CN218678459U - Energy storage control system for improving wind power generation efficiency - Google Patents
Energy storage control system for improving wind power generation efficiency Download PDFInfo
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- CN218678459U CN218678459U CN202221132528.0U CN202221132528U CN218678459U CN 218678459 U CN218678459 U CN 218678459U CN 202221132528 U CN202221132528 U CN 202221132528U CN 218678459 U CN218678459 U CN 218678459U
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Abstract
The utility model discloses an energy storage control system for improving the energy efficiency of wind power generation, wherein a wind power generator is connected with a rectifier; the rectifier is connected with the change-over switch; two ends of the change-over switch are respectively connected with the inverter and the direct current controller; the inverter is simultaneously connected with an alternating current power grid, the bidirectional energy storage converter and an alternating current load; the direct current controller is connected with the bidirectional energy storage converter and the energy storage equipment. The utility model introduces a change-over switch, the current generated by the wind driven generator is transmitted to the rectifier and the change-over switch, and the change-over switch is connected with the energy storage equipment through the direct current controller when the wind driven generator is off the grid and has no alternating current load; when energy storage equipment charges when accomplishing, wind energy connects alternating current network and alternating current load through rectifier and change over switch to dc-to-ac converter, all need not through two-way energy storage converter, the utility model provides high wind power generation's efficiency.
Description
Technical Field
The utility model relates to an improve energy storage control system of wind power generation efficiency belongs to wind power generation technical field.
Background
With the development of national economy, the domestic power consumption demand is increasing day by day, the power supply is tense day by day, and the power supply stability is challenged. Wind power generation has received a great deal of attention as a form of renewable energy power generation. The principle is a power generation mode for converting wind energy into electric energy by using a wind generating set.
The current wind power generation energy storage control system comprises a wind power generator, a rectifier, an inverter, a direct current controller, a bidirectional energy storage converter, an alternating current load, an alternating current grid and energy storage equipment. The current wind power generation energy storage control system has the following two working modes, which are shown in fig. 1:
mode 1: the wind power generation current is rectified by the rectifier, is merged into a power grid after being output with qualified alternating current by the inverter, and can also flow into the bidirectional energy storage converter after being inverted by the inverter to be converted into proper charging current to charge the energy storage equipment;
mode 2: after being rectified by the rectifier, the wind power generation current flows through the direct current controller and is converted into charging current which can directly supply power to the energy storage equipment, and the charging current supplies power to the energy storage equipment; the energy storage device can also be used for flowing into a power grid or directly supplying power to an alternating current load.
The problems with both modes of operation are analyzed as follows:
when the system is in an off-grid working condition and no alternating current load needs to be supplied with power, the mode 1 can only output direct current through the bidirectional energy storage converter to store wind energy into the energy storage equipment, and compared with the mode 2, the conversion of the bidirectional energy storage converter is increased, so that the wind power generation efficiency is reduced;
after the energy storage equipment is charged, the mode 2 can only be converted by the bidirectional energy storage converter, the output alternating current is merged into a power grid to supply power to an alternating current load, the circulation of a conversion circuit of the bidirectional energy storage converter is increased compared with the mode 1, and the energy efficiency of wind power generation is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome prior art's defect, provide an energy storage control system who improves wind power generation efficiency.
In order to achieve the above object, the utility model provides an improve energy storage control system of wind power generation efficiency, including aerogenerator, rectifier, change over switch and dc-to-ac converter, aerogenerator and rectifier are connected, and rectifier and change over switch are connected, and change over switch is one of following two kinds of working methods:
one end of the lower transfer switch in the working mode 1 is connected with the inverter;
the other end of the down-conversion switch in the working mode 2 is connected with the direct current controller.
Preferably, the system comprises an ac grid, and the inverter is connected to the ac grid and is configured to supply power to the ac grid after the transfer switch is turned on.
Preferably, the energy storage system comprises a bidirectional energy storage converter, and the inverter and the direct current controller are both connected with the bidirectional energy storage converter and used for supplying power to the bidirectional energy storage converter after the change-over switch is connected with the inverter or the direct current controller.
Preferably, the energy storage device is included, and the direct current controller is connected with the energy storage device and used for supplying power to the energy storage device after the change-over switch is connected with the direct current controller.
Preferably, the inverter is connected with the alternating-current load and used for supplying power to the alternating-current load after the conversion switch is switched on.
Preferably, the transfer switch is a bidirectional transfer switch.
Preferably, the energy storage device can be switched to the working mode 1 through the change-over switch after the charging reaches the set electric quantity.
Preferably, the operating mode 2 can only be switched by the changeover switch when the grid is off and there is no ac load.
