WO2011127982A1 - Common mode choke for dc transmission lines - Google Patents
Common mode choke for dc transmission lines Download PDFInfo
- Publication number
- WO2011127982A1 WO2011127982A1 PCT/EP2010/054996 EP2010054996W WO2011127982A1 WO 2011127982 A1 WO2011127982 A1 WO 2011127982A1 EP 2010054996 W EP2010054996 W EP 2010054996W WO 2011127982 A1 WO2011127982 A1 WO 2011127982A1
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- WO
- WIPO (PCT)
- Prior art keywords
- converter
- current
- core
- closed circuit
- pole
- Prior art date
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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
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/38—Auxiliary core members; Auxiliary coils or windings
-
- 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
- H02M1/14—Arrangements for reducing ripples from dc input or output
- H02M1/15—Arrangements for reducing ripples from dc input or output using active 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
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
- H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/75—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/757—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/7575—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only for high voltage direct transmission link
-
- 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
- H02J2003/365—Reducing harmonics or oscillations in HVDC
-
- 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
- H02M1/123—Suppression of common mode voltage or current
-
- 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]
Definitions
- such converters may when converti ng DC voltage into AC voltage i n addition to the desired AC voltage also produce undesired voltage components. These may be unbalance voltage components at the fundamental or zero seq uence and negative sequence. These may also be voltage harmonics at higher frequencies, which may follow any phase sequence, i .e. positive, negative or zero sequence. Zero sequence components are of common mode nature, and it is of vital importance to pre- vent such components from being present on the DC-side of the converter, such as i n a DC cable/line or on the AC-side of the converter, such as in an AC grid .
- One way of preventing common mode interaction between the converter, the AC g rid and the DC ca ble is to place a common mode i nductor in series with the converter as shown in appended Fig 1 .
- Such an inductor 1 can be placed either on the DC-side 2 of the AC/DC-converter 3 as shown in Fig 1 or on the AC-side 4, i n which case it has to be a three-phase device.
- Such an i nductor should present large inductance for common mode currents in order to block such currents from bei ng present in the DC pole conductors 5, 6.
- the device should preferably be cost-effective to manufacture and transport.
- the i nductor should preferably not be mag- netized by the main current, which for this DC-side application implies the large differential mode DC current which transfers power between the converter and the DC system.
- the present invention more particularly relates to a device for removing common mode currents resulting from operation of an AC/DC-converter in a power transmission system, said device comprising one first winding configured to be connected i n series with a pole conductor on a DC-side of said converter and another first windi ng configured to be connected i n series with another pole conductor on said DC-side of the converter and at least one i nductor core around which said windings are arranged so as to reset DC mmf caused in said core by differential mode current flowing i n said pole conductors
- said arrangement comprises means configured to measure the mag- netic DC flux in said cores and send information thereabout to said control unit configured to generate a said current in said closed circuit for regulating said fl ux to be zero.
- Figs 1 and 2 are schematical views of devices for removing common mode currents resulting from operation of an AC/DC converter belonging to the prior art
- Fig 3 schematically illustrates a device 10 according to an em- bodiment of the invention connected to a power transmission system having an AC/DC converter 11 with an AC-side 12, preferably in the form of a three-phase AC grid, and a DC-side 13 on which the device is arranged.
- the power transmission system has a control apparatus 14 controlling the operation of the con- verier 11, such as possibly according to a PWM (Pulse Width Modulation) pattern in the case of a Voltage Source Converter.
- Two pole conductors 15, 16 connect the DC-side of the converter to a DC system, such as cables for transmitting High Voltage Direct Current over a long distance, such as in the order of hundreds of kilometres.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
A device for removing common mode currents resulting from operation of an AC/DC converter (11) in a power transmission system has two inductors (17, 18) each having one core (19, 20), one first winding (21, 22) configured to be connected in series with a pole conductor (15, 16) on a DC-side of a said converter, and one second winding (23, 24) also wound around said core. The second windings of the two inductors are connected in series to form a closed circuit (25) including a DC voltage source (26) to be controlled to generate a current in said closed circuit so as to obtain a reset of the DC mmf caused in the respective core by the differential mode current flowing through the respective pole conductor.
