CN208423801U - A kind of three phase capacitance switching control circuit and current transformer - Google Patents
A kind of three phase capacitance switching control circuit and current transformer Download PDFInfo
- Publication number
- CN208423801U CN208423801U CN201820814396.7U CN201820814396U CN208423801U CN 208423801 U CN208423801 U CN 208423801U CN 201820814396 U CN201820814396 U CN 201820814396U CN 208423801 U CN208423801 U CN 208423801U
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- phase
- switching control
- control circuit
- phase capacitance
- lead end
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- 239000003990 capacitor Substances 0.000 claims description 14
- 239000004065 semiconductor Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding 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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Abstract
The utility model provides a kind of three phase capacitance switching control circuit and current transformer, the three phase capacitance switching control circuit includes at least one minimum switching control system, the minimum switching control system includes three groups of three phase capacitances and two threephase switches, each group of three phase capacitance includes first lead end, the second lead end and third lead end, the first lead end of same group of three phase capacitance and the second lead end access the two-phase in three phase network by different threephase switches respectively, and third lead end is connected with the residue one of three phase network.The three phase capacitance switching control circuit of the utility model can eliminate the risk of alternate arcing short circuit.
Description
Technical field
The utility model relates to current transformer fields, and in particular to a kind of three phase capacitance switching control circuit and current transformer.
Background technique
Three-phase capacitor is the important component of LC filter, has indispensable work to maintaining output waveform to stablize
With, but when current transformer is standby, three-phase capacitor can continue consumption electric network reactive-load, increase line loss, would generally pass through at this time
Three phase capacitance switching control circuit cuts capacitor.
As shown in Figure 1, being a kind of existing three phase capacitance switching control circuit, three groups of contacts of threephase switch control electricity respectively
The three-phase of appearance, then by the actuation of contact and the investment of disconnection control three phase capacitance and cut out.However, in above-mentioned technical proposal,
There are the risks of alternate arcing short circuit for three phase capacitance switching control circuit.
Utility model content
The purpose of the utility model is to provide the three phase capacitance switching controls that one kind can eliminate alternate arcing short-circuit risks
Circuit and current transformer.
The utility model is to solve technical solution used by its technical problem:
A kind of three phase capacitance switching control circuit, including at least one minimum switching control system, the minimum switching control
System processed includes three groups of three phase capacitances and two threephase switches, and each group of three phase capacitance includes first lead end, the second lead end
With third lead end, the first lead end of same group of three phase capacitance and the second lead end pass through different threephase switch accesses respectively
Two-phase in three phase network, third lead end are connected with the residue one of three phase network.
Further, the three phase capacitance switching control circuit includes multiple minimum switching control systems, described more
A minimum switching control system is parallel with one another.
Further, the three phase capacitance switching control circuit further includes the control being connected with described two threephase switches
Module, the control module are used to control the closure and disconnection of the threephase switch.
Further, each group of three phase capacitance in three groups of three phase capacitances is all adopted by three identical two wire terminal capacitors
It is formed with delta connection or star connection.
Further, three-phase contactor can be used in any one threephase switch in described two threephase switches or semiconductor is opened
It closes.
The utility model also provides a kind of three phase capacitance switching control circuit comprising at least one minimum switching control system
System, the minimum switching control system include three groups of three phase capacitances and three threephase switches, and each group of three phase capacitance includes first
Lead end, the second lead end and third lead end, first lead end, the second lead end and the third lead of same group of three phase capacitance
The three-phase in three phase network is accessed at end by different threephase switches respectively.
The utility model also provides a kind of current transformer comprising net side circuit, pusher side circuit and above-mentioned three phase capacitance are thrown
Control circuit is cut, the three phase capacitance switching control circuit is set between power grid and the grid-side converter.
Compared with prior art, in the three phase capacitance switching control circuit of the utility model, each threephase switch is independent
A phase of three groups of three phase capacitances is controlled, so that the side of each threephase switch is isopotential point, it is thus eliminated that alternate arcing
Short-circuit risks.
