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Wind power plant installations continue to increase worldwide because it is a kind of renewable and harmful emissions-free energy source. The increased capacity of wind power needs the new strict requirements related to the grid connections of wind generators. The requirements defined in the grid codes can be states as reactive power control, fault ride-through (FRT) capability of the wind turbines,...
A detailed model of a full-conversion wind turbine (WT) is presented in this article. The developed model uses cosimulation by several freeware WT simulation tools-such as the turbulent wind simulator (TurbSim) and Fatigue, Aerodynamics, Structures, and Turbulence (FA ST), both from the National Renewable Energy Laboratory (NREL)-and commercial software to perform a detailed analysis of all WT components...
The short circuit behavior of Type I (fixed speed) wind turbine-generators is analyzed in this paper to aid in the protection coordination of wind plants of this type. A simple network consisting of one wind turbine-generator is analyzed for two network faults: a three phase short circuit and a phase A to ground fault. Electromagnetic transient simulations and sequence network calculations are compared...
Wind energy, a kind of renewable and clean energy, is widely studied nowadays. Directly driven wind turbine permanent magnet synchronous generator (D-PMSG) plays an important role in the modern wind generating systems. A reliable and speedy simulation of the wind directly driven permanent-magnet synchronous generator is significant. By replacing the power electronic device with math equivalence, it...
A DFIG-based wind generator electromagnetic transient model is established on the RTDS platform in this paper. Stator flux oriented vector control scheme is adopted to achieve power decoupling control in the DFIG based wind model. In order to research the impact of the wind farm on the existing protection relay of the network, this paper establishes single machine electromagnetic dynamic equivalent...
Increasing fault current contribution from wind farms into the utility network presents new engineering challenges for utility protection engineers. Traditionally, sequence component networks are used to calculate fault currents for relay settings, but there is at present uncertainty on the appropriate sequence component models of the various wind generator types for inclusion into protection calculation...
The study on brushless doubly-fed generation system is a promising development in VSCF system. The generator, as the key part of wind power generation system, plays very important role. Based on the analysis of the structure and principle of the brushless doubly-fed generation system, the mathematical model under rotor reference frame (d-q axis) is derived, and the simulation model is established...
Wind power generation is one of renewable energy which save natural resources and lower the global warming speed. A negative aspect of the wind power generation is that the output voltage changes as the wind power changes. To smooth the output of the wind power generation, rechargeable battery is used. In this paper, Electric Double Layer Capacitors (EDLCs) are employed to smooth the output of wind...
This paper focuses on normal operation control of permanent magnet synchronous wind power generator system. It presents the system model theory and the operation control strategy under all the detailed information, such as reference direction of variables. Then a simulation for the normal operation of PMSG system is carried out in PSCAD with the desired results obtained.
A possible workflow for designing high power electronic converters for using with renewable sources, such as wind energy farms, is proposed. It takes care of both the control strategies and the electrical characteristics of the electron devices (as IGBTs and PiN diodes) used for the converter. The control feedback loop is designed by using a MATLAB/SIMULINKtrade based model, while a more detailed...
Dispersed power generation systems are expected as important electric power supply systems for the next generation. Wind power generation system (WPGS) is widely being introduced in the worldwide power utilities. The WPGS output power fluctuates due to wind speed variations. Hence, if a large number of wind power generators are connected to the grid system, their output can cause serious power quality...
The paper examines different control strategies for a VAWT drive. A technique is also proposed for a sensorless application allowing to maximize the output power up to the rated wind speed and to satisfy the mechanical and SPMG heating constraints in the higher wind speed range profiting, at the same time, by high wind speed periods. The results of the implementation of this strategy based on an equivalent...
Increasing numbers of wind turbines are connected to electrical power systems. Wind turbines are based on technologies different from the synchronous generator, such as the squirrel cage induction generator and high or low speed generators that are grid coupled through a power electronic converter. When connected in small amounts, the impact of distributed generation on power system transient stability...
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