Multilevel inverter technology has emerged recently as a very important alternative in the area of high-power medium-voltage energy control. This paper presents most topologies like diode-clamped (neutral-point clamped), capacitor-clamped (flying capacitor), and cascaded multicell with separate DC sources. Emerging asymmetric hybrid cells soft-switched multilevel inverters are also discussed. relevant control modulation methods developed for this family converters: sinusoidal pulsewidth...

Multilevel converters have been under research and development for more than three decades found successful industrial application. However, this is still a technology development, many new contributions commercial topologies reported in the last few years. The aim of paper to group review these recent contributions, order establish current state art trends technology, provide readers with comprehensive insightful where multilevel converter stands heading. This first presents brief overview...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> This paper presents a technology review of voltage-source-converter topologies for industrial medium-voltage drives. In this highly active area, different converter and circuits have found their application in the market. covers high-power voltage-source inverter most used multilevel-inverter topologies, including neutral-point-clamped, cascaded H-bridge, flying-capacitor converters. operating...

Cascaded multilevel inverters synthesize a medium-voltage output based on series connection of power cells which use standard low-voltage component configurations. This characteristic allows one to achieve high-quality voltages and input currents also outstanding availability due their intrinsic redundancy. Due these features, the cascaded inverter has been recognized as an important alternative in market. paper presents survey different topologies, control strategies modulation techniques...

This work is devoted to review and analyze the most relevant characteristics of multilevel converters, motivate possible solutions, show that we are in a decisive instant which energy companies have bet on these converters as good solution compared with classic two-level converters. article presents brief overview actual applications provides an introduction modeling techniques common modulation strategies. It also addresses operational technological issues.

This paper presents a detailed description of finite control set model predictive (FCS-MPC) applied to power converters. Several key aspects related this methodology are, in depth, presented and compared with traditional converter techniques, such as linear controllers pulsewidth-modulation-based methods. The basic concepts, operating principles, diagrams, results are used provide comparison between the different strategies. analysis is performed on three-phase voltage source inverter,...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> Neutral-point-clamped (NPC) inverters are the most widely used topology of multilevel in high-power applications (several megawatts). This paper presents a very simple way basic operation and modulation control techniques developed to date. Special attention is paid loss distribution semiconductors, an active NPC inverter presented overcome this problem. discusses main fields application some...

Predictive control is a very wide class of controllers that have found rather recent application in the power converters. Research on this topic has been increased last years due to possibilities today's microprocessors used for control. This paper presents different predictive methods electronics and drives. A simple classification most important types introduced, each one them explained including some examples. several advantages make it suitable converters The schemes applications...

This paper addresses to some of the latest contributions on application Finite Control Set Model Predictive (FCS-MPC) in Power Electronics. In FCS-MPC , switching states are directly applied power converter, without need an additional modulation stage. The shows how use provides a simple and efficient computational realization for different control objectives Some applications this technology drives, active filters, conditioning, distributed generation renewable energy covered. Finally,...

Model predictive control (MPC) is a very attractive solution for controlling power electronic converters. The aim of this paper to present and discuss the latest developments in MPC converters drives, describing current state strategy analyzing new trends challenges it presents when applied systems. revisits operating principle identifies three key elements strategies, namely prediction model, cost function, optimization algorithm. This summarizes most recent research concerning these...

This paper presents a predictive current control method and its application to voltage source inverter. The uses discrete-time model of the system predict future value load for all possible vectors generated by vector which minimizes quality function is selected. used in this work evaluates error at next sampling time. performance proposed compared with hysteresis pulsewidth modulation control. results show that controls very effectively performs well classical solutions

This paper gives an overview of medium-voltage (MV) multilevel converters with a focus on achieving minimum harmonic distortion and high efficiency at low switching frequency operation. Increasing the power rating by minimizing while still maintaining reasonable quality is important requirement persistent challenge for industry. Existing solutions are discussed analyzed based their topologies, limitations, control techniques. As preferred option future research application, inverter...

Modular multilevel converters have several attractive features such as a modular structure, the capability of transformer-less operation, easy scalability in terms voltage and current, low expense for redundancy fault tolerant high availability, utilization standard components, excellent quality output waveforms. These increased interest industry research this topology, resulting development new circuit configurations, converter models, control schemes, modulation strategies. This paper...

Multilevel converters are considered today as the state-of-the-art power-conversion systems for high-power and power-quality demanding applications. This paper presents a tutorial on this technology, covering operating principle different power circuit topologies, modulation methods, technical issues industry Special attention is given to established technology already found in with more in-depth self-contained information, while recent advances contributions addressed useful references....

When control schemes based on finite set model predictive are experimentally implemented, a large amount of calculations is required, introducing considerable time delay in the actuation. This can deteriorate performance system if not considered design controller. In this paper, problem described, and solution to issue clearly explained using three-phase inverter as an example. Experimental results validate shown.

New regulations impose more stringent limits on current harmonics injected by power converters that are achieved with pulsewidth-modulated (PWM) rectifiers. In addition, several applications demand the capability of regeneration to supply. This work presents state art in field regenerative rectifiers reduced input and improved factor. Regenerative able deliver energy back from dc side ac Topologies for single- three-phase supplies considered their corresponding control strategies. Special...

Multimegawatt wind-turbine systems, often organized in a wind park, are the backbone of power generation based on renewable-energy systems. This paper reviews most-adopted adopted generators, topologies converters, generator control and grid connection issues, as well their arrangement parks.

This paper presents a single-phase cascaded H-bridge converter for grid-connected photovoltaic (PV) application. The multilevel topology consists of several cells connected in series, each one to string PV modules. adopted control scheme permits the independent dc-link voltage, enabling, this way, tracking maximum power point panels. Additionally, low-ripple sinusoidal-current waveforms are generated with almost unity factor. offers other advantages such as operation at lower switching...

Model predictive control with a finite set has emerged as promising tool for power converters and drives. One of the major advantages is possibility to several system variables single law, by including them appropriate weighting factors. However, at present state art, these coefficients are determined empirically. There no analytical or numerical method proposed yet obtain an optimal solution. In addition, empirical not always straightforward, procedures have been reported. This paper...

The use of an inverter with output <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LC</i> filter allows for generation sinusoidal voltages low harmonic distortion, suitable uninterruptible power supply systems. However, the controller design becomes more difficult. This paper presents a new and simple control scheme using predictive two-level converter. uses model system to predict, on each sampling interval, behavior voltage possible switching...

This paper presents an overview of the state art in reactive power compensation technologies. The principles operation, design characteristics and application examples Var compensators implemented with thyristors self-commutated converters are presented. Static generators used to improve voltage regulation, stability, factor ac transmission distribution systems. Examples obtained from relevant applications describing use new static technologies also described.