CN212343413U - Off-grid wind-solar hybrid controller - Google Patents
Off-grid wind-solar hybrid controller Download PDFInfo
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- CN212343413U CN212343413U CN202021237894.3U CN202021237894U CN212343413U CN 212343413 U CN212343413 U CN 212343413U CN 202021237894 U CN202021237894 U CN 202021237894U CN 212343413 U CN212343413 U CN 212343413U
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Abstract
The utility model provides an off-grid wind-solar hybrid controller relates to singlechip automated control technical field. The utility model comprises a solar battery pack, a wind generating set, a storage battery pack, a microcontroller, a boosting inversion module, a charging and discharging protection module, a driving circuit, a temperature measuring module and a fan; the microcontroller with the PIC single chip microcomputer is used as a main control module to monitor the storage battery in real time, the storage battery is prevented from excessively releasing electric energy, the electric energy is prevented from overflowing or being excessively charged, the electric energy saturated battery is prevented from aging, the 48V direct-current voltage output by the storage battery is controlled by the driving module of the microcontroller through boosting inversion, and the voltage obtained after the boosting inversion is used for supplying power to an alternating-current load. The single chip microcomputer serves as a main controller and is compatible with two new energy resources, namely a wind driven generator and a photovoltaic cell device, so that the purposes of cleanness, high efficiency and zero pollution are achieved, the defects that an urban micro-grid abandons wind and light are overcome, and the energy utilization rate is effectively improved.
Description
Technical Field
The utility model relates to a singlechip automated control technical field especially relates to an off-grid scene complementary control ware.
Background
China has abundant natural resources and uneven energy distribution, which is a serious problem all the time. Water resources, coal/petroleum resources and wind energy/solar energy resources in China are unevenly distributed due to different regions, wind energy resources and solar energy resources have similar occupation proportions in the northern region of China, and regional power grid planning strategies are implemented in China, so that the complementation of the advantages of wind energy and solar energy in the northern region is one of important strategies for solving the problem of power utilization in the northern region.
Generally, a conventional wind-solar hybrid power generation system mainly comprises a solar cell, a storage battery, a fan and a load. The off-grid system is suitable for remote mountainous areas or island areas with smaller power supply requirements, solar energy and wind energy are converted into electric energy through the photovoltaic cell panel and the fan blade and transmitted to the storage battery for storage, and the wind generation set can transmit direct current electric energy to the storage battery only through rectification of the controller. At this moment, if the environment is changed outside, uncertainty of solar energy and wind energy can cause instability of new energy power generation, and at this moment, a control system is urgently needed for the system, so that control over output voltage can be realized, and stable electric energy output is provided for a load.
In order to avoid the problem that wind power and photovoltaic output are influenced by the environment, people are more and more researching wind and solar complementary control. A micro-control system with a PIC singlechip as a main body is designed to be a necessary link in wind-solar complementary coordinated operation at present. In addition, the wind power system and the photovoltaic system are both renewable energy sources, so that the environment is not polluted, the consumption of fossil fuel is relatively reduced, the utilization rate of clean energy is improved, and people can be better served.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the off-grid wind-solar hybrid controller is provided, the load electric energy is guaranteed to be provided under the condition of environmental change, the reliability is high, the cost is low, and the stable operation of a power grid is guaranteed.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is:
an off-grid wind-solar hybrid controller comprises a solar battery pack, a wind generating set, a storage battery pack, a microcontroller, a boosting inversion module, a charging and discharging protection module, a driving circuit, a temperature measurement module and a fan;
the output ends of the solar battery pack and the wind generating set are respectively connected with the input end of the storage battery pack;
the input end of the boosting inversion module is connected with the output end of the storage battery pack;
