CN201303251Y - Parallel hybrid active filter with reactive power compensation based on phase controlled switch technique - Google Patents
Parallel hybrid active filter with reactive power compensation based on phase controlled switch technique Download PDFInfo
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- CN201303251Y CN201303251Y CNU2008202181410U CN200820218141U CN201303251Y CN 201303251 Y CN201303251 Y CN 201303251Y CN U2008202181410 U CNU2008202181410 U CN U2008202181410U CN 200820218141 U CN200820218141 U CN 200820218141U CN 201303251 Y CN201303251 Y CN 201303251Y
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- active filter
- controlled switch
- phase controlled
- current
- parallel hybrid
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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
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
A parallel hybrid active filter with reactive power compensation based on phase controlled switch technique belongs to the electric engineering and mechanical technology technical field, which is modified from parallel hybrid active filter with reactive power compensation. The parallel hybrid active filter comprises a phase controlled switch, a phase controlled switch controller, a sensor, a capacitor, a reactive filter and an active filter, wherein one end of the phase controlled switch is connected with the capacitor and the other end is accessed into power network; the power network is connected with the reactive filter and the active filter in parallel; the input of the phase controlled switch controller is connected with the voltage and current signals, the environment temperature signals and the control voltage monitor signals of the system power network, and the output is connected with the compensation current control circuit of the phase controlled switch and the active filter. The parallel hybrid active filter can switch the phase controlled switch and provide compensation current of the active filter at optimal phase, thereby eliminating the effect of over voltage or over current in the switching process of the switch, and realizing accurate control on operating time, to provide a parallel hybrid active filter of high voltage and large current.
Description
Technical field
The utility model belongs to electrical engineering and field of mechanical technique, relates to a kind of parallel connection mixed type active filter based on phased switch technology band no-power compensation function.
Background technology
Its reactive power compensator of parallel connection mixed type active filter of tradition band no-power compensation function is a switching of realizing the capacitor group by control A.C. contactor or air switch.The shortcoming of this device is can produce in the opening-closing capacitor bank process to shove and overvoltage, this shoving can influence the work of other power electronic equipments in active filter and the system with overvoltage, also can cause the damage of active filter and other power electronic equipments when serious, in the high voltage field, it is more outstanding with superpotential harm to shove.In addition, the parallel connection mixed type active filter of tradition band no-power compensation function is difficult to realize the optimization operation of reactive power compensation, and benefit often took place owing to the reason of equipment or the limitation of user's level, to electrical network foldback reactive power, cause the quality of voltage problem when especially voltage is higher after zero point.
Summary of the invention
The technical problems to be solved in the utility model is to propose a kind of parallel connection mixed type active filter based on phased switch technology band no-power compensation function, upgrading on the basis of the parallel connection mixed type active filter that has the band no-power compensation function now, the nothing of employing phased switch technology realization reactive power compensator is impacted and is thrown, cuts, and eliminates and shoves and the influence of overvoltage to reactive power compensator and active filter.
The technical solution of the utility model is as follows:
Should comprise phased switch, phased switch controller, transducer, capacitor, passive filter and active filter based on the parallel connection mixed type active filter of phased switch technology band no-power compensation function.Phased switch one end links to each other with capacitor, and the other end is connected into electrical network.Also be parallel with passive filter and active filter on the electrical network simultaneously.Voltage and current signal, ambient temperature signal and the control voltage monitoring signal of phased switch controller input welding system electrical network, output connects the offset current control circuit of phased switch and active filter respectively.
Effect of the present utility model and benefit are to introduce advanced phased switch technology, on optimum phase, finish the input of the switching and the active filter offset current of phased switch, the harmonic pollution that shoves and cause that elimination produces in the switch on-off process, and cause the problem of the work of over-voltage protection active filter.
Description of drawings
Accompanying drawing is a principle schematic of the present utility model.
Among the figure, e
sExpression AC power electromotive force, is is the AC power electric current, i
LBe load current.i
cBe offset current, i
c *Be the command signal of offset current, APF is an Active Power Filter-APF.
Embodiment
Be described in detail specific embodiment of the utility model below in conjunction with technical scheme and accompanying drawing.
