In this study, a fuzzy‐PI controlled grid interactive inverter has been designed and implemented. The proportional integral gains of the PI controller are decided tuned by fuzzy logic (FLC) according to required operation point system. Thus, adaptive nature FLC robust structure synthesised. Eventually, an which can adopt changes because different conditions, disturbances natural effects with fast transient response is obtained. Simulation studies validated experimental results. Both...

In recent years, the increment of distributed electricity generation based on renewable energy sources and improvement communication technologies have caused development next-generation power grids known as smart grids. The structures bidirectional capability enable connection generated from to any point grid. They also support consumers in efficiency by creating opportunities for management consumption. information consumption load profiles home appliances is essential perform dwelling...

Multi-converter systems used in DC microgrid feed supply constant power loads (CPL) as well classical electrical loads. CPL has a non-linear load nature because of the negative impedance effect. This impact causes instability converter within micro-grid. paper proposes super twisting-based second-order sliding mode control (SOSMC) for regulating output voltage DC/DC buck feeding CPL. The goal this method is to suppress chattering effect and maintaining robustness under variations parametric...

This article introduces an arbitrary fixed-time sliding mode controller based on the disturbance observer (FxDO-FxSMC) for a buck converter with disturbance. FxDO-FxSMC is proposed to address issues of finite time convergence and large initial conditions present in existing controllers. uses surface stabilize presence both matched mismatched disturbances while ensuring convergence. First, converter's modified state-space model, which contains disturbances, defined. Secondly, designed predict...

The optimal power flow (OPF) problem is a critical component in the design and operation of transmission systems. Various optimization algorithms have been developed to address this issue. This paper expands use coronavirus disease algorithm (COVIDOA) solve multi-objective OPF (MO-OPF), incorporating renewable energy sources as distributed generation (DG) across multiple scenarios. main objective minimize fuel costs, emissions, voltage deviations, losses. Due its non-convex nature...

In this study, a novel zero-crossing detector has been designed and implemented that operates as quite steady under the distorted grids due to harmonics. For aim, circuit using UA741, an operational amplifier, which is not affected owing instant spikes sags on signals of current or voltage. Most detectors presented in literature recently generate unsteady output usually voltage signals. The study serves powerful solution for such problems. tested various conditions including 19.8% Total...

In this study, an automatic voltage regulator (AVR) based on artificial neural network (ANN) is presented for a standalone synchronous generator. The AVR maintains the constant output independent of load by altering its excitation current and brings to desired level. Generally, systems are designed using proportional-integral-derivative (PID) controller. paper ANN system proposed get voltage. An experimental setup was prepared acquire data be used training ANN. consists generator,...

Increasing DC distribution systems and the share of renewable energy sources in production allows widespread use multiple DC/DC converter systems. Cascade structure, which is frequently used multi-converter systems, exhibits constant power load behavior. Constant leads to instability effect on open-loop system due its negative incremental impedance. However, these can be stable as a closed-loop by using different control techniques. Compared conventional methods such PI PID, sliding-mode...

Abstract This paper proposes a super‐twisting controller based on PI‐based surface for buck converter with matched disturbance. Standard sliding mode control (SMC) has some well‐known drawbacks: the chattering effect and parameter restriction, which determines how quickly accesses steady‐state error. First, algorithm is employed in rule of proposed to suppress effect. Then, limitation, another deficiency SMC, been eliminated by employing surface. The also improves controller's adjustment...

Smart grid systems, for being profitably implemented, will have to deliver advantageous results costumers, investors and operators. This can be realised by providing efficient, secure reliable connecting distributed renewable energy sources enabling advanced services. The analysis of those potential benefits should consider all the components smart grids from consumers, including communication power flows within system. study aims analyse how reach an efficient use with different means (e.g....

In this paper, disturbance observer based fixed-time sliding mode controller is proposed for buck converter to ensure stability and eliminate the disadvantages caused by external disturbances or parameter/unmodelled uncertainties. The model, which incorporates both matched mismatched disturbances, initially described in order create a comprehensive accurate state-space model. A predicting developed surface of improved adding observer's estimate. Finally, designed independently initial...

This study introduces an intelligent power factor correction approach based on Linear Regression (LR) and Ridge (RR) methods. The 10-fold Cross Validation (CV) test protocol has been used to evaluate the performance. best performance obtained from LR in comparison with RR. empirical results have evaluated that selected compensators developed this work might overcome problems met literature providing accurate, simple low-cost solution for compensation.

Renewable energy sources are being progressively more used for providing needs due to the growing concern of environmental pollution. Photovoltaic (PV) systems have a significant place within renewable sources. Solar cells most important elements photovoltaic systems. They determine parameters meet power requested. For this reason, simulation program is necessary see performance and behavior PV before establishment in different load environment conditions. Therefore has been developed...

Reactive power demanded by many loads besides active is one of the important issue in terms efficient use energy. The optimal solution reactive demand can be p ...

In this paper, a novel control algorithm has been proposed to regulate the DC bus voltage of single phase shunt active power filter using fuzzy logic controller. The should be controlled compensate losses on grid. many industrial applications, PI controller is generally used filters. error signal caused by computed firstly. Then compensated Simulation model with designed Matlab/Simulink/Simpower and Fuzzy Toolbox. simulation results show that compensates grid improves quality reducing total...

DC/DC converters are widely used in new generation applications such as microgrid electric vehicles and storage systems. Controllers which ensure the output voltage on reference value designed with many different methods. Sliding mode control is a prominent controller design for power that has recently attracted attention of researchers. Although conventional sliding advantages chattering relative degree restriction its outstanding weaknesses. The second-order eliminates disadvantages uses...

The design of speed control under various operation such as constant load situations, variable situations and regulated brushless DC motors is an important requirement. In applications, there are modeling errors external disturbance due to environmental conditions between the actual model nominal one. Besides these, nonlinearity motor driver's properties, traditional linear methods fall short their expectations in terms efficiency. Therefore, a robust method necessary overcome these issues....

The aim of this study is to research the effect rotor slots geometry and squirrel cage material on motor performance in Axial Flux Induction Motors (AFIM) by analysing with finite element method. It aimed present a design higher efficiency low torque ripple, especially for use electric vehicles. This aims double stator AFIM rated power 50 kW. Aluminium, copper motors same structure but 6 different geometries are compared. Saturation cores current density coils considered as limit parameters....

To improve the tracking performance and reduce convergence time of speed controllers for permanent magnet synchronous motors (PMSM) under different disturbances, including variations in internal parameters changes external loads, several control enhancements can be implemented. These improvements aim to optimize motor system better overall performance. In this paper, sliding mode based on fixed-time disturbance observer PMSM regulation is proposed. Firstly, a reaching law piecewise function...

In this study, the wind speed potential and energy density of Ankara city are evaluated. Wind data is collected from meteorological measuring station located at 15 meters height above ground level between 2013 2015 it recorded every 10 minutes. Two parameters Weibull distribution one most used methods to analyze characteristic an area. This study aims compare two different which determine evaluate Ankara. Comparative analysis accuracy carried out statistically using Root-Mean Square Error...