CN207200289U - A kind of electric capacity monomer switching device - Google Patents
A kind of electric capacity monomer switching device Download PDFInfo
- Publication number
- CN207200289U CN207200289U CN201721173324.0U CN201721173324U CN207200289U CN 207200289 U CN207200289 U CN 207200289U CN 201721173324 U CN201721173324 U CN 201721173324U CN 207200289 U CN207200289 U CN 207200289U
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- Prior art keywords
- electric capacity
- switching
- relay
- slow
- capacity unit
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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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Abstract
A kind of electric capacity monomer switching device is the utility model is related to, switching is carried out to compensating electric capacity unit, described switching device includes controlling switch BK0, slow-operating relay BK2, switching relay BK1, buffer resistance R1With discharge resistance R2, described controlling switch BK0 connects with slow-operating relay BK2 coil, described slow-operating relay BK2 contact, buffer resistance R1It is sequentially connected in series with compensating electric capacity unit, described switching relay BK1 normally opened contact is connected in parallel on buffer resistance R1Both ends, described switching relay BK1 normally-closed contact, discharge resistance R2After series connection, described compensating electric capacity unit both ends are connected in parallel on, described switching relay BK1 coils from parallel connection of coils is at compensating electric capacity unit both ends.Compared with prior art, there is the utility model switching to impact the advantages that small without harmonic effects, switching.
Description
Technical field
Electric power quality optimisation technique field is the utility model is related to, is used for low-voltage reactive power more particularly, to one kind
The electric capacity monomer switching device of compensation system.
Background technology
Existing reactive power compensator is broadly divided into the passive and class of active compensation two, wherein Passively compensated device is with static reacance
Compensator (SVC) is main flow compensation device, and for wherein electric capacity as main compensation medium, its advantage is that cost is low, control method
Simply, technology maturation, existing capacitor switching reactive power compensator is in order to avoid the overvoltage such as generation arcing during capacitor cell switching
Overcurrent condition, operating passing zero synchro switch or combination switch technology mainly are used, but device is complex, and work as compensating unit
The more demand cost of number is higher.
Utility model content
The purpose of this utility model is exactly to provide a kind of electric capacity monomer the defects of overcoming above-mentioned prior art to exist
Switching device, it can solve the problem that traditional SVC device switching impact is big, compensation precision is low, be not suitable for the problems such as frequent switching, meanwhile,
Installation cost is relatively low, simple in construction.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of electric capacity monomer switching device, switching is carried out to compensating electric capacity unit, described switching device is opened including control
Close BK0, slow-operating relay BK2, switching relay BK1, buffer resistance R1With discharge resistance R2, described controlling switch BK0 is with delaying
Rush relay BK2 coil series connection, described slow-operating relay BK2 contact, buffer resistance R1With compensating electric capacity unit successively
Series connection, described switching relay BK1 normally opened contact are connected in parallel on buffer resistance R1Both ends, described switching relay BK1's
Normally-closed contact, discharge resistance R2After series connection, described compensating electric capacity unit both ends are connected in parallel on, described switching relay BK1's
Coils from parallel connection of coils is at compensating electric capacity unit both ends.
Preferably, described controlling switch BK0 connects with slow-operating relay BK2 coil is followed by control both ends of power.
Compared with prior art, the utility model has that system architecture is simple, and investment is small, and switching is without harmonic effects, switching
Impact small.
Brief description of the drawings
Fig. 1 is circuit diagram of the present utility model.
Wherein BK0 is controlling switch, and BK2 is slow-operating relay, NOBK2For the contact of slow-operating relay, BK1 be switching after
Electrical equipment, NOBK1For the normally opened contact of switching relay, NCBK1For the normally-closed contact of switching relay, R1For buffer resistance, R2To put
Resistance, C are compensating electric capacity unit, and DC1 is control power supply.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that described embodiment is part of the embodiment of the present utility model, rather than is all implemented
Example.Based on the embodiment in the utility model, those of ordinary skill in the art institute on the premise of creative work is not made
The every other embodiment obtained, it should all belong to the scope of the utility model protection.
As shown in figure 1, electric capacity monomer switching device, carries out switching, described switching device includes to compensating electric capacity unit
Controlling switch BK0, slow-operating relay BK2, switching relay BK1, buffer resistance R1With discharge resistance R2, described controlling switch
BK0 connects with slow-operating relay BK2 coil, described slow-operating relay BK2 contact, buffer resistance R1Mended with low-voltage capacitance
The compensating electric capacity unit for repaying cabinet is sequentially connected in series, and described switching relay BK1 normally opened contact is connected in parallel on buffer resistance R1Both ends,
Switching relay BK1 normally-closed contact, discharge resistance R2After series connection, described compensating electric capacity unit both ends are connected in parallel on, it is described
Switching relay BK1 coils from parallel connection of coils is at compensating electric capacity unit both ends.
The switching process of compensating electric capacity unit is as follows：
1) when device input compensation unit, control system closes controlling switch BK0, slow-operating relay BK2 by ordering
It is electric on coil, the contact NO of slow-operating relayBK2Adhesive, compensating electric capacity unit C pass through buffer resistance R1Access external system, electricity
Appearance builds pressure.
2) when compensating electric capacity unit C-terminal mouth voltage reaches switching relay BK1 coil voltages U1When, switching relay it is normal
Open contact NOBK1Adhesive, short-circuit buffer resistance R1, because electric capacity terminal voltage is consistent with external system, it is existing to avoid input electric discharge
As.
When device cuts off compensating unit, BK0 is opened, BK2 coil losing electricities, the contact NO of slow-operating relayBK2Open, throw
Cut relay BK1 coil losing electricities, the normally opened contact NO of switching relayBK1Open, the normally-closed contact NC of switching relayBK1Close
On, compensating unit discharges residual charge by discharge resistance, avoids excision electric discharge phenomena.
It is described above, only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art can readily occur in various in the technical scope that the utility model discloses
Equivalent modifications or substitutions, these modifications or substitutions should all cover within the scope of protection of the utility model.Therefore, this practicality
New protection domain should be defined by scope of the claims.
Claims (2)
1. a kind of electric capacity monomer switching device, switching is carried out to compensating electric capacity unit, it is characterised in that described switching device bag
Include controlling switch BK0, slow-operating relay BK2, switching relay BK1, buffer resistance R1With discharge resistance R2, described control opens
Close BK0 to connect with slow-operating relay BK2 coil, described slow-operating relay BK2 contact, buffer resistance R1And compensating electric capacity
Unit is sequentially connected in series, and described switching relay BK1 normally opened contact is connected in parallel on buffer resistance R1Both ends, described switching relay
Device BK1 normally-closed contact, discharge resistance R2After series connection, described compensating electric capacity unit both ends, described switching relay are connected in parallel on
Device BK1 coils from parallel connection of coils is at compensating electric capacity unit both ends.
A kind of 2. electric capacity monomer switching device according to claim 1, it is characterised in that described controlling switch BK0 with
Slow-operating relay BK2 coil series connection is followed by control both ends of power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721173324.0U CN207200289U (en) | 2017-09-13 | 2017-09-13 | A kind of electric capacity monomer switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721173324.0U CN207200289U (en) | 2017-09-13 | 2017-09-13 | A kind of electric capacity monomer switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207200289U true CN207200289U (en) | 2018-04-06 |
Family
ID=61788855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721173324.0U Active CN207200289U (en) | 2017-09-13 | 2017-09-13 | A kind of electric capacity monomer switching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207200289U (en) |
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2017
- 2017-09-13 CN CN201721173324.0U patent/CN207200289U/en active Active
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