the output end of the driving circuit is connected with the input end of the boosting inversion module, the output end of the charging and discharging protection module is connected with the input end of the storage battery pack, the output end of the microcontroller is respectively connected with the input ends of the charging and discharging protection and driving circuit, and the output ends of the temperature measurement module and the fan are respectively connected with the input end of the microcontroller;
the microcontroller comprises a single chip microcomputer, a temperature sensor, a zero resistor, a first PWM controller, a second PWM controller, a third PWM controller, a fourth PWM controller, a fifth PWM controller, a sixth PWM controller and a direct-current power supply; the direct current power supply voltage boosting and inverting circuit comprises a single chip microcomputer, a voltage stabilizing and inverting module, a first PWM (pulse width modulation) pin, a second PWM pin, a third PWM pin, a fourth PWM pin, a fifth PWM pin and a sixth PWM pin, wherein the VCC pin of the single chip microcomputer is connected with the direct current power supply, the first PWM pin, the second PWM pin, the third PWM pin, the fourth PWM pin, the fifth PWM pin and the sixth PWM pin of the single chip microcomputer are respectively connected with a first PWM controller, a second PWM controller, a third PWM controller, a fourth PWM controller, a fifth PWM controller and a sixth PWM controller, the TEM pin of the single chip microcomputer is connected with a temperature sensor, the input end of a zero resistance is connected with the alternating current power supply, the input end of the temperature sensor is connected with the direct current power supply, and the output ends of the first PWM controller, the second PWM controller;
the charging and discharging protection module comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first optical coupler, a first power switch tube, a second power switch tube, a third triode, a first LED (light emitting diode), a second voltage regulator tube, a third voltage regulator tube, a first capacitor, a second capacitor, a direct current power supply, a solar battery pack, a wind driven generator, a first storage battery pack and a second storage battery pack; the input end of the first resistor is connected with a low level, the output end of the first resistor is connected with the input end of the first optical coupler, the input end of the second resistor is connected with the output end of the first optical coupler, the output end of the second resistor is connected with the output end of the first LED, the third resistor is connected with the second voltage regulator tube in parallel, one end of the third resistor is connected with the output end of the first LED, the other end of the third resistor is connected with the negative electrode of the wind driven generator and the negative electrode of the solar battery pack, one end of the fourth resistor is connected with the first capacitor, the other end of the fourth resistor is connected with the drain electrode of the first power switch tube, one end of the fifth resistor is connected with the second capacitor, the other end of the fifth resistor is connected with the drain electrode of the second power switch tube, one end of the sixth resistor is connected with a direct current power supply, the other end of the sixth resistor is connected with, One end of a second capacitor is connected with a source electrode of a second power switch tube, a cathode of a third voltage regulator tube is connected with a grid electrode of the second power switch tube, an anode of the third voltage regulator tube is connected with a drain electrode of the second power switch tube, a cathode of the first LED is connected with a second resistor, an anode of the first LED is connected with a positive electrode of a direct current power supply, a solar battery pack and a positive electrode of a wind driven generator are connected with a positive electrode of a first storage battery pack and a positive electrode of a second storage battery pack, a negative electrode of the first storage battery pack, a negative electrode of the second storage battery pack, a positive electrode of the third voltage.
The boost inverter circuit comprises two symmetrical push-pull amplification circuits and a full-bridge inverter circuit.
The two symmetrical push-pull discharge circuits comprise an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a fourth power switch tube, a fifth power switch tube, a sixth power switch tube, a seventh power switch tube, a first transformer and a second transformer; the eighth resistor is connected between the drain electrode and the grid electrode of the fourth power switch tube in parallel, the ninth resistor is connected between the drain electrode and the grid electrode of the fifth power switch tube in parallel, the tenth resistor is connected between the drain electrode and the grid electrode of the sixth power switch tube in parallel, the eleventh resistor is connected between the drain electrode and the grid electrode of the seventh power switch tube in