CN105471267A - High-voltage high-power DC-DC converter adopting modular structure - Google Patents
High-voltage high-power DC-DC converter adopting modular structure Download PDFInfo
- Publication number
- CN105471267A CN105471267A CN201510915815.7A CN201510915815A CN105471267A CN 105471267 A CN105471267 A CN 105471267A CN 201510915815 A CN201510915815 A CN 201510915815A CN 105471267 A CN105471267 A CN 105471267A
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- CN
- China
- Prior art keywords
- voltage
- transformer
- bridge structure
- current transformer
- modularization
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
-
- 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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a high-voltage high-power DC-DC converter adopting a modular structure. A high-voltage DC passes through a current transformer of a modular half bridge structure and forms a high-frequency inverter loop with a capacitor; the high-frequency inverter loop passes through a high-frequency isolation transformer (T); a secondary side of the transformer is subjected to full-wave rectification through a diode; and finally a low-voltage DC is obtained through filtration of an inductor and the capacitor. Upper and lower insulated gate bipolar transistors (IGBT) of the current transformer of the modular half bridge structure are same in number and are cascaded together, wherein the number is an even number. A circuit is especially suitable for occasions directly getting low-voltage DCs from high-voltage systems.
Description
Technical field
The invention belongs to high-power electric and electronic application, particularly relate to a kind of high-power straight convertor adopting modular construction.
Background technology
Along with the fast development of the industry such as high voltage direct current transmission and urban track traffic, high voltage direct current electric power system obtains increasing application.It is that power equipment is powered that many occasions need directly to get low-voltage DC from high-voltage direct current, traditional method of supplying power to sets up separately voltage AC system, through transformer, rectification, obtains DC low-voltage electricity or adopts jumbo AC transformer to carry out step-down obtaining low-voltage DC supply system.These methods all also exist the problem that power taking is difficult and track laying cost is high, and when particularly HVDC (High Voltage Direct Current) transmission system circuit is longer, power taking will become more difficult.
For solving the difficulty obtaining low-voltage DC from high-voltage direct current, the modularization cascade structure current transformer applied in high-pressure system is incorporated in voltage-dropping type straight convertor by the present invention, this converter does not need to increase independent low-pressure system and transmission line, directly can carry out power taking from high-pressure system, a difficult problem for the direct power taking of high-pressure system.
Summary of the invention
Technical problem of the present invention is to provide a kind of high-power straight convertor adopting modular construction, needs to carry out the occasion that high voltage direct current is transformed to low-voltage DC to solve.
The present invention solves its technical problem, and the technical scheme adopted is:
Adopt the high-power straight convertor of modular construction, high voltage direct current forms inversion circuit, with two component voltage capacitance (C after the current transformer cascade of modularization half-bridge structure through the current transformer of electric capacity in parallel and modularization half-bridge structure
1and C
2) be connected on high voltage direct current side (E), then through high-frequency isolation transformer (T) isolation, in Circuit Fault on Secondary Transformer through diode (D
1and D
2) carry out full-wave rectification after obtain stable low-voltage DC through the filter branch filtering of the formation of inductance (L) and electric capacity (C) again; The even number that the current transformer upper and lower bridge arm switching tube quantity of described modularization half-bridge structure is equal; The current transformer of each modularization half-bridge structure is by two switching tube (S
1and S
2) and an electric capacity C
0form.
The high-power straight convertor of modular construction of the present invention, high voltage direct current is formed inversion circuit through the current transformer of modularization half-bridge structure and electric capacity, again through high-frequency isolation transformer (T), Circuit Fault on Secondary Transformer carries out full-wave rectification through diode, and the filtering eventually passing inductance and electric capacity obtains low-voltage DC.The current transformer upper and lower bridge arm switching tube quantity of modularization half-bridge structure is equal (implementing in illustration is 4), and level is linked togather respectively.The voltage stress that each switching tube bears is little, can select low tension switch pipe.This circuit is particularly suitable for the occasion directly obtaining low-voltage DC from high-pressure system.
Adopting apparatus and method of the present invention, solving by adopting the high-power straight convertor of modular construction the difficult problem that high-voltage direct current directly obtains low-voltage DC, is the innovation and the Important Action that improve DC power-supply system technical performance and economic performance.
Operation principle of the present invention is: high voltage direct current forms high-frequency inversion loop through the current transformer of modularization half-bridge structure and electric capacity, step-down isolation is carried out again through high-frequency isolation transformer (T), Circuit Fault on Secondary Transformer carries out full-wave rectification through diode (D), and the filtering eventually passing inductance and electric capacity obtains low-voltage DC.By controlling the output voltage size of low-voltage direct, control conducting and the closedown of half-bridge structure converter switches.
