High-proportion new energy power grid transient state voltage stability optimization control method

The invention discloses a high-proportion new energy power grid transient state voltage stability optimization control method. The method comprises the following steps of 1, performing power grid transient state voltage instability scene searching in an anticipated fault; 2, calculating emergency control measure quantity E for ensuring power grid transient state voltage stability to obtain emergency control cost C for ensuring power grid stability; 3, in a high-proportion new energy power grid, determining a key bus B of a configuration phase modifier; and 4, by taking the lowest control cost as the optimized target, optimizing the configuration capacity of the phase modifier and the emergency control quantity after an accident. By virtue of coordination of capacity configurationof the phase modifier before the accident and emergency control after the accident, and by taking the lowest control cost as the optimized target, the transient state voltage stability of the high-proportion new energy power grid in s