Pedro Roncero-Sánchez, Alfonso Parreño Torres, Javier Vázquez, Francisco Javier López-Alcolea, Emilio J. Molina-Martínez and Felix Garcia-Torres in Energies. Publication access here.

This paper presents a multiterminal HVDC system that not only controls the flows of active power between

four different networks, but also compensates imbalances and harmonics in the grid currents to maintain balanced and sinusoidal voltages at the point of common coupling of the various grids. The compensation is carried out by the voltage-source converters (VSCs) connected to their respective AC grids. A control scheme based on the use of resonant regulators and proportional–integral (PI) controllers is responsible for of achieving the necessary power flow control with the amelioration of the PQ

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