Introduction Power systems have undergone a great deal of change in the past decade. The United States electric power grid was deregulated in the late 1990’s. As a result, it is increasingly operated with smaller generation reserves and more transmission congestion. If deregulation continues, it seems likely that power flows will be larger and will fluctuate to a greater extent in future years....

Modern electric power networks are progressively in demand for advanced protection systems due to the changing structures of systems. In distribution systems, emerging scenarios need some compelling efforts. last few decades, a lot innovations such as Advanced Metering Infrastructure (AMI) have made incursions into sector. The development AMI has fostered integration smart meter microgrids and ...

In this paper, we propose a direct-sequence ultra-wideband (DS UWB) transmission system for wireless telemedicine system. An essential feature of this system is that it offers larger power and schemes providing significant error protection for the transmission of medical information that requires higher quality of service (QoS). To realize maximum resource utilization, or minimum total transmis...

The presence of a significant DG capacity in distribution networks will result in some conflicts with the operation of the system, mainly because, unlike the meshed transmission system, the distribution system is usually designed as a “passive” radial system. In general, the impact of DG depends on its penetration level in distribution network as well as on DG technology (e.g. synchronous gener...

-The penetration of DGs would drastically affect the traditional distribution power system fault current level and the characteristics of fault currents, consequently, the traditional protection arrangements developed in radial systems are difficult in coordination, and also the reclosing scheme would be affected. With the rapid developments in distribution system automation and communication t...

power system overvoltages due to switching, lightning and other disturbances are the main problem for designers of the power transformers. once some frequencies of the incoming surges match with some of the natural frequencies of transformer winding, the resonance phenomenon is expected in transformer winding. the resonant overvoltages may destroy the insulation between turns and cause to insul...

This paper presents a distance protection test procedure by applying the Real-Time Digital Simulator (RTDS) of a power system. RTDS is a tool to design, develop, and test power-system protection. The RTDS enables real-time computation of electromagnetic phenomena with a calculation time step of even 50μs. The hardware allows the import and export of many signals from the simulator to an externa...

In this paper, a novel method is proposed to monitor the power system voltage stability using Support Vector Machine (SVM) by implementing real-time data received from the Wide Area Measurement System (WAMS). In this study, the effects of the protection schemes on the voltage magnitude of the buses are considered while they have not been investigated in previous researches. Considering overcurr...