The utility model discloses the beneficial effect who reaches:
the utility model discloses introduced change over switch, wind driven generator electricity generation back electric current is through two-way change over switch after the rectification period, selects working method 1 or working method 2 according to operating condition. When the grid is disconnected and the alternating current load does not exist, the change-over switch is switched to be directly connected with the direct current controller, and when the grid is disconnected and the alternating current load does not exist, the change-over switch is switched to a working mode 2, so that wind energy is stored in the energy storage equipment without flowing through the bidirectional energy storage converter; when the energy storage equipment is fully charged, the position of the change-over switch is directly connected with the inverter, the change-over switch is switched to a working mode 1 after the energy storage equipment is charged to reach the set electric quantity, and the energy storage equipment is directly connected into a power grid through the inverter or directly participates in power supply for an alternating current load without passing through a bidirectional energy storage converter; therefore, the utility model discloses effectively improved wind power generation's efficiency.
Drawings
FIG. 1 is a topological diagram of the working mode of a conventional wind power generation energy storage system;
fig. 2 is a topological diagram of the working mode of the present invention.
Detailed Description
The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
It should be noted that, if there is a directional indication (such as up, down, left, right, front, and back) in the embodiment of the present invention, it is only used to explain the relative position relationship between the components, the motion situation, etc. in a certain specific posture, and if the specific posture is changed, the directional indication is changed accordingly.
An energy storage control system for improving wind power generation energy efficiency comprises a wind power generator, a rectifier, a change-over switch, an inverter, a direct current controller, an alternating current grid, a bidirectional energy storage converter and energy storage equipment;
the wind driven generator is connected with a rectifier, the rectifier is connected with a change-over switch, the change-over switch is respectively connected with an inverter and a direct current controller, the inverter is respectively connected with an alternating current power grid, a bidirectional energy storage converter and an alternating current load, and the direct current controller is respectively connected with the bidirectional energy storage converter and the energy storage equipment;
the working mode of the utility model is as shown in fig. 2, the power generated by the wind driven generator flows through the rectifier and then flows through the change-over switch, and the change-over switch determines to adopt the working mode 1 or the working mode 2 according to the actual working condition;
when the off-grid working condition is adopted and no alternating current load needing power supply exists, the working mode 2 is adopted, the change-over switch is directly connected with the direct current controller, wind energy is directly stored in the energy storage equipment after being subjected to direct current conversion through the rectifier and the direct current controller, and the wind energy does not need to flow through the bidirectional energy storage converter;
when the electric energy of the energy storage device is completed, a working mode 1 is adopted, the change-over switch is switched to the inverter, and at the moment, wind energy is directly merged into an alternating current power grid and can supply power to an alternating current load without flowing through a bidirectional energy storage converter; so the utility model provides high wind power generation's efficiency.
The wind driven generator, the rectifier, the change-over switch, the inverter, the dc controller, the ac power grid, the bidirectional energy storage converter and the energy storage device may be of various types in the prior art, and those skilled in the art may select a suitable type according to actual requirements, and the embodiments are not illustrated.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (8)
1. The energy storage control system for improving the energy efficiency of wind power generation is characterized by comprising a wind power generator, a rectifier, a change-over switch, an inverter and a direct current controller, wherein the wind power generator is connected with the rectifier, the rectifier is connected with the change-over switch, and the change-over switch is in one of the following two working modes:
one end of the down conversion switch in the working mode 1 is connected with the inverter;
the other end of the down-conversion switch in the working mode 2 is connected with the direct current controller.
2. The energy storage control system for improving the energy efficiency of wind power generation according to claim 1,
the inverter is connected with the alternating current power grid and used for supplying power to the alternating current power grid after the conversion switch is connected with the inverter.
3. The energy storage control system for improving the energy efficiency of wind power generation according to claim 1,
the bidirectional energy storage converter is used for supplying power to the bidirectional energy storage converter after a change-over switch is connected with the inverter or the direct current controller.
4. The energy storage control system for improving the energy efficiency of wind power generation according to claim 1,
the direct current controller is connected with the energy storage device and used for supplying power to the energy storage device after the change-over switch is connected with the direct current controller.
5. The energy storage control system for improving the energy efficiency of wind power generation according to claim 1,
the inverter is connected with the alternating current load and used for supplying power to the alternating current load after the change-over switch is connected with the inverter.
6. The energy storage control system for improving the energy efficiency of wind power generation according to claim 1,
the change-over switch is a bidirectional change-over switch.
7. The energy storage control system for improving the energy efficiency of wind power generation according to claim 4,
after the energy storage device is charged to reach the set electric quantity, the working mode 1 can be switched to through the change-over switch.
8. The energy storage control system for improving the energy efficiency of wind power generation according to claim 1,
when the system is off-grid and has no alternating current load, the working mode 2 can be switched by the change-over switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221132528.0U CN218678459U (en) | 2022-05-12 | 2022-05-12 | Energy storage control system for improving wind power generation efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221132528.0U CN218678459U (en) | 2022-05-12 | 2022-05-12 | Energy storage control system for improving wind power generation efficiency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218678459U true CN218678459U (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221132528.0U Active CN218678459U (en) | 2022-05-12 | 2022-05-12 | Energy storage control system for improving wind power generation efficiency |
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| Country | Link |
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| CN (1) | CN218678459U (en) |
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2022
- 2022-05-12 CN CN202221132528.0U patent/CN218678459U/en active Active
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