CN110854985B - Maximum power independent power supply system based on DSP - Google Patents
Maximum power independent power supply system based on DSP Download PDFInfo
- Publication number
- CN110854985B CN110854985B CN201911094315.6A CN201911094315A CN110854985B CN 110854985 B CN110854985 B CN 110854985B CN 201911094315 A CN201911094315 A CN 201911094315A CN 110854985 B CN110854985 B CN 110854985B
- Authority
- CN
- China
- Prior art keywords
- current
- diode
- voltage
- switch tube
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- 238000004146 energy storage Methods 0.000 claims abstract description 17
- 230000005611 electricity Effects 0.000 claims abstract description 7
- 230000001965 increasing effect Effects 0.000 claims abstract description 5
- 238000005070 sampling Methods 0.000 claims description 21
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims description 18
- 238000013016 damping Methods 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 12
- 230000001939 inductive effect Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 7
- 230000010355 oscillation Effects 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 238000005286 illumination Methods 0.000 claims description 4
- 230000002401 inhibitory effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 9
- 230000008859 change Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/66—Regulating electric power
- G05F1/67—Regulating electric power to the maximum power available from a generator, e.g. from solar cell
-
- 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
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
-
- 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
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The invention discloses a maximum power independent power supply system based on a DSP (digital signal processor), which comprises a DCDC (direct current-direct current) conversion circuit, a power switch tube, a diode, a capacitor and a load resistor, wherein the DCDC conversion circuit consists of an energy storage inductor, a power switch tube, a diode, a capacitor and a load resistor; the power switch tube is provided with a collector electrode coupled with the output end of the energy storage inductor and an emitter electrode coupled with the negative end of the voltage; the capacitor is connected with the conduction end of the diode in series and is connected with the load resistor in parallel; after a power switch tube of the DCDC conversion circuit is conducted, the voltage of a power supply is added to an energy storage inductor, the current of the inductor is linearly increased, a diode is cut off, and a load is provided by a capacitor; maintaining the load resistor to work continuously, and arranging an anti-reverse charging diode between the DCDC conversion circuit and the storage battery pack; when the electricity generated by the solar cell can not meet the load requirement, the storage battery pack discharges to the load, and when the storage battery pack discharges, the anti-reverse charging diode is conducted in the forward direction and is cut off in the reverse direction.
Description
Technical Field
The invention relates to the technical field of power supply, in particular to a maximum power independent power supply system based on a DSP.
Background
The solar power supply system is mainly applied to solar street lamps, solar clocks, solar lawn lamps, solar fountains, solar urban landscapes, solar advertising lamp boxes, solar batteries, solar electric vehicles and the like; solar power generation is widely considered as the preferred renewable clean energy source for reasons including: the solar energy is discharged without polluting gas or impurities in the process of supplying power to the storage battery; solar energy power supply can both set up equipment in each area, need not be for the long distance transmission distribution power transmission and vexation, has saved the input of manpower and materials greatly, application number: 201811559216.6, the current generated by the solar panel sequentially passes through the positive plate group, the circulating group and the negative plate group to charge the storage battery; when the circuit is broken, the corresponding diode is reversely broken down, so that the broken area is conducted, and the whole power supply system can still work;
in mountainous areas and other places in remote areas, due to the fact that the land is wide and people are few, but in places needing electricity, due to the fact that the electricity consumption requirements of the places are too few, if the places directly use a power grid to transmit electricity, photoelectric conversion efficiency is low, power cannot be output at the maximum power, power supply loss is large, the requirements of users cannot be met, and based on the existing technical conditions, the prior art is urgently needed to be reformed.
Disclosure of Invention
The invention overcomes the problems that the existing photoelectric conversion efficiency is low and the power can not be output and supplied by the maximum power, and provides a maximum power independent power supply system based on DSP.
