CN202902134U - Solar energy-saving illuminating system - Google Patents

Solar energy-saving illuminating system Download PDF

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Publication number
CN202902134U
CN202902134U CN201220576302XU CN201220576302U CN202902134U CN 202902134 U CN202902134 U CN 202902134U CN 201220576302X U CN201220576302X U CN 201220576302XU CN 201220576302 U CN201220576302 U CN 201220576302U CN 202902134 U CN202902134 U CN 202902134U
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China
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triode
circuit
power supply
resistance
battery
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CN201220576302XU
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Chinese (zh)
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朱正菲
周士晖
张玉华
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浙江省能源与核技术应用研究院
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

The utility model relates to a solar energy-saving illuminating system. An electric light source is powered directly by solar power in the daytime, and extra solar power is used for charging a storage battery for illuminating in the night. According to the technical scheme, the solar energy-saving illuminating system comprises a solar cell, the storage battery, an AC/DC (alternating current/direct current) stand-by power supply and LED lamp groups and is characterized in that the solar cell, the storage battery and the AC/DC stand-by power supply are connected with the LED lamp groups through a system controller. The system controller comprises a charging managing module, a power supply optimizing module and a illuminating control module. The charging managing module is used for controlling the solar cell to charge the storage battery. The power supply optimizing module is used for switching among the solar cell, the storage battery and the AC/DC stand-by power supply to power the LED lamp groups. The illuminating control module is used for controlling output power of the LED lamp groups. The solar energy-saving illuminating system is applicable to the technical field of solar power.

Description

A kind of solar powered energy efficient lighting system

Technical field

The utility model relates to a kind of solar powered energy efficient lighting system.Be applicable to technical field of solar.

Background technology

Growing along with social and economic construction, China has become energy resource consumption big country, with coal, oil, natural gas is main conventional energy resource consumption, and its resource is non-renewable, and carbon dioxide and sulfur oxide are discharged in simultaneously these energy resource consumptions, cause global greenhouse effect and acid rain, welding.Therefore in order preserving the ecological environment, to realize sustainable development, to the development and use of regenerative resource, to arise at the historic moment.

Solar lighting developed rapidly in recent years as the renewable energy utilization technology, and market is to the demand day by day of solar energy illuminating product.Solar lighting is take solar energy as the energy, realizes opto-electronic conversion by solar cell.Present solar illuminating system is daytime with battery savings, stored electric energy mostly, and power to electric light source by controller evening.But along with the needs of development and the economic construction of society, numerous illumination occasions resembles the electricity consumption on daytime that building, office building underground garage etc. all need of waiting of large supermarket, market, hospital, school, boat station, station, and power consumption is large, forms by day peak of power consumption.

Summary of the invention

The technical problems to be solved in the utility model is: for the problem of above-mentioned existence, a kind of environmental protection is provided, safe and reliable solar powered energy efficient lighting system, can be by day with solar energy directly to the power supply of electric light source, also unnecessary solar energy can be charged as battery simultaneously illumination is provided night, to alleviate the excessive contradiction of peak power load, also can be country and save the part electric power resource, at utmost realize the requirement of ecological, environmental protective and energy-saving low-carbon.

The technical scheme that the utility model adopts is: a kind of solar powered energy efficient lighting system, have solar cell, battery, AC/DC stand-by power supply and LED light fixture group, it is characterized in that: described solar cell, battery and AC/DC stand-by power supply are all through system controller connection LED light fixture group, and described system controller comprises:

Charge management module, the control solar cell is charge in batteries, when solar cell directly is the power supply of LED light fixture group, unnecessary electric weight is stored in the battery;

The power supply preferred module, be used for switching between solar cell, battery and AC/DC stand-by power supply three the power supply to the power supply of LED light fixture group, solar cell for supplying power is preferential, secondly by storage battery power supply, in the time of both can't effectively powering, start the power supply of AC/DC stand-by power supply;

Lighting control module is used for control LED light fixture group power output.

Described charge management module comprises MPPT, and solar cell connects battery through MPPT, and battery also was connected to, low-voltage protection circuit and temperature protection circuit.

