Induction Machines limits Identification During Abnormal Conditions Using an Optimization Algorithm

Steady-state calculation for a system with induction motor loads is challenging due to motor loads' characteristics. The objective of this paper is to find steady-state variables and operation limits of a system with induction motors using advanced computing tools, e.g., YALMIP. This is achieved through optimization problem formulating and solving. The proposed formulations can accurately identify the maximum load torque limit for induction motor during the occurrence of balanced and unbalanced voltage dip, the minimal voltage level a motor can handle for a given load torque, and state variables of a system under certain operating conditions. Solutions from the optimization problems are validated using electromagnetic transient (EMT) simulation results.