Ilhami Colak

• PhD
• Professor (Full) at Nisantasi Üniversitesi

Currently, one of the main challenges of solar photovoltaic (PV) systems is to optimize their energy efficiency. Solar panels and dc-dc converters controlled by maximum power point tracking (MPPT) techniques are the two main components of a PV system. To optimize the production of the PV installation, the converter holds pivotal significance. Given...

The main objective of this paper is to propose a modified structure for a SEPIC-type DC-DC converter and to compare it to the simple structure. An incremental conductance (INC) MPPT controller is chosen and applied to both converters in order to extract the maximum available power. The modified converter structure is obtained by adding an inductor...

The idea presented in this article involves the simulation of the distribution of field lines in a rod-plane system with a glass tubular barrier, using COMSOL Multiphysics software. This simulation aims to better understand and predict the behavior of the electric field in a system where the electrode geometry creates a non-uniform field. To valida...

This paper proposes an efficient strategy for energy control in the isolated micro grid, comprising photovoltaic and wind power systems with battery storage systems. This strategy presents smart energy management (SEM) based on artificial intelligence techniques (AIT) such as the fuzzy logic controller (FLC). The SEM is designed to manage energy fl...

Developing new trends and technologies for power line inspection is critical for smart grid reliability. Due to the drawbacksof traditional power line methods, such as time consumption, high costs, and risks to workers’ safety, innovative technologies like flying robots need to be incorporated.Trajectory planning is crucial for optimizing path and...

Abstract—This paper shows a different controller procedure for power electronics converters that insert in the grid energy generated by renewable sources like photovoltaic or wind turbine, into micro-grids. Virtual Synchronous Generators (VSG), the name of the category of these smart converters, work in cooperation with main grid or in lonely and s...

To ensure good water quality, microbiological contamination in water must be detected. This process is made easier and more distinctive by using a photonic crystal fiber (PCF), which offers outstanding optical sensing capabilities. In this work, a PCF sensor model is proposed for detecting two types of waterborne bacteria, namely Vibrio Cholera, an...

In this study, a photonic crystal fiber (PCF) sensor is proposed for refractometric sensing. The proposed PCF sensor includes a single rectangular core and 32 rectangular air holes in the cladding region that have the same width and height as the core rectangle. The fiber substance used is Zeonex. The finite element-based COMSOL 5.6 program is used...

Generating electricity near the consumption can provide more flexibility to supply various services to consumers as well as reduce system losses. The limited fossil fuels and air pollution are among the main incentives for the expansion of this technology. One of the perspectives proposed for effective increase in these resources’ involvement is to...

The limited fossil fuels and air pollution are among the main incentives for the expansion of this technology. Producing electricity near the place of consumption, in addition to reducing the system loss, can create more flexibility to provide a variety of services to consumers. One of the perspectives proposed for effective increase in these resou...

MXene (Ti3C2Tx) has emerged very recently as an interacting material for surface plasmon resonance (SPR) configuration. It was discovered that Ti3C2Tx can facilitate the adsorption of biomolecules due to its higher binding energies, stronger interaction between matter and light, and larger surface area. In this work, a two-dimensional Ti3C2Tx and s...

MXene (Ti3C2Tx) has emerged very recently as an interacting material for surface plasmon resonance (SPR) configuration. It was discovered that Ti3C2Tx can facilitate the adsorption of biomolecules due to its higher binding energies, stronger interaction between matter and light, and larger surface area. In this work, a two-dimensional Ti3C2Tx and s...

Several simulation studies of maximum power point tracking (MPPT) algorithms of solar systems are presented in the literature in order to purpose and explaining the advantages and disadvantages of each technique. The development of hardware technology has enabled us to easily implement and validate these techniques. The execution of the MPPT method...

The first advantage property of sliding mode control (SMC) system is the robustness about internal/external disturbances, but the main inconvenient of this control theory it's the chattering phenomenon caused by a non-ideal switching action. The main objective of this paper is to develop a decentralized hybrid fuzzy-sliding mode controller (DHFSMC)...

