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This paper deals with a proposal of a carrier redistribution PWM and its comparison with a phase disposition PWM (PDPWM) and carrier redistribution PWM for a multilevel converter dedicated to high power medium voltage electric drives. The converter topology is based on a cascaded connection of two-level inverters, the so called dual inverter. The well known phase disposition PWM for multilevel converters...
This paper introduces advanced power-electronic converter topologies for Electric Vehicles (EVs) using a four-phase DC/DC interleaved boost converter (FP-IBC) and a five-level T-type DC/AC multilevel converter. A comparison between the proposed topologies and other converter topologies is performed and discussed. The simulation results are analysed to evaluate the converters based on power loss calculations...
This paper describes the construction of the rotating power electronic converter. By mounting the power electronics on the rotor of an induction machine, the rotor winding can be made easily accessible without the use of slip-rings and brushes. This offers certain advantages regarding motor control. However, it is evident that the rotating mass, communication with the converter and maintaining the...
Nowadays multilevel converter topology has been growing since last few decades because it consists of lesser number of switches and DC sources. Multilevel converter topology integrates the stepped waveform to produce waveform nearly equal to sinusoidal waveform. To reduce switching losses and increasing efficiency of multilevel inverter the core idea is to minimize the number of switches. The proposed...
This paper presents a method for the calculation of the power semiconductor rating based on data sheet parameters of the three-level Neutral-Point-Clamped (NPC) inverter. Beside the basic equations for calculating the turn-on and turn-off losses for Insulated Gate Bipolar Transistors (IGBT) and diodes, the electrical inverter topology, the different current paths for the commutations and the critical...
A DC/DC Modular-Multilevel Converter (MMC) is proposed in this paper, in which two modular multilevel converters are linked by a LCL tank. With the proposed converter, the high power medium frequency transformer can be eliminated to simplify the structure, quasi zero-current-switching operation of both MMCs can be achieved to alleviate the switching loss, the voltage stress of internal LCL tank can...
Emerging new voltage source converter based HVDC applications demand fast short-circuit fault current interruption. Fast dc circuit breakers are identified as the feasible solution to handle the dc fault current. Switching overvoltage across the dc circuit breakers is destructive for the interrupter device and also for the other components of the system. A new topology of fast solid-state circuit...
This paper investigates an improved 3-level flying capacitor inverter topology allowing a drastic reduction of reverse recovery related losses. It benefits from the latest superjunction (SJ) MOSFET devices. The presented 2kW inverter was designed for Japanese PV market (200Vrms). It allows non unitary power factor operations with peak and European efficiency of 98.0% and 97.6% respectively. Thanks...
Due to the increasing integration of distributed generators, the grid underlies conceptual challenges. To ensure an efficient and reliable operation, more controllable assets are expected in the future grid. The transformer as one of the most important components possesses only limited control capabilities today. By combining a conventional transformer with a converter, a hybrid transformer with comprehensive...
A comparison of the two-level voltage-source inverter, the three-level Neutral-Point-Clamped inverter and the T-Type inverter based on the power semiconductor rating is presented for drive inverters of electric vehicles. The comparison of the power semiconductor design rating is done for four different drive train configurations: normal operation with a constant DC-link voltage, an overload capability,...
The Dual Active Bridge (DABC) dc-dc converter is an integral part of the recently popular Medium-Voltage (MV) dc micro-grid application due to its high-power density. The advent of 15kV SiC IGBT and 10kV SiC MOSFET, has enabled a non-cascaded MV and Medium-Frequency (MF) DABC converter which is expected to have higher MTBF than the cascaded H-bridge topology due to relatively small number of switches...
This paper compares 3-level and a 5-level ANPC-VSCs in terms of the power losses and the maximum output current given by the junction temperature of the most stressed device, in a wide range of operating points, by simulating theses converters with 4.5 kV, 120 A IGBT modules connected in series. The junction temperature of the most stressed semiconductors limits the maximum allowable output current,...
This paper investigates the design procedure of cascaded H-bridge (CHB), modular multilevel converter (MMC) and five-level active neutral point clamped (5-L ANPC) topologies for medium-voltage and high-power industrial motor drive application. The design is performed using 1.7-kV insulated gate bipolar transistor (IGBT) technology for CHB and MMC converters, and utilizing 3.3- and 4.5-kV IGBTs for...
Recent development in DC technologies and renewable energy increase the requirement in building large HVDC networks. The world first Zhoushan five-terminal HVDC project constructed in China has been put into operation. To increase the operation reliability, a HVDC circuit breaker will be required. However the existing HVDC breaker developed in recent years still can't deal with severe fault current...
Neutral-Point-Clamped topologies have been widely applied to improve power conversion efficiency. Active NPC variants may offer an advantage in terms of efficiency and losses distribution. Remarkably, Active NPC topologies differ from traditional NPC in terms of power semiconductors characteristics and commutation paths. This paper investigates Active 3L NPC converters in double-conversion UPS applications...
Smart energy router (SER), also called as power electronics transformer (PET) or solid state transformer (SST), will serve as a critical component in the next-generation electric power system. Taking advantage of modular multilevel converter (MMC) and input series output parallel (ISOP) topologies, new type of smart energy router has been developed. Presented architecture using two stages with AC/DC...
Energy efficiency requirements of PV-inverter and UPS can be reached through multi-level IGBT topologies. A 3-level T-type topology utilizing dedicated 650V and 1200V IGBT and free-wheeling Diode chips (FwDi) and low inductance module construction are essential to create a performing IGBT module for these applications.
Standard Voltage Source Inverters (VSI) operates with a DC voltage source greater than the peak voltage of the AC source and Current Source Inverters (CSI) with a DC voltage source lower than the peak voltage of the AC source. This paper shows how several topologies of reversible AC/DC buck-boost inverters which do not suffer from such constraints can be compared on the basis of semiconductor and...
Energy diverting converter topologies are important power electronic components for HVDC connected offshore wind parks to meet grid code requirements. In this paper, three different types of energy diverting converter topologies are investigated. In the first section, the topologies are introduced and compared under general aspects. Afterwards, an approach for a sinusoidal voltage modulation of a...
One major research topic in the PFC rectifiers area is represented by efficiency improving methods, while maintaining the unity power factor. The investigated topologies in this paper are the single stage versus interleaved eight-switch rectifiers topologies with or without considering the DC-link diodes. For the eight-switch rectifier a new control strategy is proposed in [8]. The proposed interleaved...
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