CN203813435U - Active electric power filter - Google Patents
Active electric power filter Download PDFInfo
- Publication number
- CN203813435U CN203813435U CN201420205118.3U CN201420205118U CN203813435U CN 203813435 U CN203813435 U CN 203813435U CN 201420205118 U CN201420205118 U CN 201420205118U CN 203813435 U CN203813435 U CN 203813435U
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- China
- Prior art keywords
- circuit
- signal
- power filter
- apf
- active power
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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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- Power Conversion In General (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model discloses an active electric power filter including a signal acquisition processor, a response signal processor, a signal sampling circuit and an inverter circuit. The signal sampling circuit is connected with the signal acquisition processor. The signal acquisition processor is connected with the response signal processor. The response signal processor is connected with the inverter circuit through an inverter drive circuit. The signal sampling circuit and the inverter circuit are electrically connected on an electric power line. According to the active electric power filter, signal detection operation and control are controlled by individual controllers respectively, and thus the stability of a filter system is ensured.
Description
Technical field
The present invention relates to Active Power Filter-APF, electric filtering equipment technical field.
Background technology
Because the use of the multiple electrical equipment of factor and family of electric power system self can affect the normal work of electric power system, electric power system is caused to certain impact and unbalanced by electrical characteristics; The harmonic wave that particularly the various harmonic sources in electric power system produce has also caused serious pollution to power system environment; Especially the increasingly extensive application of the nonlinear load such as power electronic equipment, the harmonic wave of its generation and idle electricity quality has been produced to very large impact; Traditional electrical network filter apparatus is passive filter, due to advantages such as cost are lower, simple in structure, reliable, easy to maintenance, be widely applied, it is the main method of current electricity supplying and using system harmonic wave inhibition and reactive power compensation, but it also has some shortcomings: but its volume is large, and filter effect and running situation are closely related, under specific circumstances passive filter may with system generation resonance; Therefore, only rely on passive filtering technology governance harmonic wave in the past can not meet the demands, must utilize this new technology of active power filtering to carry out filtering to electrical network; Some institution of higher learning of China, scientific research institutions and fewer companies have been carried out the research of Active Power Filter-APF in succession at present; But mostly also in emulation and low capacity experimental prototype conceptual phase, industrial only have several model machines to drop into trial run, and compensation effect is also unsatisfactory, and stability is also poor; Be difficult to be applied in actual electrical network.
Summary of the invention
In order to address the above problem, the present invention proposes a kind of Active Power Filter-APF, input computing and control have respectively separate controller control, ensure the stability of filtering system.
Active Power Filter-APF of the present invention, comprises that signal acquisition process device, response signal processor, signal sample circuit and inverter circuit form; Described signal sample circuit connects signal acquisition process device; Described signal acquisition process device connection response signal processor; Described response signal processor connects inverter circuit by inverse changing driving circuit; On described signal sample circuit and inverter circuit electrical connection power line.
Further, described signal sample circuit is made up of signal zero passage comparison circuit and current sampling circuit.
Further, described signal zero passage comparison circuit output electrical connection current sampling circuit; Described current sampling circuit is connected on signal acquisition process device by current-to-voltage converting circuit.
Further, described inverter circuit is by three-phase full-controlled bridge drive circuit and three-phase full-controlled bridge the electric circuit constitute.
Further, described drive circuit is made up of inverter and drive unit.
Compared with prior art, it has following beneficial effect in the present invention: Active Power Filter-APF of the present invention, and input computing and control have respectively separate controller control, ensure the stability of filtering system; Improved the response time of filter simultaneously; Compensation effect is obvious; Work by two-shipper in addition, affected by electric network impedance little.
Brief description of the drawings
Fig. 1 is integrated circuit structured flowchart of the present invention.
Fig. 2 is embodiments of the invention circuit structure block diagram.
Embodiment
Active Power Filter-APF principle of the present invention is to utilize two-shipper to control, and one is carried out data acquisition and computing, and operation result is transferred to another controller, controller control and compensation circuit working.。
As depicted in figs. 1 and 2, Active Power Filter-APF of the present invention, comprises that signal acquisition process device, response signal processor, signal sample circuit and inverter circuit form; Described signal sample circuit connects signal acquisition process device; Described signal acquisition process device connection response signal processor; Described response signal processor connects inverter circuit by inverse changing driving circuit; On described signal sample circuit and inverter circuit electrical connection power line.
Described signal sample circuit is made up of signal zero passage comparison circuit and current sampling circuit; Described signal zero passage comparison circuit output electrical connection current sampling circuit; Described current sampling circuit is connected on signal acquisition process device by current-to-voltage converting circuit; Described current-to-voltage converting circuit is made up of precision resistance, is sampling voltage by the voltage at precision resistance two ends.Described inverter circuit is by three-phase full-controlled bridge drive circuit and three-phase full-controlled bridge the electric circuit constitute; Described drive circuit is made up of inverter and drive unit.
Active Power Filter-APF of the present invention, input computing and control have respectively separate controller control, ensure the stability of filtering system; Improved the response time of filter simultaneously; Compensation effect is obvious; Work by two-shipper in addition, affected by electric network impedance little.
Embodiment recited above is described the preferred embodiment of the present invention, not the spirit and scope of the present invention is limited.Do not departing under the prerequisite of design concept of the present invention; various modification and improvement that this area ordinary person makes technical scheme of the present invention; all should drop into protection scope of the present invention, the technology contents of request protection of the present invention, has all been documented in claims.
Claims (5)
1. an Active Power Filter-APF, is characterized in that, comprises that signal acquisition process device, response signal processor, signal sample circuit and inverter circuit form; Described signal sample circuit connects signal acquisition process device; Described signal acquisition process device connection response signal processor; Described response signal processor connects inverter circuit by inverse changing driving circuit; On described signal sample circuit and inverter circuit electrical connection power line.
2. according to the Active Power Filter-APF described in claim 1, it is characterized in that, described signal sample circuit is made up of signal zero passage comparison circuit and current sampling circuit.
3. according to the Active Power Filter-APF described in claim 1 or 2, it is characterized in that described signal zero passage comparison circuit output electrical connection current sampling circuit; Described current sampling circuit is connected on signal acquisition process device by current-to-voltage converting circuit.
4. according to the Active Power Filter-APF described in claim 1, it is characterized in that, described inverter circuit is by three-phase full-controlled bridge drive circuit and three-phase full-controlled bridge the electric circuit constitute.
5. according to the Active Power Filter-APF described in claim 1, it is characterized in that, described drive circuit is made up of inverter and drive unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420205118.3U CN203813435U (en) | 2014-04-25 | 2014-04-25 | Active electric power filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420205118.3U CN203813435U (en) | 2014-04-25 | 2014-04-25 | Active electric power filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203813435U true CN203813435U (en) | 2014-09-03 |
Family
ID=51452143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420205118.3U Expired - Fee Related CN203813435U (en) | 2014-04-25 | 2014-04-25 | Active electric power filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203813435U (en) |
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2014
- 2014-04-25 CN CN201420205118.3U patent/CN203813435U/en not_active Expired - Fee Related
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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: 20140903 Termination date: 20150425 |
|
| EXPY | Termination of patent right or utility model |