parallel, the output end of the first PWM controller is connected with the grid electrodes of the fourth and seventh power switch tubes, the output end of the second PWM controller is connected with the grid electrodes of the fifth and sixth power switch tubes, one primary side of the first transformer is connected with the source electrode of the fourth power switch tube, the other end of the first transformer is connected with the source electrode of the fifth power switch tube, one secondary side of the first transformer is correspondingly connected with one primary side of the second transformer, one secondary side of the second transformer is connected with the source electrode of the sixth power switch tube, and the other end of the second transformer is connected with, the drains of the fourth, fifth, sixth and seventh power switch tubes are respectively connected with the ground, the anode of the first storage battery pack is connected with a first transformer tap, the cathode of the first storage battery pack is connected with the ground, the anode of the second storage battery pack is connected with a second transformer tap, and the cathode of the second storage battery pack is connected with the ground;
the full-bridge inverter circuit comprises a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighth power switch tube, a ninth power switch tube, a tenth power switch tube, an eleventh power switch tube, a twelfth power switch tube, a fourth voltage regulator tube, a fifth voltage regulator tube, a sixth voltage regulator tube, a seventh voltage regulator tube, a third PWM controller, a fourth PWM controller, a fifth PWM controller, a sixth PWM controller, an inductor, a third capacitor, a first electromagnetic relay, a second electromagnetic relay and an alternating current voltage source; the twelfth resistor is connected between a grid electrode and a drain electrode of an eighth power switch tube in parallel, the thirteenth resistor is connected between a grid electrode and a drain electrode of a ninth power switch tube in parallel, the fourteenth resistor is connected between a grid electrode and a drain electrode of an eleventh power switch tube in parallel, the fifteenth resistor is connected between a grid electrode and a drain electrode of a tenth power switch tube in parallel, the sixteenth resistor input end is connected with the drain electrode of the twelfth power switch tube, the output end is connected with a high level, the seventeenth resistor input end is connected with the grid electrode of the twelfth power switch tube, the output end is connected with a high level, the fourth voltage-regulator tube is connected between the source electrode and the drain electrode of the eighth power switch tube in parallel, the fifth voltage-regulator tube is connected between the source electrode and the drain electrode of the ninth power switch tube in parallel, the sixth voltage-regulator tube is connected between the source electrode and the drain electrode of the tenth power switch tube in parallel, and the, the output end of the third PWM controller is connected with a grid electrode of an eighth power switch tube, the output end of the fourth PWM controller is connected with a grid electrode of an eleventh power switch tube, the output end of the fifth PWM controller is connected with a grid electrode of a ninth power switch tube, the output end of the sixth PWM controller is connected with a grid electrode of a tenth power switch tube, one end of the inductor is connected with a drain electrode of the eighth power switch tube, the other end of the inductor is connected with the input end of a first electromagnetic relay, one end of the third capacitor is connected with the input end of the first electromagnetic relay, the other end of the third capacitor is connected with the input end of a second electromagnetic relay, the output ends of the first electromagnetic relay and the second electromagnetic relay are respectively connected with a source electrode of a twelfth power switch tube and an alternating current voltage source, and drain electrodes of the ninth power switch tube;
adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
the utility model provides a pair of from net formula scene complementary control ware, because there is power supply unit to the storage battery charging overcharge, during operation battery temperature too high, direct current boost circuit transistor loss is big, transformer magnetic circuit inefficiency, output voltage appear overflowing, excessive pressure, under-voltage, cross-frequency, lack frequently and a great deal of problem such as battery energy storage is not enough from net formula scene complementary control ware. Therefore, the control strategy is designed, the problem that the storage battery cannot detect the temperature and the electric quantity of the battery is solved, the waveform quality of output electric energy is optimized, the continuity of inversion voltage and the stability of a load are ensured, and the reliability of the wind-solar hybrid device is effectively improved.