Described power supply preferred module comprises reverse-connection preventing circuit and power supply priority control circuit, and solar cell, battery and AC/DC stand-by power supply are connected to the power supply priority control circuit through reverse-connection preventing circuit respectively.

Described lighting control module has noncontacting switch; and illumination control circuit and the time switch of control noncontacting switch break-make; described power supply priority control circuit is connected to LED light fixture group through illumination control circuit and noncontacting switch, also is connected to current foldback circuit between LED light fixture group and the illumination control circuit.

Described reverse-connection preventing circuit has FET, the grid of FET, the indirect Zener diode of source electrode, drain electrode, the indirect diode of source electrode, source ground, grid connecting resistance.

Described power supply priority control circuit comprise sun-generated electric power signal sample circuit, battery feed signal sample circuit, the chain rate that stagnates than circuit I and stagnant chain rate than circuit I I, sun-generated electric power signal sample circuit sampling solar battery power signal, chain rate judges whether and can effectively power than circuit I through stagnating, such as starting storage battery power signal sampling circuit sampling storage battery source signal then, judge whether and effectively to power than circuit I I through the chain rate that stagnates, as can not then starting the power supply of AC/DC stand-by power supply.

Described illumination control circuit has MCU, and MCU is electrically connected with two control branch roads, two control branch road difference control section LED light fixture groups, and MCU controls respectively the output state of two control branch roads according to system time.

Described current foldback circuit has proportional amplifier and comparator; the proportional amplifier output connects the comparator non-inverting input; comparator output terminal is connected to the comparator non-inverting input through diode and resistance, and the comparator non-inverting input is through touch-switch ground connection.

Described sun-generated electric power signal sample circuit comprises resistance SR1, SR2, SR2' and electric capacity SC1, resistance SR2, SR2' and electric capacity SC1 parallel connection and an end ground connection, and the other end connects power supply through resistance SR1; Described stagnant chain rate is comprised of resistance SR3, SR4, SR5, adjustable resistor SRP and operational amplifier A R1 than circuit I, and sun-generated electric power signal sampling magnitude of voltage is accessed by operational amplifier A R1 reverse input end; Operational amplifier A R1 output is connected to the base stage of triode SQ1 through resistance SR6, triode SQ1 is respectively through resistance SR10, SR9, SR8 connecting triode SQ4, SQ3, SQ2 base stage, wherein triode SQ2 colelctor electrode is through optocoupler SU1 connecting triode SQ7, SQ8 base stage, triode SQ7, SQ8 emitter stage jointly through resistance SR15 to FET SQ5, SQ6 grid;

Described battery feed signal sample circuit is identical with the sun-generated electric power signal sample circuit, the chain rate that stagnates is identical than circuit I with stagnant chain rate than circuit I I, the chain rate that stagnates than circuit I I output through the base stage of resistance BR6 to triode BQ1, triode BQ1 colelctor electrode is respectively through resistance BR9, BR8 connecting triode BQ8, BQ2 base stage, wherein triode BQ2 base stage links to each other with triode SQ4 colelctor electrode, triode BQ2 colelctor electrode is through optocoupler BU1 connecting triode BQ3, BQ4 base stage, triode BQ3, BQ4 emitter stage jointly through resistance BR14 to FET BQ5, BQ6 grid;

Described triode BQ8, SQ3 colelctor electrode are connected to triode AQ1 base stage, and triode AQ1 colelctor electrode is through optocoupler AU1 connecting triode AQ3, AQ2 base stage, triode AQ3, AQ2 emitter stage jointly through resistance AR6 to FET AQ5, AQ4 grid.

The P3.5 of described MCU is connected to triode 1Q2 base stage through resistance 1R11, triode 1Q2 collector connecting transistor 1Q3 base stage, triode 1Q3 colelctor electrode connecting triode 1Q4,1Q5 base stage, triode 1Q4,1Q5 emitter stage connect the grid of FET 1Q1 jointly through resistance 1R16; Has the upper identical circuit with P3.5 on the P3.7 of described MCU.

