CN204030621U - Form the light DC power transmission equipment of filter circuit with transformer secondary winding - Google Patents
Form the light DC power transmission equipment of filter circuit with transformer secondary winding Download PDFInfo
- Publication number
- CN204030621U CN204030621U CN201420399432.XU CN201420399432U CN204030621U CN 204030621 U CN204030621 U CN 204030621U CN 201420399432 U CN201420399432 U CN 201420399432U CN 204030621 U CN204030621 U CN 204030621U
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- China
- Prior art keywords
- filter circuit
- power cell
- transformer
- power
- transmission equipment
- Prior art date
- 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.)
- Expired - Lifetime
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 25
- 238000004804 winding Methods 0.000 title claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims abstract description 12
- 230000001681 protective effect Effects 0.000 claims abstract description 6
- 230000005611 electricity Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 9
- 239000004020 conductor Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Inverter Devices (AREA)
Abstract
The light DC power transmission equipment that forms filter circuit with transformer secondary winding, rectification side, inversion side connect by direct current transportation cable, and described inversion side power cell utilizes the reactance of transformer and LC filter circuit to be directly connected to form LCL filter circuit.Described rectification side, inversion side power cell DC bus capacitor device parallel connection short circuit protective device; by the series connection point of two series IGBT electronic switch devices and the direct voltage of DC capacitor negative pole stable output; the most all DC side outputs cascade being connected with direct current transportation cable; form required direct voltage, transmit electricity to power cell.Utilize the reactance of transformer and LC filter circuit to be directly connected to form LCL filter circuit at inversion side power cell outlet side; omit a reactor; and the novel protected circuit of power cell; make light DC power transmission equipment there is very high stability, and provide rational hardware configuration for the new type of control method of direct current transportation equipment.
Description
Technical field
The utility model relates to a kind of for being applied to the light DC power transmission equipment that adopts multiple secondary winding transformer.
Background technology
Country's Devoting Major Efforts To Developing and utilize renewable and clean energy resource, regenerative resource General Decentralized is strong and away from load center, after connecting system, also can affect the stable case of whole electrical network, the HVDC Light HVDC Light of modularized design, as a kind of novel HVDC Transmission Technology, gathers around and has wide practical use.
HVDC Light technology is a kind of HVDC Transmission Technology based on turn-offing power electronic device voltage source converter (VSC) and pulse modulation technology.The feature of the HVDC Light based on VSC technology is mainly manifested in the following aspects:
(1) VSC converter is passive inverter, to not requirement of receiving-end system.
(2) harmonic wave that VSC converter produces greatly weakens, to need to also greatly reducing of reactive power.
(3) there will not be commutation failure fault.
(4) modularized design shortens dramatically design, production, the installment and debugging cycle of HVDC Light.
(5) can realize unattended or few man on duty.
(6) controller can be realized automatically and regulating according to the needs of AC system, thereby reduces investment and the operation and maintenance cost thereof of communication.
Therefore,, as a novel technology of transmission of electricity, HVDC Light has demonstrated very large superiority with the feature of himself in application aspect.Combine with new control algolithm, HVDC Light technology is reducing transmission line voltage-drop and voltage flicker, is further improving aspect the quality of power supply and can obtain better performance; Compared with existing transmission line of alternation current, can significantly reduce line loss.
At present, adopt the light DC power transmission equipment of above-mentioned control method, in the structure of inversion side output LCL filter apparatus for to be formed by two reactors and a filter.And the protective circuit of the power cell of light DC power transmission equipment also needs further improvement.
Summary of the invention
The purpose of this utility model is to provide a kind of light DC power transmission equipment; adopt many windings phase shifting transformer as input transformer; utilize the reactance of transformer and LC filter circuit to be directly connected to form LCL filter circuit at inversion side power cell outlet side; omit a reactor; and power cell has designed a novel protective circuit; make light DC power transmission equipment there is very high stability, and provide rational hardware configuration for the new type of control method of direct current transportation equipment.
For achieving the above object, the utility model is achieved through the following technical solutions:
Form the light DC power transmission equipment of filter circuit with transformer secondary winding, described light DC power transmission equipment rectification side, inversion side adopt many level of power unit cascade structure, rectification side, inversion side include 12 power cells, and power cell basic structure is AC-DC-AC three phase rectifier, inverter circuit; The secondary of input side phase shifting transformer has 12 groups of 0.5kV windings, each power cell is connected to one of them secondary winding of phase shifting transformer by LC filter circuit, the DC voltage control of each power cell is at 850V, and it is 850*12=10200V that the DC side of all power cells makes total DC side output voltage by head and the tail connected mode; Rectification side, inversion side connect by direct current transportation cable, it is characterized in that, described inversion side power cell utilizes the reactance of transformer and LC filter circuit to be directly connected to form LCL filter circuit.
