Performance Study of Distributed Generation System in Grid Connected/Isolated Modes
DOI:
https://doi.org/10.13052/dgaej2156-3306.2914Keywords:
Distributed generation, Microturbine, Permanent magnet synchronous machine, Power electronics interface.Abstract
The Microturbine Generations (MTG) system is becoming one
of the promising sources of Distributed Generation (DG) due to their
fuel flexibility, reliability and power quality. Thus, the accurate model
of MTG system is required for the grid connected operation and its
perturbations. This article presents the performance study of MTG
based DG system in grid connected, islanding and re-closed modes of
operation. The developed model of MTG system includes a microturbine
as prime mover, Permanent Magnet Synchronous Machine (PMSM) and
power electronics interacting circuit along with control schemes. The
MTG system uses the turbine speed to control the microturbine output
power in comparison with the reference speed and shaft speed. The
generated AC power is converted to DC using a passive rectifier and this
DC power is inverted back to AC power to mach grid frequency. The DC
link power is delivered to the grid, islanding load using a three phase
voltage source inverter with Pulse Width Modulation (PWM) techniques.
While delivering the DC link power to the grid and islanding load, the
respective Active, Reactive Power (PQ) and Voltage Frequency (VF)
control strategies are used for inverter operation. The detailed model
of MTG system along with control schemes is developed using Matlab/
Simulink environment and the simulation results show the performance
of MTG based DG system. From the simulation study, it is ascertained
that, the developed model of MTG system can delivers the power to
grid and isolated load significantly, by shifting the converter controller
manually.
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