First I would like to express my sincere thanks to my supervisor, Dr. Prabath J.Binduhewa for his passionate instruction and guidance throughout the period.
Next I would like to thank my loving mother and specially my loving sister, for providing me with love, support, and encouragement to move ahead during this period.
Further I would like to thank everyone who helped me to gather power consumption data of the Greater Rathnapura Water treatment plant.
I also want to acknowledge my colleagues namely Miss. M.P.P Mithila (Electrical Engineer, International construction consortium (pvt) ltd), who helped me with finding information and the support given to resolve problems encountered during this research work.
I also wish acknowledgment to the people who give support direct or indirectly to the research and during the thesis writing. Once again, thank you very much.