CN204068282U - Active filter - Google Patents
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- CN204068282U CN204068282U CN201420457599.7U CN201420457599U CN204068282U CN 204068282 U CN204068282 U CN 204068282U CN 201420457599 U CN201420457599 U CN 201420457599U CN 204068282 U CN204068282 U CN 204068282U
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- brachium pontis
- inverter circuit
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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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- 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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The utility model discloses a kind of active filter, comprise IGBT power model, IGBT power model comprises direct-flow input end, three-phase four-arm inverter circuit and three-phase output end, three-phase four-arm inverter circuit is in parallel with direct-flow input end, three-phase four-arm inverter circuit comprises A phase brachium pontis in parallel, B phase brachium pontis, C phase brachium pontis and center line brachium pontis, the intermediate node of A phase brachium pontis, B phase brachium pontis and C phase brachium pontis is connected to three-phase output end respectively, and the intermediate node of center line brachium pontis is connected to three-phase output end respectively by three center line branch roads.Three-phase four-arm inverter circuit is equivalent to increase a brachium pontis on phase three-wire three inverter circuit, produce neutral point voltage, neutral point current is provided to flow through path, three-phase four-arm inverter circuit is made to produce three independently voltages, three-phase output voltage is maintained symmetrical when unbalanced and nonlinear load, there is not the problem low to direct voltage utilance, operating efficiency is high and system bulk is little, efficiently solves three-phase imbalance problem.
Description
Technical field
The utility model relates to a kind of electrical equipment, and more particularly, it relates to a kind of active filter.
Background technology
Active Power Filter-APF (APF) is a kind of novel electric power electric device for dynamic harmonic wave, compensating reactive power, and the harmonic wave that it all can change size and frequency and the idle of change compensate.
As the term suggests this device needs to provide power supply (harmonic wave in order to main compensation circuit), its application can overcome the shortcoming (traditional can only fixed compensation) of traditional harmonics restraint such as LC filtration module and reactive-load compensation method, achieve dynamic tracing compensation, and not only can mend harmonic wave but also mend idle; Theory of Instantaneous Reactive Power of Three-Phase Circuits is that the main foundation of APF development is theoretical; APF has parallel connection type and tandem type two kinds, and the former is many; Parallel active filter mainly administers current harmonics, and series active power filter mainly administers the problem that voltage harmonic etc. causes.
At present, active filter on market, as application number Active Power Filter-APF disclosed in the Chinese patent of 03250303.2, it comprises IGBT power model and controller, described controller comprises the detection module, control module and the driver module that couple, and described driver module is connected with IGBT power model.Detection module is for gathering line voltage, load current and three-phase offset current, line voltage, load current and three-phase offset current that control module is used for according to collecting carry out harmonic detecting, instruction fetch and signal transacting, and then output pwm signal, driver element be used for after pwm signal power amplification with control IGBT power model, IGBT power model produces offset current, carries out reactive power compensation.This active filter, its IGBT power model generally adopts three-phase three brachium pontis inverter circuit, the topological structure be made up of 3 brachium pontis.Effectively can not solve the imbalance problem in three-phase system, and three-phase imbalance problem will have a strong impact on the quality of power supply, cause damage to equipment, in order to meet the requirement of powering to asymmetric load, output must have middle line end, and namely three-phase and four-line exports.Common scheme has: one, direct-flow input end 2 equivalent capacitances in parallel, line end during electric capacity mid point exports as three-phase, and this method easily realizes, but the utilance of direct voltage is low, inefficiency; Two, add 1 autotransformer at three-phase output end, form mid point with this transformer, but transformer adds the volume and weight of system.
Utility model content
For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of effectively can solve the high and active filter that system bulk is little of three-phase imbalance problem, operating efficiency.
For achieving the above object, the utility model provides following technical scheme: a kind of active filter, comprise IGBT power model and controller, described controller comprises the detection module of connecting successively, control module and driver module, described driver module is connected with IGBT power model, described IGBT power model comprises direct-flow input end, three-phase four-arm inverter circuit and three-phase output end, described three-phase four-arm inverter circuit is in parallel with direct-flow input end, described three-phase four-arm inverter circuit comprises A phase brachium pontis in parallel, B phase brachium pontis, C phase brachium pontis and center line brachium pontis, described A phase brachium pontis, the intermediate node of B phase brachium pontis and C phase brachium pontis is connected to three-phase output end respectively, the intermediate node of described center line brachium pontis is connected to three-phase output end respectively by three center line branch roads.
