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Proceedings ArticleDOI

Testing of wind generator models using motor drive

TL;DR: Details of facility to test wind generator in the laboratory are given and the impact of gear box and variation in the speed on the flicker initiated in the wind turbine can be observed.
Abstract: This paper gives details of facility to test wind generator in the laboratory. Various types of prime movers may be used in the test set up. These prime mover motors can be DC motor, induction motor, synchronous motor or permanent magnet synchronous motor. The generator may be any kind of generator like DC generator, induction generator, synchronous generator, permanent magnet synchronous generator etc. The speed of the prime mover motor is varied. As the generator is coupled with the motor speed of the generator is also varied. The speed of the generator is varied over a wide range. The impact of the change in the speed of the generator on the output and output voltage flicker is observed. The gear box is also provided. It can be connected in between the generator and the motor. So the speed of the generator is increased. The impact of gear box on the power quality also can be observed. The test is carried on the generator with and without gearbox. The impact of gear box and variation in the speed on the flicker initiated in the wind turbine can be observed.
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12 Dec 2014
TL;DR: Electrical Generation and Distribution Systems and Power Quality DisturbancesTerrorism and the Electric Power Delivery SystemPower Quality in Power Systems and Electrical MachinesAdvances in Electrical and Computer TechnologiesPower Quality Issues in Distributed GenerationPower QualityPower System HarmonicsUnderstanding Power Quality ProblemsPower Quality problems and Its Mitigation TechniquesPower Quality Problems and Mitigation Methods: Case Study at DBBFSignal Processing of Power QualitydisturbancesElectric Power QualityMicrogrid Architectures, Control and Protection MethodsPower Quality issues.
Abstract: Electrical Generation and Distribution Systems and Power Quality DisturbancesTerrorism and the Electric Power Delivery SystemPower Quality in Power Systems and Electrical MachinesAdvances in Electrical and Computer TechnologiesPower Quality Issues in Distributed GenerationPower QualityPower System HarmonicsUnderstanding Power Quality ProblemsPower Quality Problems and Its Mitigation TechniquesPower Quality Problems and Mitigation Methods: Case Study at DBBFSignal Processing of Power Quality DisturbancesElectric Power QualityMicrogrid Architectures, Control and Protection MethodsPower Quality IssuesComputing Algorithms with Applications in EngineeringICCCE 2020Renewable and Efficient Electric Power SystemsHandbook of Research on New Solutions and Technologies in Electrical Distribution NetworksGeomagnetic Disturbances Impacts on Power SystemsComputational Paradigm Techniques for Enhancing Electric Power QualityEmerging Trends in Electrical, Communications and Information TechnologiesPower Quality in Electrical SystemsElectric Power SystemsPower Quality in Modern Power SystemsPower System Protection in Smart Grid EnvironmentIntegration of Renewable Energy Sources with Smart Grid7th IEEE India International Conference on Power ElectronicsPower Electronics and Power QualityInstantaneous Power Theory and Applications to Power ConditioningElectrical Power Systems QualityHandbook on Battery Energy Storage SystemLoad Flow Optimization and Optimal Power FlowHandbook of Power QualityPower Quality in Power Systems and Electrical MachinesDistribution Reliability and Power QualityPower Quality Enhancement Using Custom Power DevicesPower System Harmonics Analysis, Effects and Mitigation Solutions for Power Quality ImprovementPower QualityBow Ties in Process Safety and Environmental ManagementPower System Control Under Cascading Failures

713 citations

Journal ArticleDOI
TL;DR: In this article, a simulation model of a MW-level variable speed wind turbine with a doubly fed induction generator was developed in the simulation tool of PSCAD/EMTDC.
Abstract: Grid connected wind turbines may produce flicker during continuous operation. This paper presents a simulation model of a MW-level variable speed wind turbine with a doubly fed induction generator developed in the simulation tool of PSCAD/EMTDC. Flicker emission of variable speed wind turbines with doubly fed induction generators is investigated during continuous operation, and the dependence of flicker emission on mean wind speed, wind turbulence intensity, short circuit capacity of grid and grid impedance angle are analyzed. A comparison is done with the fixed speed wind turbine, which leads to a conclusion that the factors mentioned above have different influences on flicker emission compared with that in the case of the fixed speed wind turbine. Flicker mitigation is realized by output reactive power control of the variable speed wind turbine with doubly fed induction generator. Simulation results show the wind turbine output reactive power control provides an effective means for flicker mitigation regardless of mean wind speed, turbulence intensity and short circuit capacity ratio.

257 citations

Journal ArticleDOI
TL;DR: In this article, an analysis and the modeling of the flicker emission of wind turbines is presented, where the theoretical aspects of flicker algorithm, wind turbine characteristics, and the generation of wind turbine flicker during continuous operation are discussed.
Abstract: This paper presents an analysis and the modeling of the flicker emission of wind turbines. Measurements compared with international standards are discussed. The paper concentrates on the theoretical aspects of the flicker algorithm, wind turbine characteristics, and the generation of flicker during continuous operation of wind turbines.

204 citations

Journal ArticleDOI
TL;DR: In this article, a frequency domain method to study flicker propagation is presented, which is based on propagation of frequency components from WECS output currents throughout the grid, and an algorithm for flicker measurement in the frequency domain, which allows Pst calculation is proposed.
Abstract: Wind energy conversion systems (WECS) produce fluctuating output power, which may cause voltage fluctuations and flicker. Flicker assessment in networks may be difficult since its evaluation requires long computing time and special procedures to calculate the flicker severity index, Pst. In this paper, a frequency domain method to study flicker propagation is presented. This method is based on propagation of frequency components from WECS output currents throughout the grid. In this way, a fast flicker analysis in a network of any size can be performed. Also, an algorithm for flicker measurement in the frequency domain, which allows Pst calculation, is proposed. Several study cases have been performed, and results have been compared with time domain simulations, showing good agreement between them.

89 citations

Journal ArticleDOI
TL;DR: In this article, a power curve monitoring method for wind turbines was developed to prevent a turbine failure in a wind farm, which automatically calculates the power curve limits and generates an alarm message when the wind speed-power data measured at the wind turbine deviate from the power-curve limits.
Abstract: A novel power curve monitoring method for wind turbines was developed to prevent a turbine failure in a wind farm. Compared with the existing methods, this algorithm automatically calculates the power curve limits for power curve monitoring, even when a considerable number of abnormal data are included in wind speed-output power data measured at a wind turbine. In addition, the proposed algorithm automatically generates an alarm message when the wind speed-power data measured at the wind turbine deviate from the power curve limits, particularly considering their degree of deviation from the power curve limits and the cases when the measured data hover between the Warning Zones and the Alarm Zones. We confirmed its effectiveness through its field tests.

72 citations