Open AccessGround Fault Protection methods for Distribution Systems
Author(s) -
Hugo Ricardo dos Santos Tavares,
Teresa Nogueira
Publication year - 2017
Publication title -
neutro à terra
Language(s) - English
Resource type - Journals
eISSN - 1647-5496
pISSN - 1647-5488
DOI - 10.26537/neutroaterra.v0i17.455
Subject(s) - ground , earthing system , electrical impedance , electromagnetic coil , fault (geology) , electrical engineering , electric power system , voltage , reliability engineering , power (physics) , high impedance , engineering , computer science , electronic engineering , physics , quantum mechanics , seismology , geology
The system grounding method option has a direct influence on the overall performance of the entire medium voltage network as well as on the ground fault current magnitude. For any kind of grounding systems: ungrounded system, solidly and low impedance grounded and resonant grounded, we can find advantages and disadvantages. A thorough study is necessary to choose the most appropriate grounding protection system. The power distribution utilities justify their choices based on economic and technical criteria, according to the specific characteristics of each distribution network. In this paper we present a medium voltage Portuguese substation case study and a study of neutral system with Petersen coil, isolated neutral and impedance grounded.