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.
Several fixed frequency applications of multilevel converters require a very low level of distortion factor of the output voltage. Bringing the output voltage to a form as close as possible to a sine wave is usually done through linearization methods of the Newton-Raphson algebraic equations. The method proposed in section III uses for the waveforms optimization a genetic algorithm, having a positive...
Monitoring of electrical equipment is a direction of current development in the maintenance domain. The method aims to establish the operation state of the monitored equipment. Fault diagnosis existing on power circuit breakers is very important aspect in emergency situations, when it must be interrupted by high current circuit breakers. This paper presents a model of vibration monitoring using Wavelet-Morlet...
The paper presents a few aspects of power quality at the supply port of power electronic converters. The main point is that the lack of power quality, especially in the case of a large harmonic content, leads to conducted electromagnetic interference. The approach focuses mainly on the methods of assessing conduced electromagnetic interference. At the same time the methods of testing in laboratory...
The paper presents the monitoring of the power quality of an underground electric line fed by a high voltage transformer station 110/10 kV and a subsequent earthing fault situation followed by a short circuit. The monitoring process was performed using a power quality analyzer. The analysis of the evolution in time of the phenomena highlights the variations of the voltage in the medium voltage bus...
The paper presents the implementation of a software for the analysis of vibration generated by wind turbines components. This software application has been built in the LabVIEW programming environment. For the vibration analysis and fault detection have been used several techniques, like: wavelet analysis, envelope detection, FFT analysis, Cepstrum analysis, Vector RMS analysis. Vibration signal envelope...
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.