CN203166786U - Twelve-pulse rectification device - Google Patents
Twelve-pulse rectification device Download PDFInfo
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- CN203166786U CN203166786U CN 201320076867 CN201320076867U CN203166786U CN 203166786 U CN203166786 U CN 203166786U CN 201320076867 CN201320076867 CN 201320076867 CN 201320076867 U CN201320076867 U CN 201320076867U CN 203166786 U CN203166786 U CN 203166786U
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Abstract
The utility model, which belongs to the transformer technology field, relates to a twelve-pulse rectification device. The twelve-pulse rectification device comprises a rectifier transformer as well as a first basic rectification cabinet and a second basic rectification cabinet, wherein the two basic rectification cabinets are completely identical with each other. A primary side of the rectifier transformer is connected with a power grid; a secondary-side upper end and a secondary-side lower end of the rectifier transformer are respectively connected with the first basic rectification cabinet and the second basic rectification cabinet; the first basic rectification cabinet and the second basic rectification cabinet are connected in parallel; and the rectifier transformer is used to supply power for two groups of basic rectification cabinets with the same rated power. With utilization of the twelve-pulse rectification device, the harmonic interference on the power grid by the rectification device can be reduced. The two basic rectification cabinets are connected in parallel; the structure of the device is designed reasonably; the device is economic and practical; the pollution on the power grid is reduced; and the effects of energy saving and environmental protection are realized.
Description
Technical field
The utility model relates to a kind of transformer, especially a kind of 12 pulsating wave rectification, and it belongs to the transformer technology field.
Background technology
At present, controllable rectifying device adopts six pulse wave rectifier transformers in the prior art, along with the voltage of rectifying device and further expanding of power, harmonic number will increase, cause a large amount of higher harmonic currents will flow through whole electric power system, motor also can the heating loss increase the weight of, whole network system is interfered, produce and pollute, in order effectively to eliminate or to alleviate the harmonic wave of rectifying device to the influence of electrical network, must take to suppress measure with harmonic wave by relevant requirements, guarantee that the power supply quality of consumer networks reaches standard.
The utility model content
Technical problem to be solved in the utility model is, overcomes the defective that prior art exists, and provides a kind of and can alleviate humorous wave interference, reduces the voltage pulse rate of rectification output, economical and practical 12 pulsating wave rectification.
The technical scheme in the invention for solving the above technical problem is: a kind of 12 pulsating wave rectification, comprise rectifier transformer and two identical first basic rectifier cabinets, the second basic rectifier cabinet, and it is characterized in that:
The primary side of described rectifier transformer connects electrical network, secondary side upper end in the rectifier transformer is connected the first basic rectifier cabinet and the second basic rectifier cabinet respectively with the secondary side lower end, this first basic rectifier cabinet and the second basic rectifier cabinet parallel connection, and be the basic rectifier cabinets power supplies of identical two groups of rated power by rectifier transformer; The basic rectifier cabinet of respectively organizing of redundant parallel has separately control unit, therefore respectively organizing basic rectifier cabinet is complete independent operating, and basic rectifier cabinet in parallel is only by a control unit control, just as same powerful basic rectifier cabinet, the supply voltage of redundant basic rectifier cabinet is in full accord, when normally moving, even be uncontrollable basic rectifier cabinet, the distribution of its electric current is also very balanced, in the time of design, can more select;
The first basic rectifier cabinet comprises circuit breaker, fast acting fuse, three-phase alternating current inlet wire reactor, three-phase bridge rectifier circuit and direct current outlet air core reactor one, described circuit breaker one end is connected with secondary side upper end in the rectifier transformer, the other end links to each other with fast acting fuse, the other end of fast acting fuse links to each other with three-phase alternating current inlet wire reactor, this three-phase alternating current inlet wire reactor links to each other with the corresponding end of three-phase bridge rectifier circuit, the other end of three-phase bridge rectifier circuit is the positive pole of the first basic rectifier cabinet, the positive pole of this first basic rectifier cabinet links to each other with an end of direct current outlet air core reactor one, the outlet of direct current outlet air core reactor one is as the output plus terminal of common DC bus positive pole, the cathode output end of the second basic rectifier cabinet is as the output negative terminal of common DC bus negative pole, the outlet of the direct current outlet air core reactor two in the outlet of the direct current outlet air core reactor one in the first basic rectifier cabinet and the second basic rectifier cabinet links to each other, and the negative pole of the first basic rectifier cabinet links to each other with the negative pole of the second basic rectifier cabinet;
Circuit breaker can be used to distribute electric energy; do not start asynchronous motor continually; power circuit and motor etc. are carried out protection; can automatic shutdown circuit when serious overload or short circuit and fault such as under-voltage take place for their; fast acting fuse mainly plays short circuit, overload protection in rectifying device; series reactor is mainly used to limiting short-circuit current and higher Harmonics in Electric Power Network, by three-phase bridge rectifier circuit alternating current is converted to galvanic circuit.
