CN202160116U - Novel power unit used in light DC transmission equipment - Google Patents
Novel power unit used in light DC transmission equipment Download PDFInfo
- Publication number
- CN202160116U CN202160116U CN2011202120086U CN201120212008U CN202160116U CN 202160116 U CN202160116 U CN 202160116U CN 2011202120086 U CN2011202120086 U CN 2011202120086U CN 201120212008 U CN201120212008 U CN 201120212008U CN 202160116 U CN202160116 U CN 202160116U
- Authority
- CN
- China
- Prior art keywords
- power cell
- power unit
- side power
- voltage
- igbt
- 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
Links
Images
Landscapes
- Rectifiers (AREA)
Abstract
The utility model relates to a novel power unit used in light DC transmission equipment in which electronic type switch devices are integrated. The novel power unit used in the light DC transmission equipment is characterized in that the output end of a DC side capacitor of a rectification side power unit is in parallel connections with two series-wound insulated gate bipolar translator electronic type switch devices of which the midpoints and DC capacitor cathodes are DC voltage output ends, and the DC input end of an inverter side power unit is in parallel connections with two series-wound IGBT electronic type switch devices of which the midpoints and DC capacitor cathodes are DC voltage input ends. The advantages of the utility model are that the DC can be cut-off effectively at the DC output side or input side when a DC transmission fault occurs to thereby improve the safe reliability of the whole system running, and the novel power unit used in the light DC transmission device has the advantages of agile DC voltage level matching, small harmonic wave, etc.
Description
Technical field
The utility model relates to a kind of novel power cell that is used for HVDC Light equipment.
Background technology
The particularity that China's energy resources and power load distribute becomes and develops certainty remote, large capacity transmission.Especially surpass the above long-distance transmission circuit of 600km, adopt more energy-conservation, the consumption reduction of direct current transportation, increase economic efficiency, realize energy resources in larger scope reasonable development, distribute rationally, meet the national conditions of China's " transferring electricity from the west to the east ".
Along with power electronics and computer technology rapid development; The HVDC Light technology is gradually improved; Can compete with extra-high-voltage alternating current with sending on the electrical distance in ability to transmit electricity, and with respect to the ultra-high voltage AC transmission technology, the HVDC Light technology has following advantage:
When 1, carrying equal-wattage, the used wire rod of HVDC Light is merely 2/3～1/2 of ac transmission;
2, in cable transmission line, HVDC Light does not have capacitance current to produce, and there is capacitance current in the high-voltage AC transmission circuit, causes loss;
3, HVDC Light uses underground cable more, makes it not have visual influence to surrounding environment, and the magnetic field that does not also have cable to produce is it is thus clear that the HVDC Light technology itself is extremely environmental protection.And at some special occasions, must use cable power transmission, when for example high voltage transmission line is through the big city, adopt underground cable; Power transmission line will be used submarine cable during through straits;
4, during direct current transportation, its both sides AC system does not need synchronous operation, and high-voltage AC transmission must synchronous operation;
5, the direct current transportation loss of breaking down is littler than high-voltage AC transmission.In the direct current transportation; Owing to adopt thyristor installation; Circuit power can be rapidly, regulate easily, do not carry short circuit current to the high-voltage alternating system that is short-circuited basically on the DC power transmission line, and the short circuit current of fault top-cross streaming system is the same when not interconnecting.
Therefore, HVDC Light can be applied in the direct current high tension transmission engineering as a kind of economy, flexible, high-quality power transmission mode, with obtaining good transmission of electricity and environmental benefit.In the prior art, HVDC Light also is not used widely at present.
The utility model content
The purpose of the utility model provides a kind of novel power cell that is used for HVDC Light equipment; This novel power cell is integrated electronic switch device; IGBT electronic switch device in two series connection of the output (input) of rectification side (inversion side) power cell parallel connection; Can, direct current transportation turn-off direct current when breaking down effectively at direct current outlet side or input side; With the security reliability of lifting whole system operation, and have advantages such as the direct voltage ratings match is flexible, harmonic wave is little.
For realizing above-mentioned purpose, the utility model is realized through following technical scheme:
A kind of novel power cell that is used for HVDC Light equipment comprises rectification side power cell and inversion side power cell; Rectification side power cell passes through three phase rectifier; With the ac voltage rectifier output dc voltage; The IGBT electronic switch device of two series connection of dc bus capacitor device output parallel connection is pressed through the mid point and the dc capacitor negative pole output galvanic current of two series IGBT electronic switch devices, and the DC side output cascade of all power cells is connected with the direct current transportation cable the most at last; Form the required direct voltage of user, transmit electricity to inversion side power cell;
The IGBT electronic switch device of two series connection of direct-flow input end parallel connection of inversion side power cell; Mid point and dc capacitor negative pole input direct voltage through two series IGBT electronic switch devices; Then the direct current input side is cascaded up and be connected with the direct current transportation cable again; Make each inversion side power cell bear the direct voltage of five equilibrium; Power cell adopts the PWM pulse modulation technology with direct voltage inversion output AC electricity, and the ac output end with each power cell inserts the transformer secondary through the LC filter circuit again, through the required alternating current of transformer output user of different model.
Described rectification side or inversion side power cell adopt three-phase two level or three-phase tri-level topological structure.
The switching device that described rectification side power cell adopts is full-controlled switch device IGBT or diode.
Described inversion side side power cell adopts full-controlled switch device IGBT.
Described direct current transportation cable is squeezed into insulating barrier for three layers by conductor shield, insulating barrier, insulation screen, and middle conductor is an aluminium list core conductor.
Compared with prior art, the beneficial effect of the utility model is:
1) compare with traditional HVDC Light system, adopt the pattern of cascade of power units, need not the IGBT series connection, reliability is higher;
2) adopt the cascade of power units mode, the direct voltage ratings match is flexible, can select the cascade number of power cell according to user's request;
3) the two ends AC system need not filter circuit, and harmonic wave is little;
4) every grade of power cell possesses the electronic type dc switch, can reliable and effective shutoff direct current.
Description of drawings
Fig. 1 is the HVDC Light system construction drawing;
Fig. 2 is HVDC Light system topological figure;
Fig. 3 is the power cell topological diagram of the controlled rectification valve group of three-phase two level;
Fig. 4 is the power cell topological diagram of uncontrollable rectifying valve group;
Fig. 5 is the power cell topological diagram of inversion valve group;
Fig. 6 is a neutral point clamper type three-phase tri-level inversion side power cell topological diagram;
Fig. 7 is a power cell single-phase PWM modulation sketch map;
Fig. 8 is PWM modulation principle and output waveform.
Embodiment
A kind of novel power cell that is used for HVDC Light equipment comprises rectification side power cell and inversion side power cell; The switching device that rectification side power cell adopts can be full-controlled switch device IGBT (Fig. 3) or diode (Fig. 4).Inversion side power cell adopts full-controlled switch device IGBT (Fig. 5, Fig. 6).
See Fig. 3, Fig. 4; The input side of rectification side power cell is for exchanging input; Pass through by the three-phase controlled rectifier circuit rectification that IGBT formed, or adopt the uncontrollable rectification circuit rectification of three-phase that is constituted by a diode, form direct voltage at dc bus capacitor C two ends; The electronic switch device IGBT1 and the IGBT2 of two series connection of dc bus capacitor device C output parallel connection press through the electronic switch device IGBT1 of two series connection, mid point and the dc capacitor C negative pole output galvanic current of IGBT2.During operate as normal, IGBT1 is in opening state, and IGBT2 is in off state.When DC side broke down, electronic switch device IGBT1 turn-offed, and plays the effect of error protection.Dc bus capacitor C is the DC side energy-storage travelling wave tube, the impulse current that the available buffer brachium pontis cut-offs, reduces the voltage harmonic of DC side, and supports for power cell provides voltage.
