Abstract: Abstract of Talk: With the increasing integration of renewable energy sources (RESs), maintaining grid power quality and stability while maximizing energy extraction remains a challenge in microgrids during grid disturbances. To address these challenges, a suitable microgrid topology with an effective control scheme is essential for achieving multifunctional operation with enhanced flexibility and reliability. The first work presents a novel application of the dual voltage source inverter (DVSI) topology to facilitate low voltage ride-through under voltage sag conditions. A power management algorithm is proposed to maintain power balance at the PCC during input and output disturbances. The second work proposes a unified voltage ride-through scheme for a DVSI-fed microgrid system to ride through unsymmetrical voltage sags and swells by regulating the PCC voltage, reducing negative-sequence voltage and active power oscillations, and maintaining phase voltages within permissible limits. The performance of the proposed control algorithms is validated through simulation and experimental studies.

In the third work, a hybrid mode of operation is presented for the DVSI, wherein the RES-fed VSI operates in grid-forming mode to regulate the system voltage and frequency, while the second inverter acts as a compensator in grid-following mode. The effectiveness of the hybrid control scheme in ensuring stable system operation is validated under various operating conditions, including grid-connected, islanded, and faulted grid conditions.

Event Details
Title: Voltage Ride-Through Strategy for Grid-Interfaced Dual Voltage Source Inverter (PhD Viva Voce)
Date: June 10, 2026 at 10:00 AM
Venue: Google Meet (https://meet.google.com/eya-adde-wda)
Speaker: Ms. Nimitha Muraleedharan (EE22D024)
Guide: Dr. Mahesh Kumar
Type: PHD seminar

Updated: