Article history: Received: 22.10.2014. Received in revised form: 13.12.2015. Accepted: 14.12.2015. The connection of distributed sources and their impact on distribution grid has been the subject of intensive research in the last two decades. Creating a favorable environment for the production of electrical energy from renewable energy sources in many countries around the world made an evident ...

Inverter Based Generators (IBGs) have been increasing significantly in power systems. Due to the demanding thermal rating of Power Electronics (PE), their contribution system Short Circuit Current (SCC) is much less than that from conventional Synchronous (SGs) thus reducing strength and posing challenges protection stability. This paper proposes a Unit Commitment (UC) model with SCC constraint...

Distributed generations can be divided into traditional synchronous generators and inverter interfaced distributed (IIDG) according to their different operation mode. While the fault characteristics of IIDG is from Generators, in-depth analysis on output are foundation micro grid protection. The mathematical models under P/Q V/F control strategy discussed. After simplifying its model, studied u...

This study proposes a new islanding detection method for use of grid-interconnected distributed generators (DG). The method is based on two indices: the rate of change of frequency (ROCOF) and the rate of change of voltage (ROCOV). When a DG is grid-interconnected, the ROCOF and ROCOV are lower than the threshold value. In contrast, as an islanding occurs, the ROCOF or ROCOV become much higher ...

The impact of fixed speed squirrel cage type as well as variable speed doubly fed induction generators (DFIG) on dynamic performance of a multimachine power system has been investigated. Detailed models of the various components have been presented and the integration of asynchronous and synchronous generators has been carried out through a rotor angle based transform. Simulation studies carrie...

This paper reports the performance of series- and shunt-connected self-excited reluctance generators (SERG). In addition to two stator connections, an analysis was carried out on rotor configurations (with without a cage) combination resulting in four different generator topologies. The loss load transient characteristics each configuration were studied for pure resistive R-L loads. It is shown...