Abstract
3-phase converters are often used to connect large-capacity photovoltaic power generation and/or electric vehicles to the grid. Normally, dq transformation is used for current control of 3-phase converter. The dq transformation requires the phase of the grid voltage, and phase locked loop (PLL) is commonly used. However, the increased computational load of the PLL may cause a delay in responsiveness. In this paper, we propose the current control method without PLL and the method of controlling negative sequence component using positive sequence component. The effectiveness of the proposed method against grid faults was confirmed by experiments.
https://ror.org/0197nmd03 
