Analysis of Power Failure Causes and Optimization Strategy of Valve Control System in Flexible DC Transmission Project

Abstract Kunliulong DC project is the first UHV hybrid multi-terminal in world. The reliability of its valve control system directly related to operation stability project. This paper analyzes trip event caused by power failure pulse box system, determines root cause event, proposes rectification measures based on accident causes, and carries out test verification. proposed scheme has been successfully applied Longmen converter station Kunming Liulong Project. conclusions this have important reference significance for design flexible direct engineering guiding practice.