The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The development of new technologies has provided a fast growth of the wind turbine industry. Worldwide governments have presented financial programs of alternative energy sources. The increase of wind turbines in electrical systems has led the system operators to make codes to regulate the integration of wind farms with the network, setting minimum conditions for supportability. The aim of this paper...
Wind energy conversion systems using the doubly-fed induction generator (DFIG) are the most commercialized topology worldwide, because this technology uses converters dimensioned for ±30% of the system rated power, thus reducing the equipment cost. The direct connection of the DFIG stator to the electrical system increases its sensitivity to grid disturbances. In this context, this paper analyzes...
Most of power transformers, before being commercialized, must undertake a series of tests with the objective of analyzing their operational behavior under real operating conditions. Such tests sometimes demand a high amount of power increasing significantly their costs. The paper presents a proposed system which allows testing in closed loop, reducing the energy consumption to the natural losses of...
The National Fuel, Natural Gas and Bio-fuels, Agency, (NFA) established the Fuels Quality Monitoring and Control Program (FQMCP) aiming at guaranteeing the fuelspsila quality standards along the extraction, refining, distribution and monitoring phases. The FQMCP supervising process - which includes various phases, from production to merchandizing of fuels and derivative good - is formed by the following...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.