Solar DC electricity power supply power station
Technical field
The present invention relates to application of solar, especially, relate to a kind of solar DC electricity power supply power station.
Background technology
Solar power generation is the device utilizing battery component solar energy directly to be changed into electric energy.In the area of vast power grid stability deficiency, this device can be embodied as user's illumination and life power supply easily.
Traditional solar power system mainly comprises: the compositions such as solar-energy photo-voltaic cell, solar power generation controller, storage battery, inverter, user and lighting load.Wherein, solar-energy photo-voltaic cell and storage battery are power-supply system, and controller and inverter are Control protection system, and load is system terminal.Particularly, solar power generation controller can carry out regulation and control to electricity, on the one hand the energy after adjustment is sent to DC load or AC load, on the other hand unnecessary energy is sent to batteries to store, when electricity can not meet load needs, controller is sent to load the electric energy of storage battery again.After storage battery is full of electricity, controller will control storage battery and do not overcharged.When the electric energy stored by storage battery discharges, controller will control storage battery not by overdischarge, protection storage battery.The task of batteries is energy storage, so that in night or overcast and rainy proof load electricity consumption.Inverter is responsible for direct current being converted to alternating current, for AC load.
Existing traditional user's lighting load continues to use alternating current illumination always, but there are some researches show that the eyesight of the stroboscopic of alternating current on people causes very large impact, particularly easily causes people's hypometropia.DC lighting load is adopted effectively to solve the problem, but the continuous stability of the DC power supply that solar power generation provides has problems, than as in the night or continuous rainy weather, the excessive electricity consumption of storage battery, solar power generation controller is stopped power supply for avoiding the electric discharge of storage battery many degree can control storage battery, the feeding of terminal DC power supply, affects user and uses.
On the other hand, for the rich energy output of solar energy, existing way is that alternating current is incorporated in supply network and sells Utilities Electric Co. by above-mentioned rich electricity inversion, and the use of normal household electrical appliance still obtains AC power from supply network.Sending out DC inverter at this sun the subject of knowledge and the object of knowledge is that alternating current is incorporated in the process of supply network, certainly will cause the energy loss of solar power generation, and user can not effectively utilize solar power generation to reduce household electricity cost.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of solar DC electricity power supply power station, can mutually addedly use civil power and solar power generation to be charge in batteries, make storage battery be that DC load carries out low-voltage DC supply constantly.
In order to solve the problem, provide a kind of solar DC electricity power supply power station on the one hand, comprising: solar-energy photo-voltaic cell, storage battery, solar power generation controller, complementary charge controller, the commercial power charged module for described charge in batteries, battery discharging module, DC load; Wherein, described solar power generation controller carries out regulation and control to the electric energy that described solar-energy photo-voltaic cell is changed, on the one hand the energy after adjustment is sent to DC load, on the other hand unnecessary energy is sent to storage battery to store, when solar-energy photo-voltaic cell electricity can not meet described DC load needs, controller controls described battery discharging module and the electric energy of described battery stores is exported to described DC load; Described complementary charge controller is used for, when commercial power charged module described in storage battery quantity not sufficient time control system is described charge in batteries, making described storage battery carry out direct current supply for described DC load sustainably.
Optionally, described commercial power charged module is specially a direct-current switch power supply, the input of described direct-current switch power supply connects the output of mains-supplied circuit and complementary charge controller respectively, and the output of described direct-current switch power supply connects the charging end of described storage battery.
Optionally, described complementary charge controller specifically comprises: a relay, a hysteresis comparator and provide the linear voltage stabilization voltage source of reference voltage stabilizing source for described hysteresis comparator; Wherein, the input of hysteresis comparator is connected with the both positive and negative polarity of storage battery, and the output of hysteresis comparator is connected with the input of relay, and the output of relay is connected with the input of described Switching Power Supply; When hysteresis comparator detects the terminal voltage of described storage battery lower than preset voltage lower threshold, relay closes, connects described Switching Power Supply and utilizes mains-supplied circuit to be described charge in batteries; Under commercial power charged pattern, when hysteresis comparator detects the terminal voltage of described storage battery higher than preset voltage upper limit threshold, open relay, cut off the connection of described Switching Power Supply and mains-supplied circuit.
Compared with prior art, a technical scheme in technique scheme has the following advantages or beneficial effect: solar DC provided by the invention electricity power supply power station comprises solar power generation part and commercial power charged mould and complementary controller.When solar-energy photo-voltaic cell electricity can not meet DC load needs, it is charge in batteries that complementary charge controller can control commercial power charged module, makes storage battery sustainably for DC load carries out low-voltage DC supply.Visible, home-use solar power plant system provided by the invention can walk abreast and use civil power and solar power generation complementally to charge for storage battery, effectively reduces the load short of electricity rate of whole system.Use compared with high-frequency ac powers with prior art illuminator, the low-pressure direct flow point that solar DC electricity power supply power station provided by the invention exports avoids lighting to produce stroboscopic, can effectively lower human eye risks of myopia, be applicable to the places such as school, family, institutional settings.Compared with the high frequency magnetic field produced with the single-phase alternating current of the civilian electricity of state specified standards that is 220 volts, 50 hertz, the magnetic field that the direct current that solar DC electricity power supply power station exports produces is very weak, less on the healthy impact of people, avoid the potential risk that high frequency magnetic field brings out human body various diseases.Especially be applicable to building in areas such as the rural area of utility grid instability, pastoral area, mountain areas, being embodied as user's illumination conveniently and independently and living provides the stable direct current continued.
accompanying drawing explanation
Fig. 1 is the structured flowchart of solar DC of the present invention electricity power supply power station embodiment;
Fig. 2 is the structured flowchart of commercial power charged control section in the embodiment of solar DC of the present invention electricity power supply power station.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, and below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
One of core idea of the embodiment of the present invention is, provide a kind of solar DC electricity power supply power station, the main power supply using solar power generation as electricity consumption is originated, and the direct current utilizing solar energy to export provides electric energy for DC load.Simultaneously, due to solar power system by season, round the clock, the impact of the weather factor such as rain or shine, when solar power generation can not meet the needs of domestic loads, adopt civil power to be that storage battery carries out boost charge, ensure that storage battery provides continual and steady DC power supply for domestic loads especially household illumination system.