Principle schematic with reference to the accompanying drawings, the parallel connection mixed type active filter of band no-power compensation function is made up of capacitor, passive filter and active filter.Capacitor is used for the required reactive power of bucking-out system.Passive filter is responsible for the high-frequency harmonic current segment of bucking-out system.The low-frequency harmonics current segment is compensated by active filter APF.The voltage and current of the real-time detection of grid of active filter APF, calculate the command signal of offset current through the instruction current computing, this signal amplifies through offset current generation circuit, draw offset current, the harmonic current that will compensate in offset current and the load current is offset, and finally obtains the source current of expecting.For example, when the harmonic current that needs compensating load to produce, Active Power Filter-APF detects target compensation load current i
LHarmonic component i
Lh, with its command signal i of electric current by way of compensation
c *, by the offset current i of offset current generation circuit generation
cPromptly with load current in harmonic component i
LhEqual and opposite in direction that is to say, AC power current i s power supply only provides fundamental current to load, and harmonic current is provided by the offset current generation circuit of Active Power Filter-APF.Thereby make only to contain first-harmonic among the AC power current i s, do not contain harmonic wave.So just reached the purpose that suppresses harmonic wave in the source current.
The phased switch controller is monitored the current and voltage signals of electrical network in real time, ambient temperature signal and control voltage monitoring signal, draw the optimum target phase place through after the calculating of controller, export the offset current control circuit that control signal connects phased switch and active filter respectively then, make phased switch carry out capacitor switching in the optimum target phase place, finish idle dynamic compensation, the elimination system shoves and overvoltage; Make active filter at optimum target phase place switching, avoid system shove and over-voltage protection active filter and system in the operate as normal of other power electronic equipments.
Claims (1)
1. parallel connection mixed type active filter based on phased switch technology band no-power compensation function, comprise phased switch, phased switch controller, transducer, capacitor, passive filter and active filter, it is characterized in that phased switch one end links to each other with capacitor, the other end is connected into electrical network, also be parallel with passive filter and active filter on the electrical network, voltage and current signal, ambient temperature signal and the control voltage monitoring signal of phased switch controller input welding system electrical network, output connects the offset current control circuit of phased switch and active filter respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202181410U CN201303251Y (en) | 2008-09-20 | 2008-09-20 | Parallel hybrid active filter with reactive power compensation based on phase controlled switch technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202181410U CN201303251Y (en) | 2008-09-20 | 2008-09-20 | Parallel hybrid active filter with reactive power compensation based on phase controlled switch technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201303251Y true CN201303251Y (en) | 2009-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202181410U Expired - Fee Related CN201303251Y (en) | 2008-09-20 | 2008-09-20 | Parallel hybrid active filter with reactive power compensation based on phase controlled switch technique |
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| CN (1) | CN201303251Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107540A (en) * | 2011-11-10 | 2013-05-15 | 扬州扬开凯越科技有限公司 | Intelligent adjusting device for quality of electric energy |
| CN103378595A (en) * | 2012-04-12 | 2013-10-30 | 长沙理工大学 | Hybrid active filter parameter optimization configuration considering resonance |
| CN103457265A (en) * | 2013-09-03 | 2013-12-18 | 上海大学 | Passive damping circuit of LCL filter |
| CN103558792A (en) * | 2013-11-08 | 2014-02-05 | 宁夏天地经纬电力设备工程有限公司 | Synchro switch controller |
| CN103576590A (en) * | 2013-11-08 | 2014-02-12 | 宁夏天地经纬电力设备工程有限公司 | Phase selection on-off controller |
| CN106374484A (en) * | 2015-07-24 | 2017-02-01 | 利思电气（上海）有限公司 | Control system for outdoor active power filter device |
-
2008
- 2008-09-20 CN CNU2008202181410U patent/CN201303251Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107540A (en) * | 2011-11-10 | 2013-05-15 | 扬州扬开凯越科技有限公司 | Intelligent adjusting device for quality of electric energy |
| CN103378595A (en) * | 2012-04-12 | 2013-10-30 | 长沙理工大学 | Hybrid active filter parameter optimization configuration considering resonance |
| CN103378595B (en) * | 2012-04-12 | 2016-06-08 | 长沙理工大学 | Consider the hybrid active filter parameter optimization configuration of resonance |
| CN103457265A (en) * | 2013-09-03 | 2013-12-18 | 上海大学 | Passive damping circuit of LCL filter |
| CN103558792A (en) * | 2013-11-08 | 2014-02-05 | 宁夏天地经纬电力设备工程有限公司 | Synchro switch controller |
| CN103576590A (en) * | 2013-11-08 | 2014-02-12 | 宁夏天地经纬电力设备工程有限公司 | Phase selection on-off controller |
| CN106374484A (en) * | 2015-07-24 | 2017-02-01 | 利思电气（上海）有限公司 | Control system for outdoor active power filter device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090902 Termination date: 20100920 |