Improvement of Line Stability Indices with Solar Photovoltaic Integration in Power System Network Improvement of Line Stability Indices with Solar Photovoltaic Integration in Power System Network

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Published: Oct 26, 2025
DOI: https://doi.org/10.37936/ecti-eec.2525233.259359
Keywords:
Critical line Indices Load flow Stability Solar PV generation

Main Article Content

Santosh Kumar Gupta
-
Vikash Kumar
Department of EEE, Rashtrakavi Ramdhari Singh Dinkar College of Engineering, Begusarai, Bihar - 851134
Kanchan Bala
SHAHZAD AHSAN
Department of Electrical Engineering, Muzaffarpur Institute of Technology, Muzaffarpur, Bihar - 842003
Ashwini Tiwari
Department of Civil Engineering, Rajkiya Engineering College, Mainpuri, Uttar Pradesh - 205119
Zafar Ayub Ansari
Dhananjay Kumar
Ashish Ranjan
Arjun Kumar

Abstract

The stability of power systems is challenged by the rise of renewable energy sources, fast load changes, and increased consumption. The voltage stability index (VSI) is crucial for assessing power supply stability and triggering responses to voltage instability. This paper uses fast voltage stability index (FVSI), line stability factor (Lqp), and line stability index (Lmn) to evaluate the IEEE 14-bus and 118-bus systems. With solar photovoltaic generator (SPVG) integration at the most critical bus, these indices assess system stability under nominal and varied reactive power conditions. The main goal of the paper is to mitigate critical line severity by integrating PV systems, using Newton-Raphson load flow analysis in PSAT/MATLAB. Results show significant improvements in line indices with SPVG, notably reducing critical line
severity for the IEEE 14-bus (lines 5-1) and 118-bus (lines 44-43) systems.

Article Details

How to Cite
Gupta, S. K., Kumar, V. ., Bala, K. ., SHAHZAD AHSAN, Ashwini Tiwari, Ayub Ansari, Z. ., Kumar, D. ., Ranjan, A. ., & Kumar, A. . (2025). Improvement of Line Stability Indices with Solar Photovoltaic Integration in Power System Network: Improvement of Line Stability Indices with Solar Photovoltaic Integration in Power System Network. ECTI Transactions on Electrical Engineering, Electronics, and Communications, 23(3). https://doi.org/10.37936/ecti-eec.2525233.259359
Issue
Vol. 23 No. 3 (2025): Regular Issue (October 2025)
Section
Electrical Power Systems
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