CN102013819A - Transformer-free DC high-voltage transmission topological structure - Google Patents

Transformer-free DC high-voltage transmission topological structure Download PDF

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Publication number
CN102013819A
CN102013819A CN2010102336837A CN201010233683A CN102013819A CN 102013819 A CN102013819 A CN 102013819A CN 2010102336837 A CN2010102336837 A CN 2010102336837A CN 201010233683 A CN201010233683 A CN 201010233683A CN 102013819 A CN102013819 A CN 102013819A
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CN
China
Prior art keywords
circuit
inverter circuit
coupling
voltage
high voltage
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
CN2010102336837A
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Chinese (zh)
Inventor
赵淑玉
张坤
张跃平
胡涛
李太峰
魏西平
杨洋
王振
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Rongxin Power Electronic Co Ltd
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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.)
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Publication date
Application filed by Rongxin Power Electronic Co Ltd filed Critical Rongxin Power Electronic Co Ltd
Priority to CN2010102336837A priority Critical patent/CN102013819A/en
Publication of CN102013819A publication Critical patent/CN102013819A/en
Priority to PCT/CN2011/077139 priority patent/WO2012010066A1/en
Pending legal-status Critical Current

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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
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
    • 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
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
    • 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
    • H02M1/36—Means for starting or stopping converters

Abstract

The invention relates to a transformer-free DC high-voltage transmission topological structure which comprises a high-voltage charge circuit, an inductor, a rectifier circuit and an inverter circuit, wherein a high-voltage power grid directly passes through the high-voltage charge circuit and the coupling or non-coupling inductor and then enters the rectifier circuit of a high-voltage frequency converter, rectified direct-current voltage is conveyed to the inverter circuit through a long-distance cable for supplying power for the inverter circuit, and the inverter output end is connected to the coupling or non-coupling inductor. The rectifier circuit and a power unit of the inverter circuit are in a half-bridge or H-bridge structure. The topological structure ensures that DC high-voltage transmission equipment can realize long-distance and large-capacity electric energy transmission without a transformer.

