CN112671014B - Flywheel energy storage variable speed power generation system - Google Patents
Flywheel energy storage variable speed power generation system Download PDFInfo
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- CN112671014B CN112671014B CN202110064162.1A CN202110064162A CN112671014B CN 112671014 B CN112671014 B CN 112671014B CN 202110064162 A CN202110064162 A CN 202110064162A CN 112671014 B CN112671014 B CN 112671014B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 57
- 238000010248 power generation Methods 0.000 title claims abstract description 49
- 230000006698 induction Effects 0.000 claims abstract description 62
- 238000004804 winding Methods 0.000 claims abstract description 51
- 230000001360 synchronised effect Effects 0.000 claims abstract description 36
- 239000003990 capacitor Substances 0.000 claims description 14
- 239000007787 solid Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000005284 excitation Effects 0.000 claims 2
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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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
Flywheel energy storage variable speed power generation system belongs to the motor field. The flywheel energy storage device solves the problems that an existing flywheel energy storage device is arranged on a direct current side, and the power generation system is complex in structure, low in efficiency and poor in reliability. When the multiphase permanent magnet synchronous wind driven generator is provided with 1 set of stator windings, the output end of the stator windings of the multiphase permanent magnet synchronous wind driven generator is simultaneously connected with the alternating current input end of the power converter and the head end of the power windings of the induction motor/generator, alternating current output by the alternating current output end of the power converter is connected to a power grid through a transformer, and the rotor of the induction motor/generator is coaxially connected with the inertia flywheel. The invention is mainly applied to wind power generation systems and small hydropower generation systems.
Description
Technical Field
The invention belongs to the field of motors, and particularly relates to a flywheel energy storage variable speed power generation system.
Background
Research on the utilization of renewable energy sources is paid attention to in various countries at present, and wind energy is rapidly developed due to the characteristics that the technology is relatively mature and can be utilized on a large scale. However, the randomness and intermittence of wind speed lead to a larger fluctuation of grid-connected power of the wind power plant. With the continuous expansion of wind power scale, the power fluctuation of the wind power has an increasing influence on the running stability and economy of the power grid, and even the safe running of the power grid is influenced. The energy storage device is introduced into the wind power generation system, so that the wind power fluctuation can be effectively restrained, the output voltage is smoothed, the electric energy quality is improved, and the wind power generation system is a key technology and a main stream mode for guaranteeing the grid-connected operation of wind power generation and promoting the utilization of wind energy.
The flywheel system has the advantages of high charging/discharging speed, high power density, long service life, small influence on environment, small occupied volume, low requirement on external geographic environment and the like. The application of flywheel system to wind power generation system for power storage has wide prospect.
When the flywheel energy storage system is applied to the wind power generation system which independently operates, active power can be quickly emitted or absorbed under the condition of wind fluctuation and load disturbance, balance of emitted power and consumed power of the wind power system is realized, and therefore, the utilization efficiency of wind energy and the power quality of power supply are improved.
The installation position of the flywheel energy storage device in the wind power generation system at present mainly comprises the following two modes that (1) the flywheel energy storage device is installed on a grid-connected side and (2) the flywheel energy storage device is installed on a direct current side. The structure diagram of the flywheel energy storage system applied to the grid-connected permanent magnet direct-drive wind power generation system is shown in fig. 1. The system comprises a direct-drive wind generating set, a flywheel energy storage system, a power converter, a load and the like, wherein the flywheel energy storage system is connected in parallel on a direct-current bus.
The over-high cost is a common problem of limiting the energy storage technology from being widely popularized and applied in wind power generation, and the improvement of the energy conversion efficiency and the reduction of the cost are important directions for the research of the energy storage technology in the future. In the wind power generation system shown in fig. 1, the energy storage motor needs to be connected in parallel to the DC bus through the AC-DC converter (i.e., the flywheel energy storage device is installed on the DC side), which results in high cost, low efficiency, poor reliability and complex control system structure of the power generation system.