A refractometric and low-temperature sensor based on a simple one-dimensional binary photonic crystal is investigated. The photonic crystal consists of alternating layers of superconductor and air. The principle of operation of the proposed sensor is as follows: the refractive index of the air layer or the temperature is changed by a very small amo...

In this paper, a modified version of Imperialist Competitive Algorithm (ICA) is proposed for the optimal energy management of a Microgrid (MG) with Parking Lots (PL) and Distributed Generation (DG) units. A 24-h scheduling for participation in DG units and electric vehicles PLs in two scenarios is done. The PLs are divided into seven group that eac...

Cancer is a fatal disease that leads to the death of many people all over the world. The detection of cancer disease is one of the most challenging in the medical field. A novel sensor based on a one-dimensional ternary photonic crystal is proposed for the detection of cancer cells. The proposed structure consists of a defect layer sandwiched betwe...

Technology advancement in power–electronic interfaces and their evolution open an opportunity to end-users to benefit from their newfound capability. For the end-users, power–electronic interfaces can act as Distributed Energy Resources (DERs) for reactive power injection and absorption. If these power–electronic interface capabilities can be prope...

Tuberculosis is a widespread disease all over the world. Early diagnosis plays a crucial role in the treatment of patients and can reduce the mortality rate. A new biosensor based on a binary photonic crystal is designed for the detection of mycobacterium tuberculosis bacteria in the blood. The structure air/(A/B)N/(Defect)/(A/B)N/air is employed,...

A slab waveguide that comprises a linear substrate, an exponentially graded-index guiding layer, and a power-dependent refractive index covering medium is investigated. All layers are assumed dielectric. The guiding film index is described by a function $n(x)$ n ( x ) , which changes exponentially from the cover-film interface to the substrate. The...

Volatility leads to disruption in synchronism between generators of a continuous system. The frequency of the volatility is usually between a few tenths of Hz to several Hz. This volatility is sometimes divided into two types, local and interregional. Local volatility is the low-frequency volatility of a power plant unit or units of a power plant r...

Today, thermoelectric generators(TEG) are of great interest since their prices are falling and more areas of applications have appeared. In order to increase the TEG’s low voltage and to enhance performance of the thermoelectric power conversion system, this paper presents a direct adaptive sliding mode MPPT based on incremental conductance (INC)...

Cancer is a disease that takes place when human cells grow uncontrollably. When detected and cured early, it can be non-life-threatening. It becomes life-threatening in case of late discovery where it affects the ability of an organ to function. In this work, a symmetric slab waveguide sensor is analyzed for the detection of cancer cells. The cover...

With the growing demand for electricity, the inability of governments to provide the necessary resources to invest in the electricity industry and the rising price of fossil fuels, the tendency is to study and pay attention to economic issues in power systems studies. In this paper a new modified version of gray wolf optimization (MGWO) is proposed...

Full capacity cannot be exploited in power systems for various reasons, including voltage constraints and various types of stability. Creating a competitive open market in refurbished systems requires that the maximum capacity of the lines be used. Using the maximum capacity of the lines may cause overload on some lines beyond their capacity. This...

The use of renewable energy sources in energy distribution networks as distributed generation sources for dispersed and low consumption loads in remote areas such as remote villages and islands with low population can be a proper solution for reducing economic costs, reducing environmental pollutions and increasing energy efficiency. The purpose of...

We propose a surface plasmon resonance (SPR) biosensor that consists of six layers: glass prism (SF 10), chromium, metal, molybdenum disulphide, graphene, and sensing medium. A seventh layer is added between the glass prism and the chromium layer, which is a gap filled with plasma as a dielectric material. The plasma layer is expected to carry the...

Fuzzy logic controller (FLC)-based maximum power point tracking (MPPT) or simply fuzzy MPPT technique has attracted a large interest because it allows a more human approach to control and shows good performance compared to conventional techniques. However, in spite of the many advantages of the fuzzy MPPT, the design of this controller remains a di...

