Analysis of the influence of voltage measurement anomalies on the DC side of UHVDC flexible converter stations

This article takes the valve-side DC voltage transformer measurement anomalies which occurred in UHVDC flexible converter station. Through RTDS simulation, it has been demonstrated that the abnormality in valve-side DC voltage measurement has an impact on control and protection. The abnormal appearance when the DC voltage transformer secondary voltage dividing plate fail, under different types of conditions were analyzed, It is verified by strip inspection of the resistance, The paper researched and summarized this kind of problems, providing a reference for similar fault points in UHVDC projects.