The beneficial effects of the utility model are: the utility model adopts MPPT MPPT maximum power point tracking technology, make solar cell performance maximal efficiency, use the power supply optimization technique more can meet the actual conditions of present renewable energy utilization, simultaneously also can make the reliable and stable operation of lighting circuit, can use continuously for a long time, need not increase cost, environmental protection, can alleviate the excessive contradiction of peak power load, also can be country and save the part electric power resource, at utmost realize the requirement of ecological, environmental protective and energy-saving low-carbon.

Description of drawings

Fig. 1 is theory diagram of the present utility model.

Fig. 2 is the circuit block diagram of system controller in the utility model.

Fig. 3 is the circuit theory diagrams of reverse-connection preventing circuit among the embodiment.

Fig. 4 is the circuit theory diagrams of power supply priority control circuit among the embodiment.

Fig. 5 is the circuit theory diagrams of illumination control circuit among the embodiment.

Fig. 6 is the circuit theory diagrams of current foldback circuit among the embodiment.

Fig. 7 is the used voltage source of system controller among the embodiment.

Fig. 8 is MPPT solar charging electrical schematic diagram among the embodiment.

The specific embodiment

As shown in Figure 1, the present embodiment has solar cell 1, battery 2, the additional stand-by power supply of AC/DC stand-by power supply 3(civil power, the AC/DC24V inversion is exported) and LED light fixture group 5, and solar cell 1, battery 2 and AC/DC stand-by power supply are connected all by system controller 4 connection LED light fixture groups 5.System controller 4 comprises charge management module, power supply preferred module and lighting control module in this example, and wherein charge management module is stored in solar cell 1 unnecessary electric weight in the battery 2 when solar cell 1 is 5 power supply of LED light fixture group; The power supply preferred module switches to directly power supply port of solar cell 1 with supply access, preferentially powered by solar cell 1, when solar cell 1 because of rain, when night etc., reason can not effectively be powered, after the power supply preferred module detects signal, the port of powering switches, export power supply by 2 pairs of LED light fixtures of battery group 5, in the situation that solar cell can not effectively be powered and the batteries to store energy deficiency, the power supply preferred module is enabled AC/DC stand-by power supply 3 behind the signal after testing, switches power supply port controlling illumination output; Lighting control module is directly controlled the power output of LED light fixture group 5.

As shown in Figure 2, charge management module comprises MPPT403 in the present embodiment, and solar cell 1 connects battery 2 through MPPT403, and battery 2 also was connected to, low-voltage protection circuit 401 and temperature protection circuit 402.The power supply preferred module comprises reverse-connection preventing circuit 404 and power supply priority control circuit 405, and solar cell 1, battery 2 and AC/DC stand-by power supply 3 are connected to power supply priority control circuit 405 through reverse-connection preventing circuit 404 respectively.Described lighting control module has noncontacting switch 408; and illumination control circuit 406 and the time switch 409 of control noncontacting switch 408 break-makes; institute tells power supply priority control circuit 405 and is connected to LED light fixture group 5 through illumination control circuit 406 and noncontacting switch 408, also is connected to current foldback circuit 407 between LED light fixture group 5 and the illumination control circuit 406.

Fig. 3 is the circuit theory diagrams of reverse-connection preventing circuit 404 in the present embodiment, has FET, the grid of FET, the indirect Zener diode of source electrode, drain electrode, the indirect diode of source electrode, grounded drain, grid connecting resistance.Be input as example with solar energy, the input both positive and negative polarity accesses when correct, and through resistance SR0 and Zener diode SD0, and diode flows back into power cathode to electric current from positive pole, thereby forms forward voltage between being on the scene effect pipe SQ9 grid, source electrode, makes FET SQ9 conducting; The input both positive and negative polarity connects inverse time; because FET SQ9 and diode are in and oppositely are in cut-off state; thereby can not being on the scene effect pipe SR0 and the upper normal current that forms of Zener diode SD0; therefore FET SQ9 is in reverse blocking state, thereby has protected late-class circuit to realize anti-reverse function.

Fig. 4 is the circuit theory diagrams of power supply priority control circuit 405 among the embodiment.Described power supply priority control circuit 405 comprise sun-generated electric power signal sample circuit, battery feed signal sample circuit, the chain rate that stagnates than circuit I and stagnant chain rate than circuit I I.