See Fig. 5, Fig. 6; Inversion side power cell input side is the direct current input; This direct voltage is added in the capacitor two ends through the mid point of electronic switch device IGBT3, IGBT4, then through be reverse into alternating voltage output by the controlled inverter circuit of the three-phase that IGBT formed.IGBT3 is in opening state during operate as normal, and IGBT4 is in off state.When DC side broke down, IGBT3 turn-offed, and plays the effect of error protection.Dc bus capacitor is its DC side energy-storage travelling wave tube, the impulse current that the available buffer brachium pontis cut-offs, reduces the voltage harmonic of DC side, and supports for power cell provides voltage.
See Fig. 1, Fig. 2; The HVDC Light system topological comprises rectification side current conversion station, inversion side current conversion station and direct current transportation cable composition; Wherein rectification side current conversion station is made up of phase shifting transformer, rectification side power cell, and inversion side current conversion station is made up of inversion side power cell, LC filter circuit and transformer.
Rectification side current conversion station, the former edge joint of phase shifting transformer is gone into the high-voltage alternating system, forms low-voltage AC at secondary and sends into power cell.Rectification side power cell adopts the PWM pulse modulation technology to become galvanic current to press AC rectification, and the DC side output of all power cells cascades up the most at last, forms high-voltage dc voltage output.
Inversion side current conversion station; The direct current input side of inversion side power cell cascaded up be connected with the direct current transportation cable again; Make each power cell bear the direct voltage of five equilibrium; Power cell adopts the PWM pulse modulation technology with direct voltage inversion output low-voltage AC, and the ac output end with each power cell inserts the transformer secondary through the LC filter circuit again, through the required alternating current of transformer output user of different model.
Wherein, the power cell number of rectification side current conversion station and inversion side current conversion station is by the required direct voltage grade decision of user.The direct voltage grade is high more, and required power cell number is many more.
The direct current transportation cable is squeezed into insulating barrier for three layers simultaneously by conductor shield, insulating barrier, insulation screen, and middle conductor is generally aluminium list core conductor, and characteristics such as have high strength, environmental protection and conveniently bury are applicable to adverse circumstances such as deep-sea.In addition, it is in light weight that this is merely able to DC transmission line, and through-put power density is big.
Claims (4)
1. novel power cell that is used for HVDC Light equipment; Comprise rectification side power cell and inversion side power cell; It is characterized in that; The IGBT electronic switch device of two series connection of dc bus capacitor device output parallel connection of said rectification side power cell, the mid point of two series IGBT electronic switch devices and dc capacitor negative pole are dc voltage output end;
The IGBT electronic switch device of two series connection of direct-flow input end parallel connection of said inversion side power cell, the mid point of two series IGBT electronic switch devices and dc capacitor negative pole are dc voltage input end.
2. a kind of novel power cell that is used for HVDC Light equipment according to claim 1 is characterized in that, described rectification side or inversion side power cell adopt three-phase two level or three-phase tri-level topological structure.
3. a kind of novel power cell that is used for HVDC Light equipment according to claim 1 is characterized in that, the switching device that described rectification side power cell adopts is full-controlled switch device IGBT or diode.
