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Variable frequency transformers for increased wind penetration
T. Geetha, V. Jayashankar
Published in
2008
Abstract
The voltage impact of wind farms on weak grids is studied using a generic test system. The size of the wind farm is taken as 20% of the grid short circuit MVA to characterize weak grids. The voltage at the point of interconnection (POI) of the wind farm to the grid is analyzed for different values of grid X/R ratios. It is shown that reduction of real power injection at POI brings the voltage at POI within permissible values for the entire range of X/R ratios. A pumped storage unit or a variable frequency transformer as an asynchronous inter connector is suggested to realize this. Complete modeling and simulation of the proposed network topologies are given. The results are discussed with reference to the Indian power system. © 2008 IEEE.
About the journal
Journal2008 Joint International Conference on Power System Technology POWERCON and IEEE Power India Conference, POWERCON 2008
Open AccessNo
Concepts (21)
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    MODELING AND SIMULATIONS
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    Network topologies
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    Power systems
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    PUMPED STORAGES
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    Real power
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    Short circuits
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    Test systems
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    VARIABLE FREQUENCY TRANSFORMERS
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    WEAK GRIDS
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    Wind energy
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    WIND FARMS
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    WIND PENETRATIONS
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    X/R RATIOS
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    Electric converters
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    Electric network topology
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    Electric power transmission networks
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    Electric utilities
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    FARMS
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    Power transmission
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    Pumps
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    Wind power