Voltage flicker assessment of induction motors used in the integrated water pumping station

Now a day´s flicker estimation is one of the necessary tasks in assessment of flicker emission level for the connection of fluctuating loads to electric power systems. This paper suggests a method under the scope of IEC rules for estimating short time voltage flicker (P_ST) severity on a 22/3.3 kV network for supplying an induction motor bearing load for the municipal integrated water pumping system. Measurements are done to identify background voltage flicker levels and the contribution of the already operating induction motors at the point of common coupling. In this paper, above system is simulated using Matlab-7.01, which help in presenting the detailed results of all the voltage flickers compensating methodologies. It analyses and compares performances of different flicker mitigation methodologies for this particular application. It has been found from simulated results that the average flicker emission level has reduced to approximately 34% of its initial level.