CN108964609A - A kind of solar battery array simulator - Google Patents
A kind of solar battery array simulator Download PDFInfo
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- CN108964609A CN108964609A CN201810973964.2A CN201810973964A CN108964609A CN 108964609 A CN108964609 A CN 108964609A CN 201810973964 A CN201810973964 A CN 201810973964A CN 108964609 A CN108964609 A CN 108964609A
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- solar battery
- battery array
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- 230000009467 reduction Effects 0.000 claims abstract description 45
- 230000035939 shock Effects 0.000 claims abstract description 26
- 238000004146 energy storage Methods 0.000 claims abstract description 12
- 230000005611 electricity Effects 0.000 claims description 20
- 239000003990 capacitor Substances 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 13
- 238000002955 isolation Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 28
- 230000006837 decompression Effects 0.000 description 8
- 238000004088 simulation Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 101100489713 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) GND1 gene Proteins 0.000 description 1
- 101100489717 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) GND2 gene Proteins 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of solar battery array simulators, including rectifier bridge, DC-DC reduction voltage circuit, load, voltage and current Acquisition Circuit, controller and driving circuit.DC-DC reduction voltage circuit includes normal shock transformer, cuts negative peak diode, switching tube, buffer circuit, first diode, the second diode and energy storage filter inductance.Controller is used for the on-off using driving circuit control switch pipe, to realize the output voltage of closed loop controlled buck control DC-DC reduction voltage circuit.As it can be seen that DC-DC reduction voltage circuit realizes the isolation of high pressure and low pressure using normal shock transformer, to reduce the degree of danger in experimentation, while the carrying load ability of itself is improved；And just can control the underpressure of normal shock transformer only with a switching tube, to facilitate circuit modulated process；In addition, the buffer circuit that DC-DC reduction voltage circuit includes current spike voltage where absorbing extends the service life of switching tube to protect switching tube.
Description
Technical field
The present invention relates to power domains, more particularly to a kind of solar battery array simulator.
Background technique
Currently, solar battery array simulator is mainly used for the experiment of photovoltaic power generation special inverter, solar array
Column simulator is using actual circuit come the output characteristics of analog solar cell array, the i.e. output characteristics of actual circuit and institute
The solar battery array of simulation is consistent, it is therefore an objective to carry out the alternative solar battery array of solar battery array simulator
Experiment.Fig. 1 is please referred to, Fig. 1 is a kind of structural schematic diagram of solar battery array simulator in the prior art.The prior art
In, the DC-DC reduction voltage circuit of solar battery array simulator mostly uses BUCK reduction voltage circuit or Full-Bridge Buck circuit.But
It is that the isolation of high pressure and low pressure is not implemented in BUCK reduction voltage circuit, leads in experimentation that there are certain risk and bringing onto loads
Ability is lower；And though Full-Bridge Buck circuit realizes the isolation of high pressure and low pressure, concatenated switching tube not altogether, leads to electricity thereon
Road modulation is more difficult.
Therefore, how to provide a kind of scheme of solution above-mentioned technical problem is that those skilled in the art needs to solve at present
The problem of.
Summary of the invention
The object of the present invention is to provide a kind of solar battery array simulator, DC-DC reduction voltage circuit therein is used
Normal shock transformer, it can be achieved that high pressure and low pressure isolation, to reduce the degree of danger in experimentation, at the same improve from
The carrying load ability of body；Moreover, DC-DC reduction voltage circuit just can control the decompression journey of normal shock transformer only with a switching tube
Degree, to facilitate entire circuit modulated process；In addition, DC-DC reduction voltage circuit includes buffer circuit, to protect switch
Pipe, extends the service life of switching tube.
