Modeling industrial load due to severe voltage surges and sags: ‘A case study of magadi soda company’

Industrial load modeling is very important because it enables a power system engineer to determine the status of power system when subjected to gradual or sudden disturbances. This paper presents the measured electric load characteristics of Magadi Soda Company modeled using static model (ZIP model) and dynamic model (slip model). Simulations are done to compare if these models can capture the power quality effects. The result shows that for all the seven cases of sudden disturbances the load is wholly dynamic and the dynamic model gives very accurate results as compared to static model. The load model structure can also be used to estimate the technical energy losses. Symbols; P = active power, Q= reactive power, V = voltage and omega = angular frequency.