In this article, a control method called DTC is proposed for a Doubly Fed Induction Generator for power generation from variable speed wind. The objective is to control the torque and rotor flux of the DFIG directly through the inverters. Conventional DTC control (C-DTC) has the problem of a harmonic rate for the currents generated by the DFIG, bec...

A binary superconductor-dielectric photonic crystal (PC) is proposed. The PC has the structure (AB) N with layer A representing the superconducting layer and layer B the dielectric material. The transfer matrix technique is used to deduce the transmission coefficient through the PC. The properties of photonic bandgaps (PBGs) arising in the transmis...

In a recent study, the authors proposed an optical broadband angular reflector having a band selective feature and high reflectivity rate for possible applications in photovoltaic applications using a binary photonic crystal. The obtained 100% reflectivity regions for TE and TM modes were in bandwidths of 244 nm and 134 nm, respectively. In this pa...

A photonic crystal (PC) having the structure (AB)NA is investigated. A and B are superconductor and dielectric layers, respectively. P-polarized (TM) wave is assumed to be incident on the PC. The transmission of TM waves through the PC is studied with a focus on photonic band gap (PBG). The change in the PBG is studied with the variation of differe...

The use of renewable energies has increased in these last decades. The wind energy attracts more attention of several research studies. The control of the power generated by the wind turbine is very complicated. It requires the application of new techniques of control. This paper presents an application of Model reference adaptive system (MRAS) in...

Existing monitoring and control of an induction motor systems must be interoperable with next generation products to ensure smart integration in order to update existing system by reducing the cost and increasing the reliability. The best method must be chosen for efficient use of energy in some cases such as speed control, switching-on or switchin...

Traditional H-bridge inverters are composed of four switches controlled with any SPWM strategy, such as bipolar, unipolar, or hybrid. Among these methods, the bipolar SPWM reduces the leakage current by providing constant CMV. Researchers have proposed some alternative multilevel inverter topologies to overcome drawbacks seen in isolated and noniso...

Renewable energy sources such as solar, wind, tidal, or biomasses are utilized to generate electrical energy without CO2 emission. Most of the generated energy, either AC or DC, is requested to be converted to AC for industrial use. Inverters, which are studied for achieving higher efficiency and reliable systems, are classified based on output vol...

The development of renewable energies remains today, a necessity for Algeria due to the growing deficit in the energy balance which was increased 8 times between 2010 and 2018, now representing 35% of energy demand. Renewable energies have long been one of the priorities of public authorities not only to avoid the expenditure of hydrocarbons but al...

The world faces a big issue at power generation level due to the energy crisis, which is caused by the shortage of fossil fuels and the rise of global energy demand. Thus, most countries are considered the renewable energy resources as an efficient solution for the global energy crisis. This article focuses on the main contributions of Renewable En...

Low frequency modulation strategies are a good solution to increase the energy conversion efficiency in high power applications. The paper is devoted to presents an innovative way to low order harmonics mitigation for seven-level Cascaded H-Bridge Inverters. In particular, this approach is based on the mitigation of selected harmonics without solve...

The basic P&O technique fails to track the MPP when a rapid change in luminosity and/or temperature has occurred because it cannot distinguish between disturbance of PV voltage and rapid change in environmental conditions. This study presents drawbacks of the basic algorithm and proposes a new variant of P&O with three incremental steps to differen...

This paper presents a robust power control strategy using fractional order proportional-integral FO[PI] controller to enhance the performences of power control of a doubly fed induction generator (DFIG). In this paper, a new analytical design method is proposed and used to design FO[PI] controllers. The FO[PI] controllers designed in this way impro...

The design of DC-DC step-down converter employing sliding mode strategy with Proportional-integral (PI) controller is discussed in this work. The control method uses the inductor current error as a sliding surface followed by a PI controller to regulate the output voltage. The performance of the studied system is examined beneath sudden changes of...

