CN107482640A - Reactive power compensation circuit and reactive power compensator - Google Patents
Reactive power compensation circuit and reactive power compensator Download PDFInfo
- Publication number
- CN107482640A CN107482640A CN201610405240.9A CN201610405240A CN107482640A CN 107482640 A CN107482640 A CN 107482640A CN 201610405240 A CN201610405240 A CN 201610405240A CN 107482640 A CN107482640 A CN 107482640A
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- China
- Prior art keywords
- reactive power
- capacitor
- relay
- magnetic latching
- compensation circuit
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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
-
- 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 provides a kind of reactive power compensation circuit and reactive power compensator, and to solve, its overcurrent ability to bear is poor, security and stability is poor when the reactive power compensation circuit of prior art uses thyristor, the technical problem of easy punch through damage.The reactive power compensation circuit includes：Capacitor；For the fling-cut switch of switched capacitor, fling-cut switch is connected with capacitor, and fling-cut switch includes electromagnetic relay in parallel, magnetic latching relay, and electromagnetic relay is normally open, and magnetic latching relay is normally off；Controller, it is connected respectively with electromagnetic relay, magnetic latching relay；When controller exports forward drive current, electromagnetic relay closes prior to magnetic latching relay, capacitor access circuit；When controller stops output forward drive current, electromagnetic relay is disconnected, and magnetic latching relay is kept closed, and capacitor keeps access circuit state；When controller exports reverse drive electric current, magnetic latching relay disconnects, and capacitor disconnects with circuit.
Description
Technical field
The present invention relates to field of energy-saving technology, more particularly, to a kind of reactive power compensation circuit and idle
Compensation device.
Background technology
At present, reactive power compensation device is the common technology of rural power grids field and other field, is led to
The function that fling-cut switch realizes reactive power compensation is crossed, in reactive power compensation flow, electric capacity
The moment of device switching easily produces and shoved, and must have one as the switch for carrying these high currents
Fixed current capacity.In low-pressure reactive compensation field, using it is wide be that controllable silicon is protected with magnetic
Hold the combination switch pattern of relay, combination switch selects thyristor switch, thyristor switch with
Magnetic maintained switch parallel running, it has silicon control zero-cross switching in the moment switched on and off
Advantage, and there is the advantages of magnetic maintained switch zero-power during normal ON.Combination switch
With being opened without the remarkable advantages such as impact, low-power consumption, high life, alternative contactor or IGCT
Close.
However, the thyristor used in combination switch is very sensitive to voltage change ratio,
It is limited to the ability to bear of overcurrent, breakdown hidden danger be present, security and stability is poor, especially exists
In the case that harmonic wave is slightly larger, thyristor easily damages.
The content of the invention
It is an object of the invention to provide a kind of reactive power compensation circuit, to solve to deposit in the prior art
Reactive power compensation circuit use thyristor when its overcurrent ability to bear is poor, safety and stability
The technical problem of poor, the easy punch through damage of property.
To reach above-mentioned purpose, the embodiment of the present invention uses following technical scheme：
A kind of reactive power compensation circuit, including：
Capacitor；
For the fling-cut switch of capacitor described in switching, the fling-cut switch and the capacitor string
Connection, the fling-cut switch include electromagnetic relay in parallel, magnetic latching relay, the electromagnetism
Relay is normally open, and the magnetic latching relay is normally off；
Controller, it is connected respectively with the electromagnetic relay, magnetic latching relay；
When the controller exports forward drive current, the electromagnetic relay is prior to the magnetic
Guard relay closes, and the capacitor accesses circuit；When the controller stops output forward direction
During driving current, the electromagnetic relay is disconnected, and the magnetic latching relay is kept closed,
The capacitor keeps access circuit state；
When the controller exports reverse drive electric current, the electromagnetic relay first closes, institute
Disconnected after stating magnetic latching relay, the capacitor still keeps access circuit state；When described
When controller stops output reverse drive electric current, the electromagnetic relay disconnects, the capacitor
Disconnected with circuit.
As the further improvement of above-mentioned technical proposal, the contact of the electromagnetic relay is resistance to burning
Lose alloy contact.
As the further improvement of above-mentioned technical proposal, the contact of the magnetic latching relay is low
On-state rate contact.