One, the sun-generated electric power signal sample circuit comprises resistance SR1, SR2, SR2' and electric capacity SC1, resistance SR2, SR2' and electric capacity SC1 parallel connection and an end ground connection, and the other end connects power supply through resistance SR1; Described stagnant chain rate than circuit I by resistance SR3, SR4, SR5, adjustable resistor SRP and operational amplifier A R1(LM358) form, sun-generated electric power signal sampling magnitude of voltage is accessed by operational amplifier A R1 reverse input end; Operational amplifier A R1 output is connected to the base stage of triode SQ1 through resistance SR6, triode SQ1 is respectively through resistance SR10, SR9, SR8 connecting triode SQ4, SQ3, SQ2 base stage, wherein triode SQ2 colelctor electrode is through optocoupler SU1 connecting triode SQ7, SQ8 base stage, triode SQ7, SQ8 emitter stage jointly through resistance SR15 to FET SQ5, SQ6 grid.

When sun-generated electric power signal sampling magnitude of voltage (access of operational amplifier A R1 reverse input end) is higher than the non-inverting input of operational amplifier A R1 (solar panel can effectively be powered), operational amplifier A R1 output low level, through resistance SR6 to the base stage of triode SQ1 and make triode SQ1 be in cut-off state, and pass through resistance SR7 more respectively through resistance SR8, SR9, SR10 makes triode SQ2, SQ3, the SQ4 conducting, triode SQ2 conducting is by resistance SR12, optocoupler SU1, resistance SR13 makes triode SQ7 conducting, again by resistance SR15 to FET SQ5, the grid of SQ6, thereby give FET SQ5, produce forward bias voltage between the grid source of SQ6, thereby so that FET SQ5, the electronic switch main device of SQ6(solar cell) simultaneously conducting.Because triode SQ3, SQ4 are conductings at this moment, so that triode BQ2, AQ1 are in cut-off state, thereby can not get between grid source so that the electronic switch main device of FET BQ5, BQ6(battery) forward bias voltage and can not conducting, and the electronic switch main device of FET AQ4, AQ5(AC/DC stand-by power supply 3) the grid source between can not get forward bias voltage and can not conducting.

When sun-generated electric power signal sampling magnitude of voltage (operational amplifier A R1 reverse input end) is lower than the non-inverting input of AR1 (solar panel can not effectively be powered), operational amplifier A R1 exports high level, through resistance SR6 to the base stage of triode SQ1 and make triode SQ1 be in conducting state, cause triode SQ2, SQ3, SQ4 cut-off, thereby so that FET SQ5, SQ6 are in cut-off state, namely cut off the supply access of solar energy.

Two, the battery feed signal sample circuit is identical with the sun-generated electric power signal sample circuit, the chain rate that stagnates is identical than circuit I with stagnant chain rate than circuit I I, the chain rate that stagnates than circuit I I output through the base stage of resistance BR6 to triode BQ1, triode BQ1 colelctor electrode is respectively through resistance BR9, BR8 connecting triode BQ8, BQ2 base stage, wherein triode BQ2 base stage links to each other with triode SQ4 colelctor electrode, triode BQ2 colelctor electrode is through optocoupler BU1 connecting triode BQ3, BQ4 base stage, triode BQ3, BQ4 emitter stage jointly through resistance BR14 to FET BQ5, BQ6 grid.

When battery feed signal sampling magnitude of voltage (access of operational amplifier A R2 reverse input end) is higher than operational amplifier A R2(model LM358) non-inverting input the time (battery is effectively powered), operational amplifier A R2 output low level, through resistance BR6 to the base stage of triode BQ1 and make triode BQ1 be in cut-off state, and by resistance BR7 more respectively through resistance BR9, make triode BQ8 conducting and cause triode AQ1 cut-off; Only when triode SQ4 is in cut-off (when solar energy can not effectively be powered), by resistance BR7, BR8 so that triode BQ2 conducting, triode BQ2 conducting is by resistance BR11, optocoupler BU1, resistance BR12 makes triode BQ3 conducting, again by the grid of resistance BR14 to FET BQ5, BQ6, thereby produce forward bias voltage between the grid source of FET BQ5, BQ6 of giving, and so that the electronic switch main device of FET BQ5, BQ6(batteries) simultaneously conducting.