Disclosure of Invention
The invention aims to solve the problems of complex structure, low efficiency and poor reliability of a power generation system caused by the fact that the existing flywheel energy storage device is arranged on a direct current side, and provides a flywheel energy storage variable speed power generation system, which has two structures, namely:
The first structure:
the flywheel energy storage variable speed power generation system comprises a multiphase permanent magnet synchronous wind power generator 1, a power converter 2, an induction motor/generator 3 and an inertial flywheel 4;
the multiphase permanent magnet synchronous wind driven generator 1 is provided with 1 set of stator windings, the output end of the stator windings of the multiphase permanent magnet synchronous wind driven generator 1 is simultaneously connected with the alternating current input end of the power converter 2 and the head end of the power winding of the induction motor/generator 3, the alternating current output by the alternating current output end of the power converter 2 is connected into a power grid through a transformer, and the rotor of the induction motor/generator 3 is coaxially connected with the inertia flywheel 4;
The power converter 2 is configured to convert the input ac power into dc power, and then convert the dc power into ac power for output.
The second structure:
the flywheel energy storage variable speed power generation system comprises a multiphase permanent magnet synchronous wind power generator 1, a power converter 2, an induction motor/generator 3 and an inertial flywheel 4;
The stator of the multiphase permanent magnet synchronous wind driven generator 1 is provided with two sets of stator windings, the output end of a first set of stator windings of the multiphase permanent magnet synchronous wind driven generator 1 is connected with the alternating current input end of the power converter 2, the output end of a second set of stator windings of the multiphase permanent magnet synchronous wind driven generator 1 is connected with the head end of a power winding of the induction motor/generator 3, the alternating current output end of the power converter 2 is connected into a power grid through a transformer, and the rotor of the induction motor/generator 3 is coaxially connected with the inertia flywheel 4;
The power converter 2 is configured to convert the input ac power into dc power, and then convert the dc power into ac power for output.
For the flywheel energy storage variable speed power generation system with the two structures, it is preferable that two sets of windings, namely a power winding and an exciting winding, are arranged on the stator of the induction motor/generator 3, and a multiphase capacitor bank is connected on the outgoing line of the exciting winding of the induction motor/generator 3 in parallel.
For the flywheel energy storage variable speed power generation system of the above two structures, it is preferable that the power winding head end of the induction motor/generator 3 is connected in parallel with a multiphase capacitor bank.
For the flywheel energy storage variable speed power generation system of the above two structures, it is preferable that the induction motor/generator 3 is a cage type rotor induction motor, a solid rotor induction motor, a wound rotor induction motor or a brushless doubly-fed induction motor.
For the flywheel energy storage variable speed power generation system with the two structures, three implementation modes of the power converter 2 are preferred:
The first type is that the power converter 2 is realized by an AC/DC converter 2-1, a capacitor and a DC/AC converter 2-2, wherein the capacitor is arranged between a direct current output end of the AC/DC converter 2-1 and a direct current input end of the DC/AC converter 2-2;
wherein the AC input end of the AC/DC converter 2-1 is used as the AC input end of the power converter 2, and the AC output end of the DC/AC converter 2-2 is used as the AC output end of the power converter 2;
The second type is that the power converter 2 is realized by an AC-AC converter;
third, the power converter 2 is implemented as an AC-DC-AC converter.
For the flywheel energy storage variable speed power generation system of the two structures, it is preferable that the power output end of the rotor of the induction motor/generator 3 is connected with a mechanical load or is connected with a wind turbine, a water turbine or other power machinery.
For the flywheel energy storage variable speed power generation system with the second structure, preferably, the two sets of stator winding phases on the stator of the multiphase permanent magnet synchronous wind driven generator 1 can be the same or different.
For the flywheel energy storage variable speed power generation system of the above two structures, it is preferable that the power generation system further includes an ac chopper connected to the tail end of the power winding of the induction motor/generator 3.
The beneficial effects brought by the invention are as follows:
The flywheel energy storage variable speed power generation system mainly comprises a multiphase permanent magnet synchronous wind power generator 1, a power converter and a stress motor/generator 3.
The invention directly connects the induction motor/generator 3 for energy storage to the output end of the stator winding of the multiphase permanent magnet synchronous wind driven generator 1, namely, the invention directly adds the induction motor/generator 3 for energy storage to the alternating current side of the multiphase permanent magnet synchronous wind driven generator 1, thereby omitting the AC-DC converter at the side of the energy storage motor in the prior art figure 1, reducing the capacity of the AC-DC power converter at the output side of the wind driven generator, reducing the system cost, improving the system efficiency, dynamic response and reliability and simplifying the control system.
