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 a case study of different control approaches for a single phase Dual Active Bridge (DAB) based MVDC Shipboard power system (SPS). The Line Regulating Converters (LRCs) are based on DAB topology and the load side converters or Point of Load Converters (POLs) are based on buck topology. The tightly controlled POLs exhibit a constant power load (CPL) behaviour, which has a destabilising...
A novel virtual voltage control strategy is proposed for modular multilevel converter in order to reduce the quantity of voltage sensors at the terminal. The output voltage of the inverter is obtained through the upper and lower arm currents of the converter and used to trace the reference active and reactive power, respectively. According to the Routh-Hurwitz criterion, the root trajectory of the...
This paper investigates a three-level three-phase Dual Active Bridge (DAB) dc-dc converter with a star-delta connected transformer. The soft-switching region is analyzed for two and three-level operation, using symmetrical voltage waveforms, showing an increased ZVS range for three-level operation. A large number of switching modes are identified and are modeled with piecewise-linear equations. To...
This paper investigates a nine-switch converter topology for STATCOM (Static Synchronous Compensator) application as well as the developed controller and the modulation strategy. The focus of the paper is to study the grid code compliance of a wind farm integrated into the grid while using the aforementioned converter topology. A numerical example is also given so as to examine the dynamic range of...
This paper proposes an elementary super lift boost converter to achieve high voltage transfer gains, high conversion ratio in addition with isolated full bridge boost converter are used in high voltage applications. The proposed circuit eliminates some of the drawbacks in the conventional full bridge boost converter such as voltage and current stresses through the power converter devices, possibility...
This paper describes a dual inverter motor drive topology using a single supply for open winding induction machine. The paper considers the possibilities of using a dual bridge inverter with one bridge inverter floating, this will allow achieving multilevel voltage output. The charging and discharging of the floating capacitor can be controlled using the redundant switching states. The use of this...
The paper analyzes the bidirectional power exchange achieved with a multiphase DC/DC converter and the possibilities to switch this type of converter between boost and buck operation modes. In particular, the topology and the waveforms of a two-phase DC/DC bidirectional converter with coupled inductances are presented. The currents ripples for two converters sub types, with uncoupled and coupled inductances,...
In this paper, a new basic topology is proposed for cascaded multilevel inverters. The proposed basic topology is comprised of two dc voltage sources, two unidirectional power switches, and an H-bridge. A new generation of cascaded multilevel inverters can be achieved by series connection of some number of proposed basic topology. The proposed cascaded multilevel inverter in symmetric condition utilizes...
The paper presents half-bridge topologies for single phase and three phase AC-AC electronic transformer application. The primary motivation for an electronic transformer is to reduce the weight of the core material needed for isolating low frequency (50–60Hz) AC lines. The half bridge electronic transformer topology achieves the needed isolation with high frequency magnetic components and without...
This paper presents the comparative study between unipolar and bipolar switching scheme for single-phase grid-connected inverter system with filter design on the grid side. For that, LCL filter is considered and its performance for current ripple reduction on grid-side is compared with normal L and LC filter. It is seen that the response for LCL filter show the best results with lower current ripple...
This document aims to describe a rigorous approach to correctly select the optimal turns ratio for a transformer involved in an isolated DC/DC boost full bridge converter realization, considering the input/output voltage ranges, the modulation scheme adopted and the efficiency constraints. The topological structure is first introduced, outlining the hardware components used. The step-down (or Buck)...
This paper is concerned with the design and simulation of a pulse width modulation (PWM) rectifier for three-phase Permanent Magnetic motor drive. Based on the mathematical model of PWM rectifier, the dual-close-loop engineering design with decoupled feed-forward control is applied in the 3-phase voltage source rectifier. The objective to be reached is to realize unity power factor at the input ac...
In this paper, a novel topology of APFC with on-line half-bridge UPS controlled by DSP is presented. The operation principle is analyzed. In order to improve the dynamic response feature of APFC and make the design of LC filter easy, improved current hysteretic control is proposed. A digital control scheme based on DSP is presented. The control model of APFC is simulated with Matlab. In order to verify...
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.