CN107437805A - A kind of Active Power Filter-APF - Google Patents
A kind of Active Power Filter-APF Download PDFInfo
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- CN107437805A CN107437805A CN201610362397.8A CN201610362397A CN107437805A CN 107437805 A CN107437805 A CN 107437805A CN 201610362397 A CN201610362397 A CN 201610362397A CN 107437805 A CN107437805 A CN 107437805A
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- regulator
- inverter
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- apf
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- 238000001514 detection method Methods 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 230000005611 electricity Effects 0.000 claims description 4
- 238000001914 filtration Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000000284 extract Substances 0.000 abstract description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Power Conversion In General (AREA)
Abstract
The present invention relates to a kind of Active Power Filter-APF, between power supply and load, including high-pass filter, input switch, bus soft start resistance, inductance, inverter, bus capacitor, Harmonic currents detection device, first pi regulator, second pi regulator, coordinate converter, PWM generator and PLL phaselocked loops, this Active Power Filter-APF detects load current in real time by foreign current transformer, and calculated by internal DSP, extract the harmonic components of load current, then internal IGBT is sent to by pwm signal, control inverter generation one and load harmonic current equal in magnitude, harmonic current injection in opposite direction is into power network, reach filtering purpose.The beneficial effects of the present invention are：Compare with passive filter, high pressure harmonic wave control effect is good, can filter out multiple and higher hamonic wave simultaneously, will not cause resonance, safe and reliable.
Description
Technical field
The present invention relates to technical field of power communication, more particularly to a kind of Active Power Filter-APF.
Background technology
Active Power Filter-APF (APF：Active power filter) be it is a kind of be used for dynamic harmonic wave, compensating reactive power
Novel electric power electric device, it can carry out quick tracing compensation to the harmonic wave of different size and frequency, why referred to as active,
Be relative to passive LC filter, can only be for the harmonic wave of Passive intake fixed frequency and size, APF can pass through sampling
Load current simultaneously carries out each harmonic and idle separation, controls size, frequency and the phase of simultaneously active output current, and
Quick response, phase induced current in load is offset, realizes dynamic tracing compensation, and can not only mended harmonic wave but also mend idle and not
Balance.
The content of the invention
In view of this, it is an object of the invention to provide a kind of Active Power Filter-APF, to solve deficiency of the prior art.
In order to achieve the above object, the purpose of the present invention is achieved through the following technical solutions：
A kind of Active Power Filter-APF, between power supply and load, wherein, including high-pass filter, input switch, mother
Line soft start resistance, inductance, inverter, bus capacitor, Harmonic currents detection device, the first pi regulator, the 2nd PI
Adjuster, coordinate converter, PWM generator and PLL phaselocked loops, the high-pass filter and be connected to it is described input open
The bus soft start resistance, the inductance, the inverter, the bus capacitor closed is sequentially connected in series, external loading electricity
The input of the PLL phaselocked loops is crimped, external loading electric current meets the input of the Harmonic currents detection device, the mother
First pi regulator is inputted after the output of line capacitance and the mutual convolution of external dc voltage, first pi regulator
The input of output and the output of the PLL phaselocked loops as the coordinate converter, the output of the coordinate converter and institute
State the input as second pi regulator after the mutual convolution of output of Harmonic currents detection device, second pi regulator,
The PWM generator and the inverter are sequentially connected, and the PWM generator is in the form of pulse-width signal to described
Inverter sends out driving pulse, and equal with mains by harmonics current amplitude, opposite polarity compensation electric current injection electricity is generated with driving
Net.
Above-mentioned Active Power Filter-APF, wherein, the inverter is three-phase half-bridge inverter, is made up of IGBT module.
Above-mentioned Active Power Filter-APF, wherein, the Harmonic currents detection device is made up of FFT and IFFT.
Compared with the prior art, the beneficial effects of the present invention are：
Compare with passive filter, high pressure harmonic wave control effect is good, can filter out multiple and higher hamonic wave simultaneously, will not cause
Resonance, it is safe and reliable.
