CN102136725A - Light direct-current transmission system topology - Google Patents

Light direct-current transmission system topology Download PDF

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Publication number
CN102136725A
CN102136725A CN2011100496978A CN201110049697A CN102136725A CN 102136725 A CN102136725 A CN 102136725A CN 2011100496978 A CN2011100496978 A CN 2011100496978A CN 201110049697 A CN201110049697 A CN 201110049697A CN 102136725 A CN102136725 A CN 102136725A
Authority
CN
China
Prior art keywords
direct
voltage
power cell
current
transformer
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.)
Pending
Application number
CN2011100496978A
Other languages
Chinese (zh)
Inventor
郭自勇
赵淑玉
杨洋
崔效毓
闫兴江
陈建
王振
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rongxin Power Electronic Co Ltd
Original Assignee
Rongxin Power Electronic Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rongxin Power Electronic Co Ltd filed Critical Rongxin Power Electronic Co Ltd
Priority to CN2011100496978A priority Critical patent/CN102136725A/en
Publication of CN102136725A publication Critical patent/CN102136725A/en
Priority to PCT/CN2012/071434 priority patent/WO2012126306A1/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
    • 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
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/0074—Plural converter units whose inputs are connected in series
    • 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
    • H02M1/0077—Plural converter units whose outputs are connected in series
    • 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
    • Y02E40/10—Flexible AC transmission systems [FACTS]
    • 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]

Abstract

The invention relates to a light direct-current transmission system topology which is composed of a rectifier side convertor station, an inverter side convertor station and a direct-current transmission cable, wherein, the rectifier side convertor station is formed by cascading a phase-shifting transformer and the direct-current output ends of multiple power units; the inverter side convertor station is composed of power units, an LC filter circuit and a transformer; the direct-current input sides of power units are cascaded to be connected with the direct-current transmission cables; the equant direct-current voltage is undertaken by each power unit; a pulse-width modulation (PWM) technique is adopted by the power unit to invert the direct-current voltage to output the low-voltage alternating current; the alternating current output end of each power unit is assessed into the side of the transformer through the LC filter circuit; and the alternating current needed by users is output through the transformer with different models. The light direct-current transmission system topology provided by the invention has the advantages of low cost, flexible direct-current voltage grade matching and small harmonic wave and the like.

Description

A kind of HVDC Light system topological
Technical field
The present invention relates to a kind of novel HVDC Light system topological.
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 only is 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, the magnetic field that does not also have cable to produce, and visible 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, will obtain good transmission of electricity and environmental benefit.In the prior art, HVDC Light also is not used widely at present.
Summary of the invention
The purpose of this invention is to provide a kind of HVDC Light system topological, have advantages such as cost is low, the direct voltage ratings match is flexible, harmonic wave is little.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of HVDC Light system topological is made up of rectification side current conversion station, inversion side current conversion station and direct current transportation cable; Described rectification side current conversion station is made of phase shifting transformer and a plurality of power cell, and 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; 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;
Described inversion side current conversion station is made of power cell, LC filter circuit and transformer, the direct current input side of 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, ac output end with each power cell inserts the transformer secondary through the LC filter circuit again, by the required alternating current of transformer output user of different model.
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, novelty of the present invention and creativeness are embodied in:
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) in middle-size and small-size capacity transmission system, cost is relatively low.
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 rectifying valve group;
Fig. 4 is the power cell topological diagram of inversion valve group;
Fig. 5 is a power cell single-phase PWM modulation schematic diagram;
Fig. 6 is PWM modulation principle and output waveform.
Embodiment
See Fig. 1, Fig. 2, a kind of HVDC Light system topological, comprise two current conversion stations and direct current transportation cable composition, wherein rectification side current conversion station is made of phase shifting transformer, power cell, and inversion side current conversion station is made of 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.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 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, ac output end with each power cell inserts the transformer secondary through the LC filter circuit again, by 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.
DC transmission line 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.
See Fig. 3, the power cell input side of rectifying valve group is exported at the dc bus capacitor two ends through being rectified into direct voltage by the three-phase controlled rectifier circuit that IGBT formed for exchanging input.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. 4, the power cell input side of inversion valve group is the direct current input, through be reverse into alternating voltage output by the inverter circuit that IGBT formed.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.
Seeing Fig. 5, Fig. 6, is the basic functional principle (is example with the single-phase PWM pulse modulation technology) of PWM pulse modulation technology.The trigger impulse that relatively produces by modulating wave and triangular carrier, the switching tube high frequency of power cell upper and lower bridge arm is turned on and off, then brachium pontis mid-point voltage Uc two fixing+Ud and-switch fast between the Ud, Uc is again through then being the alternating voltage Us of net side after the reactor filtering.