Reactive power compensation circuit provided by the invention, including capacitor, for capacitor described in switching
Fling-cut switch and controller, fling-cut switch connects with capacitor, and fling-cut switch includes in parallel
Electromagnetic relay, magnetic latching relay, in use, the contact of electromagnetic relay is normally open,
The contact of magnetic latching relay is normally off, and controller keeps relay with electromagnetic relay, magnetic
Device connects respectively, also, the reactive power compensation circuit is in parallel with main circuit.
If user is needed in capacitor access main circuit, main circuit is connected, starts controller,
Controller is set to export forward drive current to electromagnetic relay and magnetic latching relay, now, electricity
The coil of magnetic relay and magnetic latching relay is electriferous state, due to magnetic latching relay
Actuation time is longer than the actuation time of electromagnetic relay, and therefore, electromagnetic relay is kept prior to magnetic
Relay closes, then capacitor access circuit in parallel, and magnetic latching relay is after electromagnetic relay
Closure；Then, after electromagnetic relay and magnetic latching relay are closure state, control is made
Device stops output forward drive current, the forward drive in electromagnetic relay and magnetic latching relay
Current vanishes, now, electromagnetic relay disconnect, because the contact of magnetic latching relay is by forever
Long magnet attraction and close, therefore, magnetic latching relay will not disappearing because of forward drive current
Losing and disconnect, it is still kept closed, then capacitor still keeps access circuit state,
Said process makes capacitor keep persistently conducting with main circuit.
If user needs capacitor to exit main circuit, make controller to electromagnetic relay and magnetic
Guard relay exports reverse drive electric current, and electromagnetic relay and magnetic latching relay are reversely driving
In the presence of streaming current, electromagnetic relay first closes, and is disconnected after magnetic latching relay, capacitor
Still keep access circuit state；Then, when electromagnetic relay is in closure state and magnetic is kept
When relay is off, controller is set to stop output reverse drive electric current, electromagnetism relay
Device disconnects, and now, electromagnetic relay and magnetic latching relay disconnect, capacitor and main circuit
Disconnect, complete a switching operation.
In the prior art, in low-pressure reactive compensation field, using it is wide be controllable silicon and magnetic
The combination switch pattern of guard relay, combination switch select thyristor switch, thyristor switch
With magnetic maintained switch parallel running, the thyristor used in combination switch is to voltage change
Rate is very sensitive, limited to the ability to bear of overcurrent, breakdown hidden danger, security and stability be present
Difference, especially in the case where harmonic wave is slightly larger, thyristor easily damages.Compared to existing
Technology, reactive power compensation circuit provided by the invention, by electromagnetic relay and magnetic latching relay with
Form in parallel combines, the ingenious adhesive that alnico magnets are relied on using magnetic latching relay
And the characteristics of closing, improve its excessively stream bearing capacity and security and stability, also, its cost compared with
It is low.
Another object of the present invention is to provide a kind of reactive power compensator, including it is as described above
Reactive power compensation circuit；Also include power input, for accessing electric power main circuit, the power supply
Input is connected with the reactive power compensation circuit.
As the further improvement of above-mentioned technical proposal, in addition to signal input part, for accessing
Signal main circuit, the signal input part are connected with the reactive power compensation circuit.
As the further improvement of above-mentioned technical proposal, the reactive power compensation circuit is more to be multiple
The individual reactive power compensation circuit is in parallel.
As the further improvement of above-mentioned technical proposal, the capacitor is multiple.
Further, the fling-cut switch is identical with the quantity of the capacitor, the capacitor
Connected one to one with the fling-cut switch.
As the further improvement of above-mentioned technical proposal, the capacitor is 6,12,
18,24,30 or 36, the capacitor by setting rule be connected in parallel on two-phase it
Between or phase and ground between.
As the further improvement of above-mentioned technical proposal, the reactive power compensator also includes communication
Interface, for realizing more cascades of the reactive power compensator.
As the further improvement of above-mentioned technical proposal, the communication interface communicates for RS485
Interface.
Reactive power compensator provided by the invention, including reactive power compensation circuit as described above, i.e.,
Above-mentioned reactive power compensation circuit is fitted into the device, makes the device that there is the reactive power compensation circuit
Advantage, therefore, reactive power compensator provided by the invention compared to prior art beneficial effect,
The beneficial effect of above-mentioned reactive power compensation circuit is same as, here is omitted.
