Implementation of FACTS devices for improvement of voltage stability using evolutionary algorithm

Voltage stability is considered as a very crucial factor for a stable and reliable operation of power system. In this paper an IEEE 30 bus system has been taken into account for maintaining the voltage profile at all the buses using Teaching Learning Based Optimization technique (TLBO) and Cuckoo Search Algorithm (CSA). Static Synchronous Compensator (STATCOM) and Static Synchronous Series Compensator (SSSC) are the FACTS devices which are employed for reactive power compensation. Optimal location of STATCOM is taken on the basis of voltage sensitivity indicator dV/dS. The bus which has highest value of voltage sensitivity indicator will be considered as most voltage sensitive bus (weak bus) and STATCOM will be placed at the weak buses. SSSC location will be taken on the basis of reactive power flow through the line and the line with the highest reactive power flow will be considered as the optimal line for placement of SSSC. TLBO and CSA is applied for getting optimal rating of voltage controlling parameters (STATCOM rating; SSSC rating; tap setting; Q-gen rating). Lastly a Comparision between TLBO and CSA has given for voltage stability point of view.