In some optional embodiments, to solve the above technical problem, the following technical solutions are adopted in the present invention:
a maximum power independent power supply system based on a DSP, comprising:
the DCDC conversion circuit comprises an energy storage inductor, a power switch tube, a diode, a capacitor and a load resistor, wherein the power switch tube is provided with a collector electrode coupled with the output end of the energy storage inductor and an emitter electrode coupled with the negative end of a voltage, the capacitor is connected with the conducting end of the diode in series and is connected with the load resistor in parallel,
the DCDC conversion circuit has the functions of converting the output voltage and current into the voltage and current required by a load (or a storage battery pack) in the whole system, and because the output of the solar panel array is nonlinear and is easily influenced by external factors, the output electric energy cannot be directly connected with the storage battery pack, and the DCDC conversion circuit is required to be added between the solar panel array and the storage battery pack to convert the electric energy into the electric energy required by the operation of the storage battery pack;
after a power switch tube of the DCDC conversion circuit is conducted, the voltage of a power supply is added to an energy storage inductor L, the inductive current is linearly increased, a diode is cut off, and a load is provided by a capacitor C; when the power switch tube is turned off, the inductive current flows to the output side through the diode D, the energy storage of the power supply and the energy storage inductor is transferred to the load and the capacitor C, the capacitor C is charged, and the load resistor is maintained to work continuously;
in the process of replacing the power switch tube with the diode, when the power switch tube S is conducted, the current passing through the power switch tube is i; when the switching tube S is turned off, the current passing through the diode D is also i, and the boost inductor current can be obtained by superimposing the two currents i. When the circuit works in a steady state, the charge quantity and the discharge quantity of the capacitor C are equal, so that the average current flowing through the capacitor C is 0; the average value of the current through the diode D is the load current. And the increase of the inductive current during the conduction period of the power switch tube S is equal to the decrease of the inductive current during the cut-off period of the power switch tube S;
the storage battery pack is used for rapidly storing the electric quantity generated by the system, and when the power supply device cannot meet the power supply of the load, the storage battery pack discharges the load, so that the load can continue to work normally;
an anti-reverse charging diode is arranged between the DCDC conversion circuit and the storage battery pack, and when the electricity generated by the solar battery cannot meet the load requirement in rainy days and poor illumination, the storage battery pack is required to discharge the load; when the storage battery pack discharges, the anti-reverse-charging diode is conducted in the forward direction and cut off in the reverse direction, can bear enough current, is small in forward voltage drop and reverse saturation current, and effectively prevents the storage battery pack from discharging the solar panel array;
a measurement module comprising:
the system comprises a voltage regulator, a driving circuit, a sampling circuit, a DSP controller and a display screen, wherein the voltage regulator, the driving circuit, the sampling circuit, the DSP controller and the display screen are used for sampling and storing output voltage and current of the system, processing signals and then putting the signals into a processing unit of the DSP controller, outputting the signals and adjusting duty ratio in the DCDC, controlling the output voltage and current of a storage battery pack and measuring the charging and discharging display condition of the storage battery pack;
the DSP controller is integrally provided with a buffer memory with the working voltage of 3.3V and the core voltage of 1.8V, and the buffer memory supplies power to the buffer memory through a voltage regulator outputting 3.3V and 1.8V;
the sampling circuit is provided with a current sensor and a voltage follower; the current sensor is used for measuring the output current of the photovoltaic cell; the current sensor has the characteristic of converting the conversion current into voltage for measurement under the condition of not consuming energy; the sampling circuit samples and stores the voltage output from the solar cell in the DSP controller;