Brief description of the drawings
In order to illustrate more clearly of the specific embodiment of the invention or technical side of the prior art
Case, letter will be made to the required accompanying drawing used in embodiment or description of the prior art below
Singly introduce, it should be apparent that, drawings in the following description are some embodiments of the present invention,
For those of ordinary skill in the art, on the premise of not paying creative work, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is reactive power compensation circuit figure provided in an embodiment of the present invention.
Reference：
C- capacitors；
K1- electromagnetic relays；
K2- magnetic latching relays；
CK- controllers.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, shown
So, described embodiment is part of the embodiment of the present invention, rather than whole embodiments.
Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work
Under the premise of the every other embodiment that is obtained, belong to the scope of protection of the invention.
In the description of the invention, it is necessary to illustrate, term " " center ", " on ", " under ",
The orientation of the instruction such as "left", "right", " vertical ", " level ", " interior ", " outer " or position are closed
It is based on orientation shown in the drawings or position relationship, to be for only for ease of the description present invention and letter
Change description, rather than instruction or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition,
Term " first ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction
Or imply relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited,
Term " installation ", " connected ", " connection " should be interpreted broadly, for example, it may be fixed connect
Connect or be detachably connected, or be integrally connected；Can mechanically connect, can also
It is electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, can specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
Fig. 1 is reactive power compensation circuit figure provided in an embodiment of the present invention.
Shown in reference picture 1, the reactive power compensation circuit of the present embodiment offer, including：
Capacitor C；
For the fling-cut switch of capacitor C described in switching, the fling-cut switch and the capacitor
C connects, and the fling-cut switch includes electromagnetic relay K1, magnetic latching relay K2 in parallel,
The electromagnetic relay K1 is normally open, and the magnetic latching relay K2 is normally off；
Controller CK, it is connected respectively with the electromagnetic relay K1, magnetic latching relay K2；
When the controller CK export forward drive current when, the electromagnetic relay K1 prior to
The magnetic latching relay K2 closures, the capacitor C access circuit；When the controller
When CK stops output forward drive current, the electromagnetic relay K1 is disconnected, and the magnetic is kept
Relay K2 is kept closed, and the capacitor C keeps access circuit state；
When the controller CK exports reverse drive electric current, the magnetic latching relay K2
Disconnect, the capacitor C disconnects with circuit.
Reactive power compensation circuit provided by the invention, including capacitor, for capacitor described in switching
Fling-cut switch and controller, fling-cut switch connects with capacitor, and fling-cut switch includes in parallel
Electromagnetic relay, magnetic latching relay, in use, the contact of electromagnetic relay is normally open,
The contact of magnetic latching relay is normally off, and controller keeps relay with electromagnetic relay, magnetic
Device connects respectively, also, the reactive power compensation circuit is in parallel with main circuit.
If user is needed in capacitor access main circuit, main circuit is connected, starts controller,
Controller is set to export forward drive current to electromagnetic relay and magnetic latching relay, now, electricity
The coil of magnetic relay and magnetic latching relay is electriferous state, due to magnetic latching relay
Actuation time is longer than the actuation time of electromagnetic relay, and therefore, electromagnetic relay is kept prior to magnetic
Relay closes, then capacitor access circuit in parallel, and magnetic latching relay is after electromagnetic relay
Closure；Then, after electromagnetic relay and magnetic latching relay are closure state, control is made
Device stops output forward drive current, the forward drive in electromagnetic relay and magnetic latching relay
Current vanishes, now, electromagnetic relay disconnect, because the contact of magnetic latching relay is by forever
Long magnet attraction and close, therefore, magnetic latching relay will not disappearing because of forward drive current
Losing and disconnect, it is still kept closed, then capacitor still keeps access circuit state,
Said process makes capacitor keep persistently conducting with main circuit.
If user needs capacitor to exit main circuit, make controller to electromagnetic relay and magnetic
Guard relay exports reverse drive electric current, and electromagnetic relay and magnetic latching relay are reversely driving
In the presence of streaming current, electromagnetic relay first closes, and is disconnected after magnetic latching relay, capacitor
Still keep access circuit state；Then, when electromagnetic relay is in closure state and magnetic is kept
When relay is off, controller is set to stop output reverse drive electric current, electromagnetism relay
Device disconnects, and now, electromagnetic relay and magnetic latching relay disconnect, capacitor and main circuit
Disconnect, complete a switching operation.