Claims (2)

1. a HVDC Light system topological is characterized in that, is made up of rectification side current conversion station, inversion side current conversion station and direct current transportation cable; Described rectification side current conversion station is made of phase shifting transformer and a plurality of power cell, and 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; 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;
Described inversion side current conversion station is made of power cell, LC filter circuit and transformer, the direct current input side of 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, ac output end with each power cell inserts the transformer secondary through the LC filter circuit again, by the required alternating current of transformer output user of different model.
2. a kind of HVDC Light system topological according to claim 1 is characterized in that, 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.
CN2011100496978A 2011-03-02 2011-03-02 Light direct-current transmission system topology Pending CN102136725A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2011100496978A CN102136725A (en) 2011-03-02 2011-03-02 Light direct-current transmission system topology
PCT/CN2012/071434 WO2012126306A1 (en) 2011-03-02 2012-02-22 Topology for lightweight dc electrical transmission system

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Application Number Priority Date Filing Date Title
CN2011100496978A CN102136725A (en) 2011-03-02 2011-03-02 Light direct-current transmission system topology

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012126306A1 (en) * 2011-03-02 2012-09-27 荣信电力电子股份有限公司 Topology for lightweight dc electrical transmission system
CN103001241A (en) * 2011-09-16 2013-03-27 温县供电有限责任公司 Medium-and-close-range medium-and-low-voltage anti-theft consumption-reducing power transmission system
CN103580053A (en) * 2012-07-23 2014-02-12 Abb技术有限公司 Series-connection multi-terminal direct current transmission system and operation method used during transmission capacity loss of system
WO2014048032A1 (en) * 2012-09-26 2014-04-03 辽宁省电力有限公司大连供电公司 Adjustment method and system for flexible direct current power transmission coupling transformer on-load tap changer
CN103997054A (en) * 2014-05-30 2014-08-20 贵州电力试验研究院 High-voltage direct-current side capacitor charging method of light direct-current transmission equipment
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

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CN104283232B (en) * 2014-09-17 2016-07-13 国家电网公司 A kind of for HVDC light system unit dc-voltage balance control method
CN114296345B (en) * 2021-12-14 2024-04-16 国网湖北省电力有限公司电力科学研究院 Electric energy multiport low-voltage alternating current hybrid H2/HinfOptimization control method

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CN201994661U (en) * 2011-03-02 2011-09-28 荣信电力电子股份有限公司 Light direct current (DC) transmission system topology

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CN102136725A (en) * 2011-03-02 2011-07-27 荣信电力电子股份有限公司 Light direct-current transmission system topology

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CN101083158A (en) * 2007-04-02 2007-12-05 上海南大集团有限公司 non-magnetic aluminum-magnesium-silicon alloy wire armoured power cable
CN101741094A (en) * 2010-01-25 2010-06-16 株洲变流技术国家工程研究中心有限公司 Turn-off device-based mobile power transmission device
CN201994661U (en) * 2011-03-02 2011-09-28 荣信电力电子股份有限公司 Light direct current (DC) transmission system topology

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012126306A1 (en) * 2011-03-02 2012-09-27 荣信电力电子股份有限公司 Topology for lightweight dc electrical transmission system
CN103001241A (en) * 2011-09-16 2013-03-27 温县供电有限责任公司 Medium-and-close-range medium-and-low-voltage anti-theft consumption-reducing power transmission system
CN103580053A (en) * 2012-07-23 2014-02-12 Abb技术有限公司 Series-connection multi-terminal direct current transmission system and operation method used during transmission capacity loss of system
CN103580053B (en) * 2012-07-23 2015-12-16 Abb技术有限公司 Series-connection multi-terminal direct current system and the method for operation when its transmission capacity is lost
WO2014048032A1 (en) * 2012-09-26 2014-04-03 辽宁省电力有限公司大连供电公司 Adjustment method and system for flexible direct current power transmission coupling transformer on-load tap changer
CN103997054A (en) * 2014-05-30 2014-08-20 贵州电力试验研究院 High-voltage direct-current side capacitor charging method of light direct-current transmission equipment
CN103997054B (en) * 2014-05-30 2016-03-09 贵州电力试验研究院 A kind of light DC power transmission equipment high voltage direct current lateral capacitance charging method
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

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Application publication date: 20110727