On flatness-based control for series-connected VSC for voltage dip mitigation

Abstract

The grid connected series converter is a custom power device that is mainly used for mitigation of voltage sags. In this paper a novel direct flatness-based control (FBC) in cascade configuration, constituted by an outer voltage and an inner current controller, is presented. It can absorb and inject active and reactive power into the grid. Simulation model includes the practical limitation of voltage source converter output voltage and computational delay. Then, the simulations results for the FBC under balanced voltage dips are presented and compared with traditional proportional integral controller. Finally, the sensitivity analysis of the FBC for grid frequency, phase angle jump and inaccurate knowledge of system parameters are presented.

Impact of Electric Vehicle Charging on Voltage Unbalance in an Urban Distribution Network

“…4 that contains an inner current loop and outer loop for voltage. An elaborated description of the control method can be found in [29,30].…”

Modeling of a Photovoltaic-Powered Electric Vehicle Charging Station with Vehicle-to-Grid Implementation

“…The configuration of the power converter is shown in Figure 4. The controller design for the AC/DC power converter is based on the internal model principle to achieve a minimum tracking error and ripple-free output DC voltage V dc , as described in [40,41]. The control scheme of a double loop structure is shown in Figure 5 that contains an inner current loop and outer loop for voltage.…”