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 this paper, we present some results obtained from the application of a class of sliding mode observers to the model-based fault diagnosis problem in non-linear dynamic systems. A Takagi-Sugeno fuzzy model is used to describe the system and then sliding mode observers are designed to estimate the system state vector, from this the diagnostic signal-residual, is generated by the comparison of measured...
Several stochastic methods for voltage sag prediction have been proposed in recent years. These methods usually combine short circuit calculations with historic fault rates data to provide voltage sags estimations. This paper uses an analytical method for stochastic prediction of sags with the aim of providing a better understanding about the phase-angle jump associated to voltage sags. This analytical...
Generally, stochastic analyses of voltage sags are based on short circuit calculations combined with historical fault rates data. Usually, a single network configuration is assumed and the system fault rates are applied to this configuration. However, in the operation of power systems, the network can adopt different scenarios and, consequently, the annual fault rates used for sags assessment should...
In this paper, voltage sags produced by balanced and unbalanced short circuits are analyzed by means of a new analytical method. The main feature of this approach is that contrary to the fault positions method, it does not require a preassignation of discrete fault positions along the lines. The developed algorithm has been applied to the 24-buses IEEE Reliability Test System (RTS) and to a real transmission...
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.