TY - JOUR
T1 - Multi-Functional PV Inverter With Low Voltage Ride-Through and Constant Power Output
AU - Talha, Muhammad
AU - Raihan, Siti Rohani Sheikh
AU - Rahim, Nasrudin Abd
AU - Akhtar, Muhammad Naveed
AU - Butt, Osama Majeed
AU - Hussain, Muhammad
N1 - Funding Information:
This work was supported in part by the UM Power Energy Dedicated Advanced Center (UMPEDAC), and the Fundamental Research Grant Scheme (FRGS) by the Ministry of Higher Education Malaysia under Grant FP034-2020.
Publisher Copyright:
© 2022 IEEE.
PY - 2022/7
Y1 - 2022/7
N2 - Renewable photovoltaic (PV) energy is a primary contributor to sustainable power generation in microgrids. However, PV grid-tied generators remain functional as long as the grid voltage and the input PV source remain normal. Abnormal conditions like transient grid sags or solar irradiation flickering can make the grid-tied inverter go offline. Simultaneous shut down of PV generators residing in the distribution grid may lead to an overall grid instability or outage. Therefore, PV generators must be equipped with fault-ride-through mechanisms in order to remain connected and operational during faults. This paper presents a PV-inverter with low-voltage-ride-through (LVRT) and low-irradiation (LR) compensation to avoid grid flickers. The single-phase inverter rides through the voltage sags while injecting reactive power into the grid. The proposed control strategy ensures a steady DC-link voltage and remains connected to the grid during AC-side low voltage and DC-side low-irradiation faults. Unlike other PV inverters, the controller maintains the maximum-power-point-tracking (MPPT) in all conditions. LVRT, constant power output, and robust MPPT are the noticeable features of the proposed system. Frequency analysis, simulations, and a laboratory prototype validate the proposed control strategy.
AB - Renewable photovoltaic (PV) energy is a primary contributor to sustainable power generation in microgrids. However, PV grid-tied generators remain functional as long as the grid voltage and the input PV source remain normal. Abnormal conditions like transient grid sags or solar irradiation flickering can make the grid-tied inverter go offline. Simultaneous shut down of PV generators residing in the distribution grid may lead to an overall grid instability or outage. Therefore, PV generators must be equipped with fault-ride-through mechanisms in order to remain connected and operational during faults. This paper presents a PV-inverter with low-voltage-ride-through (LVRT) and low-irradiation (LR) compensation to avoid grid flickers. The single-phase inverter rides through the voltage sags while injecting reactive power into the grid. The proposed control strategy ensures a steady DC-link voltage and remains connected to the grid during AC-side low voltage and DC-side low-irradiation faults. Unlike other PV inverters, the controller maintains the maximum-power-point-tracking (MPPT) in all conditions. LVRT, constant power output, and robust MPPT are the noticeable features of the proposed system. Frequency analysis, simulations, and a laboratory prototype validate the proposed control strategy.
KW - Microgrid
KW - PV inverter
KW - LVRT
KW - MPPT
KW - constant power output
UR - http://www.scopus.com/inward/record.url?scp=85126300362&partnerID=8YFLogxK
U2 - 10.1109/ACCESS.2022.3158983
DO - 10.1109/ACCESS.2022.3158983
M3 - Article
SN - 2169-3536
VL - 10
SP - 29567
EP - 29588
JO - IEEE Access
JF - IEEE Access
ER -
