Proceedings ArticleDOI
Variable Frequency Transformers for Increased Wind Penetration
T. Geetha,V. Jayashankar +1 more
- pp 1-8
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In this article, the voltage impact of wind farms on weak grids is studied using a generic test system and 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.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 systemread more
Citations
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Journal ArticleDOI
A new synchronous generator based wind energy conversion system feeding an isolated load through variable frequency transformer
TL;DR: In this paper, the authors explored the possibility of synchronous generator based wind energy generation system feeding an isolated load using a latest power transmission technology i.e. variable frequency transformer (VFT).
Proceedings ArticleDOI
A novel method for grid integration of synchronous generator based wind energy generation system
TL;DR: The proposed method does not employ any power electronic based interface for grid integration of SG based WEGS and hence does not produce harmonics and the control of the proposed method is simple.
Proceedings ArticleDOI
Variable Frequency Transformer - State of the art review
TL;DR: The Variable Frequency Transformer (VFT) as mentioned in this paper is a controllable, bidirectional transmission device that can transfer power in between asynchronous power system networks, where the two separate electrical networks are connected to the stator winding and the rotor winding, respectively.
References
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Journal ArticleDOI
Excitation control system design of rotary type frequency converter for performance improvement of power system dynamics
TL;DR: A rotary type frequency converter using two sets of adjustable speed generators/motors is applied at the interconnections between 50 Hz and 60 Hz power systems in Japan as mentioned in this paper, which can work not only as a power interchanger, but also as power system stabilizer by effectively utilizing energy stored in rotors.
Proceedings ArticleDOI
Variable frequency transformer - an overview
A. Merkhouf,S. Upadhyay,P. Doyon +2 more
TL;DR: The Variable Frequency Transformer (VFT) as mentioned in this paper is a controllable bi-directional transmission device that can transfer power between asynchronous networks, which is similar to conventional asynchronous machines.
Proceedings ArticleDOI
Wind generation stabilization using a hydrogen buffer
TL;DR: In this article, a solution to wind generated electrical power availability is proposed based on the use of the electricity surplus, during low demand hours, for hydrogen generation and storage This hydrogen could be used later to feed fuel cells and compensate wind generator output during peak demand hours Assuming different scenarios for the electricity markets and the wind farm operation, the minimum requirements on energy efficiency of a storage system based on hydrogen as energy vector to become economical competitive for each of those scenarios are deduced.
Proceedings ArticleDOI
Increasing the dispatchability of wind energy through interconnections in Asia and Australia
TL;DR: In this paper, it is shown that in both North East Asia and Australia there will be greater access to hydroelectric dams by wind farms, and that the hydroelectric systems that provide excellent opportunities for storing the intermittent energy from wind farms.
Journal ArticleDOI
The frequency changer era-interconnecting systems of varying cycles
TL;DR: In this article, the authors describe the development of the rotating frequency changer and its application, over the past century, in a variety of utility, industrial, and transportation power systems, in particular the induction-synchronous frequency changers.