DECLARATION This thesis entitled controlling of pitch angle FOR VARIABLE SPEED pmsg wind turbine has been carried out by me in the partial fulfilment of the requirements for the award of the degree of M.E (Power systems & Automation), in the Department of Electrical and Electronics Engineering, S.R.K.R. Engineering College, (affiliated to Andhra University),Bhimavaram. I hereby declare that this thesis has not been submitted to any other university/institute for the award of any other degree/diploma. Josyula s lakshmi tejaswi (Regd. No. 313275727011)

ACKNOWLEDGEMENT Words are inadequate to express the overwhelming sense of gratitude and humble regards to my supervisor Sri .Y BHANU CHANDRA, Associate Professor, Department of Electrical and Electronics Engineering for his constant motivation, support, expert guidance, constant supervision and constructive suggestion for the submission of my progress report of thesis work controlling of pitch angle FOR VARIABLE SPEED pmsg wind turbine ".

I highly indebted to Dr.D.RANGARAJUgaru, PRINCIPAL,S.R.K.R Engg.college for the facilities provided to accomplish this thesis work.

I express my gratitude to Prof. N.SRINIVASU Head of the department of EEE, for his help and support during my study. I am thankful for the opportunity to be a member in Electrical and Electronics Engineering Department in S.R.K.R Engg.college, Bhimavaram.

I also thank all the teaching and non-teaching staff for their nice co-operation to the students.

I would like to thank all of them whose direct and indirect support helped me to complete my thesis in time.

This report would have been impossible if not for the perpetual moral support from my family members, and my friends. I would like to thank them all.

JOSYULA S L TEJASWI