Control Strategy for Receiving-End Power Grid after UHVDC Transmission System Blocking Fault Based on Apriori Algorithm

Once blocking fault occurs in high-capacity ultra-high-voltage direct current (UHVDC) transmission system, it seriously affects the stability of the receiving-end power grid. In allusion to the receiving-end power grid of UHVDC power transmission system, this paper uses the dynamic power flow algorithm to simulate blocking fault of UHVDC power transmission lines. Then association between the tie line section of the power grid and control strategy after the fault is analyzed by Apriori algorithm, the intrinsic connection between the overloaded section and the unit and load control strategy is mined and provides overloaded sections control strategies for DC blocking fault. Finally, the proposed method is validated through the simulation experiment of Jinping-Suzhou DC bipolar blocking fault, the result shows that association analysis based on Apriori algorithm can obtain the connection between the overloaded sections and the unit and load adjustment strategies based on support and confidence, and provides technical support for dispatcher’s decisionmaking.