The use of distributed energy resources is increasingly being pursued as a supplement and an alternative to large conventional central power stations. specification power-electronic interface subject requirements related not only the renewable source itself but also its effects on power-system operation, especially where intermittent constitutes significant part total system capacity. In this paper, new trends in electronics for integration wind photovoltaic (PV) generators are presented. A...

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...

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.

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...

Energy storage systems (ESSs) are enabling technologies for well-established and new applications such as power peak shaving, electric vehicles, integration of renewable energies, etc. This paper presents a review ESSs transport grid applications, covering several aspects the technology, main converters used to operate some energy technologies. Special attention is given different providing deep description system addressing most suitable technology. The objective this introduce subject give...

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....

Photovoltaic (PV) energy has grown at an average annual rate of 60% in the last five years, surpassing one third cumulative wind installed capacity, and is quickly becoming important part mix some regions power systems. This been driven by a reduction cost PV modules. growth also triggered evolution classic converters from conventional single-phase grid-tied inverters to more complex topologies increase efficiency, extraction modules, reliability without impacting cost. article presents...

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 proposes an extended state observer (ESO) based second-order sliding-mode (SOSM) control for three-phase two-level grid-connected power converters. The proposed technique forces the input currents to track desired values, which can indirectly regulate output voltage while achieving a user-defined factor. presented approach has two loops. A current loop on SOSM and dc-link regulation consists of ESO plus SOSM. In this work, load connected capacitor is considered as external...

The main design objective of photovoltaic (PV) systems has been, for a long time, to extract the maximum power from PV array and inject it into ac grid. Therefore, point tracking (MPPT) uniformly irradiated maximization conversion efficiency have been issues. However, when plant is connected grid, special attention be paid reliability system, quality, implementation protection grid synchronization functions. Modern plants are required maximize their energy production, requiring suitable...

In the last decades, multilevel converters have been developed usually for medium-voltage high-power applications. They become a mature solution increasing power demand of multiple applications such as renewable energy systems, quality improvement, and motor drives. this paper, operation is addressed focusing on control modulation techniques different well-known The new developments are presented an extension conventional methods two-level voltage-source which still mainstream most cases.

The cost reduction of power-electronic devices, the increase in their reliability, efficiency, and power capability, lower development times, together with more demanding application requirements, has driven several new inverter topologies recently introduced industry, particularly medium-voltage converters. New complex fields come along additional control challenges, such as voltage imbalances, power-quality issues, higher efficiency needs, fault-tolerant operation, which necessarily...

Grid-connected power converters play a key role in several applications such as the integration of renewable energy sources and motor drives. For this reason, development high performance control strategies for particular class has increasingly attracted interest both academic industry researchers. This paper presents predictive optimal switching sequence (OSS) direct (DPC) (OSS-DPC) algorithm grid-connected converters. The OSS-DPC method belongs to predictive-DPC family provides desired...

Prediction of remaining useful life (RUL) is an indispensable part prognostics health management (PHM) in complex systems. Considering the parallel integration spatial and temporal features implicated measurement data, this article proposes a novel hybrid neural network that consists 1-D convolutional (1-DCNN) bidirectional gated recurrent unit (BiGRU) to predict RUL. Specifically, information from historical data extracted with aid 1-DCNN BiGRU, respectively. On basis, trained can be...

The power conversion system based on the modular connection has widespread applications in various electronic systems. To accurately estimate state of health without recognizing systematic mathematical model and to extend lifetime, this article proposes a lifetime extension approach Levenberg–Marquardt back propagation neural network (LM-BPNN) routing interleaved dc–dc boost LM-BPNN is constructed voltage, current, temperature data generated by system. On basis trained LM-BPNN, real-time...

Both the proportional-integral (PI) controller and super-twisting algorithm (STA) are attractive alternatives to effectively govern power converters. The PI is smooth but less robust disturbances, while STA exhibits good robustness with respect disturbances suffers from negative effect of chattering when some high control gains required in actual applications. To combine advantages both controllers, this paper explores a novel observer-based varying exponent gain scheme for three-level...

Due to the development of new grid codes, power converters' output signal harmonic control is currently becoming extremely important in medium- and high-power applications. By taking this scenario into account, a method generate switching three-level pulsewidth-modulation (PWM) patterns meet specific codes presented. The proposed method, which named selective mitigation PWM , generates with high quality from point view content, avoiding elimination some harmonics studying all total...

In high-power applications, the maximum switching frequency is limited due to thermal losses. This leads highly distorted output waveforms. such it necessary filter waveforms using bulky passive filtering systems. The recently presented selective harmonic mitigation pulsewidth modulation (SHMPWM) technique produces where distortion limited, fulfilling specific grid codes when number of angles high enough. related has been previously a that equal 750 Hz. this paper, special implementation...

Three-level converters are becoming a realistic alternative to the conventional in high-power wind-energy applications. In this paper, complete analytical strategy model back-to-back three-level converter is described. This tool permits us adapt control specific application. Moreover, of different loads can be incorporated overall model. Both and load models included system The proposed pays special attention unbalance capacitors' voltage converters, including dynamics voltage. order...

Large scale grid connected photovoltaic (PV) energy conversion systems have reached the megawatt level. This imposes new challenges on existing interface converter topologies and opens opportunities to be explored. In this paper a medium voltage multilevel-multistring configuration is introduced based three-phase cascaded H-bridge (CHB) multiple string dc-dc converters. The proposed enables large increase of total capacity PV system, while improving power quality efficiency. structure very...

This article reviews the present state and trends in development of key parts controlled induction motor drive systems: converter topologies, modulation methods, as well control estimation techniques. Two- multilevel voltage-source converters, current-source direct converters are described. The main part all produced electric energy is used to feed motors, conversion electrical power into mechanical involves motors ranges from less than 1 W up several dozen megawatts.

In this paper, a new three-phase, five-level inverter topology with single-dc source is presented. The proposed obtained by cascading three-level flying capacitor H-bridge power cell in each phase. This has redundant switching states for generating different pole voltages. By selecting appropriate states, the voltages can be balanced instantaneously (as compared to fundamental) any direction of current, irrespective load factor. Another important feature that if fails, it bypassed and...