CN107959299A - Fixed value reactive power compensator - Google Patents
Fixed value reactive power compensator Download PDFInfo
- Publication number
- CN107959299A CN107959299A CN201711408624.7A CN201711408624A CN107959299A CN 107959299 A CN107959299 A CN 107959299A CN 201711408624 A CN201711408624 A CN 201711408624A CN 107959299 A CN107959299 A CN 107959299A
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- China
- Prior art keywords
- contactor
- reactive power
- fixed value
- power compensator
- switch
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- 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.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The present invention proposes a kind of fixed value reactive power compensator, including：Control unit and capacitor cell, control unit includes air automatic switch, A.C. contactor and relay, device inlet wire and the busbar of substation connect, the A.C. contactor is connected with the automatic switch, the relay is connected with the A.C. contactor, the folding of A.C. contactor described in the air automatic switch control, and control the capacitor cell to be connected with the bus bar side, the A.C. contactor, relay are to control circuit；The capacitor cell is connected with described control unit relay, to compensate substation's reactive power, to improve the power factor of the substation.Beneficial effects of the present invention are：By setting capacitor cell to make up no-load transformer or idle during compared with low-load, to increase the power factor of transformer, so as to reach the effect of economize on electricity, the expenditure of the power adjustment expense of user is further reduced.
Description
Technical field
The present invention relates to technical field of electric power, in particular to a kind of fixed value reactive power compensator.
Background technology
At present, more and more little Wei enterprises flourish, also more and more to electricity needs thereupon.According to electric power
Goal, each its capacity of standard box-type substation used by a user are much larger than user's actual need.Although standard is box
Substation all carries automatic reactive power compensation device, but because it is all disposed within low-voltage bus bar side, electricity sampling can only compensate low
It is idle caused by piezoelectricity device, and in no-load transformer or idle during compared with low-load be it is noncompensable, it is particularly many small
Enterprise is discontinuous electricity consumption at full capacity again, causes transformer idle larger when unloaded or low load rate is higher, so that average
Power factor is relatively low and considerably increases the expenditure of user power adjustment expense.Because idle substantially one of no-load transformer is solid
Fixed numerical value, for this reason, the present invention has invented a kind of solid-state (capacitance is fixed) reactive power compensator, just energy is good, low cost
Solve above-mentioned contradiction.
The content of the invention
In consideration of it, the present invention proposes a kind of fixed value reactive power compensator, it is intended to solves no-load transformer or relatively low negative
The less problem of power factor during load.
On one side, the present invention proposes a kind of fixed value reactive power compensator, including：Control unit and capacitor cell,
Wherein, described control unit includes air automatic switch, A.C. contactor and relay, the air automatic switch and substation
Bus bar side input terminal connection, the A.C. contactor is connected with the air automatic switch, the relay and the friendship
Contactor connection, the folding of A.C. contactor described in the air automatic switch control are flowed, and controls the capacitor cell and institute
Bus bar side connection is stated, the A.C. contactor, relay are to control circuit；The capacitor cell is connected with the relay,
To compensate substation's reactive power, the power factor of the substation is improved.
Further, described device further includes a command unit, described instruction unit be arranged on the air automatic switch,
Between A.C. contactor, described instruction unit is assigning described device instruction.
Further, described device further includes a protective unit, the protective unit be arranged on the air automatic switch,
Between A.C. contactor, to provide overload protection to described device.
Further, described instruction unit unit includes switch member, and the switch member is to described device output services
Instruction.
Further, described instruction unit further includes indicator, and the indicator is indicating the work shape of described device
State.
Further, the switch member includes a button switch, and the button switch is connected with first contactor.
Further, the switch member further includes a change-over switch.
Further, the indicator includes the first signaling lamp, and first signaling lamp is indicating that described device is in
"on" position.
Further, the indicator includes the second signaling lamp, and second signaling lamp is indicating that described device is in
Working status.
Further, the protective unit is earthed system.
Beneficial effects of the present invention are：By setting capacitor cell to make up no-load transformer or idle during compared with low-load,
To increase the power factor of transformer, so as to reach the effect of economize on electricity, the expenditure of the power adjustment expense of user is further reduced.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this area
Technical staff will be clear understanding.Attached drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole attached drawing, identical component is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 is the schematic internal view of fixed value reactive power compensator of the embodiment of the present invention；
Fig. 2 is the front schematic view of fixed value reactive power compensator of the embodiment of the present invention；
Fig. 3 is the basic principle figure of fixed value reactive power compensator of the embodiment of the present invention；
Fig. 4 is the electromagnetic principle figure of fixed value reactive power compensator of the embodiment of the present invention；
Fig. 5 is the first transformer equivalent circuit figure of fixed value reactive power compensator of the embodiment of the present invention；
Fig. 6 is the second transformer equivalent circuit figure of fixed value reactive power compensator of the embodiment of the present invention；
Fig. 7 is the no-load transformer vectogram of fixed value reactive power compensator of the embodiment of the present invention.
Embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although the disclosure is shown in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Completely it is communicated to those skilled in the art.It should be noted that in the case where there is no conflict, embodiment in the present invention and
Feature in embodiment can be mutually combined.Below with reference to the accompanying drawings and the present invention will be described in detail in conjunction with the embodiments.
As shown in fig.4, the electromagnetic principle figure of fixed value reactive power compensator of the embodiment of the present invention.Single-phase transformer is unloaded
During operation voltage u is added in primary side1Winding flows through no-load current i afterwards0, it establishes no-load electromotive force Ni0, this is electronic
The main flux Φ that gesture produces on magnetic circuit, main flux Φ interlink first winding and secondary winding, work as i0With Φ with frequency f1Alternation
When, electromotive force e is respectively induced out in first winding and secondary winding1And e2.Unloaded magnetomotive force acts also on leakage magnetic circuit at the same time
On, stray flux distribution is complicated, and for convenience of analyzing, usually it is equivalent to interlink the leakage magnetic flux Φ of whole windingsσ1, as Fig. 1-1 institute
Show.Its also induced electromotive force in first winding, we term it leakage reactance electromotive force, with eσ1Represent, i0Flow through first winding
There is corresponding resistance drop i0r1, r1It is the resistance of first winding.So as to understand：
u1=-e1-eσ1+i0r1————(1)
During no-load transformer, first winding flows through no-load current i0, its main function is that magnetomotive force is produced in magnetic circuit
Establish magnetic flux.Therefore, it is also called exciting current by we.Refering to shown in Fig. 5 and Fig. 6,For the unloaded electricity of transformer primary side
Pressure,For transformer primary side no-load current, electromotive forceExcitation impedance Zm=rm+jxmWith core loss pFeShould have such as ShiShimonoseki
System：
Draw
Formula：Or
The equivalent circuit of corresponding (2) is as shown in figure 5, corresponding (2-1) equivalent circuit diagram is as shown in Figure 6.This is transformation
Primary side equivalent circuit when device is unloaded.
Vectogram during no-load transformer is as shown in fig. 7, with magnetic fluxFor reference vector, abscissa axis is drawn in
On.CauseWithFall behindThe magnetization component I of no-load currentμWithSame-phase, the cores-loss component of no-load current
Before drawing WithBoth vector sum isDrawNo-load transformer can be drawn according to formula (2-1) afterwards
Vectogram.ActuallyAnd ji0x1Two vector value very littles, in order to which that sees is clearly artificially exaggerated when drawing.Thus,
Its reactive power accounting is far longer than active loss when being not difficult to find out no-load transformer, and power factor exists during general no-load transformer
Between 0.3-0.6.
Reactive power measure under no-load transformer：Instrument method measuring transformer zero load reactive power, is held using transformer
Tester can conveniently measure transformer noload losses, load loss, impedance voltage, each phase active power, general power, each phase nothing
Work(power, total idle, each split-phase power factor, average power factor etc..It is straight using energy on multi-function wrist-instrument of transformer
Connect and read instantaneous reactive value, can also directly read power factor on computer integrated protection, without work value etc..
The selection of reactive power compensator capacitor：Unloaded reactive power value according to measured by different capacity transformers,
Capacitance similar in selection (kvar), general condenser capacity selection are less than the capacity of required compensation, reduce caused by overcompensation
Overvoltage the problems such as.
With reference to shown in Fig. 1 and Fig. 2, its be respectively fixed value reactive power compensator of the embodiment of the present invention schematic internal view and
Front schematic view.Fixed value reactive power compensator includes described in the present embodiment：Control unit and capacitor cell 7, wherein, control is single
Member includes automatic switch 6, A.C. contactor 8 and relay 9, and automatic switch 6 is connected with the input terminal of substation bus bar side, exchange
Contactor 8 is connected with automatic switch 6, and relay 9 is connected with A.C. contactor 8, and automatic switch 6 controls opening for A.C. contactor 8
Close, and control capacitor cell 7 to be connected with bus bar side, A.C. contactor 8, relay 9 are to control circuit；Capacitor cell 7 and control
The relay 9 of unit processed connects, and to compensate substation's reactive power, to increase the proportionality constant of active power in power grid, increases
Add the power factor of substation.Capacitor cell 7 selects corresponding capacity cell according to the reactive power value of substation.Automatically
Switch 6 is air automatic switch.