Drawings
FIG. 1 is a diagram of an off-grid wind-solar hybrid controller according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a microcontroller according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a charge-discharge protection module according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a two-way symmetric push-pull amplifying circuit according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a full-bridge inverter circuit according to an embodiment of the present invention;
FIG. 6 is a flow chart of an off-grid wind-solar hybrid control method according to an embodiment of the present invention;
fig. 7 actual operation data of the 24-hour wind-solar hybrid device according to the embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
The utility model adopts the technical proposal that:
the utility model provides an off-grid wind-solar hybrid controller, as shown in figure 1, comprising a solar battery pack, a wind generating set, a storage battery pack, a microcontroller, a boosting inversion module, a charging and discharging protection module, a driving circuit, a temperature measurement module and a fan;
in the embodiment, the singlechip adopts PIC16F15356, and the temperature sensor adopts DS18B 20;
the output ends of the solar battery pack and the wind generating set are respectively connected with the input end of the storage battery pack;
the input end of the boosting inversion module is connected with the output end of the storage battery pack;
the output end of the driving circuit is connected with the input end of the boosting inversion module, the output end of the charging and discharging protection module is connected with the input end of the storage battery pack, the output end of the microcontroller is respectively connected with the input ends of the charging and discharging protection and driving circuit, and the output ends of the temperature measurement module and the fan are respectively connected with the input end of the microcontroller;
the microcontroller comprises a PIC16F15356 single chip microcomputer, a DS18B20 temperature sensor and a zeroth resistor R as shown in FIG. 20The controller comprises a first PWM controller PWM1, a second PWM controller PWM2, a third PWM controller PWM3, a fourth PWM controller PWM4, a fifth PWM controller PWM5, a sixth PWM controller PWM6, +5V direct current power supply and alternating current voltage; the VCC pin of the PIC16F15356 single chip microcomputer is connected with a +5V direct current power supply, a first PWM pin, a second PWM pin, a third PWM pin, a fourth PWM pin, a fifth PWM pin and a sixth PWM pin of the PIC16F15356 single chip microcomputer are respectively connected with a first PWM1 controller, a second PWM2 controller, a third PWM3 controller, a fourth PWM4 controller, a fifth PWM5 controller and a sixth PWM6 controller, a TEM pin of the PIC16F15356 single chip microcomputer is connected with a DS18B20 temperature sensor, a zero resistor R is connected with a zero resistor R, and a third PWM pin, a fourth PWM pin, a fifth PWM pin and a sixth PWM pin of the PIC16F15356 single chip microcomputer are respectively0The input end of the DS18B20 temperature sensor is connected with an alternating current power supply, the input end of the DS18B20 temperature sensor is connected with a +5V direct current power supply, and the output ends of a first PWM controller PWM1, a second PWM controller PWM2, a third PWM controller PWM3, a fourth PWM controller PWM4, a fifth PWM controller PWM5 and a sixth PWM controller PWM6 are respectively connected with the input end of the boosting inversion module;
the charge and discharge protection module is shown in FIG. 3 and comprises a first resistor R1A second resistor R2A third resistor R3A fourth resistor R4A fifth resistor R5A sixth resistor R6A seventh resistor R7A first optical coupler U1A first power switch tube Q1A second power switch tube Q2And a third triode Q3A first LED D1A second voltage regulator tube D2And a third voltage regulator tube D3A first capacitor C1A second capacitor C2Direct-current power supply, solar battery pack, wind driven generator and first storage battery pack B1The first stepAnd two battery packs B2. The first resistor R1The input end is connected with the low level, and the output end is connected with the first optical coupler U1Input terminal connection, the second resistance input terminal R2And a first optical coupler U1The output end is connected with the first LED D1Output connection, the third resistor R3And a second voltage regulator tube D2Connected in parallel, one end of which is connected with a first optical coupler U1The output is connected, the other end is connected with the cathode of the wind driven generator and the cathode of the solar battery pack, and the fourth resistor R4One terminal and the first capacitor C1Connected with the other end of the first power switch tube Q1Drain electrode connected, the fifth resistor R5One terminal and a second capacitor C2Connected with the other end of the second power switch tube Q2Drain electrode connected, the sixth resistor R6One end is connected with a DC power supply, and the other end is connected with a third triode Q3Collector electrode connection, the seventh resistor R7Input terminal and third triode Q3Base electrode is connected, output end is connected with low level, the first power switch tube Q1The source electrodes are respectively connected with the first capacitor C1One terminal, a second capacitor C2One end, second power switch tube Q2Source electrode connected, the third voltage regulator tube D3Cathode and second power switch tube Q2Grid electrode connected to the second power switch tube Q2Drain electrode connected to the first LED light emitting diode D1Cathode and second resistor R2The anode of the solar battery pack is connected with the positive pole of the direct-current power supply, and the solar battery pack, the positive pole of the wind driven generator and the first storage battery pack B1And a second battery pack B2Positive electrode connection, the first battery pack B1Negative electrode, second battery B2Negative pole, third voltage regulator tube D3Anode, third triode Q3The emitters are respectively connected to ground.
