Covariance Analysis-guided Energy Storage System Deployment for Available Transfer Capability Enhancement

The high variability introduced by renewable generation may lead to a reduction of the available transfer capability (ATC). In this paper, a novel conceptual method of ATC enhancement is proposed which improves the ATC by reducing the variance of the total transfer capability (TTC). Compared to the conventional methods that aim to shift the mean of TTC to the right, the proposed method can improve the utilization of transmission assets. The nucleus of the proposed method lies in a developed algorithm that can identify the most influential random variables to the variation of TTC. As such, smoothing out the power fluctuations of the main contributors will reduce the variance of TTC most effectively. Numerical study on the IEEE 24-bus reliability test system (RTS) is presented to demonstrate the effectiveness and the efficiency of the proposed method.