CN204631104U - A kind of circuit with symmetrical component method computing function - Google Patents
A kind of circuit with symmetrical component method computing function Download PDFInfo
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- CN204631104U CN204631104U CN201520146578.8U CN201520146578U CN204631104U CN 204631104 U CN204631104 U CN 204631104U CN 201520146578 U CN201520146578 U CN 201520146578U CN 204631104 U CN204631104 U CN 204631104U
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Abstract
The utility model relates to a kind of circuit with symmetrical component method computing function, it is characterized in that, three-phase and four-line input voltage is isolated phase shift by three-phase transformer, by advanced 60 degree of angle circuit and delayed 60 degree of angle circuit calibration, to be adjusted processing of circuit by addition and ratio, one group of positive sequence voltage can be exported, one group of backward voltage and residual voltage at output phase-shift circuit port.Realize symmetrical component method computing function completely.This circuit design thinking is simple and clear, and analog functuion is strong, and device uses device few, and wiring is simple, easy to maintenance, at colleges and universities' Electrical Laboratory as student experimenting device, also can apply when electric system correlation test setting device.
Description
Technical field
The utility model relates to a kind of circuit and the device thereof that can realize symmetrical component method computing function, is applicable to colleges and universities' Electrical Laboratory as student experimenting device, applies when being also applicable to electric system correlation test setting device.
Background technology
Symmetrical component method is that process asymmetrical three-phase circuit carries out effectively calculating good method.Available circuit and device to symmetrical component method simulation and processing circuitry more complicated, affect beginner to the understanding of this method and application.
Summary of the invention
In view of above-mentioned deficiency, the utility model relates to a kind of circuit with the method computing function that weighs, it is characterized in that, three-phase and four-line input voltage is isolated phase shift by three-phase transformer, by advanced 60 degree of angle circuit and delayed 60 degree of angle circuit calibration, to be adjusted processing of circuit by addition and ratio, one group of positive sequence voltage can be exported, one group of backward voltage and residual voltage at output phase-shift circuit port.Realize symmetrical component method computing function completely.This circuit design thinking is simple and clear, and analog functuion is strong, and device uses device few, and wiring is simple, easy to maintenance, at colleges and universities' Electrical Laboratory as student experimenting device, also can apply when electric system correlation test setting device.
Accompanying drawing explanation
Fig. 1 is the utility model embodiment theory diagram.
Fig. 2 is the external terminal schematic diagram of the utility model embodiment.
Fig. 3 is the physical circuit figure of the utility model embodiment.
Embodiment
As shown in Figure 1, Figure 2, Fig. 3, the present invention is to provide a kind of symmetrical component method computing function of having.Circuit, comprising: three-phase transformer, advanced 60 degree of angle circuit, delayed 60 degree of angle circuit, and addition and ratio are adjusted circuit, exports phase-shift circuit and forms.The b phase of three-phase transformer pair side and c are connected to advanced 60 degree of circuit and delayed 60 degree of circuit, to be adjusted circuit by addition and ratio, again by two single transformers and advanced 60 degree of circuit and delayed 60 degree of electrical combination, output one group of positive-sequence component voltage, backward component voltage and zero-sequence component voltage can be realized.Described three-phase transformer pair side a phase and main side's same-phase, b phase is contrary with main side's phase place with c phase, and three-phase transformer pair side b phase, c phase connect with advanced 60 degree and delayed 60 degree of electrical combination, be connected with output phase-shift circuit through addition and ratio circuit of adjusting.Single transformer in described output phase-shift circuit is anti-phase to connect, and connects with delayed 60 degree of electrical combination with advanced 60 degree.
In Fig. 3, three-phase and four-line voltage is added in the former side of three-phase transformer, transformer pair side a phase Same Name of Ends is consistent with main side's Same Name of Ends, b phase is contrary with main side's Same Name of Ends with c phase Same Name of Ends, so Ua phase place is consistent with UA, b end and c hold output to be-Ub and-Uc,-Ub is by delayed 60 degree of circuit, make the phasing degree of Ub ' equal UB* ,-Uc, by advanced 60 degree of circuit, makes the angle of Uc ' equal UC*
.To be adjusted by addition and ratio the effect of circuit, ensure U1a=K*
(UA+UB*
+ UC*
), meet the calculating formula (wherein K has comprised the no-load voltage ratio of three-phase transformer and the amplification coefficient of each operational amplification circuit) of positive-sequence component in symmetrical component method.U1a is again through a single transformer, and transformer is anti-phase connection, then accesses advanced 60 degree of circuit and delayed 60 degree of circuit define U1b and U1c, has so just had U1a, U1b and U1c to be positive sequence voltage component.(see the corresponding voltage vector-diagram of Fig. 3).In like manner, Ua ,-Ub and-Uc
by corresponding advanced
circuit and delayed
the combination of circuit, makes U2a=K*
(UA+UB*
+ UC*
), meet the calculating formula of weighing method backward component, U2a, again through the anti-phase connection of a single transformer and access advanced 60 degree of circuit and delayed 60 degree of circuit form U2b and U2c, so just has U2a, U2b, U2c are negative sequence voltage components (see the corresponding voltage vector-diagram of Fig. 3).Zero-sequence component: U3a=U3b=U3c=K*
(UA+UB+UC).
So foregoing circuit can realize the computing function of symmetrical component method very well, as long as input port exports three-phase and four-line voltage, this circuit can export positive sequence, backward, residual voltage.This circuit and device are applicable to colleges and universities' Electrical Laboratory simulated experiment, also can be applied to electric system correlation test setting device and equipment.Wherein, in Fig. 3, U is with all amounts of subscript to be vector, and the DC current in Fig. 3 is ± 24V.
Be more than preferred embodiment of the present utility model, all changes done according to the technology of the present invention, when the function produced does not exceed the scope of technical solutions of the utility model, all belong to protection scope of the present invention.
Claims (1)
1. one kind has the circuit of symmetrical component method computing function, it is characterized in that: three-phase and four-line input voltage is isolated phase shift by three-phase transformer, through advanced 60 degree of circuit and delayed 60 degree of circuit calibration, to adjust processing of circuit through an addition and ratio, the output terminal exporting phase-shift circuit exports one group of positive sequence voltage, one group of backward voltage and residual voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520146578.8U CN204631104U (en) | 2015-03-16 | 2015-03-16 | A kind of circuit with symmetrical component method computing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520146578.8U CN204631104U (en) | 2015-03-16 | 2015-03-16 | A kind of circuit with symmetrical component method computing function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204631104U true CN204631104U (en) | 2015-09-09 |
Family
ID=54050121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520146578.8U Expired - Fee Related CN204631104U (en) | 2015-03-16 | 2015-03-16 | A kind of circuit with symmetrical component method computing function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204631104U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655909A (en) * | 2015-03-16 | 2015-05-27 | 福建农林大学 | Circuit with symmetrical component method calculation function |
-
2015
- 2015-03-16 CN CN201520146578.8U patent/CN204631104U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655909A (en) * | 2015-03-16 | 2015-05-27 | 福建农林大学 | Circuit with symmetrical component method calculation function |
| CN104655909B (en) * | 2015-03-16 | 2017-12-08 | 福建农林大学 | A kind of circuit with symmetrical component method computing function |
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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 |
Granted publication date: 20150909 Termination date: 20180316 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |