Passivity-based Control of NPC Three-level Inverter

DOI

10.2991/ifmca-16.2017.126How to use a DOI?

Keywords

NPC; Balance of dc capacitor voltage; SPWM strategy; passivity theory.

Abstract

Unbalance of dc capacitor voltage is a key technical problem of NPC inverter. Through establishing the dc capacitor voltage balancing mathematical model of NPC three-level inverter, it can be proved that the NPC three-level inverter is a Passivity nonlinear system. By controlling the total charge of point injection is zero in a sampling period, and considering the Passivity dissipation characteristics of the nonlinear system, this paper calculated current of middle line and built up the passivity-based control model, and then kept the balance between voltages of dc capacitors, realized the low frequency current and dried the load transformer based on this. This control algorithm can achieve balance of dc voltages and output current at the same time, and the validity and feasibility of this control strategy is verified by simulation results, and very good effect has been proved by a practical engineering of 750kVA, NPC Three-level inverter. Based on this, a new idea of solving the unbalance of dc capacitor of diode clamped multi-level inverter is provided by this study.

Copyright

© 2017, 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  - Shilan Shen
AU  - Qiu Hong
AU  - Xiaofan Zhu
PY  - 2017/03
DA  - 2017/03
TI  - Passivity-based Control of NPC Three-level Inverter
BT  - Proceedings of the 2016 International Forum on Mechanical, Control and Automation (IFMCA 2016)
PB  - Atlantis Press
SP  - 810
EP  - 814
SN  - 2352-5401
UR  - https://doi.org/10.2991/ifmca-16.2017.126
DO  - 10.2991/ifmca-16.2017.126
ID  - Shen2017/03
ER  -