Seminar Details

Seminar Title
::
Control Strategies for Standalone and Grid-Connected Microgrid with Renewable Energy Sources and Energy Storage Systems
Seminar Type
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Registration Seminar
Department
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Electrical Engineering
Speaker Type
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Student
Speaker Name
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Gurugubelli Vikash (Roll No. 518EE1006, Supervisor: Prof. Arnab Ghosh and Prof. Shubhobrata Rudra)
Date  &  Time
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18 Sep 2020  04:00 PM
Venue
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Online mode (Through MS Team, Code: r59wqad)
Contact
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Prof. Ananyo Sengupta, Email : ananyo@nitrkl.ac.in, Phone : +91-661-246 2446
Abstract
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In recent times, the renewable energy sources (RES) have been potential alternatives for the conventional generation systems connected in the grid. The power electronic inverters are the principal media of interface for connecting the RES to the utility grid system. This work is primarily focused on the different control strategies (Droop control, Virtual Synchronous Machine (VSM) and Virtual Oscillator Control (VOC)) for the parallel operated inverters in a standalone Microgrid (MG). Droop control has no inertia such that the transient response of this controller is not significant. VSM imitates not only the droop characteristics of Synchronous Machines but also the swing equation. Therefore, VSM has a remarkable difference in the dynamic performance of the system. The VOC employs a decentralized control strategy for islanded micro grids, where inverters are regulated to mimic the dynamics of nonlinear oscillators. The VOC regulates the amplitude and frequency of the inverter output voltage. Consequently, the inverter output voltages are synchronized. This technique ensures to share the load power proportional to their power ratings and there is no communication between the inverters. In droop and VSM the feedback signals such as voltage and current are measured to calculate the averaged real and reactive powers. However, the VOC works on instantaneous feedback signals. The aforementioned control techniques introduced in the system of two 3-phase inverters are operated in islanded mode. The steady-state performance of the system with the aforementioned controllers is almost similar, but the dynamic performance of the system differs remarkably. The simulation results for a system of inverters with VOC gives a better performance compared to droop and VSM control. Finally, particle swarm optimization (PSO) is used for the selection of VOC parameters. The PSO based VOC shows the better performance compared to VOC control strategy.