CN104283260A - Network type MPPT solar charging controller and control method thereof - Google Patents
Network type MPPT solar charging controller and control method thereof Download PDFInfo
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- CN104283260A CN104283260A CN201410512736.7A CN201410512736A CN104283260A CN 104283260 A CN104283260 A CN 104283260A CN 201410512736 A CN201410512736 A CN 201410512736A CN 104283260 A CN104283260 A CN 104283260A
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The invention discloses a network type MPPT solar charging controller and a control method thereof. The controller comprises a DSP main control module, a multi-path half-bridge driver module, a multi-phase synchronous rectification module, a voltage/current sampling module, an inner 485 communication module, an input/output module and a system power supply module supplying power to all the modules. One end of the multi-path half-bridge driver module is connected with the output end of the DSP main control module, the other end of the multi-path half-bridge driver module is connected with the multi-phase synchronous rectification module, the output end of the multi-phase synchronous rectification module is connected with the voltage/current sampling module, the output end of the voltage/current sampling module is connected with the input end of the DSP main control module, and the DSP main control module is connected with the input/output module through the inner 485 communication module.
Description
Technical field
The present invention relates to a kind of network-type MPPT solar charging controller and control method thereof, belong to grid-connected power generation system control technology field.
Background technology
Solar charging controller major part in the market adopts tandem type PWM charging modes, owing to not being with inductance Charge Management, so when photovoltaic battery panel output current is large, cannot realize carrying out current limliting to charge in batteries, MPPT maximum power point tracking cannot be realized, owing to there is no suitable communication interface, networking control can not be carried out.
In view of this, the present inventor studies this, and develop a kind of network-type MPPT solar charging controller and control method thereof specially, this case produces thus.
Summary of the invention
The object of this invention is to provide a kind of type MPPT solar charging controller Network Based and control method thereof, larger power stage can be realized, there is compact conformation, easy for installation simultaneously, do not need the features such as complicated field wiring.
To achieve these goals, solution of the present invention is:
Network-type MPPT solar charging controller, comprise DSP main control module, multichannel half-bridge driver module, leggy synchronous rectification module, voltage/current sampling module, inner 485 communication modules, input/output module, and be respectively the system power supply module that above-mentioned modules powers, wherein, described multichannel half-bridge driver module one end is connected with the output of DSP main control module, the other end with leggy synchronous rectification module be connected, the output of leggy synchronous rectification module is connected with voltage/current sampling module, the output of voltage/current sampling module is connected with the input of DSP main control module, described DSP main control module is connected with input/output module by inner 485 communication modules.
As preferably, described input/output module comprises the ARM that is connected with DSP main control module by inner 485 communication modules from control circuit, and the button inputting circuits, liquid crystal display circuit and the radio communication circuit that are connected from control circuit with ARM.
As preferably, described DSP main control module adopts the DSP28035 chip of TI company, and DSP28035 carries abundant PWM function, exports, realize timesharing charged in parallel for misphase.
As preferably, described multichannel half-bridge driver module adopts the IR2110 driving chip of IR company, realizes half-bridge driven by the mode of bootstrapping, thus does not need insulating power supply to realize driving.
As preferably, described leggy synchronous rectification module comprises several MOSFET be connected with multichannel half-bridge driver module and manages, and the inductance of to connect with MOSFET pipe, multiple MOSFET pipe composition half-bridge, after multichannel half-bridge driver module misphase driver output, converged by inductance again, realize the timesharing conveying of energy, realize larger power output.Described MOSFET pipe can adopt the model of IR company be IRFB4110 MOSFET pipe.
As preferably, described voltage/current sampling module comprises several operational amplifier be connected with leggy synchronous rectification module, and the divider resistance to be connected with operational amplifier and sampling resistor, real-time sampling battery tension and leggy synchronous rectification module multichannel charging current, and the information of voltage collected and current information are fed back to DSP main control module, realize maximum MPPT and follow the tracks of.
As preferably, inner 485 communication modules adopt the max485 chip of maxim companies, realize ARM and read the Charge Management function setting of DSP main control module and real time information from control module.
As preferably, ARM adopts the stm32f103cbt6 of st company from control circuit.Stm32f103cbt6 adopts cortex-m3 kernel, and run power consumption very low, dominant frequency is up to 72M, and cost performance is high.
As preferably, button inputting circuits adopts the button of 6*6mm, can realize user and input setting.
As preferably, liquid crystal display circuit adopts OCMJ2X8C Liquid Crystal Module, and parallel port communication, low in energy consumption, carry Chinese word library, cost performance is high.
As preferably, the wireless data sending chip SI4432 worked in lower than 1GHz frequency range that radio communication circuit adopts Silabs to produce, networking based on SI4432 adopts host-guest architecture, multi-channel transmission technology, realizes the setting of supervision to charger states and charger operation pattern.
As preferably, described system power supply module adopts DC-DC buck control chip.
The control method of above-mentioned network-type MPPT solar charging controller, comprises the steps:
1) first, user inputs dependent instruction by button inputting circuits according to demand, and is transferred to DSP main control module by ARM from control circuit and inner 485 communication modules;
2) then, DSP main control module produces the PWM waveform of multichannel misphase, output to multichannel half-bridge driver module, the driving chip of multichannel half-bridge driver module drives the multichannel half-bridge MOSFET of leggy synchronous rectification module to manage, realize stagger parallel connection, converged by inductance again, realize the timesharing conveying of energy, reach larger power output;
3) DSP main control module passes through every road charging current of voltage/current sampling module Real-time Collection battery tension and leggy synchronous rectification module simultaneously, and realize maximum MPPT and follow the tracks of: the maximal power tracing algorithm of DSP main control module adopts variable step method of perturbation, large step-length is adopted when output point is away from maximum power point, when output point is close to adopting little step-length during maximum power point, when collecting output current from when diminishing greatly, just thinking and having traced into peak power output point;
4) dependent instruction sends to ARM from control circuit by inner 485 communication modules by DSP main control module again, carry out showing and communicating finally by LCD MODULE and/or wireless communication module, realize setting parameter and the digital independent of DSP main control module, and the networking function of wireless telecommunications.
Above-mentioned network-type MPPT solar charging controller and control method charging thereof adopt DC-DC mode, by carrying out stagger parallel connection to multiple synchronous buck circuit, realize the efficient Charge Management to storage battery, compared to single-phase buck circuit, stagger parallel connection can realize larger power stage, effectively can reduce the volume of inductance, leggy synchronous rectification module efficiency is up to 98% simultaneously; Realize setting parameter, digital independent, wireless network monitoring by input/output module simultaneously, do not need complicated field wiring.
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the network-type MPPT solar charging controller module frame chart of the present embodiment;
Fig. 2 is the network-type MPPT solar charging controller supply module circuit diagram of the present embodiment;
Fig. 3 is the network-type MPPT solar charging controller DSP main control module circuit diagram of the present embodiment;
Fig. 4 is the multichannel half-bridge driver module circuit diagram of the present embodiment;
Fig. 5 is the leggy synchronous rectification module circuit diagram of the present embodiment;
Fig. 6 is the voltage/current sampling module circuit diagram of the present embodiment;
Fig. 7 is the inside 485 communication module circuit diagram of the present embodiment;
Fig. 8 is that the ARM of the present embodiment is from control module circuit diagram;
Fig. 9 is the button inputting circuits schematic diagram of the present embodiment;
Figure 10 is the liquid crystal display circuit schematic diagram of the present embodiment;
Figure 11 is the radio communication circuit schematic diagram of the present embodiment.
Embodiment
As shown in Figure 1, network-type MPPT solar charging controller, comprise DSP main control module 1, multichannel half-bridge driver module 2, leggy synchronous rectification module 3, voltage/current sampling module 4, inner 485 communication modules 5, input/output module 6, and be respectively the system power supply module that above-mentioned modules powers, wherein, described multichannel half-bridge driver module 2 one end is connected with the output of DSP main control module 1, the other end with leggy synchronous rectification module 3 be connected, the output of leggy synchronous rectification module 3 is connected with voltage/current sampling module 4, the output of voltage/current sampling module 4 is connected with the input of DSP main control module 1, described DSP main control module 1 is connected with input/output module 6 by inner 485 communication modules 5.Described input/output module 6 comprises the ARM that is connected with DSP main control module 1 by inner 485 communication modules 5 from control circuit 61, and the button inputting circuits 62, liquid crystal display circuit 63 and the radio communication circuit 64 that are connected from control circuit 61 with ARM.Network-type MPPT solar charging controller described in the present embodiment is 3 tunnels, also can be adjusted to 2 tunnels, 4 tunnels, 5 tunnels, 6 tunnels etc. according to demand.
As shown in Figure 2, system power supply module adopts L4971 BUCK controller, can realize 12V voltage stabilizing, then realizes 12v to convert-12v to by buck-boost controller mc34063, by ETA2821 buck controller, 12v is converted to 5v again, then by the voltage stabilizing of ldo chip to 3.3v.
As shown in Figure 3, described DSP main control module 1 adopts model to be the chip of dsp28035, DSP main control module is mainly used in output 6 road misphase pwm signal to multichannel half-bridge driver module 2, and 12 ADC then by carrying realize the sampling feedback of voltage and current.
