voltage stabilizing chip one respectively; The negative electrode of described the 4th diode 48 is connected with the pin 3 13 of voltage stabilizing chip one, and its anode is connected with the pin two of voltage stabilizing chip one; The pin two of voltage stabilizing chip one is connected with control Driver Circuit 3 respectively with pin 3 13;
Described voltage stabilizing chip two comprises pin one, pin 27 and pin 3 14, and its pin one is connected with the positive pole 5 of input electric capacity of voltage regulation, the positive pole of the 5th electric capacity 49 respectively, and its pin 27 is connected with the negative pole of the 5th electric capacity 49; The two ends of the 6th electric capacity 58 are connected with pin 27, the pin 3 14 of voltage stabilizing chip two respectively; The negative electrode of described the 4th diode 48 is connected with the pin 3 14 of voltage stabilizing chip two, and its anode is connected with the pin 27 of voltage stabilizing chip two; The pin 27 of voltage stabilizing chip two is connected with control Driver Circuit 3 respectively with pin 3 14; The negative electrode of the 5th diode 50 is connected with the pin 3 14 of voltage stabilizing chip two, and its anode is connected with the pin 27 of voltage stabilizing chip two;
Described voltage stabilizing chip three comprises pin one, pin two and pin 3 15, its pin one is connected with the positive pole 5 of input electric capacity of voltage regulation, the positive pole of the 7th electric capacity 51 respectively, its pin two is connected with the 5th resistance 52, and the other end of the 5th resistance 52 is connected with the negative pole of the 7th electric capacity 51; One end of the 8th electric capacity 54 is connected with the negative pole of the 7th electric capacity 51, and the other end is connected with the anode of the 6th resistance 53, the 7th diode 56; The negative electrode of the other end of the 6th resistance 53, the 7th diode 56 all is connected with the pin 3 15 of voltage stabilizing chip three; The negative electrode of the 6th diode 55 is connected with pin one, and its anode is connected with pin 3 15; Described pin 3 15 is connected with control Driver Circuit 3; One end of described the 9th electric capacity 57 and the negative pole of the 7th electric capacity 51, the other end is connected with control Driver Circuit 3; The negative pole of the 7th electric capacity 51 is connected with control Driver Circuit 3.
Voltage stabilizing chip one, voltage stabilizing chip two, voltage stabilizing chip three are respectively voltage stabilizing chip 7805, voltage stabilizing chip 7905, voltage stabilizing chip LM317K.
The automatic Regulation process of the solar photovoltaic generation system of being realized by foregoing circuit comprises the steps:
(1) solar photovoltaic generation system energising, the input voltage of the voltage at solar photovoltaic generation system two ends in the setting range value, changing, at this moment, input voltage carries out voltage stabilizing by the input electric capacity of voltage regulation;
(2) the stable input voltage after the voltage stabilizing rises to certain output voltage by boost inductance 27, gated transistor 28 and first diode 29, described output voltage carries out voltage stabilizing by output electric capacity of voltage regulation 31 to it, regulated output voltage after the voltage stabilizing offers load 36 and uses, and the electric current of load 36 simultaneously carries out afterflow by fly-wheel diode 30;
(3) solar photovoltaic generation system or auxiliary power circuit 2 are the Acquisition Circuit power supply, Acquisition Circuit is gathered in real time and is monitored the voltage at solar photovoltaic generation system two ends and the output voltage at load 36 two ends, and sends acquired signal and monitored signal to control Driver Circuit 3;
(4) collection and the monitored signal of 3 pairs of steps of control Driver Circuit (2) are handled, and control the break-make situation of first triode 43 according to the result who handles, and then controlling and driving gated transistor 28, so that gated transistor 28 produces the PWM waveforms;
(5) voltage of gated transistor 28 readjusts, stable input voltage after the voltage stabilizing of input electric capacity of voltage regulation readjusts to certain output voltage by boost inductance 27, gated transistor 28 and first diode 29, described output voltage carries out voltage stabilizing by output electric capacity of voltage regulation 31 to it, regulated output voltage after the voltage stabilizing offers load 36 and uses, to realize the real-time adjustment to the output voltage at load 36 two ends.