In the prior art, in low-pressure reactive compensation field, using it is wide be controllable silicon and magnetic
The combination switch pattern of guard relay, combination switch select thyristor switch, thyristor switch
With magnetic maintained switch parallel running, the thyristor used in combination switch is to voltage change
Rate is very sensitive, limited to the ability to bear of overcurrent, breakdown hidden danger, security and stability be present
Difference, especially in the case where harmonic wave is slightly larger, thyristor easily damages.Compared to existing
Technology, reactive power compensation circuit provided by the invention, by electromagnetic relay and magnetic latching relay with
Form in parallel combines, the ingenious adhesive that alnico magnets are relied on using magnetic latching relay
And the characteristics of closing, improve its excessively stream bearing capacity and security and stability, also, its cost compared with
It is low.
It should be noted that magnetic latching relay is a kind of new relay that in the market occurs in recent years
Device, and a kind of automatic switch, with other electromagnetic relays and function phase is same, magnetic keep after
Electrical equipment plays a part of turn on automatically and cut-out to circuit.Except that magnetic latching relay
Normally closed or normally open be entirely to rely on the effect of permanent-magnet steel, the conversion of its on off state is
Complete by the pulse electrical signal triggering of one fixed width, for more common relay, have
The advantages such as power saving, stable performance height, small volume, large carrying capacity.
Electromagnetic relay is a kind of electronic control device, and there is control system (also known as to input back for it
Road) and by control system (also known as output loop), be commonly used in automatic control circuit,
It is really to be gone to control larger current, higher voltage with less electric current, relatively low voltage
A kind of automatic switch.Therefore play automatically adjust in circuit, safeguard protection, change-over circuit etc. are made
With.As long as adding certain voltage at coil both ends, certain electric current is will pass through in coil,
So as to produce galvanomagnetic-effect, armature overcomes the pulling force of return spring in the presence of electromagnetic attracting force
Iron core is drawn to, so as to the movable contact with moving armature and stationary contact adhesive.After coil blackout, electricity
The suction of magnetic also disappears therewith, and armature will return to original position in the reaction force of spring,
Movable contact is set to be discharged with original stationary contact.So adhesive, release, so as to reach in circuit
Conducting, cut-out purpose.
Based on above-mentioned reactive power compensation circuit, it is preferable that the contact of the electromagnetic relay is elected as resistance to
Ablation alloy contact, the alloy contact of resistance to ablation, which has, hides electric arc caused by relay combined floodgate
Effect, and its small volume, power are big, reliability is high and noble metal dosage is few, can reduce use
Cost.
Further, the contact of the magnetic latching relay is preferably low on-state rate contact, is reduced
Its temperature.
Another object of the present invention is to provide a kind of reactive power compensator, including it is as described above
Reactive power compensation circuit；Also include power input, for accessing electric power main circuit, the power supply
Input is connected with the reactive power compensation circuit, to connect main circuit.Further, it is described
Reactive power compensator also includes signal input part, and for accessing signal main circuit, the signal is defeated
Enter end to be connected with the reactive power compensation circuit.Preferably, the reactive power compensator also includes logical
Communication interface, for realizing more cascades of the reactive power compensator, the communication interface can be excellent
Elect RS485 communication interfaces as.
Based on above-mentioned reactive power compensator, it is multiple, Duo Gesuo to set the reactive power compensation circuit
State reactive power compensation circuit parallel connection.Specifically, the capacitor is multiple, the fling-cut switch with
The quantity of the capacitor is identical, and the capacitor connects one to one with the fling-cut switch.
Preferably, the capacitor is 6,12,18,24,30 or 36
Individual, the capacitor is by setting rule parallel connection between the two phases or between phase and ground.
Filled compared to 36 grades of integral type reactive-load compensation for not having versatility in the prior art
Put, the reactive power compensator that the present embodiment provides has 5 kinds of optional specifications, meets a variety of uses
The requirement of person, make the imaginary power automatic compensation unit that there is versatility, expand reactive-load compensation list
The scope of application of member, reduce energy consumption.