Compared with prior art, the invention has the beneficial effects as follows:
One, the present invention can directly access high voltage direct current electric power system, facilitates user's power taking, improves the utilization of direct current system for electric resources.
The current transformer of the half-bridge structure two, in the present invention adopts modular construction, is convenient to manufacture and install.
Three, the present invention also can be used for mesolow needs and carries out directly directly converting occasion.
Accompanying drawing explanation
Fig. 1 is the high-power straight convertor structure chart adopting modular construction.
Embodiment
Below in conjunction with accompanying drawing, converter of the present invention is described in further detail.
Fig. 1 is the high-power straight convertor structure chart adopting modular construction.
The embodiment of the present invention as shown in Figure 1, current transformer (two switching tubes and an electric capacity are formed) level of modularization half-bridge structure is linked togather and is connected on high voltage direct current (E) side with two component voltage capacitance, and current transformer adopts high frequency switching inverter mode of operation; The step-down that high-frequency isolation transformer (T) is carried out between high-frequency and high-voltage interchange and low-voltage alternating-current is isolated; Interchange after step-down is through diode (D
1and D
2) carry out full-wave rectification and obtain DC low-voltage direct current; The road eventually passing the filtering of the formation of inductance (L) and electric capacity (C) is carried out filtering and is obtained stable low-voltage DC.
More than show and describe organization plan of the present invention, general principle and advantage of the present invention; the technical staff of the industry should understand; the present invention is not restricted to the described embodiments; just organization plan of the present invention, control method and general principle that above-described embodiment and specification describe; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in claimed scope of the present invention.
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, with two component voltage capacitance (C after the current transformer cascade of modularization half-bridge structure through the current transformer of electric capacity in parallel and modularization half-bridge structure
1and C
2) be connected on high voltage direct current side (E), then through high-frequency isolation transformer (T) isolation, in Circuit Fault on Secondary Transformer through diode (D
1and D
2) carry out full-wave rectification after obtain stable low-voltage DC through the filter branch filtering of the formation of inductance (L) and electric capacity (C) again; 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 (S
1and S
2) and an electric capacity C
0form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510915815.7A CN105471267A (en) | 2015-12-10 | 2015-12-10 | High-voltage high-power DC-DC converter adopting modular structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510915815.7A CN105471267A (en) | 2015-12-10 | 2015-12-10 | High-voltage high-power DC-DC converter adopting modular structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105471267A true CN105471267A (en) | 2016-04-06 |
Family
ID=55608674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510915815.7A Pending CN105471267A (en) | 2015-12-10 | 2015-12-10 | High-voltage high-power DC-DC converter adopting modular structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105471267A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5245520A (en) * | 1991-10-10 | 1993-09-14 | Paul Imbertson | Asymmetrical duty cycle power converter |
| CN101795072A (en) * | 2010-03-03 | 2010-08-04 | 中国科学院电工研究所 | High-voltage direct-current direct-current (HVDC-DC) power electronic converter transformer |
| CN103427657A (en) * | 2013-08-01 | 2013-12-04 | 南京南瑞继保电气有限公司 | High-voltage DC-DC conversion device |
| CN103457468A (en) * | 2013-08-01 | 2013-12-18 | 南京南瑞继保电气有限公司 | High voltage direct current-direct current transformer |
| CN104485821A (en) * | 2014-11-18 | 2015-04-01 | 浙江大学 | Direct current transformer device used for power distribution |
| CN205249051U (en) * | 2015-12-10 | 2016-05-18 | 西华大学 | Adopt modular structure's blunt straight converter of high -pressure great merit |
-
2015
- 2015-12-10 CN CN201510915815.7A patent/CN105471267A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5245520A (en) * | 1991-10-10 | 1993-09-14 | Paul Imbertson | Asymmetrical duty cycle power converter |
| CN101795072A (en) * | 2010-03-03 | 2010-08-04 | 中国科学院电工研究所 | High-voltage direct-current direct-current (HVDC-DC) power electronic converter transformer |
| CN103427657A (en) * | 2013-08-01 | 2013-12-04 | 南京南瑞继保电气有限公司 | High-voltage DC-DC conversion device |
| CN103457468A (en) * | 2013-08-01 | 2013-12-18 | 南京南瑞继保电气有限公司 | High voltage direct current-direct current transformer |
| CN104485821A (en) * | 2014-11-18 | 2015-04-01 | 浙江大学 | Direct current transformer device used for power distribution |
| CN205249051U (en) * | 2015-12-10 | 2016-05-18 | 西华大学 | Adopt modular structure's blunt straight converter of high -pressure great merit |
Non-Patent Citations (1)
| Title |
|---|
| 邢岩 等: "《高频功率开关变换技术》", 31 May 2005 * |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160406 |