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.
In recent years, it has been proven that one of the main issues in isolated applications is the importance of the dynamic characteristics assessment of three phase self-excited induction generator (SEIG). This paper presents a generalized state-space dynamic model using D-Q stationary reference frame of such a three phase SEIG. The values of self-excitation capacitance and the minimum and maximum...
This paper presents modeling, simulation and experimental results of a three phase induction motor running as single phase generator. Modeling is performed on a small power induction motor with squirrel cage, one phase for excitation and the others for load supply It includes a new model of the total losses, i.e. mechanical, copper and iron losses thanks to the design of experiment method (DoE). Experimental...
The paper proposes an innovative single-phase synchronous generator - a particular case of new generators' stator windings configurations. Electric structures of these configurations are considered, in the case of constant or variable speed squirrel cage and permanent magnet rotor of the three phase machines with single-phase output. The paper is focused on the study of the two stator windings permanent...
The doubly-fed induction generator (DFIG) has advantages in wind energy applications while considering for the economy, quality, and the controllability of the system at various speeds. So as to take advantage of these factors in an effective manner, the DFIG has to be designed with all the degrees of freedom available for the optimum design of the machine. This includes, stator to rotor turns ratio,...
Distributed generation systems are acquiring day by day bigger relevance regarding the conventional ones due to the energy requirements and to the use of sources of ecological and renewable energy. Regarding the energies, one of the most developed is the wind energy, which in many cases uses generating machines of the asynchronous type with multiple excitation feeding. The study was carried out on...
Self-excited induction generators produce power off-grid with capacitors placed in parallel with the load to supply the reactive power. The existing theory predicts an exponential growth of the phase voltages from the zero state when the linearized electrical system has unstable poles, a condition that requires a combination of minimum speed and sufficient capacitance. In practice, however, pre-charged...
Special features of ultrahigh-speed induction generators are analyzed, that are applied in a system developed to generate electric energy by utilizing renewable and waste energy resources. The solution is based on a system that consists of a high-speed turbine, coupled to a three-phase induction generator, an AC/AC converter and a supervisory control unit. The function of the system is to utilize...
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.