CN205249051U - High-voltage high-power direct-current-direct-current converter adopting modular structure - Google Patents
High-voltage high-power direct-current-direct-current converter adopting modular structure Download PDFInfo
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- CN205249051U CN205249051U CN201521027374.9U CN201521027374U CN205249051U CN 205249051 U CN205249051 U CN 205249051U CN 201521027374 U CN201521027374 U CN 201521027374U CN 205249051 U CN205249051 U CN 205249051U
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- 238000002955 isolation Methods 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 239000003990 capacitor Substances 0.000 claims abstract description 4
- 238000010276 construction Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 3
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- 230000005611 electricity Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model discloses an adopt modular structure's high-power straight converter of high pressure. The high-voltage direct current forms a high-frequency inversion loop through a current transformer and a capacitor of a modular half-bridge structure, then passes through a high-frequency isolation transformer (T), the secondary side of the transformer performs full-wave rectification through a diode, and finally the low-voltage direct current is obtained through filtering of an inductor and the capacitor. The number of the switching tubes (IGBTs) of the upper bridge arm and the lower bridge arm of the current transformer of the modularized half-bridge structure is equal and even, and the switching tubes are respectively cascaded together. The circuit is particularly suitable for occasions of directly obtaining low-voltage direct current from a high-voltage system.
Description
Technical field
The utility model belongs to high-power electric and electronic application, relates in particular to a kind of modular construction that adoptsHigh-power straight convertor.
Background technology
Along with the fast development of the industry such as D.C. high voltage transmission and urban track traffic, HVDC electric power systemObtain increasing application. Many occasions need directly to get low-voltage DC for electricity from high-voltage direct currentThe power supply of power equipment, traditional method of supplying power to is to set up separately voltage AC system, through transformer, rectification,Obtain DC low-voltage electricity or adopt jumbo AC transformer to carry out step-down obtaining low-voltage DC supply systemSystem. These methods all exist power taking difficulty and track laying cost high problem, particularly high-voltage dc transmissionIn the situation that electric system circuit is grown, it is more difficult that power taking will become.
For solving the difficulty that obtains low-voltage DC from high-voltage direct current, the utility model is by high-pressure systemThe modularization cascade structure current transformer of application is incorporated in voltage-dropping type straight convertor, and this converter does not need to increaseAdd independent low-pressure system and transmission line of electricity, can directly carry out power taking from high-pressure system, high-pressure system is directA difficult problem for power taking.
Utility model content
Technical problem of the present utility model is to provide a kind of high-power of modular construction that adopts straightConverter, to solve the occasion that need to carry out HVDC and be transformed to low-voltage DC.
The utility model solves its technical problem, and the technical scheme adopting is:
Adopt the high-power straight convertor of modular construction, high voltage direct current through electric capacity in parallel andThe current transformer of modularization half-bridge structure forms inversion circuit, after the current transformer cascade of modularization half-bridge structure and twoComponent piezoelectricity holds (C1And C2) be connected on HVDC side (E), then pass through high-frequency isolation transformer (T) isolation,At Circuit Fault on Secondary Transformer process diode (D1And D2) carry out passing through again inductance (L) and electricity after full-wave rectificationThe filter branch filtering of holding the formation of (C) obtains stable low-voltage DC; Described modularization half-bridge structureThe equal even number of current transformer upper and lower bridge arm switching tube quantity; The current transformer of each modularization half-bridge structure is by twoSwitching tube (S1And S2) and a capacitor C0Form.
The high-power straight convertor of the utility model modular construction, by high voltage direct current process moduleCurrent transformer and the electric capacity of changing half-bridge structure form inversion circuit, then pass through high-frequency isolation transformer (T), transformationDevice secondary side carries out full-wave rectification through diode, obtains low-voltage direct finally by the filtering of crossing inductance and electric capacityElectricity. The current transformer upper and lower bridge arm switching tube quantity of modularization half-bridge structure equates (implementing in illustration is 4),Level is linked togather respectively. The voltage stress that each switching tube bears is little, can select low tension switch pipe. This circuitBe particularly suitable for directly obtaining from high-pressure system the occasion of low-voltage DC.
