Characteristic Investigation and Control of a Modular Multilevel Converter-Based HVDC System Under Single-Line-to-Ground Fault Conditions

被引：130

作者：

Shi, Xiaojie ^{[1
]}

Wang, Zhiqiang ^{[1
]}

Liu, Bo ^{[1
]}

Liu, Yiqi ^{[1
,2
]}

Tolbert, Leon M. ^{[3
,4
]}

Wang, Fred ^{[3
,4
]}

机构：

[1] Univ Tennessee, Dept Elect Engn & Comp Sci, Ctr Ultrawide Area Resilient Elect Energy Transm, Knoxville, TN 37996 USA

[2] Harbin Inst Technol, Harbin 150001, Peoples R China

[3] Oak Ridge Natl Lab, Natl Transportat Res Ctr, Knoxville, TN 37932 USA

[4] Univ Tennessee, Dept Elect Engn & Comp Sci, Knoxville, TN 37996 USA

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2015年 / 30卷 / 01期

基金：

美国国家科学基金会;

关键词：

High-voltage direct-current (HVDC); modular multilevel converter (MMC); single-line-to-ground (SLG) fault; VOLTAGE-SOURCE-CONVERTER; CONTROL SCHEME; TRANSMISSION;

D O I：

10.1109/TPEL.2014.2323360

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：

This paper presents the analysis and control of a multilevel modular converter (MMC)-based HVDC transmission system under three possible single-line-to-ground fault conditions, with special focus on the investigation of their different fault characteristics. Considering positive-, negative-, and zero-sequence components in both arm voltages and currents, the generalized instantaneous power of a phase unit is derived theoretically according to the equivalent circuit model of the MMC under unbalanced conditions. Based on this model, a novel double-line frequency dc-voltage ripple suppression control is proposed. This controller, together with the negative-and zero-sequence current control, could enhance the overall fault-tolerant capability of the HVDC system without additional cost. To further improve the fault-tolerant capability, the operation performance of the HVDC system with and without single-phase switching is discussed and compared in detail. Simulation results from a three-phase MMC-HVDC system generated with MATLAB/Simulink are provided to support the theoretical analysis and proposed control schemes.

引用

页码：408 / 421

页数：14

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