A Proportional + Multi-Resonant Current Controller for Grid-connected Inverters under Unbalanced Grid Voltage

DOI

10.2991/iwmecs-15.2015.104How to use a DOI?

Keywords

grid voltage unbalance and distortion; proportion multi-resonant (PMR); second order generalized integrator (SOGI); zero current error control

Abstract

The traditional grid-connected inverter (GCI) has the disadvantage of high total harmonic distortion under the condition of unbalanced and distorted grid voltage. On this basis, a novel GCI control strategy is proposed in this paper. Firstly, a second order generalized integrator is built in the coordinate to realize the grid voltage phase shift 90° and separate the positive-and negative -sequence. Then, the grid current reference command of the GCI is derived. Secondly, a proportional + multi-resonant (PMR) controller, which does not need positive-and negative - sequence separation of the grid current, is employed to achieve zero current error control and improve the grid current power quality. Finally, simulation results demonstrate the effectiveness of the proposed scheme under the condition of unbalanced and distorted grid voltage.

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  - Jiajin Pan
AU  - Yancheng Liu
AU  - Qinjin Zhang
AU  - Ning Wang
PY  - 2015/10
DA  - 2015/10
TI  - A Proportional + Multi-Resonant Current Controller for Grid-connected Inverters under Unbalanced Grid Voltage
BT  - Proceedings of the 2015 2nd International Workshop on Materials Engineering and Computer Sciences
PB  - Atlantis Press
SP  - 523
EP  - 528
SN  - 2352-538X
UR  - https://doi.org/10.2991/iwmecs-15.2015.104
DO  - 10.2991/iwmecs-15.2015.104
ID  - Pan2015/10
ER  -