The boost inverter circuit comprises two symmetrical push-pull amplification circuits and a full-bridge inverter circuit;
the two-way symmetric push-pull amplifying circuit is shown in fig. 4, and comprises: eighth resistor R8A ninth resistor R9Tenth, theResistance R10An eleventh resistor R11And a fourth power switch tube Q4The fifth power switch tube Q5And a sixth power switch tube Q6Seventh power switch tube Q7A first transformer T1A second transformer T2(ii) a The eighth resistor R8Connected in parallel to the fourth power switch tube Q4Between drain and gate, the ninth resistor R9Is connected in parallel to the fifth power switch tube Q5Between the drain and the gate, the tenth resistor R10Parallel connection and sixth power switch tube Q6Between the drain and the gate, the eleventh resistor R11Parallel connection and seventh power switch tube Q7Between drain and grid, the output end of the first PWM controller PWM1 is connected with the grids of the fourth and seventh power switches, the output end of the second PWM controller PWM2 is connected with the grids of the fifth and sixth power switches, and the first transformer T1Primary side end and fourth power switch tube Q4Source electrode connected to the fifth power switch tube Q5Source electrode connection, the first transformer T1One end of the secondary side and a second transformer T2One end of the primary side is correspondingly connected with the second transformer T2One end of the secondary side and a sixth power switch tube Q6Source electrode connected to the seventh power switch tube Q7The source electrode is connected, the drain electrodes of the fourth, fifth, sixth and seventh power switching tubes are respectively connected with the ground, and the first storage battery pack B1Positive pole and first transformer T1Tap connection, negative pole connected to ground, and second battery B2Positive pole and second transformer T2The tap is connected, and the negative electrode is connected with the ground;
as shown in fig. 5, the full-bridge inverter circuit includes: twelfth resistor R12A thirteenth resistor R13A fourteenth resistor R14A fifteenth resistor R15Sixteenth resistor R16Seventeenth resistor R17The eighth power switch tube Q8And a ninth power switch tube Q9The tenth power switch tube Q10Eleventh power switch tube Q11The twelfth power switch tube Q12And the fourth voltage-stabilizing tubeD4And the fifth voltage-regulator tube D5And a sixth voltage regulator tube D6And the seventh voltage regulator tube D7A third PWM controller PWM3, a fourth PWM controller PWM4, a fifth PWM controller PWM5, a sixth PWM controller PWM6, an inductor L1A third capacitor C3A first electromagnetic relay K1A second electromagnetic relay K2(ii) a The twelfth resistor R12Connected in parallel to the eighth power switch tube Q8A thirteenth resistor R between the gate and the drain13Connected in parallel to the ninth power switch tube Q9Between the gate and the drain, the fourteenth resistor R14Connected in parallel to the eleventh power switch tube Q11Between the gate and the drain, the fifteenth resistor R15Connected in parallel to the tenth power switch tube Q10Between the grid and the drain, the sixteenth resistor R16Input end and twelfth power switch tube Q12A drain connected to the high level, and an output connected to the seventeenth resistor R17Input end and twelfth power switch tube Q12Grid electrode, output end connected with high level, and fourth voltage regulator tube D4Connected in parallel to the eighth power switch tube Q8Between the source and the drain, the fifth voltage regulator tube D5Connected in parallel to the ninth power switch tube Q9Between the source and the drain, the sixth voltage regulator tube D6Is connected in parallel to a tenth power switch tube Q10Between the source and the drain, the seventh voltage regulator tube D7Is connected in parallel to the eleventh power switch tube Q11Between the source and the drain, the output end of the third PWM controller PWM3 and the eighth power switch tube Q8The grid electrode is connected, and the output end of the fourth PWM controller PWM4 is connected with an eleventh power switch tube Q11The grid electrode is connected, and the output end of the fifth PWM controller PWM5 is connected with the ninth power switch tube Q9The grid electrode is connected, and the output end of the sixth PWM controller PWM6 is connected with a tenth power switch tube Q10Gate connection, the inductance L1One end of the eighth power switch tube Q8Drain electrode connected to the first electromagnetic relay K1Input terminals connected, the third capacitor C3One end of the first electromagnetic relay K1The input end is connected, and the other end is connected with a second electromagnetic relayK1Input terminals connected, the first electromagnetic relay K1A second electromagnetic relay K2The output ends of the three-phase current transformer are respectively connected with a twelfth power switch tube Q12The drain electrodes of the ninth, tenth and twelfth power switching tubes are connected with the ground;
on the other hand, the control method of the off-grid wind-solar hybrid controller of the present invention is shown in fig. 6, and comprises the following steps:
step 1: judging whether the solar battery pack and the wind generating set charge the first storage battery pack and the second storage battery pack or not by detecting the grid bias voltage of a first power switch tube of the charge-discharge protection module, and if the bias voltage is positive, the solar battery pack and the wind generating set charge the storage battery pack; if the bias voltage is negative, the solar battery pack and the wind generating set do not charge the storage battery pack;
