Traffic flow scheduling algorithm based on gate control and traffic shaping mechanism of TSN network in substation

Substation protection and measurement and control services are very important for real-time monitoring of abnormal power grid operation and timely handling of faults. Among them, sample value packets and switch state packets belong to time-delay sensitive and periodic traffic types. The traditional best-effort network transmission mode cannot meet the transmission requirements of service flows in controllable delay and jitter. Based on TSN network gating and traffic shaping mechanism, the efficient transmission of substation protection and measurement and control sensitive service flows can be realized. Based on the dual-network redundant architecture of smart substation, a scheduling mechanism for multiple sensitive service flows was designed. When delay and jitter were introduced in TSN switches at different levels, and under the condition of considering the background traffic of various device configuration management messages, the transmission path with minimum cost was dynamically selected to ensure bounded delay and jitter for protection and measurement and control service flows. Numerical simulation results show that the performance of the proposed scheduling algorithm is close to the theoretical optimal value.