With reference to Fig. 1, show the structured flowchart of solar DC of the present invention electricity power supply power station embodiment, comprising: solar-energy photo-voltaic cell 11, solar power generation controller 12, storage battery 13, complementary charge controller 14, commercial power charged module 15, battery discharging module 16, the DC load 17 of charging for storage battery 13.
Wherein, solar-energy photo-voltaic cell 11 is the cores in solar power system, is also most important part in solar power system.Its effect converts solar energy into electrical energy, or be sent in storage battery and store, or promote loaded work piece.
Solar power generation controller 12 carries out regulation and control for the electric energy changed solar-energy photo-voltaic cell 11, on the one hand the energy after adjustment is sent to DC load 17, on the other hand unnecessary energy is sent to storage battery 13 to store, when solar-energy photo-voltaic cell 11 electricity can not meet the needs of DC load 17, solar power generation controller 12 controls battery discharging module 16 and the electric energy that storage battery 13 stores is sent to DC load 17.
Complementary charge controller 14 is used for, when the electricity of storage battery 13 is not enough, controls commercial power charged module 15 and charging for storage battery 13, make storage battery 13 carry out direct current supply for DC load 17 sustainably as the core component of the embodiment of the present invention.
Commercial power charged module 15 is storage battery 13 store electrical energy for adopting civil power to be namely 220 volts or 380 volts of alternating currents in China.In the embodiment of the embodiment of the present invention, commercial power charged module 15 can be specially a direct-current switch power supply, its function is by ecosystem power supply (slightly electricity) poor for the quality of power supply, as mains supply or battery feed, convert the higher direct voltage of quality (essence electricity) meeting DC load and require to.
The structured flowchart of commercial power charged control section in the embodiment of the present invention as shown in Figure 2, in the embodiment of the present invention, the input of direct-current switch power supply 151 connects the output of mains-supplied circuit and complementary charge controller 14 respectively, and the output of direct-current switch power supply connects the charging end of storage battery 13.Complementary charge controller 14 specifically comprises: a relay 141, hysteresis comparator 142 and provide the linear voltage stabilization voltage source 143 of reference voltage stabilizing source for hysteresis comparator 142.Wherein, the input of hysteresis comparator 142 is connected with the both positive and negative polarity of storage battery 13, and the output of hysteresis comparator 142 is connected with the input of relay 141, and the output of relay 141 is connected with the input of direct-current switch power supply 151.
The course of work of commercial power charged control section shown in Fig. 2 is: the terminal voltage of hysteresis comparator 142 moment detection storage battery 13, when hysteresis comparator detects that the terminal voltage of storage battery 13 is less than the lower threshold of preset voltage, touch relay 141 to close, connect mains-supplied circuit, direct-current switch power supply 151 works, and is that storage battery 13 charges with constant current.Under commercial power charged pattern, when hysteresis comparator 142 detects the terminal voltage of storage battery 13 higher than preset voltage upper limit threshold, touch relay 141 to open, cut off the connection of direct-current switch power supply 151 and mains-supplied circuit, direct-current switch power supply 151 quits work.By the time, when hysteresis comparator 142 detects that the terminal voltage of storage battery 13 is less than the lower threshold of preset voltage again, again touch relay 141 and close, connect mains-supplied circuit, it is that storage battery 13 charges that direct-current switch power supply 151 works with constant current, so circulates.
Solar DC electricity power supply power station provided by the invention, when solar energy less powers such as continuous rainy weathers, civil power can be utilized to be storage battery boost charge as complementary power supply, thus the DC power supply making storage battery no matter all can provide stable for domestic loads especially lighting under what weather condition, continue, overcome in prior art solar powered by round the clock, shortcoming that weather, seasonal effect are larger.Because solar domestic power station is that illuminator carries out low-voltage DC supply, use compared with high-frequency ac powers with prior art illuminator, lighting can not produce stroboscopic, can effectively lower human eye risks of myopia, be applicable to the places such as school, family, institutional settings.On the other hand, compared with the high frequency magnetic field produced with the single-phase alternating current of the civilian electricity of state specified standards that is 220 volts, 50 hertz, the magnetic field that the direct current that solar DC electricity power supply power station exports produces is very weak, less on the healthy impact of people, avoid the potential risk that high frequency magnetic field brings out human body various diseases.Visible, solar DC electricity power supply power station provided by the invention is particularly suitable for the area such as rural area, pastoral area, mountain area being built in utility grid instability, and being embodied as user's illumination conveniently and independently and living provides the stable direct current continued.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.
Above to a kind of solar DC electricity power supply power station provided by the present invention, be described in detail, apply specific case herein to set forth principle of the present invention and execution mode, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.