the voltage follower is arranged at the rear end of the voltage sampling circuit, so that the interference of a post-stage circuit to a pre-stage circuit is reduced, the isolation of the sampling circuit is realized, and the sampling circuit can more accurately acquire the voltage output by the solar cell;
the driving circuit is provided with an IGBT (voltage control device), a damping filter, a damping oscillator and a gate resistor; the damping filter is formed by an RC circuit consisting of a resistor and a capacitor, and the damping filter formed by the RC circuit is connected between the grid and the emitter of the IGBT and is used for eliminating the circuit oscillation phenomenon; the gate source end of the driving circuit is connected in parallel with a damping oscillator consisting of a 1 ohm resistor and a capacitor of 0.3 microfarad; the IGBT is used for inhibiting oscillation of an input signal, and the input end of the IGBT is connected with a gate resistor in series and used for preventing the IGBT from being burnt out when the space between a collector and an emitter is in a high-voltage state;
the measurement module realizes the maximum power independent power supply of the load and simultaneously charges the storage battery pack, and when the load is in rainy days or insufficient sunlight, the storage battery pack supplies power to the load to meet the requirement of the load;
the drive circuit is provided with an overcurrent protection circuit, the overcurrent protection circuit is powered by a single power supply to generate drive voltages of 15V and-5V, so that the IGBT can be switched on and off, and the overcurrent protection circuit is used for isolating other circuits by using a telling optical coupler to protect the switching-off of drive current;
MPPT control module (maximum power point tracking module) comprising: the system comprises a PI regulator (proportional-integral regulator), a zero-order retainer, a PWM module (pulse width modulation module) and a direct current booster circuit, wherein the PI regulator is a linear regulator, and the direct current booster circuit mainly comprises an inductor, a diode, a switching tube, a capacitor and a load;
through controlling the DCDC conversion circuit, the load is adjusted to be the voltage at two ends, the value of the voltage is equal to U/2 of the power supply voltage, the equivalent internal resistance value of the external load is equal to the equivalent resistance value inside the solar cell, the power reaches the maximum value, the problem of low output efficiency of the cell is solved, the electric energy loss is reduced, the output of the solar square matrix can reach the output of the maximum power point, and the photoelectric conversion efficiency is higher and more stable.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a circuit block diagram of the power supply architecture of the present invention;
FIG. 2 is a circuit diagram of a measurement module versus current voltage sampling of the present invention;
FIG. 3 is a graph of a maximum power output tracking simulation waveform of the present invention;
FIG. 4 is a circuit diagram of a measurement module driver of the present invention;
fig. 5 is a circuit diagram of overcurrent protection of the driving circuit of the invention.
Detailed Description
The following description and the annexed drawings set forth in detail certain illustrative embodiments of the invention to enable those skilled in the art to practice them, and the subject matter of the invention is more particularly described below by way of example and with reference to the accompanying drawings.
Referring to fig. 1, a circuit block diagram of the power supply architecture of the present invention is presented;
an alternative embodiment of the invention is a maximum power independent power supply system based on DSP, a DCDC conversion circuit, an energy storage inductor, a power switch tube, a diode, a capacitor and a load resistor, wherein the power switch tube is provided with a collector electrode coupled with an output end of the energy storage inductor and an emitter electrode coupled with a negative end of a voltage, the capacitor is connected with a conducting end of the diode in series and connected with the load resistor in parallel,
the function of the DCDC conversion circuit in the whole system is to convert the output voltage and current into the voltage and current required by the load (or the storage battery pack). Because the output of the solar panel array is nonlinear and is easily influenced by external factors, the output electric energy cannot be directly connected with the storage battery pack, and a DCDC conversion circuit is required to be added between the output electric energy and the storage battery pack to convert the electric energy into the electric energy suitable for the work of the storage battery pack;
