CN216720922U - Three-phase unbalance compensation functional circuit - Google Patents
Three-phase unbalance compensation functional circuit Download PDFInfo
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- CN216720922U CN216720922U CN202220025115.6U CN202220025115U CN216720922U CN 216720922 U CN216720922 U CN 216720922U CN 202220025115 U CN202220025115 U CN 202220025115U CN 216720922 U CN216720922 U CN 216720922U
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Abstract
The utility model belongs to the technical field of three-phase unbalance adjusting circuits, and discloses a three-phase unbalance compensating functional circuit which comprises a transformer group, a rectifier bridge group, a current transformer group, an MCU (microprogrammed control unit) controller and a three-phase unbalance compensator, wherein the transformer group is arranged on a three-phase power supply, the output end of the transformer group is electrically connected with the input end of the rectifier bridge group, the output end of the rectifier bridge group is electrically connected with the MCU controller, the current transformer group is arranged on the three-phase power supply, the output end of the current transformer group is electrically connected with a digital meter, the digital meter is electrically connected with the MCU controller, the input end of the three-phase unbalance compensator is electrically connected with the MCU controller, and the output end of the three-phase unbalance compensator is electrically connected with the three-phase power supply. The utility model improves the safety and the continuity of the three-phase unbalance compensation functional circuit, and is convenient for the intelligent management of the three-phase unbalance compensator.
Description
Technical Field
The utility model belongs to the technical field of three-phase unbalance regulating circuits, and particularly relates to a three-phase unbalance compensating functional circuit.
Background
In a circuit system, particularly in a low-voltage three-phase four-wire civil power supply system, because most of power consumers are single-phase loads or single-phase and three-phase loads which are mixed, and the loads are different in size and different in power utilization time, the three phases of a power grid are unbalanced, power compensation needs to be carried out by loading a three-phase unbalanced compensator, the power supply of the existing three-phase unbalanced compensator generally adopts a single-phase power supply mode, namely, power is taken from a certain phase in three-phase voltage, and direct current is provided for the three-phase unbalanced compensator after transformer transformation and rectification, the mode is relatively dead and lacks safety and intelligence, and if the power taking phase fails or a transformer is damaged, the three-phase unbalanced compensator cannot work, and the situation needs to be changed.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a functional circuit for three-phase imbalance compensation, which solves the above-mentioned problems.
For realizing the purpose of the above utility model, the technical scheme adopted is as follows:
the utility model provides a unbalanced three phase compensation's functional circuit, includes transformer group, rectifier bridge group, current transformer group, MCU controller and unbalanced three phase compensator, the transformer group is located three phase current, the output of transformer group with rectifier bridge group's input electric connection, rectifier bridge group's output with MCU controller electric connection, current transformer group locates on the three phase current, current transformer group's output electric connection has the digital table, the digital table with MCU controller electric connection, unbalanced three phase compensator's input with MCU controller electric connection, unbalanced three phase compensator's output with three phase current electric connection.
The utility model is further configured to: the three-phase power supply comprises phase A electricity, phase B electricity and phase C electricity, the transformer set comprises a phase A transformer, a phase B transformer and a phase C transformer, the rectifier bridge set comprises a phase A rectifier bridge, a phase B rectifier bridge and a phase C rectifier bridge, and the current transformer set comprises a phase A current transformer, a phase B current transformer and a phase C current transformer.
The utility model is further configured to: the phase-change rectifier bridge comprises an MCU controller, a phase-change rectifier bridge, a phase-change transformer A, a phase-change transformer B, a phase-change transformer C, a phase-change rectifier bridge A, a phase-change rectifier bridge B, a phase-change rectifier bridge C, a phase-change rectifier bridge B, a phase-change rectifier bridge C, a phase-change rectifier bridge and a phase-change rectifier bridge C, a phase-change rectifier bridge 1, a phase-change rectifier bridge, a phase-change rectifier bridge, a phase-bridge, a phase-change rectifier bridge, a phase-change rectifier bridge, a phase-bridge, a phase-bridge.
The utility model is further configured to: the phase current transformer A, the phase current transformer B and the phase current transformer C are respectively and correspondingly arranged on the phase electricity A, the phase electricity B and the phase electricity C, the output ends of the phase current transformer A, the phase current transformer B and the phase current transformer C are respectively and correspondingly connected with the digital meter, and the three digital meters are respectively and electrically connected with the pin 4, the pin 5 and the pin 6 of the MCU controller.
