Analysis of Tie-Line Impact on Frequency Response in Multi-Area Power Systems

This work primarily focuses on investigating how the frequency response of a power system may change due to the addition or failure of tie-lines. The proposed method enables the analysis of two specific scenarios: firstly, assessing the potential enhancement in frequency response by adding an extra tie-line between two areas, and secondly, evaluating the deterioration in frequency response when one tie-line is disconnected. One notable advantage of the proposed method is its reliance solely on actual frequency response measurements from individual areas, thereby eliminating the need for extensive knowledge of system parameters. The effectiveness of this method is evaluated by comparing the analytically derived frequency responses with those obtained through simulation.