In the described step (3), specifically comprise the steps:
(3-1) the 3rd resistance 32 and the 4th resistance 33 are gathered the output voltage at load 36 two ends, and the numerical signal of output voltage is sent in the multiplier of control Driver Circuit 3;
(3-2) current sensor 4 is gathered the output current of load 36, and the numerical signal of output current is sent in the multiplier of control Driver Circuit 3;
(3-3) first resistance 25 and second resistance 26 are gathered input voltage, and the numerical signal of input voltage is sent in the comparer of control Driver Circuit 3;
In the described step (4), specifically comprise the steps:
(4-1) numerical signal of the output current of the output voltage of the multiplier receiving step (3-1) of control Driver Circuit 3 collection and step (3-2) collection, and output voltage and output current are carried out multiplication process by multiplier, be converted into the output power signal;
(4-2) subtractor circuit of control Driver Circuit 3 is tried to achieve the output power of step (4-1) gained and the difference size of reference power by comparison process, and both differences obtain adjusting sawtooth wave through the processing of suing for peace of summing circuit and sawtooth wave;
(4-3) numerical signal of the input voltage of comparer receiving step (3-3) gained of control Driver Circuit 3, and amplitude and this input voltage that will adjust sawtooth wave compare, and generates the PWM waveform; When the amplitude of adjusting sawtooth wave during less than input voltage, first triode 43 is open-minded, the 3rd triode 45 conductings simultaneously, and the collector by the 3rd triode 45 is to gated transistor 28 output low levels; When the amplitude of adjusting zig-zag during greater than input voltage, first triode 43 disconnects, second triode, 44 conductings simultaneously, and the emitter by second triode 44 is to gated transistor 28 output high level.
In solar photovoltaic generation system, power change along with solar irradiation, if solar photovoltaic is pressed in [Vmin, Vmax] upward change, the voltage at solar photovoltaic generation system two ends is input voltage, the voltage at load 36 two ends is output voltage, and after the input electric capacity of voltage regulation carried out voltage stabilizing to input voltage, establishing its stable voltage was Vin; Boost to load 36 required voltage Vout through boost inductance 27, gated transistor 28 and first diode 29 again, Vout is by output electric capacity of voltage regulation 31Cout voltage stabilizing.Satisfy relation between input voltage, the output voltage:
Wherein α is a dutycycle, and Vout is an output voltage, and Vin is the stable voltage after the input voltage voltage stabilizing, and the size that therefore changes dutycycle is the scalable output voltage values.
The utility model produces the pwm signal ripple and regulates output voltage values by to the photovoltaic signal sampling, to keep the stable of output voltage.
Sample circuit is gathered input voltage vin, and it is compared with regulating sawtooth wave, and the output noble potential is+15V, and electronegative potential is-the PWM waveform of 5V.When input voltage vin raise, duty cycle alpha reduced, and made output voltage V out reduce; When input voltage vin reduced, duty cycle alpha increased, and made output voltage V out increase.In addition, sample circuit is gathered output voltage V out and output current Iout and is converted thereof into the output power signal, this signal and reference power signal ask poor, then with difference and sawtooth wave summation, adjusting sawtooth wave that gained is new and input voltage sampled value Vin compare and generate the PWM waveform, adjusting dutycycle size can realize firm power output.
This circuit is used+5V ,-5V and+the 15V current potential all comes from auxiliary power circuit 2, obtain by the voltage stabilizing chip one in the auxiliary power circuit 2, voltage stabilizing chip two, voltage stabilizing chip three respectively, be Acquisition Circuit and control Driver Circuit 3 power supplies, do not need additionally to insert battery, therefore can realize energy-efficient.
The foregoing description is the utility model preferred implementation; but embodiment of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present utility model and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within the protection domain of the present utility model.
