The main aim of this paper is building a small micro grid test bed system with few sources, and loads various types lumped resistive (R), capacitive (C) inductive (L) elements. Before the advent electric smart every load facilitated its own electromagnetic. Slowly an advancement protection numerical relays came into existence. Because in communication between central computer possible, coordina...

1214304-8585-IJET-IJENS © August 2012 IJENS I J E N S Abstract— In this paper we present the design of an Adaptive overcurrent protection for Distribution Power Systems with penetration of Distributed Generation, based in a proposed methodology. The methodology takes into account typical protection schemes, normative, general protection requirements, protections coordination and distributed gen...

Analysis of cascading outages in power systems is important for understanding why large blackouts emerge and how to prevent them. Cascading outages are complex dynamics of power systems, and one cause of them is the interaction between swing dynamics of synchronous machines and protection operation of relays and circuit breakers. This paper uses hybrid dynamical systems as a mathematical model ...

When disturbances occur in power grid, monitoring, control and protection systems are required to stop the grid degradation, restore it to a normal state, and hence minimize their effects. However, in wide area power grid resulting from large extension and interconnection with neighbor grids, classical systems based on local independent measurements and decisions are not able to consider the ov...

In emergency and abnormal conditions, a power system operator has to deal with a large amount of data and apply most appropriate remedial actions. However, due to emotional and psychological stress, an operator may not be able to adequately respond to critical conditions and make correct decisions. Mistakes can damage very expensive power system equipment or worse lead to major emergencies and ...

In this paper, we investigate an event based protection scheme for dc power system which includes hybrid energy sources. The proposed protection scheme requires less time when compared with other methods. In this method, fault can be isolated and efficiency can be improved. The performance of protection scheme was evaluated under the transmission lines.

As one of the solution of the increase problem of the fault current in a power system, the superconducting fault current limiter (SFCL) has been noticed as the attractive device because it has no power loss in a normal time and can limit the fault current rapidly without additional device to detect the fault current. However, the introduction of the SFCL in a power distribution system affects t...