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.
This paper presents the application of an online stability monitoring technique (MT) for droop controlled power converters in DC microgrids. This method is based on Middlebrook's loop-gain measurement technique, adapted to digitally controlled switched-mode power supplies (SMPS). In particular, the MT is used to evaluate the stability margin in control loops of droop-controlled distributed energy...
The interactions of more and more power electronics-interfaced power systems can worsen the power quality and the system stability in distribution networks. System stability can be addressed analyzing the source and load impedances at the interaction section and well-established approaches exist for DC and three-phase AC networks. Some papers focus also on single-phase AC systems, whose study is generally...
The interactions of more and more power electronics-interfaced power systems can worsen the power quality and the system stability in distribution networks. System stability can be addressed analyzing the source and load impedances at the interaction section and well-established approaches exist for DC and three-phase AC networks. Some papers focused also on single-phase AC systems, whose study is...
Grid synchronization instability issues and low frequency oscillations between synchronous generators exist in electrical power system. This kind of stability issue happens between paralleled power converters is also reported. Analysis based on small-signal model of inverters with phase-locked loops (PLL) has been proposed. Different from that approach, which needs detailed inverter and controller...
A digital hybrid ramp compensation method with output capacitor current ramp estimator and external ramp for digital V2 control is proposed to solve the stability issues in low-ESR output capacitor application of buck converters. Since capacitor current is in derivative relation with output voltage, the proposed method has faster transient response and simpler structure than digital inductor current...
Stability is a great concern for power systems with relatively small sources and multiple regulated power converters. Addressing this need, this paper presents the experimental verification of the Generalized Nyquist stability Criterion (GNC) for balanced three-phase ac systems. This criterion, developed by MacFarlane and Postlethwaite in the 1970's, was proposed as a stability analysis tool for ac...
This paper presents the islanding detection algorithms for three-phase (3Ф) grid-interface converters based on the grid synchronization small-signal stability. To study the grid synchronization behavior at the islanded condition, a low-frequency small-signal phase-locked-loop (PLL) model is proposed by considering the converter interaction with the system impedances. Many of the frequency-related...
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.