In order to solve the above technical problems, the present invention provides a kind of solar battery array simulator, including rectifier bridge,
DC-DC reduction voltage circuit, load, voltage and current Acquisition Circuit, controller and driving circuit, which is characterized in that the DC-DC decompression
Circuit include normal shock transformer, cut negative peak diode, switching tube, for circuit where absorbing peak voltage buffer circuit,
First diode, the second diode and energy storage filter inductance, the normal shock transformer include resetting coil, primary coil and secondary
Coil；Wherein:
The first end of the resetting coil respectively with the rectifier bridge input anode and the primary coil first end
Connection, the second end of the resetting coil are connect with the cathode for cutting negative peak diode, the anode for cutting negative peak diode
It is connect respectively with the first end of the input negative terminal of the rectifier bridge, the first end of the switching tube and the buffer circuit, it is public
Terminate the first ground altogether, the second end of the switching tube respectively with the second end of the buffer circuit and the primary coil second
End connection, the control terminal of the switching tube are connect with the output end of the driving circuit, the first end of the secondary coil and institute
State first diode anode connection, the cathode of the first diode respectively with the cathode of second diode and the storage
The first end connection of energy filter inductance, the second end of the energy storage filter inductance are connect with the first end of the load, and described time
The second end of grade coil is connect with the second end of the anode of second diode and the load respectively, public termination second
Ground；
The controller is used to control the on-off of the switching tube using the driving circuit, to realize closed loop controlled buck control
The output voltage of the DC-DC reduction voltage circuit.
Preferably, the buffer circuit includes third diode, first resistor, second resistance and first capacitor；Wherein:
The cathode of the third diode first end with the first end of the first resistor and the second resistance respectively
Connection, first end of the common end as the buffer circuit, the anode of the third diode respectively with the first resistor
Second end, the connection of the first end of the second end of the second resistance and the first capacitor, the second end of the first capacitor
Second end as the buffer circuit.
Preferably, the DC-DC reduction voltage circuit further includes 3rd resistor, in which:
The first end of the 3rd resistor respectively with the input negative terminal of the rectifier bridge, the sun for cutting negative peak diode
The first end of pole, the first end of the switching tube and the buffer circuit connects, public the first ground of termination, the 3rd resistor
Second end connect respectively with the output end of the control terminal of the switching tube and the driving circuit.
Preferably, which further includes EMI power-supply filter, in which:
The input terminal of the EMI power-supply filter and the output end of AC power source connect, the EMI power-supply filter it is defeated
Outlet is connect with the input terminal of the rectifier bridge, dry for filtering out electromagnetism contained in the electric signal of the AC power source output
It disturbs.
Preferably, the switching tube is specially NMOS tube, control terminal of the grid of the NMOS tube as the switching tube,
First end of the source electrode of the NMOS tube as the switching tube, second to drain as the switching tube of the NMOS tube
End.
Preferably, the controller is specially STM32 series monolithic.
Preferably, the solar battery array simulator further include:
The host computer being connect with the controller, for executing the calculating operation of the controller, to reduce the control
The power loss of device.
Preferably, the host computer is also used to show the output of simulated solar battery array using itself display
Characteristic curve.
The present invention provides a kind of solar battery array simulators, including rectifier bridge, DC-DC reduction voltage circuit, load, electricity
Current voltage Acquisition Circuit, controller and driving circuit, DC-DC reduction voltage circuit include normal shock transformer, cut negative peak diode, switch
Pipe, for absorbs place circuit peak voltage buffer circuit, first diode, the second diode and energy storage filter inductance,
Normal shock transformer includes resetting coil, primary coil and secondary coil.Controller is used to utilize driving circuit control switch pipe
On-off, to realize the output voltage of closed loop controlled buck control DC-DC reduction voltage circuit.
As it can be seen that the DC-DC reduction voltage circuit of the application uses normal shock transformer, normal shock transformer can realize high pressure and low pressure
Isolation, to reduce the degree of danger in experimentation, while improving the carrying load ability of itself；Moreover, the application
DC-DC reduction voltage circuit just can control the underpressure of normal shock transformer only with a switching tube, to facilitate entire electricity
Road modulated process；In addition, the DC-DC reduction voltage circuit of the application includes the buffering electricity for the peak voltage of circuit where absorbing
Road to protect switching tube, and then extends the service life of switching tube.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of solar battery array simulator in the prior art；
Fig. 2 is a kind of structural schematic diagram of solar battery array simulator provided by the invention；
Fig. 3 is a kind of structural schematic diagram of rectifier bridge as shown in Figure 2 provided by the invention；
Fig. 4 (1) is a kind of structural schematic diagram of voltage collection circuit as shown in Figure 2 provided by the invention；
Fig. 4 (2) is a kind of structural schematic diagram of current collection circuit as shown in Figure 2 provided by the invention；
Fig. 5 is a kind of structural schematic diagram of controller as shown in Figure 2 provided by the invention；
Fig. 6 is a kind of structural schematic diagram of driving circuit as shown in Figure 2 provided by the invention；
Fig. 7 is the structural schematic diagram that a kind of program provided by the invention downloads debug circuit；
Fig. 8 is a kind of structural schematic diagram of the telecommunication circuit between controller and host computer provided by the invention；
Fig. 9 is the structural schematic diagram of another kind DC-DC reduction voltage circuit provided by the invention；
Figure 10 is a kind of structural schematic diagram of EMI filter circuit provided by the invention；
Figure 11 is a kind of corresponding U-I characteristic curve of solar battery array simulator provided by the invention and solar-electricity
The characteristic comparison diagram of the practical U-I in pond；
Figure 12 is a kind of corresponding U-P characteristic curve of solar battery array simulator provided by the invention and solar-electricity
The characteristic comparison diagram of the practical U-P in pond.