Photovoltaic (PV) plant as a part of a smart grid system is investigated in this work. Tracking the maximum available power of the PV panel is essential and it is possible by various maximum power point (MPP) methods. Most of these methods are iterative, time consuming and do not work well in quickly changing environmental conditions. The presented...

Smart grid systems are complex and huge power networks including many digital components and assets. These systems provide opportunities to operators to collect data remotely from customers and manage their network reliably and effectively. Therefore, the operators can track and analyze historical and immediate power consumption data, and take nece...

Knowing that a large number of MPPT (maximum power point tracking) techniques exist so far and that each technique has its own advantages and disadvantages. Therefore, an appropriate examination of these techniques is indispensable to facilitate the selection of one of the more appropriate ones for a given application. This document provides a summ...

The performance of a solar energy system can be better by inserting a smart power converter with an appropriate MPPT control between the PV source and the load. The smart converter or the well-known as power conditioning unit (PCU) is employed to maximize the power extracted from the solar panel by real-time impedance matching, and to regulate the...

With the development of power electronics, directly driven permanent magnet synchronous generators (PMSGs) have attracted increasing interest from wind turbine (WT) producers because of their benefits over other variable speed WTs. PMSGs have a big number of poles and competitive costs. In this article simplified model and real modeling of a small...

Hybridization of solar panels with thermoelectric generator (PV/TEG) is a subject of actuality; this article proposed a configuration combining these two sources for the production of electricity from solar radiation and lost heat in order to have optimal performance. Since the hybrid PV/TEG system has two input sources, and then a double-input boo...

Abstract— The efficiency of solar photovoltaic (PV) systems can be improved via the insertion of an intelligent peak power converter (IPPC) which is capable to maximize the power generated from each PV array by real-time impedance matching. IPPC devices are DC-DC converters with an appropriate control strategy. Selecting one structure over another...

In the last decades, researches on speed control of electric motors have been very important in industrial systems. On the other hand, the development of power electronics and semiconductor technologies has expanded the scope of the AC and DC machines. However, the separately excited DC motor is widely used in the field of variable speed applicatio...

This paper discusses the use of the concept of classical and predictive direct power control for shunt active power filter function. These strategies are used to improve the active power filter performance by compensation of the reactive power and the elimination of the harmonic currents drawn by non-linear loads. A theoretical analysis followed by...

The dynamic modeling of batteries used in photovoltaic systems (PVS), exceptionally in stand-alone or microgrid systems, is considered as an important issue and a major problem for the monitoring and simulation and even for fault detection applications. In this work, we propose as first step an enhancement of CIEMAT model by the improvement of 21 c...

This paper presents a sliding mode control (SMC) approach to a novel high output gain SEPIC converter. Power circuit of the conventional SEPIC converter is modified with an inclusion of single inductor and capacitor which improves the efficiency and output gain. Conventional PI type controllers are very common solutions for DC-DC converters. Howeve...

The calculation of high‐frequency model parameters of a winding is crucial for the integrity assessment of transformer winding damages and its severity. Bat algorithm (BA) is one of the modern and efficient methods used in computational intelligence due to its efficiency to obtain better results for complicated non‐linear problems. In this study, a...

Nowadays, thermo electrical (TE) modules are increasingly popular because their prices go down and new potential applications have emerged. This paper presents modeling, simulation, and control of the power generation of a thermoelectric generator (TEG) using Matlab/Simulink. To get the aim of maximizing the power from the TEG, an MPPT controller b...

The purpose of this document is to give a wide-ranging comparison between different photovoltaic (PV) maximum power point tracking (MPPT) methods. The MPPTs considered in this work are perturb and observe (PO), incremental conductance (IC), sliding mode (SM), and fuzzy logic (FL) tracker. A model of MSX 60 solar module and the different MPPTs appli...

This paper presents a design and a real time application of an efficient adaptive neural-fuzzy inference system based voltage controller for a single-phase boost unity active power factor correction in order to improve its performances. Basically, the adaptive neural-fuzzy inference system is a combination of fuzzy logic and artificial neural netwo...