Advanced Control Methods of DC/AC and AC/DC Power Converters—Look-Up Table and Predictive Algorithms

Abstract

This chapter is devoted to a modern look-up table and predictive control methods of three phase power electronic converters. The authors consider voltage source converters in two and three level configurations as well as a two level current source rectifier. Some of the methods concern DC/AC inverter fed induction and PMSM motors. The other methods described in this chapter are dedicated to the control of the AC/DC rectifier working as an Active Front End of an AC/DC/AC converter. The authors focus on the methods with a non-linear look-up table and predictive control due to their excellent dynamic properties (limited only by the physical parameters of controlled systems such as the value of the DC voltage, grid inductance or AC motor leakage inductance). Moreover, non-linear methods, especially the predictive ones, provide very good quality of control in steady states, i.e. lack of active and reactive power steady-state error (AC/DC) or torque error (in the case of DC/AC converters). Look-up table methods have been taken into consideration as they also ensure the above advantages in a relatively short calculation time. The selected look-up table and predictive methods are proposed for both 2-level and 3-level converters. All the described control methods have been illustrated by simulation results and laboratory tests confirming their characteristics.