Adopt apparatus and method of the present utility model, by adopting straight change of high-power of modular constructionParallel operation solution high-voltage direct current directly obtains a difficult problem for low-voltage DC, is to improve DC power-supply system technologyThe innovation of performance and economic performance and Important Action.
Operation principle of the present utility model is: high voltage direct current is through current transformer and the electricity of modularization half-bridge structureHold and form high-frequency inversion loop, then pass through high-frequency isolation transformer (T) and carry out step-down isolation, transformer secondarySide is carried out full-wave rectification through diode (D), obtains low-voltage DC finally by the filtering of crossing inductance and electric capacity.By controlling the output voltage size of low-voltage direct, control conducting and the pass of half-bridge structure converter switchesClose.
Compared with prior art, the beneficial effects of the utility model are:
One, the utility model can directly access high voltage direct current electric power system, facilitates user's power taking, improvesStraight-flow system is for the utilization of electric resources.
Two, the current transformer of the half-bridge structure in the utility model adopts modular construction, is convenient to manufacture and install.
Three, the utility model also can be used for mesolow and need to carry out straight straight conversion occasion.
Brief description of the drawings
Fig. 1 is the high-power straight convertor structure chart that adopts modular construction.
Detailed description of the invention
Below in conjunction with accompanying drawing, converter of the present utility model is described in further detail.
Fig. 1 is the high-power straight convertor structure chart that adopts modular construction.
The utility model embodiment as shown in Figure 1, the current transformer of modularization half-bridge structure (two switching tubes andElectric capacity forms) level is linked togather with two component piezoelectricity and holds and be connected on HVDC (E) side, and current transformer is adoptedUse high frequency switching inverter mode of operation; High-frequency isolation transformer (T) is carried out high-frequency and high-voltage and is exchanged and low pressure friendshipStep-down isolation between stream; Interchange after step-down is through diode (D1And D2) carry out full-wave rectification and obtain directlyStream low-voltage DC; Carrying out filtering finally by the road of filtering of crossing inductance (L) and the formation of electric capacity (C) obtainsTo stable low-voltage DC.
More than show and described organization plan of the present utility model, general principle and of the present utility model excellentPoint, the technical staff of the industry should understand, and the utility model is not restricted to the described embodiments, above-mentioned realityWhat execute example and description description is organization plan of the present utility model, control method and general principle, notDepart under the prerequisite of the utility model spirit and scope, the utility model also has various changes and modifications, thisA little changes and improvements all fall in claimed scope of the present utility model.
Claims (1)
1. one kind adopts the high-power straight convertor of modular construction, it is characterized in that, high voltage direct current forms inversion circuit through the current transformer of electric capacity in parallel and modularization half-bridge structure, after the current transformer cascade of modularization half-bridge structure, holds (C with two component piezoelectricity1、C2) be connected on HVDC side (E), then pass through high-frequency isolation transformer (T) isolation, at Circuit Fault on Secondary Transformer process diode (D1、D2) the filter branch filtering of carrying out passing through again after full-wave rectification the formation of inductance (L) and electric capacity (C) obtains stable low-voltage DC; The current transformer upper and lower bridge arm switching tube quantity of described modularization half-bridge structure is equal even number; The current transformer of each modularization half-bridge structure is by two switching tube (S1、S2) and a capacitor C0Form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521027374.9U CN205249051U (en) | 2015-12-10 | 2015-12-10 | High-voltage high-power direct-current-direct-current converter adopting modular structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521027374.9U CN205249051U (en) | 2015-12-10 | 2015-12-10 | High-voltage high-power direct-current-direct-current converter adopting modular structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205249051U true CN205249051U (en) | 2016-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521027374.9U Expired - Fee Related CN205249051U (en) | 2015-12-10 | 2015-12-10 | High-voltage high-power direct-current-direct-current converter adopting modular structure |
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| Country | Link |
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| CN (1) | CN205249051U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471267A (en) * | 2015-12-10 | 2016-04-06 | 西华大学 | High-voltage high-power direct-current-direct-current converter adopting modular structure |
-
2015
- 2015-12-10 CN CN201521027374.9U patent/CN205249051U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471267A (en) * | 2015-12-10 | 2016-04-06 | 西华大学 | High-voltage high-power direct-current-direct-current converter adopting modular structure |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160518 Termination date: 20181210 |