In the scenario of energy and environmental crises that we are facing today, integrating renewable sources of energy with the existing power grids is rapidly becoming the most obvious solution. Harnessing electricity from wind is a promising option that has lately attracted attention and research funding worldwide. However, increasing wind power penetration still remains a daunting problem star...

The use of an inverter with an output LC filter allows for generation of output sinusoidal voltages with low harmonic distortion, suitable for uninterruptible power supply systems. However, the controller design becomes more difficult. This paper presents a new and simple control scheme using predictive control for a two-level converter. The controller uses the model of the system to predict, o...

The paper presents project of reprogrammable chip – FPGA, designed with current-mode gates novel digital gates operating with constant, continuous power supply current. Such continuous supply is a perfect one for analog-digital circuits, which are located on the same single die. Switching of digital part of the chip don’t disturb analog part. Based on the proposed approaches to minimizing logic...

W ITH the recent rapid developments in industrial technology, the modern industrial systems have become more and more complex requiring a greater attention to be paid on the stabilizability, the robustness, the reliability, and the optimization issues. The recent developments in slidingmode control and observation techniques serve as powerful tools in this respect. The use of sliding mode contr...

The paper deals with the problem of designing digital circuits based on the current-mode gates novel digital elements operating with constant, continuous power supply current. The purpose is the provision of a high level of the noise immunity of the chips which compose both analog and digital circuits. The logical properties of this gate basis and several identities for conversing expressions f...

In order to assure the uninterrupted power supply of high speed railway, the reliability assessment of traction substation is essential at the design stage. Based on the system reliability engineering theory, a new system reliability analysis method called the GO-FLOW methodology is applied in the reliability assessment of traction substation of high speed railway. Considering failure and dynam...

This paper addresses voltage control of distributed dc power systems. DC power systems have been discussed as a result of the introduction of renewable, small-scale power generation units. Also, telecommunication power systems featuring UPS properties might benefit from a broader introduction of dc power systems. Droop control is utilized to distribute the load between the source converters. In...

Three phase induction motors are employed in almost all the industries because of its simple construction and easy operation. Efficiency of the induction motor is affected by its fixed losses and variable losses which mainly depend on the input supply voltage and load current respectively. An attempt is made to minimize the iron losses by controlling the supply voltage. A new Three Winding Indu...

The paper deals with the problem of designing mixed programmable analogue-digital circuits on a single die, and in particularly, with the problem of designing FPGA cells with current-mode gates novel digital gates operating with constant, continuous power supply current. Based on the proposed approaches to minimizing logic functions and designing digital current – mode circuits, the current-mod...

The continuous power supply for rural areas can be possible by using renewable hybrid power generation system and also reduction of the energy storage devices for the system. The impact of the shortage of power supply probability, surpluspower power generation, ratio of the energy supply to load demand, renewable fraction of different types of energy resources (solar and wind) and the combined ...