Reactive power compensator provided by the invention, including reactive power compensation circuit as described above, i.e.,
Above-mentioned reactive power compensation circuit is fitted into the device, makes the device that there is the reactive power compensation circuit
Advantage, therefore, reactive power compensator provided by the invention compared to prior art beneficial effect,
The beneficial effect of above-mentioned reactive power compensation circuit is same as, here is omitted.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention,
Rather than its limitations；Although the present invention is described in detail with reference to foregoing embodiments,
It will be understood by those within the art that：It still can be to described in foregoing embodiments
Technical scheme modify, either which part or all technical characteristic are equally replaced
Change；And these modifications or replacement, do not make the essence disengaging present invention of appropriate technical solution each
The scope of embodiment technical scheme.
Claims (10)
- A kind of 1. reactive power compensation circuit, it is characterised in that including：Capacitor；For the fling-cut switch of capacitor described in switching, the fling-cut switch and the capacitor string Connection, the fling-cut switch include electromagnetic relay in parallel, magnetic latching relay, the electromagnetism Relay is normally open, and the magnetic latching relay is normally off；Controller, it is connected respectively with the electromagnetic relay, magnetic latching relay；When the controller exports forward drive current, the electromagnetic relay is prior to the magnetic Guard relay closes, and the capacitor accesses circuit；When the controller stops output forward direction During driving current, the electromagnetic relay is disconnected, and the magnetic latching relay is kept closed, The capacitor keeps access circuit state；When the controller exports reverse drive electric current, the electromagnetic relay first closes, institute Disconnected after stating magnetic latching relay, the capacitor still keeps access circuit state；When described When controller stops output reverse drive electric current, the electromagnetic relay disconnects, the capacitor Disconnected with circuit.
- 2. reactive power compensation circuit according to claim 1, it is characterised in that the electricity The contact of magnetic relay is the alloy contact of resistance to ablation.
- 3. reactive power compensation circuit according to claim 2, it is characterised in that the magnetic The contact of guard relay is low on-state rate contact.
- 4. a kind of reactive power compensator, it is characterised in that any including such as claim 1-3 Reactive power compensation circuit described in；Also include power input, for accessing electric power main circuit, the power input and institute State reactive power compensation circuit connection.
- 5. reactive power compensator according to claim 4, it is characterised in that also include Signal input part, for accessing signal main circuit, the signal input part and the reactive-load compensation Circuit connects.
- 6. reactive power compensator according to claim 5, it is characterised in that the nothing Work(compensation circuit is multiple, and multiple reactive power compensation circuits are in parallel.
- 7. reactive power compensator according to claim 6, it is characterised in that the electricity Container is multiple；The fling-cut switch is identical with the quantity of the capacitor, the capacitor and the switching Switch connects one to one.
- 8. reactive power compensator according to claim 7, it is characterised in that the electricity Container is 6,12,18,24,30 or 36, and the capacitor is by setting Set pattern rule parallel connection is between the two phases or between phase and ground.
- 9. reactive power compensator according to claim 8, it is characterised in that also include Communication interface, for realizing more cascades of the reactive power compensator.
- 10. reactive power compensator according to claim 9, it is characterised in that described logical Communication interface is RS485 communication interfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610405240.9A CN107482640A (en) | 2016-06-08 | 2016-06-08 | Reactive power compensation circuit and reactive power compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610405240.9A CN107482640A (en) | 2016-06-08 | 2016-06-08 | Reactive power compensation circuit and reactive power compensator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107482640A true CN107482640A (en) | 2017-12-15 |
Family
ID=60594317
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610405240.9A Pending CN107482640A (en) | 2016-06-08 | 2016-06-08 | Reactive power compensation circuit and reactive power compensator |
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| CN205829173U (en) * | 2016-06-08 | 2016-12-21 | 北京博瑞莱智能科技集团有限公司 | Reactive power compensation circuit and reactive power compensator |
-
2016
- 2016-06-08 CN CN201610405240.9A patent/CN107482640A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110063759A1 (en) * | 2009-09-14 | 2011-03-17 | Electronic Systems Protection, Inc. | Hybrid Switch Circuit |
| CN102946106A (en) * | 2012-11-27 | 2013-02-27 | 常州市宏大电气有限公司 | Silicon controlled rectifier combination switch |
| CN203859527U (en) * | 2014-04-19 | 2014-10-01 | 刘爱民 | Improved capacitor switching circuit |
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