Description
COMMON MODE CHOKE FOR DC TRANSMISSION LINES
FI ELD OF TH E I NVENTI ON
The invention relates to the field of power transmission systems includi ng at least one AC/DC-converter of any conceivable type, such as a forced commutated or a line commutated converter.
In operation such converters may when converti ng DC voltage into AC voltage i n addition to the desired AC voltage also produce undesired voltage components. These may be unbalance voltage components at the fundamental or zero seq uence and negative sequence. These may also be voltage harmonics at higher frequencies, which may follow any phase sequence, i .e. positive, negative or zero sequence. Zero sequence components are of common mode nature, and it is of vital importance to pre- vent such components from being present on the DC-side of the converter, such as i n a DC cable/line or on the AC-side of the converter, such as in an AC grid .
One way of preventing common mode interaction between the converter, the AC g rid and the DC ca ble is to place a common mode i nductor in series with the converter as shown in appended Fig 1 . Such an inductor 1 can be placed either on the DC-side 2 of the AC/DC-converter 3 as shown in Fig 1 or on the AC-side 4, i n which case it has to be a three-phase device. Such an i nductor should present large inductance for common mode currents in order to block such currents from bei ng present in the DC pole conductors 5, 6. At the same time, the device should preferably be cost-effective to manufacture and transport. For this reason the i nductor should preferably not be mag- netized by the main current, which for this DC-side application
implies the large differential mode DC current which transfers power between the converter and the DC system.
BACKGROUND ART
The present invention more particularly relates to a device for removing common mode currents resulting from operation of an AC/DC-converter in a power transmission system, said device comprising one first winding configured to be connected i n series with a pole conductor on a DC-side of said converter and another first windi ng configured to be connected i n series with another pole conductor on said DC-side of the converter and at least one i nductor core around which said windings are arranged so as to reset DC mmf caused in said core by differential mode current flowing i n said pole conductors
Such a device is known through US 5 905 642 and a known device of this type is shown i n Fig 2. "Removi ng" here means blocking to such an extent that the currents are substantially not noticeable in the sense that they are below limits for common mode currents set by standards, regulations etc. The device shown in Fig 2 has two tightly coupled windings 7, 8 connected i n series with a pole conductor 5, 6 each and wound around a common core 9. The mmf:s (magnetomotive force) of the wi ndings 7, 8 will in such an i nductor be cancelled out for differential mode currents, thus not causing any fl ux i n the core 9. For common mode currents, on the other hand , the mmf:s will add up and the device will provide a high inductance preventing such currents from bei ng present in the DC pole conductors.
In a device of this type proper i nsulation has to be provided for the two windi ngs over which full pole-to-pole DC voltage is present. I n the case of high voltages, such as for an HVDC (High
Voltage Direct Current) application, this often means a voltage in excess of 100 kV and may well be in excess of 500 kV, such as 800 kV. It presents severe difficulties to obtain proper insulation for such high voltages in an inductor of the type shown in Fig 2.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a device of the type defined above addressing the problem of constraints put on the insulation system necessary for such a device.
This object is according to the invention obtained by providing such a device, which comprises two inductors each having a core, wherein one of these two inductors has said one of said first windings and one second winding wound around its core and the other of these two conductors has said another of said first windings and another second winding wound around its core, wherein the second windings of the two inductors are connected in series to form a closed circuit including a DC voltage source, and wherein the device further comprises on one hand a unit configured to control said voltage source to generate a current in said closed circuit so as to obtain said reset of the DC mmf caused in the respective core by the differential mode current flowing through the respective said pole conductor and on the other an arrangement configured to provide said control unit with information about the magnitude of said current to be generated in said closed circuit. By providing such a device with two separate inductors each having one winding connected in series with a pole conductor, the voltage present in each inductor will only be the potential difference between the respective pole conductor and said closed circuit, so that the problems with providing proper insulation will be remarkably reduced. The closed circuit is preferably on ground potential, which then means that the
voltage will be half the voltage in the known inductor shown i n Fig 2. It is still ensured that the DC mmf caused in the respective core by the differential mode current flowing through the respective said pole conductor and by the winding connected in series therewith is cancelled out by controlling the DC voltage source to generate an appropriate current flowing i n said closed circuit and through the respective second winding in the respective inductor. Each of the two inductors in the device accordi ng to the present invention will be smaller than the inductor in a correspondin g kn own d evi ce h avi n g o n ly o n e inductor, which may under some circumstances be an advantage when transporting the equipment.