All there are three groups of coilings secondary side upper end in the rectifier transformer described in the utility model with the secondary side lower end, and each group coiling links to each other with three-phase bridge rectifier circuit with fast acting fuse, three-phase alternating current inlet wire reactor through behind the circuit breaker respectively; All there are three groups of coilings the secondary side upper end with the secondary side lower end, is equivalent to the parallel connection of two six pulse waves, and namely 12 pulsating wave has reduced the interference of harmonic wave to electrical network greatly.
Three-phase bridge rectifier circuit described in the utility model is formed by six rectifier diodes; Six rectifier diodes constitute cathode group and anode group altogether altogether, and three-phase bridge rectifier circuit is converted to galvanic circuit to alternating current.
Secondary side described in the utility model upper end differs from 30 degree with secondary side lower end phase entry; Use the multi-phase operation of transformer, make phase difference 30 degree, two transformers that make up as Y-△, △-△ constitute the effect that is equivalent to 12 pulsating wave, then can reduce low-order harmonic electric current 28%, have played the effect of good restraining harmonic wave.
The utility model compared with prior art has the following advantages and effect: alleviate rectifying device to the humorous wave interference of electrical network, and the parallel connection of two basic rectifier cabinets, reasonable in design, economical and practical, reduce the pollution of electrical network, play effect in energy saving and environmental protection.
Description of drawings
Fig. 1 is the electrical block diagram of the utility model 12 pulsating wave rectification.
Among the figure: rectifier transformer 1, the first basic rectifier cabinet 2, the second basic rectifier cabinet 3 once surveys 11, secondary side upper end 12, secondary side lower end 13, three-phase bridge rectifier circuit 21, circuit breaker Q 1, Q2, fast acting fuse F1, F4, three-phase alternating current inlet wire reactor 1L1,2L1, the anodal DC1+ of the first basic rectifier cabinet, the negative pole DC1-of the first basic rectifier cabinet, the anodal DC2+ of the second basic rectifier cabinet, the negative pole DC2-of the second basic rectifier cabinet, direct current outlet air core reactor one 1L2, direct current outlet air core reactor two 2L2, the anodal DC+ of common DC bus, common DC bus negative pole DC-, rectifier diode D1-D6.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
Referring to Fig. 1, a kind of 12 pulsating wave rectification of present embodiment, comprise rectifier transformer 1 and two identical first basic rectifier cabinets 2, the second basic rectifier cabinet 3, the primary side 11 of rectifier transformer 1 connects electrical network, secondary side in the rectifier transformer 1 upper end 12 is connected the first basic rectifier cabinet 2 and the second basic rectifier cabinet 3 respectively with secondary side lower end 13, this first basic rectifier cabinet 2 and second basic rectifier cabinet 3 parallel connections, and be that the basic rectifier cabinets of identical two groups of rated power are powered by rectifier transformer 1; The basic rectifier cabinet of respectively organizing of redundant parallel has separately control unit, therefore respectively organizing basic rectifier cabinet is complete independent operating, and basic rectifier cabinet in parallel is only by a control unit control, just as same powerful basic rectifier cabinet, the supply voltage of redundant basic rectifier cabinet is in full accord, when normally moving, even be uncontrollable basic rectifier cabinet, the distribution of its electric current is also very balanced, in the time of design, can more select;
