CN201956895U - Device capable of carrying out filtration and harmonic suppression for wind power frequency converter - Google Patents
Device capable of carrying out filtration and harmonic suppression for wind power frequency converter Download PDFInfo
- Publication number
- CN201956895U CN201956895U CN2011200334288U CN201120033428U CN201956895U CN 201956895 U CN201956895 U CN 201956895U CN 2011200334288 U CN2011200334288 U CN 2011200334288U CN 201120033428 U CN201120033428 U CN 201120033428U CN 201956895 U CN201956895 U CN 201956895U
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- frequency converter
- wind
- wind power
- electricity generation
- powered electricity
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Abstract
The utility model provides a device capable of carrying out filtration and harmonic suppression for a wind power frequency converter, which comprises three harmonic suppression units, wherein the three harmonic suppression units comprise capacitors and resisters mutually connected in series and are angularly connected to a three-phase output end of the wind power frequency converter. The device also comprises three filtering inductors which are respectively connected with one single-phase output end of the three-phase output end of the wind power frequency converter. The device capable of carrying out filtration and harmonic suppression for the wind power frequency converter provided by the utility model adopts a special topological structure for hardware, and suppresses net-side harmonic with low cost, so that the pollution to a power grid is reduced, and the adaptability of the power grid is improved.
Description
Technical field
The utility model relates to a kind of device that carries out filtering and suppress harmonic wave, relates in particular to a kind of device that carries out filtering and inhibition harmonic wave that is used for the wind-powered electricity generation frequency converter.
Background technology
Wind generator system is extensive use, and along with the increase of wind-powered electricity generation ratio in electric power system, electrical network is had higher requirement to wind power system.
The quality of power supply of blower fan system is mainly by the decision of the performance of big-power transducer, and good frequency converter design not only can suppress harmonic wave, improves energy output, more can protect motor, prolongs unit useful life.
Usually, the rotor side of wind-powered electricity generation big-power transducer adopts the topological structure of resistance usually, reduces harmonic wave.But harmonic wave is still bigger, if control harmonic wave under lower cost, is the test to the wind-powered electricity generation big-power transducer.
Summary of the invention
Main purpose of the present utility model is to provide a kind of device that carries out filtering and inhibition harmonic wave that is used for the wind-powered electricity generation frequency converter, can control harmonic wave under lower cost and increase filter effect.
In order to achieve the above object, the utility model provides a kind of device that carries out filtering and inhibition harmonic wave that is used for the wind-powered electricity generation frequency converter, one comprises that three harmonic waves suppress the unit, this harmonic wave suppresses electric capacity and the resistance that the unit comprises mutual series connection, and these three harmonic waves suppress the three-phase output end that the unit dihedral is connected in the wind-powered electricity generation frequency converter.
During enforcement, described in the utility modelly be used for carrying out filtering and suppressing the device of harmonic wave of wind-powered electricity generation frequency converter, also comprise three filter inductances, this filter inductance is connected with a wherein phase output terminal in the three-phase output end of wind-powered electricity generation frequency converter respectively.
Compared with prior art, the device that carries out filtering and inhibition harmonic wave that is used for the wind-powered electricity generation frequency converter described in the utility model adopts special topological structure on hardware, suppress side harmonics under low cost, reduces the pollution to electrical network, improves grid adaptability,
Description of drawings
Fig. 1 is the circuit on side of overhead contact line topology schematic diagram that carries out a filtering and an embodiment of the device that suppresses harmonic wave that is used for the wind-powered electricity generation frequency converter described in the utility model;
Fig. 2 is the circuit on side of overhead contact line topology schematic diagram that carries out filtering and another embodiment of the device that suppresses harmonic wave that is used for the wind-powered electricity generation frequency converter described in the utility model.
Embodiment
Wind generator system generally adopts wind power generation frequency conversion device, and net side frequency converter links to each other with electrical network.In order to suppress side harmonics, reduce pollution to electrical network, improve grid adaptability, the utility model adopts special topological structure on hardware.
At the bigger phenomenon of wind-powered electricity generation big-power transducer harmonic wave, and electrical network requires more and more higher situation to the quality of power supply, the utility model has designed a kind of device that carries out filtering and inhibition harmonic wave that is used for the wind-powered electricity generation frequency converter, and adopt the electric topological structure of suitable frequency converter, under low cost, significantly reduce harmonic wave.
Frequency converter network lateral circuit topology is as depicted in figs. 1 and 2:
As shown in Figure 1, an embodiment who is used for the device that carries out filtering and inhibition harmonic wave of wind-powered electricity generation frequency converter described in the utility model comprises that three harmonic waves suppress unit, this harmonic wave suppresses electric capacity and the resistance that the unit comprises mutual series connection, and these three harmonic waves suppress the three-phase output end that the unit dihedral is connected in the wind-powered electricity generation frequency converter.
Fig. 1 circuit topology relative cost is lower, employing is carried out the electric capacity and the resistance of the mutual serial connection of particular design dihedral and is connected, and electric capacity that this is connected in series mutually and resistance need be selected high frequency attenuation output characteristic faster for use, after adopting this circuit, the high frequency attenuation behind the cut-off frequency equals 40DB.
As shown in Figure 2, another embodiment that carries out filtering and suppress the device of harmonic wave that is used for the wind-powered electricity generation frequency converter described in the utility model comprises three filter inductances, and this filter inductance is connected with a wherein phase output terminal in the three-phase output end of wind-powered electricity generation frequency converter respectively.
Fig. 2 circuit topology increases filter inductance on the basis of Fig. 1, filter effect is better.After adopting this circuit, the high frequency attenuation behind the cut-off frequency equals 60DB.
More than explanation is just illustrative for utility model; and nonrestrictive, those of ordinary skills understand, under the situation of the spirit and scope that do not break away from claims and limited; can make many modifications, variation or equivalence, but all will fall in the protection range of the present utility model.
Claims (2)
1. one kind is used for carrying out filtering and suppressing the device of harmonic wave of wind-powered electricity generation frequency converter, it is characterized in that, comprise that three harmonic waves suppress the unit, this harmonic wave suppresses electric capacity and the resistance that the unit comprises mutual series connection, and these three harmonic waves suppress the three-phase output end that the unit dihedral is connected in the wind-powered electricity generation frequency converter.
2. as claimed in claim 1ly be used for carrying out filtering and suppressing the device of harmonic wave of wind-powered electricity generation frequency converter, it is characterized in that, also comprise three filter inductances, this filter inductance is connected with a wherein phase output terminal in the three-phase output end of wind-powered electricity generation frequency converter respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200334288U CN201956895U (en) | 2011-01-30 | 2011-01-30 | Device capable of carrying out filtration and harmonic suppression for wind power frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200334288U CN201956895U (en) | 2011-01-30 | 2011-01-30 | Device capable of carrying out filtration and harmonic suppression for wind power frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201956895U true CN201956895U (en) | 2011-08-31 |
Family
ID=44500997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200334288U Expired - Lifetime CN201956895U (en) | 2011-01-30 | 2011-01-30 | Device capable of carrying out filtration and harmonic suppression for wind power frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201956895U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI464373B (en) * | 2012-10-19 | 2014-12-11 | Wistron Corp | Pull test apparatus |
-
2011
- 2011-01-30 CN CN2011200334288U patent/CN201956895U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI464373B (en) * | 2012-10-19 | 2014-12-11 | Wistron Corp | Pull test apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110831 |