The ability to control the active power, reactive power, alternating current (AC) voltage, and direct current (DC) voltage has provided the optimum utilization of the power system. This paper presents the modeling of multi-terminal voltage source converter (VSC)-based high-voltage direct current (HVDC) system. The reactive power by a particular terminal can be maintained constant or controlled. The DC bus voltage and AC voltage are controlled by separate terminal; the active power flow is

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... power flow is maintained by another terminal. Each terminal can control up to two parameters depending on the requirement. Each controlled parameter requires tuning of PI controller gains to achieve satisfactory performance. The analysis of VSC-based HVDC is carried out using vector control. The multi-terminal response of a VSC-HVDC system during load changes, power reversal, and line to ground fault on DC cable are analyzed. Simulation is carried out in RSCAD/RTDS software, and the performance of the system is presented.