Specific embodiment
Core of the invention is to provide a kind of solar battery array simulator, and DC-DC reduction voltage circuit therein uses
Normal shock transformer, it can be achieved that high pressure and low pressure isolation, to reduce the degree of danger in experimentation, at the same improve from
The carrying load ability of body；Moreover, DC-DC reduction voltage circuit just can control the decompression journey of normal shock transformer only with a switching tube
Degree, to facilitate entire circuit modulated process；In addition, DC-DC reduction voltage circuit includes buffer circuit, to protect switch
Pipe, extends the service life of switching tube.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to figure 2., Fig. 2 is a kind of structural schematic diagram of solar battery array simulator provided by the invention.
The solar battery array simulator includes: rectifier bridge, DC-DC reduction voltage circuit, load, voltage and current acquisition electricity
Road, controller and driving circuit, DC-DC reduction voltage circuit include normal shock transformer T, cut negative peak diode D, switching tube Q, for inhaling
Buffer circuit SC, first diode D1, the second diode D2 and the energy storage filter inductance L of the peak voltage of circuit where receiving, just
Violent change depressor T includes resetting coil N1, primary coil N2 and secondary coil N3；Wherein:
The first end of resetting coil N1 is connect with the first end of the input anode of rectifier bridge and primary coil N2 respectively, is resetted
The second end of coil N1 is connect with the cathode for cutting negative peak diode D, cut the anode of negative peak diode D respectively with the input of rectifier bridge
The first end of negative terminal, the first end of switching tube Q and buffer circuit SC connects, public the first ground of termination, the second end of switching tube Q
It is connect respectively with the second end of the second end of buffer circuit SC and primary coil N2, the control terminal of switching tube Q and driving circuit
Output end connection, the first end of secondary coil N3 are connect with the anode of first diode D1, the cathode difference of first diode D1
It is connect with the first end of the cathode of the second diode D2 and energy storage filter inductance L, second end and the load of energy storage filter inductance L
First end connection, the second end of secondary coil N3 are connect with the second end of the anode of the second diode D2 and load respectively, public
The second ground is terminated altogether；
Controller is used for the on-off using driving circuit control switch pipe Q, to realize closed loop controlled buck control DC-DC decompression electricity
The output voltage on road.
Specifically, the solar battery array simulator of the application includes rectifier bridge, DC-DC reduction voltage circuit, load, voltage
Current collection circuit, controller and driving circuit, its working principle is that:
The 220V alternating current that AC power source exports is changed into direct current by rectifier bridge, and referring to figure 3., Fig. 3 mentions for the present invention
A kind of structural schematic diagram of the rectifier bridge as shown in Figure 2 supplied.The direct current that rectifier bridge changes is depressured by DC-DC reduction voltage circuit
Processing, the direct current after decompression can be load supplying.As shown in Fig. 2, DC-DC reduction voltage circuit includes normal shock transformer T, cuts negative peak
Diode D, switching tube Q, buffer circuit SC, first diode D1, the second diode D2 and energy storage filter inductance L.Wherein, normal shock
Transformer T realizes the electrical isolation between high-pressure side and low-pressure side using electromagnetic induction principle, to reduce in experimentation
Degree of danger, while improving itself carrying load ability.Buffer circuit SC is the switch poor for overcurrent-overvoltage ability
The peak voltage of the safeguard measure that pipe Q takes, absorbable place circuit extends switching tube Q to protect switching tube Q
Service life.Cutting negative peak diode D is equally not breakdown the taken safeguard measure of protective switch pipe Q.
