HIGH VOLTAGE DC POWER CONVERSION SYSTEM AND METHOD OF OPERATING THE SAME
First Claim
1. A fraction rated conversion system for coupling a plurality of high voltage direct current (HVDC) power strings in parallel to an HVDC transmission system, said fraction rated conversion system comprising:
- at least one fraction rated power converter coupled to a plurality of HVDC power strings; and
at least one capacitive device coupled to said at least one fraction rated power converter, said at least one fraction rated power converter and said at least one capacitive device regulate a differential voltage across each HVDC power string of the plurality of HVDC power strings to be substantially similar to each other.
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Accused Products
Abstract
A fraction rated conversion system for coupling a plurality of high voltage direct current (HVDC) power strings in parallel to an HVDC transmission system includes at least one fraction rated power converter coupled to the plurality of HVDC power strings and at least one capacitive device coupled to the at least one fraction rated power converter. The at least one fraction rated power converter and the at least one capacitive device regulate a differential voltage across each HVDC power string of the plurality of HVDC power strings to be substantially similar to each other.
10 Citations
20 Claims
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1. A fraction rated conversion system for coupling a plurality of high voltage direct current (HVDC) power strings in parallel to an HVDC transmission system, said fraction rated conversion system comprising:
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at least one fraction rated power converter coupled to a plurality of HVDC power strings; and at least one capacitive device coupled to said at least one fraction rated power converter, said at least one fraction rated power converter and said at least one capacitive device regulate a differential voltage across each HVDC power string of the plurality of HVDC power strings to be substantially similar to each other. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electric power conversion system coupled to a high voltage direct current (HVDC) transmission system, said electric power conversion system comprising:
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a first HVDC transmission conduit having a first polarity; a second HVDC transmission conduit having a second polarity; a plurality of HVDC power strings extending in parallel between said first HVDC transmission conduit and said second HVDC transmission conduit; a fraction rated conversion system comprising; at least one fraction rated power converter coupled to said plurality of HVDC power strings; and at least one capacitive device coupled to said at least one fraction rated power converter, said at least one fraction rated power converter and said at least one capacitive device regulate a differential voltage across each HVDC power string of said plurality of HVDC power strings to be substantially similar to each other. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of operating an electric power conversion system, the electric power conversion system coupled to a high voltage direct current (HVDC) transmission system, the electric power conversion system including a first HVDC transmission conduit having a first polarity and a second HVDC transmission system having a second polarity, a plurality of HVDC power strings extending in parallel between the first HVDC transmission conduit and the second HVDC transmission conduit, and a fraction rated conversion system including at least one fraction rated power converter coupled to the plurality of HVDC power strings and at least one capacitive device coupled to the at least one fraction rated power converter, said method comprising:
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sensing a differential voltage value across each of the HVDC power strings, thereby determining a plurality of differential voltage values; comparing the plurality of differential voltage values to a predetermined reference differential voltage value; and regulating at least one differential voltage value such that the differential voltage values sensed across each of the HVDC power strings are substantially similar to each other. - View Dependent Claims (17, 18, 19, 20)
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Specification