Dynamic Analysis of VSC-HVDC System with Disturbances in the Adjacent AC Networks

VSC-HVDC systems are widely used to integrate wind farms, asynchronous generations and networks operating at different frequencies. The Multi-terminal (MT) multi-fed (MF) HVDC’s the system mainly constituted of VSC’s, renewable sources transmitting bulk power conventional AC grids. A sudden change in steady state even adjacent may create severe disturbances operation such HVDC systems. or DC directly influence performance systems, particularly MT-HVDC MF-HVDC However, known for their intelligent control modulating operational states as when required. This paper presents dynamic analysis due load changes, faults other networks. result indicates that provides decoupled active reactive with capability adjusting mode during various minor major disturbances. Based on results obtained, proposed a novel sensitivity factor indicating percentage coupling among line parameters Furthermore, VSC’s injects harmonic signals both sides system. These harmonics voltage currents get amplified dangerously high magnitude resonance Thus, frequency characteristics subsystems also analyzed using FFT. ±100 kV, 200 MW bipolar MF test is simulated MATLAB/Simulink software.