By adopting technique scheme, three-phase four-arm inverter circuit is equivalent on the basis of phase three-wire three inverter circuit in the past, increase a brachium pontis and directly controls it, produce neutral point voltage, and provide neutral point current to flow through path, make three-phase four-arm inverter circuit can produce three independently voltages, thus have the ability to maintain the symmetry of three-phase output voltage when unbalanced and nonlinear load, simple topological structure is rational control strategy in addition, namely there is not the problem low to direct voltage utilance, operating efficiency is high and system bulk is little, reliable operation, efficiently solve three-phase imbalance problem.
The utility model is set to further: be all in series with ac filter inductance between the intermediate node of described A phase brachium pontis, B phase brachium pontis and C phase brachium pontis and corresponding three-phase output end, is all in series with ac filter electric capacity between described three center line branch roads and three-phase output end.
By adopting technique scheme, ac filter circuit is formed by ac filter inductance and ac filter electric capacity, stop that also short circuit exceedes frequency own or external high-frequency ac interference component, inject three-phase input end to after current filtering, circuit is run more stable.
The utility model is set to further: be connected in series with mid point inductance between the common node of described filter capacitor and the intermediate node of center line brachium pontis.
By adopting technique scheme, when three-phase current is asymmetric, mid point inductance will flow through electric current, mid point inductance mainly plays the effect of level and smooth mid point electric current, has counterbalance effect to every phase current.
The utility model is set to further: described direct-flow input end is parallel with DC filter capacitor.
By adopting technique scheme, play when load becomes large suddenly, DC filter capacitor can provide electric current to load together with direct-flow input end, and elimination clutter, plays filter action, keeps the level and smooth of direct voltage, circuit is run more stable.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the utility model active filter embodiment.
Description of reference numerals: 1, direct-flow input end; 2, IGBT power model; 21, three-phase four-arm inverter circuit; 211, A phase brachium pontis; 212, B phase brachium pontis; 213, C phase brachium pontis; 214, center line brachium pontis; 22, ac filter inductance; 23, ac filter electric capacity; 24, mid point inductance; 3, three-phase output end; 31, DC filter capacitor; 4, controller; 41, detection module; 42, control module; 43, driver module; 5, center line branch road.
Embodiment
With reference to Fig. 1, the utility model active filter embodiment is described further.
A kind of active filter, comprise IGBT power model 2 and controller 4, described controller 4 comprises the detection module 41 of connecting successively, control module 42 and driver module 43, described driver module 43 is connected with IGBT power model 2, described IGBT power model 2 comprises direct-flow input end 1, three-phase four-arm inverter circuit 21 and three-phase output end 3, described three-phase four-arm inverter circuit 21 is in parallel with direct-flow input end 1, described three-phase four-arm inverter circuit 21 comprises A phase brachium pontis 211 in parallel, B phase brachium pontis 212, C phase brachium pontis 213 and center line brachium pontis 214, described A phase brachium pontis 211, the intermediate node of B phase brachium pontis 212 and C phase brachium pontis 213 is connected to three-phase output end 3 respectively, the intermediate node of described center line brachium pontis 214 is connected to three-phase output end 3 respectively by three center line branch roads 5.
On the books in the patent document that detection module 41, control module 42 and driver module 43 are quoted as proof in background technology, therefore do not repeat at this.
A phase brachium pontis 211, B phase brachium pontis 212, C phase brachium pontis 213 and center line brachium pontis 214 all adopt identical topological structure, it comprises IGBT module, this IGBT module its model can be adopted to be the IGBT module of 6MBI100UB-120,2MBI75S-12,2MBI100S-12 etc., the maximum load current that the rated voltage of its selection gist electrical network and equipment run and determine, those skilled in the art can know select the electric pressure of adaptation and the IGBT module of current class with knowing.
By adopting technique scheme, three-phase four-arm inverter circuit 21 is equivalent on the basis of phase three-wire three inverter circuit in the past, increase a brachium pontis and directly controls it, produce neutral point voltage, and provide neutral point current to flow through path, make three-phase four-arm inverter circuit 21 can produce three independently voltages, thus have the ability to maintain the symmetry of three-phase output voltage when unbalanced and nonlinear load, simple topological structure is rational control strategy in addition, namely there is not the problem low to direct voltage utilance, operating efficiency is high and system bulk is little, reliable operation, efficiently solve three-phase imbalance problem.
All be in series with ac filter inductance 22 between the intermediate node of described A phase brachium pontis 211, B phase brachium pontis 212 and C phase brachium pontis 213 and corresponding three-phase output end 3, between described three center line branch roads 5 and three-phase output end 3, be all in series with ac filter electric capacity 23.
By adopting technique scheme, ac filter circuit is formed by ac filter inductance 22 and ac filter electric capacity 23, stop that also short circuit exceedes frequency own or external high-frequency ac interference component, inject three-phase input end to after current filtering, circuit is run more stable.
