DC transformer requirements and fault operation analysis in PV medium voltage DC power collection system

Xi, Xinze; Wang, Jianhua; Gao, Shang; Ming-qin, Zhang; Li, Peixin; Luo, Fang; Gu, Wei

doi:10.1049/joe.2019.0798

Cited by 2 publications

(4 citation statements)

References 10 publications

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“…These aspects provide a general perception of potential converters and vary in terms of importance. However, the ride through capability is required for the applications which are commonly prone to DC faults and need quick fault recoveries such as wind farms and PV MVDC collectors since the DC system has low-inertia [85], [86]. The main applications of DC-DC converters dedicated to MVDC grids will be discussed comprehensively in the following subsections with a summary shown in Table III for the critical requirements that converters should have for each application.…”

Section: Applications Of Mvdc Convertersmentioning

confidence: 99%

“…The bidirectional power flow capability is another possible feature that converters should have for DC grids interfaces [5], [58]. Required, using FBSMs with non-isolated converters [5], [71], [80], [83] Required, using FBSMs with non-isolated converters [82], [85] Required [86] Unnecessary [92], [93] Required [54], [65], [94] The isolated version of DC-DC converters such as MMC DAB converters is suitable for linking the MVDC to HVDC grids. This topology provides the isolation and the independency of both AC-DC stages.…”

Section: A DC Grids Interconnectionmentioning

confidence: 99%

“…These converters should be able to deal with high voltage and high power capacity as well. They should provide high step-up ratio, electrical isolation, FTC, high efficiency and high power density, and implement the maximum-power-point tracking (MPPT) [4], [86], [91], [102]- [105]. Also, galvanic isolation can fairly well reduce insulation requirements and components stress which fulfils the safety requirements [4], [91].…”

Section: Photovoltaic Farmsmentioning

confidence: 99%

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Isolated and Nonisolated DC-to-DC Converters for Medium-Voltage DC Networks: A Review

Alhurayyis¹,

Elkhateb²,

Morrow³

2021

IEEE J. Emerg. Sel. Topics Power Electron.

117

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MVDC technology is a promising solution to avoid installation of new AC networks. MVDC can provide optimum integration of large-scale renewable energy sources, the interconnection of different voltage levels of DC and AC grids with the ancillary services. The development in MVDC depends significantly on the DC-DC converters. Such converters support the modern trends of utilising medium-frequency transformers in power networks. Research on isolated converters technology is in its infancy and limited by the conversion ratio and component ratings. Besides, there is no standards exist covering specific aspects of isolated converter product. Thus, a review of such converters is needed. This work presents, for the first time, a review of the DC-DC power converter families in MVDC grids including the leading families which are isolated and nonisolated converters, as well as other subfamilies comparing the specifications and characteristics. Also, the applications of these converters are provided by focusing on the essential requirements for each application. Index Terms-MVDC grids, DC-DC power converters, dual active bridge (DAB), multilevel converter. TABLE I RECOMMENDED CLASSES FOR MVDC VOLTAGE MVDC Class (kV) Nominal Rated Voltage (kV) Maximum Rated Voltage (kV)

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Section: Applications Of Mvdc Convertersmentioning

confidence: 99%

Section: A DC Grids Interconnectionmentioning

confidence: 99%

Section: Photovoltaic Farmsmentioning

confidence: 99%

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Isolated and Nonisolated DC-to-DC Converters for Medium-Voltage DC Networks: A Review

Alhurayyis¹,

Elkhateb²,

Morrow³

2021

IEEE J. Emerg. Sel. Topics Power Electron.

117

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“…The response of the DC SST is analyzed. The control of DC SST must ensure that in case of a voltage dip at MVDC terminals, the voltage of the LVDC bus remains stable [9]. Control for FRT of a DC-DC converter based on an isolated boost converter is presented in [10].…”

Section: Introductionmentioning

confidence: 99%

Fault ride through of DC solid state transformer in medium voltage DC systems

Le Metayer,

Dujic,

Buttay

et al. 2023

IET Conf. Proc.

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

show abstract

DC transformer requirements and fault operation analysis in PV medium voltage DC power collection system

Cited by 2 publications

References 10 publications

Isolated and Nonisolated DC-to-DC Converters for Medium-Voltage DC Networks: A Review

Isolated and Nonisolated DC-to-DC Converters for Medium-Voltage DC Networks: A Review

Fault ride through of DC solid state transformer in medium voltage DC systems

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