The utility model is further configured to: fuses are connected in series on the phase A electricity, the phase B electricity and the phase C electricity.
The utility model is further configured to: the phase A transformer comprises a primary coil x1 and a secondary coil x2, one end of the primary coil x1 is connected with phase A electricity, the other end of the primary coil x1 is connected with a zero line N, and two ends of the secondary coil x2 are connected with the input end of the phase A rectifying bridge.
The utility model is further configured to: the phase B transformer comprises a primary coil y1 and a secondary coil y2, one end of the primary coil y1 is connected with phase B electricity, the other end of the primary coil y1 is connected with a zero line N, and two ends of the secondary coil y2 are connected with the input end of the phase B rectifying bridge.
The utility model is further configured to: the phase-C transformer comprises a primary coil z1 and a secondary coil z2, one end of the primary coil z1 is connected with phase-C electricity, the other end of the primary coil z1 is connected with a zero line N, and two ends of the secondary coil z2 are connected with the input end of the phase-C rectifying bridge.
The utility model is further configured to: and the output ends of the phase-change rectifier bridge A, the phase-change rectifier bridge B and the phase-change rectifier bridge C output 14V direct-current power supply or 50V direct-current power supply.
In summary, compared with the prior art, the utility model discloses a functional circuit for three-phase unbalance compensation, wherein a transformer set is arranged on a three-phase power supply, the output end of the transformer set is electrically connected with the input end of a rectifier bridge set, the output end of the rectifier bridge set is electrically connected with an MCU (microprogrammed control unit), a current transformer set is arranged on the three-phase power supply, the output end of the current transformer set is electrically connected with a digital meter, the digital meter is electrically connected with the MCU, the input end of the three-phase unbalance compensator is electrically connected with the MCU, and the output end of the three-phase unbalance compensator is electrically connected with the three-phase power supply. By the arrangement, the safety and the continuity of the three-phase unbalance compensation functional circuit are improved, and the intelligent management of the three-phase unbalance compensator is facilitated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a circuit diagram of a three-phase imbalance compensation functional circuit provided in the present embodiment;
fig. 2 is a block diagram of a functional circuit for three-phase imbalance compensation according to the present embodiment.
Reference numerals: 10. a transformer bank; 11. a phase transformer; 12. a phase B transformer; 13. c, a phase transformer; 20. a rectifier bridge group; 21. a, a phase change rectifier bridge; 22. b, a phase change rectifier bridge; 23. c, a phase change rectifier bridge; 30. a current transformer group; 31. an A-phase current transformer; 32. a B-phase current transformer; 33. a C-phase current transformer; 40. an MCU controller; 50. a three-phase imbalance compensator; 60. a digital meter; 70. and a fuse.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, it being understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the present invention described above may be combined with each other as long as they do not conflict with each other.
A three-phase unbalance compensation functional circuit is shown in fig. 1 and fig. 2, and comprises a transformer group 10, a rectifier bridge group 20, a current transformer group 30, an MCU controller 40 and a three-phase unbalance compensator 50, wherein the transformer group 10 is arranged on a three-phase power supply, the output end of the transformer group 10 is electrically connected with the input end of the rectifier bridge group 20, the output end of the rectifier bridge group 20 is electrically connected with the MCU controller 40, the current transformer group 30 is arranged on the three-phase power supply, the output end of the current transformer group 30 is electrically connected with a digital meter 60, the digital meter 60 is electrically connected with the MCU controller 40, the input end of the three-phase unbalance compensator 50 is electrically connected with the MCU controller 40, and the output end of the three-phase unbalance compensator 50 is electrically connected with the three-phase power supply.
In the specific implementation engineering, the three-phase power supply includes an a-phase power supply, a B-phase power supply and a C-phase power supply, the transformer set 10 includes an a-phase transformer 11, a B-phase transformer 12 and a C-phase transformer 13, the rectifier bridge set 20 includes an a-phase rectifier bridge 21, a B-phase rectifier bridge 22 and a C-phase rectifier bridge 23, and the current transformer set 30 includes an a-phase current transformer 31, a B-phase current transformer 32 and a C-phase current transformer 33.
