CN101997313A - In-parallel compound filter - Google Patents
In-parallel compound filter Download PDFInfo
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- CN101997313A CN101997313A CN2009100132071A CN200910013207A CN101997313A CN 101997313 A CN101997313 A CN 101997313A CN 2009100132071 A CN2009100132071 A CN 2009100132071A CN 200910013207 A CN200910013207 A CN 200910013207A CN 101997313 A CN101997313 A CN 101997313A
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- circuit
- compound filter
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- parallel compound
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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
- Y02E40/20—Active power filtering [APF]
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Abstract
The invention relates to an in-parallel compound filter, belongs to the field of analog circuits, and relates to the improvement on the in-parallel compound filter. In the in-parallel compound filter provided by the invention, a nonlinear load is a main harmonic source, and the harmonic source generates harmonic waves and consumes reactive power; an active filtering part in the in-parallel compound filter is the core of an integral circuit and is connected with a transmission line by a connection inductor, and the inside of the active filtering part is divided into two parts, wherein one part is used for detecting the voltage and current of a compensation object and working out the harmonic waves of the circuit and reactive current component through corresponding calculation; and the other part is a compensating current generating circuit, a corresponding command signal is obtained according to a corresponding signal detected by a detection circuit, and thus, an actual compensating current is generated.
Description
Technical field:
The invention belongs to the analog circuit field, relate to a kind of improvement of compound filter in parallel.
Background technology:
In recent years, along with increasing power electronic equipment and extensive use non-linear, impact equipment, the harmonic pollution in the electrical network is on the rise.The appearance of harmonic wave not only makes the Efficiency Decreasing of electrical energy production, transmission and utilization, but also can destroy or affect the normal operation of consumer on every side, disturbs radio communication, thus the harm that causes the people to know together.Therefore, harmonic restraint and filtering are caused people's concern day by day.
Suppress harmonic wave and mainly contain two basic measures: the one, power electronic equipment is transformed, reduce the generation of harmonic wave as far as possible; The 2nd, the harmonic compensation device is installed is come compensation harmonic, filter perhaps is installed with harmonic filtration.It is at present domestic that to be used to suppress harmonic wave and to regulate idle conventional method at this grade of power distribution network be to adopt passive filter (the Passive Filter that is made up of reactor and capacitor, be abbreviated as PF), but this worry ripple device generally only is applicable to the harmonic wave of compensation fixed frequency, its specific aim is stronger, filter effect can be subjected to the influence of electric network impedance and running status, when serious in addition can and circuit in other element generation resonance, thereby cause the amplification of harmonic wave.
Summary of the invention:
The present invention is exactly at the problems referred to above, and a kind of compound filter in parallel is provided.
For achieving the above object, the present invention adopts following technical scheme, nonlinear load of the present invention is main harmonic source, it produces harmonic wave and consume reactive power, active power filtering in the mixed filtering device in parallel partly is the core of whole circuit, it is connected with transmission line of electricity by connecting inductance, and its inside is divided into again the two large divisions: a part is for detection of the voltage and current of target compensation, and the corresponding computing of process calculates circuit harmonizing wave and reactive current component; Another part is the offset current circuit for generating, mainly draws corresponding command signal according to the detected corresponding signal of testing circuit, thereby produces actual offset current.
Beneficial effect of the present invention:
Active filter of the present invention need to be connected with transmission line of electricity by connecting inductance, it is main because the electric current in the inductance can not suddenly change, and the current transformer in the active filter can produce ripple current in the unsteady flow process, connect inductance and can eliminate ripple current (being the higher hamonic wave composition) and meet the people, thereby play the effect of flat ripple.Yet the existence that connects inductance also can have influence on active filter to the tracking velocity of current signal in the transmission line.For the filtering ripple current, the sense value that requires to connect inductance will be tried one's best greatly; But if require active filter to follow the tracks of real-time current signal in the transmission line, the sense value that connects inductance just must be smaller.In order to have this 2 point concurrently, on the basis of satisfying the tracking velocity requirement, the filtering ripple current composition of also will trying one's best, so, the sense value that connects inductance just must obtain moderate.
