Practical power system operation criterion and expansion planning based optimal placement of facts controllers

The practical power system operation criterion along with short term and long term expansion planning are most important parameter to be factored into the decision of the optimal location of FACTS controllers for achieving the maximum benefit of FACTS controllers. This paper proposes the optimal location of TCSC controllers in the power transmission system to eliminate or alleviate line overloads in the system based on practical power system operation criterion. The concept of line flow overload sensitivity index (LFOSI) of the system lines with reference to real time generation mix strategies based on conventional and nonconventional generation, seasonal load pattern, peak and off-peak conditions, adhering grid discipline, permitting power transactions, future projected demand, network modification and capacity addition have been developed. The proposed concept of FACTS placement using LFOSI based on practical operation criterion and expansion planning approach has been extensively analyzed and implementation methodology is also developed to decide the optimal location of FACTS controllers so as to consider practical operation criterion and expansion planning systematically.