Stepped 2-Level Operation of Three-Port Modular DC/DC Converter Applied in HVDC Application
High-voltage dc/dc converter is the key equipment to interconnect high-voltage dc (HVdc) systems with different voltage levels and to build dc grid. This paper presents a novel three-port modular dc/dc converter (TP-MDCC) to interconnect three HVdc systems, and it offers the following merits: 1) hig...
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| Autores principales: | , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
IEEE
2018
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/a8c5bec7d64c4911a82c1e6067311038 |
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| Sumario: | High-voltage dc/dc converter is the key equipment to interconnect high-voltage dc (HVdc) systems with different voltage levels and to build dc grid. This paper presents a novel three-port modular dc/dc converter (TP-MDCC) to interconnect three HVdc systems, and it offers the following merits: 1) high efficiency for the elimination of multiple dc/ac conversion stages and transformers; 2) modular design and small submodule (SM) capacitance requirement; 3) low <inline-formula> <tex-math notation="LaTeX">$\text{d}v/\text{d}t$ </tex-math></inline-formula> stress; and 4) the sorting algorithm of the SM capacitor voltages needs only to be executed twice in a period, which poses small computation burden. In this paper, the operation principle and the control strategy of the TP-MDCC are analyzed, and the simulation and experimental results verify the effectiveness of the converter. |
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