Techno-economic Analysis of Non-linear DG Penetration in Radial Distribution Systems

  • Narinder Kumar NIT, Kurukshetra, Haryana
  • Ashwani Kumar NIT, Kurukshetra, Haryana
Keywords: Distributed Generation, Harmonic distortion, Shunt Capacitor, Radial Distribution System, Voltage Harmonics, Total Harmonic Distortion

Abstract

Increasing penetration of Distributed Generation (DG) in recent years has presented new challenges for planning and optimal operation of integrated distribution systems. In this scenario, harmonic distortions caused by non-linear DG operation in the distribution networks have further added to the complexities of regulating such interconnected systems. In this article, a comprehensive analysis of unbalanced radial distribution systems (RDS) integrated with non-linear DG has been attempted. The analytical assessment has been carried out by considering various voltage harmonics in non-linear DG in the presence of shunt capacitors in the radial distribution systems. Results are obtained for Total Harmonic Distortion (THD) of voltage and current at various buses of the RDS, along with harmonic power profile. An economic assessment of annual energy loss in the presence of non-linear DG has also been attempted. The proposed method is tested on two IEEE radial distribution feeders interconnected with non-linear DG. Results show that the presence of even acceptable level of voltage harmonics in non-linear DG can cause severe harmonic amplification in the entire network, consequently leading to increased energy losses for certain harmonic orders.

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Author Biographies

Narinder Kumar, NIT, Kurukshetra, Haryana

Narinder Kumar, corresponding author, received his M.E. degree from National Institute of Technical Teachers’ Training and Research, Panjab University, Chandigarh in 2008 and is presently pursuing PhD from NIT, Kurukshetra, Haryana, PIN-136119, INDIA. His research interests include Power Quality and harmonic pricing issues. E-mail: narindersadana@gmail.com Phone No.: +91 9915152946

Ashwani Kumar, NIT, Kurukshetra, Haryana

Ashwani Kumar received his PhD degree from IIT, Kanpur in 2003 and is presently a Professor of Electrical Engineering at NIT, Kurukshetra, Haryana, PIN-136119, INDIA. He is engaged in research activities in the areas of transmission pricing issues in restructured markets in India, Distributed Generation, Power Quality and Demand Side Management. He has authored many research papers in peer-reviewed international journals of repute and also successfully completed a research project at Tennessee Technological University, Cookeville, USA from Jan. 2008-June 2008 during his post-doc programme. E-mail address: ashwani.k.sharma@nitkkr.ac.in Phone No.: +91 9416366091

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