Smart Grid substations rely on conventional Supervisory Control and Data Acquisition (SCADA) systems for remote supervision and control. However, these systems are limited in the geographical area they cover. Recently, the Internet of Things (IoT) has paved the way for connecting a vast number of devices to the Internet, which would be effective and beneficial for power system automation and data acquisition. In this paper, an intelligent low-cost SCADA system based on IoT for transmission line fault diagnosis is proposed. In the first step of the proposed scheme, voltage and current signals at the relaying point are preprocessed and analyzed using Discrete Cosine Transform (DCT). Next, signal energy components are extracted and sent to a Boosted Decision Tree (BSDT), a reliable and fast ensemble classifier, to identify fault type and, accordingly, a specific ANN is activated to estimate fault location. The diagnosis data is sent to a microcontroller to be displayed, trip the load circuit, and allow communication with Cloud ThingSpeak platform via the ESP8266 wi-fi communication module which makes data available anywhere all over the world. The approach is applied on a real-world HV transmission line, located between Samalut and Cairo, Egypt, where more than 16000 faults cases are well tested. The results show the reliability, validity, and effectiveness of the proposed approach.

No abstract

This article provides an impact of applying physics and engineering modern techniques for electric power transmission improvement. Since power losses is a problem in present power systems, many concerns about how to minimize it. Nanotechnology is one of these new techniques and it is also a fastest growing field in research and technology. The main interest of nanotechnology is not electrical power engineering only but there were a lot of possible applications to improve electrical, mechanical, thermal or chemical properties of electric power equipment. This paper illustrates a new application of nanotechnology in electrical power transmission that appeared in coating the transmission lines of type ACSR with a nano layer of copper to minimize the resistance of the transmission and so minimize the transmitted power losses. The substrate used in our experiment was made of aluminium with purity of 99.9 % of dimensions 3×6×0.5 cm. The coating process was done by Hybrid Physical Vapor Decomposition by using DC magnetron sputtering technique. Tested the resistance of the coated substrates is reduced and the obtained results have proven the desired goal of power loss reduction in transmission lines.

No abstract

No abstract