The dataset includes the measured impedance data of HVDC converters and DC cables in the paper "Stability and Sensitivity Analysis of Multi-Vendor, Multi-Terminal HVDC Systems", which is coauthored by Yicheng Liao, Heng Wu, Xiongfei Wang, Mario Ndreko, Robert Dimitrovski and Wilhelm Winter, and published by IEEE Open Journal of Power Electronics. The research is funded by TenneT TSO GmbH and collaborated with Aalborg University.