When battery feed signal sampling magnitude of voltage (operational amplifier A R2 reverse input end) is lower than the non-inverting input of operational amplifier A R2 (battery can not effectively be powered), operational amplifier A R2 exports high level, through resistance BR6 to the base stage of triode BQ1 and make triode BQ1 be in conducting state, cause triode BQ2, BQ8 cut-off, thereby so that FET BQ5, BQ6 are in cut-off state, namely cut off the supply access of battery.

Three, triode BQ8, SQ3 colelctor electrode are connected to triode AQ1 base stage in this example, and triode AQ1 colelctor electrode is through optocoupler AU1 connecting triode AQ3, AQ2 base stage, triode AQ3, AQ2 emitter stage jointly through resistance AR6 to FET AQ5, AQ4 grid.

Only when triode BQ8, SQ3 end simultaneously (when solar cell and battery all can not effectively be powered), just make triode AQ1 conducting through resistance AR1, again through resistance AR3, optocoupler AU1, resistance AR4, triode AQ2 and the resistance AR6 grid to FET AQ4, AQ5, thereby produce forward bias voltage between the grid source of FET AQ4, AQ5 of giving, so that the electronic switch main device of FET AQ4, AQ5(accessory power supply group) simultaneously conducting.

As shown in Figure 5, the circuit theory diagrams of illumination control circuit 406 in the present embodiment.Illumination control circuit 406 has MCU(model AT89C2051), MCU is electrically connected with two control branch roads, two control branch road difference control section LED light fixture groups 5.The P3.5 of MCU is connected to triode 1Q2 base stage through resistance 1R11, triode 1Q2 collector connecting transistor 1Q3 base stage, triode 1Q3 colelctor electrode connecting triode 1Q4,1Q5 base stage, triode 1Q4,1Q5 emitter stage connect the grid (No. 1 tunnel) of FET 1Q1 jointly through resistance 1R16; Has the upper identical circuit (No. 2 tunnels) with P3.5 on the P3.7 of MCU.

MCU can adjust power output according to the needs of lighting environment, rare people is movable when night, illumination can enter power save mode, reduces power output, and system takes the power output that reduces by half, enter certain period, issue the power output instruction and controlled at output port that reduces by half by MCU, and keep this half-power output until next recovers period, the output control and management is adjusted into the total power output state, can effectively prolong the power-on time of battery like this, and reach the effect of energy-saving low-carbon.

In this example, MCU controls the output state of No. 1 road and No. 2 according to system time:

When system time when 06:00---22:00 is interval, No. 1 road and 2 tunnel outputs (conducting);

When system time when 22:00---02:00 is interval, No. 1 tunnel output (conducting), No. 2 (cut-off) closed on the tunnel;

When system time when 02:00---06:00 is interval, No. 2 tunnel outputs (conducting), No. 1 (cut-off) closed on the tunnel.

No. 1 tunnel output: when the I/O port output high level of the P3.5 of MCU, make triode 1Q2 conducting through resistance 1R11,1R12, then so that triode 1Q3 cut-off, through resistance 1R14,1R15 so that triode 1Q4 conducting, triode 1Q5 cut-off, again through resistance 1R16, the 1R17 grid to FET 1Q1, thereby make the complete conducting of FET 1Q1 so that obtain the voltage of forward between the grid source electrode of FET 1Q1; When the I/O port output low level of the P3.5 of MCU, then FET 1Q1 is in cut-off state.

No. 2 tunnels output: when the I/O port output high level of the P3.7 of MCU, make triode 2Q2 conducting through resistance 2R11,2R12, then so that triode 2Q3 cut-off, through resistance 2R14,2R15 so that triode 2Q4 conducting, triode 2Q5 cut-off, again through resistance 2R16, the 2R17 grid to FET 2Q1, thereby make the complete conducting of FET 2Q1 so that obtain the voltage of forward between the grid source electrode of FET 2Q1; When the I/O port output low level of the P3.7 of MCU, then FET 2Q1 is in cut-off state.

