REVIEW ON CONTROL METHODOLOGIES IN HVDC TRANSMISSION SYSTEM
Multi-terminal HVDC networks are emerging as the most promising technologies to develop such a concept. Moreover, multi-terminal HVDC grids are based on highly controllable devices, which may allow not only transmitting power, but also supporting the AC grids to ensure a secure and stable operation. This paper aims to present an overview of different control schemes for multi-terminal HVDC grids, including the control of the power converters. This paper studies the recent control strategies that have been used in wind farm based HVDC systems. A theoretical analysis of each control strategy has been provided followed by a comparison between their individual characteristic indices as well as their pros and cons.
Index Terms- High Voltage Direct Current (HVDC), Wind Farm Based Systems, Control Strategies, Voltage Source Converter (VSC).