Accordi ng to an embodiment of the invention said arrangement comprises means configured to be connected to an apparatus for control of said converter so as to collect information about the current to be created by the operation of said converter in said pole conductors. The control apparatus of the converter has information concerni ng the magnitude of the current created in the DC pole conductors, so that this is one way of obtaini ng i nformation suitable for determi ning the magnitude of the current to be created i n said closed circuit. The arrangement may also comprise means configured to measure the DC current flowing in a said pole conductor for providing information thereabout to said control unit, which constitutes another embodiment of the invention.
Accordi ng to another embodiment of the invention said arrangement comprises means configured to measure the mag- netic DC flux in said cores and send information thereabout to said control unit configured to generate a said current in said closed circuit for regulating said fl ux to be zero. Using such a feedback component for ensuri ng that the result aimed at, namely a magnetic DC flux being z e ro , i s o b ta i n e d i s advantageously combi ned with obtaini ng information a bout the actual DC-current as according to any of the two embodiments
previously mentioned for obtai ning proper control of said DC voltage source. The magnetic DC flux measuri ng means may comprise Hall elements. Accordi ng to another embodimen t of th e i nve n ti o n sa i d two windings first mentioned are configured to be connected in series with a pole conductor each on a DC-side of a converter having a voltage of > 10 kV, 1 0 kV-1 000 kV, 100 kV- 1000 kV or 400 kV- 1000 kV between said two pole conductors. The inven- tion is normally the more interesting the higher the voltage between said two pole conductors is in the intended application of said device.
Accordi ng to another embodiment of the invention the device is configured to remove common mode currents resulting from operation of an AC/DC converter in a High Voltage Direct Current power transmission system, and according to another embodiment of the i nvention the device is configured to remove common mode currents resulting from operation of a Voltage Source Converter.
The invention also relates to a plant configured to transmit electric power through High Voltage Direct Current being provided with a device according to the present invention on a DC- side of a said converter of the plant as well as a use of a device accordi ng to the invention for removing common mode currents resulting from operation of an AC/DC converter in a power transmission system. The advantages of such an electric power plant and said use of a device according to the invention appear clearly from the a bove d iscussion of a device accord ing to the present invention.
Further advantages as well as advantageous features of the invention will appear from the following description .
BRIEF DESCRIPTION OF THE DRAWING
With reference to the appended drawing below follows a specific description of an embodiment of the invention cited as an exam- pie.
In the drawing:
Figs 1 and 2 are schematical views of devices for removing common mode currents resulting from operation of an AC/DC converter belonging to the prior art, and
Fig 3 is a similar view of such a device according to an embodiment of the present invention.
DETAILED DESCRIPTION OF AN EMBODIMENT OF THE INVENTION
Fig 3 schematically illustrates a device 10 according to an em- bodiment of the invention connected to a power transmission system having an AC/DC converter 11 with an AC-side 12, preferably in the form of a three-phase AC grid, and a DC-side 13 on which the device is arranged. The power transmission system has a control apparatus 14 controlling the operation of the con- verier 11, such as possibly according to a PWM (Pulse Width Modulation) pattern in the case of a Voltage Source Converter. Two pole conductors 15, 16 connect the DC-side of the converter to a DC system, such as cables for transmitting High Voltage Direct Current over a long distance, such as in the order of hundreds of kilometres.
The device according to the invention comprises two inductors 17, 18 each having one core 19, 20, which may have a similar design as the core of the inductor shown in Fig 2, one winding 21, 22 connected in series with a pole conductor 15 and 16, respectively, as well as one second winding 23, 24. The two
windings of the respective inductor are wound around the core of that inductor.
The two second wi ndings 23, 24 are connected i n series to form a closed circuit 25 incl udi ng a DC voltage source 26, which may be implemented by equipment normally used for field exciters for synchronous machi nes, and such a reuse of existi ng products would then reduce costs for a device accordi ng to the invention.