For preventing that LED light fixture group 5 from affecting security of system when breaking down, all be connected to current foldback circuit 407(and see Fig. 6 on two control branch roads of illumination control circuit 406).

Pass by the stream holding circuit No. 1: when flowing through certain electric current of FET 1QS; can produce the magnitude of voltage of answering between the drain-source of being on the scene effect pipe 1QS; after the amplification of the proportional amplifier that is comprised of resistance 1R1,1R3 and operational amplifier 1U1A, the non-inverting input and the reference data that pass to comparator 1U1B through resistance 1R4,1R5 dividing potential drop again compare processing through resistance 1R1.When electric current serious offense setting value, through comparator 1U1B output high level behind reference data voltage corresponding to the voltage signal serious offense of the correspondence of having amplified, pass to again the non-inverting input of comparator 1U1B through diode 1D2 and resistance 1R8, force the non-inverting input of comparator 1U1B to be higher than the reverse input end of comparator 1U1B always, thereby realize overcurrent self-locking function; In case being in self-locking state can be by coming release by touch-switch S1.Pass by stream holding circuit principle for No. 2 with No. 1 tunnel.

Fig. 7 is the used voltage source of system controller among the embodiment.Solar cell 1, battery 2 and 3 accesses of AC/DC stand-by power supply and changing transfer the used voltage source of system controller 4 to.By voltage-stablizer PU3, PU4(78LXX) and isolate DC/DC power supply (PKV3321) generation 12V, 5V voltage.The circuit that is comprised of the TL431 chip produces 2.5V voltage.

Solar cell array design in this example

Solar module serial number Ns:

Ns=UR/Uoc=(Uf+UD+Uc)/Uoc

In the formula: UR is solar cell array output minimum voltage; Uoc is the optimum operating voltage of solar module; Uf is the battery float charge voltage; UD is diode drop; The pressure drop that UC causes for other factors.

Solar module number Np in parallel:

Np=(Bcb+Nw×QL)/(Qp×Nw)

In the formula: the accumulator capacity of Bcb for needing to replenish; The shortest interval fate between two groups the longest of Nw are overcast and rainy continuously; Qp is the solar module daily generation.

The solar cell array power P:

P=Po×Ns×Np(W)

In the formula: Po is the rated power of battery component.Ns is serial number, and Np is number in parallel.

Battery group capacity design in the present embodiment

The capacity of battery is to guaranteeing that power supply is very important continuously.The deficiency of square formation generated energy and superfluous value are one of foundations of determining accumulator capacity.Accumulator capacity BC computing formula is:

BC=A×QL×NL×TO/CC(Ah)

In the formula: A is safety coefficient, gets between 1.1~1.4; QL is the per day power consumption of load, for operating current multiply by a day work hourage; NL is the longest continuous overcast and rainy days; TO is temperature correction coefficient, is generally getting 1 more than 0 ℃; CC is the battery discharging degree of depth.

MPPT (MPPT maximum power point tracking) controller refers to that namely controller can detect the generating voltage of solar panels in real time, and follows the trail of ceiling voltage current value (VI), make system with the highest efficient to charge in batteries.Because the maximum power point (mpp) of photovoltaic cell is with light intensity and variations in temperature.The tracking of maximum power point is actually one from searching process.By the detection to photovoltaic cell current output voltage and electric current, obtain current the output power from photovoltaic cells, compare with the previous moment photovoltaic cell power of having stored again, give up little depositing greatly, detect again, compare again.So ceaselessly go round and begin again, photovoltaic cell dynamically is operated on the maximum power point.

Used MPPT principle in the present embodiment: because photovoltaic cell component is subject to the impact of the many factors such as light intensity, temperature, angle of incidence of sunlight, during its output voltage output current and internal resistance are in and do not stop changing, MPPT maximum power point tracking is by the detection to photovoltaic cell current output voltage and electric current, obtain current charge power after multiplying each other, compare with the charge power of previous moment, regulate the dutycycle of PWM, thereby make photovoltaic cell always work in maximum power point.