after a power switch tube of the DCDC conversion circuit is conducted, the voltage of a power supply is added to an energy storage inductor L, the inductive current is linearly increased, a diode is cut off, and a load is provided by a capacitor C; when the power switch tube is turned off, the inductive current flows to the output side through the diode D, the energy storage of the power supply and the energy storage inductor is transferred to the load and the capacitor C to charge the capacitor C, and the load resistor is maintained to work continuously; in the process of replacing the power switch tube with the diode, when the power switch tube S is conducted, the current passing through the power switch tube is i; when the switching tube S is turned off, the current through the diode D is also i. The boost inductor current can be obtained by superimposing the two currents i. When the circuit works in a steady state, the charge quantity and the discharge quantity of the capacitor C are equal, so that the average current flowing through the capacitor C is 0. The average value of the current through the diode D is the load current. And the increase of the inductive current during the conduction period of the power switch tube S is equal to the decrease of the inductive current during the cut-off period of the power switch tube S;
the storage battery pack is used for rapidly storing the electric quantity generated by the system, and when the power supply device cannot meet the power supply of the load, the storage battery pack discharges the load, so that the load can continue to work normally;
an anti-reverse charging diode is arranged between the DCDC conversion circuit and the storage battery pack, and when the electricity generated by the solar battery cannot meet the load requirement in rainy days and poor illumination, the storage battery pack is required to discharge the load; when the storage battery pack discharges, the anti-reverse-charging diode is conducted in the forward direction and cut off in the reverse direction, can bear enough current, is small in forward voltage drop and reverse saturation current, and effectively prevents the storage battery pack from discharging the solar panel array;
referring to FIG. 2, a circuit diagram of a measurement module versus current voltage sampling of the present invention is shown;
a measurement module comprising:
the system comprises a voltage regulator, a driving circuit, a sampling circuit, a DSP controller and a display screen, wherein the voltage regulator, the driving circuit, the sampling circuit, the DSP controller and the display screen are used for sampling and storing output voltage and current of the system, processing signals and then putting the signals into a processing unit of the DSP controller, outputting the signals and adjusting duty ratio in the DCDC, controlling the output voltage and current of a storage battery pack and measuring the charging and discharging display condition of the storage battery pack;
the DSP controller is integrally provided with a buffer memory with the working voltage of 3.3V and the core voltage of 1.8V, and the buffer memory supplies power to the buffer memory through a voltage regulator outputting 3.3V and 1.8V;
the sampling circuit is provided with a current sensor and a voltage follower; the current sensor is used for measuring the output current of the photovoltaic cell; the current sensor has the characteristic of converting the conversion current into voltage for measurement under the condition of not consuming energy; the sampling circuit samples and stores the voltage output from the solar cell in the DSP controller;
the voltage follower is arranged at the rear end of the voltage sampling circuit, so that the interference of a post-stage circuit to a pre-stage circuit is reduced, the isolation of the sampling circuit is realized, and the sampling circuit can more accurately acquire the voltage output by the solar cell;
referring to fig. 4, a measurement module driving circuit diagram of the present invention is shown;
the driving circuit is provided with an IGBT (voltage control device), a damping filter, a damping oscillator and a gate resistor; the damping filter is formed by an RC circuit consisting of a resistor and a capacitor, and the damping filter formed by the RC circuit is connected between the grid and the emitter of the IGBT and is used for eliminating the circuit oscillation phenomenon; the gate source end of the driving circuit is connected in parallel with a damping oscillator consisting of a 1 ohm resistor and a capacitor of 0.3 microfarad; the IGBT is used for inhibiting oscillation of an input signal, and the input end of the IGBT is connected with a gate resistor in series and used for preventing the IGBT from being burnt out when the space between a collector and an emitter is in a high-voltage state;
