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A low-voltage ride-through strategy using mixed potential function for three-phase grid-connected PV systems

Hao Wen, Meghdad Fazeli Orcid Logo

Electric Power Systems Research, Volume: 173, Pages: 271 - 280

Swansea University Author: Meghdad Fazeli Orcid Logo

Abstract

This paper presents a new control strategy for low-voltage ride-through for 3-phase grid-connected photovoltaic systems. The proposed fault ride through control algorithm, which is designed based on mixed potential function, can protect the inverter from overcurrent failure under both symmetric and...

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Published in: Electric Power Systems Research
ISSN: 0378-7796
Published: 2019
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa50131
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Abstract: This paper presents a new control strategy for low-voltage ride-through for 3-phase grid-connected photovoltaic systems. The proposed fault ride through control algorithm, which is designed based on mixed potential function, can protect the inverter from overcurrent failure under both symmetric and asymmetric faults, reduce the double frequency oscillation and provides reactive power support by applying a voltage compensation unit. With the proposed method, the inverter can also inject sinusoidal current during asymmetric faults. The method does not require a hard switch to switch from the Maximum Power Point Tracking (MPPT) to a non-MPPT algorithm, which ensures a smooth transition.
Keywords: Current control, Fault-ride-through, Photovoltaic, Micro-grids, Large-signal analysis
College: College of Engineering
Start Page: 271
End Page: 280