Specifically, the present apparatus further includes a command unit, command unit be arranged on automatic switch 6, A.C. contactor 8 it
Between, command unit is assigning device instruction.Command unit unit includes switch member, and switch member is to device output services
Instruction.Switch member includes a button switch 1, and button switch 1 is connected with first contactor.Switch member further includes a change-over switch 2.
Command unit unit further includes indicator, indicator to instruction device working status.Indicator includes the first signaling lamp 3,
First signaling lamp 3 is indicating that described device is in "on" position.Indicator includes the second signaling lamp 4, the second signaling lamp 4 to
Instruction device is in running order.
Specifically, the present apparatus further includes a protective unit, protective unit be arranged on automatic switch 6, A.C. contactor 8 it
Between, to provide overcurrent protection to device.Protective unit is earthed system.
Referring particularly to shown in Fig. 3, it is the basic principle figure of fixed value reactive power compensator of the embodiment of the present invention.The present apparatus
Terminals be connected with the busbar of step down side output terminal, by busbar input line access the present apparatus.Specifically, by phase line
It is connected with automatic switch 6, the access of phase line is controlled by automatic switch 6, further controls the folding of phase line；Phase line passes through automatic
It is connected after switch 6 with an A.C. contactor 8, A.C. contactor 8 is connected by relay 9 with capacitor cell 7, is connect by exchange
Tentaculum 8 protects the overcurrent in circuit to make capacitor cell 7 to control the connection of phase line and capacitor cell 7 by relay 9
Into infringement, the circuit being connected with capacitor cell 7 can also be automatically adjusted；Phase line between A.C. contactor 8 and automatic switch 6
On draw a connecting line and be connected with accessing the zero curve of the present apparatus, and a fuse 10 is set on connecting line, protection circuit exempted from
Electrical lesion phase line be located at fuse 10 left side (left side described herein simply schematically illustrate, with facilitate it is clear statement this hair
It is bright, be not especially limited it is used, similarly hereinafter)；A change-over switch 2, change-over switch 2 are set again on the connecting line on the right side of fuse 10
It is normally closed, to the excessively electric situation of control circuit；On the right side of change-over switch 2, one button switch 1 is set, and the two of button switch 1
Side sets one point of A.C. contactor 81, divides A.C. contactor 81 to make circuit still be powered work after the failure of button switch 1；
One contactor coil 11 can also be set on the right side of button switch 1；One dry spring can also be set on the right side of contactor coil 11
Relay 91；Further, the right side of change-over switch 2 is provided with device indicator light, to indicate the working status of the present apparatus；
Device indicator light is respectively arranged with the first signaling lamp 3 and the second signaling lamp 4, and the first signaling lamp 3 is electromotion pilot lamp, and second illustrates
Lamp 4 is work light, both are connected in parallel on button switch 1 on the connecting line on the right side of change-over switch 2 respectively；Electromotion pilot lamp is left
Side is provided with normally closed contactor 83, is lighted when device is powered；Normally open contactor 82 is provided with the right side of work light, works as device
Just it is powered and lights during work.Further, earthing or grounding means 5 is provided with the left of phase line, to protect circuit.
It is understood that no-load transformer is made up or idle during compared with low-load by setting capacitor cell, with increase
The power factor of transformer, so as to reach the effect of economize on electricity, further reduces the expenditure of the power adjustment expense of user.
In the alternatively possible implementation of above-described embodiment, the present apparatus is arranged to body structure, by all first devices
Part modularization, is installed in case, and component is fixed.Babinet is provided with ventilating opening, and babinet selects waterproof material, and makes
For waterproof construction；Further, babinet selects insulating materials to make, and babinet is equipped with ground wire.
In the alternatively possible implementation of above-described embodiment, to survey 315kVA, exemplified by 10/0.4kV transformers,
The unloaded reactive power of actual measurement is 13.4kvar, the three-phase capacitor that selection capacity is 10kvar, rated voltage is 0.4kV and in
Transformer secondary bus side.Operation one month, which brings up to 0.93 from upper monthly 0.61.Save power rate tune
Whole nearly 3,000 yuan of the electricity charge, remarkable benefit.Condenser capacity selects, and is measured according to multiple user 315kVA/10kV transformer parameters
Be subject to mathematical statistics, be derived as capacity 315kVA, 10/0.4kV matched transformer for fixed capacity for 10kVar capacitors as nothing
Work(compensation is the most economical.During the selection of protection element：Air-break, specified breaking capacity is by taking 10kVar capacitors as an example, Ie
=1.25~1.5Ice, selects 30A threephase switches herein；The selection of arrester or overvoltage protection device, chooses PT-40kA/4P,
UC:~380V, IMAX:40kA,IN20kA,UP:≤1.6kV；The selection of contactor, selects selection by taking 10kVar capacitors as an example
The switch-capacitor contactor of B30C, coil voltage 220V
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and scope.In this way, if these modifications and changes of the present invention belongs to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these modification and variations.