It should be noted that high-pressure section (i.e. circuit before DC-DC conversion) be grounded position of DC-DC reduction voltage circuit is
First ground (indicates) with GND1, and the be grounded position of the low-pressure section of DC-DC reduction voltage circuit (i.e. DC-DC convert after circuit) is
Two ground (indicate) with GND2, and the two is not altogether.
Further, the decompression principle of DC-DC reduction voltage circuit are as follows: the 1) simulation of solar battery array simulator is the sun
The voltage and current output characteristics of energy cell array, so controller sets the given output voltage of solar battery array in advance
And it (sets the given voltage of load to electricity output electric current and to constant current, storage volt-ampere characteristic curve can be passed through
Mode voltage and current given value is set).
2) when solar battery array simulator is tested, voltage and current Acquisition Circuit acquires the reality of load in real time
Voltage and actual current, and the voltage acquisition value of load and current acquisition value are contracted to the acquisition range of controller.
3) controller is corresponding to seek voltage x current actual value and electricity after the virtual voltage and actual current for collecting load
Error between current voltage given value.When load voltage is there are when error, controller adjusts DC-DC decompression electricity by driving circuit
The driving signal of switching tube Q in road, to utilize the underpressure of the on-off of switching tube Q variation adjustment normal shock transformer T, Jin Ergai
The virtual voltage of varying load, finally make load virtual voltage as far as possible close to load given voltage, that is, reduce both error by
Gradually to zero.After the good load voltage of controller closed-loop control, if there are errors for load current at this time, by adjusting load
The control of resistance value realization load current.
Here load may include a fixed resistance and a slide rheostat, and voltage and current Acquisition Circuit may include electricity
Press Acquisition Circuit and current collection circuit.Based on this, (1) and Fig. 4 (2), Fig. 4 (1) are one kind provided by the invention referring to figure 4.
The structural schematic diagram of voltage collection circuit as shown in Figure 2；Fig. 4 (2) is a kind of current acquisition electricity as shown in Figure 2 provided by the invention
The structural schematic diagram on road.
In Fig. 4 (1), voltage collection circuit is using operational amplifier (selection is LM258) to collected load voltage
It is reduced, to be contracted to the voltage acquisition range of controller.Wherein, the minification of operational amplifier is by its input resistance
Rin and feedback resistance Rf are determined, as specific minification, according to the actual situation depending on.In Fig. 4 (2), current collection circuit
It is similar with voltage collection circuit principle, equally collected load current is carried out using operational amplifier (selection is OP07)
It reduces, to be contracted to the current acquisition range of controller.
For example, controller here selects STM32 series monolithic, it is known that STM32 series monolithic highest is collectable
Voltage is 3.3v, if the maximum output voltage of the solar battery array simulator of the application is designed as 50V, voltage acquisition electricity
Operational amplifier in road need to reduce collected load voltage, and minification is 50/3rds, in order to STM32
Series monolithic acquisition.
Referring to figure 5., Fig. 5 is a kind of structural schematic diagram of controller as shown in Figure 2 provided by the invention.STM32 series
Single-chip microcontroller can specifically use STM32F103RCT6 main control chip, be realized by the 22 of main control chip, 23 pins to voltage and current
Acquisition.In addition, 26 pins output PWM (Pulse Width Modulation, pulse width modulation) wave of main control chip, i.e.,
Control the control signal of switching tube Q on-off in DC-DC reduction voltage circuit.
Due to main control chip generate PWM wave undertension with the on-off of driving switch pipe Q, so need to connect one it is right
The driving circuit of its PWM wave generated amplification, to realize the function of driving switch pipe Q on-off.For example, please referring to Fig. 6, Fig. 6 is
A kind of structural schematic diagram of driving circuit as shown in Figure 2 provided by the invention.Driving circuit in Fig. 6 is specially isolation drive electricity
Road, using TLP250 light-coupled isolation driving chip, wherein the PWM wave that 2 pins input main control chip generates, 8 pins meet 12V
Voltage；6,7 pins are the output pin of light-coupled isolation driving chip, and the waveform of the two output is consistent with the waveform that 2 pins input,
But the voltage of output waveform is equal to the connect voltage of 8 pins, thus play the role of amplifying the PWM wave that main control chip generates, into
And make amplified PWM wave that can realize the function of driving switch pipe Q on-off.
It is understood that the duty ratio for the PWM wave that the control terminal of switching tube Q inputs is bigger, normal shock transformer T's is averaged
Output voltage is bigger.In the case where switching tube Q on-off, first diode D1 and the second diode D2 alternately pass through electric current, are
Load supplying.
