NETE Predictive Control Strategies Operating at Fixed Switching Frequency for Input Filter Resonance Mitigation in an Indirect Matrix Converter

Abstract

The classic model predictive control leads to a
variable switching frequency which could produce resonances in
the input filter of the matrix converter, affecting the performance
of the system. This paper proposes two methods to mitigate the
resonance of the input filter to solve this issue. The first method
consists in a hybrid combination of model predictive current
control with instantaneous reactive power minimization and an
active damping method which consists in emulating a virtual
resistor in parallel to the input filter’s capacitor. The second
method imposes a sinusoidal source current instance to minimize
the instantaneous reactive power at the input side. Both methods
can be further enhanced with fixed switching frequency
operations. Simulated results confirm the feasibility of the
proposal demonstrating that the performance of the system is
improved with source and load currents showing a significant
reduction in the harmonic distortion produced by the filter
resonance.