A LVRT Control Strategy Based on the Improved Second Order Generalized Integral PLL

DOI

10.2991/amms-17.2017.14How to use a DOI?

Keywords

phase-locked loop; second order generalized integrator; low voltage ride through

Abstract

Facing the unbalance drop of three-phase grid voltage, jumping frequency and other complex working conditions, the accuracy and dynamic response of phase-locked loop (PLL) have become the important performance indicators of the photovoltaic grid-connected inverter. Aiming at the problem that the low accuracy of SOGI unit in the traditional double-order generalized integral phase-locked loop (DSOGI-PLL), when the frequency variation of the grid is happened. Thus, the paper proposes a compensation and improved algorithm that the stability of output signal is ensured by the stationary input frequency and the extra compensation. Finally, simulation and experiment show that the proposed PLL system can filter out the harmonic part of the grid voltage, but also, lock the phase fast and accurately. And it ensures that the grid-connect inverter goes through the fault. So that the PLL has strong adaptability to the grid.

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  - Hongling Lei
AU  - Chang Yang
AU  - Jianfei Li
AU  - Yunxiang Xie
PY  - 2017/11
DA  - 2017/11
TI  - A LVRT Control Strategy Based on the Improved Second Order Generalized Integral PLL
BT  - Proceedings of the 2017 International Conference on Applied Mathematics, Modeling and Simulation (AMMS 2017)
PB  - Atlantis Press
SP  - 66
EP  - 69
SN  - 1951-6851
UR  - https://doi.org/10.2991/amms-17.2017.14
DO  - 10.2991/amms-17.2017.14
ID  - Lei2017/11
ER  -