Optimal Placement of Facts Device Considering Voltage Stability and Losses using Teaching Learning based Optimization

In the modern power system, under heavy stress conditions, there is always the probability of line outage and resulting in voltage instability. This paper focuses on the optimal siting and sizing of Flexible AC Transmission Systems (FACTS) in the IEEE 30 bus transmission system. The optimization technique Teaching Learning Based Optimization (TLBO) algorithm is utilized to determine the optimal size of the FACT device to minimize real power loss. To reduce search space and computational burden, dv/dq index method is used to identify the weak buses for the placement of the FACTs device. The load flow analysis is performed using a Newton Raphson method. Results show that the TLBO technique is an efficient and effective method for determining the sizing of FACT devices in power system. © 2021, The Institution of Engineers (India).