Novel Method of Low and High Impedance Fault Detection in LVDC Microgrids

Despite AC classical systems, protection of DC system is a real challenging task. The method of high and low fault detection for LVDC microgrids using fuzzy interface systems is presented in this paper. Based on specific rules and conditions, fuzzy inference systems try to make the most appropriate decision for each system state as quickly as possible. The aim of this paper is the fast detection of low and high impedance faults in LVDC microgrids, regardless of the type and amplitude of fault current and the power supply capacity, by instantaneous current monitoring. So, that the entire system would not experience an outage, while the faulted segment is isolated. To do so, an LVDC ring-bus microgrid is used that utilizes solid-state bidirectional switches along with master and slave controllers.

Despite AC classical systems, protection of DC system is a real challenging task. The method of high and low fault detection for LVDC microgrids using fuzzy interface systems is presented in this paper. Based on specific rules and conditions, fuzzy inference systems try to make the most appropriate decision for each system state as quickly as possible. The aim of this paper is the fast detection of low and high impedance faults in LVDC microgrids, regardless of the type and amplitude of fault current and the power supply capacity, by instantaneous current monitoring. So, that the entire system would not experience an outage, while the faulted segment is isolated. To do so, an LVDC ring-bus microgrid is used that utilizes solid-state bidirectional switches along with master and slave controllers.