Description

A kind of transformerless high voltage direct current transmission topological structure
Technical field
The present invention relates to a kind of high voltage direct current transmission topological structure, particularly a kind of transformerless high voltage direct current transmission topological structure.
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 high voltage direct current transmission, 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, high voltage dc transmission 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, high voltage dc transmission technology has following advantage:
When 1, carrying equal-wattage, the used wire rod of high voltage direct current transmission only is 2/3～1/2 of ac transmission;
2, in cable transmission line, high voltage direct current transmission does not have capacitance current to produce, and there is capacitance current in the high-voltage AC transmission circuit, causes loss;
3, 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 high voltage direct current transmission, its both sides AC system does not need synchronous operation, and high-voltage AC transmission must synchronous operation;
5, the high voltage direct current transmission loss of breaking down is littler than high-voltage AC transmission.In the high voltage direct current transmission, 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 HVDC (High Voltage Direct Current) transmission line, and the short circuit current of fault top-cross streaming system is the same when not interconnecting.
At present, transformer is must an obligato part in all high-voltage direct-current transmission system, so transformer case is in whole high-voltage direct-current transmission system, the cost and the volume of very big proportion have been occupied, and the high voltage power transmission equipment that capacity is big more, its capacity requirement to transformer is also high more, makes the also straight line rising of cost of high-voltage direct-current transmission system like this.
Summary of the invention
The purpose of this invention is to provide a kind of transformerless high voltage direct current transmission topological structure, this topological structure makes high-voltage direct-current transmission system need not the purpose that transformer can be realized long distance, big capacity electric energy transmitting.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of transformerless high voltage direct current transmission topological structure, it is characterized in that, comprise high-voltage charging circuit, inductance, rectification circuit, inverter circuit, high-voltage fence is directly through entering the high voltage converter rectification circuit after high-voltage charging circuit, coupling or the non-coupling inductance, it is the inverter circuit power supply that direct voltage after rectification is delivered to inverter circuit by the cable of growing distance, and inverting output terminal inserts coupling or non-coupling inductance.
The power cell of described rectification circuit, inverter circuit is the half-bridge structure that two IGBT switching devices are formed.
The power cell of described rectification circuit, inverter circuit is the H bridge construction that four IGBT switching devices are formed.
Described rectification circuit is identical with the power cell that inverter circuit adopts, but the phase trans-substitution.
Rectification circuit and inverter circuit are three-phase, whenever, form by an even number n power unit cascade, be divided into two groups up and down, every group power cell number is n/2, the input of the every phase of rectification circuit is the midpoint of two groups of unit, and is connected with coupling or non-coupling inductance between input and the every group of unit; The output of the every phase of inverter circuit is the midpoint of two groups of unit, and also is connected with coupling or non-coupling inductance between output and the every group of unit.
Compared with prior art, novelty of the present invention and creativeness are embodied in:
1) high-voltage direct-current transmission system does not have transformer, has saved transformer case, makes cost reduce half at least;
2) high-voltage direct-current transmission system does not have transformer, has saved transformer case, makes volume reduce half at least, and floor space at the scene also so at least reduces half;
3) high-voltage direct-current transmission system does not have transformer, has saved transformer case, makes weight reduce half at least, and cost of transportation is also corresponding to be reduced;
4) high-voltage direct-current transmission system does not have transformer, has saved transformer case, and the structure of high-voltage direct-current transmission system is compared simple a lot, and the production cycle reduces half at least, also helps on-the-spot installation, debugging and maintenance;
5) high-voltage direct-current transmission system does not have transformer, has saved transformer case, has saved the energy consumption at transformer, need not to consider the temperature-rise effect of high-voltage direct-current transmission system on transformer yet;
6) high-voltage direct-current transmission system does not have transformer, has saved transformer case, has absolute market competitiveness advantage.
Description of drawings
Fig. 1 is the transformerless high voltage direct current transmission topology diagram that the semibridge system power cell is formed;
Fig. 2 is the transformerless high voltage direct current transmission topology diagram that H bridge-type power cell is formed;
Fig. 3 is current direction figure in the semibridge system power cell;
Fig. 4 is current direction figure in the H bridge-type power cell.
Embodiment
See Fig. 1, Fig. 2, a kind of transformerless high voltage direct current transmission topological structure, comprise high-voltage charging circuit, inductance L, rectification circuit, inverter circuit, high-voltage fence is directly through entering the high voltage converter rectification circuit behind high-voltage charging circuit, coupling or the non-coupling inductance L, it is the inverter circuit power supply that direct voltage after rectification is delivered to inverter circuit by the cable of growing distance, and inverting output terminal inserts coupling or non-coupling inductance L2.The high-voltage charging circuit is composed in parallel by charging resistor R and K switch M.
Rectification circuit and inverter circuit are three-phase, whenever, form by an even number n power unit cascade, be divided into two groups up and down, every group power cell number is n/2, the input of the every phase of rectification circuit is the midpoint of two groups of unit, and is connected with coupling or non-coupling inductance L1 between input and the every group of unit; The output of the every phase of inverter circuit is the midpoint of two groups of unit, and also is connected with coupling or non-coupling inductance L2 between output and the every group of unit.
The power cell of rectification circuit, inverter circuit can be the half-bridge structure (Fig. 1) that two IGBT switching devices are formed; Perhaps, the power cell of rectification circuit, inverter circuit is the H bridge construction (Fig. 2) that four IGBT switching devices are formed.
Form a three-phase controlled rectifier circuit, the capacitance voltage of constant each power cell by a plurality of power cells; The high voltage converter output inserts coupling inductance or non-coupling inductance, makes output waveform stable more level and smooth; Each rectification circuit, inverter circuit power cell adopt semibridge system or H bridge-type all can satisfy the demand that the PWM waveform generates; The power cell structure that rectification circuit and inverter circuit adopted can be designed in full accord, can call mutually.
See Fig. 3-1, electric current flows to B through IGBT2 from A, adopts the power cell output level " 0 " of half bridge inverter circuit.
See Fig. 3-2, electric current flows to A through sustained diode 2 from B, adopts the power cell output level " 0 " of half bridge inverter circuit.
See Fig. 3-3, electric current by dc bus capacitor C, flows to B from A again through sustained diode 1, adopts the power cell output level " 1 " of half bridge inverter circuit.
See Fig. 3-4, electric current by dc bus capacitor C, flows to A from B again through IGBT1, adopts the power cell output level " 1 " of half bridge inverter circuit.
See Fig. 4-1, electric current flows to A through IGBT2, dc bus capacitor C, IGBT3 from B, or electric current flows to B through sustained diode 3, dc bus capacitor C, sustained diode 2 from A, adopts the power cell output level " 1 " of H bridge inverter main circuit this moment.
See Fig. 4-2, electric current flows to A through sustained diode 1, IGBT3 from B, or electric current flows to B through sustained diode 3, IGBT1 from A, adopts the power cell output level " 0 " of H bridge inverter main circuit this moment.
See Fig. 4-3, electric current flows to A through IGBT2, sustained diode 4 from B, or electric current flows to B through IGBT4, sustained diode 2 from A, adopts the power cell output level " 0 " of H bridge inverter main circuit this moment.
See Fig. 4-4, electric current flows to A through sustained diode 1, dc bus capacitor C, sustained diode 4 from B, or electric current flows to B through IGBT4, dc bus capacitor C, IGBT1 from A, adopts the power cell output level " 1 " of H bridge inverter main circuit this moment.
High-voltage fence directly passes through high-voltage charging circuit and coupling or non-coupling inductance and enters the high voltage converter rectification circuit; Form a three-phase controlled rectification system by a plurality of power cells, the capacitance voltage of constant each power cell, thereby stable firmly voltage cable; The high voltage converter output inserts coupling inductance or non-coupling inductance, makes output waveform stable more level and smooth; Each power cell inverter circuit adopts semibridge system or H bridge-type all can satisfy the demand that the PWM waveform generates; The power cell structure that rectification circuit and inverter circuit adopted is in full accord, can call mutually.