4. a kind of novel power cell that is used for HVDC Light equipment according to claim 1 is characterized in that, described inversion side side power cell adopts full-controlled switch device IGBT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202120086U CN202160116U (en) | 2011-06-22 | 2011-06-22 | Novel power unit used in light DC transmission equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202120086U CN202160116U (en) | 2011-06-22 | 2011-06-22 | Novel power unit used in light DC transmission equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202160116U true CN202160116U (en) | 2012-03-07 |
Family
ID=45767739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202120086U Expired - Lifetime CN202160116U (en) | 2011-06-22 | 2011-06-22 | Novel power unit used in light DC transmission equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202160116U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113067A (en) * | 2014-06-27 | 2014-10-22 | 许继电气股份有限公司 | Current converting device capable of satisfying energy exchange between two single-phase high-voltage power grids |
| CN104617796A (en) * | 2015-03-06 | 2015-05-13 | 南京南瑞继保电气有限公司 | Modular AC/DC converter and inverter topology |
| CN105811774A (en) * | 2016-01-28 | 2016-07-27 | 北京北交思远科技发展有限公司 | DC/DC converter output control method |
| CN115642783A (en) * | 2022-12-06 | 2023-01-24 | 眉山博雅新材料股份有限公司 | High-frequency power supply and power device for high-frequency power supply |
-
2011
- 2011-06-22 CN CN2011202120086U patent/CN202160116U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113067A (en) * | 2014-06-27 | 2014-10-22 | 许继电气股份有限公司 | Current converting device capable of satisfying energy exchange between two single-phase high-voltage power grids |
| CN104617796A (en) * | 2015-03-06 | 2015-05-13 | 南京南瑞继保电气有限公司 | Modular AC/DC converter and inverter topology |
| CN105811774A (en) * | 2016-01-28 | 2016-07-27 | 北京北交思远科技发展有限公司 | DC/DC converter output control method |
| CN115642783A (en) * | 2022-12-06 | 2023-01-24 | 眉山博雅新材料股份有限公司 | High-frequency power supply and power device for high-frequency power supply |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107204626B (en) | LCC-MMC (lower control center-Modular multilevel converter) staggered hybrid bipolar direct-current power transmission system | |
| CN104022675B (en) | Single-stage two-way isolation AC-DC converter | |
| CN102136725A (en) | Light direct-current transmission system topology | |
| CN105098812A (en) | Three-pole flexible direct current transmission system and method | |
| CN103997033A (en) | High-voltage direct-current transmission system with direct-current fault ride-through capacity | |
| CN104786872B (en) | Cut-through type cophase power supply system for cascaded input-free and output-free transformers | |
| Guarnieri | The alternating evolution of DC power transmission [Historical] | |
| CN104638940A (en) | Modular multi-level power electronic transformer based on cascading | |
| CN202160116U (en) | Novel power unit used in light DC transmission equipment | |
| CN102185480A (en) | Bidirectional isolation direct-current converter | |
| CN101348086B (en) | Pulsating direct current traction electric power supply system | |
| EP4075625A1 (en) | Sea island power transmission system and control method therefor | |
| CN102244382A (en) | Novel power unit for light DC power transmission equipment | |
| CN204030619U (en) | A kind of light DC power transmission equipment high voltage direct current lateral capacitance charging structure | |
| CN204145305U (en) | A kind of novel DC-AC-DC converter being applied to high voltage direct current transmission | |
| Zhou et al. | The development of HVDC transmission system | |
| CN105720822A (en) | Bidirectional DC/DC converter based on serial connection of SiC devices | |
| CN103997054B (en) | A kind of light DC power transmission equipment high voltage direct current lateral capacitance charging method | |
| CN204030618U (en) | A kind of HVDC light system with dc-side short-circuit protection | |
| CN102013819A (en) | Transformer-free DC high-voltage transmission topological structure | |
| CN208690940U (en) | High-voltage direct-current transmission system | |
| CN201994661U (en) | Light direct current (DC) transmission system topology | |
| CN103236693B (en) | Unified electric energy quality controller | |
| CN102420538A (en) | Diode clamping seven-level DC-AC (direct current and alternate current) transformation circuit | |
| CN105450045A (en) | Diagonal bridge sub-module-based modular multi-level converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160902 Address after: 114051, Liaoning, Anshan MTR Eastern Science and technology road, No. 108 Patentee after: Monternet Rongxin Technology Group Limited by Share Ltd Address before: 114051 Anshan high tech Zone, Liaoning province science and technology road, No. 108 Patentee before: Liaoning Rongxin Zhongteng Technology Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180929 Address after: 114051 Anshan City, Liaoning, the East District of science and Technology Road No. 108 Patentee after: Liaoning Rongxin Xingye Electric Power Technology Co., Ltd. Address before: 114051 Anshan City, Liaoning, the East District of science and Technology Road No. 108 Patentee before: Monternet Rongxin Technology Group Limited by Share Ltd |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120307 |