Further, phase a transformer 11, phase B transformer 12 and phase C transformer 13 are respectively and correspondingly located phase a electricity, phase B electricity and phase C electricity, the output ends of phase a transformer 11, phase B transformer 12 and phase C transformer 13 are respectively and correspondingly connected to the input ends of phase a rectifier bridge 21, phase B rectifier bridge 22 and phase C rectifier bridge 23, and the output ends of phase a rectifier bridge 21, phase B rectifier bridge 22 and phase C rectifier bridge 23 are respectively and correspondingly connected to No. 1 pin, No. 2 pin and No. 3 pin of MCU controller 40.
The phase-A current transformer 31, the phase-B current transformer 32 and the phase-C current transformer 33 are respectively and correspondingly arranged on the phase-A electricity, the phase-B electricity and the phase-C electricity, the output ends of the phase-A current transformer 31, the phase-B current transformer 32 and the phase-C current transformer 33 are respectively and correspondingly connected with the digital meter 60, and the three digital meters 60 are respectively and electrically connected with the No. 4 pin, the No. 5 pin and the No. 6 pin of the MCU controller 40.
The fuse 70 for improving safety is connected in series to each of the a-phase power, the B-phase power, and the C-phase power.
In this embodiment, the a-phase transformer 11 includes a primary coil x1 and a secondary coil x2, one end of the primary coil x1 is connected to the a-phase power, the other end of the primary coil x1 is connected to the neutral line N, two ends of the secondary coil x2 are connected to the input end of the a-phase rectifier bridge 21, the B-phase transformer 12 includes a primary coil y1 and a secondary coil y2, one end of the primary coil y1 is connected to the B-phase power, the other end of the primary coil y1 is connected to the neutral line N, two ends of the secondary coil y2 are connected to the input end of the B-phase rectifier bridge 22, the C-phase transformer 13 includes a primary coil z1 and a secondary coil z2, one end of the primary coil z1 is connected to the C-phase power, the other end of the primary coil z1 is connected to the neutral line N, and two ends of the secondary coil z2 are connected to the input end of the C-phase rectifier bridge 23.
Further, the output ends of the phase-change rectifier bridge a 21, the phase-change rectifier bridge B22 and the phase-change rectifier bridge C23 output 14V dc power or 50V dc power.
In the operation of the functional circuit for three-phase unbalance compensation, the phase a transformer 11 steps down the phase a electricity through its primary coil x1 and secondary coil x2 and outputs a dc voltage to the MCU controller 40 through the phase a rectifier bridge 21, the phase B transformer 12 steps down the phase B electricity through its primary coil y1 and secondary coil y2 and outputs a dc voltage to the MCU controller 40 through the phase B rectifier bridge 22, the phase C transformer 13 steps down the phase C electricity through its primary coil z1 and secondary coil z2 and outputs a dc voltage to the MCU controller 40 through the phase C rectifier bridge 23, and at the same time, the phase a current transformer 31 induces the phase a current and is displayed through the digital meter 60, the phase B current transformer 32 induces the phase B current and is displayed through the digital meter 60, the phase C phase current transformer 33 induces the phase C phase current and is displayed through the digital meter 60, MCU controller 40 obtains A looks electricity simultaneously, the display numerical value of digital table 60 of B looks electricity and C looks electricity is judged, if the single-phase unbalanced fault that appears of A looks electricity, then MCU controller 40 switches on the DC power supply of A looks phase change rectifier bridge 21 output to the unbalanced three-phase compensator, the unbalanced three-phase unbalanced compensator carries out unbalanced control and compensation to A looks electricity after receiving the DC power supply of No. 1 pin output, in order to realize the dynamic adjustment purpose, keep the electric wire netting stable, the same reason, after the single-phase unbalanced fault that appears of B looks electricity, MCU controller 40 switches on the DC power supply of B looks phase change rectifier bridge 22 output to the unbalanced three-phase unbalanced compensator, thereby realize safe, sustainable intelligent dynamic unbalanced control compensation.
In conclusion, the utility model has the following beneficial effects: the utility model discloses a three-phase unbalance compensation functional circuit, wherein the output end of a transformer group 10 is electrically connected with the input end of a rectifier bridge group 20, the output end of the rectifier bridge group 20 is electrically connected with an MCU (microprogrammed control Unit) controller 40, a current transformer group 30 is arranged on a three-phase power supply, the output end of the current transformer group 30 is electrically connected with a digital meter 60, the digital meter 60 is electrically connected with the MCU controller 40, the input end of a three-phase unbalance compensator 50 is electrically connected with the MCU controller 40, and the output end of the three-phase unbalance compensator 50 is electrically connected with the three-phase power supply. By the arrangement, the safety and the continuity of the three-phase unbalance compensation functional circuit are improved, and the intelligent management of the three-phase unbalance compensator is facilitated.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications derived therefrom are intended to be within the scope of the utility model.
