Large-scale source-grid-load friendly interactive system introduction and real load shedding verification test technology

On the basis of briefly analysing the construction background, systemic function, and practice situation of large-scale source-grid load friendly interactive system and introducing real load shedding verification of the system, this paper proposed an effective strategy validation technique based on preset instruction release mode, a time test method of real load shedding control command transmission according to global GPS clock synchronisation technology, and a frequency measurement method according to zero-crossing detection and digital filter technology. These methods can accurately measure the system's control time and dynamic frequency on real load shedding. The real experimental results verified that quick load shedding time and frequency control effect when DC-blocking fault happens meet system expectations. It effectively verified the function design of large-scale source-grid-load friendly interactive system.