CN102882280A - Capacitor hybrid energy storage based efficient wind-solar-utility power complementary power supply device - Google Patents
Capacitor hybrid energy storage based efficient wind-solar-utility power complementary power supply device Download PDFInfo
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- CN102882280A CN102882280A CN2011101946892A CN201110194689A CN102882280A CN 102882280 A CN102882280 A CN 102882280A CN 2011101946892 A CN2011101946892 A CN 2011101946892A CN 201110194689 A CN201110194689 A CN 201110194689A CN 102882280 A CN102882280 A CN 102882280A
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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
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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
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The invention provides a capacitor hybrid energy storage based efficient wind-solar-utility power complementary power supply system which consists of a wind driven generator 1, a solar battery 2, a utility power interface 3, an AC(alternating current) (DC) (direct current)/DC wind-solar controller 4, an AC /DC buck converter 5, a voltage hybrid capacitor set 6, a DC/AC inverter 7 and a load 8. Based on the principle that the power of the load is obtained by a power supply with higher voltage when two DC power supplies are connected in parallel for supplying power, wind and solar energy can be used to the great extent and utility power can be saved by improving the output voltage of the AC (DC)/DC wind-solar controller and reducing the output voltage of the utility power AC/DC inverter, entering into the capacitor set.
Description
Technical field
The present invention relates to the electric power system of a kind of wind power generation based on electric capacity mixing accumulation of energy, photovoltaic generation, mains hybrid, particularly preferentially efficiently utilize wind energy under super wide range wind speed and the illumination condition and the uninterrupted power supply device of luminous energy.
Background technology
Along with becoming increasingly conspicuous of energy crisis, the clean energy resource generation technologies such as wind power generation, photovoltaic generation are used more and more extensive, because the natural complementarity of honourable resource, wind power generation, photovoltaic generation complementation can provide more electric power resource.Scene, each generator unit of mains hybrid electric power system can independently be controlled also can co-ordination, and Supply Security and reliability ratio are higher, can provide uninterrupted electric power, conservation of power resource, environmental contamination reduction for communications facility and resident living.
It is that the electric power that solar energy or wind-driven generator send charges to storage battery or ultracapacitor by charge controller that current General System consists of, and the power supply of load is to be reverse into to exchange through inverter by the energy that storage battery or ultracapacitor store to supply with.Because it is uncertain that natural sunlight and wind speed change, so the output of the electric power of wind-light complementary system is unstable, just can not be to storage battery or ultracapacitor charging when the voltage that goes out when wind-light complementing power generation device is lower than the voltage of storage battery or ultracapacitor, the electric power utilance that this moment, wind-light complementing power generation device went out is very low, the energy practical efficiency of such wind and solar hybrid generating system is very low, and the energy storage device cost of storage battery or ultracapacitor is high, and volume is large.
Chinese patent CN2723723Y discloses a kind of wind-light complementary system, and this system adopts chargeable storage as energy storage device.The electric power that solar cell produces is by behind the maximal power tracing, charge a battery through the Battery charge controller loop, the electric power that wind-driven generator produces charges a battery through the Battery charge controller loop later on by rectification, and the cut-ff voltage of charging is constantly adjusted in the Battery charge controller loop according to default battery temperature.Storage battery is connected with dc bus, and storage battery provides alternating electromotive force by inverter to load.Chinese patent CN101286655A discloses a kind of wind power generation based on ultracapacitor energy storage, photovoltaic generation complementary power supply system, and this system adopts bank of super capacitors as energy storage device.The electric power that solar cell produces is by behind the maximal power tracing, charge to bank of super capacitors through bank of super capacitors charging control loop, the electric power that wind-driven generator or civil power produce charges to bank of super capacitors through bank of super capacitors charging control loop later on by rectification.Bank of super capacitors is connected with dc bus, and bank of super capacitors provides alternating electromotive force by inverter to load.
Above patent all adopts the energy-storage system powering load, if but wind speed when low the rotating speed of wind-driven generator very low, therefore the voltage that sends does not reach the voltage of storage battery or bank of super capacitors behind over commutation, can't accumulators or the bank of super capacitors charging, at this moment wind energy just can't be utilized.Equally, when illumination was low, the voltage that solar cell sends was also lower, at this moment also can't convert solar energy into electrical energy the charging of accumulators or bank of super capacitors.That is to say that the voltage that only has scene to send can utilize the energy of scene when being higher than the busbar voltage of storage battery or bank of super capacitors.When the voltage that sends when scene was lower than the busbar voltage of storage battery or bank of super capacitors, wind and solar hybrid generating system just can't continue the charging of accumulators or bank of super capacitors.Cause these energy to be wasted.