step 2: detecting whether the output level of the charge and discharge protection module is a high level; if the high level is output, the storage battery is charged, at the moment, the first optical coupler stops working, the first power switch tube is cut off, the third triode is conducted, the grid electrode and the source electrode potential of the second power switch tube are reduced, so that the second power switch tube is cut off, the solar battery pack is disconnected with the storage battery pack, and overshoot protection is realized; if the low level is output, continuing to charge;
and step 3: the superposition of output voltages of the first transformer and the second transformer is realized through two symmetrical push-pull discharge circuits, and amplified direct-current voltage is obtained;
and 4, step 4: by detecting the output voltage of the DS18B20 temperature sensor, if the detection sensor outputs a high level, the temperature of the first storage battery pack and the second storage battery pack is too high, the fan is automatically started to dissipate heat, and if the detection sensor outputs a low level, the temperature of the storage battery packs is qualified, and the fan is not needed to dissipate heat;
and 5: through a full-bridge inverter circuit, the eighth power switch tube, the ninth power switch tube, the tenth power switch tube and the eleventh power switch tube on opposite sides of the bridge circuit are alternately conducted, and alternating-current voltage is obtained through inversion;
step 6: the twelfth power switch tube at the tail end of the full-bridge inverter circuit realizes good suppression of high-frequency noise; if the output voltage of the full-bridge inverter has overcurrent, overvoltage, undervoltage, over-frequency, under-frequency and insufficient battery energy storage, a high level is input into a controller at the tail end of the full-bridge inverter circuit, the first electromagnetic relay and the second electromagnetic relay work, and the switches are closed to protect the load circuit; if the situation does not occur, the input of the controller at the tail end of the full-bridge inverter circuit is automatically adjusted to be low level.
In the wind-solar hybrid model, the actual power operation data of each power supply of the system within 24 hours a day is collected, as shown in fig. 7. Since the new energy output has a certain fluctuation, the average active output within 1 hour is used as the power output in the period. In a wind-solar hybrid model, the rated output power of a solar battery pack is 70kW, the rated output power of a wind driven generator is 40kW, an energy storage battery is intermittently charged and discharged, when the power of the energy storage battery is a negative value, the photovoltaic battery and the wind driven generator are charged to a first storage battery and a second storage battery, and when the power of the energy storage battery is a positive value, the photovoltaic battery and the wind driven generator are supplied with power to a load through the first storage battery and the second storage battery, wherein in 8-18 days, the solar battery pack is used as the main power supply form of the wind-solar hybrid system, the output of the wind driven generator is intermittently changed, and is greatly influenced by the environment.
Before the system runs 8 times, the grid bias of a first power switch tube of the control circuit charging and discharging protection module is positive, the solar battery pack and the wind generating set are charging the storage battery pack, the output level of the charging and discharging protection module is low, and charging is kept. When the system runs to 8 hours, the storage battery is charged, at the moment, the first optical coupler stops working, the first power switch tube is cut off, the third triode is conducted, the grid electrode and the source electrode potential of the second power switch tube are reduced, so that the second power switch tube is cut off, the solar battery pack is disconnected with the storage battery pack, overshoot protection is achieved, power is supplied to a load, superposition of output voltages of the first transformer and the second transformer is achieved through two symmetrical push-pull discharge circuits, and amplified direct-current voltage is obtained. At about 13 hours, because the output of the wind driven generator is reduced, the discharging to the load is stopped at the moment, the grid bias of the first power switch tube of the charging and discharging protection module is positive, the solar battery pack and the wind driven generator set continue to charge the storage battery pack, the charging and discharging protection module outputs low level, and the charging is continued. At about 18 hours, the solar battery pack stops supplying power, the wind-solar hybrid system enters a single-running state of the wind driven generator, the output voltage of the full-bridge inverter is under-voltage, under-frequency and insufficient in battery energy storage, the high level is input by the controller at the tail end of the full-bridge inverter circuit, the first electromagnetic relay and the second electromagnetic relay work, the switches are attracted to protect the load circuit, meanwhile, the grid bias voltage of the first power switch tube of the control circuit charging and discharging protection module is positive, and the wind driven generator set charges the storage battery until 8 days earlier.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; but such modifications and substitutions do not depart from the spirit of the corresponding technical solutions and the scope of the present invention as defined in the appended claims.
