A Abdelhamid Kechroud

Taking the experience from Flexible AC Transmission Systems to flexible AC distribution systems

FACTS (flexible AC transmission systems) devices are today a well known technology and the existing installations give some good examples of the state of the art of such power electronics based devices. It will be expected that such technology could also be used to solve problems in the distribution system caused by a high penetration level of distributed generation (DG). The aim of this paper is to outline possible applications of the existing FACTS into the distribution system. So taking the experience from a flexible AC transmission system (FACTS) to a flexible AC distribution system (FACDS).

B-Spline Neural Network Approach to Inverse Problems in Switched Reluctance Motor Optimal Design

This paper presents a novel strategy of switched reluctance motor optimal design. The strategy is based on the so called flux linkage characteristic. The flux linkage characteristic contains most of the information of the machine and thus could be regarded as the “footprint” of the machine performance. In this work, first the desired flux linkage characteristic is identified, and then the optimal design parameters are sought after starting form this “idealized characteristic”. This could be regarded as an inverse problem. In this paper, neural networks are proposed to identify the mapping between the design variables and the flux linkage curve of the machine, and thus overcoming the nonlinearities that are inherent to this type of problems. Finite elements analysis is used to validate this approach.

Participation of distributed generation in balance Management

Distributed generation is not yet considered to participate in balance management in power systems. Low marginal costs and poor predictability make them less attractive for this application. However, further integration of distributed generation will make participation in balance management a necessity both for down regulation as well as up regulation. The potential of different distributed generators to participate in balance management is analysed. Economic and regulatory boundaries are discussed, as well as improvements to create incentives for distributed generators to participate.

A power system equivalent impedance based voltage control

Voltage control is traditionally achieved through reactive power control, mainly because of the inductive nature of the transmission grids. However, when considering distribution networks, reactive power may not be an effective mean for voltage control. This is because of the X/R ratio which determines the controllability of voltage through active and/or reactive power. Therefore, in this paper a voltage control scheme is proposed based on the estimation of the X/R ratio of the grid. The estimated X/R will then be used to determine the active and reactive power to be injected into the grid in order to keep the voltage between permissible limits.

Voltage control in distribution networks using fast model predictive control

Voltage control is a growing issue in distribution networks operation, due to the increase in load and also distributed generation. In this work model predictive control (MPC) is proposed as a better solution as compared to conventional ones to deal with this problem. A fast MPC algorithm is used to allow online optimization of voltage profile. the algorithm is tested on a 20 kV distribution network.