On the Bipolar MMC-HVDC Topology Suitable for Bulk Power Overhead Line Transmission: Configuration, Control, and DC Fault Analysis

被引：140

作者：

Xue, Yinglin ^{[1
]}

Xu, Zheng ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Elect Engn, Hangzhou 310027, Zhejiang, Peoples R China

来源：

IEEE TRANSACTIONS ON POWER DELIVERY | 2014年 / 29卷 / 06期

基金：

国家高技术研究发展计划(863计划);

关键词：

Clamp double submodule (CDSM); control and protection strategies; dc fault blocking; ground electrode; overhead line; MULTILEVEL; MODULATION; FREQUENCY;

D O I：

10.1109/TPWRD.2014.2352313

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

080906 [电磁信息功能材料与结构]; 082806 [农业信息与电气工程];

摘要：

This paper focuses on a bipolar modular multilevel converter (MMC)-based HVDC system, which is suitable for bulk power overhead line transmission. In this topology, each pole consists of several basic converter units (BCUs) in series or in parallel, and the BCU is the recently developed MMC adopting clamp double submodules (CDSM-MMC). Between the positive pole and the negative pole is the neutral bus which is connected to the ground electrode. To manage the power distribution among each BCU, three control layers in hierarchy are designed. Based on the equivalent circuit operations, the fault clearance principle is presented, including the calculation of the maximum inrush current. The entire fault ride-through process is described by the converter-states changing method. Detailed control sequences that cope with the temporary and permanent dc faults are proposed. Three main factors affecting the blocking time and inrush current are investigated. The feasibility and validity of the suggested topology are verified by the EMTDC simulations.

引用

页码：2420 / 2429

页数：10

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