CN203967753U - A kind of zero-compensation passive filtration unit - Google Patents
A kind of zero-compensation passive filtration unit Download PDFInfo
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- CN203967753U CN203967753U CN201420246622.8U CN201420246622U CN203967753U CN 203967753 U CN203967753 U CN 203967753U CN 201420246622 U CN201420246622 U CN 201420246622U CN 203967753 U CN203967753 U CN 203967753U
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- filtration unit
- passive filtration
- main switch
- electric energy
- adjustment device
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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
The utility model relates to a kind of zero-compensation passive filtration unit, formed by electric energy adjustment device, passive filtration unit two parts, described electric energy adjustment device is made up of auxiliary adjustment reactor, main switch, main contactor, intelligent controller, described passive filtration unit is made up of main switch, silicon controlled rectifying unit, idle compensating control and filter branch, electric energy adjustment device is attempted by passive filtration unit front end, by the current signal of intelligent controller acquisition system and passive filtration unit, drive auxiliary adjustment reactor direct and connect by main switch and electrical network.This device has replaced because system power factor is too high and causes passive filtration unit to drop into, and adopts active filter expensive, that maintenance cost is too high.This novel to electrical network without impact, and have the effect of precharge for capacitor, avoided the impact of switched capacitor, make that operation is more stable, safety, reliable.
Description
Technical field
The utility model belongs to electric power project engineering field, relates to the filtering of electrical energy parameter balance and thyristor, especially a kind of zero-compensation passive filtration unit.
Background technology
The voltage that desirable utility network provides should be the sine wave that has fixed frequency and regulation amplitude.But in fact, in industrial production and daily life, the power electronic equipment that uses widely various rectification functions is all nonlinear load, as direct current machine, UPS, frequency converter, arc furnace, milling train stove, locomotive DC traction system, thyristor regulating photosystem, elevator, fluorescent lamp, computer office equipment, convertible frequency air-conditioner etc.At present due to a large amount of IGBT full-control type electronic devices that use, these nonlinear load operations are central, power factor is high, approach 1, produce a large amount of harmonic currents and harmonic voltage simultaneously, injecting electrical network and can directly have influence on the normal safe operation of electrical network and user's electric equipment, is one of effective measures of administering harmonic pollution in electric power net and install AC filter installation additional.
Traditional passive filter, simple in structure, small investment and maintenance cost are low, so far be still the Main Means of harmonic wave control, but be subject to himself condition to limit (system power factor is too high, passive filtration unit cannot drop into), finally cause system harmonics to can not get timely improvement; And although traditional active filter filter effect is remarkable, its because of complex structure, investment is expensive and maintenance cost is high, adopted by user not yet so far.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art part, a kind of zero-compensation passive filtration unit is provided, this filter can be in the situation that system power factor approaches 1, drop into the capacity of passive filtration unit completely, effectively improve the operational reliability of compensation filter equipment, reduce system loss, greening electrical network, be applicable to the operating mode occasion that any power factor is high, harmonic content is large.
The purpose of this utility model is achieved through the following technical solutions:
A kind of zero-compensation passive filtration unit, by electric energy adjustment device, passive filtration unit two parts composition, it is characterized in that: described electric energy adjustment device is by auxiliary adjustment reactor, main switch, main contactor, intelligent controller forms, described passive filtration unit is by main switch, silicon controlled rectifying unit, idle compensating control and filter branch form, electric energy adjustment device is attempted by passive filtration unit front end, by the current signal of intelligent controller acquisition system and passive filtration unit, drive auxiliary adjustment reactor direct and connect by main switch and electrical network, in order to balance electrical network electric energy, the signal that passive filtration unit sends by idle compensating control acquisition system and electric energy adjustment device, by calculating, triggers silicon controlled rectifying unit, and filter branch is connected to power supply by main switch, one end of silicon controlled rectifying unit is connected with power supply by main switch, and the other end of silicon controlled rectifying unit connects filter branch.
And, described idle compensating control utilizes high-speed digital signal processor DSP as core CPU, completes three-phase voltage, electric current, frequency signal collection in 20ms, utilizes fast FFT to realize the accurate detection computations of parameters, taking the real-time reactive power of load as switching physical quantity, control output; Silicon controlled rectifying unit is received after switching instruction, being less than in 10ms by filter branch, drops into electrical network by main switch.
Advantage of the present utility model and good effect are:
This filter is using passive electrical element as element, replace original in the too high passive power filter that cannot drop into of system power factor, whole switching process is mended without crossing, system switching completes zero current and drops into, switching no-flashy-flow, without impact, and has the effect of precharge to electrical network for capacitor, avoid the impact of switched capacitor, made to move more stable, safety, reliable; For ensureing real-time tracking switching, the whole system response time is less than 30ms, can meet the needs of quick varying duty, realizes compensation fast; If there is anomaly (electronic device misoperation, excess Temperature, device fault etc.) in passive filtration unit switching, intelligent controller (AF-10MR) disconnects electric energy adjustment device automatically, make system keep balance, and by self contact or communication transfer to higher level operating personnel, safeguard, patrol and examine.
