CN202759235U - High-precision quick-response active power filter - Google Patents
High-precision quick-response active power filter Download PDFInfo
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- CN202759235U CN202759235U CN2012203977486U CN201220397748U CN202759235U CN 202759235 U CN202759235 U CN 202759235U CN 2012203977486 U CN2012203977486 U CN 2012203977486U CN 201220397748 U CN201220397748 U CN 201220397748U CN 202759235 U CN202759235 U CN 202759235U
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- power filter
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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 utility model provides a high-precision quick-response active power filter, comprising a first DSC (digital signal controller) used for harmonic current detection and calculation, and a second DSC which is interconnected with the first DSC and used for power adjustment control, wherein the first DSC is interconnected with a current detection circuit, a DC side voltage detection circuit and an A-phase voltage zero-crossing detection circuit through a high-speed A/D circuit, and the second DSC is interconnected with a main circuit module through a PWM signal generator and a digital isolator in sequence. The active power filter provided by the utility model adopts a DSC+DSC framework, can realize complex algorithms, and can improve the filtering and compensation performances. The harmonic current detection and calculation are carried out by using a DSC chip (model: DSPIC33FJ256GP710) from the Microchip Technology Inc., and the power adjustment control is realized by using another DSC chip of the same model, the calculation and control are separated, the calculation speed is faster and the real-time compensation performance is better.
Description
Technical field
The utility model relates to the Active Power Filter-APF of a kind of high accuracy, fast-response.
Background technology
In the power industry of existing state, nearly all be to adopt sinusoidal supply power mode.In desirable electric power system, power supply with the sinusoidal variations rule of single constant frequency (50 or 60HZ) to mains supply.Along with the progress of society and science and technology, it is increasingly extensive that power electronic device is used, and the loads such as rectifier, arc furnace, RHVC, electric railway use in the power distribution network constantly increases, so that the voltage in the electrical network, current waveform distorted.In the waveform of these electric currents and voltage, not only comprise the sinusoidal quantity (being called fundametal compoment) with the power supply same frequency, and the component sine waves that a series of frequencies are the fundamental frequency integral multiple (higher harmonic components) have appearred, these a series of sinusoidal components are referred to as electric harmonic, have also caused simultaneously the series of problems such as the reduction of system power factor, voltage fluctuation, flickering and three-phase imbalance.Mains by harmonics content increases; caused the electric equipment lost of life; network loss strengthens; the possibility of system's generation harmonic resonance increases; shunt capacitor can not normally move; may cause simultaneously the non-fault sexual act of relaying protection and automatics, cause instrument indication and electric energy metrical inaccurate, computer, communicating by letter the series of problems such as is disturbed.Various faults and accident by harmonic wave causes have caused unnecessary loss to national economy and production, life, how to address this problem, and be the technical barrier of this area.
The utility model content
The technical problems to be solved in the utility model provides a kind of simple in structure, high accuracy that precision is higher, the response time is fast, the real-Time Compensation performance is higher, the Active Power Filter-APF of fast-response.
For addressing the above problem, the high accuracy that the utility model provides, the Active Power Filter-APF of fast-response comprise: be used for the DSC(digital signal controller that harmonic current detects and calculates), link to each other with a DSC be used for the 2nd DSC that electric adjustment is controlled; A described DSC links to each other with current detection circuit, dc voltage testing circuit and A phase voltage zero cross detection circuit by the high-speed a/d circuit, and described the 2nd DSC links to each other with main circuit module through pwm signal generator, digital isolator successively.
Further, described current detection circuit comprises current transformer, and this current transformer is the Luo-coil current transformer.
Described the 2nd DSC is connected with the keyboard for the LCD of operation display interface and control target power factor and output current.
Particularly; described main circuit module comprises: six way switch type power devices; and the gate drive circuit that links to each other with each switching mode power device and protection logical circuit, wherein, the switching mode power device adopts the high speed igbt (IGBT) of 30KHZ switching frequency.
The technique effect that the utlity model has:
(1) Active Power Filter-APF of high accuracy of the present utility model, fast-response adopts the DSC+DSC framework, can realize complicated algorithm, improves filtering and compensation performance.Carrying out harmonic current with the DSC chip (model is DSPIC33FJ256GP710) of 1 little core company detects and calculates, realize electric adjustment control with the DSC chip of other 1 same model, realize that computing separates with control, make computational speed faster, the real-Time Compensation performance is better.
(2) main circuit module is integrated six way switch type power devices; and embedded gate drive circuit and protection logical circuit; wherein the switching mode power device adopts the High Speed I GBT of 30KHz switching frequency, and the response speed that system's adaptation load power changes can be less than 20ms.
