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research-article

Modeling and Control of Grid-Connected Photovoltaic Power Plant with Fault Ride-Through Capability

[+] Author and Article Information
Ali Al-Shetwi

Faculty of Electrical and Electronic Engineering, University Malaysia Pahang (UMP), 26600 Pekan, Pahang, Malaysia
alialshetwi@yahoo.com

Muhamad Zahim Sujod

Faculty of Electrical and Electronic Engineering, University Malaysia Pahang (UMP), 26600 Pekan, Pahang, Malaysia
zahim@ump.edu.my

1Corresponding author.

ASME doi:10.1115/1.4038591 History: Received May 28, 2017; Revised November 14, 2017

Abstract

High penetration of photovoltaic (PV) power plants to the grid requires reliable PV generation system by achieving fault-ride through (FRT) requirements. In order to meet these requirements, there are two major issues should be addressed to keep the inverter connected during grid fault. The two issues are the ac over-current and dc-link over-voltage that may cause disconnection or damage to the grid inverter. In this paper, the control of single-stage PV power plant inverter is developed to address these issues and enhance FRT capability. The proposed control scheme introduces the dc-chopper brake circuit and current limiter to protect the inverter and ride-through the fault smoothly with no perceptible overcompensation. A case study of a 1.5-MW PV power-plant-connected into Malaysian grid simulated in Simulink is utilized to explain the proposed control. The simulation results presented demonstrate the effectiveness of the overall proposed control strategy to ride-through different types of faults and helping to ensure the safety of the system equipment.

Copyright (c) 2017 by ASME
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