Brief description of the drawings
Fig. 1 is system connection diagram of the present utility model;
Fig. 2 is the utility model intelligent controller (AF-10MR) programming figure.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is further described; The present embodiment is descriptive, is not determinate, can not limit thus protection range of the present utility model.
A kind of zero-compensation passive filtration unit, is made up of electric energy adjustment device, passive filtration unit two parts, wherein, electric energy adjustment device, this device is made up of auxiliary adjustment reactor L1, main switch QF, main contactor KM, intelligent controller AF-10MR; Passive filtration unit is made up of main switch QF1, silicon controlled rectifying unit S.C, idle compensating control FTPM and filter branch LC, electric energy adjustment device is attempted by passive filtration unit front end, by the current signal of intelligent controller AF-10MR acquisition system and passive filtration unit, drive auxiliary adjustment reactor L1 direct and connect with electrical network by main switch QF, in order to balance electrical network electric energy; The signal that passive filtration unit sends by idle compensating control FTPM acquisition system and electric energy adjustment device, by calculating, triggers silicon controlled rectifying unit S.C, and filter branch LC is connected to power supply by main switch QF1; One end of silicon controlled rectifying unit S.C is connected with power supply by main switch QF1, and the other end of silicon controlled rectifying unit S.C connects filter branch LC.
Idle compensating control FTPM utilizes high-speed digital signal processor DSP as core CPU, in 20ms, complete three-phase voltage, electric current, frequency signal collection, utilize fast FFT (Fourier basis transformation of variables) to realize the accurate detection computations of parameters, taking the real-time reactive power of load as switching physical quantity, control output; Silicon controlled rectifying unit S.C receives after switching instruction, being less than in 10ms by filter branch LC, drops into electrical network by main switch QF1.Whole fling-cut system completes zero current and drops into, switching no-flashy-flow, to electrical network without impact, and there is the effect of precharge for capacitor, avoided the impact of switched capacitor, make to move more stable, safety, reliable, for ensureing real-time tracking switching, the whole system response time is less than 30ms, can meet the needs of quick varying duty, realizes compensation fast.During this period, if there is anomaly (electronic device misoperation, excess Temperature, device fault etc.) in switching, intelligent controller (AF-10MR) disconnects electric energy adjustment device automatically, make system keep balance, and by self contact or communication transfer to higher level operating personnel, safeguard, patrol and examine.
High-speed computation digital control display FTPM is except having collection signal, and completing converts sends outside command function, also can clearly illustrate that various real-time electric power parameters are as: voltage, electric current, power factor, the electric weight such as meritorious, idle.
Silicon controlled rectifying unit S.C has zero cross fired, and switching no-flashy-flow without impact, and has the effect of precharge to electrical network for capacitor.
Intelligent controller AF-10MR, this intelligent controller is a kind of novel Programmable Logic Controller, it adopts the mode coding of functional block FBD, more simple compared with conventional P LC programming (ladder diagram and instruction), applicable.The use of this controller, makes to regulate reactor L1, automatically drops into according to the demand of reactive power compensation thyristor filter, ensures the balance of System Reactive Power amount.
Filter branch LC, is capacitive character in power frequency, improves power factor, in the time of designed resonance frequency, form series resonance, make this L-C loop in the time of setpoint frequency, form low-down impedance, absorb most harmonic current, thus the percent harmonic distortion of voltage and current in improvement system.According to user's load characteristic, design different combination (single tuning, double tunning, high pass etc.), the harmonic filter of different resonance frequencys (5 times, 7 times, 11 times, 13 inferior) different capabilities.
Claims (1)
1. a zero-compensation passive filtration unit, by electric energy adjustment device, passive filtration unit two parts composition, it is characterized in that: described electric energy adjustment device is by auxiliary adjustment reactor, main switch, main contactor, intelligent controller forms, described passive filtration unit is by main switch, silicon controlled rectifying unit, idle compensating control and filter branch form, electric energy adjustment device is attempted by passive filtration unit front end, by the current signal of intelligent controller acquisition system and passive filtration unit, drive auxiliary adjustment reactor direct and connect by main switch and electrical network, in order to balance electrical network electric energy, filter branch connects power supply by main switch, one end of silicon controlled rectifying unit is connected with power supply by main switch, and the other end of silicon controlled rectifying unit connects filter branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420246622.8U CN203967753U (en) | 2014-05-14 | 2014-05-14 | A kind of zero-compensation passive filtration unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420246622.8U CN203967753U (en) | 2014-05-14 | 2014-05-14 | A kind of zero-compensation passive filtration unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203967753U true CN203967753U (en) | 2014-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420246622.8U Expired - Fee Related CN203967753U (en) | 2014-05-14 | 2014-05-14 | A kind of zero-compensation passive filtration unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104538965A (en) * | 2014-12-30 | 2015-04-22 | 深圳市禾望电气股份有限公司 | Passive harmonic suppression method and system |
-
2014
- 2014-05-14 CN CN201420246622.8U patent/CN203967753U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104538965A (en) * | 2014-12-30 | 2015-04-22 | 深圳市禾望电气股份有限公司 | Passive harmonic suppression method and system |
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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: 20141126 Termination date: 20190514 |
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| CF01 | Termination of patent right due to non-payment of annual fee |