CN203800609U - Low-voltage reactive power factor compensation device - Google Patents
Low-voltage reactive power factor compensation device Download PDFInfo
- Publication number
- CN203800609U CN203800609U CN201420234342.5U CN201420234342U CN203800609U CN 203800609 U CN203800609 U CN 203800609U CN 201420234342 U CN201420234342 U CN 201420234342U CN 203800609 U CN203800609 U CN 203800609U
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- Prior art keywords
- switch
- control unit
- fuse
- reactor
- fling
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- Expired - Fee Related
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- 239000003990 capacitor Substances 0.000 claims abstract description 16
- 238000002955 isolation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
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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
- Y02E40/30—Reactive power compensation
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- Control Of Electrical Variables (AREA)
Abstract
A low-voltage reactive power factor compensation device. The problem that the current compensation equipment generates inrush current and overvoltage in capacitor switching can be solved. Including connecting the isolator of load side in power line, isolator is connected with a plurality of groups capacitance compensation circuit respectively, and capacitance compensation circuit includes compensating capacitor, reactor, on-off switch and fuse, and wherein compensating capacitor is connected with the reactor, and the reactor is connected with on-off switch, on-off switch and fuse, the fuse with isolator connects, on-off switch's control input end is connected with the control unit, and the control unit's power input end is connected with current transformer, the control unit's voltage input end reaches current transformer connects respectively in power line power supply side. The security is high, extension equipment life, and the practicality is strong.
Description
Technical field
The utility model belongs to power technology application, relates to a kind of reactive power automatic compensator of frequency 50Hz voltage 0.4kV urban power distribution network, specifically Low-voltage factor compensation device.
Background technology
Along with industrial needs, reactive power in electric power system load is also increasing, the situation of reactive loss is also very serious, the switching element of existing reactive-load compensation equipment is because employing has contact A.C. contactor, in the process of switching, shove and overvoltage, electrical network is polluted, and A.C. contactor is very easily damaged, and A.C. contactor can not frequent switching, can not be to fast-changing idle compensating, compensation effect is poor, easily occurs overcompensation and under-compensated phenomenon.
Summary of the invention
For addressing the above problem, the utility model proposes a kind of switched capacitor at a high speed of realizing, the life and reliability of equipment is improved, eliminated shoving and overvoltage of switching, and then the compensation arrangement of desirable compensation effect, concrete technical scheme is as follows:
Low-voltage factor compensation device, comprise the isolating switch that is connected to load-side in power circuit, described isolating switch is connected with some groups of capacitor compensating circuits respectively, capacitor compensating circuit comprises compensation condenser, reactor, fling-cut switch and fuse, wherein compensation condenser is connected with reactor, reactor is connected with fling-cut switch, fling-cut switch and fuse, fuse is connected with described isolating switch, the control input end of described fling-cut switch is connected with control unit, the power input of control unit is connected with current transformer, the voltage input end of control unit and described current transformer are connected to power circuit mains side.
Described fling-cut switch comprises a single-phase thyristor and a diode, and wherein single-phase thyristor and diode reverse are connected in parallel.
Described control unit comprises thyristor triggering impulse drive circuit, isolation trigger impulse transformer, processor and variable connector.
The beneficial effects of the utility model: adopt the quick noncontacting switch being formed by single-phase thyristor and diode and detect control circuit, the power factor of detection of grid, and according to power factor, quick-switching compensation condenser, carry out reactive power compensation, realize the switching of capacitor at the zero crossing of electric current, do not have switching to shove, owing to adopting contactless electronic switch, can realize switched capacitor at a high speed, the life and reliability of equipment is improved, has eliminated shoving and overvoltage of switching, reached desirable compensation effect.The useful life of extension device and reliability, guarantee safety in production, practical.
Accompanying drawing explanation
Fig. 1 is structure connection layout of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model;
Fig. 3 is the fundamental diagram of control unit in the utility model.
Embodiment
For the ease of understanding, below in conjunction with Fig. 1-3, the utility model is described in further detail:
Embodiment 1: Low-voltage factor compensation device, comprise the isolating switch that is connected to load-side in power circuit, described isolating switch is connected with some groups of capacitor compensating circuits respectively, capacitor compensating circuit comprises compensation condenser, reactor, fling-cut switch and fuse, wherein compensation condenser is connected with reactor, reactor is connected with fling-cut switch, fling-cut switch and fuse, fuse is connected with described isolating switch, the control input end of described fling-cut switch is connected with control unit, the power input of control unit is connected with current transformer, the voltage input end of control unit and described current transformer are connected to power circuit mains side.