Claims (8)
1. the automatic voltage regulating circuit of a solar photovoltaic generation system, it is characterized in that: comprise auxiliary power circuit, input electric capacity of voltage regulation, boost inductance, gated transistor, fly-wheel diode, first diode, control Driver Circuit, output electric capacity of voltage regulation, load and sample circuit, described input electric capacity of voltage regulation is connected on the photovoltaic generating system outward; One end of described boost inductance is connected with the positive pole of input electric capacity of voltage regulation, and the other end is connected with the collector of gated transistor; The grid of described gated transistor is connected with control Driver Circuit, and its emitter is connected with the negative pole of input electric capacity of voltage regulation; The anode of described fly-wheel diode is connected with the emitter of gated transistor, and its negative electrode is connected with the collector of gated transistor; The anode of described first diode is connected with the collector of gated transistor, and its negative electrode is connected with load; The positive pole of output electric capacity of voltage regulation is connected with the negative electrode of first diode, and its negative pole is connected with the anode of fly-wheel diode; Described load is connected with output electric capacity of voltage regulation, Acquisition Circuit respectively; Described Acquisition Circuit is connected with input electric capacity of voltage regulation, load, output electric capacity of voltage regulation, control Driver Circuit respectively.
2. the automatic voltage regulating circuit of solar photovoltaic generation system according to claim 1, it is characterized in that: described input electric capacity of voltage regulation comprises first electric capacity of voltage regulation and second electric capacity of voltage regulation, and first electric capacity of voltage regulation is in parallel with second electric capacity of voltage regulation; The anodal of the positive pole of first electric capacity of voltage regulation and second electric capacity of voltage regulation all is connected with an end of boost inductance; The negative pole of the negative pole of first electric capacity of voltage regulation and second electric capacity of voltage regulation all is connected with the emitter of gated transistor.
3. the automatic voltage regulating circuit of solar photovoltaic generation system according to claim 1, it is characterized in that: described control Driver Circuit comprises first triode, second triode, the 3rd triode, comparer, summing circuit, subtractor circuit, multiplier, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance and the 12 resistance, the grounded emitter of described first triode, its base stage is connected with comparer, and its collector is connected with the base stage of second triode; The base stage of second triode is connected with the base stage of the 3rd triode, and its emitter is connected with the collector of the 3rd triode, the grid of gated transistor respectively, and its collector is connected with an end of the 12 resistance; The other end of the 12 resistance is connected with the 11 resistance, auxiliary power circuit respectively; The base stage of the other end of the 11 resistance and second triode; The collector of the 3rd triode is connected with the grid of gated transistor, and its emitter is connected with auxiliary power circuit; The positive pole of described comparer is connected with summing circuit, and its negative pole is connected with Acquisition Circuit; A positive terminal of described summing circuit is connected with the 7th resistance, the 8th resistance respectively, and its another positive terminal is connected with subtractor circuit; The other end of the 7th resistance is connected with auxiliary power circuit, the other end ground connection of the 8th resistance; Described the 7th resistance, the 9th resistance, the tenth resistance connect successively, and the tenth resistance eutral grounding; One end of described subtractor circuit is connected between the 9th resistance and the tenth resistance, and the other end is connected with multiplier, and multiplier is connected with Acquisition Circuit.
4. the automatic voltage regulating circuit of solar photovoltaic generation system according to claim 3, it is characterized in that: described sample circuit comprises first resistance, second resistance, the 3rd resistance, the 4th resistance and current sensor, described first resistance is connected with second resistance, the other end of first resistance is connected between the positive pole and boost inductance of input electric capacity of voltage regulation, and the other end of second resistance is connected between the emitter of input negative pole of electric capacity of voltage regulation and gated transistor; Described the 3rd resistance is connected with the 4th resistance, and the other end of the 3rd resistance is connected with the positive pole of load, output electric capacity of voltage regulation, and the other end of the 4th resistance is connected with the negative pole of output electric capacity of voltage regulation; The positive pole of described current sensor is connected with load, and its negative pole is connected with the negative pole of output electric capacity of voltage regulation, and its test lead is connected with control Driver Circuit; Between described the 3rd resistance and the 4th resistance, be respectively equipped with output terminal between the 3rd resistance and the 4th resistance, described output terminal all is connected with control Driver Circuit.
5. the automatic voltage regulating circuit of solar photovoltaic generation system according to claim 4 is characterized in that: the test lead of described current sensor is connected with multiplier in the control Driver Circuit.
6. the automatic voltage regulating circuit of solar photovoltaic generation system according to claim 4 is characterized in that: be provided with output terminal between described first resistance and second resistance, described output terminal is connected with comparer in the control Driver Circuit; Be provided with output terminal between described the 3rd resistance and the 4th resistance, described output terminal is connected with multiplier in the control Driver Circuit.
