Operation Modes and Combination Control for Urban Multivoltage-Level DC Grid
作者： Kaiqi Sun , Ke-Jun Li , Zhuo-di Wang , Huadong Sun , Mingqiang Wang
DOI: 10.1109/TPWRD.2017.2735482
关键词: Upgrade 、 Reliability (computer networking) 、 Renewable energy 、 Engineering 、 Grid 、 High voltage 、 Topology (electrical circuits) 、 Urban economics 、 Transmission (telecommunications) 、 Electrical engineering
摘要: With the development of urban economy and growing integration renewable energy, there are increasing challenges on power grid. Due to transmission stress short-circuit current limitation, traditional grid cannot satisfy new requirements. Multivoltage-level dc (MDCG) is an alternative approach upgrade. This paper presents MDCG topology, which can be used in a future Three operation modes proposed: auto mode, power-limited stand-alone mode. The mode normal one for MDCG. designed keep capability support high voltage ac emergencies. stability case dc–dc converter system outage occurs. combination control three put forward enhance reliability various operating conditions. simulation results show that proposed effective have good performance.
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