(3) adopt the Luo-coil current transformer to detect electric current, iron-core-free can be avoided because the function that the magnetic saturation that iron core produces causes, and adopts simultaneously the high-speed a/d of 16 250KHz, and harmonic current detection real-time is stronger, and compensation precision is higher.
(4) be furnished with LCD display and keyboard, can show in real time various parameters of electric power values, can carry out real time fail record and warning, target power factor and output current can be by the keyboard settings.
(5) adopt digital isolator to isolate between main circuit and the PWM, have low in energy consumption, reliability strong, the transmission rate advantages of higher.
Description of drawings
For content of the present utility model is more likely to be clearly understood, below the specific embodiment and by reference to the accompanying drawings of basis, the utility model is described in further detail, wherein
Fig. 1 is the circuit structure block diagram of Active Power Filter-APF of the present utility model.
Embodiment
See Fig. 1, the high accuracy that the present embodiment provides, the Active Power Filter-APF of fast-response comprise: be used for the DSC(digital signal controller that harmonic current detects and calculates), link to each other with a DSC be used for the 2nd DSC that electric adjustment is controlled; A described DSC links to each other with current detection circuit, dc voltage testing circuit and A phase voltage zero cross detection circuit by the high-speed a/d circuit, and described the 2nd DSC links to each other with main circuit module through pwm signal generator, digital isolator successively
Described current detection circuit comprises current transformer, and this current transformer is the Luo-coil current transformer.
Described main circuit module comprises: six way switch type power devices; and the gate drive circuit that links to each other with each switching mode power device and protection logical circuit, wherein the switching mode power device adopts the high speed igbt (IGBT) of 30KHZ switching frequency.
Described the 2nd DSC is connected with the keyboard for the LCD of operation display interface and control target power factor and output current.
During work, current transformer detect load current send into a DSC through high-speed a/d circuit (high-speed AD converter), the one DSC carries out harmonic current and detects and calculate, then send to the 2nd DSC, the 2nd DSC extracts the harmonic components in the load current, send to the pwm signal generator, the pwm signal that the pwm signal generator is produced corresponding duty ratio sends to the IGBT drive circuit in the main circuit module, control inverter in the main circuit module produces one and load harmonic current equal and opposite in direction, the harmonic current injection of opposite direction reaches the purpose of filtering in electrical network.
Obviously, above-described embodiment only is for the utility model example clearly is described, and is not to be restriction to execution mode of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all execution modes exhaustive.And these belong to apparent variation or the change that spirit of the present utility model extended out and still are among the protection range of the present utility model.
Claims (3)
1. the Active Power Filter-APF of a high accuracy, fast-response is characterized in that comprising: be used for the first digital signal controller that harmonic current detects and calculate, link to each other with this first digital signal controller be used for the second digital signal controller that electric adjustment is controlled;
Described the first digital signal controller links to each other with current detection circuit, dc voltage testing circuit and A phase voltage zero cross detection circuit by the high-speed a/d circuit;
Described the second digital signal controller links to each other with main circuit module through pwm signal generator, digital isolator successively.
2. the Active Power Filter-APF of high accuracy according to claim 1, fast-response, it is characterized in that: described current detection circuit comprises current transformer, this current transformer is the Luo-coil current transformer.
3. the Active Power Filter-APF of high accuracy according to claim 1, fast-response is characterized in that: described the second digital signal controller is connected with the keyboard for the LCD of operation display interface and control target power factor and output current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203977486U CN202759235U (en) | 2012-08-10 | 2012-08-10 | High-precision quick-response active power filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203977486U CN202759235U (en) | 2012-08-10 | 2012-08-10 | High-precision quick-response active power filter |
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| Publication Number | Publication Date |
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| CN202759235U true CN202759235U (en) | 2013-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012203977486U Expired - Fee Related CN202759235U (en) | 2012-08-10 | 2012-08-10 | High-precision quick-response active power filter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869159A (en) * | 2014-02-25 | 2014-06-18 | 苏州美高立电气有限公司 | Harmonic detection device |
| CN106849084A (en) * | 2017-03-16 | 2017-06-13 | 太原理工大学 | Net side fundamental active forward-order current feedforward APF DC voltage fluctuation suppressing methods |
-
2012
- 2012-08-10 CN CN2012203977486U patent/CN202759235U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869159A (en) * | 2014-02-25 | 2014-06-18 | 苏州美高立电气有限公司 | Harmonic detection device |
| CN106849084A (en) * | 2017-03-16 | 2017-06-13 | 太原理工大学 | Net side fundamental active forward-order current feedforward APF DC voltage fluctuation suppressing methods |
| CN106849084B (en) * | 2017-03-16 | 2019-05-28 | 太原理工大学 | Net side fundamental active forward-order current feedforward APF DC voltage fluctuation suppressing method |
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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: 20130227 Termination date: 20150810 |
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| EXPY | Termination of patent right or utility model |