The flywheel energy storage variable speed power generation system omits the conversion of an AC-DC converter at the side of the energy storage motor in the prior art figure 1, directly connects the energy storage motor to the AC side, reduces the primary power conversion, and has the characteristics of high energy conversion efficiency, low cost, long service life, high reliability, flexible arrangement, easy maintenance and the like. Has good application prospect in wind power generation systems and small hydroelectric power generation systems.
Drawings
FIG. 1 is a block diagram of a prior art permanent magnet direct drive wind power generation system with a flywheel energy storage device;
Fig. 2 is a schematic structural diagram of the flywheel energy-storage variable-speed power generation system according to the present invention when the multiphase permanent magnet synchronous wind power generator 1 is provided with 1 set of stator windings;
fig. 3 is a schematic structural diagram of the flywheel energy-storage variable-speed power generation system according to the present invention when the multiphase permanent magnet synchronous wind power generator 1 is provided with 2 sets of stator windings.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The first embodiment is described below with reference to fig. 2, and the flywheel energy storage variable speed power generation system of the present embodiment includes a multiphase permanent magnet synchronous wind generator 1, a power converter 2, an induction motor/generator 3, and an inertial flywheel 4;
the multiphase permanent magnet synchronous wind driven generator 1 is provided with 1 set of stator windings, the output end of the stator windings of the multiphase permanent magnet synchronous wind driven generator 1 is simultaneously connected with the alternating current input end of the power converter 2 and the head end of the power winding of the induction motor/generator 3, the alternating current output by the alternating current output end of the power converter 2 is connected into a power grid through a transformer, and the rotor of the induction motor/generator 3 is coaxially connected with the inertia flywheel 4;
The power converter 2 is configured to convert the input ac power into dc power, and then convert the dc power into ac power for output.
The invention directly connects the induction motor/generator 3 for energy storage to the output end of the stator winding of the multiphase permanent magnet synchronous wind driven generator 1, namely, the invention directly adds the induction motor/generator 3 for energy storage to the alternating current side of the multiphase permanent magnet synchronous wind driven generator 1, thereby omitting the AC-DC converter at the side of the energy storage motor in the prior art, reducing the capacity of the AC-DC power converter at the output side of the wind driven generator, reducing the system cost, improving the system efficiency, dynamic response and reliability and simplifying the control system.
In a specific application, the induction motor/generator 3 may not be connected to the flywheel 4 when the rotor inertia of the induction motor/generator 3 is sufficiently large.
The second embodiment is described below with reference to fig. 3, and the flywheel energy storage variable speed power generation system according to the present embodiment includes a multiphase permanent magnet synchronous wind generator 1, a power converter 2, an induction motor/generator 3, and an inertial flywheel 4;
The stator of the multiphase permanent magnet synchronous wind driven generator 1 is provided with two sets of stator windings, the output end of a first set of stator windings of the multiphase permanent magnet synchronous wind driven generator 1 is connected with the alternating current input end of the power converter 2, the output end of a second set of stator windings of the multiphase permanent magnet synchronous wind driven generator 1 is connected with the head end of a power winding of the induction motor/generator 3, the alternating current output end of the power converter 2 is connected into a power grid through a transformer, and the rotor of the induction motor/generator 3 is coaxially connected with the inertia flywheel 4;
The power converter 2 is configured to convert the input ac power into dc power, and then convert the dc power into ac power for output.
Referring to fig. 1 and 3, the present invention directly connects the induction motor/generator 3 for energy storage to the output end of the stator winding of the multiphase permanent magnet synchronous wind power generator 1, that is, the present invention directly adds the induction motor/generator 3 for energy storage to the AC side of the multiphase permanent magnet synchronous wind power generator 1, thereby omitting the AC-DC converter of the energy storage motor side in the prior art, reducing the capacity of the AC-DC power converter of the wind power generator output side, reducing the system cost, improving the system efficiency, dynamic response and reliability, and simplifying the control system.
