Indirect predictive control techniques for a matrix converter operating at fixed switching frequency

Abstract

Abstract-The direct matrix converter (DMC) has a large number of available switching states, wherewith, the implementation of predictive control techniques requires high computational resources. In addition, the simultaneous selection of weighting factors for the control of input and output variables of the converter complicates the system tuning. In this paper, two indirect model predictive control strategies are proposed in order to reduce the computational cost and also to avoid the use of weighting factors. The proposal is enhanced with a fixed switching frequency strategy in order to improve the performance of the full system. Results confirm the feasibility of the proposal by demonstrating that it is an alternative to classical predictive control strategies for the direct matrix converter Index Terms-current control, matrix converters, predictive control, finite control set model predictive control, fictitious dclink.

Predictive Control Strategies in Power Converters

“…Su mayor inconveniente es que requiere un modelo matemático apropiado y conocido previamente. Varios investigadores coinciden en que existen tres elementos importantes a considerar cuando se aplica MPC y son: i) disminución del costo computacional y con ello el horizonte futuro de predicción [23] , ii) el ajuste de los factores de peso [24] y iii) el incremento de la eficiencia del convertidor [2].…”

“…Uno de los retos más importantes que afecta el desempeño de cualquier modelo MPC es el incremento del contenido armónico [2]. CCS-MPC presenta algunas ventajas en comparación a otras formas de control, debido a la utilización de un modulador de frecuencia fija, lo que implica una respuesta dinámica más rápida y menor contenido armónico.…”

Recent Advances of Predictive Control in Power Converters

“…One of the most important challenges that affects the performance of any MPC model is the increase of the harmonic content [1]. CCS-MPC has some advantages compared to other forms of control, due to the use of a fixed frequency modulator, which implies a faster dynamic response and lower harmonic content.…”

“…Its applicability in almost any sphere of social development such as energy, communications, medicine, mining or transportation, encourages new researchs on the subject. Specifically, control techniques have been a very active research topic in power electronics field, which covers topologies for low, medium and high voltage applications [1], [2]. Control strategies in power converters can be classified into two groups: linear and nonlinear strategies.…”

Predictive-Fixed Switching Current Control Strategy Applied to Six-Phase Induction Machine

“…To overcome this subject, a predictive-fixed switching current control strategy, named (PFSCCS) from now on, applied to a two-level six-phase voltage source inverter (VSI) is presented in this paper. The strategy is based on a modulation concept employed with the MPC scheme, which has been studied for different power converters such as the mentioned two-level six-phase VSI described in [15,16] and also other topologies presented in [17,18]. In the proposed current strategy, three vectors have been considered at every sampling period, composed by two active vectors (taking only into account the largest vectors) and null vector, where their corresponding duty cycles are achieved according to the switching states and a switching pattern has also been used before being applied to VSI in order to generate a fixed switching frequency.…”