To establish a modem power system characterized by high renewable energy and power-electronic source integration,innovative HVDC technology endowed with exceptional grid-forming and active-supporting capabilities is imperative.To this end,based on"a generation of device to a generation of converter,and further a generation of system",this paper proposes the concept of new-generation resilient HVDC.The intrinsic semiconductor structure brings enhanced integrated gate-commutated thyristor(IGCT-Plus)ultrahigh surge-current capacity,and thus builds a stable basement of high-overload converters.The modular commutated converter(MCC)has excellent soft-switching characteristic,making it the premier solution for resilient HVDC systems.IGCT-Plus and MCC jointly contribute a novel resilient HVDC system with high voltage-and frequency-support.This paper comprehensively demonstrates resilient HVDC technology from the aspects of device,converter,and system.Then,key problems and technologies of resilient HVDC in the further development are analyzed and prospected from multiple levels.The proposed resilient HVDC is of great significance in supporting the safe and stable operation of modem power system,and it is possible to become a promising solution to future electricity transmission.
关键词
直流输电/功率半导体器件/门极换流晶闸管/交直流换流器
Key words
DC transmission/power-semiconductor devices/gate commutated thyristor/AC/DC converter
维普
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