ATC evaluation with multi-objective optimization of system stability and economic benefit in power market and its enhancement by FACTS devices

Available transfer capability (ATC) is not only a crucial technical index, but also a strong market signal. In this research, a variant primal-dual predictor-corrector interior point method is presented for the multi-objective optimization of ATC with consideration on both system stability and economic benefit in power market. This method can tackle various stability constraints such as thermal limits, static upper and lower limits, transient angle stability and dynamic voltage stability constraints, etc., and take into account certain economic factors such as social benefit maximization, so as to optimize both stability and economics. Besides the fast evaluation speed and acceptable accuracy, this method is insensitive to the scale of objective system, therefore suitable for the application on bulk systems. Simulation and analysis on two test systems validate the above advantages of this method. In addition, research on how to enhance ATC via FACTS devices is implemented as well.