In addition, the power supply of controller, voltage and current Acquisition Circuit and driving circuit is not in solar battery array simulator
It can directly be provided by 220V alternating current, so needing auxiliary circuit to provide.For the electricity of Fig. 4 (1), Fig. 4 (2), Fig. 5 and Fig. 6
Line structure, it is desirable to provide the voltage of+12V ,+5V ,+3.3V and -5V.The application mainly cooperates flyback using decompression chip LD7575
220V alternating current is converted to+12V DC electricity by topology.After acquisition+12V DC electricity, the voltage of+5V ,+3.3V and -5V are only needed
It is converted using a voltage conversion chip.
Other than foregoing circuit, the application please refers to Fig. 7 and Fig. 8 there are also some basic circuits for controller work, schemes
7 download the structural schematic diagram of debug circuit for a kind of program provided by the invention, Fig. 8 be a kind of controller provided by the invention and
The structural schematic diagram of telecommunication circuit between host computer.In Fig. 7, program download debug circuit respectively with Program download (such as J-
Link, ST-Link etc.) it is connected with controller, it is mainly used for the downloading and on-line monitoring debugging of director demon.In Fig. 8,
The combination of CH340G and MINIUSB is mainly used for realizing the communication between controller and host computer, to make host computer to communication
Data are acquired, handle, show and analyze.
The present invention provides a kind of solar battery array simulators, including rectifier bridge, DC-DC reduction voltage circuit, load, electricity
Current voltage Acquisition Circuit, controller and driving circuit, DC-DC reduction voltage circuit include normal shock transformer, cut negative peak diode, switch
Pipe, for absorbs place circuit peak voltage buffer circuit, first diode, the second diode and energy storage filter inductance,
Normal shock transformer includes resetting coil, primary coil and secondary coil.Controller is used to utilize driving circuit control switch pipe
On-off, to realize the output voltage of closed loop controlled buck control DC-DC reduction voltage circuit.
As it can be seen that the DC-DC reduction voltage circuit of the application uses normal shock transformer, normal shock transformer can realize high pressure and low pressure
Isolation, to reduce the degree of danger in experimentation, while improving the carrying load ability of itself；Moreover, the application
DC-DC reduction voltage circuit just can control the underpressure of normal shock transformer only with a switching tube, to facilitate entire electricity
Road modulated process；In addition, the DC-DC reduction voltage circuit of the application includes the buffering electricity for the peak voltage of circuit where absorbing
Road to protect switching tube, and then extends the service life of switching tube.
On the basis of the above embodiments:
Fig. 9 is please referred to, Fig. 9 is the structural schematic diagram of another kind DC-DC reduction voltage circuit provided by the invention.
As a kind of preferred embodiment, buffer circuit SC includes third diode D3, first resistor R1, second resistance R2
And first capacitor C1；Wherein:
The cathode of third diode D3 is connect with the first end of the first end of first resistor R1 and second resistance R2 respectively,
First end of the common end as buffer circuit SC, the anode of third diode D3 respectively with the second end of first resistor R1, second
The second end of resistance R2 and the connection of the first end of first capacitor C1, the second end of first capacitor C1 as buffer circuit SC second
End.
Specifically, in order to which the voltage build-up rate of circuit where limit switch pipe Q is excessive, it is ensured that the safe operation of switching tube Q,
In the both ends parallel connection buffer circuit SC of switching tube Q.In Fig. 7, buffer circuit SC includes third diode D3, first resistor R1,
Two resistance R2 and first capacitor C1, its working principle is that: it is limited using the characteristic that the voltage at the both ends first capacitor C1 cannot be mutated
Voltage build-up rate processed.And first capacitor C1 series connection first resistor R1 and second resistance R2 can prevent rlc circuit in transient process,
The voltage at the both ends first capacitor C1 is excessive and damages thyristor.
As a kind of preferred embodiment, DC-DC reduction voltage circuit further includes 3rd resistor R3, in which:
The first end of 3rd resistor R3 respectively with the input negative terminal of rectifier bridge, the anode for cutting negative peak diode D, switching tube Q
First end and buffer circuit SC first end connection, public the first ground of termination, the second end of 3rd resistor R3 respectively with open
The control terminal for closing pipe Q is connected with the output end of driving circuit.
