Moving Average Filter-PLL-Based Voltage and Frequency Control of Standalone WECS

Abstract

Precise and fast estimation of system frequency during distorted voltage has become the main challenge for phase locked loop (PLL) for wind energy conversion system (WECS). In this paper, moving average filter (MAF)-based PLL is proposed to solve this issue for permanent magnet synchronous generator (PMSG)-based WECS. MAF allows suitable measurement of frequency and eliminates dc offset, harmonics, and unbalance in voltage. Also scheme is able to perform harmonics reduction. Model of the proposed system for simulation is prepared in MATLAB/Simulink and its performance analysis is carried through a comparative simulation study with conventional synchronous-reference-frame (SRF) PLL, adaptive-frequency-loop PLL, type-1 PLL, and type-3 PLL. Simulation results verify that the proposed controller extracts the maximum-power from wind and stabilizes the system voltage and frequency during any variable/distorted working conditions. System performs considerably excellent during dynamic and steady-state condition.

Keywords:

• Battery energy & tarage system
• Moving average filter
• Phase lock loop
• Permanent magnet synchronous generator
• Voltage source converter
• Wind energy conversion system

Additional information

Notes on contributors

Anjana Jain

Anjana Jain is currently pursuing PhD and working as assistant professor at the Dept of Electrical and Electronics Engineering, Amrita Vishwa Vidyapeetham, Bengaluru, India. She has completed her Bachelor degree of electrical engineering in 2001 and ME in control systems in 2005 from Government Engineering College, Jabalpur, RDVV, MP, India. She has over 14 years of teaching experience. Her areas of research include renewable energy (wind power generation) and control engineering.

R. Saravanakumar

R Saravanakumar received his bachelor degree of electrical and electronics engineering in 2008 and master degree in the specialization of control and instrumentation engineering from Anna University in 2010. He received his PhD degree in control system engineering from the Department of Electrical Engineering, National Institute of Technology Karnataka, Surathkal, India in 2016. He worked as post-doctoral fellow at IIT Roorkee, India. Currently, he is working as assistant professor at the Dept of Electrical and Electronics Engineering, Amrita Vishwa Vidyapeetham, Bengaluru, India. His research interests include evolutionary computation, system dentification, and nonlinear control. E-mail: [email protected]

S. Shankar

S Shankar completed his BE in instrumentation technology in 2005 from KNS Institute of Technology, Bangalore, Karnataka, India and MTech in power electronics in 2008 from RV College of Engineering, Bangalore, Karnataka, India. He received his PhD degree from IIT Delhi, India in 2014 and currently working with Intel Technology India Pvt Ltd, Bengaluru, India. He has teaching and industry experience of over 9 years. His areas of research include renewable energy (wind, solar) and power electronics. E-mail: [email protected]