Description of drawings:
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment:
Nonlinear load of the present invention is main harmonic source, it produces harmonic wave and consume reactive power, active power filtering in the mixed filtering device in parallel partly is the core of whole circuit, it is connected with transmission line of electricity by connecting inductance, its inside is divided into again the two large divisions: a part is for detection of the voltage and current of target compensation, and the corresponding computing of process calculates circuit harmonizing wave and reactive current component; Another part is the offset current circuit for generating, mainly draws corresponding command signal according to the detected corresponding signal of testing circuit, thereby produces actual offset current.
Claims (1)
1. compound filter in parallel, it is characterized in that nonlinear load of the present invention is main harmonic source, it produces harmonic wave and consume reactive power, active power filtering in the mixed filtering device in parallel partly is the core of whole circuit, it is connected with transmission line of electricity by connecting inductance, its inside is divided into again the two large divisions: a part is for detection of the voltage and current of target compensation, and the corresponding computing of process calculates circuit harmonizing wave and reactive current component; Another part is the offset current circuit for generating, mainly draws corresponding command signal according to the detected corresponding signal of testing circuit, thereby produces actual offset current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100132071A CN101997313A (en) | 2009-08-18 | 2009-08-18 | In-parallel compound filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100132071A CN101997313A (en) | 2009-08-18 | 2009-08-18 | In-parallel compound filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101997313A true CN101997313A (en) | 2011-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100132071A Pending CN101997313A (en) | 2009-08-18 | 2009-08-18 | In-parallel compound filter |
Country Status (1)
| Country | Link |
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| CN (1) | CN101997313A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104054244A (en) * | 2012-01-12 | 2014-09-17 | 艾尼宏斯股份有限公司 | Power saving apparatus having function of improving power quality and power saving method thereof |
| US9042847B2 (en) | 2012-11-08 | 2015-05-26 | Hauwei Technologies Co., Ltd. | Filter, receiver, transmitter and transceiver |
| CN107611983A (en) * | 2017-09-30 | 2018-01-19 | 中国电力科学研究院 | A kind of integration apparatus for realizing error compensation power supply |
| CN109167360A (en) * | 2018-08-31 | 2019-01-08 | 山东农业大学 | A kind of electric automobile charging station filter and its Parameters design |
| CN112557788A (en) * | 2020-11-26 | 2021-03-26 | 国网河南省电力公司电力科学研究院 | Parallel active power filter performance detection method considering power grid strength |
-
2009
- 2009-08-18 CN CN2009100132071A patent/CN101997313A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104054244A (en) * | 2012-01-12 | 2014-09-17 | 艾尼宏斯股份有限公司 | Power saving apparatus having function of improving power quality and power saving method thereof |
| US9042847B2 (en) | 2012-11-08 | 2015-05-26 | Hauwei Technologies Co., Ltd. | Filter, receiver, transmitter and transceiver |
| CN107611983A (en) * | 2017-09-30 | 2018-01-19 | 中国电力科学研究院 | A kind of integration apparatus for realizing error compensation power supply |
| CN109167360A (en) * | 2018-08-31 | 2019-01-08 | 山东农业大学 | A kind of electric automobile charging station filter and its Parameters design |
| CN112557788A (en) * | 2020-11-26 | 2021-03-26 | 国网河南省电力公司电力科学研究院 | Parallel active power filter performance detection method considering power grid strength |
| CN112557788B (en) * | 2020-11-26 | 2022-04-29 | 国网河南省电力公司电力科学研究院 | Parallel active power filter performance detection method considering power grid strength |
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| C06 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Wang Dewei Document name: Notification of Publication of the Application for Invention |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110330 |