A Unidirectional DC-DC Autotransformer for DC Grid Application

被引：0
|
作者：
Zhou, Meng [1 ]
Xiang, Wang [1 ]
Zuo, Wenping [1 ]
Lin, Weixing [1 ,2 ]
Wen, Jinyu [1 ]
机构：
[1] Huazhong Univ Sci & Technol, State Key Lab Adv Elect Engn & Technol, Wuhan 430074, Hubei, Peoples R China
[2] TBEA China Xinjiang Sunoasis Co Ltd, Xian 710000, Shaanxi, Peoples R China
来源：
ENERGIES | 2018年 / 11卷 / 03期
关键词：
DC-DC power conversion; DC power systems; DC power transmission; HVDC transmission; HVDC circuit breakers; OFFSHORE WIND FARMS; DUAL-ACTIVE BRIDGE; HVDC APPLICATIONS; CONVERTER; DESIGN; SYSTEM; MVDC;
D O I：
10.3390/en11030530
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Conventional unidirectional DC-DC converters for DC grid application employ DC-AC-DC two-stage conversion technology and suffer from high converter cost and power loss. To solve these issues, a unidirectional step-up DC-DC autotransformer (UUDAT) and a unidirectional step-down DC-DC autotransformer (DUDAT) are studied. The UUDAT and DUDAT are composed of a series connection of diode bridges and voltage source converters. Topologies of UUDAT and DUDAT are detailed. The harmonic and un-controllability issues are discussed. Control and possible application scenarios for UUDAT and DUDAT are depicted. DC fault isolation mechanism and the methods of dimensioning the voltage and power ratings of the components in UUDAT and DUDAT are studied. Extensive simulations on power system level and experiments on a UUDAT and DUDAT prototype verified their technical feasibility.
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页数：16
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