Modeling and Direct Power Control Method of Vienna Rectifiers Using the Sliding Mode Control Approach

Abstract

This paper uses the switching function approach to present a simple state model of the Vienna-type rectifier. The approach introduces the relationship between the DC-link neutral point voltage and the AC side phase currents. A novel direct power control (DPC) strategy, which is based on the sliding mode control (SMC) for Vienna I rectifiers, is developed using the proposed power model in the stationary a b -reference frames. The SMC-based DPC methodology directly regulates instantaneous active and reactive powers without transforming to a synchronous rotating coordinate reference frame or a tracking phase angle of grid voltage. Moreover, the required rectifier control voltages are directly calculated by utilizing the non-linear SMC scheme. Theoretically, active and reactive power flows are controlled without ripple or cross coupling. Furthermore, the fixed-switching frequency is obtained by employing the simplified space vector modulation (SVM). SVM solves the complicated designing problem of the AC harmonic filter. The simplified SVM is based on the simplification of the space vector diagram of a three-level converter into that of a two-level converter. The dwelling time calculation and switching sequence selection are easily implemented like those in the conventional two-level rectifier. Replacing the current control loops with power control loops simplifies the system design and enhances the transient performance. The simulation models in MATLAB/Simulink and the digital signal processor-controlled 1.5 kW Vienna-type rectifier are used to verify the fast responses and robustness of the proposed control scheme.

Three-phase power factor corrector with direct power control and power supply of the unbalanced industrial network

“…There are many ways to provide control of threephase PFC. Methods of immediate network current curve shaping [8][9][10] and direct power control [11][12][13][14][15] are the most widely used. Here we have chosen the method of direct power control.…”

A Fast Processing Discontinuous Control Strategy for Vienna Rectifier

“…The relationship between the controlled duty cycle and the voltage unbalance is established through the state-space model of the system and based on this relationship, an optimal zero-sequence component for the duty cycle is found to achieve zero current injection to the DC-link neutral point [19]. Ma et al [20] introduced a high-frequency model based on the relationship between the neutral point voltage and the AC currents. Here, the neutral point voltage balance is effectively managed by regulating the time of SVM redundant small vector pair during a duty cycle.…”

Comparative Analysis of RBFN andFuzzy-SVPWM Controller Based Boost TypeVienna Rectifier for 1kW Wind EnergyConversion System

“…It is become very popular over regular converters because of its merits like power factor correction [19,20], input current shaping [20], total harmonic distortion (THD) reduction [22,23]. Many control strategies are introduced to control the Vienna Rectifier like sliding mode, SVPWM, PMC (Predictive Model Control), hysteresis control and adaptive neural network control [22][23][24][25][26][27][28][29] techniques etc.…”