Voltage and Frequency Stability Assessment for Western Section of Integrated Nepal Power System
Authors: Tanus Bikram Malla, Abhinav Bhattarai, Samundra Gurung, Bishal Silwal, Ashish Shrestha, Swaechchha Dahal, Bikash Kafle, Brijesh Adhikary
Abstract—Because of the rapid expansion of the grid and the inclusion of distributed energy resources such as solar PV and micro-hydro plants, the Integrated Nepal Power System (INPS) is being complex day by day and facing numerous challenges. Power system stability is one of the major concerns that this grid could face shortly. In this paper, the authors investigate the stability issues of INPS in terms of voltage and frequency. The Western Section of the INPS is taken as the case study and investigated for the stability assessment. While investigation, the PV and QV curves are made, and PV and QV margin is determined for two cases: (a) base condition, and (b) N-1 contingency condition. The time domain simulation is performed for evaluating the pre-fault and post-fault voltage. The frequency stability assessment is also done by calculating NADIR, over frequency, and rate of change of frequency (ROCOF).
Keywords- DIgSILENT Power Factory, Power System Dynamics, Power System Stability
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Published In: International Conference on Role of Energy for Sustainable Social Development (RESSD-2022)
Date of Conference: 8th-9th August 2022
Conference Location: Bhaktapur, Nepal
Publisher: IEEE Power and Energy Society Nepal Chapter
Cite the paper as:
T. B. Malla, A. Bhattarai, S. Gurung, B. Silwal, A. Shrestha, S. Dahal, B. Kafle, B. Adhikary, “Voltage and Frequency Stability Assessment for Western Section of Integrated Nepal Power System”, International Conference on Role of Energy for Sustainable Social Development, 8th-9th August 2022, Bhaktapur, Nepal