Performance Study of Distributed Generation System in Grid Connected/Isolated Modes

  • Sanjeev K Nayak Department of Electrical and Electronics Engineering, at Nitte Meensakashi Institute of Technology, Bangalore
  • D.N. Gaonkar Department of Electrical Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore, India
Keywords: 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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Author Biographies

Sanjeev K Nayak, Department of Electrical and Electronics Engineering, at Nitte Meensakashi Institute of Technology, Bangalore

Sanjeev K Nayak (corresponding author) received his M Tech degree from UBDT College of Engineering Davengere, Kuvempu University Shimoga Karnataka, in the year 2007. He is working as a faculty in the Department of Electrical and Electronics Engineering, at Nitte Meensakashi Institute of Technology, Bangalore for duration of three years. Currently he is pursuing his Ph.D. research work in the Department of Electrical and Electronics Engineering at National Institute of Technology Karnataka Surathkal. His areas of research interests are Distributed Generation-Microturbine, Fuel cell and Power Quality. He published the few journal articles and technical papers in national and international conference, in India, Saudi Arabia and Thailand. Email: nayaksanjeev82@gmail.com.

D.N. Gaonkar, Department of Electrical Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore, India

D.N. Gaonkar received his Ph.D. from the Indian Institute of Technology Roorkee, India, in 2008. He was a visiting research scholar at the University of Saskatchewan Canada in 2008. He has edited and written a chapter in the book titled DISTRIBUTED GENERATION, published by INTECH publication Austria. He has published many papers in international journals and conferences. He is an Assistant Professor in the Department of Electrical Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore, India. His research areas of interest are Power System Operation and Control, Power Electronics and Distributed Generation Systems. Email: dngaonkar@gmail.com.

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