CN117595679A - Parallel operation feedback frequency converter topological structure - Google Patents
Parallel operation feedback frequency converter topological structure Download PDFInfo
- Publication number
- CN117595679A CN117595679A CN202311472829.7A CN202311472829A CN117595679A CN 117595679 A CN117595679 A CN 117595679A CN 202311472829 A CN202311472829 A CN 202311472829A CN 117595679 A CN117595679 A CN 117595679A
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- China
- Prior art keywords
- frequency converter
- phase diode
- feedback frequency
- unit
- parallel operation
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- 239000003990 capacitor Substances 0.000 claims abstract description 18
- 230000001172 regenerating effect Effects 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
Abstract
The invention relates to the technical field of regenerated electric energy control and discloses a parallel operation feedback frequency converter topological structure which comprises an inversion unit and a rectification unit, wherein an input side of the inversion unit and an output side of the rectification unit are connected in parallel to an alternating current power supply, and two ends of a direct current side of the rectification unit are respectively connected with the direct current side of the inversion unit through a fourth single-phase diode and a fifth single-phase diode. The invention effectively solves the defects that the AFE feedback frequency converter has large volume and high cost and is not suitable for underground use in coal mines; the parallel operation feedback frequency converter adopts a current feedback mode, and the power supply side of the rectifying unit only needs to be provided with one input filter reactor, so that the input reactor, the boost reactor and the alternating current filter capacitor of the original PIU part can be replaced, the volume is reduced by 2/3, the cost is saved by 3/4, the defects that the feedback frequency converter is large in volume and the underground coal mine is not well placed are effectively overcome, and meanwhile, the material cost is saved.
Description
Technical Field
The invention relates to the technical field of regenerated electric energy control, in particular to a parallel operation feedback frequency converter topological structure.
Background
The rapid development of electrification has led to increasing demands on the capacity, performance and reliability of power supply systems, and has also driven the continuous intensive research of power electronics. Four-quadrant feedback frequency converter is recognized as one of important directions of current power conversion technology development in the field of electric energy regeneration. When the AFE feedback control mode is commonly used in the market at present, an LCL filter circuit needs to be configured, and particularly when the AFE feedback control mode is used in a coal mine, the LCL filter circuit is limited by an explosion-proof shell, and the PIU unit has the defects of large volume, high cost, increased equipment volume, poor transportation, short placement position and the like. In addition, the inverter in the AFE mode only has IGBT units and cannot operate independently, and the rectifiers must be configured with the same power level to operate.
Disclosure of Invention
Accordingly, the present invention is directed to a parallel feedback converter topology that solves the above-mentioned problems of the related art.
In order to achieve the above object, the following technical scheme is adopted:
the parallel operation feedback frequency converter topological structure comprises an inversion unit and a rectification unit, wherein an input side of the inversion unit and an output side of the rectification unit are connected in parallel to an alternating current power supply, and two ends of a direct current side of the rectification unit are connected with the direct current side of the inversion unit through a fourth single-phase diode and a fifth single-phase diode respectively.
As a further improvement of the invention, the inversion unit is an independent two-phase limit frequency converter, when the motor is in a regenerative braking state, the direct-current voltage of the inversion unit is increased, the direct-current voltage is transmitted to the rectification unit through the fourth single-phase diode and the fifth single-phase diode in a single phase mode, and the rectification unit controls the conduction of the 6 paths of second IGBTs through the DSP chip according to the increase of the direct-current voltage and feeds the direct-current voltage back to the power grid.
As a further improvement of the invention, the inverter unit comprises a first single-phase diode, a second single-phase diode, a third single-phase diode, a first capacitor, a second capacitor and a first IGBT which are arranged in parallel, wherein the first single-phase diode, the second single-phase diode and the third single-phase diode are all arranged in series.
As a further improvement of the present invention, the rectifying unit includes a second IGBT, a third capacitor, and a fourth capacitor arranged in parallel.
As a further improvement of the invention, the two ends of the fourth capacitor are respectively connected with a fourth single-phase diode and a fifth single-phase diode.
As a further improvement of the present invention, an input reactor is connected to the input side of the inverter unit.
As a further improvement of the invention, the output side of the rectifying unit is connected with an input feedback reactor.
The beneficial effects of the invention are as follows:
1. the invention effectively solves the defects that the AFE feedback frequency converter has large volume and high cost and is not suitable for underground use in coal mines; the parallel operation feedback frequency converter adopts a current feedback mode, and the power supply side of the rectifying unit only needs to be provided with one input filter reactor to replace the input reactor, the boosting reactor and the alternating current filter capacitor of the original PIU part, so that the volume is reduced by 2/3, and the cost is saved by 3/4. The defect that the feedback frequency converter is large in size and not well placed underground in a coal mine is effectively overcome, and meanwhile, the material cost is saved.
2. In the existing AFE feedback mode, the power configuration of the rectifying part and the inverting part must be identical, and only the feedback quantity must be provided with the rectifying unit with the same power. The parallel feedback frequency converter rectifying unit and the inverter unit operate in parallel, so that independent use of the inverter and the rectifier is realized, the power configuration of the rectifier can be large or small, the low-power rectifying unit can be configured according to actual requirements, and the material cost is greatly reduced.
3. The rectifying unit part is independently configured, so that the rectifying unit can be used for designing the power according to the actual working condition on site, and the device is convenient and flexible, small in size and low in cost, and is more suitable for underground coal mine environments.