Described rectification side, inversion side power cell DC bus capacitor device parallel connection short circuit protective device; described short-circuit protection is made up of the IGBT electronic switch device of two series connection; by the series connection point of two series IGBT electronic switch devices and the direct voltage of DC capacitor negative pole stable output; the most all DC side outputs cascade being connected with direct current transportation cable; form required direct voltage, transmit electricity to power cell.
Compared with prior art, the beneficial effects of the utility model are:
Adopt many windings phase shifting transformer as input transformer; utilize the reactance of transformer and LC filter circuit to be directly connected to form LCL filter circuit at inversion side power cell outlet side; omit a reactor; and power cell has designed a novel protective circuit; make light DC power transmission equipment there is very high stability, and provide rational hardware configuration for the new type of control method of direct current transportation equipment.
Brief description of the drawings
Fig. 1 is light DC power transmission equipment structure chart.
Fig. 2 is the structure chart of power cell.
Fig. 3 is the concrete structure figure of light DC power transmission equipment.
Embodiment
See Fig. 1, Fig. 2, form the light DC power transmission equipment of LCL filter circuit with transformer secondary winding, described light DC power transmission equipment rectification side, inversion side adopt many level of power unit cascade structure, rectification side, inversion side include 12 power cells, and power cell basic structure is AC-DC-AC three phase rectifier, inverter circuit; The secondary of input side phase shifting transformer has 12 groups of 0.5kV windings, each power cell is connected to one of them secondary winding of phase shifting transformer by LC filter circuit, the DC voltage control of each power cell is at 850V, and it is 850*12=10200V that the DC side of all power cells makes total DC side output voltage by head and the tail connected mode; Rectification side, inversion side connect by direct current transportation cable.
The inversion side unit of described light DC power transmission equipment utilizes the leakage reactance of transformer secondary winding and LC filter circuit to form LCL filtering, has omitted a reactor compared with traditional LCL filter circuit.Secondary winding of the present utility model reactance is directly connected with LC filtering, utilizes the leakage reactance of secondary winding to omit a reactor.Synchronous coordinate control inverter based on abc/dq rotation transformation has very high steady-state behaviour simultaneously, and CONTROLLER DESIGN has suppressed the three-phase current unbalance that each cell current ring proportionality coefficient reduces to cause effectively, obtains high-quality output current wave.
See Fig. 3, rectification side, the former edge joint of phase shifting transformer enters high-voltage alternating system, forms low-voltage AC send into power cell at secondary.The three-phase controlled rectifier circuit rectification that power cell forms for IGBT, form direct voltage at DC bus capacitor C two ends, electronic switch device IGBT1 and the IGBT2 of two series connection in parallel of DC bus capacitor device C output, by the series connection point of electronic switch device IGBT1, IGBT2 and the direct voltage of DC capacitor C negative pole stable output of two series connection.When normal work, IGBT1 is in opening state, and IGBT2 is in off state.In the time that short trouble appears in DC side, electronic switch device IGBT1 turn-offs, and plays the effect of error protection.DC bus capacitor C is DC side energy-storage travelling wave tube, impulse current that available buffer brachium pontis cut-offs, reduces the voltage harmonic of DC side, and for power cell provides voltage support, the most all DC side outputs cascade up, form high-voltage dc voltage output.
Inversion side, direct voltage is added in capacitor two ends by the series connection point of electronic switch device IGBT3, IGBT4, is then reverse into alternating voltage output through the controlled inverter circuit of three-phase being made up of IGBT.When normal work, IGBT3 is in opening state, and IGBT4 is in off state.In the time that short trouble appears in DC side, IGBT3 turn-offs, and plays the effect of error protection.Direct current input side is cascaded up and is connected with direct current transportation cable, adopt electric capacity and electric resistance partial pressure to make each power cell bear the direct voltage of decile, power cell adopts PWM pulse modulation technology by direct voltage inversion output AC electricity, again the ac output end of each power cell is accessed to transformer secondary through LC filter circuit, by the required alternating current of transformer output user of different model.DC bus capacitor is its DC side energy-storage travelling wave tube, impulse current that available buffer brachium pontis cut-offs, reduces the voltage harmonic of DC side, and provides voltage support for power cell.