Chinese patent CN101540568A discloses a kind of high efficiency wind-light supplementary power generation control device, in this patent for the scope of the utilized wind speed that can enlarge wind-driven generator, and the utilized illumination range of expansion solar power generation, utilize two lifting/voltage reducing DC/DC converters of complemental power-generation to control by totally digitilized wind light mutual complementing power generation controller and realize crisscross parallel to charge in batteries, and power to the load.This patent is when light and wind-force is maximum in load, as run in the strong wind situations such as high wind, load can not be consumed timely, when wind-driven generator is in underloading or little year state, the voltage that sends can sharply raise, and is higher than rated voltage far away, causes the electric capacity 33 two ends interlock circuits in the buck DC/DC converter to be in very high voltage, to the corresponding increase of electronic devices and components requirement of withstand voltage of interlock circuit, the electronic devices and components cost is increased; Therefore and blade of wind-driven generator can be and High Rotation Speed makes the wearing and tearing aggravation of wind-driven generator, when serious even can produce the driving phenomenon, potential safety hazard occurs.
In sum, present wind-photovoltaic complementary power supply system all adopts the larger energy storage device of capacity, and cost is higher, and volume is large, safeguards inconvenience, adopts the device of batteries to store energy, and is seriously polluted, and useful life is short; Adopt the device of super capacitor energy-storage, its maintenance system and safeguards system are complicated, and cost is very large.
Summary of the invention
The present invention is directed to the existing subject matter of prior art, a kind of high efficiency wind-light based on electric capacity mixing accumulation of energy, mains hybrid electric supply installation are provided.Main purpose is exactly farthest to save civil power, and the energy that farthest utilizes scene to send is load supplying.The energy that the present invention can utilize gentle breeze and the low light level to send to greatest extent preferentially efficiently utilizes the wind light mutual complementing power supply, for load provides uninterrupted power supply.
The present invention is boosted to the low-voltage that wind-driven generator and solar energy send by AC (DC)/DC scene controller, the high voltage that wind-driven generator and solar energy are sent carries out (shunting) pressure limiting, obtains metastable direct voltage in the bus high-voltage capacitance at last and is used.
Civil power carries out the voltage stabilizing processing by the AC/DC buck converter to civil power in addition.The civil power that the voltage that wind and light send and the step-down of AC/DC buck converter are processed is incorporated on the high-voltage capacitance group bus and is mixed, and resupplies the DC/AC inverter, and being converted to AC power through the DC/AC inverter is load supplying.Utilize two-way DC parallel power supply, the principle that bearing power will be obtained by that high road power supply of voltage.Enter the civil power AC/DC buck converter output voltage of capacitance group by improving AC (DC)/DC scene controller output voltage and reducing, can farthest utilize view energy source and save civil power.
Realization of the present invention:
The present invention is comprised of wind-driven generator 1, solar cell 2, commercial power interface 3, AC (DC)/DC scene controller 4, AC/DC buck converter 5, voltage mixing capacitance group 6, DC/AC inverter 7, load 8.
The wind-driven generator power take-off is connected with the wind power generation interface of AC (DC)/DC scene controller, the solar cell output is connected with the photovoltaic generation interface of AC (DC)/DC scene controller, and commercial power interface is connected with AC/DC buck converter input interface.AC (the DC)/output of DC scene controller mixes the capacitance group dc bus with voltage and is connected in addition, AC/DC buck converter output mixes the capacitance group dc bus with voltage and is connected, the dc bus that voltage mixes capacitance group is connected with the input of DC/AC inverter, and load is directly connected to the output of DC/AC inverter.
AC (DC)/DC scene controller detects supervision by honourable voltage and the output voltage of controller after to rectification, the voltage signal of controller provides by input voltage sensor and output voltage sensor respectively, and by boost control circuit or unload and put control circuit and control output voltage, make output voltage reach a stationary value.Utilize control strategy in AC (the DC)/DC scene controller to finish the optimal control of wind-light-electricity electricity generation system.
Voltage mixes capacitance group and by diode and capacitance group input voltage is mixed and accumulation of energy, and directly is supplied to load after making electricity that the wind-light-electricity electricity generation system sends by the DC/AC inverter.Can save this energy storage device of storage battery or bank of super capacitors, save cost.
An effect of the present invention is, continual supply power supply can be provided, and be zero the change-over time that makes civil power, wind-light-electricity.And the transfer process of civil power, wind-light-electricity is simple, and reliability is high.
