作者: E. Kontos , R. Teixeira Pinto , P. Bauer
DOI: 10.1109/ECCE.2015.7310133
关键词: Electrical engineering 、 Transmission (telecommunications) 、 Engineering 、 H bridge 、 Grid 、 Modular design 、 Converters 、 Fault (power engineering) 、 Topology (electrical circuits) 、 High voltage
摘要: This paper proposes a post-fault control technique for H-bridge multilevel modular converters (MMC), which in combination with restoration framework, can achieve fast operation recovery multi-terminal direct current (MTdc) networks under different dc fault types. The studied network consists of four voltage-source (VSC) high voltage (HVdc) transmission. A meshed MTdc grid topology is used the connection two asynchronous grids offshore wind farms (OWFs). effect types on time evaluated. Following proposed steps, able to restore its within 7.4 s case pole-to-ground fault. reduced only 34 ms, if pole-to-pole occurs. To overcome main constraint that allows momentarily pole cables through MMC-VSC switch valves. In this way, discharged faster and thus, be restored. study showed that, strategy, an MMC-based after 158 ms without need expensive breakers.