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The fault tolerance of electric drives is highly appreciated at industry for security and economic reasons, and the inherent redundancy of six-phase machines provides the desired fault-tolerant capability with no extra hardware. For this reason some recent research efforts have been focused on the fault-tolerant design, modeling, and control of six-phase machines. Nevertheless, a unified and conclusive...
Pico-hydro generation system is the effective way to help the remote communities by generates electricity using water as a main source. The main objective of this project is to introduce the green technology for the society in order to reduce the cost of fuel consumption. Green technology is an alternative energy whereas it is cheap, effective and reliable. It can reduce sources of fuel, capital costs...
This paper presents the performance comparison for 2 types of Bedini SSG free energy generator. The Bedini SSG is one types of magnetic motor generators based on zero point technology created and demonstrated by John Bedini. This device acts as a self-battery charger. The study involved the construction and performance of the original Bedini Monopole Mechanical Oscillator SSG Energizer and 4-Pole...
Vast development in power electronics since the last decade has lead to applications of electric drives with phase number greater than three especially in locomotive, naval, aerospace, and electrical vehicles industry. Multi-phase electric drives offer great number of advantages compared to three-phase electric drives but multi-phase drives produce unwanted low-order harmonics that can lead to losses...
The reliability of in-service power transformers is most important for a safe and economic operation of electrical networks. One possibility is to extend the monitoring and diagnoses of power transformers to all possible types of faults including its ability to withstand the short circuit forces. Nevertheless, this ability can be affected by thermal and mechanical stresses that occur during operation,...
This paper presents the comparison between two switching techniques for a multi-phase voltage source inverter (VSI) using Space Vector Modulation (SVPWM). Two different techniques which based on large vectors and the combination of large and medium vectors have been examined under a two-level five-phase inverter. The performance of these techniques are observed and evaluated in terms of harmonic contents...
Disturbances in a power system such as line switching and sudden removal of faults may cause instability which lead to the power swing phenomenon. During a power swing, the mal-operation of distance relay is among the problem which needs to be solved. In the case of a power swing, a distance relay is designed to block detection to avoid wrong interpretation of relay current signals. However, this...
Current distance relay is accommodated with Power Swing Blocking (PSB) scheme. However, this blocking scheme prove to vulnerable to distance relay operation as it could block the trip signals if the symmetrical fault occur during power swing. Hence, it is important to develop the proper fault detection scheme during power swing to avoid such undesirable circumstances. This paper presents a new detection...
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