Amar Bouafassa

• Ph.D Control Engineering
• Associate Professor at National Polytechnic School of Constantine (ENPC), Algeria

Switching DC/DC boost converters are one of the most economical devices for increasing supply voltage due to their large conversion efficiency. With the development of modern control technologies, control of DC/DC converters has become increasingly important to improve system power density and efficiency. The output voltage of these power converter...

As a widely used technology, active power factor corrector (A-PFC) circuits face many control challenges, such as nonlinearity and uncertainties. With more and more power electrical appliances that are connected to the utility grid, the A-PFC is for the task of improving the power quality (PQ) to meet the requirement of the international standards,...

In the realm of fuel cell technologies, solid oxide fuel cells are distinguished by their efficiency and potential for sustainable energy conversion. However, controlling these cells poses significant challenges due to the inherent nonlinearity of their output voltage characteristics. The current study introduces an improved model-free control stra...

This paper presents an innovative control scheme designed to significantly enhance the power factor of AC/DC boost rectifiers by integrating an adaptive neuro-fuzzy inference system (ANFIS) with predictive current control. The innovative control strategy addresses key challenges in power quality and energy efficiency, demonstrating exceptional perf...

This article provides a systematic approach for synthesizing a novel robust synergetic control mechanism. This controller employs a dynamic global terminal synergetic surface with additional sinusoidal function. The overall macrovariable gives the system a rapid approaching rate, maintains the finite time stability, and provides a chattering-free c...

This work presents a new controller design to improve inter-area low frequency electromechanical oscillations (LFEOs) damping and enhance the overall stability of the electrical network. The control strategy used the static synchronous series compensator (SSSC) based flexible AC transmission systems (FACTS) series-type device mainly performed for p...

In order to improve the performance and suppress the chattering problem of variable structure control system, a nonlinear novel quick reaching law with dynamic power term is suggested, which could enhance the convergence rate whenever the system state position is near to or far from the manifold. Furthermore, a novel fast terminal sliding surface w...

In this article, in order to minimize response time and enhance anti-disturbance performance of parmanent magnet synchronous motor, a global integral terminal sliding mode control based on improved quick reaching law (GITSMC-QRL) is developed. This novel reaching law has two terms which play a key role of bringing state trajectory to sliding surfac...

This paper proposes an intelligent control of efficient single stage bridgeless single ended primary inductor converter (SEPIC) to achieve an high power indices while powering brushless direct current (BLDC) motor. The proposed AC/DC PFC converter can generate unity power factor (PF) and low voltage stress across the switching device. The overall s...

Photovoltaic cells transfer daylight energy into electricity, however they always suffer from issues of low energy efficiency. the maximum power point algorithms are method of extracting the optimum power from renewable energies plants and predominating pre-mentioned drawback. In this paper, a three stage maximum power point charge controller is pr...

Ensuring a high electric power quality of power systems and electric machinery continues to be a major challenge for power engineers. The research on harmonic reduction and improvement of power factor in connection to alternating current (AC) networks has intensified. This paper focuses on the simulation and real-time implementation of a single-pha...

In this article, a metaheuristic optimized multilayer Feed-forward Artificial Neural Network (ANN) controller is proposed to extract the maximum power from available solar energy for a three-phase shunt active power filter (APF) grid connected photovoltaic (PV) system supplying an arc welding machine. Firstly, in order to improve the maximum power...

Inter-area low frequency electromechanical oscillation (LFEO) is one of the main threats to the stability and secure operation of interconnected power systems. Poorly damped growth of theses oscillations can cause system instability and may even lead to blackouts. In such a context, Flexible Alternating Current Transmission System (FACTS) devices,...

This paper proposes an efficient bridgeless power factor corrected (PFC) modified single ended primary inductor converter (SEPIC) for arc welding power supplies (AWPS). The overall configuration is composed of two converters: (1) a modified bridgeless SEPIC PFC converter, which is controlled by a PI controller to achieve a high power factor and fas...

This paper proposes a simple, low-cost, and powerful controller based on finite state model predictive controller (FS-MPC) for a single-phase boost power factor correction (PFC). The proposed controller can achieve high static and dynamic performances under different loads or DC link voltage variations. The proposed method works in the discrete tim...

This paper presents a real time implementation of the single-phase power factor correction (PFC) AC-DC boost converter. A combination of higher order sliding mode controller based on super twisting algorithm and predictive control techniques are implemented to improve the performance of the boost converter. Due to the chattering effects, the higher...

This paper proposes analysis and control of a single-phase power factor corrector (PFC). The proposed control is capable of achieving a unity power factor for each DC link voltage or load fluctuation. The method under study is composed of two intelligent approaches, a fuzzy logic controller to ensure an output voltage at a suitable value and predic...

In this paper, A Shunt Active Power Filter (SAPF) is implemented using a dSPACE DS1104 processor to compensate harmonics and reactive power produced by nonlinear load. The reference source current is computed based on the measurement of harmonics in the supply voltage and load current. A hysteresis based current controller has been implemented in a...