Described direct current transportation cable is squeezed into insulating barrier by three layers of conductor shields, insulating barrier, insulation screen, and middle conductor is aluminium list core conductor.The feature such as there is high strength, environmental protection and conveniently bury.
Claims (2)
1. form the light DC power transmission equipment of filter circuit with transformer secondary winding, described light DC power transmission equipment rectification side, inversion side adopt many level of power unit cascade structure, rectification side, inversion side include 12 power cells, and power cell basic structure is AC-DC-AC three phase rectifier, inverter circuit; The secondary of input side phase shifting transformer has 12 groups of 0.5kV windings, each power cell is connected to one of them secondary winding of phase shifting transformer by LC filter circuit, the DC voltage control of each power cell is at 850V, and it is 10200V that the DC side of all power cells makes total DC side output voltage by head and the tail connected mode; Rectification side, inversion side connect by direct current transportation cable, it is characterized in that, described inversion side power cell utilizes the reactance of transformer and LC filter circuit to be directly connected to form LCL filter circuit.
2. the light DC power transmission equipment that forms filter circuit with transformer secondary winding according to claim 1; it is characterized in that; described rectification side, inversion side power cell DC bus capacitor device parallel connection short circuit protective device; described short-circuit protection is made up of the IGBT electronic switch device of two series connection; by the series connection point of two series IGBT electronic switch devices and the direct voltage of DC capacitor negative pole stable output; the most all DC side outputs cascade being connected with direct current transportation cable; form required direct voltage, transmit electricity to power cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420399432.XU CN204030621U (en) | 2014-07-18 | 2014-07-18 | Form the light DC power transmission equipment of filter circuit with transformer secondary winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420399432.XU CN204030621U (en) | 2014-07-18 | 2014-07-18 | Form the light DC power transmission equipment of filter circuit with transformer secondary winding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204030621U true CN204030621U (en) | 2014-12-17 |
Family
ID=52070449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420399432.XU Expired - Lifetime CN204030621U (en) | 2014-07-18 | 2014-07-18 | Form the light DC power transmission equipment of filter circuit with transformer secondary winding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204030621U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374420A (en) * | 2016-11-16 | 2017-02-01 | 许继集团有限公司 | DC micro grid converter |
-
2014
- 2014-07-18 CN CN201420399432.XU patent/CN204030621U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374420A (en) * | 2016-11-16 | 2017-02-01 | 许继集团有限公司 | DC micro grid converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 550002 No. 251 Jiefang Road, Nanming District, Guiyang City, Guizhou Province Co-patentee after: MONTNETS RONGXIN TECHNOLOGY GROUP CO.,LTD. Patentee after: ELECTRIC POWER RESEARCH INSTITUTE, GUIZHOU POWER GRID Co.,Ltd. Co-patentee after: LIAONING RONGXIN ZHONGTENG TECHNOLOGY Co.,Ltd. Address before: 550002 No. 251 Jiefang Road, Nanming District, Guiyang City, Guizhou Province Co-patentee before: RONGXIN POWER ELECTRONIC Co.,Ltd. Patentee before: Guizhou Electric Power Test Research Institute Co-patentee before: LIAONING RONGXIN ZHONGTENG TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190203 Address after: 550002 Jiefang Road, Nanming District, Guiyang, Guizhou Province, No. 32 Co-patentee after: LIAONING RONGXIN INDUSTRIAL ELECTRIC POWER TECHNOLOGY CO.,LTD. Patentee after: ELECTRIC POWER RESEARCH INSTITUTE, GUIZHOU POWER GRID Co.,Ltd. Address before: 550002 No. 251 Jiefang Road, Nanming District, Guiyang City, Guizhou Province Co-patentee before: MONTNETS RONGXIN TECHNOLOGY GROUP CO.,LTD. Patentee before: ELECTRIC POWER RESEARCH INSTITUTE, GUIZHOU POWER GRID Co.,Ltd. Co-patentee before: LIAONING RONGXIN ZHONGTENG TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220719 Address after: No.17 Binhe Road, Nanming District, Guiyang City, Guizhou Province Patentee after: Guizhou Power Grid Co.,Ltd. Address before: 550002 Jiefang Road, Nanming District, Guiyang, Guizhou Province, No. 32 Patentee before: ELECTRIC POWER RESEARCH INSTITUTE, GUIZHOU POWER GRID Co.,Ltd. Patentee before: LIAONING RONGXIN INDUSTRIAL ELECTRIC POWER TECHNOLOGY CO.,LTD. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141217 |