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.
At microgrids, classical grid-regulating generators are replaced by converter-interfaced distributed generation (DG) or energy storage systems (ESSs). This causes a reduction of the total inertia of the system and hence the microgrid voltage and frequency become more susceptible under power variations. DC microgrids are specially affected by this phenomena as systems with rotating inertia can not...
This paper presents a new power supply consisting of an inverter and a power factor correcting stage with an integrated active energy storage for servo drives. The energy storage is realized with a capacitor and a DC-DC-converter. This enables the power supply to reuse the braking energy of servo drives instead of losing it in a braking chopper resistor. The main advantage is the simple integration...
The modular multilevel converter (MMC) is one of the available solution to connect a HVDC grid to an AC transmission one. The Alternate Arm Converter (AAC) is a promising structure since it allows a DC short-circuit blocking capability as the Full Bridge MMC while having equivalent losses to the half-bridge MMC. Its footprint is smaller than the MMC since the needed number of modules is closer to...
This paper studies an energy storage system based on a three-level DC-DC converter and a grid-connected neutral-point-clamped inverter. The main advantages of this multilevel power conversion system are highlighted and the neutral-point voltage oscillations are analyzed. A modulation algorithm for the DC-DC converter which includes the neutral-point voltage balance control is used to improve the voltage...
Bidirectional power converters are frequently applied when interfacing energy-storage devices such as supercapacitors, uninterruptible-power-supply batteries and generators, electric-vehicle motors and renewable-energy-system generators. This paper presents a bidirectional half bridge DC/DC converter, featuring a novel sliding-mode controller, input and output short-circuit protection and a wide input...
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.