Direct Power Control for various topologies of three phase grid-connected Voltage Sources Converters using Sliding Mode Control

2012 ◽  
Author(s):  
S. Huseinbegovic ◽  
B. Perunicic ◽  
C. Milosavljevic ◽  
B. Veselic
Keyword(s):  
Sliding Mode Control ◽  
Power Control ◽  
Sliding Mode ◽  
Direct Power ◽  
Direct Power Control ◽  
Mode Control ◽  
Three Phase

scholarly journals Integral Sliding-Mode Control-Based Direct Power Control for Three-Level NPC Converters

Energies ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 227 ◽  
Author(s):  
Hao Lin ◽  
Jose I. Leon ◽  
Wensheng Luo ◽  
Abraham Marquez ◽  
Jianxing Liu ◽  
...  
Keyword(s):  
Sliding Mode Control ◽  
Power Control ◽  
Control Strategy ◽  
Sliding Mode ◽  
Harmonic Distortion ◽  
Direct Power ◽  
Direct Power Control ◽  
Integral Sliding Mode Control ◽  
Integral Sliding Mode ◽  
Mode Control

Three-level neutral-point-clamped (NPC) converter is widely used in energy conversion systems due to its good properties for high-power systems presenting output waveforms with reduced harmonic distortion. To obtain better system performance, an integral sliding-mode control (ISMC)-based direct power control (DPC) strategy is proposed for NPC converters. The controller achieves three objectives. First, an extended state observer (ESO)-based ISMC strategy, to enforce the active and reactive power to their reference values, is applied in the power tracking loop. ESO is used to reduce the influence of parameter uncertainties. Next, in the voltage regulation loop, a radial basis function neural network (RBFNN)-based adaptive ISMC strategy is applied to regulate the DC-link voltage. RBFNN is used to estimate the load variation, which is considered as a disturbance, to improve the system disturbance rejection ability. An adaptive law is used in the controller to reduce the chattering of reference active power which can reduce the current harmonic distortion. Finally, a proportional-integral (PI) control strategy is applied in the voltage balancing loop to achieve voltage balance between two DC-link capacitors. Experimental results show the effectiveness and superiority of the proposed control strategy for the NPC power converter compared with PI-based DPC strategy.

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