Research on the Stability of Multi PV Inverters Connected to Weak Grid Based on Impedance Analysis
Authors
Qinghao Wang, Dewu Ye, Bo Liu, Yi Qu, Jing Liu, Yi Wang, Guobin Liu, Yuanlin Song, Hui Chen, Junping Quo
Corresponding Author
Qinghao Wang
Available Online June 2018.
- DOI
- 10.2991/icmmct-18.2018.47How to use a DOI?
- Keywords
- PV inverter, equivalent impedance, phase locked loop design, power system stability
- Abstract
In paralleled grid connected PV inverters system, when the design of the inverter control system is connected with the weak grid, the control performance will become poor, and even the operation is not stable. In this paper, a method of impedance analysis is presented, and the equivalent impedance of inverter is derived by using the small signal model of the inverter, which is used to analyze the stability of inverter parallel system. And this paper proposes that system can be stabilized by changing the phase locked loop design of the inverter. Simulation results verify the validity and feasibility of the theoretical analysis and the proposed method.
- Copyright
- © 2018, 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 - Qinghao Wang AU - Dewu Ye AU - Bo Liu AU - Yi Qu AU - Jing Liu AU - Yi Wang AU - Guobin Liu AU - Yuanlin Song AU - Hui Chen AU - Junping Quo PY - 2018/06 DA - 2018/06 TI - Research on the Stability of Multi PV Inverters Connected to Weak Grid Based on Impedance Analysis BT - Proceedings of the 2018 6th International Conference on Machinery, Materials and Computing Technology (ICMMCT 2018) PB - Atlantis Press SP - 234 EP - 238 SN - 2352-5401 UR - https://doi.org/10.2991/icmmct-18.2018.47 DO - 10.2991/icmmct-18.2018.47 ID - Wang2018/06 ER -