Claims (10)
- A kind of 1. fixed value reactive power compensator, it is characterised in that including：Control unit and capacitor cell, wherein,Described control unit includes air automatic switch, A.C. contactor and relay, the air automatic switch and substation Bus bar side input terminal connection, the A.C. contactor is connected with the air automatic switch, the relay and the friendship Contactor connection, the folding of A.C. contactor described in the air automatic switch control are flowed, and controls the capacitor cell and institute Bus bar side connection is stated, the A.C. contactor, relay are to control circuit；The capacitor cell is connected with the relay, to compensate substation's reactive power, improves the substation Power factor.
- 2. fixed value reactive power compensator according to claim 1, it is characterised in that described device further includes an instruction sheet Member, described instruction unit are arranged between the air automatic switch, A.C. contactor, and described instruction unit is to the dress Put and assign instruction.
- 3. fixed value reactive power compensator according to claim 2, it is characterised in that described device further includes a protection list Member, the protective unit are arranged between the air automatic switch, A.C. contactor, are protected to provide overload to described device Shield.
- 4. the fixed value reactive power compensator according to Claims 2 or 3, it is characterised in that described instruction unit unit bag Switch member is included, the switch member is to the instruction of described device output services.
- 5. fixed value reactive power compensator according to claim 4, it is characterised in that described instruction unit further includes instruction Part, the indicator is indicating the working status of described device.
- 6. fixed value reactive power compensator according to claim 5, it is characterised in that the switch member is opened including a button Close, the button switch is connected with first contactor.
- 7. fixed value reactive power compensator according to claim 6, it is characterised in that the switch member further includes a conversion Switch.
- 8. fixed value reactive power compensator according to claim 7, it is characterised in that the indicator includes the first signal Lamp, first signaling lamp is indicating that described device is in "on" position.
- 9. fixed value reactive power compensator according to claim 8, it is characterised in that the indicator includes the second signal Lamp, second signaling lamp is indicating that described device is in running order.
- 10. fixed value reactive power compensator according to claim 9, it is characterised in that the protective unit is ground connection system System.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711408624.7A CN107959299A (en) | 2017-12-22 | 2017-12-22 | Fixed value reactive power compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711408624.7A CN107959299A (en) | 2017-12-22 | 2017-12-22 | Fixed value reactive power compensator |
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| Publication Number | Publication Date |
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| CN107959299A true CN107959299A (en) | 2018-04-24 |
Family
ID=61956772
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711408624.7A Pending CN107959299A (en) | 2017-12-22 | 2017-12-22 | Fixed value reactive power compensator |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2192979Y (en) * | 1993-10-28 | 1995-03-22 | 毕超 | Start operation compensater for electric motor |
| RU2266600C1 (en) * | 2004-07-06 | 2005-12-20 | Томский политехнический университет | Device for automatic tuning of adjustable-gap arc-control reactor correction |
| CN202190081U (en) * | 2011-09-07 | 2012-04-11 | 许青 | Reactive compensation device |
| CN103346575A (en) * | 2013-06-28 | 2013-10-09 | 葛洲坝集团机电建设有限公司 | Adjusting system improving power factors |
| CN203690938U (en) * | 2014-02-19 | 2014-07-02 | 平高集团智能电气有限公司 | Low-voltage reactive-power automatic compensation device |
| CN205319707U (en) * | 2016-01-20 | 2016-06-15 | 长兴东宇电器股份有限公司 | Reactive power compensation cabinet |
-
2017
- 2017-12-22 CN CN201711408624.7A patent/CN107959299A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2192979Y (en) * | 1993-10-28 | 1995-03-22 | 毕超 | Start operation compensater for electric motor |
| RU2266600C1 (en) * | 2004-07-06 | 2005-12-20 | Томский политехнический университет | Device for automatic tuning of adjustable-gap arc-control reactor correction |
| CN202190081U (en) * | 2011-09-07 | 2012-04-11 | 许青 | Reactive compensation device |
| CN103346575A (en) * | 2013-06-28 | 2013-10-09 | 葛洲坝集团机电建设有限公司 | Adjusting system improving power factors |
| CN203690938U (en) * | 2014-02-19 | 2014-07-02 | 平高集团智能电气有限公司 | Low-voltage reactive-power automatic compensation device |
| CN205319707U (en) * | 2016-01-20 | 2016-06-15 | 长兴东宇电器股份有限公司 | Reactive power compensation cabinet |
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Application publication date: 20180424 |
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