Security check is an important link for power system safety. Based on the service bus and parallel computation technology of the smart grid dispatching and control system

service-oriented security check is studied and developed to provide customizable security check service for day-ahead scheduling

schedule adjustment and power grid dispatching operation. Scheduled power flow is the key function in security check. According to the hierarchical dispatching mode of China power grid

a scheduled power flow algorithm based on multi-section power flow control technology is proposed. Voltage and reactive power automatic adjustment and intelligent adjustment for non-convergence of power flow are used to improve convergence and rationality. Day-ahead schedule security check for multi-level dispatching is studied. The practicability is enhanced by checking schedule data and counting some technical indices.