Analysis of Faulted Overhead Distribution Systems Using Linearization Method

Abstract

Faulted overhead distribution systems can be analyzed for fault diagnosis and protection planning using MATLAB/Simulink; however, for large-scale systems or detailed fault modeling, this approach may require significant computational time. In this paper, we propose a novel algorithm based on linearization techniques to expedite fault analysis. The algorithm modifies the system's admittance matrix, incorporating fault type, location, and admittance values, alongside models for neutral and ground conductors, distribution transformers, and loads represented as R–L elements. By linearizing the system equations, the proposed method enables faster analysis while maintaining accuracy under complex fault scenarios, such as simultaneous or asymmetrical faults. Comparative evaluations with MATLAB/Simulink demonstrate the algorithm's efficiency in reducing computation time for fault analysis.