Be illustrated in figure 8 as MPPT solar charging electrical schematic diagram.Microcontroller employing MC68 is routine microprocessor (the actual MC68HC08SR12 of employing here) among the figure, uses the A/D module through the electric current and voltage sample circuit, thus the control end PWM dutycycle of regulating T, the maximum power output of realization photovoltaic cell.

Claims (10)

1. solar powered energy efficient lighting system, have solar cell (1), battery (2), AC/DC stand-by power supply (3) and LED light fixture group (5), it is characterized in that: described solar cell (1), battery (2) are connected 3 with the AC/DC stand-by power supply) all connect LED light fixture group (5) through system controller (4), described system controller (4) comprising:
Charge management module, control solar cell (1) are battery (2) charging, when solar cell (1) directly is LED light fixture group (5) power supply, unnecessary electric weight are stored in the battery (2);
The power supply preferred module, be used between solar cell (1), battery (2) and AC/DC stand-by power supply (3) three, switching the power supply to LED light fixture group (5) power supply, solar cell (1) power supply is preferential, secondly powered by battery (2), in the time of both can't effectively powering, start AC/DC stand-by power supply (3) power supply;
Lighting control module is used for control LED light fixture group (5) power output.
2. solar powered energy efficient lighting system according to claim 1; it is characterized in that: described charge management module comprises MPPT(403); solar cell (1) is through MPPT(403) connect battery (2), battery (2) also was connected to, low-voltage protection circuit (401) and temperature protection circuit (402).
3. solar powered energy efficient lighting system according to claim 1, it is characterized in that: described power supply preferred module comprises reverse-connection preventing circuit (404) and power supply priority control circuit (405), and solar cell (1), battery (2) and AC/DC stand-by power supply (3) are connected to power supply priority control circuit (405) through reverse-connection preventing circuit (404) respectively.
4. solar powered energy efficient lighting system according to claim 1; it is characterized in that: described lighting control module has noncontacting switch (408); and illumination control circuit (406) and the time switch (409) of control noncontacting switch (408) break-make; described power supply priority control circuit (405) is connected to LED light fixture group (5) through illumination control circuit (406) and noncontacting switch (408), also is connected to current foldback circuit (407) between LED light fixture group (5) and the illumination control circuit (406).
5. solar powered energy efficient lighting system according to claim 3, it is characterized in that: described reverse-connection preventing circuit (404) has FET, the grid of FET, the indirect Zener diode of source electrode, drain electrode, the indirect diode of source electrode, source ground, the grid connecting resistance.
6. solar powered energy efficient lighting system according to claim 3, it is characterized in that: described power supply priority control circuit (405) comprises the sun-generated electric power signal sample circuit, the battery feed signal sample circuit, the chain rate that stagnates than circuit I and stagnant chain rate than circuit I I, sun-generated electric power signal sample circuit sampling solar cell (1) power supply signal, chain rate judges whether and can effectively power than circuit I through stagnating, such as starting storage battery power signal sampling circuit sampling battery (2) power supply signal then, judge whether and effectively to power than circuit I I through the chain rate that stagnates, as can not then starting AC/DC stand-by power supply (3) power supply.
7. solar powered energy efficient lighting system according to claim 4, it is characterized in that: described illumination control circuit (406) has MCU, MCU is electrically connected with two control branch roads, article two, the control branch road is distinguished control section LED light fixture group (5), and MCU controls respectively the output state of two control branch roads according to system time.
8. solar powered energy efficient lighting system according to claim 4; it is characterized in that: described current foldback circuit (407) has proportional amplifier and comparator; the proportional amplifier output connects the comparator non-inverting input; comparator output terminal is connected to the comparator non-inverting input through diode and resistance, and the comparator non-inverting input is through touch-switch ground connection.