As shown in Figure 4, multichannel half-bridge driver module 2 principle is that the 6 road pwm signals that first level transfer chip lvx3245 receives the 3.3v of DSP main control module input are converted to 5v level, the 6 road pwm signals of 5v carry out signal amplification by the IR2110 half-bridge driven chip of IR company, level transfer chip lvx3245 three IR2110 in parallel, every road misphase 120 degree, signal amplifies the timesharing conveying that rear drive leggy rectification module 3 realizes energy.
As shown in Figure 5, leggy synchronous rectification module 3 adopts the IRFB4110 MOSFET pipe of IR company to form 3 road half-bridges, after 3 road half-bridge driver misphase driver outputs, pass through 20A, 3 inductance of 100UH converge and output to storage battery, in order to make battery tension keep stable, output capacitance adopts the electrochemical capacitor of 1000uf/100v.
As shown in Figure 6, electric current and voltage sampling module 4 Real-time Collection battery tension, and three tunnel charging currents of leggy synchronous rectification module 3, and the voltage/current signals collected is fed back to DSP main control module, realize maximum MPPT and follow the tracks of.In order to make sampling more accurate, adopt OP2117 high accuracy, the high-grade operational amplifier of low imbalance realizes the detection of voltage and current, the conditioning of voltage and current signal is realized respectively, voltage and current signal condition to the suitable input range of DSP main control module by divider resistance and sampling resistor.
As shown in Figure 7,485 communication modules 5 adopt the max485 chip of maxim company, realize ARM and read the Charge Management function setting of DSP main control module and real time information from control module.
As shown in Figure 8, ARM adopts the stm32f103cbt6 of st company from control module, and Stm32f103cbt6 adopts cortex-m3 kernel, and run power consumption very low, dominant frequency is up to 72M, and cost performance is high.
As shown in Figure 9, keyboard input module adopts the button of 6*6mm, can realize user and input setting.
As shown in Figure 10, LCD MODULE adopts OCMJ2X8C Liquid Crystal Module, and parallel port communication, low in energy consumption, carry Chinese word library, cost performance is high.
As shown in figure 11, wireless communication module adopts SI4432 wireless communication module, be operated in 433Mhz, realize wireless networking, communication distance reaches 1000 meters, and regional area can converge to server by gprs networking, achieves the networking of low cost, avoid the high cost that wired networking brings, be not easy the drawback of layout.
The control method of above-mentioned network-type MPPT solar charging controller, comprises the steps:
1) first, user inputs dependent instruction by button inputting circuits according to demand, and is transferred to DSP main control module by ARM from control circuit and inner 485 communication modules;
2) then, DSP main control module produces the PWM waveform of multichannel misphase, output to multichannel half-bridge driver module, the driving chip of multichannel half-bridge driver module drives the multichannel half-bridge MOSFET of leggy synchronous rectification module to manage, realize stagger parallel connection, converged by inductance again, realize the timesharing conveying of energy, reach larger power output;
3) DSP main control module passes through every road charging current of voltage/current sampling module Real-time Collection battery tension and leggy synchronous rectification module simultaneously, and realize maximum MPPT and follow the tracks of: the maximal power tracing algorithm of DSP main control module adopts variable step method of perturbation, large step-length is adopted when output point is away from maximum power point, when output point is close to adopting little step-length during maximum power point, when collecting output current from when diminishing greatly, just thinking and having traced into peak power output point;
4) dependent instruction sends to ARM from control circuit by inner 485 communication modules by DSP main control module again, carry out showing and communicating finally by LCD MODULE and/or wireless communication module, realize setting parameter and the digital independent of DSP main control module, and the networking function of wireless telecommunications.
Above-mentioned network-type MPPT solar charging controller charging adopts DC-DC mode, by carrying out stagger parallel connection to multiple synchronous buck circuit, realize the efficient Charge Management to storage battery, compared to single-phase buck circuit, stagger parallel connection can realize larger power stage, effectively can reduce the volume of inductance, leggy synchronous rectification module efficiency is up to 98% simultaneously; Realize setting parameter, digital independent by input/output module simultaneously, owing to have employed wireless network monitoring, so can human cost be saved, can by the data of controller be transferred to server by gateway, can the state of supervisory control device whenever and wherever possible, particularly have more advantage in depopulated zone.
Above-described embodiment and graphic and non-limiting product form of the present invention and style, any person of an ordinary skill in the technical field, to its suitable change done or modification, all should be considered as not departing from patent category of the present invention.