The first basic rectifier cabinet 2 comprises circuit breaker Q 1, fast acting fuse F1, three-phase alternating current inlet wire reactor 1L1, three-phase bridge rectifier circuit 21 and direct current outlet air core reactor one 1L2, described circuit breaker Q 1 one ends are connected with secondary side upper end 12 in the rectifier transformer 1, the other end links to each other with fast acting fuse F1, the other end of fast acting fuse F1 links to each other with three-phase alternating current inlet wire reactor 1L1, this three-phase alternating current inlet wire reactor 1L1 links to each other with the corresponding end of three-phase bridge rectifier circuit 21, the other end of three-phase bridge rectifier circuit 21 is the anodal DC1+ of the first basic rectifier cabinet 2, the anodal DC1+ of this first basic rectifier cabinet 2 links to each other with the end of direct current outlet air core reactor one 1L2, the outlet of direct current outlet air core reactor one 1L2 is as the output plus terminal of the anodal DC+ of common DC bus, the negative pole DC2-output of the second basic rectifier cabinet 3 is as the output negative terminal of common DC bus negative pole DC-, the outlet of direct current outlet air core reactor two 2L2 in the outlet of direct current outlet air core reactor one 1L2 in the first basic rectifier cabinet 2 and the second basic rectifier cabinet 3 links to each other, and the negative pole DC1-of the first basic rectifier cabinet 2 links to each other with the negative pole DC2-of the second basic rectifier cabinet 3;
Circuit breaker Q 1 can be used to distribute electric energy; do not start asynchronous motor continually; power circuit and motor etc. are carried out protection; can automatic shutdown circuit when serious overload or short circuit and fault such as under-voltage take place for their; fast acting fuse F1 mainly plays short circuit, overload protection in rectifying device; series reactor is mainly used to limiting short-circuit current and higher Harmonics in Electric Power Network, by three-phase bridge rectifier circuit 21 alternating current is converted to galvanic circuit.
All there are three groups of coilings secondary side upper end 12 in the present embodiment in the rectifier transformer 1 with secondary side lower end 13, and each group coiling links to each other with three-phase bridge rectifier circuit 21 with fast acting fuse F1, three-phase alternating current inlet wire reactor 1L1 through circuit breaker Q 1 back respectively; All there are three groups of coilings secondary side upper end 12 with secondary side lower end 13, is equivalent to the parallel connection of two six pulse wave rectifiers, and namely 12 pulsating wave has reduced the interference of harmonic wave to electrical network greatly.
Three-phase bridge rectifier circuit 21 is formed by six rectifier diode D1-D6 in the present embodiment; Six rectifier diode D1-D6 constitute cathode group and anode group altogether altogether, and three-phase bridge rectifier circuit 21 is converted to galvanic circuit to alternating current.
Secondary side upper end 12 differs from 30 degree with secondary side lower end 13 phase entries in the present embodiment; Use the multi-phase operation of transformer, make phase difference 30 degree, two transformers that make up as Y-△, △-△ constitute the effect that is equivalent to 12 pulsating wave, then can reduce low-order harmonic electric current 28%, have played the effect of good restraining harmonic wave.
In the present embodiment, rectifier transformer secondary side upper end winding is " Y " wiring, and rectifier transformer primary side and rectifier transformer secondary side lower end winding are " △ " wiring.
During use, secondary side upper end 12 is △ UK≤5% with the difference that secondary side lower end 13 short-circuit voltages compare, secondary side upper end 12 is △ UK≤5% with the difference of secondary side lower end 13 no-load voltage ratios, between rectifier transformer 1 and two first basic rectifier cabinets 2, basic rectifier cabinet 3, use same power cable, be same model, same cross-sectional area and equal length, the relative short-circuit voltage of rectifier transformer 1 is than UK 〉=4%, and rectifier transformer 1 must be symmetrical, and the recommendation connection is Dy5do.
