A High Step-Up Ratio Soft-Switching DC–DC Converter for Interconnection of MVDC and HVDC Grids
DC grid technology is regarded as a promising solution for future electric networks integrating a great amount of renewable energies. It calls for high-efficiency dc-dc converters with high voltage step-up ratio to interconnect medium-voltage (MV) dc distribution grids and high-voltage (HV) dc trans...
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| Veröffentlicht in: | IEEE transactions on power electronics 2018-04, Vol.33 (4), p.2986-3001 |
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| container_title | IEEE transactions on power electronics |
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| creator | Cui, Shenghui Soltau, Nils De Doncker, Rik W. |
| description | DC grid technology is regarded as a promising solution for future electric networks integrating a great amount of renewable energies. It calls for high-efficiency dc-dc converters with high voltage step-up ratio to interconnect medium-voltage (MV) dc distribution grids and high-voltage (HV) dc transmission grids. This paper presents an isolated bidirectional soft-switching dc-dc converter combining two-level converters in parallel on the MV side and a modular multilevel converter (MMC) on the HV side. A dedicated control method of the proposed converter is presented. By the proposed method, a certain reactive current is injected into the MV side by the MMC to ensure soft-switching on the MV side. The proposed converter presents low power-semiconductor total device rating and low semiconductor losses over a wide power range at variable input and output voltages. Simulation of a 50 kV/400 kV, 400 MW converter is conducted to evaluate semiconductor losses and verify the validity of this work. |
| doi_str_mv | 10.1109/TPEL.2017.2702207 |
| format | Article |
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It calls for high-efficiency dc-dc converters with high voltage step-up ratio to interconnect medium-voltage (MV) dc distribution grids and high-voltage (HV) dc transmission grids. This paper presents an isolated bidirectional soft-switching dc-dc converter combining two-level converters in parallel on the MV side and a modular multilevel converter (MMC) on the HV side. A dedicated control method of the proposed converter is presented. By the proposed method, a certain reactive current is injected into the MV side by the MMC to ensure soft-switching on the MV side. The proposed converter presents low power-semiconductor total device rating and low semiconductor losses over a wide power range at variable input and output voltages. Simulation of a 50 kV/400 kV, 400 MW converter is conducted to evaluate semiconductor losses and verify the validity of this work.</description><identifier>ISSN: 0885-8993</identifier><identifier>EISSN: 1941-0107</identifier><identifier>DOI: 10.1109/TPEL.2017.2702207</identifier><identifier>CODEN: ITPEE8</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>Capacitors ; Converters ; DC-DC power converters ; DC–DC converter ; Electric potential ; Electric power transmission ; Electrical networks ; High voltages ; high-voltage dc (HVDC) ; HVDC transmission ; medium-voltage dc (MVDC) ; modular multilevel converter (MMC) ; Semiconductor devices ; Snubbers ; soft switching ; Switching theory ; Voltage converters (DC to DC) ; Windings</subject><ispartof>IEEE transactions on power electronics, 2018-04, Vol.33 (4), p.2986-3001</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. 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It calls for high-efficiency dc-dc converters with high voltage step-up ratio to interconnect medium-voltage (MV) dc distribution grids and high-voltage (HV) dc transmission grids. This paper presents an isolated bidirectional soft-switching dc-dc converter combining two-level converters in parallel on the MV side and a modular multilevel converter (MMC) on the HV side. A dedicated control method of the proposed converter is presented. By the proposed method, a certain reactive current is injected into the MV side by the MMC to ensure soft-switching on the MV side. The proposed converter presents low power-semiconductor total device rating and low semiconductor losses over a wide power range at variable input and output voltages. Simulation of a 50 kV/400 kV, 400 MW converter is conducted to evaluate semiconductor losses and verify the validity of this work.</description><subject>Capacitors</subject><subject>Converters</subject><subject>DC-DC power converters</subject><subject>DC–DC converter</subject><subject>Electric potential</subject><subject>Electric power transmission</subject><subject>Electrical networks</subject><subject>High voltages</subject><subject>high-voltage dc (HVDC)</subject><subject>HVDC transmission</subject><subject>medium-voltage dc (MVDC)</subject><subject>modular multilevel converter (MMC)</subject><subject>Semiconductor devices</subject><subject>Snubbers</subject><subject>soft switching</subject><subject>Switching theory</subject><subject>Voltage converters (DC to DC)</subject><subject>Windings</subject><issn>0885-8993</issn><issn>1941-0107</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kEtOwzAURS0EEqWwAMTEEuMUP3_ieFilpa1UBKIt02ASu00FdnBSEDP2wA5ZCYlaMXp3cO590kHoEsgAgKib5cN4PqAE5IBKQimRR6gHikNEgMhj1CNJIqJEKXaKzup6SwhwQaCHnod4Wq43eNGYKlpV-FE3pccLb5to8Vk2-aZ0azxKf79_RilOvfswoTEBWx_wzLUp986ZvO047C2-e2op7Qo87cIklEV9jk6sfq3NxeH20ep2vEyn0fx-MkuH8yinijUR6FjRApQ1QnGjpI51IpKYxi9gNEtibvOcMCFtnBBmY6lYoakxPE90wRlhrI-u97tV8O87UzfZ1u-Ca19mFCQXggLhLQV7Kg--roOxWRXKNx2-MiBZJzLrRGadyOwgsu1c7TulMeafl4qCkJz9AQ-dbTQ</recordid><startdate>20180401</startdate><enddate>20180401</enddate><creator>Cui, Shenghui</creator><creator>Soltau, Nils</creator><creator>De Doncker, Rik W.</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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It calls for high-efficiency dc-dc converters with high voltage step-up ratio to interconnect medium-voltage (MV) dc distribution grids and high-voltage (HV) dc transmission grids. This paper presents an isolated bidirectional soft-switching dc-dc converter combining two-level converters in parallel on the MV side and a modular multilevel converter (MMC) on the HV side. A dedicated control method of the proposed converter is presented. By the proposed method, a certain reactive current is injected into the MV side by the MMC to ensure soft-switching on the MV side. The proposed converter presents low power-semiconductor total device rating and low semiconductor losses over a wide power range at variable input and output voltages. Simulation of a 50 kV/400 kV, 400 MW converter is conducted to evaluate semiconductor losses and verify the validity of this work.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/TPEL.2017.2702207</doi><tpages>16</tpages><orcidid>https://orcid.org/0000-0002-4308-4318</orcidid></addata></record> |
| fulltext | fulltext_linktorsrc |
| identifier | ISSN: 0885-8993 |
| ispartof | IEEE transactions on power electronics, 2018-04, Vol.33 (4), p.2986-3001 |
| issn | 0885-8993 1941-0107 |
| language | eng |
| recordid | cdi_ieee_primary_7921574 |
| source | IEEE Electronic Library Online |
| subjects | Capacitors Converters DC-DC power converters DC–DC converter Electric potential Electric power transmission Electrical networks High voltages high-voltage dc (HVDC) HVDC transmission medium-voltage dc (MVDC) modular multilevel converter (MMC) Semiconductor devices Snubbers soft switching Switching theory Voltage converters (DC to DC) Windings |
| title | A High Step-Up Ratio Soft-Switching DC–DC Converter for Interconnection of MVDC and HVDC Grids |
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