HVDC (High Voltage Direct Current) systems are increasingly being applied to improve power system operation\nand controllability. However, inappropriate setting of HVDC controller may have a detriment effect on the system\nperformance. Generally, PSS (Power System Stabilizer) is known as a simple concept, easy to perform, and\ncomputationally effective to enhance damping of power system oscillations through excitation control of synchronous\ngenerator. This paper examines the effectiveness of the PSS to enhance the dynamic performance of\nAC-DC power systems and to compensate the negative damping of HVDC system. The dynamic performance is\nevaluated by examining the system response to various disturbances. In order to ensure the reliability of the simulation\ntest results as well as the performance of the PSS, detailed HVDC modeling is adopted using SimPowerSystems\ntoolbox in the MATLAB, and some important conclusions are drawn.
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