Intelligent Control System of High Voltage Transmission Converter Valve Based on Computer Technology

This article deeply studies the application of intelligent control system for high-voltage transmission converter valve based on computer technology in hybrid multi-terminal DC transmission system and its coordinated control strategy for DC voltage. With the help of advanced computer technology, the system achieves precise control and intelligent management of converter valve, significantly improving the stability and controllability of power system. In steady state conditions, this study specifically considers the impact of equivalent resistance of DC line on the control of DC voltage station, and designs targeted control strategy to effectively avoid long-term overvoltage operation problem of DC side voltage in multi-terminal DC transmission system. In transient conditions, this paper proposes a DC voltage coordination control scheme dominated by master-slave control, supplemented by voltage deviation control as a backup strategy. At the same time, the study also designs a smooth switching control strategy for slave station to take over DC voltage control authority and a logic simplified voltage deviation control strategy to further enhance the robustness and stability of the system. Finally, an electromagnetic transient model of hybrid multi-terminal DC transmission is built through computer software Matlab/Simulink environment, and the proposed control strategy is verified by simulation. The results prove its correctness and effectiveness. This study provides strong theoretical support and practical guidance for intelligent control and optimization of high-voltage DC transmission system.