Low Voltage Ride through Enhancement Using Grey Wolf Optimizer to Reduce Overshoot Current in the Grid-Connected PV System

In today’s world, the DG should not be disconnected in the event of a power outage but should instead remain linked to the grid and supported by reactive power. This can be accomplished by implementing the low voltage ride through (LVRT) with a proportional integral (PI) controller. As a result, the...

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Bibliographic Details
Published in:Mathematical problems in engineering 2022-05, Vol.2022, p.1-12
Main Authors: Jaalam, N., Ahmad, A.Z., Khalid, A. M. A., Abdullah, R., Saad, N. M., Ghani, S. A., Muhammad, L. N.
Format: Article
Language:English
Subjects:
Control algorithms
Controllers
Fuzzy logic
Low voltage
Mathematical problems
Neural networks
Proportional integral
Reactive power
Voltage sags
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Summary:In today’s world, the DG should not be disconnected in the event of a power outage but should instead remain linked to the grid and supported by reactive power. This can be accomplished by implementing the low voltage ride through (LVRT) with a proportional integral (PI) controller. As a result, the voltage profile can be enhanced. The PI controller, on the other hand, has drawbacks in that setting the gain takes a long time and results in an overshoot current on the grid, which could trigger the protection relay. To address this issue, this paper proposes employing a grey-wolf optimizer (GWO) to enhance the LVRT in a 5 MW three-phase grid-connected PV system. A MATLAB simulation was carried out then under a three-phase fault and load disturbance to verify the efficiency. It is found that, even with a 70% voltage sag, the PV system can remain connected to the electrical grid while minimising overshoot current on the grid side.
ISSN:1024-123X
1563-5147
DOI:10.1155/2022/3917775