Multiport DC-DC-AC Modular Multilevel Converters For Hybrid AC/DC Power Systems

被引：22

作者：

Rouhani, Mohammadhadi ^{[1
]}

Kish, Gregory J. ^{[1
]}

机构：

[1] Univ Alberta, Elect & Comp Engn, Edmonton, AB T6G 1H9, Canada

来源：

IEEE TRANSACTIONS ON POWER DELIVERY | 2020年 / 35卷 / 01期

关键词：

HVDCconverters; dc-dc power conversion; dc-ac power conversion; HVDC; MMC; MODELS;

D O I：

10.1109/TPWRD.2019.2927324

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Hybrid ac/dc power systems will rely on power electronics to enable controlled energy exchange between different dc and ac systems. Multiport dc-dc-ac (MP-DC2AC) converters offer the ability to exchange power between two dc systems and an ac system using a single converter structure. Potential benefits include reduced energy conversion stages and a more compact station footprint. To date, limited information is available on modeling, operation, and control of MP-DC2AC converters suitable for HVDC and MVDC applications. This paper helps to fill this gap by presenting a generalized modeling and control framework for two yet unexploredMP-DC2AC modular multilevel converters. Based on derived analytical models of internal power transfer mechanisms, a dynamic controller is proposed that allows independent control of port power flows while keeping capacitor voltages regulated. Results are validated by extensive time-domain simulations. A comprehensive comparative analysis between four different MP-DC2AC topologies is carried out.

引用

页码：408 / 419

页数：12

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