Claims (10)
1. network-type MPPT solar charging controller, it is characterized in that: comprise DSP main control module, multichannel half-bridge driver module, leggy synchronous rectification module, voltage/current sampling module, inner 485 communication modules, input/output module, and be respectively the system power supply module that above-mentioned modules powers, wherein, described multichannel half-bridge driver module one end is connected with the output of DSP main control module, the other end with leggy synchronous rectification module be connected, the output of leggy synchronous rectification module is connected with voltage/current sampling module, the output of voltage/current sampling module is connected with the input of DSP main control module, described DSP main control module is connected with input/output module by inner 485 communication modules.
2. network-type MPPT solar charging controller as claimed in claim 1, it is characterized in that: described input/output module comprises the ARM that is connected with DSP main control module by inner 485 communication modules from control circuit, and the button inputting circuits, liquid crystal display circuit and the radio communication circuit that are connected from control circuit with ARM.
3. network-type MPPT solar charging controller as claimed in claim 1, is characterized in that: described DSP main control module adopts the DSP28035 chip of TI company.
4. network-type MPPT solar charging controller as claimed in claim 1, is characterized in that: described multichannel half-bridge driver module adopts the IR2110 driving chip of IR company, realizes half-bridge driven by the mode of bootstrapping.
5. network-type MPPT solar charging controller as claimed in claim 1, it is characterized in that: described leggy synchronous rectification module comprises several MOSFET be connected with multichannel half-bridge driver module and manages, and the inductance of to connect with MOSFET pipe, multiple MOSFET pipe composition half-bridge, after multichannel half-bridge driver module misphase driver output, converged by inductance again, realize the timesharing conveying of energy, realize larger power output.
6. network-type MPPT solar charging controller as claimed in claim 1, it is characterized in that: described voltage/current sampling module comprises several operational amplifier be connected with leggy synchronous rectification module, and the divider resistance to be connected with operational amplifier and sampling resistor, real-time sampling battery tension and leggy synchronous rectification module multichannel charging current, and the information of voltage collected and current information are fed back to DSP main control module, realize maximum MPPT and follow the tracks of.
7. network-type MPPT solar charging controller as claimed in claim 2, it is characterized in that: inner 485 communication modules adopt the max485 chip of maxim company, realize ARM and from control module, the Charge Management function setting of DSP main control module and real time information are read.
8. network-type MPPT solar charging controller as claimed in claim 2, is characterized in that: ARM adopts the stm32f103cbt6 of st company from control circuit; Button inputting circuits adopts the button of 6*6mm, can realize user and input setting; Liquid crystal display circuit adopts OCMJ2X8C Liquid Crystal Module; The wireless data sending chip SI4432 worked in lower than 1GHz frequency range that radio communication circuit adopts Silabs to produce.
9. network-type MPPT solar charging controller as claimed in claim 1, is characterized in that: described system power supply module adopts DC-DC buck control chip.
10. the control method of network-type MPPT solar charging controller as claimed in claim 1, comprises the steps:
1) first, user inputs dependent instruction by button inputting circuits according to demand, and is transferred to DSP main control module by ARM from control circuit and inner 485 communication modules;
2) then, DSP main control module produces the PWM waveform of multichannel misphase, output to multichannel half-bridge driver module, the driving chip of multichannel half-bridge driver module drives the multichannel half-bridge MOSFET of leggy synchronous rectification module to manage, realize stagger parallel connection, converged by inductance again, realize the timesharing conveying of energy, reach larger power output;
3) DSP main control module passes through every road charging current of voltage/current sampling module Real-time Collection battery tension and leggy synchronous rectification module simultaneously, and realize maximum MPPT and follow the tracks of: the maximal power tracing algorithm of DSP main control module adopts variable step method of perturbation, large step-length is adopted when output point is away from maximum power point, when output point is close to adopting little step-length during maximum power point, when collecting output current from when diminishing greatly, just thinking and having traced into peak power output point;
4) dependent instruction sends to ARM from control circuit by inner 485 communication modules by DSP main control module again, carry out showing and communicating finally by LCD MODULE and/or wireless communication module, realize setting parameter and the digital independent of DSP main control module, and the networking function of wireless telecommunications.
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| CN105553074A (en) * | 2015-12-25 | 2016-05-04 | 上海工程技术大学 | DSP and ARM dual-core-based solar photovoltaic intelligent charger human-computer interaction system |
| CN106329626A (en) * | 2016-08-31 | 2017-01-11 | 浙江腾腾电气有限公司 | MPPT (Maximum Power Point Tracking) photovoltaic charging control system |
| CN109617213A (en) * | 2018-12-14 | 2019-04-12 | 杭州电子科技大学 | A kind of MPPT solar charging discharging controller |
| CN112769183A (en) * | 2020-12-31 | 2021-05-07 | 上海移为通信技术股份有限公司 | Charging method, charging device, electronic equipment and storage medium |
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