Positive Sequence Modeling of AC Drive Systems with Power Interruption Ride-Through Capability in DigSILENT

The paper draws attention towards the significance of positive sequence modeling of AC drive systems for creating the dynamic load model of industrial facilities or for determining the transient stability of the industrial network. The DigSILENT power factory has prebuilt features for positive sequence modeling which are utilized while building and testing the control of AC drives. The power interruption ride-through control has been developed for such a model which prevents the tripping of the AC drives by regulating the DC link voltage at a safe level by utilizing the stored kinetic energy of rotating mass. The simulation results show that such a mechanism helps to ride-through even 1-second power interruption. Finally, the amount of investment saved is estimated while adopting this mechanism over the capacity extension of energy storage for 1-second power interruption ride-through.