Further, the application adds a 3rd resistor R3 in the control terminal of switching tube Q, is hit with reducing switching tube Q
The risk worn extends the service life of switching tube Q to further protect switching tube Q.
As a kind of preferred embodiment, which further includes EMI filter circuit, in which:
The input terminal of EMI filter circuit and the output end of AC power source connect, the output end and rectifier bridge of EMI filter circuit
Input terminal connection, for filter out AC power source output electric signal contained in electromagnetic interference.
Further, the solar battery array simulator of the application also added EMI in ac input end
(Electromagnetic Interference, electromagnetic interference) filter circuit, for filtering out the electric signal of AC power source output
Contained in electromagnetic interference, to stabilize the ac input signal of solar battery array simulator, and then improve the sun
The stability and reliability of energy cell array simulator entirety.Figure 10 is please referred to, Figure 10 is a kind of EMI filtering provided by the invention
The structural schematic diagram of circuit.
As a kind of preferred embodiment, switching tube Q is specially NMOS tube, control of the grid of NMOS tube as switching tube Q
End processed, first end of the source electrode of NMOS tube as switching tube Q, second end of the drain electrode of NMOS tube as switching tube Q.
Specifically, the switching tube Q of the application can be selected but be not limited only to NMOS tube, and the application does not do special limit herein
It is fixed.
As a kind of preferred embodiment, controller is specially STM32 series monolithic.
Specifically, the controller of the application can be selected but be not limited only to STM32 series monolithic, and the application is not spy herein
Other restriction.
As a kind of preferred embodiment, the solar battery array simulator further include:
Host computer connected to the controller, for executing the calculating operation of controller, to reduce the power loss of controller.
Further, it is contemplated that the controller of the application is during closed-loop control, due to undertaking more calculating behaviour
Work causes its power loss larger, so, the solar battery array simulator of the application also added host computer, control at this time
Calculating task can be met at host computer execution by device, and host computer is back to controller after having executed calculating task, by calculated result
, to reduce the power loss of controller.
As a kind of preferred embodiment, host computer is also used to the solar array using the display simulation of itself display
The output characteristic curve of column.
Further, in existing solar battery array simulator, the usually included liquid crystal display of controller, Ke Yixian
The output characteristic curve for showing the solar battery array of solar battery array simulator simulation, is watched for staff.But
The interface clarity that the included liquid crystal display of controller is shown is lower, influences the viewing effect of staff.It considers simultaneously
The interface clarity that the included display of host computer is shown is higher, so, the display that the application also utilizes host computer included is aobvious
Show the output characteristic curve of the solar battery array of solar battery array simulator simulation, to improve the viewing of staff
Effect.
Here the output characteristic curve that the included display of host computer is shown is that solar battery array simulator is corresponding
Simulation feature curve, if its difference between the reality output characteristic curve for the solar battery array simulated is allowing
In error range, then it is assumed that simulate successfully；Otherwise it is assumed that simulation failure.In addition, the display that the host computer of the application carries is also
The communication data that can show analog result (success or failure) and host computer and controller is watched for staff.
In addition, please referring to Figure 11 and Figure 12, Figure 11 is that a kind of solar battery array simulator provided by the invention is corresponding
U-I characteristic curve and the characteristic comparison diagram of the practical U-I of solar battery, Figure 12 be a kind of solar energy provided by the invention
The corresponding U-P characteristic curve of cell array simulator and the characteristic comparison diagram of the practical U-P of solar battery.Figure 11 and Figure 12
It is comparison diagram made by the solar battery array simulator based on the application design, can be seen that mould by two comparison diagrams
Quasi- data and gross data be it is substantially identical, illustrate that the solar battery array simulator of the application can be working properly.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (8)
1. a kind of solar battery array simulator, including rectifier bridge, DC-DC reduction voltage circuit, load, voltage and current acquisition electricity
Road, controller and driving circuit, which is characterized in that the DC-DC reduction voltage circuit include normal shock transformer, cut negative peak diode,
Switching tube, for circuit where absorbing peak voltage buffer circuit, first diode, the second diode and energy storage filtered electrical
Sense, the normal shock transformer includes resetting coil, primary coil and secondary coil；Wherein:
The first end of the resetting coil is connect with the first end of the input anode of the rectifier bridge and the primary coil respectively,
The second end of the resetting coil is connect with the cathode for cutting negative peak diode, the anode for cutting negative peak diode respectively with
The first end of the input negative terminal of the rectifier bridge, the first end of the switching tube and the buffer circuit connects, public termination
First ground, the second end of the switching tube connect with the second end of the buffer circuit and the second end of the primary coil respectively
It connects, the control terminal of the switching tube is connect with the output end of the driving circuit, the first end of the secondary coil and described the
The anode of one diode connects, and the cathode of the first diode is filtered with the cathode of second diode and the energy storage respectively
The first end of wave inductance connects, and the second end of the energy storage filter inductance is connect with the first end of the load, the secondary wire
The second end of circle is connect with the second end of the anode of second diode and the load respectively, public the second ground of termination；
The controller is used to control the on-off of the switching tube using the driving circuit, to realize described in closed loop controlled buck control
The output voltage of DC-DC reduction voltage circuit.
