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An Improved Three-Phase Five-Level Inverter Topology With Reduced Number of Switching Power Devices
May 27, 2019

This paper presents an optimized topology of 3-φ, multilevel inverter (MLI) configuration for five or higher level operation with reduced switch count. The proposed solution consists of two basic units (BUs) of multilevel converter and a T-structured 3-level inverter (3-LI). Both BUs are equally shared by the three phases maintaining

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Model-Based Current Control for Single-Phase Grid-Tied Quasi-Z-Source Inverters With Virtual Time Constant
May 27, 2019

In this paper, a model-based current control (MBCC) approach with a compensating of dc-side inductor current ripple, active damping, and virtual time constant is proposed for single-phase grid-tied quasi-Z-source inverters with an LCL filter. The idea behind the ripple compensation is based on the inherent relationship between the ripple components

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Control strategy of DFIG in hybrid micro-grid using sliding mode frequency controller and observer
May 27, 2019

A doubly fed-induction generator (DFIG) has a significant advantage of fast dynamic frequency regulation. However, conventional virtual inertia control (VIC) design only takes frequency into account and may face secondary frequency drop during rotor speed restoration. To solve these problems, the novel decentralised control strategy is proposed for a hybrid

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Development of a ZVT-PWM Buck Cascaded Buck–Boost PFC Converter of 2 kW With the Widest Range of Input Voltage
May 27, 2019

This paper describes the development of a new buck cascaded buck-boost power factor correction (PFC) converter of 2 kW with a soft-switching technique. For its wide range of input voltage, it operates in both buck and boost modes. The parameters are properly selected to endure voltage and current stress in

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Improving power system stability in the presence of wind farms using STATCOM and predictive control strategy
May 27, 2019

In this study, a multi-objective predictive control strategy is presented for the stability improvement of a power system in the presence of wind farms and STATCOM. The main contribution of this study is in the multi-objective consideration for controlling the active and reactive powers of the rotor-side converter in each

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A Single-Phase PFC Rectifier With Wide Output Voltage and Low-Frequency Ripple Power Decoupling
May 27, 2019

This paper proposes a single-phase power factor correction (PFC) rectifier to achieve high power factor, wide output voltage range, and ripple power decoupling without using electrolytic capacitors. It consists of two parts: PFC circuit and output voltage regulation circuit. The load side is involved in both parts, which is different

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Three-Port Bridgeless PFC-Based Quasi Single-Stage Single-Phase AC–DC Converters for Wide Voltage Range Applications
May 27, 2019

Quasi single-stage single-phase ac-dc power converters based on a three-port bridgeless power factor corrector (TPB-PFC) are proposed in this paper. The TPB-PFC, which is able to provide an ac input port, a dc load port, and a dc bus port simultaneously, is derived by introducing a new dc load port

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A Comprehensive Design and Optimization of the DM EMI Filter in a Boost PFC Converter
May 27, 2019

This paper presents a systematic and comprehensive approach for differential mode (DM) electromagnetic interference (EMI) filter design in a three-phase boost-type power factor correction (PFC) rectifier. Since the DM EMI filter forms a significant portion of the overall filter as well as converter volume, the reduction of DM filter component

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Bridge less interleaved SEPIC converter based power factor correction for nonlinear loads.
May 27, 2019

The need for solid-state ac-dc converters to improve power quality in terms of power factor correction, reduced total harmonic distortion at input ac mains, and precisely regulated dc output has motivated the investigation of several topologies based on classical converters such as buck, boost, and buck-boost converters. Boost converters operating

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Single phase thirty one level inverter using only eight switches towards THD reduction
May 27, 2019

Abstract—This project proposes a single-phase thirty one level inverter with reduced switches, with a novel pulse width-modulated (PWM) control scheme. The Proposed multilevel inverter output voltage level increasing by using eight numbers of switches driven by the multicarrier modulation techniques. The inverter is capable of producing thirty one levels of

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Single phase sixty three level inverter using only nine switches towards THD reduction
May 27, 2019

Abstract—Thispaper deals with reduced number of switches in multilevel inverter. Asymmetrical inverter has been used with the topology of cascading the fundamental unit. The grounds behind using multilevel is forenhancing the power quality and scaling down the distortions in waveforms. The output waveform attained is quite closer to sinusoidal waveform

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