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.
Voltage sag has been one of the most concerned problems of power quality. Identifying the location of the source of voltage sag is critically necessary for power-quality troubleshooting, diagnosis and mitigation, and it is helpful to distinguish responsibilities and solve disputes caused by voltage sag. This paper analyses and compares four existing location methods based on reactive power change,...
The technical and economic assessment of voltage sag are analyzed in this paper, Specially, on one side, the sag conditions of customers are got by Monte Carlo prediction considering about randomness of sag event, on the other side, the equipment failure rate is counted by probability method due to the uncertain sensitivity and different tapes and the composition of sensitive equipment. Then the sag...
The method of voltage sag source location proposed in this paper is using wavelet-multiresolution to decompose the voltage and current waveforms from monitoring points and analyzing the change of signal energy of three-phase instantaneous power during voltage sag to ascertain the sag source location relative to the monitoring points. The location of voltage sag caused by line fault, transformer energizing...
Expound the problems and danger of excessive current impulse through the capacitor when the parallel power quality conditioner starts charging. Two control strategies is discussed and compared. One method uses a current limiting resistor at the charging circuit and the other uses an auxiliary charging circuit. Both of these methods can effectively guarantee the safety of the device when it is put...
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.