the measurement module realizes the maximum power independent power supply of the load and simultaneously charges the storage battery pack, and when the load is in rainy days or insufficient sunlight, the storage battery pack supplies power to the load to meet the requirement of the load;
referring to fig. 5, a circuit diagram of the overcurrent protection circuit of the driving circuit of the present invention is shown;
if the IGBT is open-circuited between the grid and the emitter and voltage is applied between the collector and the emitter, the grid potential rises due to parasitic capacitance between the grid and the collector and the emitter along with the change of the collector potential, and current flows between the collector and the emitter, which causes the IGBT to be burnt out if the IGBT is in a high-voltage state between the collector and the emitter;
the drive circuit is provided with an overcurrent protection circuit, the overcurrent protection circuit is powered by a single power supply to generate drive voltages of 15V and-5V, so that the IGBT can be switched on and off, and the overcurrent protection circuit is used for isolating other circuits by using a telling optical coupler to protect the switching-off of drive current;
when the voltage of G-E two ends of the IGBT rises during overcurrent, D9 is turned off in reverse direction, then the voltage of a point C increases along with the rise of the charging voltage of C1, when the overcurrent phenomenon continuously occurs by about 15uS, the voltage of the point C enables a voltage regulator tube D6 to be conducted, Q3 is also conducted, the voltage of two ends of GE of the IGBT is reduced to about 10V through Q3, D4 and D1, if the voltage of the point C is restored to a low level within 10uS, the voltage is false overcurrent phenomenon and Q3 is cut off, and the circuit is restored to a normal working state; if the overcurrent occurs for more than 10us, a true overcurrent fault occurs, the voltage at the point C continues to rise, so that the hidden voltage tube D5 is conducted, the Q4 is immediately conducted, the potential at the point D is at a low level, the Q1 is conducted, due to the discharging action of the C1, the IGBT is turned off at a slow speed, meanwhile, the potential at the point E is locked at a high level through an RS latch formed by two NAND gates, and the high-speed optocoupler is always in a conducting state, so that overcurrent protection of the driving circuit is realized;
MPPT control module (maximum power point tracking) comprising: the power supply comprises a PI regulator, a zero-order retainer, a PWM module and a direct current booster circuit, wherein the direct current booster circuit mainly comprises an inductor, a diode, a switching tube, a capacitor and a load;
through controlling the DCDC conversion circuit, the load is adjusted to the voltage at two ends, the value of the voltage is equal to U/2 of the power supply voltage, the equivalent internal resistance value of the external load is equal to the equivalent resistance value inside the solar cell, the power reaches the maximum value, the problem of low output efficiency of the cell is solved, the electric energy loss is reduced, the output of the solar square matrix can reach the output of the maximum power point, and the photoelectric conversion efficiency is higher and more stable.
The PI regulator is used for processing the output current and voltage value of the photovoltaic cell collected by the sampling circuit, the zero-order retainer is used for collecting the current and voltage of the discrete signal, comparing the voltage and the power value sampled twice, determining the disturbance direction and the tracking step length, and further completing the tracking of the maximum power point: reasonable tracking length is selected according to the change value of the power value, so that the variable-step MPPT control can be realized,
the PWM module outputs square waves with variable duty ratio to drive the IGBT, and the driving of the power switch tube is realized by the square waves with variable duty ratio output by the PWM module; the method is realized by adjusting the intermittent conduction of a switching tube in the DCDC conversion circuit. In order to change the uncontrollable input direct current quantity into the controllable output direct current quantity, the maximum power tracking of the control line of the state of the switching tube is realized by driving through variable-step-size disturbance control and PWM waves, the output power is tracked by combining an open-circuit voltage method and a variable-step-size disturbance method,
referring to fig. 3, a maximum power output tracking simulation waveform diagram of the present invention is shown;