Another one effect of the present invention is, by a small amount of high-voltage electrolytic capacitor or super capacitor energy, saves huge storage battery or bank of super capacitors energy-storage system, and small product size is reduced, and circuit cost reduces.Adopt electrochemical capacitor or super capacitor energy, can give full play to electrochemical capacitor or super capacitor high power density, have extended cycle life, safeguard the advantages such as simple, pollution-free.
Another one effect of the present invention is, the wind-powered electricity generation of the unstable wide region of frequency is converted to direct voltage, and the peak value of direct voltage is limited by AC (DC)/DC scene controller.
Another one effect of the present invention is, by AC (DC)/DC scene controller the solar voltage that is lower than bus is carried out voltage lifting utilization high voltage is carried out peak-limitation.
Another one effect of the present invention is, limits by the output voltage of AC/DC buck converter to civil power, changes input ac voltage into output variable DC power supply.
Another one effect of the present invention is, can allocate the ratio of using wind-powered electricity generation, photoelectricity, civil power by AC (DC)/DC scene controller, can use to greatest extent wind energy or luminous energy, can catch more regenerative resource, saves civil power.
Another one effect of the present invention is, mixes capacitance group by voltage, wind-powered electricity generation, photoelectricity and mains supply is mixed, and give capacitance group, and the DC power supply on the capacitance group is converted to frequency and voltage-stabilized source output.
Description of drawings
Fig. 1 is operation principle block diagram of the present invention;
Fig. 2 is AC of the present invention (DC)/DC scene controller principle figure;
Fig. 3 is BOOST booster converter schematic diagram of the present invention;
Fig. 4 is AC/DC buck converter schematic diagram of the present invention;
Fig. 5 is that voltage of the present invention mixes the capacitance group schematic diagram;
Embodiment
Further specify the present invention below in conjunction with the drawings and specific embodiments.
Be illustrated in figure 1 as a kind of high efficiency wind-light based on capacitor mixing accumulation of energy of the present invention, mains hybrid electric supply installation, this enforcement comprises that wind-driven generator 1, solar cell 2, commercial power interface 3, AC (DC)/DC scene controller 4, AC/DC buck converter 5, voltage mix capacitance group 6, DC/AC inverter 7, load 8, dc bus 9.Wherein wind-driven generator 1 mixes capacitance group 6 with voltage and is connected by AC (DC)/DC scene controller 4, solar cell 2 mixes capacitance group 6 with voltage and is connected by AC (DC)/DC scene controller 4, commercial power interface 3 is mixed capacitance group 6 by AC/DC buck converter 5 and voltage and is connected, voltage mixes capacitance group 6 outputs and is connected with DC/AC inverter 7, and DC/AC inverter 7 outputs are connected with load 8.Capacitance group can adopt large electrochemical capacitor or super capacitor in the voltage mixing capacitance group 6.
Figure 2 shows that AC of the present invention (DC)/DC scene controller 4, it is comprised of wind-powered electricity generation rectifier 401, photorectifier 402, input filter inductance 403, input filter capacitor 404, input voltage sensor 405, drain charge load 406, controlled power switch 407, controller 408, BOOST booster converter 409, fly-wheel diode 410, output filter capacitor 411, output voltage sensor 412, output isolating diode 413.The voltage that wind-powered electricity generation rectifier 401 sends wind-driven generator is sent into input filter inductance 403 after turning direct voltage, the power supply of 402 pairs of solar energy of photorectifier carries out sending into input filter inductance 403 after the polarity identification, input filter capacitor 404 carries out filtering with wind-powered electricity generation voltage and the photoelectricity voltage of 403 pairs of inputs of input filter inductance, the input of input voltage sensor 405 is connected with the output of input filter inductance 403, the output of input voltage sensor 405 is connected with the negative terminal 9b of dc bus, input voltage is detected and sends into controller 408, when drain charge load 406 is higher than setting voltage for the voltage of ordering as K1, discharge unnecessary voltage, to keep the stable of K1 point voltage.The input of controlled power switch 407 is connected with drain charge load 406, and the output of controlled power switch 407 is connected with the negative terminal 9b of dc bus.BOOST booster converter 409 is used for when voltage that K1 order is lower than setting voltage, to the input voltage processing of boosting, with stablizing of maintenance K2 point voltage.When fly-wheel diode 410 is used for buck chopper to the afterflow of K2 point voltage.Output filter capacitor 411 is in the filtering to output voltage.412 pairs of output voltages of output voltage sensor detect and send into controller 408, and output isolating diode 413 prevents the electric current backflow of dc bus 9a end, affect the function of AC (DC)/DC scene controller 4.