2. solar battery array simulator as described in claim 1, which is characterized in that the buffer circuit includes the three or two
Pole pipe, first resistor, second resistance and first capacitor；Wherein:
The cathode of the third diode is connect with the first end of the first end of the first resistor and the second resistance respectively,
First end of its common end as the buffer circuit, the anode of the third diode respectively with the first resistor second
The first end connection at end, the second end of the second resistance and the first capacitor, the second end of the first capacitor is as institute
State the second end of buffer circuit.
3. solar battery array simulator as described in claim 1, which is characterized in that the DC-DC reduction voltage circuit also wraps
Include 3rd resistor, in which:
The first end of the 3rd resistor respectively with the input negative terminal of the rectifier bridge, the anode for cutting negative peak diode, institute
State the first end of switching tube and the first end connection of the buffer circuit, public the first ground of termination, the of the 3rd resistor
Two ends are connect with the output end of the control terminal of the switching tube and the driving circuit respectively.
4. solar battery array simulator as claimed in claim 3, which is characterized in that the solar battery array simulator
It further include EMI power-supply filter, in which:
The input terminal of the EMI power-supply filter and the output end of AC power source connect, the output end of the EMI power-supply filter
It is connect with the input terminal of the rectifier bridge, for filtering out electromagnetic interference contained in the electric signal of the AC power source output.
5. solar battery array simulator as claimed in claim 4, which is characterized in that the switching tube is specially NMOS
Pipe, control terminal of the grid of the NMOS tube as the switching tube, the source electrode of the NMOS tube as the switching tube the
One end, second end of the drain electrode of the NMOS tube as the switching tube.
6. solar battery array simulator as claimed in claim 4, which is characterized in that the controller is specially STM32
Series monolithic.
7. solar battery array simulator as claimed in any one of claims 1 to 6, which is characterized in that the solar array
Column simulator further include:
The host computer being connect with the controller, for executing the calculating operation of the controller, to reduce the controller
Power loss.
8. solar battery array simulator as claimed in claim 7, which is characterized in that the host computer is also used to using certainly
Body display shows the output characteristic curve of simulated solar battery array.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810973964.2A CN108964609A (en) | 2018-08-24 | 2018-08-24 | A kind of solar battery array simulator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810973964.2A CN108964609A (en) | 2018-08-24 | 2018-08-24 | A kind of solar battery array simulator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111701141A (en) * | 2020-06-08 | 2020-09-25 | 河南翔宇医疗设备股份有限公司 | Electrotherapy integrated circuit |
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| CN206211844U (en) * | 2016-12-06 | 2017-05-31 | 安徽工程大学 | The new two-way DC/DC converters of crisscross parallel |
| CN106877665A (en) * | 2015-12-13 | 2017-06-20 | 李福来 | The program control DC/DC power supplys of voltage-dropping type based on UC3843 |
| CN207039460U (en) * | 2017-07-17 | 2018-02-23 | 华南理工大学 | A kind of double tube positive exciting type Z sources DC voltage converter |
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| CN104410363A (en) * | 2014-12-03 | 2015-03-11 | 黄河科技学院 | Solar battery simulator |
| CN106877665A (en) * | 2015-12-13 | 2017-06-20 | 李福来 | The program control DC/DC power supplys of voltage-dropping type based on UC3843 |
| CN106300925A (en) * | 2016-08-26 | 2017-01-04 | 杰华特微电子（杭州）有限公司 | Driving control circuit, method and the system thereof of AC DC circuit |
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Application publication date: 20181207 |