Optimal Sharing of Real Power Using Robust Controller in Multi-terminal DC Systems

摘要

In this study, a linear matrix inequality (LMI)-based linear quadratic regulator control strategy was designed for five terminal VSC-MTDC systems. The proposed controller was able to distribute and minimize the oscillations in real terminal power and terminal voltages in the presence of power load demand variations. The proposed controller weight matrices were tuned and calculated using LMI tool framework. The stability convergence of the proposed controller proved using Lyapunov theorem. The simulations are demonstrated on five terminal VSC-MTDC systems to illustrate effectiveness against step and random power load demand variations. The proposed controller was reduced to inject undesired oscillations in the grid and enhanced power system stability. The performance of the proposed strategy enhances in terms of time response characteristics and its applicability.