Uma metodologia fundamentada na distância aparente e grandezas incrementais para a localização de faltas de alta impedância em redes aéreas de distribuição com geração distribuída

Abstract

This work introduces an innovative methodology for locating High-Impedance Faults (HIF) in overhead distribution networks with Distributed Generation (DG). The proposed method uses synchronized voltage and current measurements from strategically placed meters, focusing on an incremental quantity-based distance approach. Its theoretical foundation lies in applying Thévenin’s theorem and the superposition principle, effectively separating faultinduced contributions from pre-fault conditions. Validated through simulations including various levels of DG, noise, and load levels, the methodology demonstrates robustness, accurately locating faults with minimal error margins even under noise and load variations. It can distinguish main branch faults from lateral branch occurrences, reducing multiple estimate errors. The work explores selective implementation feasibility, establishing location zones, especially in critical segments, aiming to balance fault location precision and system implementation costs. The results show the method not only enhances HIF location accuracy but also provides a flexible framework adaptable to network configuration, ensuring targeted coverage and resource allocation for critical areas within the power distribution network.