This paper describes an improved sensorless vector control strategy for a squirrel cage induction generator used in variable speed wind energy conversion systems (WECS). The main goal is to design a robust control algorithm immune to generator parameter variations. In order to estimate the rotational speed of the induction generator, a model reference adaptive system (MRAS observer) is used. It...

<p><span lang="EN-US">A stable operation of wind turbines connected to the grid is an essential requirement ensure reliability and stability power system. To achieve such operational objective, installing static synchronous compensator (STATCOM) as a main compensation device guarantees voltage enhancement farm distribution network at different operating scenarios. STATCOM either sup...

In the recent years, many wind turbine generation systems (WTGS) have been installed in many countries. However the electric power obtained from wind generators is not constant due to wind speed variations. The generated electric power and the loss in WTGS change corresponding to the wind speed variations, and consequently the efficiency and the capacity factor of the system also change. In thi...

A new squirrel-cage rotor structure induction motor (IM) that has a auxiliary permanent magnet (PM) rotor and improved cage-rotor structure is presented to enhance the inherent power factor of the IM, and a prototype motor is fabricated by modifying the rotor of a conventional three-phase four-pole squirrel-cage induction motor. The flux linkage, flux distribution, power factor, core loss and e...

This paper presents an effective solution to overcome the problem caused by intermittent energy sources that are connected a balanced/unbalanced distribution system using superconducting magnetic storage (SMES) mitigating voltage and frequency fluctuations during wind gusts. The fuzzy logic control technique (FLC) is used with SMES improve frequency. A squirrel cage induction generator (SCIG) a...

With the widespread use of electric machines, there is a growing need to extract information from the machines to improve their control systems and maintenance management. The present work shows the development of an embedded system to perform the monitoring of the rotor physical variables of a squirrel cage induction motor. The system is comprised of: a circuit to acquire desirable rotor varia...

Recently a new and simple method to mitigate the transient instability of squirrel cage induction generators (IG) without using any additional equipment. The majority of the fixed speed wind turbines are equipped with squirrel cage IG and ac connected to the power system. During a fault in power system, voltage and rotor speed instability may occur, especially when the strength of the system co...