Wherein, the effect of fuse is protection thyristor and diode, and the effect of reactor is protection diode, the impact of opposing when equipment power transmission, and the harmonic wave in the electrical network of filtering simultaneously, and according to reactance Rate, the harmonic wave that filtering is different.
Embodiment 2: described fling-cut switch comprises a single-phase thyristor and a diode, wherein single-phase thyristor and diode reverse are connected in parallel, the positive pole that is single-phase thyristor is connected with diode cathode, and the positive pole of diode and the negative pole of single-phase thyristor are connected.When single-phase thyristor does not have triggering signal, its state in turn-offing, power supply charges through diode pair compensation condenser, through a cycle 20ms, compensation condenser voltage is flushed to the peak value of positive half cycles, because diode D1 has the unidirectional general character, after being full of, capacitor can not discharge, compensation condenser is the state in disconnecting quite, when single-phase thyristor trigger electrode has triggering signal, single-phase thyristor is in conducting state, and compensation condenser discharges, and compensation condenser is the state in dropping into quite.As long as control the turn-on and turn-off of single-phase thyristor, input and excision that just can control and compensation capacitor.
Single-phase thyristor triggers determining of the moment: when single-phase thyristor is when disconnecting, compensation condenser voltage is flushed to the peak value moment of positive half cycles, the peak value of the positive half cycle of power supply cycle, be 90 degree of the positive half cycle of power supply cycle zero crossing, in the terminal voltage of this point compensation condenser and the voltage of electrical network, equate, if give single-phase thyristor triggering signal in this point, single-phase thyristor will be in opening state, because the terminal voltage of compensation condenser and the voltage of electrical network equate, the electric current of single-phase thyristor is also zero, when power supply cycle is greater than 90 while spending, the electric current of single-phase thyristor starts to increase by zero, when power supply cycle 270 is spent, be zero, in the time of spending to next cycle 90 at 270 degree, diode starts conducting, compensation condenser is in input state, knownly as long as be engraved in 90 degree of the positive half cycle of power supply cycle zero crossing while controlling the triggering of single-phase thyristor, just can realize the current zero-crossing point input of compensation condenser, realize the quick-switching of the no-flashy-flow of compensation condenser.
Embodiment 3: further, described control unit comprises thyristor triggering impulse drive circuit, isolation trigger impulse transformer, processor and variable connector.
Beneficial effect: can realize switched capacitor at a high speed, the life and reliability of equipment is improved, eliminated shoving and overvoltage of switching, and then the compensation arrangement of desirable compensation effect, effectively solved existing compensation equipment, at capacitor switching, produce and shove and superpotential problem, the useful life of extension device and reliability, guarantee safety in production.
Claims (3)
1. Low-voltage factor compensation device, comprise the isolating switch that is connected to load-side in power circuit, it is characterized in that: described isolating switch is connected with some groups of capacitor compensating circuits respectively, capacitor compensating circuit comprises compensation condenser, reactor, fling-cut switch and fuse, wherein compensation condenser is connected with reactor, reactor is connected with fling-cut switch, fling-cut switch and fuse, fuse is connected with described isolating switch, the control input end of described fling-cut switch is connected with control unit, the power input of control unit is connected with current transformer, the voltage input end of control unit and described current transformer are connected to power circuit mains side.
2. Low-voltage factor compensation device as claimed in claim 1, is characterized in that: described fling-cut switch comprises a single-phase thyristor and a diode, and wherein single-phase thyristor and diode reverse are connected in parallel.
3. Low-voltage factor compensation device as claimed in claim 1, is characterized in that: described control unit comprises thyristor triggering impulse drive circuit, isolation trigger impulse transformer, processor and variable connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420234342.5U CN203800609U (en) | 2014-05-08 | 2014-05-08 | Low-voltage reactive power factor compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420234342.5U CN203800609U (en) | 2014-05-08 | 2014-05-08 | Low-voltage reactive power factor compensation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203800609U true CN203800609U (en) | 2014-08-27 |
Family
ID=51382798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420234342.5U Expired - Fee Related CN203800609U (en) | 2014-05-08 | 2014-05-08 | Low-voltage reactive power factor compensation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203800609U (en) |
-
2014
- 2014-05-08 CN CN201420234342.5U patent/CN203800609U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140827 Termination date: 20210508 |