Rectifier transformer 1 is the first basic rectifier cabinet 2 of two groups of identical redundancies of rated power, the second basic rectifier cabinet 3 provides, because the first basic rectifier cabinet 2 of two groups of redundancies and the supply voltage of the second basic rectifier cabinet 3 are in full accord, during normal the operation, even be uncontrollable basic rectifier cabinet, the distribution of its electric current can be designed to half of total current, also should consider current stabilizing factor, if one group of basic rectifier cabinet fault, can only move by half, if during one group of basic current cabinet fault, appointing needs full-load run, and every group of basic rectifier cabinet must be selected by total current, should consider current stabilizing factor during design;
Below only be a specific embodiment described in this specification, allly conceive equivalence or the simple change that described structure, feature and material are done according to the utility model patent, be included in the protection range of the utility model patent.
Claims (4)
1. 12 pulsating wave rectification comprises rectifier transformer and two identical first basic rectifier cabinets, the second basic rectifier cabinet, it is characterized in that:
The primary side of described rectifier transformer connects electrical network, secondary side upper end in the rectifier transformer is connected the first basic rectifier cabinet and the second basic rectifier cabinet respectively with the secondary side lower end, this first basic rectifier cabinet and the second basic rectifier cabinet parallel connection, and be the basic rectifier cabinets power supplies of identical two groups of rated power by rectifier transformer;
The first basic rectifier cabinet comprises circuit breaker, fast acting fuse, three-phase alternating current inlet wire reactor, three-phase bridge rectifier circuit and direct current outlet air core reactor one, described circuit breaker one end is connected with secondary side upper end in the rectifier transformer, the other end links to each other with fast acting fuse, the other end of fast acting fuse links to each other with three-phase alternating current inlet wire reactor, this three-phase alternating current inlet wire reactor links to each other with the corresponding end of three-phase bridge rectifier circuit, the other end of three-phase bridge rectifier circuit is the positive pole of the first basic rectifier cabinet, the positive pole of this first basic rectifier cabinet links to each other with an end of direct current outlet air core reactor one, the outlet of direct current outlet air core reactor one is as the output plus terminal of common DC bus positive pole, the cathode output end of the second basic rectifier cabinet is as the output negative terminal of common DC bus negative pole, the outlet of the direct current outlet air core reactor two in the outlet of the direct current outlet air core reactor one in the first basic rectifier cabinet and the second basic rectifier cabinet links to each other, and the negative pole of the first basic rectifier cabinet links to each other with the negative pole of the second basic rectifier cabinet.
2. 12 pulsating wave rectification according to claim 1, it is characterized in that: all there are three groups of coilings the secondary side upper end in the described rectifier transformer with the secondary side lower end, and each group coiling links to each other with three-phase bridge rectifier circuit with fast acting fuse, three-phase alternating current inlet wire reactor through behind the circuit breaker respectively.
3. 12 pulsating wave rectification according to claim 1 and 2 is characterized in that: described three-phase bridge rectifier circuit is formed by six rectifier diodes.
4. 12 pulsating wave rectification according to claim 1 and 2 is characterized in that: described secondary side upper end differs from 30 degree with secondary side lower end phase entry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320076867 CN203166786U (en) | 2013-02-19 | 2013-02-19 | Twelve-pulse rectification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320076867 CN203166786U (en) | 2013-02-19 | 2013-02-19 | Twelve-pulse rectification device |
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| Publication Number | Publication Date |
|---|---|
| CN203166786U true CN203166786U (en) | 2013-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320076867 Expired - Lifetime CN203166786U (en) | 2013-02-19 | 2013-02-19 | Twelve-pulse rectification device |
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| CN (1) | CN203166786U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103824689A (en) * | 2014-03-06 | 2014-05-28 | 山东达驰电气有限公司 | Rectifier transformer adopting series winding |
-
2013
- 2013-02-19 CN CN 201320076867 patent/CN203166786U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103824689A (en) * | 2014-03-06 | 2014-05-28 | 山东达驰电气有限公司 | Rectifier transformer adopting series winding |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130828 |