Research on Coordinated Control Strategy of Flow Changer Tap Switch in HVDC System
摘要
The on-load tap changer of converter transformer is an important piece of equipment for realizing voltage and power regulation functions in the UHVDC transmission system. However, the on-load tap changer of the converter transformer is prone to failure during gear adjustment, resulting in the converter transformer being out of the running state. Therefore, it is necessary to study the tap position of the on-load tap changer of the converter transformer. Based on this, this paper adopts fuzzy control theory to establish the control system of the on-load tap changer of the converter transformer, and the tap position fault of the converter transformer with a high-end valve group on the rectifier side is simulated and analyzed. The simulation results show that the on-load tap changer controller based on fuzzy control can effectively solve the tap fault of the converter transformer.