A low carbon, high efficiency and high quality power supply scheme for Distributed Generation (DG) in a micro-grid is presented. A three-phase, four-leg DG grid-interfacing converter based on the improved structure of a Unified Power Quality Conditioner (UPQC, including a series converter and a parallel converter) is adopted, and improved indirect and direct control strategies are proposed. It ...

A new very simple single phase ac-ac voltage regulator based on LC network is proposed here that compensates wide range supply voltage variations. This has the capability of both buck and boost the input source voltage level without any change of phase angle. The number of components used in the converter circuit is minimum and smooth output waveform can be achieved without any additional filte...

this paper deals with the design and evaluation of a robust controller for static var compensator (svc) in remote industrial power systems to enhance the voltage profile for three-phase single cage induction motor (scim) loads. the controller design is based on h∞ theory to deal with uncertainties arising in industrial network modelling. the performance of the h∞ controller has been evaluated e...

In this paper a new approach for transmission pricing is presented. The main idea is voltage angle allocation, i.e. determining the contribution of each contract on the voltage angle of each bus. DC power flow is used to compute a primary solution for angle decomposition. To consider the impacts of system non-linearity on angle decomposition, the primary solution is corrected in different itera...

in this paper, a new topology is proposed for three-phase to single-phase matrix converters, where more voltage levels are produced in the output in comparison with the conventional topologies. in addition, a new control method based on minimum error between the generated and the desired output voltages is proposed for three-phase to single-phase matrix converters. in the proposed control metho...

We propose a nematic liquid crystal ͑LC͒ optical phase plate, with a large continuous in-plane gradient that is variable, and its application to a beam steering device with high efficiency. The device is a vertically aligned, continuous phase, optical phased array ͑V-COPA͒ that uses a negative dielectric anisotropy LC material. High steering efficiency of over 95% is demonstrated by modeling the LC...

This paper presents a fuzzy based synchronization scheme for grid connected three phase Bidirectional Contactless Power Transfer (BCPT) system suitable for Electric Vehicle and Plug-in-Hybrid Electric Vehicle. The proposed synchronization scheme estimates the phase angle directly by tracking the grid voltage and frequency variations and facilitates synchronization of BCPT system with grid for c...

A wide view, submillisecond response, and single-cell-gap transflective display using a blue-phase liquid crystal (BPLC) is proposed. To balance the optical phase retardation between transmissive (T) and reflective (R) regions, in-plane protrusion electrodes are formed with different gaps in the two regions. This display exhibits reasonably high optical efficiency and well matched voltage depen...

Phase shift transformers (PST) are a special type of used to regulate active and reactive power on 3-phase transmission networks by adjusting the difference voltage phase angle between system nodes. Problems related flow stability, particularly stability issues, important at extra high (EHV) ultra (UHV) levels due their extreme sensitivity changes. Several studies investigated these problems us...