Circulating current control scheme of modular multilevel converters supplying passive networks under unbalanced load conditions

被引：5

作者：

Zhang, Huaitian ^{[1
]}

Wickramasinghe, Harith R. ^{[2
]}

Jing, Long ^{[1
]}

Li, Jinke ^{[3
]}

Pou, Josep ^{[4
]}

Konstantinou, Georgios ^{[2
]}

机构：

[1] Beijing Jiaotong Univ, Natl Act Distribut Network Technol Res Ctr, Beijing 100044, Peoples R China

[2] UNSW Sydney, Sch Elect Engn & Telecommun, Sydney, NSW 2052, Australia

[3] Jiangsu Elect Power Design Inst Co Ltd, China Energy Construct Grp, Nanjing 211102, Jiangsu, Peoples R China

[4] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore, Singapore

来源：

ELECTRIC POWER SYSTEMS RESEARCH | 2019年 / 171卷

基金：

澳大利亚研究理事会;

关键词：

Modular multilevel converter; MVDC; HVDC; Passive network; Load imbalance; Circulating current; Capacitor voltage ripple; CONTROL STRATEGY; VOLTAGE RIPPLES; MMC-HVDC; SUPPRESSION; SYSTEM;

D O I：

10.1016/j.epsr.2019.01.041

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：

Load imbalances in the supply of passive loads with modular multilevel converter (MMC)-based medium (MVDC) and high voltage (HVDC) dc-links are inevitable. In such applications, the maximum-allowable voltage ripples and peak arm currents define the operating limits of the MMCs. This paper demonstrates the impact of circulating current control in capacitor voltage ripples of sub-modules and peak arm currents under unbalanced load conditions when supplying passive networks, comparing the effects of three circulating current control methods on internal variables of the MMCs. The efficacy of the circulating current control is validated through real-time digital simulations of an 800 MVA benchmark MMC-based HVDC transmission system.

引用

页码：36 / 46

页数：11

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