Mid point inductance 24 is connected in series with between the common node of described filter capacitor and the intermediate node of center line brachium pontis 214.
By adopting technique scheme, when three-phase current is asymmetric, mid point inductance 24 will flow through electric current, mid point inductance 24 mainly plays the effect of level and smooth mid point electric current, has counterbalance effect to every phase current.
Described direct-flow input end 1 is parallel with DC filter capacitor 31.
By adopting technique scheme, play when load becomes large suddenly, DC filter capacitor 31 can provide electric current to load together with direct-flow input end 1, and elimination clutter, plays filter action, keeps the level and smooth of direct voltage, circuit is run more stable.
Claims (4)
1. an active filter, comprise IGBT power model and controller, described controller comprises the detection module of connecting successively, control module and driver module, described driver module is connected with IGBT power model, it is characterized in that: described IGBT power model comprises direct-flow input end, three-phase four-arm inverter circuit and three-phase output end, described three-phase four-arm inverter circuit is in parallel with direct-flow input end, described three-phase four-arm inverter circuit comprises A phase brachium pontis in parallel, B phase brachium pontis, C phase brachium pontis and center line brachium pontis, described A phase brachium pontis, the intermediate node of B phase brachium pontis and C phase brachium pontis is connected to three-phase output end respectively, the intermediate node of described center line brachium pontis is connected to three-phase output end respectively by three center line branch roads.
2. active filter according to claim 1, it is characterized in that: between the intermediate node of described A phase brachium pontis, B phase brachium pontis and C phase brachium pontis and corresponding three-phase output end, be all in series with ac filter inductance, between described three center line branch roads and three-phase output end, be all in series with ac filter electric capacity.
3. active filter according to claim 2, is characterized in that: be connected in series with mid point inductance between the common node of described filter capacitor and the intermediate node of center line brachium pontis.
4. the active filter according to claim 1 or 2 or 3, is characterized in that: described direct-flow input end is parallel with DC filter capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420457599.7U CN204068282U (en) | 2013-11-23 | 2014-08-13 | Active filter |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320740927 | 2013-11-23 | ||
| CN201320740927.X | 2013-11-23 | ||
| CN201420457599.7U CN204068282U (en) | 2013-11-23 | 2014-08-13 | Active filter |
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| Publication Number | Publication Date |
|---|---|
| CN204068282U true CN204068282U (en) | 2014-12-31 |
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| CN201420457599.7U Active CN204068282U (en) | 2013-11-23 | 2014-08-13 | Active filter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655729A (en) * | 2016-10-31 | 2017-05-10 | 广西电网有限责任公司电力科学研究院 | Low voltage output module of modular power distribution network electric power electron transformer |
| CN110061511A (en) * | 2019-04-09 | 2019-07-26 | 北京交通大学 | A kind of improvement three-phase four-arm topology for realizing active power decoupling |
| CN110098616A (en) * | 2019-05-14 | 2019-08-06 | 安徽亚辉电气自动化有限公司 | A kind of Active Power Filter-APF with remained capacity classified calculating |
| CN115642825A (en) * | 2022-11-02 | 2023-01-24 | 江苏科曜能源科技有限公司 | Three-phase five-level PWM inverter and application |
-
2014
- 2014-08-13 CN CN201420457599.7U patent/CN204068282U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655729A (en) * | 2016-10-31 | 2017-05-10 | 广西电网有限责任公司电力科学研究院 | Low voltage output module of modular power distribution network electric power electron transformer |
| CN110061511A (en) * | 2019-04-09 | 2019-07-26 | 北京交通大学 | A kind of improvement three-phase four-arm topology for realizing active power decoupling |
| CN110098616A (en) * | 2019-05-14 | 2019-08-06 | 安徽亚辉电气自动化有限公司 | A kind of Active Power Filter-APF with remained capacity classified calculating |
| CN110098616B (en) * | 2019-05-14 | 2022-11-22 | 安徽亚辉电气自动化有限公司 | Active power filter with load identification and classification calculation |
| CN115642825A (en) * | 2022-11-02 | 2023-01-24 | 江苏科曜能源科技有限公司 | Three-phase five-level PWM inverter and application |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180326 Address after: 213000 East Road, Jiangsu, Changzhou, No. 128 Patentee after: Changzhou ankaite Cable Co. Ltd. Address before: 325000 Wenzhou City, Yueqing Province, Liushi Town, the town of the port of the second industrial zone, seven Patentee before: NEW-SUNRISE ELECTRIC CO., LTD. |
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| TR01 | Transfer of patent right |