Claims (4)
1. An off-grid wind-solar hybrid controller is characterized in that: the solar energy charging and discharging system comprises a solar battery pack, a wind generating set, a storage battery pack, a microcontroller, a boosting inversion module, a charging and discharging protection module, a driving circuit, a temperature measuring module and a fan;
the output ends of the solar battery pack and the wind generating set are respectively connected with the input end of the storage battery pack; the input end of the boosting inversion module is connected with the output end of the storage battery pack; the output end of the driving circuit is connected with the input end of the boosting inversion module, the output end of the charging and discharging protection module is connected with the input end of the storage battery pack, the output end of the microcontroller is respectively connected with the input ends of the charging and discharging protection and driving circuit, and the output end of the temperature measurement module and the output end of the fan are respectively connected with the input end of the microcontroller.
2. The off-grid wind-solar hybrid controller according to claim 1, wherein the microcontroller comprises a single chip microcomputer, a temperature sensor, a zero resistor, a first PWM controller, a second PWM controller, a third PWM controller, a fourth PWM controller, a fifth PWM controller, a sixth PWM controller and a direct current power supply; the direct current power supply voltage boosting and inverting circuit comprises a single chip microcomputer, and is characterized in that a VCC pin of the single chip microcomputer is connected with a direct current power supply, a first PWM pin, a second PWM pin, a third PWM pin, a fourth PWM pin, a fifth PWM pin and a sixth PWM pin of the single chip microcomputer are respectively connected with a first PWM controller, a second PWM controller, a third PWM controller, a fourth PWM controller, a fifth PWM controller and a sixth PWM controller, a TEM pin of the single chip microcomputer is connected with a temperature sensor, a zero resistance input end is connected with an alternating current power supply, an input end of the temperature sensor is connected with the direct current power supply, and output ends of the first PWM controller, the second PWM controller, the third PWM controller, the fourth PWM controller, the fifth PWM controller and the sixth PWM controller are respectively connected with an input end of a voltage boosting and inverting module.
3. The off-grid wind-solar hybrid controller according to claim 1, wherein the charge-discharge protection module comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first optical coupling device, a first power switch tube, a second power switch tube, a third triode, a first LED light emitting diode, a second voltage regulator tube, a third voltage regulator tube, a first capacitor, a second capacitor, a direct current power supply, a solar battery pack, a wind driven generator, a first storage battery pack and a second storage battery pack; the input end of the first resistor is connected with a low level, the output end of the first resistor is connected with the input end of the first optical coupler, the input end of the second resistor is connected with the output end of the first optical coupler, the output end of the second resistor is connected with the output end of the first LED, the third resistor is connected with the second voltage regulator tube in parallel, one end of the third resistor is connected with the output end of the first LED, the other end of the third resistor is connected with the negative electrode of the wind driven generator and the negative electrode of the solar battery pack, one end of the fourth resistor is connected with the first capacitor, the other end of the fourth resistor is connected with the drain electrode of the first power switch tube, one end of the fifth resistor is connected with the second capacitor, the other end of the fifth resistor is connected with the drain electrode of the second power switch tube, one end of the sixth resistor is connected with a direct current power supply, the other end of the sixth resistor is connected with, One end of a second capacitor is connected with a source electrode of a second power switch tube, a cathode of a third voltage regulator tube is connected with a grid electrode of the second power switch tube, an anode of the third voltage regulator tube is connected with a drain electrode of the second power switch tube, a cathode of the first LED is connected with a second resistor, an anode of the first LED is connected with a positive electrode of a direct current power supply, a solar battery pack and a positive electrode of a wind driven generator are connected with a positive electrode of a first storage battery pack and a positive electrode of a second storage battery pack, a negative electrode of the first storage battery pack, a negative electrode of the second storage battery pack, a positive electrode of the third voltage.