Brief description of the drawings
The accompanying drawing for forming the part of the present invention is used for providing a further understanding of the present invention, illustrative examples of the invention
And its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 shows the structural representation of Active Power Filter-APF of the present invention；
Fig. 2 shows the topological diagram of Active Power Filter-APF of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly and completely
Description, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example is applied, belongs to the scope of protection of the invention.
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the present invention can be mutual group
Close.
With reference to shown in figure 1, Active Power Filter-APF of the present invention, between power supply 1 and load 2, including high-pass filtering
Device 3, input switch 4, bus soft start resistance 5, inductance 6, inverter 7, bus capacitor 8, Harmonic currents detection device,
First pi regulator 9, the second pi regulator 10, coordinate converter 11, PWM generator 12 and PLL phaselocked loops
13, high-pass filter 3 is simultaneously connected to the bus soft start resistance 5 of input switch 4, inductance 6, inverter 7, bus electricity
Hold 8 to be sequentially connected in series, external loading voltage connects the input of PLL phaselocked loops 13, and external loading electric current connects Harmonic currents detection
The input of device, the output of bus capacitor 8 is with inputting the first pi regulator 9 after the mutual convolution of external dc voltage, and first
The input of the output of pi regulator 9 and the output of PLL phaselocked loops 13 as coordinate converter 11, coordinate converter 11
Output and Harmonic currents detection device the mutual convolution of output after input as the second pi regulator 10, the 2nd PI adjusts
Device 10, PWM generator 12 and inverter 7 are sequentially connected.PWM generator 12 is used for the arteries and veins for adjusting harmonic current
Width,
Specifically, inverter 7 is three-phase half-bridge inverter, is made up of IGBT module, Harmonic currents detection device is by FFT14
Formed with IFFT15.High-pass filter 3 in figure is used for the switching harmonics for filtering out inverter 7, and input switch 4 is used to break
The power current between inverter 7 and power supply 1 is opened, in system boot, power supply 1 is right by bus soft start resistance 5
Bus capacitor 8 charges, and implements bus soft start.Bus capacitor 8 provides stable direct current for the normal work of inverter 7
Voltage, buffering is idle, and PLL phaselocked loops 13 are used for the frequency and phase for obtaining line voltage.The He of first pi regulator 9
Second pi regulator 10 is by using the closed-loop control for realizing voltage and current.PWM generator 12 generates PWM
Signal drives the IGBT of inverter 7.With continued reference to shown in Fig. 1 and Fig. 2, this Active Power Filter-APF passes through foreign current
Transformer detects load current in real time, analog current signal is converted into data signal, and signal is entered by internal DSP
Row processing, harmonic wave is separated with fundamental wave, extracts the harmonic components of load current, is then sent to by pwm signal interior
Portion IGBT, control inverter 7 drive IGBT generations one and network load harmonic current equal in magnitude, in opposite direction
Harmonic current injection is compensated or offset to harmonic current into power network, actively eliminates electric harmonic, reaches filtering purpose.
From above-described embodiment as can be seen that advantage of the invention is that：
Compare with passive filter, high pressure harmonic wave control effect is good, can filter out multiple and higher hamonic wave simultaneously, will not cause
Resonance, it is safe and reliable.
The specific embodiment of the present invention is described in detail above, but the present invention is not restricted to specific reality described above
Example is applied, it is intended only as example.To those skilled in the art, any equivalent modifications and replacement are also all the present invention's
Among category.Therefore, made impartial conversion and modification without departing from the spirit and scope of the invention, should all cover
In the scope of the present invention.