Claims (5)

1. transformerless high voltage direct current transmission topological structure, it is characterized in that, comprise high-voltage charging circuit, inductance, rectification circuit, inverter circuit, high-voltage fence is directly through entering the high voltage converter rectification circuit after high-voltage charging circuit, coupling or the non-coupling inductance, it is the inverter circuit power supply that direct voltage after rectification is delivered to inverter circuit by the cable of growing distance, and inverting output terminal inserts coupling or non-coupling inductance.
2. a kind of transformerless high voltage direct current transmission topological structure according to claim 1 is characterized in that, the power cell of described rectification circuit, inverter circuit is the half-bridge structure that two IGBT switching devices are formed.
3. a kind of transformerless high voltage direct current transmission topological structure according to claim 1 is characterized in that, the power cell of described rectification circuit, inverter circuit is the H bridge construction that four IGBT switching devices are formed.
4. according to claim 2 or 3 described a kind of transformerless high voltage direct current transmission topological structures, it is characterized in that described rectification circuit is identical with the power cell structure that inverter circuit adopts, but the phase trans-substitution.
5. according to claim 2 or 3 described a kind of transformerless high voltage direct current transmission topological structures, it is characterized in that, rectification circuit and inverter circuit are three-phase, whenever, form by an even number n power unit cascade, be divided into two groups up and down, every group power cell number is n/2, and the input of the every phase of rectification circuit is the midpoint of two groups of unit, and between input and the every group of unit to be coupled or non-coupling inductance is connected; The output of the every phase of inverter circuit is the midpoint of two groups of unit, and also is connected with coupling or non-coupling inductance between output and the every group of unit.
CN2010102336837A 2010-07-22 2010-07-22 Transformer-free DC high-voltage transmission topological structure Pending CN102013819A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2010102336837A CN102013819A (en) 2010-07-22 2010-07-22 Transformer-free DC high-voltage transmission topological structure
PCT/CN2011/077139 WO2012010066A1 (en) 2010-07-22 2011-07-14 Transformerless high voltage direct current transmission topological structure

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CN2010102336837A CN102013819A (en) 2010-07-22 2010-07-22 Transformer-free DC high-voltage transmission topological structure

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012010066A1 (en) * 2010-07-22 2012-01-26 荣信电力电子股份有限公司 Transformerless high voltage direct current transmission topological structure
JP2013066312A (en) * 2011-09-19 2013-04-11 Mitsubishi Electric Corp Power conversion device
EP2592745A1 (en) * 2011-11-10 2013-05-15 GE Energy Power Conversion GmbH Electrical converter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9515568B2 (en) 2014-03-28 2016-12-06 General Electric Company Power converter with a first string having diodes and a second string having switching units

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1910809A (en) * 2004-01-23 2007-02-07 伊顿动力品质公司 Power conversion apparatus and methods using DC bus shifting
CN101505106A (en) * 2009-02-24 2009-08-12 清华大学 Cascade multi-level converter
CN101548458A (en) * 2006-12-08 2009-09-30 西门子公司 Control of a modular power converter with distributed energy accumulators
CN201839219U (en) * 2010-07-22 2011-05-18 荣信电力电子股份有限公司 High-voltage DC (direct current) power transmission topological structure without transformer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100521506C (en) * 2007-02-02 2009-07-29 清华大学 Multi-level frequency conversion driving apparatus with energy conservation unit
CN102013819A (en) * 2010-07-22 2011-04-13 荣信电力电子股份有限公司 Transformer-free DC high-voltage transmission topological structure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1910809A (en) * 2004-01-23 2007-02-07 伊顿动力品质公司 Power conversion apparatus and methods using DC bus shifting
CN101548458A (en) * 2006-12-08 2009-09-30 西门子公司 Control of a modular power converter with distributed energy accumulators
CN101505106A (en) * 2009-02-24 2009-08-12 清华大学 Cascade multi-level converter
CN201839219U (en) * 2010-07-22 2011-05-18 荣信电力电子股份有限公司 High-voltage DC (direct current) power transmission topological structure without transformer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
《Industrial Electronics and Applications, 2009. ICIEA 2009, 4th IEEE Conference》 20090630 KONSTANTINOU, G. S.等 Performance Evaluation of Half-Bridge Cascaded Multilevel Converters Operated with Multicarrier Sinusoidal PWM Techniques , *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012010066A1 (en) * 2010-07-22 2012-01-26 荣信电力电子股份有限公司 Transformerless high voltage direct current transmission topological structure
JP2013066312A (en) * 2011-09-19 2013-04-11 Mitsubishi Electric Corp Power conversion device
EP2592745A1 (en) * 2011-11-10 2013-05-15 GE Energy Power Conversion GmbH Electrical converter
CN103107712A (en) * 2011-11-10 2013-05-15 Ge能源电力转换有限公司 Electrical frequency converter, electrical converter and electrical network clutch converter
US9178443B2 (en) 2011-11-10 2015-11-03 Ge Energy Power Conversion Gmbh Electrical frequency converter for coupling an electrical power supply grid with an electrical drive

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Application publication date: 20110413