9. solar powered energy efficient lighting system according to claim 6 is characterized in that:
Described sun-generated electric power signal sample circuit comprises resistance SR1, SR2, SR2' and electric capacity SC1, resistance SR2, SR2' and electric capacity SC1 parallel connection and an end ground connection, and the other end connects power supply through resistance SR1; Described stagnant chain rate is comprised of resistance SR3, SR4, SR5, adjustable resistor SRP and operational amplifier A R1 than circuit I, and sun-generated electric power signal sampling magnitude of voltage is accessed by operational amplifier A R1 reverse input end; Operational amplifier A R1 output is connected to the base stage of triode SQ1 through resistance SR6, triode SQ1 is respectively through resistance SR10, SR9, SR8 connecting triode SQ4, SQ3, SQ2 base stage, wherein triode SQ2 colelctor electrode is through optocoupler SU1 connecting triode SQ7, SQ8 base stage, triode SQ7, SQ8 emitter stage jointly through resistance SR15 to FET SQ5, SQ6 grid;
Described battery feed signal sample circuit is identical with the sun-generated electric power signal sample circuit, the chain rate that stagnates is identical than circuit I with stagnant chain rate than circuit I I, the chain rate that stagnates than circuit I I output through the base stage of resistance BR6 to triode BQ1, triode BQ1 colelctor electrode is respectively through resistance BR9, BR8 connecting triode BQ8, BQ2 base stage, wherein triode BQ2 base stage links to each other with triode SQ4 colelctor electrode, triode BQ2 colelctor electrode is through optocoupler BU1 connecting triode BQ3, BQ4 base stage, triode BQ3, BQ4 emitter stage jointly through resistance BR14 to FET BQ5, BQ6 grid;
Described triode BQ8, SQ3 colelctor electrode are connected to triode AQ1 base stage, and triode AQ1 colelctor electrode is through optocoupler AU1 connecting triode AQ3, AQ2 base stage, triode AQ3, AQ2 emitter stage jointly through resistance AR6 to FET AQ5, AQ4 grid.
10. solar powered energy efficient lighting system according to claim 7, it is characterized in that: the P3.5 of described MCU is connected to triode 1Q2 base stage through resistance 1R11, triode 1Q2 collector connecting transistor 1Q3 base stage, triode 1Q3 colelctor electrode connecting triode 1Q4,1Q5 base stage, triode 1Q4,1Q5 emitter stage connect the grid of FET 1Q1 jointly through resistance 1R16; Has the upper identical circuit with P3.5 on the P3.7 of described MCU.
CN201220576302XU 2012-11-02 2012-11-02 Solar energy-saving illuminating system CN202902134U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102913839A (en) * 2012-11-02 2013-02-06 浙江省能源与核技术应用研究院 Solar power supplied energy-saving illumination system
CN104882846A (en) * 2014-02-28 2015-09-02 北京谊安医疗系统股份有限公司 Protection apparatus used for anaesthesia machine and anaesthesia machine with protection apparatus
CN106023827A (en) * 2016-07-08 2016-10-12 东北林业大学 String light type LED remote-control variable solar traffic sign
WO2017004800A1 (en) * 2015-07-08 2017-01-12 罗明镜 Household solar lighting system
CN106972454A (en) * 2017-04-17 2017-07-21 顺丰科技有限公司 High voltage-small current current-limiting circuit, current-limiting protection module and unmanned delivery's equipment
CN106972455A (en) * 2017-04-17 2017-07-21 顺丰科技有限公司 High voltage-small current current-limiting circuit, current-limiting protection module and unmanned delivery's equipment

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102913839A (en) * 2012-11-02 2013-02-06 浙江省能源与核技术应用研究院 Solar power supplied energy-saving illumination system
CN102913839B (en) * 2012-11-02 2015-02-25 浙江省能源与核技术应用研究院 Solar power supplied energy-saving illumination system
CN104882846A (en) * 2014-02-28 2015-09-02 北京谊安医疗系统股份有限公司 Protection apparatus used for anaesthesia machine and anaesthesia machine with protection apparatus
WO2017004800A1 (en) * 2015-07-08 2017-01-12 罗明镜 Household solar lighting system
CN106023827A (en) * 2016-07-08 2016-10-12 东北林业大学 String light type LED remote-control variable solar traffic sign
CN106972454A (en) * 2017-04-17 2017-07-21 顺丰科技有限公司 High voltage-small current current-limiting circuit, current-limiting protection module and unmanned delivery's equipment
CN106972455A (en) * 2017-04-17 2017-07-21 顺丰科技有限公司 High voltage-small current current-limiting circuit, current-limiting protection module and unmanned delivery's equipment

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