CN212660004U - Backup emergency power supply of variable pitch system - Google Patents
Backup emergency power supply of variable pitch system Download PDFInfo
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- CN212660004U CN212660004U CN202021491020.0U CN202021491020U CN212660004U CN 212660004 U CN212660004 U CN 212660004U CN 202021491020 U CN202021491020 U CN 202021491020U CN 212660004 U CN212660004 U CN 212660004U
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- alternating current
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- driven generator
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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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
Abstract
The utility model discloses a become reserve emergency power supply of oar system aims at providing one kind and still can guarantee under the long-time outage's of electric wire netting that the battery capacity is in normal state's emergency power supply. The device comprises three groups of storage battery packs (5) which are respectively connected with a main system (3) through charge and discharge devices (6); the backup small wind driven generator (9) is connected with the main system (3) sequentially through the alternating current converter (8) and the alternating current dual-power switching device (2), the alternating current dual-power switching device (2) comprises a main control switch (2-1) and a charging switch (2-2), one end of the main control switch (2-1) is connected with a variable pitch system of the wind driven generator set (1), the other end of the main control switch is connected with the main system (3), one end of the charging switch (2-2) is connected with the output end of the alternating current converter (8), and the other end of the charging switch is connected with the main system (3). The utility model discloses can ensure that the system of becoming oar can normally work at any time, need not to wait for a long time that the battery charges.
Description
Technical Field
The utility model relates to a wind generating set reserve power especially relates to a wind generating set becomes oar and is reserve emergency power source.
Background
Wind generating sets generally utilize a pitch system to control the position and angle of blades relative to a rotating plane, and adjust the wind angle of the blades according to different wind speeds, so as to obtain maximum safe electric energy. In a conventional mode, a variable pitch system is powered by three-phase alternating current provided by a power grid; however, if the power grid suddenly fails or the voltage drops, the pitch control system cannot feather the blades to a safe state, and potential safety hazards exist. Therefore, a back-up power supply needs to be configured for the variable pitch system, and the safe operation of the wind driven generator is ensured. The storage battery has the advantages of high energy density, low cost, mature technology and the like, and the storage battery is mostly adopted as a backup power supply of the pitch system at present.
The variable pitch system mostly adopts an independent variable pitch technology, namely three blades correspond to three independent servo drivers, and each driver is independently provided with a standby power supply. Because the variable pitch of the wind generating set belongs to intermittent movement, the backup power supply is started only under the condition of grid voltage drop or grid power failure; therefore, the backup battery of the pitch system is in a 'standby' state most of the time, and is easy to break down. Especially, when the power grid is powered off for a long time and the wind generating set is in a stop state, three groups of storage battery packs of the variable pitch system cannot be charged, and the risk that the variable pitch operation cannot be carried out exists during starting.
Disclosure of Invention
The above-mentioned defect to prior art exists, the utility model aims at providing a become oar system reserve emergency power supply, it can guarantee under the long-time outage's of electric wire netting that the battery capacity is in normal condition.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the charging and discharging device comprises three groups of storage battery packs which are respectively connected with a main system through the charging and discharging devices; the backup small wind driven generator is connected with the main system sequentially through the alternating current converter and the alternating current double-power-source switching device, the alternating current double-power-source switching device comprises a main control switch and a charging switch, one end of the main control switch is connected with a variable pitch system of the wind driven generator set, the other end of the main control switch is connected with the main system, one end of the charging switch is connected with the output end of the alternating current converter, and the other end of.
A controller is connected between the output end of the alternating current converter and the main system, and the controller is respectively in communication connection with the alternating current double-power switching device and the main system; a battery switch is connected between each storage battery pack and the corresponding charging and discharging device; the backup small-sized wind driven generator is fixed at the top outside the cabin of the wind driven generator set.
Compared with the prior art, the utility model discloses owing to adopted above-mentioned technical scheme, consequently have following advantage:
1) due to the fact that the backup small wind driven generator is added, the floating charging state of the three groups of storage battery packs can be kept under the condition that a power grid is powered off, the electric quantity of the storage battery packs can be kept normal, the pitch control system can work normally at any time, and the storage battery charging does not need to wait for a long time.
2) The alternating-current double-power-supply switching device can ensure that the backup small wind driven generator and the wind driven generator set are mutually interlocked and isolated, and the mutual safe operation of the backup small wind driven generator, the backup small wind driven generator and the wind driven generator set is ensured.
3) The controller is adopted to monitor the voltage of the main system, so that the backup small wind driven generator can be isolated from the main system, and the operation safety of the backup small wind driven generator, the charging and discharging device and the storage battery can be ensured.
Drawings
Fig. 1 is a schematic diagram of the present invention.
In the figure: the system comprises a wind generating set 1, an alternating current double-power-supply switching device 2, a main control switch 2-1, a charging switch 2-2, a main system 3, a battery switch 4, a storage battery pack 5, a charging and discharging device 6, a controller 7, an alternating current converter 8 and a backup small wind driven generator 9.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1: the three groups of storage battery packs 5 are respectively connected with the main system 3 through charge and discharge devices 6, and the charge and discharge devices 6 comprise an inverter circuit, a rectifying circuit and a detection circuit. The backup small-sized wind driven generator 9 is connected with the main system 3 through the alternating current converter 8 and the alternating current dual-power switching device 2 in sequence. The alternating current dual power supply switching device 2 comprises a main control switch 2-1 and a charging switch 2-2, one end of the main control switch 2-1 is connected with a variable pitch system (not shown in the figure) of the wind generating set 1, the other end of the main control switch is connected with the main system 3, one end of the charging switch 2-2 is connected with the output end of the alternating current converter 8, and the other end of the charging switch is connected with the main system 3.
In order to avoid the conflict between the voltage of the backup small-sized wind driven generator 9 and the voltage of the main system 3, a controller 7 is connected between the output end of the alternating current converter 8 and the main system 3, and the controller is respectively connected with the alternating current double power supply switching device 2 and the main system 3 in a communication mode.
For the convenience of operations such as maintenance, a battery switch 4 is connected between each battery pack 5 and the corresponding charging/discharging device 6.
In order to ensure a compact structure, the backup small-sized wind driven generator 9 is fixed on the top (not shown in the figure) outside the nacelle of the wind generating set 1.
In the above embodiments, the inverter circuit, the rectifier circuit and the detection circuit are all mature technologies, and are not described herein.
The working principle is as follows:
in a normal state, the power grid supplies power to a variable pitch system (not shown in the figure) of the wind generating set 1 through the alternating current dual power supply switching device 2 (the main control switch 2-1 is closed and the charging switch 2-2 is opened) through the main system 3 on one hand, so that variable pitch operation is realized; on the other hand, the main system 3 charges the corresponding battery pack 5 through the rectifier circuit in each charging and discharging device 6, and each battery pack 5 is in an energy storage state.
When the power grid supplies power, but the wind generating set 1 is in a stop state, because the detection circuit in each charging and discharging device 6 does not detect the voltage abnormality of the main system 3, the power grid alternating current still charges the corresponding storage battery pack 5 through the rectification circuit in each charging and discharging device 6 so as to keep normal electric quantity; each battery pack 5 is in an energy storage state.
If the power grid is powered off for a short time, but the wind generating set 1 is still in a running state, the detection circuit in each charging and discharging device 6 can detect that the voltage of the main system 3 is abnormal, so that each storage battery pack 5 supplies power to the variable pitch system through the main system 3 and the alternating current dual power supply switching device 2 (the main control switch 2-1 is closed, and the charging switch 2-2 is opened) in sequence through the inverter circuit in the corresponding charging and discharging device 6, and the variable pitch operation is realized.
If the power grid is powered off for a long time and the wind generating set 1 is in a shutdown state, the controller 7 detects that the main control switch 2-1 is disconnected and the voltage of the main system 3 is abnormal, and the controller 7 immediately instructs the charging switch 2-2 to be closed; alternating current generated by the backup small-sized wind driven generator 9 is subjected to voltage transformation and frequency conversion through the alternating current converter 8, and then sequentially passes through the charging switches 2-2 and the main system 3 to respectively keep a floating charging state for each storage battery pack 5, so that each storage battery pack 5 maintains normal electric quantity. Therefore, when the variable pitch system needs to be started, the variable pitch system can work normally without waiting for the charging of the storage battery pack for a long time. When the machine is started, the charging switch 2-2 is immediately switched off while the main control switch 2-1 is controlled to be switched on; the pitch system is powered by each battery pack 5.
When the controller 7 detects that the voltage of the main system 3 is normal (the power supply of the power grid is restored), the controller 7 immediately turns off the charging switch 2-2, and the storage battery pack 5 is continuously charged by the power grid.
Claims (4)
1. A backup emergency power supply of a variable pitch system comprises three groups of storage battery packs (5) which are respectively connected with a main system (3) through charge and discharge devices (6); the method is characterized in that: the backup small wind driven generator (9) is connected with the main system (3) sequentially through the alternating current converter (8) and the alternating current dual-power switching device (2), the alternating current dual-power switching device (2) comprises a main control switch (2-1) and a charging switch (2-2), one end of the main control switch (2-1) is connected with a variable pitch system of the wind driven generator set (1), the other end of the main control switch is connected with the main system (3), one end of the charging switch (2-2) is connected with the output end of the alternating current converter (8), and the other end of the charging switch is connected with the main system (3).
2. The pitch system backup emergency power supply of claim 1, wherein: and a controller (7) is connected between the output end of the alternating current converter (8) and the main system (3), and the controller is respectively in communication connection with the alternating current double-power-supply switching device (2) and the main system (3).
3. The pitch system backup emergency power supply of claim 1, wherein: a battery switch (4) is connected between each battery pack (5) and the corresponding charge/discharge device (6).
4. The pitch system backup emergency power supply of claim 1, wherein: the backup small-sized wind driven generator (9) is fixed at the top outside the engine room of the wind driven generator set (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021491020.0U CN212660004U (en) | 2020-07-26 | 2020-07-26 | Backup emergency power supply of variable pitch system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021491020.0U CN212660004U (en) | 2020-07-26 | 2020-07-26 | Backup emergency power supply of variable pitch system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212660004U true CN212660004U (en) | 2021-03-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021491020.0U Active CN212660004U (en) | 2020-07-26 | 2020-07-26 | Backup emergency power supply of variable pitch system |
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| Country | Link |
|---|---|
| CN (1) | CN212660004U (en) |
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2020
- 2020-07-26 CN CN202021491020.0U patent/CN212660004U/en active Active
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