7. the automatic voltage regulating circuit of solar photovoltaic generation system according to claim 1 is characterized in that: described input electric capacity of voltage regulation is connected on outward on the output terminal of solar panel of photovoltaic generating system.
8. the automatic voltage regulating circuit of solar photovoltaic generation system according to claim 1, it is characterized in that: described auxiliary power circuit comprises voltage stabilizing chip one, the 3rd electric capacity, the 4th electric capacity, the 4th diode, voltage stabilizing chip two, the 5th electric capacity, the 6th electric capacity, the 5th diode, voltage stabilizing chip three, the 7th electric capacity, the 5th resistance, the 6th resistance, the 8th electric capacity, the 6th diode, the 7th diode and the 9th electric capacity, described voltage stabilizing chip one comprises pin one, pin two and pin three, its pin one respectively with the input electric capacity of voltage regulation positive pole, the positive pole of the 3rd electric capacity connects, and its pin two is connected with the negative pole of the 3rd electric capacity; The two ends of the 4th electric capacity are connected with pin two, the pin three of voltage stabilizing chip one respectively; The negative electrode of described the 4th diode is connected with the pin three of voltage stabilizing chip one, and its anode is connected with the pin two of voltage stabilizing chip one; Pin two, the pin three of voltage stabilizing chip one are connected with control Driver Circuit respectively;
Described voltage stabilizing chip two comprises pin one, pin two and pin three, and its pin one is connected with the positive pole of input electric capacity of voltage regulation, the positive pole of the 5th electric capacity respectively, and its pin two is connected with the negative pole of the 5th electric capacity; The two ends of the 6th electric capacity are connected with pin two, the pin three of voltage stabilizing chip two respectively; The negative electrode of described the 4th diode is connected with the pin three of voltage stabilizing chip two, and its anode is connected with the pin two of voltage stabilizing chip two; The pin two of voltage stabilizing chip two is connected with control Driver Circuit respectively with pin three; The negative electrode of the 5th diode is connected with the pin three of voltage stabilizing chip two, and its anode is connected with the pin two of voltage stabilizing chip two;
Described voltage stabilizing chip three comprises pin one, pin two and pin three, and its pin one is connected with the positive pole of input electric capacity of voltage regulation, the positive pole of the 7th electric capacity respectively, and its pin two is connected with the 5th resistance, and the other end of the 5th resistance is connected with the negative pole of the 7th electric capacity; One end of the 8th electric capacity is connected with the negative pole of the 7th electric capacity, and the other end is connected with the anode of the 6th resistance, the 7th diode; The negative electrode of the other end of the 6th resistance, the 7th diode all is connected with the pin three of voltage stabilizing chip three; The negative electrode of the 6th diode is connected with pin one, and its anode is connected with pin three; Described pin three is connected with control Driver Circuit; One end of described the 9th electric capacity and the negative pole of the 7th electric capacity, the other end is connected with control Driver Circuit; The negative pole of the 7th electric capacity is connected with control Driver Circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010205858798U CN201876750U (en) | 2010-10-28 | 2010-10-28 | Automatic voltage regulation circuit of solar photovoltaic power generation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010205858798U CN201876750U (en) | 2010-10-28 | 2010-10-28 | Automatic voltage regulation circuit of solar photovoltaic power generation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102081419A (en) * | 2010-10-28 | 2011-06-01 | 华南理工大学 | Automatic voltage regulating circuit and method for solar photovoltaic power generation system |
| CN107276199A (en) * | 2016-04-08 | 2017-10-20 | 上海新微技术研发中心有限公司 | Solar charging device and charging method using solar cell |
-
2010
- 2010-10-28 CN CN2010205858798U patent/CN201876750U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102081419A (en) * | 2010-10-28 | 2011-06-01 | 华南理工大学 | Automatic voltage regulating circuit and method for solar photovoltaic power generation system |
| CN102081419B (en) * | 2010-10-28 | 2013-06-12 | 华南理工大学 | Automatic voltage regulating circuit and method for solar photovoltaic power generation system |
| CN107276199A (en) * | 2016-04-08 | 2017-10-20 | 上海新微技术研发中心有限公司 | Solar charging device and charging method using solar cell |
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