Detailed description of the invention
The structural schematic diagram of the three phase capacitance switching control circuit of Fig. 1 prior art.
The structural schematic diagram of the three phase capacitance switching control circuit of Fig. 2 the utility model embodiment one.
The structural schematic diagram of the three phase capacitance switching control circuit of Fig. 3 the utility model embodiment two.
The structural schematic diagram of the three phase capacitance switching control circuit of Fig. 4 the utility model embodiment three.
The structural schematic diagram of the current transformer of Fig. 5 the utility model embodiment four.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
The realization of the utility model is described in detail below in conjunction with specific embodiment.
Embodiment one
As shown in Fig. 2, the utility model embodiment provides a kind of three phase capacitance switching control circuit comprising one by three
The minimum switching control system of phase capacitor C1, C2, C3 and threephase switch K1, K2 composition.
Each group of three phase capacitance in three phase capacitance C1, C2, C3 all uses triangle by three identical two wire terminal capacitors
Connection is formed, to be respectively formed first lead end X1, the second lead end X2 and third lead end on three vertex of triangle
X3.Threephase switch K1, K2 have three pairs of contacts, and each pair of contact all has a pair of of the connection terminal for being distributed in switch two sides.Separately
Outside, each group of three phase capacitance in three phase capacitance C1, C2, C3 can also use star connection by three identical two wire terminal capacitors
It is formed.
Three connection terminals (1,3,5 end) of the side threephase switch K1 are respectively connected to power grid A phase, the other side threephase switch K1
Three connection terminals (2,4,6 end) first lead end X1 with three phase capacitance C1, C2, C3 respectively, the side threephase switch K2
Three connection terminals (1,3,5 end) are respectively connected to power grid B phase, three connection terminals (2,4,6 of the other side of threephase switch K2
End) it is respectively connected to the second lead end X2 of three phase capacitance C1, C2, C3, the third lead end X3 of three phase capacitance C1, C2, C3 divide
It Jie Ru not power grid C phase.Wherein, a certain phase of the not specified power grid of power grid A phase, B phase, C phase.That is, in the minimum throwing
In cutting system, the first lead end of same group of three phase capacitance and the second lead end pass through different threephase switch access three-phases respectively
Wherein two-phase in power grid, third lead end are connected with the residue one of three phase network.
Further, the minimum switching control system further includes the control being connected respectively with described threephase switch K1, K2
Molding block (not shown), the control module are used to control the closure and disconnection of described threephase switch K1, K2.The control module
By closure threephase switch K1, K2 by capacitor C1, C2, C3 put into power grid, by disconnect threephase switch K1, K2 by capacitor C1, C2,
C3 is cut out from power grid.
Three-phase contactor or semiconductor switch can be used in described threephase switch K1, K2.
In above-mentioned three phase capacitance switching control circuit, two threephase switches are used, every group of three phase capacitance need to only utilize three
Phase switch control wherein two-phase, saves 1/3 contact capacity, reduces the control cost of three phase capacitance switching circuit；In addition, every
A phase in three groups of three phase capacitances of a threephase switch independent control, so that the side of each threephase switch is isopotential point, because
This eliminates alternate arcing short-circuit risks.
Embodiment two
As shown in figure 3, in embodiment two, the minimum switching control system includes three groups of three-phases compared with embodiment one
Capacitor C1, C2, C3 and three threephase switches K1, K2, K3, the first lead end of same group of three phase capacitance, the second lead end and
Three lead ends pass through the three-phase in different threephase switch access three phase networks respectively.
Embodiment three
As shown in figure 4, the three phase capacitance switching control circuit packet compared with embodiment one, embodiment two, in embodiment three
It includes three and implements minimum fling-cut system described in one or embodiment two, described three minimum fling-cut system parallel connection accesses are in power grid
In.
In the present embodiment, the minimum fling-cut system being parallel in power grid using three is electric to form the control of three phase capacitance switching
Road can meet the control requirement to different capabilities capacitor.