The two inductors present large i nductance for common mode currents, which may be generated by the operation of the converter 1 1 , but at the same time they reset the DC magnetomotive forces caused by the differential mode DC load current ld flowing in said pole conductors by appropriately controlli ng the current flowing in said closed circuit 25. The device has for this sake a control un it 27 control l ing the DC voltage sou rce 26 to generate such a current in the closed circuit 25. For enabling this, the device comprises an arrangement configured to provide the control unit with i nformation about the magnitude of the current to be generated in the closed circuit, and it is shown how this arrangement may comprise means 28 configured to be connected to the control apparatus 14 of the converter and/or means 29 configured to measure the DC current in a said pole conductor and send information thereabout to the control unit 29 and/or means 30, such as Hall elements, configured to measure the magnetic DC flux in the cores 1 9, 20 and send information thereabout to the control unit. A device of this type is preferably provided with means providing information about said magnetic DC flux i n the core of the two inductors and means of any type providing information about the magnitude of the DC current flowing in the pole conductors. Accordingly, the DC voltage source 26 is equipped with an automatic control system ensuring that appropriate DC current is always flowi ng i n said closed circuit 25 and accordingly in the second windi ngs 23, 24 of the two inductors 1 7, 18.
The closed circuit 25 is on ground potential reducing the voltage in the two inductors to be half the pole-to-pole voltage reduci ng the difficulties in terms of insulation system remarkably with re- spect to a known device having the full pole-to-pole DC voltage in the i nductor.
The i nvention is of course not i n any way restricted to the embodiments descri bed above, but many possi bilities to modifica- tions thereof wi ll be apparent to a person with ord inary skil l in the art without departing from the scope of the invention as defined i n the appended claims.
Claims
1 . A device for removi ng common mode currents resulting from operation of an AC/DC-converter (1 1 ) in a power transmission system, said device comprising one first winding (21 ) connected in series with a pole conductor (1 5) on a DC-side ( 13) of said converter and another first winding (22) connected in series with another pole conductor (16) on said DC-side of the converter and at least one ind uctor core around wh ich said wi ndi ngs are arranged so as to reset DC mmf caused in s a i d c o re by differential mode current flowing in the pole conductors,
characterized in that said device comprises two inductors (1 7, 18) each having a core (1 9, 20),
that one (1 7) of these two inductors has said one (21 ) of said first windings and one second winding (23) wound around its core and the other (18) of these two inductors has said another (22) of said first windings and another second windi ng (24) wound around its core,
that the second windings of the two inductors are connected i n series to form a closed circuit (25) in cl u d i n g a D C voltag e source (26),
and that the device further comprises on one hand a unit (27) configured to control said voltage source to generate a current in said closed circuit so as to obtain said reset of the DC mmf caused i n the respective core (19, 20) by the differential mode current flowing through the respective said pole conductor and on the other an arrangement configured to provide said control unit with i nformation about the magnitude of said current to be generated i n said closed circuit.
2. A device according to claim 1 , characterized i n that one node of said closed circuit (25) is on ground potential .
3. A device according to claim 1 or 2, characterized in that said arrangement comprises means (28) configured to be connected to an apparatus (14) for control of said converter (1 1 ) so as to collect information about the current to be created by the operation of said converter in said pole conductors.
4. A device according to any of the preceding claims, charac- terized in that said arrangement comprises means (29) configured to measure the DC current flowing in a said pole conductor (15, 16) for providing information thereabout to said control unit (27).
5. A device according to any of the preceding claims, characterized in that said arrangement comprises means (30) configured to measure the magnetic DC flux in said cores (19, 20) and send information thereabout to said control unit (27) configured to generate a said current in said closed circuit (25) for regulat- ing said flux to be zero.
6. A device according to claim 5, characterized in that said magnetic DC flux measuring means (30) comprises Hall elements.
7. A device according to any of the preceding claims, characterized in that said two windings (21, 22) first mentioned are configured to be connected in series with a pole conductor (15, 16) each on a DC-side of a converter having a voltage of > 10 kV, 10 kV-1000 kV, 100 kV-1000 kV or 400 kV-1000 kV between said two pole conductors.
