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.
Paper analyzes harmonics during transient period of fault in a distribution grid and addresses the possibilities of using low order harmonics for detection of voltage dips during its transient stage. Detail and a comprehensive review of the literature is presented, as well as a major breakthrough in recent years for algorithms that using some form of harmonic transform for detection. The paper also...
Voltage dips are significant threat for distributed generation (DG) connected via grid-tie inverter to the power system. Fast detection of voltage dips is essential for proper operation of the DGs. The paper presents an overview of different methods for their detection. The dips can be traced by appearance of voltage harmonics. Therefore, categorization of harmonics estimation techniques is given...
The paper addresses the problem of fault detection in an unbalanced microgrid with distributed generators, using algorithms based on harmonic estimation: Wavelet Transform (WT), Fast Fourier Transform (FFT) and Reduced Fast Fourier Transform (RFFT). Simulations were carried out in the MATLAB/SimPowerSystems environment. Modified IEEE13 bus system with distributed generation was used. Experimental...
The paper addresses the possibilities of application of discrete Short-time Fourier transform (STFT) and Fast Fourier transform (FFT) for detection of voltage dips in the distribution grid with high level of distributed generation in the concept of the future smart grids. Modelling and testing are carried out in the MATLAB/SimPowerSystems environment. Modified IEEE13 bus system with high level of...
The paper describes voltage dips detection method in cases of grid-tie inverter systems. A newly developed harmonic estimation algorithm, Reduced FFT (RFFT), has been applied. The grid-tie inverter system has been modelled and simulated in the Matlab/SimPowerSystems environment. Laboratory experiment was carried out with dSPACE control hardware. The voltage dips were produced by grid emulator. For...
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.