Case study of grid connected PV plant feeding power to electrical submersible pumps

A 10MW PV (Photo Voltaic) plant, synchronized with grid, connected to a distribution substation that feeds power to electrical submersible pumps in oil field is chosen for grid system studies. Studies such as Load Flow study, Short Circuit study, Transient Stability study, Harmonics study, Relay setting studies were carried out as part of the PV installation project to verify technical feasibility of PV plant operation and to identify technical issues related to grid synchronism. The study incorporates the specific requirements of utility undertaking for grid operation. Results of various system studies are listed in the conclusions. From the studies, in general it appeared that Load Flow, Short Circuit and Transient stability, Relay coordination studies did not pose any electrical risks. Harmonics related measurements will have to be carried out after commissioning to check and confirm the validity of results of harmonic model of the grid study.