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The manufacturers of small wind turbines generally provide basic parameters of their products, resulting in increased uncertainty upon evaluating the performance of small wind turbines. Therefore, the useful and accurate modeling of a small wind turbine is significant. This work discusses the modelling and control of a small wind turbine. The basic topology design and control principle for small wind...
This paper deals with design and control of a connected wind energy generation system employing a Permanent Magnet Synchronous Generator (PMSG) driven by a variable speed wind turbine feeding single-phase loads. The proposed energy conversion system makes use of asymmetric NPC five level inverter. The dc terminal of the generator connected rectifier is tied to a boost converter for Maximum Power Point...
A new method for a variable-speed wind turbine using a permanent-magnet synchronous generator (PMSG) is simulated. The system includes a power conditioner which consists of a diode rectifier powered by a phase shifting transformer and it is then cascaded to a pulse width-modulated (PWM) voltage source inverter. The simple maximum power point tracking (MPPT) control strategy determines the optimal...
In this paper, a high frequency (HF)-based three-phase Semicontrolled rectifier-current source inverter system is proposed for grid-connected permanent magnet wind generators. The main advantages of the topology are: high efficiency due to less power losses and reduced number of switching elements, high output power density realization, reduced passive component ratings proportionally to the frequency,...
This paper introduces a study for the small wind energy conversion system (WECS), which aims to select the optimum design parameters to achieve high performance system. The main features of the studied system are high efficiency, operation at maximum power point tracking (MPPT) and long battery lifetime. The Permanent Magnet Synchronous Generator (PMSG) operates at variable wind speed and it is connected...
Permanent magnet synchronous generators (PMSGs) are commonly used as a variable speed generator in wind energy systems. This paper describes a maximum power point tracking (MPPT) scheme for a PMSG-based wind energy conversion system (WECS) in which a buck-boost converter is used to handle a wide range of wind speeds. A closed-loop with a PWM inverter forces the WECS to extract the maximum power available...
This paper proposes a maximum power point tracking (MPPT) technique for variable pitch wind generators with induction machines, which can suitably be adopted in both the maximum power range and the constant power range of the wind speed. To this aim, an MPPT technique based on the Growing Neural Gas (GNG) wind turbine surface identification and corresponding function inversion has been adopted here...
Today, a characteristic of the operating regime of small wind turbines is that they do not obtain the maximum power efficiency. Taking into account that that the operability margin can, in general, be enhanced, this paper sets out to develop algorithms designed to extract the maximum power. First, an analysis is made of existing algorithms and as a result, a new algorithm is proposed to track the...
This paper presents the emulation of grid-connected wind energy conversion system based on the 30 MIPS Digital Signal controller (DSC) dsPIC30f3011. This system is composed by a three-phase permanent magnet generator, an AC to DC converter and a single phase Voltage Source Inverter (VSI). The inverter was driven using Space Vector Pulse Width Modulation (SVPWM) at a switching frequency of 18 kHz and...
This paper analyzes the operation of small wind turbine system with variable speed Permanent Magnet Synchronous Generator (PMSG) and a Lead Acid Battery (LAB) for residential applications, during wind speed variation. The main purpose is to supply 230 V/50 Hz domestic appliances through a single-phase inverter. The required power for the connected loads can be effectively delivered and supplied by...
The wind power varies mainly depending on the wind speed. Many methods have been proposed to track the maximum power point (MPPT) of the wind, such as the fuzzy logic (FL), artificial neural network (ANN) and Neuro-Fuzzy. In this paper, a variable speed wind generator MPPT based on artificial neural network (ANN) is presented. It is designed as a combination of the generator speed forecasting model...
Modulation and control of a cascade multilevel inverter, which has a high potential in future wind generation applications, are presented. The inverter is a combination of a high power, three level ??bulk inverter?? and a low power ??conditioning inverter??. To minimize switching losses, the bulk inverter operates at a low frequency producing square wave outputs while high frequency conditioning inverter...
An ac/dc/ac power converter is an important component to extract power from a variable speed permanent magnet wind generator and feed into the grid. This paper describes such a converter incorporating maximum power point tracking based on power fed to the grid at different wind speeds. Using the permanent magnet generator voltage, the grid current and the grid voltage samples, the proposed system...
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