This paper proposes a Model Predictive Control (MPC) for a High Voltage Direct Current (HVDC) inserted in an AC network, in order to improve the dynamic behavior performance under input and state non symmetrical constraints. It proposes to model the HVDC and investigates the MPC to improve regional performance and stability of HVDC systems with saturating actuators. More precisely, in this paper sufficient conditions based on Linear Matrix Inequalities (LMIs) are derived for stabilization, in the sense of the Lyapunov method. First, a MPC is designed to mitigate the adverse effects due to the state and control non symmetrical constraints. The proposed strategy is then compared with Linear Quadratic (LQ) control to show the effectiveness of the strategy and validations are performed using a MATLAB/Simulink software.

This paper proposes a Model Predictive Control (MPC) for a High Voltage Direct Current (HVDC) inserted in an AC network, in order to improve the dynamic behavior performance under input and state non symmetrical constraints.To fully capture all range of grid and converter dynamics, an Electromagnetic Transients (EMT) modeling is done. For this, the well known New-England test case is enriched by adding a HVDC link. For the latter, a MPC is synthesized based on Linear Matrix Inequalities (LMIs) conditions for stabilization, in the sense of the Lyapunov theory. Constraints for converters currents are also integrated into the design in order to obtain a control implementable in practice. The proposed strategy is then compared with classic vector control to show the effectiveness of the strategy. Simulations are performed in EMT MATLAB/Simulink/Simpower/Simscape software environment.

In this paper, a robust control strategy, able to improve the dynamic behavior performance of High Voltage Direct Current (HVDC) under diverse operating conditions, is proposed. The design of the control proposed in this paper is based on the coordination of the control actions of the HVDC converters and the use of a simplified control model which takes into account not only the HVDC but also its AC neighbor zone. As consequence, stability is ensured for the HVDC and transient stability margin of its AC neighbor zone is improved. From the computational point of view, Linear Matrix Inequalities (LMIs) are solved to compute the gains of regulator which is of standard Proportional-Integral (PI) type. Constrained on both control and the states are also taken into account. This new methodology was validated on a realistic scale model of the France-Spain interconnection in Eurostag. Compared with the standard vector control, Linear Quadratic (LQ) and H∞ approaches, the new proposed controller gives higher critical clearing time (CCT). In addition, the proposed controller improves the dynamic behavior performance under wide range of operating conditions and minimize the tracking reference error with respect to saturations on both control and the states. A. Proposed Overall VSC-HVDC Control ModelThe proposed control model is based on monopolar HVDC system with metallic return. It has two conversion stations