Security Corrective Control Considering Electro-Thermal Coupling

In respect of correcting coupled power flow with Security and economy dual guidelines, this thesis starts from the influence of the electro-thermal coupling relationship on the corrective of systematic power flow, and proposes a security corrective control algorithm based on controlling current-carrying in circulation. The algorithm first simulates the temperature change path of the line within the corrective interval after the corrective instruction is issued. Then, the flow constraint conditions are added to the optimal power flow calculation for the branches where temperature overruns may occur. Therefore, the algorithm not only guarantees the Security performance but also reduces the amount of computation due to the increase of state variables. At the same time, the order update of temperature and power flow is carried out in the outer loop of optimal power flow calculation, which ensures accurate calculation of the electro-thermal coupling relationship and reduces the complexity of optimal power flow equation. The simulation results show that the simplified algorithm has advantages in both security and economic requirements.