Claims (9)
1. The utility model provides a unbalanced three phase compensation's functional circuit, its characterized in that, includes transformer group, rectifier bridge group, current transformer group, MCU controller and unbalanced three phase compensator, transformer group locates on three phase current, transformer group's output with rectifier bridge group's input electric connection, rectifier bridge group's output with MCU controller electric connection, current transformer group locates on the three phase current, current transformer group's output electric connection has the digital table, the digital table with MCU controller electric connection, unbalanced three phase compensator's input with MCU controller electric connection, unbalanced three phase compensator's output with three phase current electric connection.
2. The functional circuit of claim 1, wherein the three-phase power source comprises a phase-a power source, a phase-B power source and a phase-C power source, the transformer bank comprises a phase-a transformer, a phase-B transformer and a phase-C transformer, the rectifier bridge bank comprises a phase-a rectifier bridge, a phase-B rectifier bridge and a phase-C rectifier bridge, and the current transformer bank comprises a phase-a current transformer, a phase-B current transformer and a phase-C current transformer.
3. The functional circuit according to claim 2, wherein the phase-a transformer, the phase-B transformer and the phase-C transformer are respectively and correspondingly disposed on the phase-a power, the phase-B power and the phase-C power, output terminals of the phase-a transformer, the phase-B transformer and the phase-C transformer are respectively and correspondingly connected to input terminals of the phase-a rectifier bridge, the phase-B rectifier bridge and the phase-C rectifier bridge, and output terminals of the phase-a rectifier bridge, the phase-B rectifier bridge and the phase-C rectifier bridge are respectively and correspondingly connected to pin No. 1, pin No. 2 and pin No. 3 of the MCU controller.
4. The functional circuit for three-phase unbalance compensation according to claim 2, wherein the a-phase current transformer, the B-phase current transformer and the C-phase current transformer are respectively and correspondingly arranged on the a-phase power, the B-phase power and the C-phase power, the output ends of the a-phase current transformer, the B-phase current transformer and the C-phase current transformer are respectively and correspondingly connected with the digital meter, and the three digital meters are respectively and electrically connected with the pin 4, the pin 5 and the pin 6 of the MCU controller.
5. A functional circuit for three-phase unbalance compensation as defined in claim 2, wherein said a-phase power, said B-phase power and said C-phase power are connected in series with fuses.
6. The functional circuit for three-phase unbalance compensation according to claim 3, wherein said phase-A transformer comprises a primary coil x1 and a secondary coil x2, one end of said primary coil x1 is connected to phase-A electricity, the other end of said primary coil x1 is connected to neutral line N, and both ends of said secondary coil x2 are connected to the input ends of said phase-A rectifier bridge.
7. The functional circuit for three-phase unbalance compensation according to claim 3, wherein said B-phase transformer comprises a primary winding y1 and a secondary winding y2, one end of said primary winding y1 is connected to B-phase power, the other end of said primary winding y1 is connected to neutral N, and two ends of said secondary winding y2 are connected to input ends of said B-phase rectifier bridge.
8. A functional circuit for three-phase unbalance compensation as defined in claim 3, wherein said C-phase transformer comprises a primary winding z1 and a secondary winding z2, one end of said primary winding z1 is connected to C-phase power, the other end of said primary winding z1 is connected to neutral N, and both ends of said secondary winding z2 are connected to input terminals of said C-phase change rectifier bridge.
9. The functional circuit for three-phase unbalance compensation according to claim 2, wherein the output terminals of said a phase-change rectifier bridge, said B phase-change rectifier bridge and said C phase-change rectifier bridge output 14V dc power or 50V dc power.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122348305 | 2021-09-27 | ||
| CN202122348305X | 2021-09-27 |
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| Publication Number | Publication Date |
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| CN216720922U true CN216720922U (en) | 2022-06-10 |
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| CN202220025115.6U Active CN216720922U (en) | 2021-09-27 | 2022-01-07 | Three-phase unbalance compensation functional circuit |
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| CN (1) | CN216720922U (en) |
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