The present embodiment allows for the specific connection of the flywheel energy storage variable speed power generation system components provided when the rotor inertia of the induction motor/generator 3 is sufficiently large that the induction motor/generator 3 may not be connected to the inertial flywheel 4, and further allows for two sets of stator windings on the stator of the multiphase permanent magnet synchronous wind power generator 1.
In a specific application, the induction motor/generator 3 may not be connected to the flywheel 4 when the rotor inertia of the induction motor/generator 3 is sufficiently large.
In the following, the first or second embodiment will be further described with reference to fig. 2 and 3, in which two sets of windings, respectively a power winding and an exciting winding, are provided on the stator of the induction motor/generator 3, and a multiphase capacitor bank is connected in parallel to the lead wire of the exciting winding of the induction motor/generator 3.
Description of the preferred embodimentthe present embodiment is described below with reference to fig. 2 and 3, in which one or both of the first and second embodiments are further described, and the power winding head end of the induction motor/generator 3 is connected in parallel with a polyphase capacitor bank.
In the fifth embodiment, the first or second embodiment will be further described with reference to fig. 2 and 3, and the induction motor/generator 3 is a cage-type rotor induction motor, a solid rotor induction motor, a wound rotor induction motor, or a brushless double-fed induction motor.
In the following, the present embodiment is described with reference to fig. 2 and 3, and the first or second embodiment is further described, and three implementations of the power converter 2 are described:
The first type is that the power converter 2 is realized by an AC/DC converter 2-1, a capacitor and a DC/AC converter 2-2, wherein the capacitor is arranged between a direct current output end of the AC/DC converter 2-1 and a direct current input end of the DC/AC converter 2-2;
wherein the AC input end of the AC/DC converter 2-1 is used as the AC input end of the power converter 2, and the AC output end of the DC/AC converter 2-2 is used as the AC output end of the power converter 2;
The second type is that the power converter 2 is realized by an AC-AC converter;
third, the power converter 2 is implemented as an AC-DC-AC converter.
In the preferred embodiment, when the power converter 2 is implemented using the AC/DC converter 2-1, a capacitor, and the DC/AC converter 2-2, the capacitor between the DC output of the AC/DC converter 2-1 and the DC input of the DC/AC converter 2-2 acts as a filter and smoothing.
In a seventh embodiment, the first or second embodiment will be further described with reference to fig. 2 and 3, in which the power output end of the rotor of the induction motor/generator 3 is connected to a mechanical load or to a wind turbine, a water turbine or other power machine.
In the following, the second embodiment is further described with reference to fig. 2 and 3, where the number of the two sets of stator windings on the stator of the multiphase permanent magnet synchronous wind generator 1 may be the same or different.
Detailed description of the inventionin the following description of the present embodiment with reference to fig. 2 and 3, the power generation system further includes an ac chopper connected to the tail end of the power winding of the induction motor/generator 3.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the different dependent claims and the features described herein may be combined in ways other than as described in the original claims. It is also to be understood that features described in connection with separate embodiments may be used in other described embodiments.
Claims (9)
1. The flywheel energy storage variable speed power generation system is characterized by comprising a multiphase permanent magnet synchronous wind power generator (1), a power converter (2), an induction motor/generator (3) and an inertia flywheel (4);
The multiphase permanent magnet synchronous wind driven generator (1) is provided with 1 set of stator windings, the output end of the stator windings of the multiphase permanent magnet synchronous wind driven generator (1) is simultaneously connected with the alternating current input end of the power converter (2) and the power winding head end of the induction motor/generator (3), alternating current output by the alternating current output end of the power converter (2) is connected to a power grid through a transformer, and the rotor of the induction motor/generator (3) is coaxially connected with the inertia flywheel (4);
And the power converter (2) is used for converting the input alternating current into direct current and then converting the direct current into alternating current for output.
