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AC-DC converters are mostly used as power supplies for microelectronic systems, battery chargers, wind energy applications, electric appliances in household and dc motor drives. Switched-capacitor (SC) network based converters can be good solution to the challenges of 21st century having high voltage conversion ratio and low EMI emissions. The application of this type of converters is in microprocessor...
Further growth in renewable energy integration would be dependent on reliability and cost-effectiveness. These two factors can be achieved through power converter topologies that enable transformer-less connection of renewable energy based technology to the grid. This paper presents a three phase five level dual tapped inductor quasi impedance source (qZS)-nested neutral point clamped (NNPC) topology...
Multiterminal HVDC networks are a key technology for future power transmission. For safe and reliable operation, it is necessary to equip these with HVDC circuit breakers. In the presented paper, four HVDC breakers, representing different breaker classes, are dimensioned and simulated in synthetic and exemplary grid fault cases. The results are used to illustrate topology dependent limitations and...
This paper considers a unique type of multitude DC/DC conversion ratios switched capacitor converter. The multitude conversion ratios enable the converter to be able to be almost continuous and competitive to inductive based converters. The paper summarizes the basic rules of the topology as well as presenting two possible ways of implementing the topology. The paper also discusses the difference...
This paper proposes a single-phase five-level buck-boost inverter with a combination of Z-source network and T-type inverter. The proposed inverter has the following advantages as reducing a number of switches, buck-boost voltage with single-stage conversion and shoot-through immunity. In this paper, operating principle, circuit analysis and PWM control are presented. Simulation and experimental results...
This paper proposed a new Power Electronic Transformer (PET) topology in medium and high voltage application of 3-phase AC distribution network. In the proposed topology, diode clamped multilevel converter is used as the rectifier stage, and input series output parallel (ISOP) Dual Active Bridges are adopted for isolated voltage conversion. The proposed topology is suitable for medium and high voltage...
Due to the advantage of realizing the boost converter, allowing the inverter working in the straight through state, Z source network inverter had been widely applied. However, the disadvantages of Z source Inverter, such as low boost capability and start-up impact, have restricted its development. In view of the above questions, this paper proposed a control method of single phase full bridge inverter,...
This paper explores methods to optimize and compare a variety of switched-capacitor (SC) DC-DC topologies that can be operated in a resonant mode. A figure of merit is developed that is a proxy for minimum achievable power loss, based on conduction and frequency-dependent losses in the active semiconductor components. Similar to past work on pure SC converters, the method leverages a charge-multiplier...
This paper presents the dimensioning as well as the comparison of common compensation topologies for inductive power transfer (IPT) systems. A compensation is needed on the primary as well as the secondary side. It consists of a capacitor (parallel or series) in the simplest case or a combination of reactive components (like LCC). This work is the first compilation of the dimensioning, considering...
A novel single phase ac-ac converter with no LC input/output filters is presented in this paper. The proposed converter has all the advantages of the previous single phase impedance source ac-ac converters; it can operate in buck/boost and in-phase/out-of phase with the input voltage, that makes it appropriate for voltage sags/swells compensator without any dc storage. A coupled transformer based...
Recent developments in the optimal power flow (OPF) problem for radial networks open the promise of a more sophisticated management of the distribution end of the power grid. Such sophistication is required to operate efficiently new, dynamic energy resources being introduced at the micro scale. To be useful, however, optimization tools must also accommodate pre-existing management technologies which...
In recent years, the significant growth of the number of inverters connected to the grid as a consequence of the development of renewable energy sources, especially photovoltaic modules, has caused that focus is on innovative inverter circuitries. This paper presents a comparison between two different configurations of three-phase three-level inverters: the neutral-point-clamped and the T-type. Both...
This paper studies and explores feasibility of wireless inductive power transfer (IPT) systems using current source inverter (CSI) topology for electric vehicle battery charging applications. Possible IPT systems with CSI topology includes current-fed push-pull, half-bridge and full-bridge converters. Also the possible compensation or resonant tank network at transmitter side is parallel LC or CCL...
In this paper, a new hybrid converter based of Z-source DC/DC converter with common ground is introduced. The proposed converter can supply ac and dc loads simultaneously or individually (stand-alone ac or dc loads). Also, the commutation problem of its counterpart has been solved in this topology. The proposed hybrid converter is analyzed mathematically and then validated by simulation in three different...
Inductors and diodes in combination with active switches are the basic building blocks of dc-dc converters. When the active switches are gated on then inductors are charged in series and when the switch is off, inductors are discharged in parallel. The principle of these switched inductor topologies are basic building blocks of impedance network topologies. In these topologies, the inverter zero state...
Low Voltage DC (LVDC) distribution systems are new promising technologies which can potentially improve the efficiency and controllability of existing LV distribution networks. However, they do introduce new challenges under different fault conditions. Therefore, this paper investigates the performances of an active LVDC distribution network with local solar photovoltaics (PVs) and energy storages...
A new current-fed topology for wireless inductive power transfer (IPT) application using half-bridge circuit is proposed and analyzed. Conventional IPT circuits employ parallel L-C resonant tank/compensation network to transfer power effectively through air-gap. However, in medium power application, this topology suffers from a major drawback that the voltage stress across the inverter switches are...
A new galvanically isolated DC-DC converter has been presented in this paper. The proposed topology is based on the quasi-switched-boost impedance network. It not only includes all positive characteristics of previous converters including continuous input current, high boost ability and high efficiency, but also has the prominent features of less passive elements utilization, small size and light...
This paper proposes a novel modular voltage balancing topology for an active battery management system (BMS). The proposed topology consists of two power stages. The first stage is composed by a switch network, which is responsible for selecting the battery that will provide energy and the battery that will receive energy. In the switch network, for each battery, are used two cells, which allow the...
Wireless inductive power transfer technology is becoming very popular in many applications especially in electric vehicles. Until now there are many inductive power transfer topologies are reported based on power electronics, reactive power compensation network and wireless pad. This paper presents detail comparison between parallel L-C and C-C-L compensation network where the DC-AC converter for...
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