南方电网技术2018，Vol.12Issue(8)：8-16,9.DOI:10.13648/j.cnki.issn1674-0629.2018.08.002
提高模块化多电平换流器功率输送能力的新型环流控制算法
New Circulating Current Control Algorithm for Increasing the Power Transmission Capacity of Modular Multilevel Converter
朱良合 1盛超 1卢启付 1骆潘钿 1朱弘琪 1黄韬 1刘正富1
作者信息
- 1. 广东电网有限责任公司电力科学研究院, 广州 510080
- 折叠
摘要
Abstract
The power transmission ability of a same converter can be expanded by improving the current utilization ratio of switching devices of modular multilevel converter based HVDC ( MMC-HVDC), and hence the cost of converter of MMC-HVDC can be reduced. Based on the characteristics of MMC, this paper presents a newtype of circulating current control strategy considering double frequency harmonic current injected, and gives mathematical deduction of amplitude and phase of the double frequency sinusoidal harmonic current injected. This newstrategy can reduce the peak value of the arm current up to 20％, improve the current utilization rate of the converter, and enhance the power delivery capacity of the converter up to 25％. At last, the simulation model of MMC is established in RTLAB, and the newcirculating current suppression strategy is carried out. The simulation results verify the accuracy and effectiveness of the proposed control strategy.关键词
模块化多电平换流器/桥臂峰值电流/二倍频/环流抑制策略/电流利用率Key words
modular multi-level converter/peak value of the arm current/double frequency/circulating current suppression strategy/current utilization rate分类
信息技术与安全科学引用本文复制引用
朱良合,盛超,卢启付,骆潘钿,朱弘琪,黄韬,刘正富..提高模块化多电平换流器功率输送能力的新型环流控制算法[J].南方电网技术,2018,12(8):8-16,9.
