Model-predictive control (MPC) has emerged as a promising method in power electronics, particularly for multiobjective problems such multilevel inverter (MLI) applications. Over the past two decades, improving performance of MPC and tackling its technical challenges, computational load, modeling accuracy, cost function design, weighting factor selection, have attracted great interest electronics. This article aims to discuss current state strategies MLI applications, describing significance...

Multilevel converters (MLCs) are widely recognized for their exceptional benefits and have emerged as the preferred choice medium- high-power/voltage applications. Their usage has also been extended to low-power applications overcome issues associated with high switching frequencies electromagnetic interference (EMI) commonly encountered in two-level converters. Common dc-link MLCs received particular attention industry due ability eliminate need bulky inefficient transformers rectifiers,...

Renewable energy sources, especially photovoltaic (PV) ones, are gaining more and interest due to the predicted lack of conventional sources over coming years. That shortage is not only concern, as environmental issues add this concern also. Thus, study proposes two-stage PV grid connected system, which supported with extended Kalman filter (EKF) for parameter estimation. In first stage, maximum power point tracking (MPPT) boost converter accomplished using new MPPT method in switching state...

In this paper, a comparative review for maximum power point tracking (MPPT) techniques based on model predictive control (MPC) is presented in the first part. Generally, implementation methods of MPPT-based MPC can be categorized into fixed switching technique and variable one. On one side, method uses digital observer photovoltaic (PV) to predict optimal parameter (voltage or current). Later, compared with measured value, proportional-integral (PI) controller employed get duty cycle...

This article proposes a dual-vector finite-control-set model predictive control (FCS-MPC) with reduced complexity for novel nine-level active neutral point clamped (ANPC) converter. topology considerably reduces the used number of power switches compared to other topologies. Only nine and two flying capacitors (FCs) are generate voltage levels. The proposed MPC scheme notably computational burden by directly locating best vectors without need multiple evaluations cost function as in...

Peripheral pulmonary artery stenosis (PPAS) is an underrecognized condition in the adult population. PPAS can lead to hypertension but likely misdiagnosed as either idiopathic arterial or chronic thromboembolic hypertension. We retrospectively identified patients with its isolated form related other congenital defects from January 1998 September 2012. reviewed patients' clinical data by using our hospital electronic medical records and/or their paper charts. 6 age range of 16-56 years (1...

In this paper, a model-based maximum power point tracking (MPPT) technique is presented for two-stage grid-connected photovoltaic (PV) system, where the loci of points (MPPs) specified accurately based on new formulation. formulation, effect both irradiance and temperature taken into consideration, whereas estimated to reduce cost system enhance its reliability. Furthermore, constant generation (CPG) integrated with developed MPPT method facilitate other regulation schemes in PV system. The...

This article proposes a novel hybrid nine-level inverter for high-efficiency applications based on the popular five-level active-neutral-point-clamped (5L-ANPC) topology. Compared with conventional ANPC-based topologies, this reduces required number of active and passive components while avoiding use higher voltage switches. Only nine switches eight gate drivers two discrete diodes are used in each phase leg. Moreover, proposed not only flying capacitors (FCs) but also their rated voltages,...

In this article, an improved finite-control-set model predictive control (FCS-MPC) is presented for active neutral point clamped (ANPC) topology. The considered converter significantly reduces the required power electronics components compared with other common dc-link converters, where only seven switches, one bidirectional switch, and two floating capacitors (FCs) are employed to produce nine levels in phase voltage. developed FCS-MPC handles three objectives weighting factor, namely,...

In this article, a modified control structure for single-stage three phase grid-connected photovoltaic (PV) system is presented. the proposed system, maximum power point tracking (MPPT) function developed using new adaptive model-based technique, in which (MPP) voltage can be precisely located based on characteristics of PV source. By doing so, drift problem associated with traditional perturb and observe (P&O) technique easily solved. Moreover, inverter accomplished predictive dead-beat...