tracking occurs in the process of 0-0.2 seconds, the curve increasing speed is high, the system can quickly and accurately carry out MPPT tracking, even if the illumination intensity changes violently in 0.5 seconds due to almost no resonance, the system can automatically select large step length disturbance for optimization, the rapidity of algorithm tracking is guaranteed, when the maximum power point is close to, a small step length is selected for disturbance, the problem of tracking stability is solved, the speed of tracking the maximum power point is high, the automatic variable step length tracking precision is high, and therefore the maximum power point can be quickly tracked to meet the power supply requirement;
although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (5)
1. A maximum power independent power supply system based on DSP is characterized by comprising:
the power switch tube is provided with a collector electrode coupled with the output end of the energy storage inductor and an emitter electrode coupled with the negative end of the voltage, and the capacitor is connected with the conducting end of the diode in series and is connected with the load resistor in parallel;
after a power switch tube of the DCDC conversion circuit is conducted, the voltage of a power supply is added to an energy storage inductor L, the inductive current is linearly increased, a diode is cut off, and a load is provided by a capacitor C; when the power switch tube is turned off, the inductive current flows to the output side through the diode D, the energy storage of the power supply and the energy storage inductor is transferred to the load and the capacitor C, the capacitor C is charged, and the load resistor is maintained to work continuously;
in the process of replacing the power switch tube with the diode, when the power switch tube S is conducted, the current passing through the power switch tube is i; when the switching tube S is cut off, the current passing through the diode D is also i, and the boosting inductance current can be obtained by superposing the two currents i;
when the circuit works in a steady state, the charge quantity and the discharge quantity of the capacitor C are equal, so that the average current flowing through the capacitor C is 0; the average value of the current passing through the diode D is the load current, and the increase of the inductor current during the on-state of the power switch tube S is equal to the decrease of the inductor current during the off-state of the power switch tube S;
an anti-reverse charging diode is arranged between the DCDC conversion circuit and the storage battery pack, and when the electricity generated by the solar battery cannot meet the load requirement in rainy days and poor illumination, the storage battery pack is required to discharge the load; when the storage battery pack discharges, the anti-reverse-charging diode is conducted in the forward direction and cut off in the reverse direction, can bear enough current, is small in forward voltage drop and reverse saturation current, and effectively prevents the storage battery pack from discharging the solar panel array;
the measurement module consists of a voltage regulator, a driving circuit, a sampling circuit and a DSP controller;
the driving circuit is provided with an IGBT, a damping filter, a damping oscillator and a gate pole resistor; a damping filter formed by an RC circuit is connected between the grid electrode and the emitting electrode of the IGBT and is used for eliminating the circuit oscillation phenomenon;
the gate source end of the driving circuit is connected in parallel with a damping oscillator composed of a 1 ohm resistor and a 0.3 microfarad capacitor and used for inhibiting oscillation of an input signal;
the input end of the IGBT is connected with a gate resistor in series and is used for preventing the IGBT from being burnt out when the space between the collector and the emitter is in a high-voltage state;
the drive circuit is provided with an overcurrent protection circuit, and the overcurrent protection circuit is powered by a single power supply to generate drive voltages of 15V and-5V, so that the IGBT can be switched on and off.
2. The maximum power independent power supply system based on DSP as claimed in claim 1, wherein during the operation of the power switch tube and the diode, when the power switch tube is turned on, the current passing through the power switch tube is equal to the current passing through the diode when the power switch tube is turned off.
3. The maximum power independent power supply system based on DSP according to claim 1, wherein when said DCDC conversion circuit is operated in steady state, the charging quantity of said capacitor is equal to the discharging quantity; also, the average value of the current through the diode is equal to the load current value.
4. The maximum power independent power supply system based on DSP as claimed in claim 1, wherein said DSP controller is integrally installed with a buffer memory with an operating voltage of 3.3V and a core voltage of 1.8V, and the buffer memory is powered by a voltage regulator outputting 3.3V and 1.8V.
