A Proportional + Multi-Resonant Current Controller for Grid-connected Inverters under Unbalanced Grid Voltage
- 10.2991/iwmecs-15.2015.104How to use a DOI?
- grid voltage unbalance and distortion; proportion multi-resonant (PMR); second order generalized integrator (SOGI); zero current error control
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.
- © 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/).
Cite this article
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 -