4. The off-grid wind-solar hybrid controller according to claim 1, wherein the boost inverter circuit comprises two symmetrical push-pull amplification circuits and a full-bridge inverter circuit;
the two symmetrical push-pull discharge circuits comprise an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a fourth power switch tube, a fifth power switch tube, a sixth power switch tube, a seventh power switch tube, a first transformer and a second transformer; the eighth resistor is connected between the drain electrode and the grid electrode of the fourth power switch tube in parallel, the ninth resistor is connected between the drain electrode and the grid electrode of the fifth power switch tube in parallel, the tenth resistor is connected between the drain electrode and the grid electrode of the sixth power switch tube in parallel, the eleventh resistor is connected between the drain electrode and the grid electrode of the seventh power switch tube in parallel, the output end of the first PWM controller is connected with the grid electrodes of the fourth and seventh power switch tubes, the output end of the second PWM controller is connected with the grid electrodes of the fifth and sixth power switch tubes, one primary side of the first transformer is connected with the source electrode of the fourth power switch tube, the other end of the first transformer is connected with the source electrode of the fifth power switch tube, one secondary side of the first transformer is correspondingly connected with one primary side of the second transformer, one secondary side of the second transformer is connected with the source electrode of the sixth power switch tube, and the other end of the second transformer is connected with, the drains of the fourth, fifth, sixth and seventh power switch tubes are respectively connected with the ground, the anode of the first storage battery pack is connected with a first transformer tap, the cathode of the first storage battery pack is connected with the ground, the anode of the second storage battery pack is connected with a second transformer tap, and the cathode of the second storage battery pack is connected with the ground;
the full-bridge inverter circuit comprises a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighth power switch tube, a ninth power switch tube, a tenth power switch tube, an eleventh power switch tube, a twelfth power switch tube, a fourth voltage regulator tube, a fifth voltage regulator tube, a sixth voltage regulator tube, a seventh voltage regulator tube, a third PWM controller, a fourth PWM controller, a fifth PWM controller, a sixth PWM controller, an inductor, a third capacitor, a first electromagnetic relay, a second electromagnetic relay and an alternating current voltage source; the twelfth resistor is connected between a grid electrode and a drain electrode of an eighth power switch tube in parallel, the thirteenth resistor is connected between a grid electrode and a drain electrode of a ninth power switch tube in parallel, the fourteenth resistor is connected between a grid electrode and a drain electrode of an eleventh power switch tube in parallel, the fifteenth resistor is connected between a grid electrode and a drain electrode of a tenth power switch tube in parallel, the sixteenth resistor input end is connected with the drain electrode of the twelfth power switch tube, the output end is connected with a high level, the seventeenth resistor input end is connected with the grid electrode of the twelfth power switch tube, the output end is connected with a high level, the fourth voltage-regulator tube is connected between the source electrode and the drain electrode of the eighth power switch tube in parallel, the fifth voltage-regulator tube is connected between the source electrode and the drain electrode of the ninth power switch tube in parallel, the sixth voltage-regulator tube is connected between the source electrode and the drain electrode of the tenth power switch tube in parallel, and the, the output end of the third PWM controller is connected with a grid electrode of an eighth power switch tube, the output end of the fourth PWM controller is connected with a grid electrode of an eleventh power switch tube, the output end of the fifth PWM controller is connected with a grid electrode of a ninth power switch tube, the output end of the sixth PWM controller is connected with a grid electrode of a tenth power switch tube, one end of the inductor is connected with a drain electrode of the eighth power switch tube, the other end of the inductor is connected with the input end of a first electromagnetic relay, one end of the third capacitor is connected with the input end of the first electromagnetic relay, the other end of the third capacitor is connected with the input end of a second electromagnetic relay, the output ends of the first electromagnetic relay and the second electromagnetic relay are respectively connected with a source electrode of the twelfth power switch tube and an alternating current voltage source, and the drain electrodes of the ninth power switch.
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