CN204068282U - Active filter - Google Patents

Active filter Download PDF

Info

Publication number
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
Authority
CN
China
Prior art keywords
phase
brachium pontis
inverter circuit
center line
output end
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN201420457599.7U
Other languages
Chinese (zh)
Inventor
林道飞
金良赞
林婷婷
林诣凯
杨迪芬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changzhou Ankaite Cable Co ltd
Original Assignee
NEW-SUNRISE ELECTRIC Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEW-SUNRISE ELECTRIC Co Ltd filed Critical NEW-SUNRISE ELECTRIC Co Ltd
Priority to CN201420457599.7U priority Critical patent/CN204068282U/en
Application granted granted Critical
Publication of CN204068282U publication Critical patent/CN204068282U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/20Active power filtering [APF]
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/50Arrangements for eliminating or reducing asymmetry in polyphase networks

Landscapes

  • Inverter Devices (AREA)

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

Active filter
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.
CN201420457599.7U 2013-11-23 2014-08-13 Active filter Expired - Lifetime CN204068282U (en)

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

Publications (1)

Publication Number Publication Date
CN204068282U true CN204068282U (en) 2014-12-31

Family

ID=52209729

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420457599.7U Expired - Lifetime CN204068282U (en) 2013-11-23 2014-08-13 Active filter

Country Status (1)

Country Link
CN (1) CN204068282U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
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

Cited By (5)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
CN101938127B (en) Single-phase and three-phase dual buck full-bridge parallel active power filter
CN204068282U (en) Active filter
CN103001484A (en) Bridgeless power factor corrector of low-additional-voltage zero-voltage switch and modulating method
CN105470963A (en) Active power filter and control method therefor
CN108847775A (en) Novel electric power electric transformer topological structure
CN101950965A (en) Single-phase and three-phase dual-buck type half-bridge parallel active power filter
CN102638047A (en) Three-phase unified power quality control device with bypass switches
CN102570848A (en) Three-phase-single-phase matrix converter
CN102130572B (en) Three-phase rectifier bridge direct-current side parallel connection type active power filter
CN104135164A (en) Interleaved parallel multi-level electronic power transformer
CN106208772A (en) High frequency chain matrix inverter parallel connection improves virtual impedance and the method for power filter
CN204068276U (en) Static reacance generator
CN203645329U (en) Improved LCL filter and inverter system
CN201813163U (en) Full-bridge parallel active power filter in single-phase and three-phase single-power tube bridge arm structures
CN103580040A (en) Self-adaptive compensation device for distribution transformer
CN103414191A (en) Novel grid-connected interface filter and passive damping method therefor
CN206685951U (en) A kind of super capacitor charger suitable for wind power pitch-controlled system
CN104578877A (en) Single-stage boost inverter
CN201758286U (en) Hybrid power filter reactive compensation device
CN204442194U (en) A kind of single-stage boost inverter
CN204809873U (en) Three -phase SVG based on TNPC type
CN209313447U (en) Improved unified Power quality management device circuit topology
CN208401551U (en) A kind of smart grid center energy saving protective device
CN208433915U (en) A kind of high-voltage variable frequency power source
CN201690371U (en) Inverter

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
TR01 Transfer of patent right
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: SRISING ELECTRIC Co.,Ltd.

CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20141231