A Novel Modulated Model Predictive Control of UPFC Based on DMC

Existing modulation and control strategies of direct matrix converter (DMC) cannot take both fast response and waveform quality into account, and there is also a lack of research on its application to complex scenarios such as power systems. In this paper, a mathematical model of DMC-UPFC is established based on the characteristics of DMC and the principle of unified power flow controller (UPFC), then a novel modulated model predictive control algorithm is proposed by combining the advantages of space vector modulation and model predictive control. In order to deal with the unbalanced conditions which is common in the power system, a compensation strategy is adopted as well. Simulation and experimental results verify that adequate dynamic performance and considerable waveform quality is achieved by using the proposed method. It can maintain power stability and current sinusoidal even under unbalanced conditions, which further verifies the feasibility of the scheme.