Concept of Smart Automatic Reclosing for Transient Stability Improvement of Large Power Systems

This paper presents a transient stability analysis of large power systems equipped with smart automatic circuit reclosers (ACRs). ACRs may help to prevent stability loss even in case of unsuccessful reclosure if they are set correctly. First, we need to analyze transient stability loss zones for correct use of smart recloser in large power systems with multiple synchronous generators. Those areas are represented by a matrix of power lines where the same synchronous generator loses its transient stability in case of short circuit. Secondly, we need to link smart recloser with its own zone. Analysis of simulation results in large power systems and main principles of smart reclosers being used are presented below.