Hybrid high voltage direct current converter system and method of operating the same
First Claim
1. A method for controlling a hybrid high voltage direct current (HVDC) converter system, the hybrid HVDC converter system including at least one direct current (DC) bus, at least one capacitor commutated converter (CCC), at least one self-commutated converter (SCC), the at least one CCC and the at least one SCC coupled in series to the at least one DC bus, the at least one CCC configured to induce a first DC voltage on the at least one DC bus, the at least one SCC configured to induce a second DC voltage on the at least one DC bus, the first DC voltage and the second DC voltage summed to define a total DC voltage induced on the at least one DC bus, said method comprising at least one of:
- regulating the total DC voltage induced on the at least one DC bus comprising regulating the first DC voltage through the at least one CCC and regulating the second DC voltage through the at least one SCC substantially simultaneously;
regulating the total DC voltage induced on the at least one DC bus comprising regulating the second DC voltage through the at least one SCC; and
regulating the total DC voltage induced on the at least one DC bus comprising regulating the first DC voltage through the at least one CCC;
wherein the at least one CCC and the at least one SCC are coupled in series.
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Accused Products
Abstract
A hybrid HVDC converter system includes a DC bus, at least one capacitor commutated converter (CCC) and at least one self-commutated converter (SCC) coupled in series through the DC bus. The CCC induces a first voltage on the DC buses, the SCC induces a second voltage on the DC bus, the first voltage and the second voltage are summed to define a total DC voltage. The method includes at least one of regulating the total DC voltage induced on the DC buses including regulating the first DC voltage through the CCC and regulating the second DC voltage through the SCC substantially simultaneously, regulating the total DC voltage induced on the DC bus including regulating the second DC voltage through the SCC, and regulating the total DC voltage induced on the DC bus including regulating the first DC voltage through the CCC.
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Citations
20 Claims
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1. A method for controlling a hybrid high voltage direct current (HVDC) converter system, the hybrid HVDC converter system including at least one direct current (DC) bus, at least one capacitor commutated converter (CCC), at least one self-commutated converter (SCC), the at least one CCC and the at least one SCC coupled in series to the at least one DC bus, the at least one CCC configured to induce a first DC voltage on the at least one DC bus, the at least one SCC configured to induce a second DC voltage on the at least one DC bus, the first DC voltage and the second DC voltage summed to define a total DC voltage induced on the at least one DC bus, said method comprising at least one of:
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regulating the total DC voltage induced on the at least one DC bus comprising regulating the first DC voltage through the at least one CCC and regulating the second DC voltage through the at least one SCC substantially simultaneously; regulating the total DC voltage induced on the at least one DC bus comprising regulating the second DC voltage through the at least one SCC; and regulating the total DC voltage induced on the at least one DC bus comprising regulating the first DC voltage through the at least one CCC; wherein the at least one CCC and the at least one SCC are coupled in series. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for controlling a hybrid high voltage direct current (HVDC) converter system, the hybrid HVDC converter system including at least one alternating current (AC) bus and at least one direct current (DC) bus, at least one capacitor commutated converter (CCC), and at least one self-commutated converter (SCC), the at least one CCC and the at least one SCC coupled in series to at least one DC bus, the at least one CCC configured to induce a first voltage on the at least one DC bus, the at least one SCC configured to induce a second voltage on the at least one DC bus, the first voltage and the second voltage summed to define a total DC voltage induced on the at least one DC bus, said method comprising:
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operating the hybrid HVDC converter system during steady-state operating conditions comprising regulating the at least one CCC to induce the first voltage on the at least one DC bus at a value substantially similar to the total DC voltage; and regulating the at least one SCC to induce the second voltage on the at least one DC bus at a residual voltage that is substantially equal to the total DC voltage minus the first voltage, thereby using the at least one SCC to finely regulate at least one of current and voltage on at least one of the at least one AC bus and the at least one DC bus; wherein the at least one CCC and the at least one SCC are coupled in series. - View Dependent Claims (18, 19, 20)
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Specification