4. According to the invention, the rectifying unit input filter unit is only provided with one input reactor, so that the effect of feeding back the power grid can be achieved, the material cost is saved, and the space is saved.
5. Aiming at the use of coal mine explosion-proof products, the invention effectively solves the defects of large volume, large heating value and large occupied space of equipment of the feedback frequency converter, and has obvious market advantages.
6. According to the parallel operation feedback frequency converter, the topological structure is changed, the frequency converter PIU unit adopts a single input filter reactor and one input filter reactor of the AFE feedback frequency converter, the voltage boosting reactor is one, compared with the filter capacitor, the volume is reduced by 1/5, and the cost is reduced by 1/6.
7. Compared with AFE feedback frequency conversion, the parallel operation feedback frequency converter can work independently, is not influenced by the rectifying part, and can reduce the rectifying power to 3/4 of the original power, thereby ensuring normal use of the equipment and reducing the product cost.
8. The parallel operation feedback frequency converter feedback performance of the invention is verified by national coal mine safety center, and the anti-explosion certificate and the coal safety certificate are obtained, so that the feedback frequency converter is reduced in volume, the cost of the frequency converter with the same specification is reduced by 1/6, and the invention is more suitable for market demands.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 is a schematic structural view of the present invention.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
As shown in fig. 1, the parallel operation feedback frequency converter topology structure comprises an inversion unit 1 and a rectification unit 2, wherein an input side of the inversion unit 1 and an output side of the rectification unit 2 are connected in parallel to an alternating current power supply, and two ends of a direct current side of the rectification unit 2 are respectively connected with the direct current side of the inversion unit 1 through a fourth single-phase diode D4 and a fifth single-phase diode D5.
The inverter unit 1 is an independent two-phase limit frequency converter, when the motor is in a regenerative braking state, the direct current voltage of the inverter unit 1 rises, the direct current voltage is single-phase transmitted to the rectifier unit 2 through the fourth single-phase diode D4 and the fifth single-phase diode D5, and the rectifier unit 2 controls 6 paths of second IGBTs 4 to be conducted through the DSP chip according to the rising of the direct current voltage and feeds back to a power grid.
The inverter unit 1 comprises a first single-phase diode D1, a second single-phase diode D2, a third single-phase diode D3, a first capacitor C1, a second capacitor C2 and a first IGBT3 which are arranged in parallel, wherein the first single-phase diode D1, the second single-phase diode D2 and the third single-phase diode D3 are all connected in series and are provided with two.
The rectifying unit 2 includes a second IGBT4, a third capacitor C3, and a fourth capacitor C4 arranged in parallel.
And two ends of the fourth capacitor C4 are respectively connected with a fourth single-phase diode D4 and a fifth single-phase diode D5.
An input reactor T2 is connected to the input side of the inverter unit 1.
An input feedback reactor T1 is connected to the output side of the rectifying unit 2.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, component disassembly, or combination thereof, etc. that falls within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (7)
1. A parallel operation feedback frequency converter topological structure is characterized in that: the power supply is connected with the input side of the inversion unit and the output side of the rectification unit in parallel, and two ends of the direct current side of the rectification unit are respectively connected with the direct current side of the inversion unit through a fourth single-phase diode and a fifth single-phase diode.
2. The parallel operation feedback frequency converter topology according to claim 1, wherein: the inversion unit is an independent two-phase limit frequency converter, when the motor is in a regenerative braking state, the direct-current voltage of the inversion unit rises, the direct-current voltage is transmitted to the rectification unit through the fourth single-phase diode and the fifth single-phase diode in a single phase mode, and the rectification unit controls 6 paths of second IGBTs to be conducted through the DSP chip according to the rising of the direct-current voltage and feeds back to a power grid.
3. The parallel operation feedback frequency converter topology according to claim 2, wherein: the inversion unit comprises a first single-phase diode, a second single-phase diode, a third single-phase diode, a first capacitor, a second capacitor and a first IGBT which are arranged in parallel, wherein the first single-phase diode, the second single-phase diode and the third single-phase diode are all connected in series and are two.
4. A parallel operation feedback frequency converter topology according to claim 3, characterized in that: the rectification unit comprises a second IGBT, a third capacitor and a fourth capacitor which are arranged in parallel.
5. The parallel operation feedback frequency converter topology of claim 4, wherein: and two ends of the fourth capacitor are respectively connected with a fourth single-phase diode and a fifth single-phase diode.
6. The parallel operation feedback frequency converter topology of claim 5, wherein: an input reactor is connected to the input side of the inversion unit.
7. The parallel operation feedback frequency converter topology of claim 6, wherein: and the output side of the rectifying unit is connected with an input feedback reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311472829.7A CN117595679A (en) | 2023-11-07 | 2023-11-07 | Parallel operation feedback frequency converter topological structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311472829.7A CN117595679A (en) | 2023-11-07 | 2023-11-07 | Parallel operation feedback frequency converter topological structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117595679A true CN117595679A (en) | 2024-02-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311472829.7A Pending CN117595679A (en) | 2023-11-07 | 2023-11-07 | Parallel operation feedback frequency converter topological structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117595679A (en) |
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2023
- 2023-11-07 CN CN202311472829.7A patent/CN117595679A/en active Pending
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