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The main purpose of many industrial applications is including control techniques which combine simplicity, robustness, and efficient performance in order to obtain a speed response characterized by fast dynamic, small overshoot, and resistance to disturbances. This combination is achieved through the proposed structure in this paper, where the conventional proportional integral (PI) controller is...
Fast depleting reserves of fossil fuels, increasing the cost of fuel for conventional power generation, the use of renewable sources of power generation has become an inevitable reality. The paper makes a feasibility assessment of standalone hybrid renewable energy system based on (PV/Wind/Battery) as a possible source to electrification for an education institution namely Mohammadia School of Engineers...
in this study, three models namely the linear coefficient model, the Standard ASTM E2527 and the Sandia National Laboratories model, among some methods of the prediction of maximum power have been adequately selected to investigate the performance of a High concentrator photovoltaic (HCPV) system, upon atmospheric conditions such as the direct normal irradiation DNI, the ambient temperature, the wind...
The induction machine operating as a generator in isolated areas has received considerable attention in recent years, however the main drawback is poor voltage control when speed and load change. This paper present indirect vector control strategy for both SEIG and induction motor-(self excited induction generator feeding induction motor for different use) using classical regulator proportional integral...
This paper purposes to present a sensorless indirect field oriented control (IFOC) commanded by a space vector algorithm (SV) in goal to guarantee fast response in one hand, and to improve the dynamic performance of a three-phase squirrel cage induction motor drive (SCIM) in the other hand. This numerical algorithm is used by the pulse width modulation (PWM) in order to obtain a control sequence of...
This paper presents a more relevant infrastructure: fuzzy sensorless direct field oriented control (FDFOC), compared to the usual sensorless direct field oriented control (DFOC), in order to improve the induction motor (IM) performance at low speeds. In the FDFOC, a fuzzy logic adaptation mechanism based Luenberger observer used for speed adaptation is adopted, and all the proportional-integral (PI)...
This paper presents a comparative study of wind turbine control based on Doubly Fed Induction Generator (DFIG) under unbalanced grid voltage using an Proportional-Integral (PI) and backstepping intelligent controllers. The traditional PI controller is more sensitive to the grid disturbances; however the simulation results showed that the backstepping design is characterized by a high rejection to...
This paper deals with standalone small power generation employing three self-excited induction generators under varying speeds feeding an isolated load. The proposed system utilizes three-level cascaded H-bridge inverter for the three generators. The control scheme has the capability of regulating the output voltage for balanced operation of a three-phase isolated load under variable speed. The proposed...
In this study, an embedded system based on Fuzzy-Logic Control (FLC) method has been developed to improve the accuracy and reactivity of a dual-axis tracking system, in order to increase the output power of panel and minimize the inertia on the dc motor. Linguistic system definitions of FLC are converted into control rules based algorithm and then implemented on PIC Microcontroller 18F4550 to monitor...
This paper aims to present a sensorless indirect field oriented control (IFOC) associated with an intelligent technique based on fuzzy logic controllers (FLC) in purpose to guarantee fast response and to improve the dynamic performance of a three-phase squirrel cage induction motor drive (SCIM). These regulators are used instead of the classical IP ones and are applied in speed and stator currents...
This paper aims to address the Doubly Fed Induction Generator (DFIG) problems integrated in the wind energy conversion system (WECS) and connected to the power network. As a result, the performance of the wind integration under unbalanced grid operations has been improved. Indeed, the main inconvenient when using DFIG, is its large sensitivity to the grid disturbances, especially in the case of voltage...
The purpose of this paper is to address improvement of the dynamic and load torque rejection of the indirect field oriented control (IFOC), of an induction motor (IM), by replacing all proportional-integral (PI) controllers with intelligent components: fuzzy logic controllers (FLCs). The controllers substituted, are those of the speed and the stator currents of the IFOC. The performance of the proposed...
In this paper, an improved Multi-objective Particle Swarm Optimization (MOPSO) of a Smart-grid energy flow in order to achieve the lower cost of the consumed energy is presented. The Smart-Grid is provided with different energy sources: fossil energy sources, renewable energy sources (photovoltaic panels, wind turbines…) and consumers' network. The used algorithm is based on the approach of Multi-objective...
The controllability of the electrical production is the main problem of renewable energy generators due to uncontrollable meteorological conditions. This study examines the feasibility for an isolated small power generation based on renewable energy source able to supplying different type of loads AC and DC with regulated voltage. The complete system is modelled in Matlab\Simulink with three closed...
In an isolated and rural locations where the energy is derived from renewable sources, the load will suffer from large fluctuations due to the unpredictable nature of the underlying phenomena (wind or solar). This paper presents the implementation of practical control for standalone renewable energy source able to feed an isolated load with regulated voltage and satisfactory energy quality in remote...
This research aims to present a sensorless direct field oriented control (DFOC) with intelligent technique based on fuzzy logic controllers (FLC) to obtain fast response and to improve the dynamic performance of a three-phase induction motor drive (IM). These regulators are applied in speed, flux and stator currents control of induction motor. A Luenberger flux observer and speed adaptation are associated...
This paper deals with the problem of controlling aeorogenerators consisting of a doubly fed induction generator (DFIG) coupled to a wind turbine. It is well known that fixed speed operation entails nonoptimal energetic efficiency of the aerogenerator. Various solutions have been proposed to achieve an optimal varying speed control. However, in most controllers it is require that wind speed distribution...
Self Excited Induction Generator (SIEG) has become a focal point in the research of standalone renewable energy sources. This paper investigates the capacity and the applicability of self excited induction generator feeding an isolated non linear load (induction motor coupled with variable mechanical load) in order to exploited in the remote areas as wind electric pump system for different application...
This paper presents a comparative study of an indirect field oriented control (IFOC) of induction machine (IM) using an integral-proportional (IP), sliding mode (SMC) and intelligent technique based on a fuzzy logic (FLC) controllers for speed regulation. The traditional integral-proportional controller is sensitive to the load torque disturbances. The fuzzy logic control is a part of intelligent...
This paper presents a intelligent controller based on fuzzy logic to the terminal dc voltage control of the system composed of the variable speed wind associated a self-excited induction generator. The Indirect Rotor Flux Oriented Control (IRFOC) technique is used to ensure the DC-bus voltage regulation when change in speed and load condition. The Fuzzy logic controller constitutes a powerful tool...
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