Under frequency load shedding scheme based on information sharing technology

Under frequency load shedding (UFLS) has a vital role in its effectiveness for preserving system stability for emergency condition. Conventional load shedding schemes have a serious problem of recognizing the disturbance location and amplitude. This paper proposes a centralized decision-making and distributed revising UFLS scheme based on the use of information sharing technology. From the real-time information, the dispatch center delivers the amount of shedding load and the fault place to every station UFLS control center. The station UFLS control center will shed load according to the proportion of power shortage transferred from the dispatch center. The scheme has been verified through programming and simulation. By using the proposed technique, UFLS devices can shed load precisely and effectively to prevent system from collapse during large disturbances.