Frequency Stability of a Wind-based Energy System by Virtual Inertia Controller of an Inverter Connected to Grid

Abstract

The dwindling inertia of the power system due to the incorporation of renewable energy sources is a vital concern. This is the genesis of the frequency volatility in a system. A non-linear controller formulated on fuzzy logic has been developed for mimicking the operation of a synchronous generator. This non-linear controller is proficient in utilizing the energy present in the rotating blades of the wind turbine and nourishing the requisite quantity of inertia in the system ensuring the alleviation of the frequency variation issues. The system’s improved behavior is evaluated with this innovative controller in comparison with a traditional PD/PID controller for various transients such as sudden addition, deletion of large loads, and faults.

KEYWORDS:

• DFIG
• Frequency nadir
• RESs
• RoCoF
• Virtual inertia
• Virtual synchronous generator
• VSCs
• Wind turbines
• Zenith

DISCLOSURE STATEMENT

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

K. Harisha

K Harisha is a faculty at Govt CPC Polytechnic, Mysuru, Karnataka, India, in the Department of Electrical and Electronics Engineering. He received his bachelor's degree in electrical & electronics engineering from NIE, University of Mysore in 1996. He did MTech in power systems from NIE, Vesvesvaraya Technological University, Belagavi, India in 2021. His publications include one paper in journal and one in conference. His interested research areas include non-linear controllers for system stability issues, integration of wind sources, power electronics, and contingency analysis. Corresponding author. Email: [email protected]

V. N. Jayasankar

VN Jayasankar is currently working as an assistant professor at The National Institute of Engineering, Mysuru, Karnataka, India, in the Department of Electrical and Electronics Engineering. He received his BTech degree in electrical & electronics engineering from Kannur University, India, in 2010, his MTech degree in power systems from National Institute of Technology, Calicut, India, in 2012, and his PhD from the National Institute of Technology, Surathkal, Karnataka, India, in 2019. His publications include 15 papers in international journals, conferences, and book chapters. His areas of interest include renewable energy, power electronics, and power quality. His research activities were mainly focused on the “Grid connection of wind-solar hybrid renewable energy system”. Email: [email protected]