Microgrid properties including bidirectional power flow in feeders, fault level decrease the islanded mode, and intermittent nature of distributed generators (DGs) result malfunctioning microgrid conventional protection schemes. In present article, a scheme based on impedance is suggested for detection LV MV overhead cable distribution lines both grid-connected modes. To determine index, new eq...

Energy consumption and environmental issues have become major drivers of increasing renewable energy penetration levels. The electricity generated from sources is decentralized throughout distributed generation (DG), which located at the distribution level. However, presence DG can change system characteristics affect protection systems. Thus, this study aims to investigate impact in term its s...

The FACTS (Flexible AC Transmission Systems) devices have great use in the Electric Power System (EPS) for dynamic control of active and reactive powers system. This work deals with a comparative analysis between effects caused distance protection transmission lines (TLs) by two these devices: STATCOM (Static Synchronous Compensator) SSSC Series Compensator). objective is to verify how connecti...

This paper presents an interface system based on the Dual Active Bridge (DAB) converter for Photovoltaic (PV) arrays. Two control strategies are proposed for the DAB converter to harvest the maximum power from the PV array. The first strategy is based on a simple PI controller to regulate the terminal PV voltage through the phase shift angle of the DAB converter. The Perturb and Observe (P&O) M...

Digital technology has advanced very significantly over the years both in terms of software tools and hardware available. It is now applied extensively in many area of electrical engineering including protective relaying in power systems. Digital relays have many advantages over the traditional analog relays. The digital relay is able to do what is difficult or impossible in the analog relays. ...

This paper presents a new advanced methodology as a solution for the problem due to the current setting of Relay (21) when it is set to provide thermal backup protection for the generator during two common system disturbances, namely a system fault and a sudden application of a large system load. These investigations are carried out using Adaptive Neuro Fuzzy Inference System (ANFIS). The resul...

This paper outlines a new program called E-TRAN, which bridges the gap between loadflow/stability programs and electro-magnetic transients programs. It is essentially a translation program for power systems, but includes many features to avoid manual calculations (such as the automated formation of multi-port network equivalents, initialization of machines/sources in large systems, auto-routing...

Since a power supply substation of the magnetic levitation train system includes an inverter which is necessary to change the frequency of power, it has a different characteristic comparing to any other railway system. Nowadays, a study is undergoing to determine rating of facilities constituting a power supply system and modeling that system. This paper proposes an analysis model for the power...

Traveling-wave-based fault location in electrical distribution systems is an important safeguard for the distribution network reliability. The effectiveness of the methods is verified directly in power grid in the early stages, while different fault types can't appear in a short time. And normal dynamic physical simulation cannot meet the teaching demand either because of the limitation of tran...

Este trabajo presenta una metodología conocida como la Transformada S para el análisis tiempo-frecuencia de diferentes distorsiones en sistemas eléctricos potencia, las cuales, su mayoría, son no estacionarias y corta duración, debido a contribución impedancias red los tipos cargas conectadas por usuarios. La habilidad identificar todos calidad energía encriptados señales corriente tensión es g...