HYBRID AC/MT-HVDC TRANSMISSION LINES AND ITS EFFECTIVE OPERATION USING ENHANCED-FISH SWARM OPTIMIZER

Multi-Terminal-High Voltage Direct Current (MT-HVDC) transmission lines are used to transmit electricity over long distances with lower losses compared to traditional Alternating Current (AC) transmission lines. However, HVDC transmission lines have limitations in terms of their ability to handle AC system faults and the need for expensive AC/DC converters at each end of the line. To address these limitations, a hybrid AC/MT-HVDC transmission line can be used. This type of transmission line combines the benefits of both AC and DC transmission, allowing for more efficient and reliable operation. In this article, an Enhanced-Fish Swarm Optimizer (E-FSO) is presented for the efficient maintenance of hybrid AC/MT-HVDC transmission lines. An external repository is included in the proposed E-FSO to preserve that is not dominant. Additionally, fuzzy decision-making is used to choose the hybrid AC/HVDC transmission lines' optimal compromise operating point. In these systems, in addition to the complete control of AC line through parameters for the dedicated generators and transformers connections, and Volt-Ampere Reactive (VAR) compensations, the Voltage Source Converters (VSCs) action and response controllable voltage is engaged. The outcomes of the experiment show the efficacy and dominance of the suggested algorithm, which has high stability indices compared to several competitive algorithms. Nevertheless, the suggested E-FSO is effective in producing a compromise operating point that satisfies the operator's needs while also obtaining well-diversified solutions.