Ant lion-Based Optimization of Facts Devices' Controllers to Enhance Three Phase Induction Motor Dynamic Performance

The performance of induction motors is greatly affected by the waveform of the supplied terminal voltage. In many practical cases voltage waveform suffers from problems such as sag, swell or voltage fluctuations, in these cases bad impact on motor is occurred that ranges from reduced performance characteristics to damage. The objective of this paper is to assess the effect of optimized two different shunt compensators in enhancing performance of induction motor voltage profile either in steady state or in transient periods. These two compensators, namely static VAR Compensator (SVC) and static synchronous compensator (STATCOM), are connected one at a time to motor coupling bus to compensate voltage sag or swell. To achieve near optimal dynamic performance, ant lion optimizer (ALO) tunes controllers' parameters of compensators. MATLAB simulation is performed to study the motor performance at different loading and supply voltage conditions. Three study cases are considered to critically asses the performance of the two compensators regarding motor starting performance with variable loads, and the effect of voltage sag. Results of simulation proved that both SVC and STATCOM enhanced and regulated bus voltage, leading to; decreasing startup time, increasing motor capability to start with loads and improving voltage profile. Moreover, STATCOM has better impact on motor performance compared to SVC.