Title :
Variable Frequency Transformers for Increased Wind Penetration
Author :
Geetha, T. ; Jayashankar, V.
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol., Chennai
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.
Keywords :
power systems; power transformers; short-circuit currents; wind power plants; Indian power system; asynchronous inter connector; grid short circuit; increased wind penetration; point of interconnection; power injection; variable frequency transformers; voltage impact; wind farms; Circuit testing; Connectors; Frequency; Integrated circuit interconnections; Power system interconnection; Power system modeling; Power system simulation; System testing; Transformers; Wind farms; pump storage; variable frequency transformers; wind energy;
Conference_Titel :
Power System Technology and IEEE Power India Conference, 2008. POWERCON 2008. Joint International Conference on
Conference_Location :
New Delhi
Print_ISBN :
978-1-4244-1763-6
Electronic_ISBN :
978-1-4244-1762-9
DOI :
10.1109/ICPST.2008.4745225