This article presents a new high-efficiency nine-level T-type converter (9L-T2C) for grid-connected applications based on the three-level (3L-T2C). The proposed 9L-T2C outperforms other common dc-link converters in terms of required number active switches and capacitors, flying capacitors (FCs) voltage ratings, efficiency. Only ten power switches, eight gate drivers, two FCs are each phase. Exploiting available pole-redundant states, an balancing algorithm is developed to stabilize with one...

In this paper, a new proposal for the implementation of well-known direct power control (DPC) technique in grid-connected photovoltaic (PV) systems is suggested. Normally, DPC executed using look-up table procedure based on error between actual and reference values active reactive power. Thus, structure simple results fast transient behavior inner current loop (injected currents). Therefore, study, reformulated dead-beat function. formulation, voltage vector (RVV) obtained <tex...

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This paper proposes a finite control set model predictive (FCS-MPC) with reduced computational burden for single-phase grid-connected modified packed U-cell multilevel inverter (MPUC-MLI) two objectives: reference current tracking and switching frequency minimization. The considered competitive topology consists of units six active switches DC sources in each unit, allowing the generation 49 levels output voltage, which is significant reduction passive components compared to conventional...

In this article, an enhanced maximum power point tracking (MPPT) technique for photovoltaic (PV) systems is presented. The proposed MPPT designed fast-changing operating conditions, where the conventional methods suffer from divergence (drift) under such conditions. Mainly, reason in traditional confusion between change due to perturbation of control parameter and variation because atmospheric Therefore, differentiate these cases, additional loops are added perturb observe (P&O) method...

Deadbeat model predictive control (DB-MPC) is one of the advanced promising methods for power converters thanks to its simplicity, high steady-state performance and fast dynamic response. However, sensitivity parameter mismatch difficulty handling multiple targets are problematic issues in DB-MPC. This work presents an improved robust DB-MPC a new nine-level ANPC-based inverter. inverter requires low number devices compared other single dc-source inverters. Only nine active switches two...

Maximum power point tracking (MPPT) techniques extract the ultimate from photovoltaic (PV) source. Therefore, it is a fundamental control algorithm in any PV configuration. The research this area rich and many MPPT methods have been presented literature. However, current study, we focus on model-based algorithms. In regard, classification of category can be mainly divided into curve fitting based mathematical model or characteristics objective to allocate position maximum (MPP). Thus, no...

The present study aims at analyzing and assessing the performance of grid-connected photovoltaic (PV) systems, where considered arrangement is two-stage PV system. Normally, maximum power point tracking (MPPT) process utilized in first stage this topology (DC-DC). Furthermore, active reactive control procedure accomplished second (DC-AC). Different strategies have been discussed literature for grid integration systems. However, we main techniques, which are commonly effective methods to such...

Abstract Introduction COVID-19 pneumonia is a leading cause for worse outcome of infected patients. Factors associated with mortality in vary among studies; identification most possible factors related to might add management. Patients and methods Consecutive patients referred the Assiut University Hospital, Egypt, from June 2020 August 2022 were included our study. All followed up admission until discharge identify that worsen outcome. Our cohort study includes two groups: survivors...

Maximum power point tracking (MPPT) is a very important issue in any photovoltaic (PV) system. This paper presents an MPPT using finite control set model predictive (FCS-MPC), where the system under study composed of PV module, boost converter, and resistive load. The proposed technique not only reduces required sensors by one but also eliminates dependency on load extended Kalman filter (EKF), which greatly enhances robustness reliability based FCSMPC. Finally, validated simulation results...

This paper presents an enhanced maximum power point tracking (MPPT) technique based on the finite-control-set model predictive control (FCS-MPC) for photovoltaic (PV) applications. The system under study is composed of a PV source and resistive load, while boost converter used as interfacing circuit between generator load. To converter, current-based cost function applied to get optimal switching state. Further, previous state included in design enhance MPPT performance. For investigation,...