8. A device according to any of the preceding claims, characterized in that it is configured to remove common mode currents resulting from operation of an AC/DC-converter (11) in a High Voltage Direct Current power transmission system.
9. A device according to any of the preceding claims, characterized in that it is configured to remove common mode currents resulting from operation of a Voltage Source Converter.
10. A plant configu red to transmit electric power through High Voltage Direct Current, characterized in that it is provided with a device accordi ng to any of claims 1 -9 on a DC-side of a said converter of the plant.
1 1 . Use of a device according to any of claims 1 -9 for removing common mode currents resulting from operation of an AC/DC- converter in a power transmission system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2010/054996 WO2011127982A1 (en) | 2010-04-15 | 2010-04-15 | Common mode choke for dc transmission lines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2010/054996 WO2011127982A1 (en) | 2010-04-15 | 2010-04-15 | Common mode choke for dc transmission lines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011127982A1 true WO2011127982A1 (en) | 2011-10-20 |
Family
ID=43608748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2010/054996 WO2011127982A1 (en) | 2010-04-15 | 2010-04-15 | Common mode choke for dc transmission lines |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2011127982A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2602921A1 (en) | 2011-12-09 | 2013-06-12 | Schneider Toshiba Inverter Europe SAS | Power converter with variable inductance |
| WO2014206651A1 (en) * | 2013-06-26 | 2014-12-31 | Sma Solar Technology Ag | Method and device for identifying an arc |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995004395A1 (en) * | 1993-08-03 | 1995-02-09 | Asea Brown Boveri Ab | Hvdc transmission |
| US5905642A (en) | 1997-11-11 | 1999-05-18 | Robicon Corporation | Apparatus and method to reduce common mode voltage from current source drives |
| US6617814B1 (en) * | 2001-04-11 | 2003-09-09 | Rockwell Automation Technologies, Inc. | Integrated DC link choke and method for suppressing common-mode voltage in a motor drive |
| WO2008024039A1 (en) * | 2006-08-25 | 2008-02-28 | Abb Technology Ltd | Dc filter and voltage source converter station comprising such filter |
-
2010
- 2010-04-15 WO PCT/EP2010/054996 patent/WO2011127982A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995004395A1 (en) * | 1993-08-03 | 1995-02-09 | Asea Brown Boveri Ab | Hvdc transmission |
| US5905642A (en) | 1997-11-11 | 1999-05-18 | Robicon Corporation | Apparatus and method to reduce common mode voltage from current source drives |
| US6617814B1 (en) * | 2001-04-11 | 2003-09-09 | Rockwell Automation Technologies, Inc. | Integrated DC link choke and method for suppressing common-mode voltage in a motor drive |
| WO2008024039A1 (en) * | 2006-08-25 | 2008-02-28 | Abb Technology Ltd | Dc filter and voltage source converter station comprising such filter |
Non-Patent Citations (1)
| Title |
|---|
| MA HONGFEI ET AL: "A new common-mode sinusoidal inverter output filter", POWER ELECTRONICS SPECIALISTS CONFERENCE; [ANNUAL POWER ELECTRONICS SPECIALISTS CONFERENCE],, vol. 2, 23 June 2002 (2002-06-23), pages 858 - 862, XP010747446, ISBN: 978-0-7803-7262-7 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2602921A1 (en) | 2011-12-09 | 2013-06-12 | Schneider Toshiba Inverter Europe SAS | Power converter with variable inductance |
| FR2984037A1 (en) * | 2011-12-09 | 2013-06-14 | Schneider Toshiba Inverter | POWER CONVERTER HAVING VARIABLE INDUCTANCE |
| WO2014206651A1 (en) * | 2013-06-26 | 2014-12-31 | Sma Solar Technology Ag | Method and device for identifying an arc |
| CN105308840A (en) * | 2013-06-26 | 2016-02-03 | 艾思玛太阳能技术股份公司 | Method and device for identifying an arc |
| US10502778B2 (en) | 2013-06-26 | 2019-12-10 | Sma Solar Technology Ag | Method and apparatus for electric arc detection |
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