Figure 3 shows that BOOST booster converter 409 of the present invention, it is by boost inductance 4091, and controlled power switch 4092, power rectification diode 4093 form.The input of boost inductance 4091 is connected with the output of input filter inductance 403, the input of controlled power switch 4092 is connected with the output of boost inductance 4091, the output of controlled power switch 4092 is connected with the negative terminal 9b of dc bus, power rectification diode 4093 inputs are connected with the output of input filter inductance 403, and power rectification diode 4093 outputs are connected with dc bus anode 9a.BOOST booster converter 409 is used for the voltage that is lower than dc bus 9 of gentle breeze or low light level generation is promoted utilization.
Figure 4 shows that AC/DC buck converter 5 of the present invention, it is comprised of interchange input rectifier 501, input filter inductance 502, input filter capacitor 503, controlled power switch 504, controller 505, power diode 506, output inductor rectifier 507, output filter capacitor 508, output voltage sensor 509, output isolating diode 510.Exchanging input rectifier 501 is used for electric main is carried out rectification, input filter inductance 502 and input filter capacitor 503 are used for sending into controlled power switch 504 after the input voltage filtering, 505 pairs of controlled power switches 504 of controller are adjusted, so that output voltage keeps stable.507 pairs of voltages of output inductor rectifier carry out the digitlization step-down to be processed, and power diode 506, output inductor rectifier 507 and output filter capacitor 508 form the BUCK reduction voltage circuit, the electric main of inputting is carried out step-down process.509 pairs of output voltages of output voltage sensor are taken a sample, and will export sampling voltage and send into controller 505.Output isolating diode 510 prevents the electric current backflow of dc bus 9a end, affects the function of AC/DC buck converter 5.In actual applications, the output voltage of AC/DC buck converter 5 requires to be lower than the voltage of AC (DC)/DC scene controller 4 outputs, but satisfy the minimum normal working voltage requirement of DC/AC inverter 7, preferentially used with the voltage that keeps AC (DC)/DC scene controller 4 outputs, to reduce the civil power utilization rate, save city's electric energy and utilize to greatest extent honourable resource.
Figure 5 shows that voltage of the present invention mixes capacitance group 6, it is comprised of jumbo high-voltage electrolytic capacitor 601.High-voltage electrolytic capacitor 601 also can be substituted by the super capacitor group.A plurality of high-voltage electrolytic capacitor 601 rear voltages that voltage and the AC/DC buck converter 5 of honourable controller 4 outputs of AC (DC)/DC are exported in parallel mix, and to the input voltage accumulation of energy, resupply DC/AC inverter 7.Mix capacitance group 6 capacity and decided by the required maximum instantaneous energy of the startup inductive load of DC/AC inverter 7, therefore mixing capacitance group 6 need not huge capacity, can greatly save cost.
Claims (5)
1. the high efficiency wind-light based on capacitor mixing accumulation of energy, mains hybrid electric supply installation is characterized in that: comprise that wind-driven generator 1, solar cell 2, commercial power interface 3, AC (DC)/DC scene controller 4, AC/DC buck converter 5, voltage mix capacitance group 6, DC/AC inverter 7, load 8, dc bus 9.Wherein wind-driven generator 1 mixes capacitance group 6 with voltage and is connected by AC (DC)/DC scene controller 4, solar cell 2 mixes capacitance group 6 with voltage and is connected by AC (DC)/DC scene controller 4, commercial power interface 3 is mixed capacitance group 6 by AC/DC buck converter 5 and voltage and is connected, voltage mixes capacitance group 6 outputs and is connected with DC/AC inverter 7, and DC/AC inverter 7 outputs are connected with load 8.Capacitance group can adopt large electrochemical capacitor or super capacitor in the voltage mixing capacitance group 6.
2. a kind of high efficiency wind-light based on capacitor mixing accumulation of energy as claimed in claim 1, the mains hybrid electric supply installation, it is characterized in that: the voltage that wind-powered electricity generation rectifier 401 sends wind-driven generator is sent into input filter inductance 403 after turning direct voltage, the power supply of 402 pairs of solar energy of photorectifier carries out sending into input filter inductance 403 after the polarity identification, input filter capacitor 404 carries out filtering with wind-powered electricity generation voltage and the photoelectricity voltage of 403 pairs of inputs of input filter inductance, the input of input voltage sensor 405 is connected with the output of input filter inductance 403, the output of input voltage sensor 405 is connected with the negative terminal 9b of dc bus, input voltage is detected and sends into controller 408, when drain charge load 406 is higher than setting voltage for the voltage of ordering as K1, discharge unnecessary voltage, to keep the stable of K1 point voltage.The input of controlled power switch 407 is connected with drain charge load 406, and the output of controlled power switch 407 is connected with the negative terminal 9b of dc bus.BOOST booster converter 409 is used for when voltage that K1 order is lower than setting voltage, to the input voltage processing of boosting, with stablizing of maintenance K2 point voltage.When fly-wheel diode 410 is used for buck chopper to the afterflow of K2 point voltage.Output filter capacitor 411 is in the filtering to output voltage.412 pairs of output voltages of output voltage sensor detect and send into controller 408, and output isolating diode 413 prevents the electric current backflow of dc bus 9a end, affect the function of AC (DC)/DC scene controller 4.
3. a kind of high efficiency wind-light based on capacitor mixing accumulation of energy as claimed in claim 1, mains hybrid electric supply installation, it is characterized in that: the input of boost inductance 4091 is connected with the output of input filter inductance 403, the input of controlled power switch 4092 is connected with the output of boost inductance 4091, the output of controlled power switch 4092 is connected with the negative terminal 9b of dc bus, power rectification diode 4093 inputs are connected with the output of input filter inductance 403, and power rectification diode 4093 outputs are connected with dc bus anode 9a.BOOST booster converter 409 is used for the voltage that is lower than dc bus 9 of gentle breeze or low light level generation is promoted utilization.
4. a kind of high efficiency wind-light based on capacitor mixing accumulation of energy as claimed in claim 1, mains hybrid electric supply installation, it is characterized in that: unsteady flow input rectifier 501 is used for electric main is carried out rectification, input filter inductance 502 and input filter capacitor 503 are used for sending into controlled power switch 504 after the input voltage filtering, 505 pairs of controlled power switches 504 of controller are adjusted, so that output voltage keeps stable.507 pairs of voltages of output inductor rectifier carry out the digitlization step-down to be processed, and power diode 506, output inductor rectifier 507 and output filter capacitor 508 form the BUCK reduction voltage circuit, the electric main of inputting is carried out step-down process.509 pairs of output voltages of output voltage sensor are taken a sample, and will export sampling voltage and send into controller 505.Output isolating diode 510 prevents the electric current backflow of dc bus 9a end, affects the function of AC/DC buck converter 5.In actual applications, the output voltage of AC/DC buck converter 5 requires to be lower than the voltage of AC (DC)/DC scene controller 4 outputs, but satisfy the minimum normal working voltage requirement of DC/AC inverter 7, preferentially used with the voltage that keeps AC (DC)/DC scene controller 4 outputs, to reduce the civil power utilization rate, save city's electric energy and utilize to greatest extent honourable resource.
5. a kind of high efficiency wind-light based on capacitor mixing accumulation of energy as claimed in claim 1, mains hybrid electric supply installation, it is characterized in that: a plurality of high-voltage electrolytic capacitor 601 rear voltages that voltage and the AC/DC buck converter 5 of honourable controller 4 outputs of AC (DC)/DC are exported in parallel mix, and to the input voltage accumulation of energy, resupply DC/AC inverter 7.Mix capacitance group 6 capacity and decided by the required maximum instantaneous energy of the startup inductive load of DC/AC inverter 7, therefore mixing capacitance group 6 need not huge capacity, can greatly save cost.
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| CN104319773A (en) * | 2014-11-25 | 2015-01-28 | 常熟市五爱电器设备有限公司 | Solar energy and electric supply flexible complementation power supply system |
| CN104470132A (en) * | 2014-12-05 | 2015-03-25 | 黎祥英 | Self-powered LED colorful-lamp control system |
| CN104868495A (en) * | 2015-05-12 | 2015-08-26 | 江苏固德威电源科技有限公司 | Input source intelligent identification method applied to new energy hybrid inverter |
| CN105048505A (en) * | 2015-08-24 | 2015-11-11 | 南通大学 | Wind-light complementary micro-grid system used for intelligent cell |
| CN105391112A (en) * | 2015-09-18 | 2016-03-09 | 东莞铭普光磁股份有限公司 | Mobile emergency power supply for communication and voltage self-adaptation method thereof |
| CN105652117A (en) * | 2015-12-29 | 2016-06-08 | 国网智能电网研究院 | DC power grid full-power circulating testing circuit based on DC/DC converter |
| CN105977957A (en) * | 2016-07-07 | 2016-09-28 | 三峡大学 | Household DC micro-power grid voltage stabilizing circuit and control method |
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| CN104470132A (en) * | 2014-12-05 | 2015-03-25 | 黎祥英 | Self-powered LED colorful-lamp control system |
| CN104868495A (en) * | 2015-05-12 | 2015-08-26 | 江苏固德威电源科技有限公司 | Input source intelligent identification method applied to new energy hybrid inverter |
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