2. The flywheel energy storage variable speed power generation system is characterized by comprising a multiphase permanent magnet synchronous wind power generator (1), a power converter (2), an induction motor/generator (3) and an inertia flywheel (4);
Two sets of stator windings are arranged on a stator of the multiphase permanent magnet synchronous wind driven generator (1), the output end of a first set of stator windings of the multiphase permanent magnet synchronous wind driven generator (1) is connected with the alternating current input end of the power converter (2), the output end of a second set of stator windings of the multiphase permanent magnet synchronous wind driven generator (1) is connected with the power winding head end of the induction motor/generator (3), alternating current output by the alternating current output end of the power converter (2) is connected into a power grid through a transformer, and a rotor of the induction motor/generator (3) is coaxially connected with the inertia flywheel (4);
And the power converter (2) is used for converting the input alternating current into direct current and then converting the direct current into alternating current for output.
3. Flywheel energy-storage variable-speed power generation system according to claim 1 or 2, characterized in that the stator of the induction motor/generator (3) is provided with two sets of windings, respectively a power winding and an excitation winding, and the outgoing lines of the excitation windings of the induction motor/generator (3) are connected in parallel with a multiphase capacitor bank.
4. Flywheel energy storage variable speed power generation system according to claim 1 or 2, characterized in that the power winding head end of the induction motor/generator (3) is connected in parallel with a multiphase capacitor bank.
5. Flywheel energy storage variable speed power generation system according to claim 1 or 2, characterized in that the induction motor/generator (3) is a cage rotor induction motor, a solid rotor induction motor, a wound rotor induction motor or a brushless doubly fed induction motor.
6. Flywheel energy storage variable speed power generation system according to claim 1 or 2, characterized in that the power converter (2) is implemented in three ways:
the first type is that the power converter (2) is realized by adopting an AC/DC converter (2-1), a capacitor and a DC/AC converter (2-2), wherein the capacitor is arranged between the direct current output end of the AC/DC converter (2-1) and the direct current input end of the DC/AC converter (2-2);
Wherein the alternating current input end of the AC/DC converter (2-1) is used as the alternating current input end of the power converter (2), and the alternating current output end of the DC/AC converter (2-2) is used as the alternating current output end of the power converter (2);
The second kind is that the power converter (2) is realized by an AC-AC converter;
and thirdly, the power converter (2) is realized by adopting an AC-DC-AC converter.
7. Flywheel energy storage variable speed power generation system according to claim 1 or 2, characterized in that the power output of the rotor of the induction motor/generator (3) is connected to a mechanical load or to a wind turbine, water turbine or other power machine.
8. Flywheel energy-storage variable speed power generation system according to claim 2, characterized in that the two sets of stator winding phases on the stator of the multiphase permanent magnet synchronous wind power generator (1) can be identical or different.
9. Flywheel energy storage variable speed power generation system according to claim 1 or 2, characterized in that the power generation system further comprises an ac chopper connected to the end of the power winding of the induction motor/generator (3).
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| CN202110064162.1A CN112671014B (en) | 2021-01-18 | 2021-01-18 | Flywheel energy storage variable speed power generation system |
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| CN202110064162.1A CN112671014B (en) | 2021-01-18 | 2021-01-18 | Flywheel energy storage variable speed power generation system |
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| CN115720025A (en) * | 2022-11-18 | 2023-02-28 | 青岛元动芯能源科技有限公司 | Nuclear power supply and power supply system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105874198A (en) * | 2013-11-05 | 2016-08-17 | 开放水知识产权有限公司 | Turbulence protection system and method for turbine generators |
| CN105978129A (en) * | 2016-06-27 | 2016-09-28 | 芜湖格利特新能源科技有限公司 | Distributed wind/photovoltaic power generation energy-storing and charging integrated charging method |
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| CN103280834B (en) * | 2013-05-13 | 2015-03-25 | 中国矿业大学 | Variable speed constant frequency and energy storage method and device for wind power generation |
| CN105140943B (en) * | 2014-06-09 | 2019-07-30 | 徐立民 | Wind generator system with flywheel and monopolar D. C electromagnetic driven machine |
| CN105545594B (en) * | 2016-01-25 | 2018-09-14 | 南通大学 | A kind of wind-driven generator energy recovery utilizing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105874198A (en) * | 2013-11-05 | 2016-08-17 | 开放水知识产权有限公司 | Turbulence protection system and method for turbine generators |
| CN105978129A (en) * | 2016-06-27 | 2016-09-28 | 芜湖格利特新能源科技有限公司 | Distributed wind/photovoltaic power generation energy-storing and charging integrated charging method |
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