Design and Comparison of Feasible Control Systems for VSC-HVDC Transmission System

This Paper presents the modeling and control of two-terminal Voltage Source Converter Based High Voltage Direct Current (VSC-HVDC) transmission system which are achieved using the software of PSCAD/EMTDC. There are two control designs for VSC-HVDC system in this project: 1. Phase and magnitude control design, 2. Control design under d-q frame. The VSC-HVDC system is operated successfully by using these two control methods respectively. Finally, this paper illustrates the analysis of steady state tests and dynamic load tests of VSC-HVDC system, as well as the comparison of the two control methods.