This paper presents a new fault location (FL) method for medium voltage (MV) networks operating with the neutral solidly grounded or grounded across a small resistance. The FL algorithm is based on the impedance measurement principle and uses the recorded three-phase voltage and current signals as well as the network impedance for the particular symmetrical components – pre-calculated after eac...

Photovoltaic (PV) ground faults have caused many fires in the U.S. and around the world. Recently, the American PV industry has discovered a blind spot in fuse-based ground fault detection that has spurred a transition to a number of alternatives traditionally used in European markets. This paper investigates the repeatability of one of these methods, residual current detection (RCD), using his...

A fault protection and location method for a dc bus micro grid system is presented in this paper. If a fault causes the dc bus to de-energize completely, it makes locating faults very difficult. The proposed algorithm can be implemented and executed by an intelligent electrical device for an individual node. The bus was segmented into overlapping nodes and links with circuit breakers (CBs) to i...

The characteristics of the distance relay are devised based on online and fault impedance. uses information to react expected state; however, integrating grid with a unified power flow controller (UPFC) might stop from fault-triggered operations, requiring altered characteristics. Building tripping parameters among critical challenges that must be addressed for transmission line relays because ...

The prologue of new High Voltage (HV) transmission mains into the community necessitates earthing design to ensure safety compliance of the system. Concrete poles are widely used within HV transmission mains; many retired transmission mains with timber poles are being replaced with concrete ones, green transmission mains are deploying concrete poles. The earthing arrangement of the concrete pol...

this paper presents a fault location technique for transmission lines with minimum current measurement. this algorithm investigates proper current ratios for fault location problem based on thevenin theory in faulty power networks and calculation of short circuit currents in each branch. these current ratios are extracted regarding lowest sensitivity on thevenin impedance variations of the netw...