Research on Hysteresis-band Current Tracking Strategy for Modular Multilevel Converter in DG System

DOI

10.2991/iea-15.2015.28How to use a DOI?

Keywords

Modular multilevel converter(MMC); DG system; Dc bus voltage; Hysteresis-band current tracking control; Voltage balancing control.

Abstract

Modular multilevel converter(MMC) can be used in DG system. The double closed-loop control strategy including dc bus voltage outer loop and current inner loop is adopted in the control system, which makes dc bus voltage stable even when active power changes. The current inner loop has a new control strategy which is hysteresis-band current tracking control. By real-time monitoring the voltage of the grid and the deviation between the output current and the given current, the input submodules’ number of upper/lower arm is determined. Monitoring the direction of current in one arm and comparing the voltage of submodules, then changing the working states of real submodules, the voltages of the upper/lower arm’s capacitors can be well balanced. The validity of the proposed method is verified by simulation and experimental results of five-level prototype of MMC

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Ji Yu
AU  - Mei Jun
AU  - Du Xiaozhou
AU  - Ma Tian
AU  - Zheng Jianyong
PY  - 2015/09
DA  - 2015/09
TI  - Research on Hysteresis-band Current Tracking Strategy for Modular Multilevel Converter in DG System
BT  - Proceedings of the AASRI International Conference on Industrial Electronics and Applications (2015)
PB  - Atlantis Press
SP  - 107
EP  - 110
SN  - 2352-5401
UR  - https://doi.org/10.2991/iea-15.2015.28
DO  - 10.2991/iea-15.2015.28
ID  - Yu2015/09
ER  -