Further, according to the control requirement to different capabilities capacitor, it can choose the minimum switching by different number
System forms three phase capacitance switching control circuit, such as two or three or more, and details are not described herein.
Example IV
As shown in figure 5, providing a kind of current transformer in the present embodiment, being connected between power grid and motor comprising net
Side loop, pusher side circuit and three phase capacitance switching control circuit, the three phase capacitance switching control circuit are set to power grid and institute
It states between grid-side converter, the three phase capacitance switching control circuit is using embodiment one or implements described in two or embodiment three
Three phase capacitance switching control circuit.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (11)
1. a kind of three phase capacitance switching control circuit, which is characterized in that including at least one minimum switching control system, it is described most
Small switching control system includes three groups of three phase capacitances and two threephase switches, and each group of three phase capacitance includes first lead end, the
Two lead ends and third lead end, the first lead end of same group of three phase capacitance and the second lead end pass through different three-phases respectively
Two-phase in switch access three phase network, third lead end are connected with the residue one of three phase network.
2. three phase capacitance switching control circuit as described in claim 1, which is characterized in that the three phase capacitance switching control electricity
Road includes multiple minimum switching control systems, and the multiple minimum switching control system is parallel with one another.
3. three phase capacitance switching control circuit as described in claim 1, which is characterized in that further include being opened with described two three-phases
Close the control module being connected.
4. three phase capacitance switching control circuit as described in claim 1, which is characterized in that every in three groups of three phase capacitances
One group of three phase capacitance is all formed by three identical two wire terminal capacitors using delta connection or star connection.
5. three phase capacitance switching control circuit as described in claim 1, which is characterized in that appointing in described two threephase switches
Three-phase contactor or semiconductor switch can be used in one threephase switch.
6. a kind of three phase capacitance switching control circuit, which is characterized in that including at least one minimum switching control system, it is described most
Small switching control system includes three groups of three phase capacitances and three threephase switches, and each group of three phase capacitance includes first lead end, the
Two lead ends and third lead end, first lead end, the second lead end and the third lead end of same group of three phase capacitance lead to respectively
Cross the three-phase in different threephase switch access three phase networks.
7. three phase capacitance switching control circuit as claimed in claim 6, which is characterized in that the three phase capacitance switching control electricity
Road includes multiple minimum switching control systems, and the multiple minimum switching control system is parallel with one another.
8. three phase capacitance switching control circuit as claimed in claim 6, which is characterized in that further include being opened with three three-phases
Close the control module being connected.
9. three phase capacitance switching control circuit as claimed in claim 6, which is characterized in that every in three groups of three phase capacitances
One group of three phase capacitance is all formed by three identical two wire terminal capacitors using delta connection or star connection.
10. three phase capacitance switching control circuit as claimed in claim 6, which is characterized in that in three threephase switches
Three-phase contactor or semiconductor switch can be used in any one threephase switch.
11. a kind of current transformer comprising net side circuit, pusher side circuit and such as described in any item three phase capacitances of claim 1-10
Switching control circuit, the three phase capacitance switching control circuit are set between power grid and the grid-side converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820814396.7U CN208423801U (en) | 2018-05-29 | 2018-05-29 | A kind of three phase capacitance switching control circuit and current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820814396.7U CN208423801U (en) | 2018-05-29 | 2018-05-29 | A kind of three phase capacitance switching control circuit and current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208423801U true CN208423801U (en) | 2019-01-22 |
Family
ID=65112722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820814396.7U Expired - Fee Related CN208423801U (en) | 2018-05-29 | 2018-05-29 | A kind of three phase capacitance switching control circuit and current transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN208423801U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108565873A (en) * | 2018-05-29 | 2018-09-21 | 深圳市禾望电气股份有限公司 | A kind of three phase capacitance switching control circuit and current transformer |
-
2018
- 2018-05-29 CN CN201820814396.7U patent/CN208423801U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108565873A (en) * | 2018-05-29 | 2018-09-21 | 深圳市禾望电气股份有限公司 | A kind of three phase capacitance switching control circuit and current transformer |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190122 |