Power Quality Improvement Through Grid Integration of Renewable Energy Sources

Abstract

Renewable energy sources (RES) are rapidly gaining popularity for sustainable power generation, they being less polluting and using readily available resources. This paper presents the modelling, control, and design analysis of a single-stage, three-phase RES-based distributed generation system where the grid-interfacing inverter is controlled to perform multi-functions by simultaneously incorporating active power filter (APF) functionality. The RES is connected to the DC-side of the voltage source inverter for interfacing with the grid. The inverter is utilized as power converter to inject the power generated from the RES to the PCC and shunt APF to compensate load current harmonics, load reactive power demand, and load current imbalance under distorted supply voltage conditions. Both these functions may be accomplished either individually or simultaneously. Thus, the designed controller either regulates the power flow between the RES and the grid or works as an APF or performs both the functions simultaneously. Simulation in MATAB and experimentation using DSP is carried out to verify the operation and the control principle.

Keywords:

• Active power
• Active power filter
• Distributed generation
• Harmonics
• Reactive power
• Renewable energy source

Additional information

Notes on contributors

Gitanjali Mehta

Gitanjali Mehta received her B.Tech degree in Electronics and Communication Engineering from M. J. P. Rohilkhand University, Bareilly, India in 2003 and M.Tech degree in Power Electronics and ASIC Design from M.N.N.I.T. Allahabad, India in 2005. Currently, she is pursuing the Ph.D. degree in the field of Distributed Generation in the Department of Electrical Engineering, Indian Institute of Technology, Roorkee, India. Her research interest includes renewable and distributed generation systems and power quality control using active filters. E-mail: [email protected]

Sajjan Pal Singh

Sajjan Pal Singh received his B.Sc degree in Electrical Engineering from Aligarh Muslim University, Aligarh, India in the year 1978. He received his M.E. and Ph.D. degrees in Electrical Engineering from Indian Institute of Technology, Roorkee, India in 1980 and 1994 respectively. Currently he is Professor in the Department of Electrical Engineering, Indian Institute of Technology, Roorkee, India. His research areas include electric machines and drives, powerconverters, power quality, active filters and renewable energy systems. E-mail: [email protected]