CN201797317U - Power grid harmonic suppression device - Google Patents
Power grid harmonic suppression device Download PDFInfo
- Publication number
- CN201797317U CN201797317U CN2010202199214U CN201020219921U CN201797317U CN 201797317 U CN201797317 U CN 201797317U CN 2010202199214 U CN2010202199214 U CN 2010202199214U CN 201020219921 U CN201020219921 U CN 201020219921U CN 201797317 U CN201797317 U CN 201797317U
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- harmonic
- current
- power grid
- sent
- frequency
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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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 relates to a power grid harmonic suppression device. A resonant filter and a current transformer are mounted on a power grid line with harmonics, a portion of fixed-frequency harmonics is filtered at first, current signals are detected and sent to a resonant analyzer via a shielded cable, frequency, amplitude and phase of various harmonic current are acquired through analysis and then sent to an instruct generation module to generate frequency, amplitude and phase control instructs for harmonic compensation, the generated instructs are sent to a harmonic compensation generation control module to generate actual compensating harmonic current with the same frequency and altitude and reverse phase, and the generated current is then sent back to a power grid to be superposed with the original harmonic current, so that the harmonics are canceled out, and the purpose of power grid harmonic suppression is achieved.
Description
Technical field:
The utility model relates to a kind of power network harmonic wave management device, can eliminate power consumption equipment, belong to the intelligent grid technical field to the various harmonic pollutions that electrical network brings.
Background technology:
At present, frequency converter is widely used, because the switching characteristic of inverter circuit is brought serious harmonic pollution to electrical network, simultaneously, generator, electrical power trans mission/distribution system, power consumption equipment etc. also can bring the harmonic wave of different brackets, usually make the transducer that moves simultaneously with it, precision instrument, measuring equipment, communication apparatus etc. that phenomenons such as serious data drift, dropout, electric energy loss increase, misoperation can take place, cause economic loss and security incident when serious.
Summary of the invention:
In order to overcome the severe contamination of harmonic wave to electrical network, the utility model provides a kind of power network harmonic wave management device, and it can detect the existence of various harmonic waves, and can thoroughly eliminate the pollution of these harmonic waves, guarantees and the raising grid supply quality.
The technical scheme that its technical problem that solves the utility model adopts is:
The power network harmonic wave management device is made up of resonance filter, current transformer, harmonic analyzer, instruction generation module, compensation harmonic generation module; Resonance filter and current transformer are installed on the power network line, filter the partial fixing frequency harmonics, current transformer detects current signal, deliver to harmonic analyzer with shielded type cable, analysis draws the frequency of various harmonic currents, amplitude, parameters such as phase place, give the instruction generation module again, generate the needed various harmonic frequencies of a series of compensation harmonics by instruction software, amplitude, the control command of phase place, control command is sent to control compensation harmonic wave generation module, it is identical to produce frequency at this, amplitude equates, the actual compensation harmonic electric current that phase place is opposite is sent electrical network and former harmonic current stack harmonic carcellation back to.
The beneficial effects of the utility model:
Because the harmonic current in the electrical network is offset by the actual offset current that harmonic treating apparatus produces, and has ensured grid supply quality, improves electric equipment, communication apparatus reliability of operation.
Description of drawings:
Fig. 1 is a schematic block circuit diagram of the present utility model.
Among the figure: 1. power supply 2. loads 3. resonance filters 4. current transformers 5. harmonic analyzers 6. instruction generation modules 7. compensation harmonic generation modules
Further describe embodiment below in conjunction with accompanying drawing 1:
Power supply (1) is former electrical network circuit with load (2) in the drawings, individual event or three-phase all can, series resonance filter (3) is in order to filter the partial fixing frequency harmonics betwixt, load current passes current transformer (4) generation current signal and links to each other with harmonic analyzer (5), obtain the each harmonic frequency in this analysis, amplitude, phase place, deliver to instruction generation module (6), utilize instruction to generate software, draw the required control command of compensation harmonic, promptly identical with the mains by harmonics frequency, equal and opposite in direction, the control command that phase place is opposite, control compensation harmonic wave generation module (7) is sent in this instruction, the harmonic current that generates is just in time identical with the mains by harmonics power frequency, amplitude equates, phase place is opposite, sends electrical network and former harmonic current stack harmonic carcellation back to.
Claims (1)
1. power network harmonic wave management device, form by resonance filter, current transformer, harmonic analyzer, instruction generation module, compensation harmonic generation module, it is characterized in that: resonance filter and current transformer are installed on the power network line, current transformer records load current signal and delivers to harmonic analyzer, instruction generation module, compensation harmonic generation module successively, and the compensation harmonic electric current of generation is sent the electrical network main circuit back to and superposeed to reach with former harmonic current and cancel each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202199214U CN201797317U (en) | 2010-06-09 | 2010-06-09 | Power grid harmonic suppression device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202199214U CN201797317U (en) | 2010-06-09 | 2010-06-09 | Power grid harmonic suppression device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201797317U true CN201797317U (en) | 2011-04-13 |
Family
ID=43852215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202199214U Expired - Fee Related CN201797317U (en) | 2010-06-09 | 2010-06-09 | Power grid harmonic suppression device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201797317U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377947A (en) * | 2014-12-11 | 2015-02-25 | 北京乐普四方方圆科技股份有限公司 | Frequency converter harmonic wave elimination method and frequency converter harmonic wave elimination device |
| CN105954624A (en) * | 2016-06-17 | 2016-09-21 | 丰郅(上海)新能源科技有限公司 | Detection device |
-
2010
- 2010-06-09 CN CN2010202199214U patent/CN201797317U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104377947A (en) * | 2014-12-11 | 2015-02-25 | 北京乐普四方方圆科技股份有限公司 | Frequency converter harmonic wave elimination method and frequency converter harmonic wave elimination device |
| CN105954624A (en) * | 2016-06-17 | 2016-09-21 | 丰郅(上海)新能源科技有限公司 | Detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110413 Termination date: 20170609 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |