DC-DC Converters for DC Transmission Grids

Jovcic, Dragan

doi:10.1007/978-3-030-71619-6_52-1

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Dc/dc High-power Converters1

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2023

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“…Both MMCs reach the desired voltage levels by series connection of half-bridge (HB) submodules (SMs). The medium-frequency transformer operates at a frequency of 150 Hz, which reference [21] reduction in weight and size of the components and ensuring good performance of electrical insulation and core materials. The medium-frequency transformers are designed with voltage ratio of 1:1 to reduce the requirement for insulation.…”

Section: Dc/dc High-power Convertersmentioning

confidence: 99%

Design and control of all-DC offshore wind power plant with MMC-based DC/DC high-power converters

Follo,

Saborío-Romano,

Tedeschi

et al. 2023

J. Phys.: Conf. Ser.

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This paper presents the modelling of an all-direct-current (all-DC) offshore wind power plant (OWPP) which employs DC/DC high-power converters based on modular multilevel converter (MMC) technology. A coordinated control strategy for such OWPP, designed to maximise the power output and maintain the DC voltages close to the nominal values, is also proposed. With the proposed strategy, wind turbines (WTs) are controlled to provide maximum power output according to a local maximum power point tracking (MPPT) reference signal together with a centralised curtailment signal. The response of the designed 600 MW all-DC OWPP is tested by means of dynamic simulations in MATLAB/Simulink.

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Section: Dc/dc High-power Convertersmentioning

confidence: 99%