电力系统保护与控制2017，Vol.45Issue(5)：45-50,6.DOI:10.7667/PSPC161517
基于MMC的柔性直流输电电容电压波动抑制方法
Control strategy for suppressing capacitor voltage ripple of MMC-HVDC
蔡永梁 1任成林 1周竞宇 1岳伟 2刘小勇 2张世超 2刘林2
作者信息
- 1. 中国南方电网超高压输电公司,广东广州510620
- 2. 梦网荣信科技集团股份有限公司,辽宁鞍山114051
- 折叠
摘要
Abstract
By analyzing upper and lower bridge ann current component of modular multilevel converter and characteristic of sub-module capacitor voltage ripple,and calculating the doubling-frequency current of MMC capacitor,this paper proposes an algorithm for suppressing the capacitor voltage ripple through injecting doubling harmonic current in the arm bridge current of MMC.The doubling harmonic current injection controller is designed to control the value of the current and get the optimal doubling harmonic thus to minimize the capacitor voltage fluctuation of sub-module.The capacitor voltage ripple range is compared when the suppressing circulating current is zero and second harmonic current is injected by using the simulation results based on PSCAD environment,and the capacitor voltage harmonic distortion rate is analyzed.The results verify the validity and efficiency of the algorithm.关键词
MMC/电容电压/波动抑制/2次谐波注入Key words
MMC/capacitor voltage/ripple suppression/second harmonic current injection引用本文复制引用
蔡永梁,任成林,周竞宇,岳伟,刘小勇,张世超,刘林..基于MMC的柔性直流输电电容电压波动抑制方法[J].电力系统保护与控制,2017,45(5):45-50,6.
