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This paper describes the design and prototyping process of outer rotor permanent magnet generator meant for the use in small scale wind turbines. The initial design of the machine is presented. Main issues and phenomena, affecting the generator design, such as cogging torque and its reduction possibilities, selection and demagnetization risk assessment of permanent magnets, machine losses and thermal...
In this work, a hybrid system has been simulated and optimized, this system is composed with three generators, two on renewable energy (solar and wind power) and a diesel generator. This central distributes energy to a small village in southwest of Algeria named “Timiaouine”, this central has been sized using mathematic parameter and repartition of consumption for 24 hours in both seasons; winter...
In this paper, wind generator modeling is presented including the algorithm for maximizing the extracted power. The DFIG stator winding is directly connected to the utility grid and the rotor winding is connected via a back to back converter. The oriented flux control allows the machine to follow the set points of active and reactive power.
This paper presents a feedback Takagi-Sugeno Fuzzy control in finite frequency for wind energy conversion systems (WECS) improved by artificial neural network. The wind energy conversion system model is represented by a Takagi-Sugeno fuzzy (TSF) model. The finite frequency approach is proposed to control the closed-loop system in an operating finite frequency domain. However, when the external perturbations...
This paper presents a comparative analysis of three control algorithms for a wind turbine generator using a variable speed permanent magnet synchronous generator (PMSG). The design methodologies of the conventional PI-based controller, the Taylor series expansion linear approximation based (TSLA-based) controller and the feedback linearization based (FL-based) nonlinear controller are provided. The...
The whole world is focusing on the utilization of renewable energy sources in order to mitigate the world power crisis. Power electronics is being used in a large scale for the renewable energy conversion in a more efficient manner. It has a great impact on controlling as well as interfacing the renewable system with both the grid and standalone applications. Hence more and more emphasis is given...
In this proposed paper, the system aims that in wind power generation a powerful optimization technique can profitably maximize energy extraction at given wind farms. Maximizing the extraction of wind can be achieved with the Particle Swarm Optimization (PSO). Maximizing wind energy extraction of PSO applied to common Constant frequency (CF) set-up instead of using Variable frequency (VF) set-up....
Energy is very important for a country for both its economic growth and socio-economic development. The main source of energy is fossil fuels. However, the use of fossil fuels has severe effects on environment like emission of greenhouse gasses. These diverse effects have leads to the demand of renewable energy resources. Renewable energy sources like wind, solar, hydro based energies, etc. are environment...
This paper presents the experimental investigation of power quality (PQ) disturbances associated with the grid integrated wind energy generator. PQ disturbances associated with the grid synchronization and outage of doubly fed induction generator (DFIG) based wind energy generation system have been investigated in the presence of various types of loads. The voltage signal has been captured at point...
This paper introduces a new transformerless converter topology for Multiphase-Based Wind Energy Conversion Systems (WECSs). In this topology, a twelve-phase induction generator is integrated to the grid using dual Nine-Switch Converters (NSCs) connected in series forming a high voltage cascaded dc-link. For this generator phase number, this topology reduces the total number of semiconductor devices...
The objective of the proposed scheme is to extract the maximum power at different wind turbine speed. In order to achieve this, MPPT controller is implemented on the rectifier side for the extraction of maximum power. On the inverter side normal closed loop PWM control is carried out. MPPT controller is implemented using fuzzy logic control technique. The fuzzy controller's role here is to track the...
In order to take full advantages from renewable energy sources; we propose combination between a wind power source and a pumped storage hydro power station taking into account electricity market framework. A scenario is proposed which defines programmed power demand and energy price. An operation optimization scheduling strategy is integrated. This strategy of scheduling requires in priority wind...
The combination of many kinds of renewable energy sources, such as solar power, wind energy with the integration of batteries and diesel generators in the system, is widely used as an alternative energy source in remote areas. Solar and wind energies are widely available in the Southeast Region of Turkey. Therefore, a province situated in the southeastern of Turkey can be autonomous and provide its...
This work deals with the control of the wind energy conversion system (WECS) equipped with two doubly-fed induction generators (DFIG). The main generator is controlled in order to keep the voltage and the frequency in the rates values. The second generator is connected when the power demand increase. But, before the connection, with the first generator, synchronization is done. After that, the system...
Day after day, wind energy is cutting wider segment of energy market. Its clean nature and low running cost make it a good competitor for the traditional and the other renewable energy sources. The electrical generator is the key component of the wind energy generating system. Properly designed generator can maximize the energy gain. Axial field permanent magnet synchronous generator is the choice...
Microgrid is becoming one of the popular architectures for accommodation of distributed energy sources into conventional distribution network. A microgrid structure consists of various renewable energy sources which includes non linear solid state devices for interfacing. Presence of non-linear components in distribution network may change the behavior of main utility grid both under steady and transient...
The continuous rise of energy demand worldwide combined with the decrease of natural resources such as fossil fuel represents a huge energy problem which facing humanity. Industry as well as consumers must rethink how to produce and use energy at low cost price. Renewable Energy (RE) applications and energy savings are keys to meet this challenge in a sustainable way and reduce the percentage of carbon...
This paper presents results from case studies of the future power systems in Morocco and Egypt, with a high increase in renewable generation capacity. Datasets representing 2030 scenarios have been generated and studied with a simplified grid-market model that takes into account variable renewable generation, energy storage and electricity grid constraints. Simulation results for Morocco and Egypt...
Wind energy acquires reputation since the previous few decades. The importance of wind energy topic leads new investigation ranges due to the operation of turbines. The operation of the turbine mainly occurs in the generator. In this study, a MATLAB/GUI (Graphical User Interface) has been developed to compare the differences between the generator types used in wind turbines. The effect of each generator...
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