Claims (3)
1. a kind of Active Power Filter-APF, between power supply (1) and load (2), it is characterised in that including high pass
Wave filter (3), input switch (4), bus soft start resistance (5), inductance (6), inverter (7), bus
Electric capacity (8), Harmonic currents detection device, the first pi regulator (9), the second pi regulator (10), coordinate transform
Device (11), PWM generator (12) and PLL phaselocked loops (13), the high-pass filter (3) are simultaneously connected to institute
State the bus soft start resistance (5) of input switch (4), the inductance (6), the inverter (7), institute
State bus capacitor (8) to be sequentially connected in series, external loading voltage connects the input of the PLL phaselocked loops (13), external loading
Electric current connects the input of the Harmonic currents detection device, and the output of the bus capacitor (8) is mutually rolled up with external dc voltage
First pi regulator (9), the output of first pi regulator (9) and the PLL phaselocked loops (13) are inputted after product
Input of the output as the coordinate converter (11), output and the harmonic wave electricity of the coordinate converter (11)
Input after the mutual convolution of output of current sensor as second pi regulator (10), second pi regulator
(10), the PWM generator (12) and the inverter (7) are sequentially connected, the PWM generator (12)
Driving pulse is sent out to the inverter (7) in the form of pulse-width signal, with driving generation and mains by harmonics current amplitude
Equal, opposite polarity compensation electric current injection power network.
2. Active Power Filter-APF as claimed in claim 1, it is characterised in that the inverter (7) is three-phase half-bridge
Inverter, it is made up of IGBT module.
3. Active Power Filter-APF as claimed in claim 1, it is characterised in that the Harmonic currents detection device is by FFT (14)
Formed with IFFT (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610362397.8A CN107437805A (en) | 2016-05-26 | 2016-05-26 | A kind of Active Power Filter-APF |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610362397.8A CN107437805A (en) | 2016-05-26 | 2016-05-26 | A kind of Active Power Filter-APF |
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| Publication Number | Publication Date |
|---|---|
| CN107437805A true CN107437805A (en) | 2017-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610362397.8A Pending CN107437805A (en) | 2016-05-26 | 2016-05-26 | A kind of Active Power Filter-APF |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111025056A (en) * | 2019-12-06 | 2020-04-17 | 深圳市优优绿能电气有限公司 | Power grid parameter detection method based on trigonometric function characteristics and readable storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101127441A (en) * | 2007-07-31 | 2008-02-20 | 湖南大学 | Current and DC side voltage control method for injected mixed active power filter |
| CN101159379A (en) * | 2007-04-30 | 2008-04-09 | 湖南大学 | Mixed active electric power filter and direct current side voltage control method thereof |
| CN102611108A (en) * | 2012-03-09 | 2012-07-25 | 湖南大学 | Three-level three-phase four-wire active power filter and control method thereof |
| CN105281337A (en) * | 2015-10-22 | 2016-01-27 | 国家电网公司 | Voltage supporting and compensating circuit |
| CN205646824U (en) * | 2016-05-26 | 2016-10-12 | 萨顿斯（上海）电源有限公司 | Novel active electric power filter |
-
2016
- 2016-05-26 CN CN201610362397.8A patent/CN107437805A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159379A (en) * | 2007-04-30 | 2008-04-09 | 湖南大学 | Mixed active electric power filter and direct current side voltage control method thereof |
| CN101127441A (en) * | 2007-07-31 | 2008-02-20 | 湖南大学 | Current and DC side voltage control method for injected mixed active power filter |
| CN102611108A (en) * | 2012-03-09 | 2012-07-25 | 湖南大学 | Three-level three-phase four-wire active power filter and control method thereof |
| CN105281337A (en) * | 2015-10-22 | 2016-01-27 | 国家电网公司 | Voltage supporting and compensating circuit |
| CN205646824U (en) * | 2016-05-26 | 2016-10-12 | 萨顿斯（上海）电源有限公司 | Novel active electric power filter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111025056A (en) * | 2019-12-06 | 2020-04-17 | 深圳市优优绿能电气有限公司 | Power grid parameter detection method based on trigonometric function characteristics and readable storage medium |
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