CN203434628U - Filtering device of draught fan frequency converter in wind power plant - Google Patents
Filtering device of draught fan frequency converter in wind power plant Download PDFInfo
- Publication number
- CN203434628U CN203434628U CN201320507064.1U CN201320507064U CN203434628U CN 203434628 U CN203434628 U CN 203434628U CN 201320507064 U CN201320507064 U CN 201320507064U CN 203434628 U CN203434628 U CN 203434628U
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- fuse
- cabinet
- frequency converter
- filter
- filter cabinet
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- 238000001914 filtration Methods 0.000 title abstract 3
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 230000005684 electric field Effects 0.000 claims description 9
- 238000002788 crimping Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000630 rising 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model discloses a filtering device of a draught fan frequency converter in a wind power plant. The device comprises a filter cabinet. Fuse bases, fuses, capacitors are disposed in the filter cabinet. A ground wire binding post is disposed on the bottom of the filter cabinet. The number of the fuse bases and the number of the fuses are three. Each fuse base is provided with one fuse. The capacitors are connected by star connection. Connection points of the capacitors are correspondingly connected with output ends of the three fuse bases. Input ends of the fuse bases are connected with 400V voltage side through cables. The ground wire binding post is connected with ground through a grounding cable. After the filtering device is used, higher harmonic obviously reduces, machine sets do not have yaw faults and shutdown phenomenon, and temperature of each device is normal and stable, and operation status is good.
Description
Technical field
The utility model relates to a kind of filter, relates in particular to a kind of wind electric field blower frequency converter filter.
Background technology
Frequently there is the fault of going off course in the existing wind-powered electricity generation unit that configures Hitachi's frequency converter, the immediate cause that the fault that causes going off course occurs is that 400V voltage side exists high order harmonic component to cause that driftage soft initiator is abnormal, unit compares compared with normal at the not load-carrying waveform of 400V, be with load wave distortion afterwards, from the waveform of 1000kW and 1450kW load, load influencing factor is little, but follow current transformer whether operation is related, after current transformer operation, because resonance has amplified harmonic wave.In the voltage of 400V side 2.90kHz, there is peak value.Blower fan side apparatus (driftage control etc.) has resonance point at 2.90kHz.Because the operating frequency (3kHz) of the resonance point of Fan Equipment (2.90kHz) and current transformer approaches, voltage high order harmonic component (the being mainly 3000Hz) content of wind-powered electricity generation unit 400V accessory power supply surpasses 10%, and the voltage harmonic content of the primary side 690V of auxiliary supply transformer end is when the highest only 2%, that is to say, after transformer, high order harmonic component has been exaggerated more than 5 times.The basic reason that 400V voltage side produces high order harmonic component is that engine room inside device and dry-type transformer produce and when resonance causes higher harmonic content to increase the frequency converter operation of ，Bing Hitachi, amplify high order harmonic component.
Owing to frequently breaking down, cause unit frequent shutdown, have a strong impact on equipment operation, and the high order harmonic component being exaggerated has been brought equipment intensification, the series of problems such as reduction device lifetime, necessary solution.
Utility model content
In order to solve the problems of the prior art, the purpose of this utility model is to provide a kind of wind electric field blower frequency converter filter.
For achieving the above object, the technological means that the utility model adopts is: a kind of wind electric field blower frequency converter filter, comprise filter cabinet, be arranged on fuse base, fuse, capacitor in filter cabinet, be arranged on the earth terminal of filter cabinet bottom; Described fuse base and fuse all arrange three, and each fuse base is installed a fuse; Described capacitor adopts Y-connection, the corresponding output that connects three fusing point device seats of its tie point; The input of described fuse base connects 400V voltage side by cable; Described earth terminal is by ground cable ground connection.
Further, described cable adopts 4mm
2/ 1500V wire; Described ground cable adopts 2.5mm
2/ 1500V wire.
Further, described fuse specification is 400V/32A, and described capacitor specification is 400V/14kVA.
Further, described filter cabinet comprises cabinet and cabinet door, and cabinet and cabinet door are bolted.
The beneficial effects of the utility model are: high order harmonic component obviously reduces, and unit is without driftage disorderly closedown phenomenon, and each device temperature is normally stable, and operation conditions is good.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the technical solution of the utility model is described.
Fig. 1 is appliance wiring figure of the present utility model;
Fig. 2 is single-phase isopleth map of the present utility model.
Embodiment
A kind of wind electric field blower frequency converter filter as shown in Figure 1, comprises filter cabinet, is arranged on fuse base, fuse, capacitor in filter cabinet, is arranged on the earth terminal of filter cabinet bottom; Described fuse base and fuse all arrange three, and each fuse base is installed a fuse; Described capacitor adopts Y-connection, the corresponding output that connects three fusing point device seats of its tie point; The input of described fuse base connects 400V voltage side by cable; Described earth terminal is by ground cable ground connection.
Further, described cable adopts 4mm
2/ 1500V wire; Described ground cable adopts 2.5mm
2/ 1500V wire.
Further, described fuse specification is 400V/32A, and described capacitor specification is 400V/14kVA.
Further, described filter cabinet comprises cabinet and cabinet door, and cabinet and cabinet door are bolted.
Principle explanation: as shown in Figure 2, at 400V, hold and connect a larger capacity capacitor, the one, resonance point is departed from, the 2nd, for high order harmonic component provides bypass, be equivalent to a high pass trap.In order to facilitate type selecting, and to connect a rated voltage be 450V, capacity is the three phase parallel capacitor Xc of 12kVAr, at this moment, the impedance of X0 and Xc branch road is j10.7-j0.28=j10.42, on 400V bus the attenuation rate of 3000Hz component be 10.42/0.28=37 doubly, after the component of former 3000Hz voltage higher harmonic content 2% access capacitor by less than 0.1%.The power current that flows through Xc is 12/0.45 * 0.4=10.6A; 3000Hz harmonic current 400 * 0.02/3.32=0.8A; Resultant current (10.62+0.82)=10.6A, is no more than capacitor rated current 15.4A.Certainly, more jumbo capacitor can be obtained better filter effect, but should consider the ability to bear of its power current and the rising of power-frequency voltage when unloaded, simultaneously natural resonance point should avoid harmonic component larger o'clock as 5,7,11 times.
1, the wiring of filter cabinet and dry-type transformer outlet 400V distribution:
From fuse upper end, draw three 10 meters of long power cables, specifications and models are 4mm
2/ 1500V; Use circular hole cylindricality cable end (EN4-9), after crimping, insert fuse base installing hole, tighten; From base of capacitor, draw 1.5 meters of green earth connections, specifications and models are 2.5mm
2/ 1500V; Use 4-5mm
2after terminal compression joint, be installed on floor installation pin, tighten.The opposite side of three power cables and green earth connection passes from filter cabinet wire hole, and 4 terminals of crimping: specifications and models are 6-12mm
2, after in filter cabinet, distribution completes, please filter cabinet door is installed.
2, the installation of filter cabinet
In tower cylinder, there is the bottom of platform at the bottom of tower of dry-type transformer to select to install near the region of dry-type transformer, please installing at the column near zone near tower base cabinet without dry-type transformer in tower cylinder, notice that installation site should be convenient to filter cabinet door and open, be conducive to so later maintenance, and below tower cylinder bottom platform, go under not impact personnel.
3, with the wiring of 400V side
A scheme: with the wiring of dry-type transformer 400V side
When fan parking, disconnect the circuit breaker of dry-type transformer 690V side, with universal instrument, measure after dry-type transformer 400V side no-voltage, carry out following wiring work, through cable aperture, be connected with three-phase 400V with the PE of dry-type transformer 400V side; Dry-type transformer side terminal should fully contact, and checks that whether distribution is wrong, confirms crimp type terminal non-loosening, the fastening regulation position that is arranged on, and after above wiring is errorless on inspection, circuit breaker that can closed dry-type transformer 690V side.
B scheme: with the wiring of tower base cabinet 400V side
When fan parking, disconnection is positioned at the circuit breaker of the dry-type transformer in case change, while there is no electricity on measuring X0/400 binding post, carry out following wiring work, earth connection joins through the earth terminal of cable aperture and tower base cabinet, 3 power electric cables join through cable aperture and X0/400, notice that this binding post should crimping become aciculiform binding post, with upper connecting terminal, should fully contact, check that whether distribution is wrong, confirm crimp type terminal non-loosening, the fastening regulation position that is arranged on, after above wiring is errorless on inspection, close and be positioned at the circuit breaker of the dry-type transformer in case change.
After dropping into this equipment, high order harmonic component obviously reduces, and unit is without driftage disorderly closedown phenomenon, each device temperature temperature, capacitor temperature: 25 ℃; Binding post: 41 ℃; Device body: 39 ℃; Stube cable: 29 ℃; Protection circuit breaker: 46 ℃, ambient temperature: 10 ℃; Operation conditions is good.
Above embodiment is only for the utility model is described, but not for limiting the utility model, the equivalent variations that those skilled in the art carry out above-described embodiment, replacement are all within claim protection range.
Claims (4)
1. a wind electric field blower frequency converter filter, is characterized in that: comprise filter cabinet, be arranged on fuse base, fuse, capacitor in filter cabinet, be arranged on the earth terminal of filter cabinet bottom; Described fuse base and fuse all arrange three, and each fuse base is installed a fuse; Described capacitor adopts Y-connection, the corresponding output that connects three fusing point device seats of its tie point; The input of described fuse base connects 400V voltage side by cable; Described earth terminal is by ground cable ground connection.
2. wind electric field blower frequency converter filter according to claim 1, is characterized in that: described cable adopts 4mm
2/ 1500V wire; Described ground cable adopts 2.5mm
2/ 1500V wire.
3. wind electric field blower frequency converter filter according to claim 1, is characterized in that: described fuse specification is 400V/32A, and described capacitor specification is 400V/14kVA.
4. wind electric field blower frequency converter filter according to claim 1, is characterized in that: described filter cabinet comprises cabinet and cabinet door, and cabinet and cabinet door are bolted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320507064.1U CN203434628U (en) | 2013-08-20 | 2013-08-20 | Filtering device of draught fan frequency converter in wind power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320507064.1U CN203434628U (en) | 2013-08-20 | 2013-08-20 | Filtering device of draught fan frequency converter in wind power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203434628U true CN203434628U (en) | 2014-02-12 |
Family
ID=50063646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320507064.1U Expired - Lifetime CN203434628U (en) | 2013-08-20 | 2013-08-20 | Filtering device of draught fan frequency converter in wind power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203434628U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656073B (en) * | 2014-11-13 | 2018-07-24 | 南车株洲电力机车研究所有限公司 | A kind of current transformer of wind-driven generator and its control method |
-
2013
- 2013-08-20 CN CN201320507064.1U patent/CN203434628U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656073B (en) * | 2014-11-13 | 2018-07-24 | 南车株洲电力机车研究所有限公司 | A kind of current transformer of wind-driven generator and its control method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140212 |
|
| CX01 | Expiry of patent term |