Plant for transmitting electric power
First Claim
1. An HVDC plant for transmitting electric power having a direct voltage network connected to at least one alternating voltage network through a station, said station transmitting electric power between said direct voltage network and said alternating voltage network and having at least one converter for converting direct voltage to alternating voltage and the converse, said HVDC plant comprising:
- a DC/DC converter connected between poles of said direct voltage network, said DC/DC converter being adapted to create a higher voltage between the poles on the station remote side of said DC/DC converter than on the station near side wherein said DC/DC converter comprises;
a first capacitor connected between the two poles of the direct voltage network;
an inductor connected in the positive pole conductor of said direct voltage network between the station remote side of said first capacitor and a midpoint of a bridge formed by two current valves connected between the poles of said direct voltage network;
a second capacitor connected in parallel with said bridge on the station remote side of said bridge; and
means for alternatingly making said current valves conducting whereby the relationship between the conducting periods determines the relationship between the direct voltages across said first and second capacitors.
1 Assignment
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Accused Products
Abstract
A plant for transmitting electric power is provided. The plant has a direct voltage network connected to at least one alternating voltage network through a station. The station transmits electric power between the direct voltage network and the alternative voltage network and has at least one converter for converting direct voltage to alternating voltage and for converting alternating voltage to direct voltage. The plant comprises a DC/DC converter connected between the poles of the direct voltage network. The DC/DC converter is adapted to create a higher voltage between the poles on the station remote side of the DC/DC converter than on the station near side.
18 Citations
7 Claims
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1. An HVDC plant for transmitting electric power having a direct voltage network connected to at least one alternating voltage network through a station, said station transmitting electric power between said direct voltage network and said alternating voltage network and having at least one converter for converting direct voltage to alternating voltage and the converse, said HVDC plant comprising:
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a DC/DC converter connected between poles of said direct voltage network, said DC/DC converter being adapted to create a higher voltage between the poles on the station remote side of said DC/DC converter than on the station near side wherein said DC/DC converter comprises; a first capacitor connected between the two poles of the direct voltage network; an inductor connected in the positive pole conductor of said direct voltage network between the station remote side of said first capacitor and a midpoint of a bridge formed by two current valves connected between the poles of said direct voltage network; a second capacitor connected in parallel with said bridge on the station remote side of said bridge; and means for alternatingly making said current valves conducting whereby the relationship between the conducting periods determines the relationship between the direct voltages across said first and second capacitors. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification
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- Resources
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Current AssigneeAsea Brown Boveri AB (ABB Limited)
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Original AssigneeAsea Brown Boveri AB (ABB Limited)
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InventorsAsplund, Gunnar, Eriksson, Kjell
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Primary Examiner(s)Grant, William
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Assistant Examiner(s)CALCANO, IVAN
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Application NumberUS08/938,350Time in Patent Office771 DaysField of Search364/492, 364/483, 364/226.9, 364/528.21, 702/62US Class Current700/286CPC Class CodesH02J 3/36 Arrangements for transfer o...H02M 1/007 Plural converter units in c...H02M 3/158 including plural semiconduc...H02M 7/219 in a bridge configurationY02E 60/60 Arrangements for transfer o...