5. The maximum power independent power supply system based on DSP according to claim 1, characterized in that the sampling circuit is provided with a current sensor and a voltage follower;
the current sensor has the characteristic of converting the conversion current into voltage for measurement under the condition of not consuming energy, and is used for measuring the output current of the photovoltaic cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911094315.6A CN110854985B (en) | 2019-11-11 | 2019-11-11 | Maximum power independent power supply system based on DSP |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911094315.6A CN110854985B (en) | 2019-11-11 | 2019-11-11 | Maximum power independent power supply system based on DSP |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110854985A CN110854985A (en) | 2020-02-28 |
| CN110854985B true CN110854985B (en) | 2022-04-05 |
Family
ID=69601124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911094315.6A Active CN110854985B (en) | 2019-11-11 | 2019-11-11 | Maximum power independent power supply system based on DSP |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110854985B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112532047B (en) * | 2021-02-18 | 2021-04-16 | 上海芯龙半导体技术股份有限公司 | Switching power supply chip and system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104866000A (en) * | 2014-02-25 | 2015-08-26 | Abb有限公司 | Gate Drive Circuit With A Voltage Stabilizer And A Method |
| CN105991009A (en) * | 2015-02-13 | 2016-10-05 | 国家电网公司 | Active voltage-equalizing control method based on series compression type IGBT |
| CN108347165A (en) * | 2018-03-07 | 2018-07-31 | 何金昌 | A kind of improved variable step method of perturbation MPPT control devices, method and application system |
| CN208862578U (en) * | 2018-10-12 | 2019-05-14 | 中国葛洲坝集团机电建设有限公司 | A kind of photovoltaic power generation access system suitable for electric automobile charging station |
| CN110061722A (en) * | 2019-04-18 | 2019-07-26 | 电子科技大学 | A kind of bearing power adjustment circuit by MOS type device frequency conversion drive |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3429417B2 (en) * | 1996-11-15 | 2003-07-22 | 新電元工業株式会社 | Forward type DC-DC converter |
-
2019
- 2019-11-11 CN CN201911094315.6A patent/CN110854985B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104866000A (en) * | 2014-02-25 | 2015-08-26 | Abb有限公司 | Gate Drive Circuit With A Voltage Stabilizer And A Method |
| CN105991009A (en) * | 2015-02-13 | 2016-10-05 | 国家电网公司 | Active voltage-equalizing control method based on series compression type IGBT |
| CN108347165A (en) * | 2018-03-07 | 2018-07-31 | 何金昌 | A kind of improved variable step method of perturbation MPPT control devices, method and application system |
| CN208862578U (en) * | 2018-10-12 | 2019-05-14 | 中国葛洲坝集团机电建设有限公司 | A kind of photovoltaic power generation access system suitable for electric automobile charging station |
| CN110061722A (en) * | 2019-04-18 | 2019-07-26 | 电子科技大学 | A kind of bearing power adjustment circuit by MOS type device frequency conversion drive |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110854985A (en) | 2020-02-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR20160042148A (en) | Localized power point optimizer for solar cell installations | |
| CN104052391B (en) | Photovoltaic bypass and output switch apparatus and method | |
| CN103607006A (en) | A charging and discharging reuse circuit | |
| CN109066847B (en) | Photovoltaic power generation charge-discharge control circuit | |
| El-Faouri et al. | A smart street lighting system using solar energy | |
| CN109494793B (en) | Lithium-capacitor-based photovoltaic graded energy storage system with primary frequency modulation function | |
| KR20130082240A (en) | Control device for charging and discharging of super capacitor and rechargeable battery | |
| CN105262197A (en) | Grid-connected power generation control system for solar street lamp | |
| CN110854985B (en) | Maximum power independent power supply system based on DSP | |
| CN203632908U (en) | Solar lamp control device | |
| KR20040058151A (en) | PV power generation by maximum power point tracking | |
| CN102164443B (en) | Controller for solar street lamp | |
| CN204013325U (en) | A kind of Intelligent Power Station operating control device | |
| CN202738220U (en) | Intelligent solar LED street lamp controller | |
| CN210868250U (en) | Split type commercial power complementary solar street lamp controller | |
| CN202218031U (en) | Off-grid type electric power input control system | |
| KR100454896B1 (en) | Control system for charging and discharging solar photovoltaic module for solar streetlight and stand-alone system | |
| CN211019359U (en) | Photovoltaic street lamp control device and photovoltaic street lamp equipment | |
| KR101568278B1 (en) | High Efficiency Charging Device for Renewable Energy | |
| CN104470146B (en) | A kind of self adaptation long-life sampling solar street lamp controller | |
| CN111769740A (en) | MPPT charging system based on buck-boost conversion | |
| Tseng et al. | Buck-boost combined with active clamp flyback converter for PV power system | |
| CN111934376A (en) | Control method of low-voltage input constant-voltage output solar controller | |
| Halder | Modelling and Simulation of a Bi-Directional DC to DC Converter System | |
| CN116915169B (en) | Photovoltaic cell bypass circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |