TY - JOUR AU - Oni, Oluwafemi E. AU - Swanson, Andrew G. AU - Carpanen, Rudiren Pillay PY - 2020/03/10 Y2 - 2024/03/29 TI - Small signal stability analysis of a four-machine system with placement of multi-terminal high voltage direct current link JF - Journal of Energy in Southern Africa JA - J. energy South. Afr. VL - 31 IS - 1 SE - Articles DO - 10.17159/2413-3051/2020/v31i1a7430 UR - https://energyjournal.africa/article/view/7430 SP - 73-87 AB - <p><em>Inter-area oscillation caused by weak interconnected lines or low generator inertia is a critical problem facing power systems. This study investigated the performance analysis of a multi-terminal high voltage direct current (MTDC) on the damping of inter-area oscillations of a modified two-area four-machine network. Two case studies were considered, utilising scenario 1: a double alternating current (AC) circuit in linking Bus_10 and Bus_11; and scenario 2: a three-terminal line commutated converter high voltage direct current system in linking Bus_6 and Bus_11 into Bus_9. It was found that scenario 2 utilising MTDC link with a robust controller provided quick support in minimising the network oscillations following a fault on the system. The MTDC converter controllers’ setup offered sufficient support for the inertia of the AC system, thus providing efficient damping of the inter-area oscillation of the system.</em></p> ER -