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Extremum seeking control (ESC) can be utilized as a maximum power point tracking (MPPT) method that optimizes the operating point of a wind energy system by adjusting the wind turbine's rotor speed according to the change in the wind speed. Although ESC has a tracking ability and quick response capability that is better than those of the conventional MPPT methods, it increases the mechanical vibration...
This paper is focused on challenges related to an increased quantity of distribution energy resources connected to the distribution network within the context of newly defined requirements ENTSO-E, follow-up European standards TS 50549 and codes of distribution system operators on regulation of voltage through control of the reactive power in terms of P-Q diagram. A high number of connected and operated...
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...
Renewable Energy Systems are becoming a common choice for small communities in Canada where the cost of diesel fuel is high. In this paper, a PV/Wind hybrid system is being considered for supplying an electrical load of a Mobile office which is proposed and presented along with relevant statistics. An optimal configuration of different renewable energy system is being obtained. The optimal configuration...
Wind energy use has shown a remarkable increase in last years. In order to achieve the highest efficiency with the best characteristics in wind turbines, it is necessary to analyze relevant factors in wind energy conversion. In this review a state of the art is presented focused on modeling, constitutive elements, structure and control of wind generation systems and the increasing use of wind energy...
The use of wind energy as a source of electrical energy is increasing along with the limited fossil energy and increase environmental awareness to the greenhouse effect. This paper presents the modeling and control of permanent magnet synchronous generator (PMSG) for wind turbines. To get optimal power, the generator must be able to rotate at the optimum speed so that it is required speed controller...
In this paper the analysis of Doubly Fed Induction Generator (DFIG) based Wind Energy Conversion System (WECS) is carried out and simultaneously the behavior of DFIG based WECS under normal and abnormal condition is discussed. At rotor side during abnormal condition it is observed that the dc link voltage and rotor speed of DFIG wind turbine increases, whereas the terminal voltage and the active power...
There is a trend to build wind turbines in large wind farms and in the near future to operate such a farm as an integrated power production plant. Predictability of individual turbine behaviour is key in such a strategy. In order to minimize the influence on the balance of the electricity grid it is necessary to have stable electricity production by each of the turbines. Hence all turbines should...
In recent years, concern has grown towards renewable energy sources particularly wind energy for the production of electricity. The scientist and researchers have gone through rigorous study and experimentation to search the solution for fruitful utilization of wind energy. Our day to day activity is heavily based on energy, hence the work towards energy research is highly important and sensitive...
The goal of this paper is to investigate the application of nonlinear control technique to a multi-input multi-output (MIMO) nonlinear model of a wind energy battery-storage system using a permanent magnet synchronous generator (PMSG). The challenge is that the system should operate in both grid-connected and standalone modes while ensuring a seamless transition between the two modes and an efficient...
This paper presents an automated system applied to a dc machine used to the emulation of aerodynamic torque of a distributed generation power plant. The experimental arrangement proposed aims to avoid the wind turbine dependence of climatic variations. In order to evaluate the proposed approach, we presented a set of experimental results.
Interest in using magnet-less switched reluctance generators for wind turbines applications continues to gain popularity. Mainly due to unstable price of the magnet raw material that is one of the main challenges for engineers to forecast the final cost of the wind turbine. This paper presents design of a direct drive switched reluctance generator (DDSRG) for wind turbine applications using Finite-Element...
A new single stage AC to AC converter has been designed in a grid-connected wind energy conversion system which changes the variable-frequency AC output of electrical generator into a constant-frequency supply which can be fed into an electrical grid. The single stage converter eliminates multistage operation, the DC-link filter elements and thus resolves the size, weight and reliability issues. The...
A method to estimate the model parameters of a small wind turbine is proposed in this paper. The method highlights an experiment in which the wind speed, the generator angular speed and the real power consuming by the load are registered. A fifth order polynomial to represent the ratio between the power coefficient and the tip speed ratio is obtained from the registered data. The proposed method does...
Short circuit and ground failures that are quite common in power transmission lines are investigated. These failures are designed considering a system that is supplied by this wind system, analysis are interpreted. In the study, a system is set up and it is fed by the wind turbine. Furthermore, the mathematical model of wind turbine and generator is prepared and the results obtained from the simulation...
The use of renewable energy sources are increased because of the depletion of natural resources and the increasing pollution level from energy production. The wind energy and the solar energy are most widely used among the renewable energy sources. Power electronics is needed in almost all kinds of renewable energy system. It controls the renewable source and interfaces with the load effectively,...
This paper details the study of permanent magnet synchronous generator (PMSG) for wind turbines and its control for maximum power point tracking, while connected to a High Voltage Direct Current (HVDC) bus using a 12 pulse thyristor network. The connection to the HVDC bus is done without the use of a back-to-back converter for the PMSG, reducing the complexity and cost of the PMSG power converter...
This paper presents the modeling of wind energy systems using MATLAB Simulink. The model considers the MPPT (Maximum Power Point Tracking) technique to track the maximum power that could be extracted from the wind energy, due the non-linear characteristic of the wind turbine. The model consists of wind generation model, converter model (DC-DC converter), and MPPT controller. The main contribution...
Battery energy storage system (BESS) is to be incorporated in a wind farm to achieve constant power dispatch. The design of the BESS is based on the forecasted wind speed, and the technique assumes the distribution of the error between the forecasted and actual wind speeds is Gaussian. It is then shown that although the error between the predicted and actual wind powers can be evaluated, it is non-Gaussian...
This paper presents an optimized stochastic formulation for the economic dispatch problem of power system including wind power based on both short-term and long-term behaviour of the wind speed and wind power in a specific area. And according to the formulation, a multi-objective optimization formula is given to be used in the economic dispatch problem. The multi-objective optimization problem applies...
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