A novel method for determination of maximum penetration of distributed generation in radial distribution network

ABSTRACT

The several benefits of distributed generation (DG) have encouraged the utility companies for the integration of different DG technologies in the radial distribution network. The large penetration of DG units has significantly influenced the voltage stability of the radial distribution network. In this paper, in order to determine the penetration level of DGs in the radial distribution network, a static voltage stability index (VSI)-based method has been explored for the identification of optimal locations at various penetration levels. The proposed method is compared with modal analysis-based optimal placement method at the various penetration levels of DGs. For the identification of the maximum penetration level (PL) of DGs in the radial distribution network, the IEEE 33 and 69 node radial distribution network with various DG penetration levels, i.e. 20%, 40% and 60% have been utilised in this study. The results show that the placement of DGs at nodes sensitive to voltage collapse has increased the voltage stability margins (VSM). It is also observed that the DGs penetration level beyond a certain limit have an adverse effect on static voltage stability margin and power losses of the network.

KEYWORDS:

• Modal analysis
• P-V curves
• distributed generation
• voltage stability margin
• voltage stability index

Disclosure of potential conflicts of interest

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

Additional information

Notes on contributors

Mahiraj Singh Rawat

Dr. Mahiraj Singh Rawatreceived the B.Tech. degree in Electrical & Electronics Engineering from Uttar Pradesh Technical University, Lucknow, Uttar Pradesh, India,  M.Tech. degree in Electrical Engineering with specialization in Power System from National Institute of Technology, Hamirpur, Himanchal Pradesh, India and Ph.D. in Electrical Engineering from National Institute of Technology,  Kurukshetra, Haryana, India in 2007, 2011 and 2019 respectively. He is currently working as Assistant Professor in Department of Electrical Engineering, National Institute of Technology, Uttarakhand. His current research interest are power system stability and renewable energy integration issues in power system, integration of FACTS devices, and distribution system analysis.

Shelly Vadhera

Dr. Shelly Vadhera received the B.E. degree in Electrical Engineering from Thapar Institute of Engineering & Technology, Patiala, India; the M.Tech. degree in Power Systems; and the Ph.D. degrees in Electrical Engineering both from the National Institute of Technology, Kurukshetra, India. She is currently working as an Associate Professor in Department of Electrical Engineering, National Institute of Technology, Kurukshetra, Haryana, India. Her current research area focuses on renewable energy, power systems, high-voltage engineering and artificial intelligence.