Methods of source current reference generation for predictive control in a direct matrix converter

Abstract

Rivera, M (Rivera, Marco). Univ Talca, Dept Ind Technol, Talca 747C, Chile.Two control strategies that allow the control of source and load currents for direct matrix converters are presented in this study. Both methods use the switching state of the converter in the subsequent sampling time, based on an optimisation algorithm given by a simple cost function and the discrete system model. The control goals include regulation of load currents according to an arbitrary reference and good tracking of the source currents to their references. In the first method, the input current reference is given as a function of the instantaneous active power. In the second case, the source current reference is given as a function of the output current reference and system parameters. Experimental results with an experimental prototype support the theoretical approach

Predictive control in matrix converters — Part I: Principles, topologies and applications

“…As reported in [25]- [28], [31], [33]- [36], [70] this strategy performs well with a very good behavior in both steady and transient state showing to be a very good alternative to classical control strategies. …”

A review of predictive control techniques for matrix converter applications

“…5 and in [15], [17], [23] demonstrate that by imposing a given waveform for the source current, it is possible to obtain a better performance than with an instantaneous reactive power minimization (Fig. 4), reducing the total harmonic distortion (THD) of both input and load currents.…”

“…However, it has been observed that the PCC, using the reactive power minimization term, is very sensitive to the distortion of the source voltage and resonance of the input filter [16] (before =0.06[s]). By implementing active damping method (after =0.06[s]), it is possible to improve the performance of the system by mitigating the resonances of the input filter [16], [17]. It is also possible to force the source current to follow a sinusoidal reference value, regardless of the distortion level at the input side.…”

“…An alternative approach is to use active damping, which can improve the input current quality and minimize the instantaneous reactive input power. However, this method only mitigates higher current harmonics resulted from the switching operation and cannot ensure sinusoidal input currents, particularly when the source voltage is distorted [16], [17]. To overcome these issues, in the implementations done with predictive control, the term that minimizes the reactive power at the input side is replaced by a direct control of source currents.…”

“…To overcome these issues, in the implementations done with predictive control, the term that minimizes the reactive power at the input side is replaced by a direct control of source currents. This approach forces the input currents to follow the sinusoidal value, regardless of the distortion level at input side [15], [17], [23].…”